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Sharps K, Foster J, Vieno M, Beck R, Hayes F. Ozone pollution contributes to the yield gap for beans in Uganda, East Africa, and is co-located with other agricultural stresses. Sci Rep 2024; 14:8026. [PMID: 38580752 PMCID: PMC10997645 DOI: 10.1038/s41598-024-58144-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 03/26/2024] [Indexed: 04/07/2024] Open
Abstract
Air quality negatively impacts agriculture, reducing the yield of staple food crops. While measured data on African ground-level ozone levels are scarce, experimental studies demonstrate the damaging impact of ozone on crops. Common beans (Phaseolus vulgaris), an ozone-sensitive crop, are widely grown in Uganda. Using modelled ozone flux, agricultural surveys, and a flux-effect relationship, this study estimates yield and production losses due to ozone for Ugandan beans in 2015. Analysis at this scale allows the use of localised data, and results can be presented at a sub-regional level. Soil nutrient stress, drought, flood risk, temperature and deprivation were also mapped to investigate where stresses may coincide. Average bean yield losses due to ozone were 17% and 14% (first and second growing season respectively), equating to 184 thousand tonnes production loss. However, for some sub-regions, losses were up to 27.5% and other crop stresses also coincided in these areas. This methodology could be applied widely, allowing estimates of ozone impact for countries lacking air quality and/or experimental data. As crop productivity is below its potential in many areas of the world, changing agricultural practices to mitigate against losses due to ozone could help to reduce the crop yield gap.
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Affiliation(s)
- K Sharps
- UK Centre for Ecology & Hydrology, Environment Centre Wales, Deiniol Road, Bangor, Gwynedd, LL57 2UW, UK.
| | - J Foster
- UK Centre for Ecology & Hydrology, Environment Centre Wales, Deiniol Road, Bangor, Gwynedd, LL57 2UW, UK
| | - M Vieno
- UK Centre for Ecology & Hydrology, Bush Estate, Penicuik, Midlothian, EH26 0QB, UK
| | - R Beck
- UK Centre for Ecology & Hydrology, Bush Estate, Penicuik, Midlothian, EH26 0QB, UK
| | - F Hayes
- UK Centre for Ecology & Hydrology, Environment Centre Wales, Deiniol Road, Bangor, Gwynedd, LL57 2UW, UK
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Afzal F, Spieker K, Hurck P, Abt S, Achenbach P, Adlarson P, Ahmed Z, Akondi CS, Annand JRM, Arends HJ, Bashkanov M, Beck R, Biroth M, Borisov N, Braghieri A, Briscoe WJ, Cividini F, Collicott C, Costanza S, Denig A, Dieterle M, Downie EJ, Drexler P, Fegan S, Gardner S, Ghosal D, Glazier DI, Gorodnov I, Gradl W, Gurevich D, Heijkenskjöld L, Hornidge D, Huber GM, Kashevarov VL, Kay SJD, Korolija M, Krusche B, Lazarev A, Livingston K, Lutterer S, MacGregor IJD, Macrae RG, Manley DM, Martel PP, Miskimen R, Mocanu M, Mornacchi E, Mullen C, Neganov A, Neiser A, Oberle M, Ostrick M, Otte PB, Paudyal D, Pedroni P, Powell A, Reicherz G, Rostomyan T, Sfienti C, Sokhoyan V, Steffen O, Strakovsky II, Strub T, Supek I, Thiel A, Thiel M, Thomas A, Usov YA, Wagner S, Walford NK, Watts DP, Werthmüller D, Wettig J, Witthauer L, Wolfes M, Zachariou N. First Measurement Using Elliptically Polarized Photons of the Double-Polarization Observable E for γp→pπ^{0} and γp→nπ^{+}. Phys Rev Lett 2024; 132:121902. [PMID: 38579200 DOI: 10.1103/physrevlett.132.121902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 01/31/2024] [Accepted: 02/02/2024] [Indexed: 04/07/2024]
Abstract
We report the measurement of the helicity asymmetry E for the pπ^{0} and nπ^{+} final states using, for the first time, an elliptically polarized photon beam in combination with a longitudinally polarized target at the Crystal Ball experiment at MAMI. The results agree very well with data that were taken with a circularly polarized photon beam, showing that it is possible to simultaneously measure polarization observables that require linearly (e.g., G) and circularly polarized photons (e.g., E) and a longitudinally polarized target. The new data cover a photon energy range 270-1400 MeV for the pπ^{0} final state (230-842 MeV for the nπ^{+} final state) and the full range of pion polar angles, θ, providing the most precise measurement of the observable E. A moment analysis gives a clear observation of the pη cusp in the pπ^{0} final state.
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Affiliation(s)
- F Afzal
- Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn, Germany
| | - K Spieker
- Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn, Germany
| | - P Hurck
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - S Abt
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - P Achenbach
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - P Adlarson
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - Z Ahmed
- University of Regina, Regina, SK S4S0A2, Canada
| | - C S Akondi
- Kent State University, Kent, Ohio 44242, USA
| | - J R M Annand
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - H J Arends
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Bashkanov
- Department of Physics, University of York, Heslington, York, Y010 5DD, United Kingdom
| | - R Beck
- Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn, Germany
| | - M Biroth
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - N Borisov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - A Braghieri
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
| | - W J Briscoe
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
| | - F Cividini
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - C Collicott
- Department of Astronomy and Physics, Saint Mary's University, E4L1E6 Halifax, Canada
| | - S Costanza
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
- Dipartimento di Fisica, Università di Pavia, I-27100 Pavia, Italy
| | - A Denig
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Dieterle
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - E J Downie
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
| | - P Drexler
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- II. Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany
| | - S Fegan
- Department of Physics, University of York, Heslington, York, Y010 5DD, United Kingdom
| | - S Gardner
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - D Ghosal
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - D I Glazier
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - I Gorodnov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - W Gradl
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - D Gurevich
- Institute for Nuclear Research, RU-125047 Moscow, Russia
| | - L Heijkenskjöld
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - D Hornidge
- Mount Allison University, Sackville, New Brunswick E4L1E6, Canada
| | - G M Huber
- University of Regina, Regina, SK S4S0A2, Canada
| | - V L Kashevarov
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - S J D Kay
- Department of Physics, University of York, Heslington, York, Y010 5DD, United Kingdom
| | - M Korolija
- Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia
| | - B Krusche
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - A Lazarev
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - K Livingston
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - S Lutterer
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - I J D MacGregor
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - R G Macrae
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - D M Manley
- Kent State University, Kent, Ohio 44242, USA
| | - P P Martel
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- Mount Allison University, Sackville, New Brunswick E4L1E6, Canada
| | - R Miskimen
- University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - M Mocanu
- Department of Physics, University of York, Heslington, York, Y010 5DD, United Kingdom
| | - E Mornacchi
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - C Mullen
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - A Neganov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - A Neiser
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Oberle
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - M Ostrick
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - P B Otte
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - D Paudyal
- University of Regina, Regina, SK S4S0A2, Canada
| | - P Pedroni
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
| | - A Powell
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - G Reicherz
- Institut für Experimentalphysik, Ruhr Universität, 44780 Bochum, Germany
| | - T Rostomyan
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - C Sfienti
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - V Sokhoyan
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - O Steffen
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - I I Strakovsky
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
| | - T Strub
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - I Supek
- Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia
| | - A Thiel
- Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn, Germany
| | - M Thiel
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - A Thomas
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - Yu A Usov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - S Wagner
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - N K Walford
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - D P Watts
- Department of Physics, University of York, Heslington, York, Y010 5DD, United Kingdom
| | - D Werthmüller
- Department of Physics, University of York, Heslington, York, Y010 5DD, United Kingdom
| | - J Wettig
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - L Witthauer
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - M Wolfes
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - N Zachariou
- Department of Physics, University of York, Heslington, York, Y010 5DD, United Kingdom
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Ketterer MC, Shiraliyev K, Arndt S, Aschendorff A, Beck R. Implantation and reimplantation: epidemiology, etiology and pathogenesis over the last 30 years. Eur Arch Otorhinolaryngol 2024:10.1007/s00405-024-08568-2. [PMID: 38507077 DOI: 10.1007/s00405-024-08568-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 02/18/2024] [Indexed: 03/22/2024]
Abstract
INTRODUCTION Due to the increasing number of cochlear implant (CI) recipients, growing indications, and the aging population, the reimplantation of CI recipients has become a focus of attention. The aim of this study is to examine the causes, timing, and postoperative speech understanding in a large cohort over the past 30 years. METHODS A retrospective data analysis was conducted on over 4000 CI recipients and 214 reimplanted children and adults from 1993 to 2020. This involved collecting and comparing data on causes, manufacturer information, and demographic data. In addition, a comparison of speech understanding in Freiburg monosyllables and numbers before and after reimplantation was carried out. RESULTS Children did not exhibit elevated rates of reimplantation. The overall reimplantation rate in the entire cohort was 5%. The CI overall survival rate after 10 years in the entire cohort was 95.2%. Device failure was the most common reason for reimplantation, with 48% occurring within the first 5 years after implantation. The second most common reason was medical complications, with the risk of reimplantation decreasing as more time passed since the initial implantation. There were no significant differences in Freiburg numbers and monosyllable comprehension before and after reimplantation, both in the overall cohort and in the subcohorts based on indications. Even a technical upgrade did not result in a significant improvement in speech understanding. DISCUSSION There was no significant difference in the frequency of reimplantation based on patient age, especially when comparing children and adults. Device failure is by far the most common indication for reimplantation, with no significant difference in implant survival between manufacturers. Patients most often choose the same manufacturer for reimplantation. The likelihood of reimplantation decreases with increasing time since the initial implantation. The indication for reimplantation should be carefully considered, as on average, no improved speech understanding is achieved, regardless of the cause, even with a technical upgrade.
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Affiliation(s)
- M C Ketterer
- Department of Otorhinolaryngology-Head and Neck Surgery, Medical Center-University of Freiburg, Killianstrasse 5, 79106, Freiburg, Germany.
| | - K Shiraliyev
- Department of Otorhinolaryngology-Head and Neck Surgery, Medical Center-University of Freiburg, Killianstrasse 5, 79106, Freiburg, Germany
- Department of Otorhinolaryngology, Vivantes, Klinikum Im Friedrichshain, Berlin, Germany
| | - S Arndt
- Department of Otorhinolaryngology-Head and Neck Surgery, Medical Center-University of Freiburg, Killianstrasse 5, 79106, Freiburg, Germany
| | - A Aschendorff
- Department of Otorhinolaryngology-Head and Neck Surgery, Medical Center-University of Freiburg, Killianstrasse 5, 79106, Freiburg, Germany
| | - R Beck
- Department of Otorhinolaryngology-Head and Neck Surgery, Medical Center-University of Freiburg, Killianstrasse 5, 79106, Freiburg, Germany
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Holzleitner N, Fischer S, Maniyankerikalam I, Beck R, Lapa C, Wester HJ, Günther T. Significant reduction of activity retention in the kidneys via optimized linker sequences in radiohybrid-based minigastrin analogs. EJNMMI Res 2024; 14:23. [PMID: 38429609 PMCID: PMC10907560 DOI: 10.1186/s13550-024-01087-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 02/26/2024] [Indexed: 03/03/2024] Open
Abstract
BACKGROUND We recently introduced radiohybrid (rh)-based minigastrin analogs e.g., DOTA-rhCCK-18 (DOTA-D-Dap(p-SiFA)-(D-γ-Glu)8-Ala-Tyr-Gly-Trp-Nle-Asp-Phe-NH2), that revealed substantially increased activity retention in the tumor. However, one major drawback of these first generation rh-based cholecystokinin-2 receptor (CCK-2R) ligands is their elevated activity levels in the kidneys, especially at later time points (24 h p.i.). Therefore, this study aimed to reduce kidney retention with regard to a therapeutic use via substitution of negatively charged D-glutamic acid moieties by hydrophilic uncharged polyethylene glycol (PEG) linkers of various length ((PEG)4 to (PEG)11). Furthermore, the influence of differently charged silicon-based fluoride acceptor (SiFA)-moieties (p-SiFA: neutral, SiFA-ipa: negatively charged, and SiFAlin: positively charged) on in vitro properties of minigastrin analogs was evaluated. Out of all compounds evaluated in vitro, the two most promising minigastrin analogs were further investigated in vivo. RESULTS CCK-2R affinity of most compounds evaluated was found to be in a range of 8-20 nM (by means of apparent IC50), while ligands containing a SiFA-ipa moiety displayed elevated IC50 values. Lipophilicity was noticeably lower for compounds containing a D-γ-glutamate (D-γ-Glu) moiety next to the D-Dap(SiFA) unit as compared to their counterparts lacking the additional negative charge. Within this study, combining the most favorable CCK-2R affinity and lipophilicity, [177/natLu]Lu-DOTA-rhCCK-70 (DOTA-D-Dap(p-SiFA)-D-γ-Glu-(PEG)7-D-γ-Glu-(PEG)3-Trp-(N-Me)Nle-Asp-1-Nal-NH2; IC50: 12.6 ± 2.0 nM; logD7.4: - 1.67 ± 0.08) and [177/natLu]Lu-DOTA-rhCCK-91 (DOTA-D-Dap(SiFAlin)-D-γ-Glu-(PEG)4-D-γ-Glu-(PEG)3-Trp-(N-Me)Nle-Asp-1-Nal-NH2; IC50: 8.6 ± 0.7 nM; logD7.4 = - 1.66 ± 0.07) were further evaluated in vivo. Biodistribution data of both compounds revealed significantly reduced (p < 0.0001) activity accumulation in the kidneys compared to [177Lu]Lu-DOTA-rhCCK-18 at 24 h p.i., leading to enhanced tumor-to-kidney ratios despite lower tumor uptake. However, overall tumor-to-background ratios of the novel compounds were lower than those of [177Lu]Lu-DOTA-rhCCK-18. CONCLUSION We could show that the reduction of negative charges within the linker section of radiohybrid-based minigastrin analogs led to decreased activity levels in the kidneys at 24 h p.i., while maintaining a good tumor uptake. Thus, favorable tumor-to-kidney ratios were accomplished in vivo. However, further optimization has to be done in order to improve tumor retention and general biodistribution profile.
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Affiliation(s)
- Nadine Holzleitner
- TUM School of Natural Sciences, Department of Chemistry, Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany.
| | - Sebastian Fischer
- TUM School of Natural Sciences, Department of Chemistry, Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Isabel Maniyankerikalam
- TUM School of Natural Sciences, Department of Chemistry, Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Roswitha Beck
- TUM School of Natural Sciences, Department of Chemistry, Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Constantin Lapa
- Nuclear Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany
- Bavarian Cancer Research Center (BZKF), Bavaria, Germany
| | - Hans-Jürgen Wester
- TUM School of Natural Sciences, Department of Chemistry, Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Thomas Günther
- TUM School of Natural Sciences, Department of Chemistry, Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany.
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Beck R, Aschendorff A, Arndt S, Hildenbrand T, Rauch AK, Ketterer MC. Evaluation of insertion quality of a slim perimodiolar electrode array. Eur Arch Otorhinolaryngol 2024; 281:1215-1220. [PMID: 37773530 PMCID: PMC10858093 DOI: 10.1007/s00405-023-08212-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 08/25/2023] [Indexed: 10/01/2023]
Abstract
OBJECTIVES The influence of cochlear morphology and electrode array design on scalar position and dislocation rates is of great interest in CI surgery. The aim of this study is to evaluate scalar position and specific points of dislocation in relation to cochlear morphology in patients implanted with a new slim perimodiolar electrode array. MATERIALS AND METHODS Patients were implanted using the slim modiolar electrode array (= SMA) (= 532/632 electrode array of Cochlear™). Postoperative imaging was performed via cone beam computed tomography (CBCT) and the scans were analyzed regarding cochlear morphology (distances A and B and cochlear height), scalar location of the electrode array, basal insertion depth and apical insertion angle. Furthermore, electrode array design and surgical protocols were evaluated. RESULTS 81 ears implanted with the SMA were retrospectively included. We evaluated 3 electrode array tip fold over intraoperatively via X-ray imaging and performed revision during the same surgery. The CBCT scans showed 76 initial scala tympani (ST) insertions without dislocation. Two ears showed a dislocated array, one at 77° and the other at 163°. Three arrays were inserted into scala vestibuli (SV) via cochleostomy. These patients showed no signs of obliteration. Cochlear morphology showed no influence on angular insertion depth and scalar position. CONCLUSIONS The SMA showed a very low rate of scalar dislocations due to its slim electrode array design (2.7%). We could find a learning curve regarding the handling and the risk of dislocation and tip fold over with this electrode array. The rate of intraoperative tip fold over detection via X-ray imaging was 3.7%. Therefore, we highly recommend X-ray imaging and transimpedance matrix measurements within the surgery protocol. Scala vestibuli insertions happened in patients with cochleostomy only. We could identify two specific points of dislocation depending on electrode array design.
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Affiliation(s)
- R Beck
- Faculty of Medicine, Department of Otorhinolaryngology, Medical Center - University of Freiburg, University of Freiburg, Freiburg, Germany
| | - A Aschendorff
- Faculty of Medicine, Department of Otorhinolaryngology, Medical Center - University of Freiburg, University of Freiburg, Freiburg, Germany
| | - S Arndt
- Faculty of Medicine, Department of Otorhinolaryngology, Medical Center - University of Freiburg, University of Freiburg, Freiburg, Germany
| | - T Hildenbrand
- Faculty of Medicine, Department of Otorhinolaryngology, Medical Center - University of Freiburg, University of Freiburg, Freiburg, Germany
| | - A K Rauch
- Faculty of Medicine, Department of Otorhinolaryngology, Medical Center - University of Freiburg, University of Freiburg, Freiburg, Germany
| | - M C Ketterer
- Faculty of Medicine, Department of Otorhinolaryngology, Medical Center - University of Freiburg, University of Freiburg, Freiburg, Germany.
- Department of Otorhinolaryngology - Head and Neck Surgery, University of Freiburg, Killianstrasse 5, 79106, Freiburg, Germany.
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Holzleitner N, Cwojdzinski T, Beck R, Urtz-Urban N, Hillhouse CC, Grundler PV, van der Meulen NP, Talip Z, Ramaekers S, Van de Voorde M, Ponsard B, Casini A, Günther T. Preclinical Evaluation of Gastrin-Releasing Peptide Receptor Antagonists Labeled with 161Tb and 177Lu: A Comparative Study. J Nucl Med 2024; 65:481-484. [PMID: 38124121 PMCID: PMC10924159 DOI: 10.2967/jnumed.123.266233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 11/09/2023] [Accepted: 11/09/2023] [Indexed: 12/23/2023] Open
Abstract
To elucidate potential benefits of the Auger-electron-emitting radionuclide 161Tb, we compared the preclinical performance of the gastrin-releasing peptide receptor antagonists RM2 (DOTA-Pip5-d-Phe6-Gln7-Trp8-Ala9-Val10-Gly11-His12-Sta13-Leu14-NH2) and AMTG (α-Me-Trp8-RM2), each labeled with both 177Lu and 161Tb. Methods: 161Tb/177Lu labeling (90°C, 5 min) and cell-based experiments (PC-3 cells) were performed. In vivo stability (30 min after injection) and biodistribution studies (1-72 h after injection) were performed on PC-3 tumor-bearing CB17-SCID mice. Results: Gastrin-releasing peptide receptor affinity was high for all compounds (half-maximal inhibitory concentration [nM]: [161Tb]Tb-RM2, 2.46 ± 0.16; [161Tb]Tb-AMTG, 2.16 ± 0.09; [177Lu]Lu-RM2, 3.45 ± 0.18; [177Lu]Lu-AMTG, 3.04 ± 0.08), and 75%-84% of cell-associated activity was receptor-bound. In vivo, both AMTG analogs displayed distinctly higher stability (30 min after injection) and noticeably higher tumor retention than their RM2 counterparts. Conclusion: On the basis of preclinical results, [161Tb]Tb-/[177Lu]Lu-AMTG might reveal a higher therapeutic efficacy than [161Tb]Tb-/[177Lu]Lu-RM2, particularly [161Tb]Tb-AMTG because of additional Auger-electron emissions at the cell membrane level.
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Affiliation(s)
- Nadine Holzleitner
- Department of Chemistry, School of Natural Sciences, Technical University of Munich, Garching, Germany
| | - Tatjana Cwojdzinski
- Department of Chemistry, School of Natural Sciences, Technical University of Munich, Garching, Germany
| | - Roswitha Beck
- Department of Chemistry, School of Natural Sciences, Technical University of Munich, Garching, Germany
| | - Nicole Urtz-Urban
- Department of Chemistry, School of Natural Sciences, Technical University of Munich, Garching, Germany
| | - Colin C Hillhouse
- Center for Radiopharmaceutical Sciences ETH-PSI, Paul Scherrer Institute, Villigen, Switzerland; and
| | - Pascal V Grundler
- Center for Radiopharmaceutical Sciences ETH-PSI, Paul Scherrer Institute, Villigen, Switzerland; and
| | - Nicholas P van der Meulen
- Center for Radiopharmaceutical Sciences ETH-PSI, Paul Scherrer Institute, Villigen, Switzerland; and
| | - Zeynep Talip
- Center for Radiopharmaceutical Sciences ETH-PSI, Paul Scherrer Institute, Villigen, Switzerland; and
| | - Stijn Ramaekers
- Nuclear Medical Applications, Belgian Nuclear Research Centre, Mol, Belgium
| | | | - Bernard Ponsard
- Nuclear Medical Applications, Belgian Nuclear Research Centre, Mol, Belgium
| | - Angela Casini
- Department of Chemistry, School of Natural Sciences, Technical University of Munich, Garching, Germany;
| | - Thomas Günther
- Department of Chemistry, School of Natural Sciences, Technical University of Munich, Garching, Germany;
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Ketterer MC, Brückerhoff K, Arndt S, Beck R, Aschendorff A. [Insertion of a second electrode array-a rare complication of CI reimplantation. German version]. HNO 2024; 72:113-117. [PMID: 37845537 PMCID: PMC10827957 DOI: 10.1007/s00106-023-01363-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2023] [Indexed: 10/18/2023]
Abstract
Due to a technical defect or a medical indication, it may be necessary to explant a cochlear implant. This case report shows that there is the risk of encountering a nonremovable electrode array-as described here from the scala tympani-during cochlear reimplantation. In the present case, insertion of a second electrode array into the free and nonobstructed scala vestibuli was successful. Nonetheless, the indication for reimplantation must be carefully considered, especially in patients with tolerable limitations with little or no loss of speech understanding. Furthermore, surgery should not be performed solely because an implant upgrade is desired.
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Affiliation(s)
- M C Ketterer
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland.
| | - K Brückerhoff
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - S Arndt
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - R Beck
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - A Aschendorff
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
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8
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Günther T, Holzleitner N, Viering O, Beck R, Wienand G, Dierks A, Pfob CH, Bundschuh RA, Kircher M, Lapa C, Wester HJ. Preclinical Evaluation of Minigastrin Analogs and Proof-of-Concept [ 68Ga]Ga-DOTA-CCK-66 PET/CT in 2 Patients with Medullary Thyroid Cancer. J Nucl Med 2024; 65:33-39. [PMID: 37945383 PMCID: PMC10755518 DOI: 10.2967/jnumed.123.266537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 10/19/2023] [Indexed: 11/12/2023] Open
Abstract
Because of the need for radiolabeled theranostics for the detection and treatment of medullary thyroid cancer (MTC), and the yet unresolved stability issues of minigastrin analogs targeting the cholecystokinin-2 receptor (CCK-2R), our aim was to address in vivo stability, our motivation being to develop and evaluate DOTA-CCK-66 (DOTA-γ-glu-PEG3-Trp-(N-Me)Nle-Asp-1-Nal-NH2, PEG: polyethylene glycol) and DOTA-CCK-66.2 (DOTA-glu-PEG3-Trp-(N-Me)Nle-Asp-1-Nal-NH2), both derived from DOTA-MGS5 (DOTA-glu-Ala-Tyr-Gly-Trp-(N-Me)Nle-Asp-1-Nal-NH2), and clinically translate [68Ga]Ga-DOTA-CCK-66. Methods: 64Cu and 67Ga labeling of DOTA-CCK-66, DOTA-CCK-66.2, and DOTA-MGS5 was performed at 90°C within 15 min (1.0 M NaOAc buffer, pH 5.5, and 2.5 M 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid buffer, respectively). 177Lu labeling of these 3 compounds was performed at 90°C within 15 min (1.0 M NaOAc buffer, pH 5.5, 0.1 M sodium ascorbate). CCK-2R affinity of natGa/natCu/natLu-labeled DOTA-CCK-66, DOTA-CCK-66.2, and DOTA-MGS5 was examined on AR42J cells. The in vivo stability of 177Lu-labeled DOTA-CCK-66 and DOTA-MGS5 was examined at 30 min after injection in CB17-SCID mice. Biodistribution studies at 1 h ([67Ga]Ga-DOTA-CCK-66) and 24 h ([177Lu]Lu-DOTA-CCK-66/DOTA-MGS5) after injection were performed on AR42J tumor-bearing CB17-SCID mice. In a translation to the human setting, [68Ga]Ga-DOTA-CCK-66 was administered and whole-body PET/CT was acquired at 120 min after injection in 2 MTC patients. Results: Irrespective of the metal or radiometal used (copper, gallium, lutetium), high CCK-2R affinity (half-maximal inhibitory concentration, 3.6-6.0 nM) and favorable lipophilicity were determined. In vivo, increased numbers of intact peptide were found for [177Lu]Lu-DOTA-CCK-66 compared with [177Lu]Lu-DOTA-MGS5 in murine urine (23.7% ± 9.2% vs. 77.8% ± 2.3%). Overall tumor-to-background ratios were similar for both 177Lu-labeled analogs. [67Ga]Ga-DOTA-CCK-66 exhibited accumulation (percentage injected dose per gram) that was high in tumor (19.4 ± 3.5) and low in off-target areas (blood, 0.61 ± 0.07; liver, 0.31 ± 0.02; pancreas, 0.23 ± 0.07; stomach, 1.81 ± 0.19; kidney, 2.51 ± 0.49) at 1 h after injection. PET/CT examination in 2 MTC patients applying [68Ga]Ga-DOTA-CCK-66 confirmed multiple metastases. Conclusion: Because of the high in vivo stability and favorable overall preclinical performance of [nat/67Ga]Ga-/[nat/177Lu]Lu-DOTA-CCK-66, a proof-of-concept clinical investigation of [68Ga]Ga-DOTA-CCK-66 was completed. As several lesions could be identified and excellent biodistribution patterns were observed, further patient studies applying [68Ga]Ga- and [177Lu]Lu-DOTA-CCK-66 are warranted.
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Affiliation(s)
- Thomas Günther
- Department of Chemistry, Chair of Pharmaceutical Radiochemistry, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany; and
| | - Nadine Holzleitner
- Department of Chemistry, Chair of Pharmaceutical Radiochemistry, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany; and
| | - Oliver Viering
- Nuclear Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany
| | - Roswitha Beck
- Department of Chemistry, Chair of Pharmaceutical Radiochemistry, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany; and
| | - Georgine Wienand
- Nuclear Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany
| | - Alexander Dierks
- Nuclear Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany
| | - Christian H Pfob
- Nuclear Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany
| | - Ralph A Bundschuh
- Nuclear Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany
| | - Malte Kircher
- Nuclear Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany
| | - Constantin Lapa
- Nuclear Medicine, Faculty of Medicine, University of Augsburg, Augsburg, Germany
| | - Hans-Jürgen Wester
- Department of Chemistry, Chair of Pharmaceutical Radiochemistry, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany; and
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Ketterer MC, Brückerhoff K, Arndt S, Beck R, Aschendorff A. Insertion of a second electrode array-a rare complication of CI reimplantation. HNO 2024; 72:63-65. [PMID: 37943372 PMCID: PMC10798908 DOI: 10.1007/s00106-023-01364-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2023] [Indexed: 11/10/2023]
Abstract
Due to a technical defect or a medical indication, it may be necessary to explant a cochlear implant. This case report shows that there is the risk of encountering a nonremovable electrode array-as described here from the scala tympani-during cochlear reimplantation. In the present case, insertion of a second electrode array into the free and nonobstructed scala vestibuli was successful. Nonetheless, the indication for reimplantation must be carefully considered, especially in patients with tolerable limitations with little or no loss of speech understanding. Furthermore, surgery should not be performed solely because an implant upgrade is desired.
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Affiliation(s)
- M C Ketterer
- Department of Otorhinolaryngology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
- Klinik für Hals- Nasen- Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Germany.
| | - K Brückerhoff
- Department of Otorhinolaryngology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - S Arndt
- Department of Otorhinolaryngology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - R Beck
- Department of Otorhinolaryngology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - A Aschendorff
- Department of Otorhinolaryngology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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Wuehr M, Eilles E, Lindner M, Grosch M, Beck R, Ziegler S, Zwergal A. Repetitive Low-Intensity Vestibular Noise Stimulation Partly Reverses Behavioral and Brain Activity Changes following Bilateral Vestibular Loss in Rats. Biomolecules 2023; 13:1580. [PMID: 38002261 PMCID: PMC10669117 DOI: 10.3390/biom13111580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/18/2023] [Accepted: 10/22/2023] [Indexed: 11/26/2023] Open
Abstract
Low-intensity noisy galvanic vestibular stimulation (nGVS) can improve static and dynamic postural deficits in patients with bilateral vestibular loss (BVL). In this study, we aimed to explore the neurophysiological and neuroanatomical substrates underlying nGVS treatment effects in a rat model of BVL. Regional brain activation patterns and behavioral responses to a repeated 30 min nGVS treatment in comparison to sham stimulation were investigated by serial whole-brain 18F-FDG-PET measurements and quantitative locomotor assessments before and at nine consecutive time points up to 60 days after the chemical bilateral labyrinthectomy (BL). The 18F-FDG-PET revealed a broad nGVS-induced modulation on regional brain activation patterns encompassing biologically plausible brain networks in the brainstem, cerebellum, multisensory cortex, and basal ganglia during the entire observation period post-BL. nGVS broadly reversed brain activity adaptions occurring in the natural course post-BL. The parallel behavioral locomotor assessment demonstrated a beneficial treatment effect of nGVS on sensory-ataxic gait alterations, particularly in the early stage of post-BL recovery. Stimulation-induced locomotor improvements were finally linked to nGVS brain activity responses in the brainstem, hemispheric motor, and limbic networks. In conclusion, combined 18F-FDG-PET and locomotor analysis discloses the potential neurophysiological and neuroanatomical substrates that mediate previously observed therapeutic nGVS effects on postural deficits in patients with BVL.
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Affiliation(s)
- Max Wuehr
- German Center for Vertigo and Balance Disorders (DSGZ), LMU University Hospital, LMU Munich, 81377 Munich, Germany; (M.W.); (E.E.); (M.L.); (M.G.); (R.B.)
| | - Eva Eilles
- German Center for Vertigo and Balance Disorders (DSGZ), LMU University Hospital, LMU Munich, 81377 Munich, Germany; (M.W.); (E.E.); (M.L.); (M.G.); (R.B.)
| | - Magdalena Lindner
- German Center for Vertigo and Balance Disorders (DSGZ), LMU University Hospital, LMU Munich, 81377 Munich, Germany; (M.W.); (E.E.); (M.L.); (M.G.); (R.B.)
| | - Maximilian Grosch
- German Center for Vertigo and Balance Disorders (DSGZ), LMU University Hospital, LMU Munich, 81377 Munich, Germany; (M.W.); (E.E.); (M.L.); (M.G.); (R.B.)
| | - Roswitha Beck
- German Center for Vertigo and Balance Disorders (DSGZ), LMU University Hospital, LMU Munich, 81377 Munich, Germany; (M.W.); (E.E.); (M.L.); (M.G.); (R.B.)
- Pharmaceutical Radiochemistry, TUM School of Natural Sciences, TU Munich, 85748 Garching, Germany
| | - Sibylle Ziegler
- Department of Nuclear Medicine, LMU University Hospital, LMU Munich, 81377 Munich, Germany;
| | - Andreas Zwergal
- German Center for Vertigo and Balance Disorders (DSGZ), LMU University Hospital, LMU Munich, 81377 Munich, Germany; (M.W.); (E.E.); (M.L.); (M.G.); (R.B.)
- Department of Neurology, LMU University Hospital, LMU Munich, 81377 Munich, Germany
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11
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Jermann N, Krusche B, Metag V, Afzal F, Badea M, Beck R, Bielefeldt P, Bieling J, Biroth M, Blanke E, Borisov N, Bornstein M, Brinkmann KT, Ciupka S, Crede V, Dolzhikov A, Drexler P, Dutz H, Elsner D, Fedorov A, Frommberger F, Gardner S, Ghosal D, Goertz S, Gorodnov I, Grüner M, Hammann C, Hartmann J, Hillert W, Hoffmeister P, Honisch C, Jude TC, Kalischewski F, Ketzer B, Klassen P, Klein F, Klempt E, Knaust J, Kolanus N, Kreit J, Krönert P, Lang M, Lazarev AB, Livingston K, Lutterer S, Mahlberg P, Meier C, Meyer W, Mitlasoczki B, Müllers J, Nanova M, Neganov A, Nikonov K, Noël JF, Ostrick M, Ottnad J, Otto B, Penman G, Poller T, Proft D, Reicherz G, Reinartz N, Richter L, Runkel S, Salisbury B, Sarantsev AV, Schaab D, Schmidt C, Schmieden H, Schultes J, Seifen T, Spieker K, Stausberg N, Steinacher M, Taubert F, Thiel A, Thoma U, Thomas A, Urban M, Urff G, Usov Y, van Pee H, Wang YC, Wendel C, Wiedner U, Wunderlich Y. Measurement of polarization observables T, P, and H in π0 and η photoproduction off quasi-free nucleons. Eur Phys J A Hadron Nucl 2023; 59:232. [PMID: 37860634 PMCID: PMC10582157 DOI: 10.1140/epja/s10050-023-01134-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 09/21/2023] [Indexed: 10/21/2023]
Abstract
The target asymmetry T, recoil asymmetry P, and beam-target double polarization observable H were determined in exclusive π 0 and η photoproduction off quasi-free protons and, for the first time, off quasi-free neutrons. The experiment was performed at the electron stretcher accelerator ELSA in Bonn, Germany, with the Crystal Barrel/TAPS detector setup, using a linearly polarized photon beam and a transversely polarized deuterated butanol target. Effects from the Fermi motion of the nucleons within deuterium were removed by a full kinematic reconstruction of the final state invariant mass. A comparison of the data obtained on the proton and on the neutron provides new insight into the isospin structure of the electromagnetic excitation of the nucleon. Earlier measurements of polarization observables in the γ p → π 0 p and γ p → η p reactions are confirmed. The data obtained on the neutron are of particular relevance for clarifying the origin of the narrow structure in the η n system at W = 1.68 GeV . A comparison with recent partial wave analyses favors the interpretation of this structure as arising from interference of the S 11 ( 1535 ) and S 11 ( 1650 ) resonances within the S 11 -partial wave.
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Affiliation(s)
- N. Jermann
- Department of Physics, University of Basel, Basel, Switzerland
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - B. Krusche
- Department of Physics, University of Basel, Basel, Switzerland
| | - V. Metag
- II. Physikalisches Institut, University of Giessen, Giessen, Germany
| | - F. Afzal
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - M. Badea
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - R. Beck
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - P. Bielefeldt
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - J. Bieling
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - M. Biroth
- Institut für Kernphysik, University of Mainz, Mainz, Germany
| | - E. Blanke
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - N. Borisov
- Joint Institute for Nuclear Research, Dubna, Russia
| | - M. Bornstein
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - K.-T. Brinkmann
- II. Physikalisches Institut, University of Giessen, Giessen, Germany
| | - S. Ciupka
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - V. Crede
- Department of Physics, Florida State University, Tallahassee, USA
| | - A. Dolzhikov
- Joint Institute for Nuclear Research, Dubna, Russia
| | - P. Drexler
- Institut für Kernphysik, University of Mainz, Mainz, Germany
| | - H. Dutz
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - D. Elsner
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - A. Fedorov
- Joint Institute for Nuclear Research, Dubna, Russia
| | - F. Frommberger
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - S. Gardner
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, UK
| | - D. Ghosal
- Department of Physics, University of Basel, Basel, Switzerland
- Present Address: resent address: University of Liverpool, Liverpool, UK
| | - S. Goertz
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - I. Gorodnov
- Joint Institute for Nuclear Research, Dubna, Russia
| | - M. Grüner
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - C. Hammann
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - J. Hartmann
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - W. Hillert
- Physikalisches Institut, University of Bonn, Bonn, Germany
- Present Address: resent address: University of Hamburg, Hamburg, Germany
| | - P. Hoffmeister
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - C. Honisch
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - T. C. Jude
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - F. Kalischewski
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - B. Ketzer
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - P. Klassen
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - F. Klein
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - E. Klempt
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - J. Knaust
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - N. Kolanus
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - J. Kreit
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - P. Krönert
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - M. Lang
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | | | - K. Livingston
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, UK
| | - S. Lutterer
- Department of Physics, University of Basel, Basel, Switzerland
- Present Address: resent address: Ruhr University Bochum, Bochum, Germany
| | - P. Mahlberg
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - C. Meier
- Department of Physics, University of Basel, Basel, Switzerland
| | - W. Meyer
- Institut für Experimentalphysik I, Ruhr University Bochum, Bochum, Germany
| | - B. Mitlasoczki
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - J. Müllers
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - M. Nanova
- II. Physikalisches Institut, University of Giessen, Giessen, Germany
| | - A. Neganov
- Joint Institute for Nuclear Research, Dubna, Russia
| | - K. Nikonov
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - J. F. Noël
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - M. Ostrick
- Institut für Kernphysik, University of Mainz, Mainz, Germany
| | - J. Ottnad
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - B. Otto
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - G. Penman
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, UK
| | - T. Poller
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - D. Proft
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - G. Reicherz
- Institut für Experimentalphysik I, Ruhr University Bochum, Bochum, Germany
| | - N. Reinartz
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - L. Richter
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - S. Runkel
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - B. Salisbury
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - A. V. Sarantsev
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - D. Schaab
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - C. Schmidt
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - H. Schmieden
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - J. Schultes
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - T. Seifen
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - K. Spieker
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - N. Stausberg
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - M. Steinacher
- Department of Physics, University of Basel, Basel, Switzerland
| | - F. Taubert
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - A. Thiel
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - U. Thoma
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - A. Thomas
- Institut für Kernphysik, University of Mainz, Mainz, Germany
| | - M. Urban
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - G. Urff
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - Y. Usov
- Joint Institute for Nuclear Research, Dubna, Russia
| | - H. van Pee
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - Y. C. Wang
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - C. Wendel
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - U. Wiedner
- Institut für Experimentalphysik I, Ruhr University Bochum, Bochum, Germany
| | - Y. Wunderlich
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
| | - CBELSA/TAPS Collaboration
- Department of Physics, University of Basel, Basel, Switzerland
- Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, Bonn, Germany
- II. Physikalisches Institut, University of Giessen, Giessen, Germany
- Institut für Kernphysik, University of Mainz, Mainz, Germany
- Joint Institute for Nuclear Research, Dubna, Russia
- Department of Physics, Florida State University, Tallahassee, USA
- Physikalisches Institut, University of Bonn, Bonn, Germany
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, UK
- Institut für Experimentalphysik I, Ruhr University Bochum, Bochum, Germany
- Present Address: resent address: University of Liverpool, Liverpool, UK
- Present Address: resent address: University of Hamburg, Hamburg, Germany
- Present Address: resent address: Ruhr University Bochum, Bochum, Germany
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Koller L, Joksch M, Schwarzenböck S, Kurth J, Heuschkel M, Holzleitner N, Beck R, von Amsberg G, Wester HJ, Krause BJ, Günther T. Preclinical Comparison of the 64Cu- and 68Ga-Labeled GRPR-Targeted Compounds RM2 and AMTG, as Well as First-in-Humans [ 68Ga]Ga-AMTG PET/CT. J Nucl Med 2023; 64:1654-1659. [PMID: 37934025 PMCID: PMC10586479 DOI: 10.2967/jnumed.123.265771] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 06/12/2023] [Indexed: 07/22/2023] Open
Abstract
Despite the recent success of prostate-specific membrane antigen (PSMA)-targeted compounds for theranostic use in prostate cancer (PCa), alternative options for the detection and treatment of PSMA-negative lesions are needed. We have recently developed a novel gastrin-releasing peptide receptor (GRPR) ligand with improved metabolic stability, which might improve diagnostic and therapeutic efficacy and could be valuable for PSMA-negative PCa patients. Our aim was to examine its suitability for theranostic use. We performed a comparative preclinical study on [64Cu]Cu-/[68Ga]Ga-AMTG ([64Cu]Cu-/[68Ga]Ga-α-Me-l-Trp8-RM2) using [64Cu]Cu-/[68Ga]Ga-RM2 ([64Cu]Cu-/[68Ga]Ga-DOTA-Pip5-Phe6-Gln7-Trp8-Ala9-Val10-Gly11-His12-Sta13-Leu14-NH2) as a reference compound and investigated [68Ga]Ga-AMTG in a proof-of-concept study in a PCa patient. Methods: Peptides were labeled with 64Cu (80 °C, 1.0 M NaOAc, pH 5.50) and 68Ga (90 °C, 0.25 M NaOAc, pH 4.50). GRPR affinity (half-maximal inhibitory concentration, room temperature, 2 h) and GRPR-mediated internalization (37 °C, 60 min) were examined on PC-3 cells. Biodistribution studies were performed at 1 h after injection in PC-3 tumor-bearing mice. For a first-in-humans application, 173 MBq of [68Ga]Ga-AMTG were administered intravenously and whole-body PET/CT scans were acquired at 75 min after injection. Results: 64Cu- and 68Ga-labeling proceeded almost quantitatively (>98%). All compounds revealed similarly high GRPR affinity (half-maximal inhibitory concentration, 1.5-4.0 nM) and high receptor-bound fractions (79%-84% of cell-associated activity). In vivo, high activity levels (percentage injected dose per gram) were found in the PC-3 tumor (14.1-15.1 %ID/g) and the pancreas (12.6-30.7 %ID/g), whereas further off-target accumulation was low at 1 h after injection, except for elevated liver uptake observed for both 64Cu-labeled compounds. Overall biodistribution profiles and tumor-to-background ratios were comparable but slightly enhanced for the 68Ga-labeled analogs in most organs. [68Ga]Ga-AMTG confirmed the favorable pharmacokinetics-as evident from preclinical studies-in a patient with metastasized castration-resistant PCa showing intense uptake in several lesions. Conclusion: AMTG is eligible for theranostic use, as labeling with 64Cu and 68Ga, as well as 177Lu (known from previous study), does not have a negative influence on its favorable biodistribution pattern. For this reason, further clinical evaluation is warranted.
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Affiliation(s)
- Lena Koller
- Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Markus Joksch
- Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany; and
| | - Sarah Schwarzenböck
- Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany; and
| | - Jens Kurth
- Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany; and
| | - Martin Heuschkel
- Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany; and
| | - Nadine Holzleitner
- Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Roswitha Beck
- Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Gunhild von Amsberg
- Department of Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hans-Jürgen Wester
- Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Bernd Joachim Krause
- Department of Nuclear Medicine, Rostock University Medical Center, Rostock, Germany; and
| | - Thomas Günther
- Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany;
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Antons M, Lindner M, Eilles E, Günther L, Delker A, Branner C, Krämer A, Beck R, Oos R, Wuehr M, Ziegler S, Strupp M, Zwergal A. Dose- and application route-dependent effects of betahistine on behavioral recovery and neuroplasticity after acute unilateral labyrinthectomy in rats. Front Neurol 2023; 14:1175481. [PMID: 37538257 PMCID: PMC10395078 DOI: 10.3389/fneur.2023.1175481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 06/28/2023] [Indexed: 08/05/2023] Open
Abstract
Introduction Betahistine is widely used for the treatment of various vestibular disorders. However, the approved oral administration route and maximum daily dose are evidently not effective in clinical trials, possibly due to a major first-pass metabolism by monoamine oxidases (MAOs). The current study aimed to test different application routes (i.v./s.c./p.o.), doses, and concurrent medication (with the MAO-B inhibitor selegiline) for their effects on behavioral recovery and cerebral target engagement following unilateral labyrinthectomy (UL) in rats. Methods Sixty rats were subjected to UL by transtympanic injection of bupivacaine/arsanilic acid and assigned to five treatment groups: i.v. low-dose betahistine (1 mg/kg bid), i.v. high-dose betahistine (10 mg/kg bid), p.o. betahistine (1 mg/kg bid)/selegiline (1 mg/kg once daily), s.c. betahistine (continuous release of 4.8 mg/day), and i.v. normal saline bid (sham treatment; days 1-3 post-UL), respectively. Behavioral testing of postural asymmetry, nystagmus, and mobility in an open field was performed seven times until day 30 post-UL and paralleled by sequential cerebral [18F]-FDG-μPET measurements. Results The therapeutic effects of betahistine after UL differed in extent and time course and were dependent on the dose, application route, and selegiline co-medication: Postural asymmetry was significantly reduced on 2-3 days post-UL by i.v. high-dose and s.c. betahistine only. No changes were observed in the intensity of nystagmus across groups. When compared to sham treatment, movement distance in the open field increased up to 5-fold from 2 to 30 days post-UL in the s.c., i.v. high-dose, and p.o. betahistine/selegiline groups. [18F]-FDG-μPET showed a dose-dependent rCGM increase in the ipsilesional vestibular nucleus until day 3 post-UL for i.v. high- vs. low-dose betahistine and sham treatment, as well as for p.o. betahistine/selegiline and s.c. betahistine vs. sham treatment. From 1 to 30 days post-UL, rCGM increased in the thalamus bilaterally for i.v. high-dose betahistine, s.c. betahistine, and p.o. betahistine/selegiline vs. saline treatment. Discussion Betahistine has the potential to augment the recovery of dynamic deficits after UL if the administration protocol is optimized toward higher effective plasma levels. This may be achieved by higher doses, inhibition of MAO-based metabolism, or a parenteral route. In vivo imaging suggests a drug-target engagement in central vestibular networks.
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Affiliation(s)
- Melissa Antons
- German Center for Vertigo and Balance Disorders, DSGZ, LMU University Hospital, LMU Munich, Munich, Germany
| | - Magdalena Lindner
- German Center for Vertigo and Balance Disorders, DSGZ, LMU University Hospital, LMU Munich, Munich, Germany
- Department of Nuclear Medicine, LMU University Hospital, LMU Munich, Munich, Germany
| | - Eva Eilles
- German Center for Vertigo and Balance Disorders, DSGZ, LMU University Hospital, LMU Munich, Munich, Germany
| | - Lisa Günther
- German Center for Vertigo and Balance Disorders, DSGZ, LMU University Hospital, LMU Munich, Munich, Germany
| | - Astrid Delker
- Department of Nuclear Medicine, LMU University Hospital, LMU Munich, Munich, Germany
| | - Christina Branner
- German Center for Vertigo and Balance Disorders, DSGZ, LMU University Hospital, LMU Munich, Munich, Germany
| | - Anja Krämer
- German Center for Vertigo and Balance Disorders, DSGZ, LMU University Hospital, LMU Munich, Munich, Germany
| | - Roswitha Beck
- German Center for Vertigo and Balance Disorders, DSGZ, LMU University Hospital, LMU Munich, Munich, Germany
| | - Rosel Oos
- Department of Nuclear Medicine, LMU University Hospital, LMU Munich, Munich, Germany
| | - Max Wuehr
- German Center for Vertigo and Balance Disorders, DSGZ, LMU University Hospital, LMU Munich, Munich, Germany
| | - Sibylle Ziegler
- Department of Nuclear Medicine, LMU University Hospital, LMU Munich, Munich, Germany
| | - Michael Strupp
- German Center for Vertigo and Balance Disorders, DSGZ, LMU University Hospital, LMU Munich, Munich, Germany
- Department of Neurology, LMU University Hospital, LMU Munich, Munich, Germany
| | - Andreas Zwergal
- German Center for Vertigo and Balance Disorders, DSGZ, LMU University Hospital, LMU Munich, Munich, Germany
- Department of Neurology, LMU University Hospital, LMU Munich, Munich, Germany
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Kunert JP, Müller M, Günther T, Stopper L, Urtz-Urban N, Beck R, Wester HJ. Synthesis and preclinical evaluation of novel 99mTc-labeled PSMA ligands for radioguided surgery of prostate cancer. EJNMMI Res 2023; 13:2. [PMID: 36645586 PMCID: PMC9842843 DOI: 10.1186/s13550-022-00942-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/15/2022] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Radioguided surgery (RGS) has recently emerged as a valuable new tool in the management of recurrent prostate cancer (PCa). After preoperative injection of a 99mTc-labeled prostate-specific membrane antigen (PSMA) inhibitor, radioguided intraoperative identification and resection of lesions is facilitated by means of suitable γ-probes. First clinical experiences show the feasibility of RGS and suggest superiority over conventional lymph node dissection in recurrent PCa. However, commonly used [99mTc]Tc-PSMA-I&S exhibits slow whole-body clearance, thus hampering optimal tumor-to-background ratios (TBR) during surgery. We therefore aimed to develop novel 99mTc-labeled, PSMA-targeted radioligands with optimized pharmacokinetic profile to increase TBR at the time of surgery. METHODS Three 99mTc-labeled N4-PSMA ligands were preclinically evaluated and compared to [99mTc]Tc-PSMA-I&S. PSMA affinity (IC50) and internalization were determined on LNCaP cells. Lipophilicity was assessed by means of the distribution coefficient logD7.4 and an ultrafiltration method was used to determine binding to human plasma proteins. Biodistribution studies and static µSPECT/CT-imaging were performed at 6 h p.i. on LNCaP tumor-bearing CB17-SCID mice. RESULTS The novel N4-PSMA tracers were readily labeled with [99mTc]TcO4- with RCP > 95%. Comparable and high PSMA affinity was observed for all [99mTc]Tc-N4-PSMA-ligands. The ligands showed variable binding to human plasma and medium to low lipophilicity (logD7.4 - 2.6 to - 3.4), both consistently decreased compared to [99mTc]Tc-PSMA-I&S. Biodistribution studies revealed comparable tumor uptake among all [99mTc]Tc-N4-PSMA-ligands and [99mTc]Tc-PSMA-I&S, while clearance from most organs was superior for the novel tracers. Accordingly, increased TBR were achieved. [99mTc]Tc-N4-PSMA-12 showed higher TBR than [99mTc]Tc-PSMA-I&S for blood and all evaluated tissue. In addition, a procedure suitable for routine clinical production of [99mTc]Tc-N4-PSMA-12 was established. Labeling with 553 ± 187 MBq was achieved with RCP of 98.5 ± 0.6% (n = 10). CONCLUSION High tumor accumulation and favorable clearance from blood and non-target tissue make [99mTc]Tc-N4-PSMA-12 an attractive tracer for RGS, possibly superior to currently established [99mTc]Tc-PSMA-I&S. Its GMP-production according to a method presented here and first clinical investigations with this novel radioligand is highly recommended.
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Affiliation(s)
- Jan-Philip Kunert
- Chair of Pharmaceutical Radiochemistry, Department of Chemistry, Technical University of Munich (TUM), Walther-Meißner-Str 3, 85748, Garching, Germany.
| | - Max Müller
- grid.6936.a0000000123222966Chair of Pharmaceutical Radiochemistry, Department of Chemistry, Technical University of Munich (TUM), Walther-Meißner-Str 3, 85748 Garching, Germany
| | - Thomas Günther
- grid.6936.a0000000123222966Chair of Pharmaceutical Radiochemistry, Department of Chemistry, Technical University of Munich (TUM), Walther-Meißner-Str 3, 85748 Garching, Germany
| | - León Stopper
- grid.6936.a0000000123222966Chair of Pharmaceutical Radiochemistry, Department of Chemistry, Technical University of Munich (TUM), Walther-Meißner-Str 3, 85748 Garching, Germany
| | - Nicole Urtz-Urban
- grid.6936.a0000000123222966Chair of Pharmaceutical Radiochemistry, Department of Chemistry, Technical University of Munich (TUM), Walther-Meißner-Str 3, 85748 Garching, Germany
| | - Roswitha Beck
- grid.6936.a0000000123222966Chair of Pharmaceutical Radiochemistry, Department of Chemistry, Technical University of Munich (TUM), Walther-Meißner-Str 3, 85748 Garching, Germany
| | - Hans-Jürgen Wester
- grid.6936.a0000000123222966Chair of Pharmaceutical Radiochemistry, Department of Chemistry, Technical University of Munich (TUM), Walther-Meißner-Str 3, 85748 Garching, Germany
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Holzleitner N, Günther T, Beck R, Lapa C, Wester HJ. Introduction of a SiFA Moiety into the D-Glutamate Chain of DOTA-PP-F11N Results in Radiohybrid-Based CCK-2R-Targeted Compounds with Improved Pharmacokinetics In Vivo. Pharmaceuticals (Basel) 2022; 15:ph15121467. [PMID: 36558917 PMCID: PMC9783573 DOI: 10.3390/ph15121467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 11/23/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022] Open
Abstract
In order to enable 18F- and 177Lu-labelling within the same molecule, we introduced a silicon-based fluoride acceptor (SiFA) into the hexa-D-glutamate chain of DOTA-PP-F11N. In addition, minigastrin analogues with a prolonged as well as γ-linked D-glutamate chain were synthesised and evaluated. CCK-2R affinity (IC50, AR42J cells) and lipophilicity (logD7.4) were determined. Biodistribution studies at 24 h post-injection (p.i.) and µSPECT/CT imaging at 1, 4 and 24 h p.i. were carried out in AR42J tumour-bearing CB17-SCID mice. CCK-2R affinity of (R)-DOTAGA-rhCCK-1 to 18 was enhanced with increasing distance between the SiFA building block and the binding motif. Lipophilicity of [177Lu]Lu-(R)-DOTAGA-rhCCK-1 to 18 was higher compared to that of [177Lu]Lu-DOTA-PP-F11N and [177Lu]Lu-CP04. The respective α- and γ-linked rhCCK derivatives revealing the highest CCK-2R affinity were further evaluated in vivo. In comparison with [177Lu]Lu-DOTA-PP-F11N, [177Lu-]Lu-(R)-DOTAGA-rhCCK-9 and -16 exhibited three- to eight-fold increased activity levels in the tumour at 24 h p.i. However, activity levels in the kidneys were elevated as well. We could show that the introduction of a lipophilic SiFA moiety into the hydrophilic backbone of [177Lu]Lu-DOTA-PP-F11N led to a decelerated blood clearance and thus improved tumour retention. However, elevated kidney retention has to be addressed in future studies.
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Affiliation(s)
- Nadine Holzleitner
- Pharmaceutical Radiochemistry, Technical University of Munich, 85748 Garching, Germany
- Correspondence: (N.H.); (T.G.)
| | - Thomas Günther
- Pharmaceutical Radiochemistry, Technical University of Munich, 85748 Garching, Germany
- Correspondence: (N.H.); (T.G.)
| | - Roswitha Beck
- Pharmaceutical Radiochemistry, Technical University of Munich, 85748 Garching, Germany
| | - Constantin Lapa
- Nuclear Medicine, Faculty of Medicine, University of Augsburg, 86156 Augsburg, Germany
| | - Hans-Jürgen Wester
- Pharmaceutical Radiochemistry, Technical University of Munich, 85748 Garching, Germany
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Günther T, Konrad M, Stopper L, Kunert JP, Fischer S, Beck R, Casini A, Wester HJ. Optimization of the Pharmacokinetic Profile of [ 99mTc]Tc-N 4-Bombesin Derivatives by Modification of the Pharmacophoric Gln-Trp Sequence. Pharmaceuticals (Basel) 2022; 15:ph15091133. [PMID: 36145354 PMCID: PMC9500665 DOI: 10.3390/ph15091133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/06/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
Current radiolabeled gastrin-releasing peptide receptor (GRPR) ligands usually suffer from high accumulation in GRPR-positive organs (pancreas, stomach), limiting tumor-to-background contrast in the abdomen. In novel N4-bombesin derivatives this was addressed by substitutions at the Gln7-Trp8 site within the MJ9 peptide (H-Pip5-phe6-Gln7-Trp8-Ala9-Val10-Gly11-His12-Sta13-Leu14-NH2) either by homoserine (Hse7), β-(3-benzothienyl) alanine (Bta8) or α-methyl tryptophan (α-Me-Trp8), with the aim of optimizing pharmacokinetics. We prepared and characterized the peptide conjugates 6-carboxy-1,4,8,11-tetraazaundecane (N4)-asp-MJ9, N4-asp-[Bta8]MJ9, N4-[Hse7]MJ9 and N4-[α-Me-Trp8]MJ9, and evaluated these compounds in vitro (GRPR affinity via IC50,inverse; internalization; lipophilicity via logD7.4) and in vivo (biodistribution and μSPECT/CT studies at 1 h post injection (p.i.) in PC-3 tumor-bearing CB17-SCID mice). 99mTc-labeling resulted in radiochemical yields (RCYs) > 95%. All 99mTc-labeled MJ9 analogues showed comparable or higher GRPR affinity than the external reference [99mTc]Tc-Demobesin 4. Receptor-bound fractions were noticeably higher than that of the reference. Despite a slightly enhanced lipophilicity, all novel MJ9 derivatives revealed improved in vivo pharmacokinetics compared to the reference. The Bta8-modified ligand revealed the most favorable tumor-to-abdomen contrast at 1 h p.i. Substitutions at the Gln7-Trp8 site within GRPR ligands hold great potential to modify pharmacokinetics for improved imaging.
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Günther T, Deiser S, Felber V, Beck R, Wester HJ. Substitution of l-Tryptophan by α-Methyl-l-Tryptophan in 177Lu-RM2 Results in 177Lu-AMTG, a High-Affinity Gastrin-Releasing Peptide Receptor Ligand with Improved In Vivo Stability. J Nucl Med 2022; 63:1364-1370. [PMID: 35027371 PMCID: PMC9454457 DOI: 10.2967/jnumed.121.263323] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/28/2021] [Indexed: 01/26/2023] Open
Abstract
Theranostic applications targeting the gastrin-releasing peptide receptor (GRPR) have shown promising results. When compared with other peptide ligands for radioligand therapy, the most often used GRPR ligand, DOTA-Pip5-d-Phe6-Gln7-Trp8-Ala9-Val10-Gly11-His12-Sta13-Leu14-NH2 (RM2), may be clinically impacted by limited metabolic stability. With the aim of improving the metabolic stability of RM2, we investigated whether the metabolically unstable Gln7-Trp8 bond within the pharmacophore of RM2 can be stabilized via substitution of l-Trp8 by α-methyl-l-tryptophan (α-Me-l-Trp) and whether the corresponding DOTAGA analog might also be advantageous. A comparative preclinical evaluation of 177Lu-α-Me-l-Trp8-RM2 (177Lu-AMTG) and its DOTAGA counterpart (177Lu-AMTG2) was performed using 177Lu-RM2 and 177Lu-NeoBOMB1 as reference compounds. Methods: Peptides were synthesized by solid-phase peptide synthesis and labeled with 177Lu. Lipophilicity was determined at pH 7.4 (logD 7.4). Receptor-mediated internalization was investigated on PC-3 cells (37°C, 60 min), whereas GRPR affinity (half-maximal inhibitory concentration) was determined on both PC-3 and T-47D cells. Stability toward peptidases was examined in vitro (human plasma, 37°C, 72 ± 2 h) and in vivo (murine plasma, 30 min after injection). Biodistribution studies were performed at 24 h after injection, and small-animal SPECT/CT was performed on PC-3 tumor-bearing mice at 1, 4, 8, 24, and 28 h after injection. Results: Solid-phase peptide synthesis yielded 9%-15% purified labeling precursors. 177Lu labeling proceeded quantitatively. Compared with 177Lu-RM2, 177Lu-AMTG showed slightly improved GRPR affinity, a similar low internalization rate, slightly increased lipophilicity, and considerably improved stability in vitro and in vivo. In vivo, 177Lu-AMTG exhibited the highest tumor retention (11.45 ± 0.43 percentage injected dose/g) and tumor-to-blood ratio (2,702 ± 321) at 24 h after injection, as well as a favorable biodistribution profile. As demonstrated by small-animal SPECT/CT imaging, 177Lu-AMTG also revealed a less rapid clearance from tumor tissue. Compared with 177Lu-AMTG, 177Lu-AMTG2 did not show any further benefits. Conclusion: The results of this study, particularly the superior metabolic stability of 177Lu-AMTG, strongly recommend a clinical evaluation of this novel GRPR-targeted ligand to investigate its potential for radioligand therapy of GRPR-expressing malignancies.
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Affiliation(s)
- Thomas Günther
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Sandra Deiser
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Veronika Felber
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Roswitha Beck
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
| | - Hans-Jürgen Wester
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany
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Mornacchi E, Martel PP, Abt S, Achenbach P, Adlarson P, Afzal F, Ahmed Z, Annand JRM, Arends HJ, Bashkanov M, Beck R, Biroth M, Borisov N, Braghieri A, Briscoe WJ, Cividini F, Collicott C, Costanza S, Denig A, Dolzhikov AS, Downie EJ, Drexler P, Fegan S, Gardner S, Ghosal D, Glazier DI, Gorodnov I, Gradl W, Günther M, Gurevich D, Heijkenskjöld L, Hornidge D, Huber GM, Käser A, Kashevarov VL, Kay SJD, Korolija M, Krusche B, Lazarev A, Livingston K, Lutterer S, MacGregor IJD, Manley DM, Miskimen R, Mocanu M, Mullen C, Neganov A, Neiser A, Ostrick M, Paudyal D, Pedroni P, Powell A, Rostomyan T, Sokhoyan V, Spieker K, Steffen O, Strakovsky I, Strub T, Thiel M, Thomas A, Usov YA, Wagner S, Watts DP, Werthmüller D, Wettig J, Wolfes M, Zachariou N. Measurement of Compton Scattering at MAMI for the Extraction of the Electric and Magnetic Polarizabilities of the Proton. Phys Rev Lett 2022; 128:132503. [PMID: 35426697 DOI: 10.1103/physrevlett.128.132503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/31/2022] [Accepted: 02/25/2022] [Indexed: 06/14/2023]
Abstract
A precise measurement of the differential cross sections dσ/dΩ and the linearly polarized photon beam asymmetry Σ_{3} for Compton scattering on the proton below pion threshold has been performed with a tagged photon beam and almost 4π detector at the Mainz Microtron. The incident photons were produced by the recently upgraded Glasgow-Mainz photon tagging facility and impinged on a cryogenic liquid hydrogen target, with the scattered photons detected in the Crystal Ball/TAPS setup. Using the highest statistics Compton scattering data ever measured on the proton along with two effective field theories (both covariant baryon and heavy-baryon) and one fixed-t dispersion relation model, constraining the fits with the Baldin sum rule, we have obtained the proton electric and magnetic polarizabilities with unprecedented precision: α_{E1}=10.99±0.16±0.47±0.17±0.34, β_{M1}=3.14±0.21±0.24±0.20±0.35; in units of 10^{-4} fm^{3} where the errors are statistical, systematic, spin polarizability dependent, and model dependent.
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Affiliation(s)
- E Mornacchi
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - P P Martel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
- Mount Allison University, Sackville, New Brunswick E4L 1E6, Canada
| | - S Abt
- Departement für Physik, Universität Basel, CH-4056 Basel, Switzerland
| | - P Achenbach
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - P Adlarson
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - F Afzal
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, D-53115 Bonn, Germany
| | - Z Ahmed
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - J R M Annand
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - H J Arends
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Bashkanov
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
| | - R Beck
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, D-53115 Bonn, Germany
| | - M Biroth
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - N Borisov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | | | - W J Briscoe
- The George Washington University, Washington, D.C. 20052-0001, USA
| | - F Cividini
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - C Collicott
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Costanza
- INFN Sezione di Pavia, I-27100 Pavia, Italy
| | - A Denig
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A S Dolzhikov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - E J Downie
- The George Washington University, Washington, D.C. 20052-0001, USA
| | - P Drexler
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - S Fegan
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
| | - S Gardner
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - D Ghosal
- Departement für Physik, Universität Basel, CH-4056 Basel, Switzerland
| | - D I Glazier
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - I Gorodnov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - W Gradl
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Günther
- Departement für Physik, Universität Basel, CH-4056 Basel, Switzerland
| | - D Gurevich
- Institute for Nuclear Research, 125047 Moscow, Russia
| | - L Heijkenskjöld
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - D Hornidge
- Mount Allison University, Sackville, New Brunswick E4L 1E6, Canada
| | - G M Huber
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - A Käser
- Departement für Physik, Universität Basel, CH-4056 Basel, Switzerland
| | - V L Kashevarov
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - S J D Kay
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - M Korolija
- Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia
| | - B Krusche
- Departement für Physik, Universität Basel, CH-4056 Basel, Switzerland
| | - A Lazarev
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - K Livingston
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - S Lutterer
- Departement für Physik, Universität Basel, CH-4056 Basel, Switzerland
| | - I J D MacGregor
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - D M Manley
- Kent State University, Kent, Ohio 44242-0001, USA
| | - R Miskimen
- University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - M Mocanu
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
| | - C Mullen
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - A Neganov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - A Neiser
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Ostrick
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - D Paudyal
- University of Regina, Regina, Saskatchewan S4S 0A2, Canada
| | - P Pedroni
- INFN Sezione di Pavia, I-27100 Pavia, Italy
| | - A Powell
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - T Rostomyan
- Departement für Physik, Universität Basel, CH-4056 Basel, Switzerland
| | - V Sokhoyan
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - K Spieker
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, D-53115 Bonn, Germany
| | - O Steffen
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - I Strakovsky
- The George Washington University, Washington, D.C. 20052-0001, USA
| | - T Strub
- Departement für Physik, Universität Basel, CH-4056 Basel, Switzerland
| | - M Thiel
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - A Thomas
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - Yu A Usov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - S Wagner
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - D P Watts
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
| | - D Werthmüller
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
| | - J Wettig
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - M Wolfes
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
| | - N Zachariou
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
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Wurzer A, Kunert JP, Fischer S, Felber V, Beck R, De Rose F, D'Alessandria C, Weber WA, Wester HJ. Synthesis and Preclinical Evaluation of 177Lu-labeled Radiohybrid PSMA Ligands (rhPSMAs) for Endoradiotherapy of Prostate Cancer. J Nucl Med 2022; 63:1489-1495. [PMID: 35086894 PMCID: PMC9536713 DOI: 10.2967/jnumed.121.263371] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 01/18/2022] [Indexed: 11/16/2022] Open
Abstract
INTRODUCTION The prostate-specific membrane antigen (PSMA)-targeted radiohybrid (rh) ligand [177Lu]Lu-rhPSMA-7.3 has recently been assessed in a pretherapeutic dosimetry study in prostate cancer patients. In comparison to [177Lu]Lu-PSMA I&T, application of [177Lu]Lu-rhPSMA-7.3 resulted in a significantly improved tumor dose, but also higher kidney accumulation. AIM Although rhPSMA-7.3 has been initially selected as the lead compound for diagnostic application based on the characterization of its gallium complex, a systematic comparison of the most promising 177Lu-labeled rhPSMA ligands is still missing. Thus, this study aimed to identify the rhPSMA ligand with most favorable pharmacokinetics for 177Lu-radioligand therapy. Methods: The four isomers of [177Lu]Lu-rhPSMA-7 (namely [177Lu]Lu-rhPSMA-7.1, -7.2, -7.3 and -7.4), along with the novel radiohybrid ligands [177Lu]Lu-rhPSMA-10.1 and -10.2, were compared to the state-of-the-art compounds [177Lu]Lu-PSMA I&T and [177Lu]Lu-PSMA-617. The comparative evaluation comprised affinity studies (IC50) and internalization experiments on LNCaP cells, as well as lipophilicity measurements. In addition, we determined the apparent molecular weight (AMW) of each tracer as a parameter for human serum albumin (HSA) binding. Biodistribution studies and µSPECT imaging was performed in LNCaP-tumor bearing mice at 24 h post injection. Results: 177Lu-labeling of the radiohybrids was carried out according to the established procedures for the currently established PSMA-targeted ligands. All ligands showed potent binding to PSMA-expressing LNCaP cells, with affinities in the low nanomolar range and high internalization rates. Surprisingly, most pronounced differences were identified regarding the HSA-related AMW. While [177Lu]Lu-rhPSMA-7 isomers demonstrated the highest AMW and thus strongest HSA-interactions, [177Lu]Lu-rhPSMA-10.1 showed an AMW lower than [177Lu]Lu-rhPSMA-7.3 but higher than the 177Lu-labeled references PSMA I&T and PSMA-617. In biodistribution studies [177Lu]Lu-rhPSMA-10.1 exhibited the lowest kidney uptake and fastest excretion from the blood pool of all rhPSMA ligands, while preserving a high tumor accumulation. Conclusion: Clinical investigation of [177Lu]Lu-rhPSMA-10.1 is highly warranted in order to determine if the favorable pharmacokinetics observed in mice will also result in high tumor uptake and decreased absorbed dose to kidneys and other non-target tissues in patients.
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Arulsamyn R, Beck R, Jochem C. Krankheitsspektrum und Inanspruchnahme von medizinischen Leistungen bei Geflüchteten im Ankerzentrum Regensburg im Jahr 2018. Das Gesundheitswesen 2021. [DOI: 10.1055/s-0041-1732036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- R Arulsamyn
- Institut für Epidemiologie und Präventivmedizin, Fakultät für Medizin der Universität Regensburg
| | - R Beck
- Ärztlicher Leiter des Ankerzentrums Regensburg, Ankerzentrum Regensburg
| | - C Jochem
- Institut für Epidemiologie und Präventivmedizin, Fakultät für Medizin der Universität Regensburg
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21
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Alexeev GD, Alexeev MG, Amoroso A, Andrieux V, Anosov V, Antoshkin A, Augsten K, Augustyniak W, Azevedo CDR, Badełek B, Balestra F, Ball M, Barth J, Beck R, Bedfer Y, Berenguer Antequera J, Bernhard J, Bodlak M, Bradamante F, Bressan A, Burtsev VE, Chang WC, Chatterjee C, Chiosso M, Chumakov AG, Chung SU, Cicuttin A, Correia PMM, Crespo ML, D'Ago D, Dalla Torre S, Dasgupta SS, Dasgupta S, Denisenko I, Denisov OY, Donskov SV, Doshita N, Dreisbach C, Dünnweber W, Dusaev RR, Efremov A, Eversheim PD, Faccioli P, Faessler M, Finger M, Finger M, Fischer H, Franco C, Friedrich JM, Frolov V, Gautheron F, Gavrichtchouk OP, Gerassimov S, Giarra J, Gnesi I, Gorzellik M, Grasso A, Gridin A, Grosse Perdekamp M, Grube B, Guskov A, von Harrach D, Heitz R, Herrmann F, Horikawa N, d'Hose N, Hsieh CY, Huber S, Ishimoto S, Ivanov A, Iwata T, Jandek M, Jary V, Joosten R, Jörg P, Kabuß E, Kaspar F, Kerbizi A, Ketzer B, Khaustov GV, Khokhlov YA, Kisselev Y, Klein F, Koivuniemi JH, Kolosov VN, Kondo Horikawa K, Konorov I, Konstantinov VF, Kotzinian AM, Kouznetsov OM, Koval A, Kral Z, Krinner F, Kulinich Y, Kunne F, Kurek K, Kurjata RP, Kveton A, Lavickova K, Levorato S, Lian YS, Lichtenstadt J, Lin PJ, Longo R, Lyubovitskij VE, Maggiora A, Magnon A, Makins N, Makke N, Mallot GK, Maltsev A, Mamon SA, Marianski B, Martin A, Marzec J, Matoušek J, Matsuda T, Mattson G, Meshcheryakov GV, Meyer M, Meyer W, Mikhailov YV, Mikhasenko M, Mitrofanov E, Mitrofanov N, Miyachi Y, Moretti A, Nagaytsev A, Naim C, Neyret D, Nový J, Nowak WD, Nukazuka G, Nunes AS, Olshevsky AG, Ostrick M, Panzieri D, Parsamyan B, Paul S, Pekeler H, Peng JC, Pešek M, Peshekhonov DV, Pešková M, Pierre N, Platchkov S, Pochodzalla J, Polyakov VA, Pretz J, Quaresma M, Quintans C, Reicherz G, Riedl C, Rudnicki T, Ryabchikov DI, Rybnikov A, Rychter A, Samoylenko VD, Sandacz A, Sarkar S, Savin IA, Sbrizzai G, Schmieden H, Selyunin A, Sinha L, Slunecka M, Smolik J, Srnka A, Steffen D, Stolarski M, Subrt O, Sulc M, Suzuki H, Sznajder P, Tessaro S, Tessarotto F, Thiel A, Tomsa J, Tosello F, Townsend A, Tskhay V, Uhl S, Vasilishin BI, Vauth A, Veit BM, Veloso J, Ventura B, Vidon A, Virius M, Wagner M, Wallner S, Zaremba K, Zavada P, Zavertyaev M, Zemko M, Zemlyanichkina E, Zhao Y, Ziembicki M. Triangle Singularity as the Origin of the a_{1}(1420). Phys Rev Lett 2021; 127:082501. [PMID: 34477443 DOI: 10.1103/physrevlett.127.082501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 05/04/2021] [Accepted: 05/26/2021] [Indexed: 06/13/2023]
Abstract
The COMPASS Collaboration experiment recently discovered a new isovector resonancelike signal with axial-vector quantum numbers, the a_{1}(1420), decaying to f_{0}(980)π. With a mass too close to and a width smaller than the axial-vector ground state a_{1}(1260), it was immediately interpreted as a new light exotic meson, similar to the X, Y, Z states in the hidden-charm sector. We show that a resonancelike signal fully matching the experimental data is produced by the decay of the a_{1}(1260) resonance into K^{*}(→Kπ)K[over ¯] and subsequent rescattering through a triangle singularity into the coupled f_{0}(980)π channel. The amplitude for this process is calculated using a new approach based on dispersion relations. The triangle-singularity model is fitted to the partial-wave data of the COMPASS experiment. Despite having fewer parameters, this fit shows a slightly better quality than the one using a resonance hypothesis and thus eliminates the need for an additional resonance in order to describe the data. We thereby demonstrate for the first time in the light-meson sector that a resonancelike structure in the experimental data can be described by rescattering through a triangle singularity, providing evidence for a genuine three-body effect.
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Affiliation(s)
- G D Alexeev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M G Alexeev
- Department of Physics, University of Torino, 10125 Torino, Italy
- Torino Section of INFN, 10125 Torino, Italy
| | - A Amoroso
- Department of Physics, University of Torino, 10125 Torino, Italy
- Torino Section of INFN, 10125 Torino, Italy
| | - V Andrieux
- CERN, 1211 Geneva 23, Switzerland
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - V Anosov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - A Antoshkin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - K Augsten
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- Czech Technical University in Prague, 16636 Prague, Czech Republic
| | - W Augustyniak
- National Centre for Nuclear Research, 02-093 Warsaw, Poland
| | - C D R Azevedo
- Department of Physics, University of Aveiro, I3N, 3810-193 Aveiro, Portugal
| | - B Badełek
- Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
| | - F Balestra
- Department of Physics, University of Torino, 10125 Torino, Italy
- Torino Section of INFN, 10125 Torino, Italy
| | - M Ball
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
| | - J Barth
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
| | - R Beck
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
| | - Y Bedfer
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - J Berenguer Antequera
- Department of Physics, University of Torino, 10125 Torino, Italy
- Torino Section of INFN, 10125 Torino, Italy
| | - J Bernhard
- CERN, 1211 Geneva 23, Switzerland
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
| | - M Bodlak
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | | | - A Bressan
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Trieste Section of INFN, 34127 Trieste, Italy
| | - V E Burtsev
- Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - W-C Chang
- Academia Sinica, Institute of Physics, Taipei 11529, Taiwan
| | - C Chatterjee
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Trieste Section of INFN, 34127 Trieste, Italy
| | - M Chiosso
- Department of Physics, University of Torino, 10125 Torino, Italy
- Torino Section of INFN, 10125 Torino, Italy
| | - A G Chumakov
- Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - S-U Chung
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - A Cicuttin
- Trieste Section of INFN, 34127 Trieste, Italy
| | - P M M Correia
- Department of Physics, University of Aveiro, I3N, 3810-193 Aveiro, Portugal
| | - M L Crespo
- Trieste Section of INFN, 34127 Trieste, Italy
| | - D D'Ago
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Trieste Section of INFN, 34127 Trieste, Italy
| | | | - S S Dasgupta
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India
| | - S Dasgupta
- Trieste Section of INFN, 34127 Trieste, Italy
| | - I Denisenko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | | | - S V Donskov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - N Doshita
- Yamagata University, Yamagata 992-8510, Japan
| | - Ch Dreisbach
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - W Dünnweber
- Department of Physics, University of Aveiro, I3N, 3810-193 Aveiro, Portugal
- Institut für Experimentalphysik, Universität Bochum, 44780 Bochum, Germany
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
- Physikalisches Institut, Universität Bonn, 53115 Bonn, Germany
- Institute of Scientific Instruments of the CAS, 61264 Brno, Czech Republic
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
- CERN, 1211 Geneva 23, Switzerland
- Technical University in Liberec, 46117 Liberec, Czech Republic
- LIP, 1649-003 Lisbon, Portugal
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
- University of Miyazaki, Miyazaki 889-2192, Japan
- Lebedev Physical Institute, 119991 Moscow, Russia
- Physik Department, Technische Universität München, 85748 Garching, Germany
- Nagoya University, 464 Nagoya, Japan
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
- Czech Technical University in Prague, 16636 Prague, Czech Republic
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
- Academia Sinica, Institute of Physics, Taipei 11529, Taiwan
- School of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Trieste Section of INFN, 34127 Trieste, Italy
- Department of Physics, University of Torino, 10125 Torino, Italy
- Torino Section of INFN, 10125 Torino, Italy
- Tomsk Polytechnic University, 634050 Tomsk, Russia
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
- National Centre for Nuclear Research, 02-093 Warsaw, Poland
- Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
- Institute of Radioelectronics, Warsaw University of Technology, 00-665 Warsaw, Poland
- Yamagata University, Yamagata 992-8510, Japan
| | - R R Dusaev
- Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - A Efremov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - P D Eversheim
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
| | | | - M Faessler
- Department of Physics, University of Aveiro, I3N, 3810-193 Aveiro, Portugal
- Institut für Experimentalphysik, Universität Bochum, 44780 Bochum, Germany
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
- Physikalisches Institut, Universität Bonn, 53115 Bonn, Germany
- Institute of Scientific Instruments of the CAS, 61264 Brno, Czech Republic
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
- CERN, 1211 Geneva 23, Switzerland
- Technical University in Liberec, 46117 Liberec, Czech Republic
- LIP, 1649-003 Lisbon, Portugal
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
- University of Miyazaki, Miyazaki 889-2192, Japan
- Lebedev Physical Institute, 119991 Moscow, Russia
- Physik Department, Technische Universität München, 85748 Garching, Germany
- Nagoya University, 464 Nagoya, Japan
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
- Czech Technical University in Prague, 16636 Prague, Czech Republic
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
- Academia Sinica, Institute of Physics, Taipei 11529, Taiwan
- School of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Trieste Section of INFN, 34127 Trieste, Italy
- Department of Physics, University of Torino, 10125 Torino, Italy
- Torino Section of INFN, 10125 Torino, Italy
- Tomsk Polytechnic University, 634050 Tomsk, Russia
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
- National Centre for Nuclear Research, 02-093 Warsaw, Poland
- Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
- Institute of Radioelectronics, Warsaw University of Technology, 00-665 Warsaw, Poland
- Yamagata University, Yamagata 992-8510, Japan
| | - M Finger
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | - M Finger
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | - H Fischer
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | | | - J M Friedrich
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - V Frolov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- CERN, 1211 Geneva 23, Switzerland
| | - F Gautheron
- Institut für Experimentalphysik, Universität Bochum, 44780 Bochum, Germany
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - O P Gavrichtchouk
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - S Gerassimov
- Lebedev Physical Institute, 119991 Moscow, Russia
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - J Giarra
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
| | - I Gnesi
- Department of Physics, University of Torino, 10125 Torino, Italy
- Torino Section of INFN, 10125 Torino, Italy
| | - M Gorzellik
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - A Grasso
- Department of Physics, University of Torino, 10125 Torino, Italy
- Torino Section of INFN, 10125 Torino, Italy
| | - A Gridin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Grosse Perdekamp
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - B Grube
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - A Guskov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - D von Harrach
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
| | - R Heitz
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - F Herrmann
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | | | - N d'Hose
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - C-Y Hsieh
- Academia Sinica, Institute of Physics, Taipei 11529, Taiwan
| | - S Huber
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - S Ishimoto
- Yamagata University, Yamagata 992-8510, Japan
| | - A Ivanov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - T Iwata
- Yamagata University, Yamagata 992-8510, Japan
| | - M Jandek
- Czech Technical University in Prague, 16636 Prague, Czech Republic
| | - V Jary
- Czech Technical University in Prague, 16636 Prague, Czech Republic
| | - R Joosten
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
| | - P Jörg
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - E Kabuß
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
| | - F Kaspar
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - A Kerbizi
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Trieste Section of INFN, 34127 Trieste, Italy
| | - B Ketzer
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
| | - G V Khaustov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - Yu A Khokhlov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - Yu Kisselev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - F Klein
- Physikalisches Institut, Universität Bonn, 53115 Bonn, Germany
| | - J H Koivuniemi
- Institut für Experimentalphysik, Universität Bochum, 44780 Bochum, Germany
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - V N Kolosov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | | | - I Konorov
- Lebedev Physical Institute, 119991 Moscow, Russia
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - V F Konstantinov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | | | - O M Kouznetsov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - A Koval
- National Centre for Nuclear Research, 02-093 Warsaw, Poland
| | - Z Kral
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | - F Krinner
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - Y Kulinich
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - F Kunne
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - K Kurek
- National Centre for Nuclear Research, 02-093 Warsaw, Poland
| | - R P Kurjata
- Institute of Radioelectronics, Warsaw University of Technology, 00-665 Warsaw, Poland
| | - A Kveton
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | - K Lavickova
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | - S Levorato
- CERN, 1211 Geneva 23, Switzerland
- Trieste Section of INFN, 34127 Trieste, Italy
| | - Y-S Lian
- Academia Sinica, Institute of Physics, Taipei 11529, Taiwan
| | - J Lichtenstadt
- School of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel
| | - P-J Lin
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - R Longo
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | | | - A Maggiora
- Torino Section of INFN, 10125 Torino, Italy
| | - A Magnon
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India
| | - N Makins
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - N Makke
- Trieste Section of INFN, 34127 Trieste, Italy
| | - G K Mallot
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
- CERN, 1211 Geneva 23, Switzerland
| | - A Maltsev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - S A Mamon
- Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - B Marianski
- National Centre for Nuclear Research, 02-093 Warsaw, Poland
| | - A Martin
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Trieste Section of INFN, 34127 Trieste, Italy
| | - J Marzec
- Institute of Radioelectronics, Warsaw University of Technology, 00-665 Warsaw, Poland
| | - J Matoušek
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Trieste Section of INFN, 34127 Trieste, Italy
| | - T Matsuda
- University of Miyazaki, Miyazaki 889-2192, Japan
| | - G Mattson
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - G V Meshcheryakov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Meyer
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - W Meyer
- Institut für Experimentalphysik, Universität Bochum, 44780 Bochum, Germany
| | - Yu V Mikhailov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - M Mikhasenko
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
- CERN, 1211 Geneva 23, Switzerland
| | - E Mitrofanov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - N Mitrofanov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Y Miyachi
- Yamagata University, Yamagata 992-8510, Japan
| | - A Moretti
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Trieste Section of INFN, 34127 Trieste, Italy
| | - A Nagaytsev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - C Naim
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - D Neyret
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - J Nový
- Czech Technical University in Prague, 16636 Prague, Czech Republic
| | - W-D Nowak
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
| | - G Nukazuka
- Yamagata University, Yamagata 992-8510, Japan
| | | | - A G Olshevsky
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Ostrick
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
| | - D Panzieri
- Torino Section of INFN, 10125 Torino, Italy
| | - B Parsamyan
- Department of Physics, University of Torino, 10125 Torino, Italy
- Torino Section of INFN, 10125 Torino, Italy
| | - S Paul
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - H Pekeler
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
| | - J-C Peng
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - M Pešek
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | - D V Peshekhonov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Pešková
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | - N Pierre
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - S Platchkov
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - J Pochodzalla
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
| | - V A Polyakov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - J Pretz
- Physikalisches Institut, Universität Bonn, 53115 Bonn, Germany
| | - M Quaresma
- LIP, 1649-003 Lisbon, Portugal
- Academia Sinica, Institute of Physics, Taipei 11529, Taiwan
| | | | - G Reicherz
- Institut für Experimentalphysik, Universität Bochum, 44780 Bochum, Germany
| | - C Riedl
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - T Rudnicki
- Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
| | - D I Ryabchikov
- Physik Department, Technische Universität München, 85748 Garching, Germany
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - A Rybnikov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - A Rychter
- Institute of Radioelectronics, Warsaw University of Technology, 00-665 Warsaw, Poland
| | - V D Samoylenko
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - A Sandacz
- National Centre for Nuclear Research, 02-093 Warsaw, Poland
| | - S Sarkar
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India
| | - I A Savin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - G Sbrizzai
- Department of Physics, University of Trieste, 34127 Trieste, Italy
- Trieste Section of INFN, 34127 Trieste, Italy
| | - H Schmieden
- Physikalisches Institut, Universität Bonn, 53115 Bonn, Germany
| | - A Selyunin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - L Sinha
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India
| | - M Slunecka
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | - J Smolik
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - A Srnka
- Institute of Scientific Instruments of the CAS, 61264 Brno, Czech Republic
| | - D Steffen
- CERN, 1211 Geneva 23, Switzerland
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | | | - O Subrt
- CERN, 1211 Geneva 23, Switzerland
- Czech Technical University in Prague, 16636 Prague, Czech Republic
| | - M Sulc
- Technical University in Liberec, 46117 Liberec, Czech Republic
| | - H Suzuki
- Yamagata University, Yamagata 992-8510, Japan
| | - P Sznajder
- National Centre for Nuclear Research, 02-093 Warsaw, Poland
| | - S Tessaro
- Trieste Section of INFN, 34127 Trieste, Italy
| | - F Tessarotto
- CERN, 1211 Geneva 23, Switzerland
- Trieste Section of INFN, 34127 Trieste, Italy
| | - A Thiel
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
| | - J Tomsa
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | - F Tosello
- Torino Section of INFN, 10125 Torino, Italy
| | - A Townsend
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA
| | - V Tskhay
- Lebedev Physical Institute, 119991 Moscow, Russia
| | - S Uhl
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | | | - A Vauth
- Physikalisches Institut, Universität Bonn, 53115 Bonn, Germany
- CERN, 1211 Geneva 23, Switzerland
| | - B M Veit
- CERN, 1211 Geneva 23, Switzerland
- Institut für Kernphysik, Universität Mainz, 55099 Mainz, Germany
| | - J Veloso
- Department of Physics, University of Aveiro, I3N, 3810-193 Aveiro, Portugal
| | - B Ventura
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - A Vidon
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - M Virius
- Czech Technical University in Prague, 16636 Prague, Czech Republic
| | - M Wagner
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
| | - S Wallner
- Physik Department, Technische Universität München, 85748 Garching, Germany
| | - K Zaremba
- Institute of Radioelectronics, Warsaw University of Technology, 00-665 Warsaw, Poland
| | - P Zavada
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - M Zavertyaev
- Lebedev Physical Institute, 119991 Moscow, Russia
| | - M Zemko
- CERN, 1211 Geneva 23, Switzerland
- Faculty of Mathematics and Physics, Charles University, 18000 Prague, Czech Republic
| | - E Zemlyanichkina
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
| | - Y Zhao
- Trieste Section of INFN, 34127 Trieste, Italy
| | - M Ziembicki
- Institute of Radioelectronics, Warsaw University of Technology, 00-665 Warsaw, Poland
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22
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Mullen C, Gardner S, Glazier DI, Kay SJD, Livingston K, Strakovsky II, Workman RL, Abt S, Achenbach P, Afzal F, Ahmed Z, Akondi CS, Annand JRM, Bashkanov M, Beck R, Biroth M, Borisov NS, Braghieri A, Briscoe WJ, Cividini F, Collicott C, Costanza S, Denig A, Dieterle M, Downie EJ, Drexler P, Fegan S, Ferretti-Bondy MI, Ghosal D, Gorodnov I, Gradl W, Günther M, Gurevic G, Heijkenskjöld L, Hornidge D, Huber GM, Jermann N, Kaeser A, Korolija M, Kashevarov VL, Krusche B, Kulikov VV, Lazarev A, Lutterer S, MacGregor IJD, Manley DM, Martel PP, Martemianov MA, Meier C, Miskimen R, Mocanu M, Mornacchi E, Neganov A, Oberle M, Ostrick M, Otte P, Paudyal D, Pedroni P, Powell A, Prakhov SN, Reicherz G, Ron G, Rostomyan T, Sfienti C, Sokhoyan V, Spieker K, Steffen O, Strub T, Supek I, Thiel A, Thiel M, Thomas A, Unverzagt M, Usov YA, Wagner S, Walford NK, Watts DP, Werthmüller D, Wettig J, Witthauer L, Wolfes M, Zachariou N. Single π 0 production off neutrons bound in deuteron with linearly polarized photons. Eur Phys J A Hadron Nucl 2021; 57:205. [PMID: 34720708 PMCID: PMC8550430 DOI: 10.1140/epja/s10050-021-00521-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 06/10/2021] [Indexed: 06/13/2023]
Abstract
The quasifree γ → d → π 0 n ( p ) photon beam asymmetry, Σ , has been measured at photon energies, E γ , from 390 to 610 MeV, corresponding to center of mass energy from 1.271 to 1.424 GeV, for the first time. The data were collected in the A2 hall of the MAMI electron beam facility with the Crystal Ball and TAPS calorimeters covering pion center-of-mass angles from 49 ∘ to 148 ∘ . In this kinematic region, polarization observables are sensitive to contributions from the Δ ( 1232 ) and N(1440) resonances. The extracted values of Σ have been compared to predictions based on partial-wave analyses (PWAs) of the existing pion photoproduction database. Our comparison includes the SAID, MAID and Bonn-Gatchina analyses; while a revised SAID fit, including the new Σ measurements, has also been performed. In addition, isospin symmetry is examined as a way to predict π 0 n photoproduction observables, based on fits to published data in the channels π 0 p , π + n and π - p .
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Affiliation(s)
- C. Mullen
- SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK
| | - S. Gardner
- SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK
| | - D. I. Glazier
- SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK
| | - S. J. D. Kay
- SUPA, School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH9 3FD UK
- Department of Physics, University of Regina, Regina, SK S4S 0A2 Canada
| | - K. Livingston
- SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK
| | - I. I. Strakovsky
- Department of Physics, Institute for Nuclear Studies, The George Washington University, Washington, DC, 20052 USA
| | - R. L. Workman
- Department of Physics, Institute for Nuclear Studies, The George Washington University, Washington, DC, 20052 USA
| | - S. Abt
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - P. Achenbach
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - F. Afzal
- Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, 53115 Bonn, Germany
| | - Z. Ahmed
- Department of Physics, University of Regina, Regina, SK S4S 0A2 Canada
| | | | - J. R. M. Annand
- SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK
| | - M. Bashkanov
- Department of Physics, University of York, Heslington, York, Y010 5DD UK
| | - R. Beck
- Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, 53115 Bonn, Germany
| | - M. Biroth
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | | | | | - W. J. Briscoe
- Department of Physics, Institute for Nuclear Studies, The George Washington University, Washington, DC, 20052 USA
| | - F. Cividini
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - C. Collicott
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | | | - A. Denig
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - M. Dieterle
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - E. J. Downie
- Department of Physics, Institute for Nuclear Studies, The George Washington University, Washington, DC, 20052 USA
| | - P. Drexler
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - S. Fegan
- Department of Physics, University of York, Heslington, York, Y010 5DD UK
| | - M. I. Ferretti-Bondy
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - D. Ghosal
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | | | - W. Gradl
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - M. Günther
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - G. Gurevic
- Institute for Nuclear Research, 125047 Moscow, Russia
| | - L. Heijkenskjöld
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - D. Hornidge
- Mount Allison University, Sackville, NB E4L3B5 Canada
| | - G. M. Huber
- Department of Physics, University of Regina, Regina, SK S4S 0A2 Canada
| | - N. Jermann
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - A. Kaeser
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - M. Korolija
- Rudjer Boskovic Institute, 10000 Zagreb, Croatia
| | - V. L. Kashevarov
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
- JINR, 141980 Dubna, Russia
| | - B. Krusche
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - V. V. Kulikov
- NRC “Kurchatov Institute”-ITEP, 117218 Moscow, Russia
| | - A. Lazarev
- Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, 53115 Bonn, Germany
| | - S. Lutterer
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - I. J. D. MacGregor
- SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK
| | | | - P. P. Martel
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | | | - C. Meier
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - R. Miskimen
- University of Massachusetts, Amherst, MA 01003 USA
| | - M. Mocanu
- Department of Physics, University of York, Heslington, York, Y010 5DD UK
| | - E. Mornacchi
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | | | - M. Oberle
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - M. Ostrick
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - P. Otte
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - D. Paudyal
- Department of Physics, University of Regina, Regina, SK S4S 0A2 Canada
| | - P. Pedroni
- INFN Sezione di Pavia, 27100 Pavia, Italy
| | - A. Powell
- SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK
| | - S. N. Prakhov
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - G. Reicherz
- Institut für Experimentalphysik, Ruhr-University of Bochum, 44801 Bochum, Germany
| | - G. Ron
- Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem, Israel
| | - T. Rostomyan
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - C. Sfienti
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - V. Sokhoyan
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - K. Spieker
- Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, 53115 Bonn, Germany
| | - O. Steffen
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - Th. Strub
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - I. Supek
- Rudjer Boskovic Institute, 10000 Zagreb, Croatia
| | - A. Thiel
- Helmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, 53115 Bonn, Germany
| | - M. Thiel
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - A. Thomas
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - M. Unverzagt
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | | | - S. Wagner
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - N. K. Walford
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - D. P. Watts
- Department of Physics, University of York, Heslington, York, Y010 5DD UK
| | - D. Werthmüller
- SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK
| | - J. Wettig
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - L. Witthauer
- Institut für Physik, University of Basel, 4056 Basel, Switzerland
| | - M. Wolfes
- Institut für Kernphysik, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - N. Zachariou
- Department of Physics, University of York, Heslington, York, Y010 5DD UK
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23
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Bernauer JC, Schmidt A, Henderson BS, Ice LD, Khaneft D, O'Connor C, Russell R, Akopov N, Alarcon R, Ates O, Avetisyan A, Beck R, Belostotski S, Bessuille J, Brinker F, Calarco JR, Carassiti V, Cisbani E, Ciullo G, Contalbrigo M, De Leo R, Diefenbach J, Donnelly TW, Dow K, Elbakian G, Eversheim PD, Frullani S, Funke C, Gavrilov G, Gläser B, Görrissen N, Hasell DK, Hauschildt J, Hoffmeister P, Holler Y, Ihloff E, Izotov A, Kaiser R, Karyan G, Kelsey J, Kiselev A, Klassen P, Krivshich A, Kohl M, Lehmann I, Lenisa P, Lenz D, Lumsden S, Ma Y, Maas F, Marukyan H, Miklukho O, Milner RG, Movsisyan A, Murray M, Naryshkin Y, Perez Benito R, Perrino R, Redwine RP, Rodríguez Piñeiro D, Rosner G, Schneekloth U, Seitz B, Statera M, Thiel A, Vardanyan H, Veretennikov D, Vidal C, Winnebeck A, Yeganov V. Measurement of the Charge-Averaged Elastic Lepton-Proton Scattering Cross Section by the OLYMPUS Experiment. Phys Rev Lett 2021; 126:162501. [PMID: 33961478 DOI: 10.1103/physrevlett.126.162501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 03/17/2021] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
We report the first measurement of the average of the electron-proton and positron-proton elastic scattering cross sections. This lepton charge-averaged cross section is insensitive to the leading effects of hard two-photon exchange, giving more robust access to the proton's electromagnetic form factors. The cross section was extracted from data taken by the OLYMPUS experiment at DESY, in which alternating stored electron and positron beams were scattered from a windowless gaseous hydrogen target. Elastic scattering events were identified from the coincident detection of the scattered lepton and recoil proton in a large-acceptance toroidal spectrometer. The luminosity was determined from the rates of Møller, Bhabha, and elastic scattering in forward electromagnetic calorimeters. The data provide some selectivity between existing form factor global fits and will provide valuable constraints to future fits.
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Affiliation(s)
- J C Bernauer
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Schmidt
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B S Henderson
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - L D Ice
- Arizona State University, Tempe, Arizona 85287, USA
| | - D Khaneft
- Johannes Gutenberg-Universität, Mainz, Germany
| | - C O'Connor
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - R Russell
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - N Akopov
- Alikhanyan National Science Laboratory (Yerevan Physics Institute), Yerevan, Armenia
| | - R Alarcon
- Arizona State University, Tempe, Arizona 85287, USA
| | - O Ates
- Hampton University, Hampton, Virginia 23668, USA
| | - A Avetisyan
- Alikhanyan National Science Laboratory (Yerevan Physics Institute), Yerevan, Armenia
| | - R Beck
- Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany
| | - S Belostotski
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - J Bessuille
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - F Brinker
- Deutsches Elektronen-Synchrotron, Hamburg, Germany
| | - J R Calarco
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - V Carassiti
- Università degli Studi di Ferrara and Istituto Nazionale di Fisica Nucleare sezione di Ferrara, Ferrara, Italy
| | - E Cisbani
- Istituto Nazionale di Fisica Nucleare sezione di Roma and Istituto Superiore di Sanità, Rome, Italy
| | - G Ciullo
- Università degli Studi di Ferrara and Istituto Nazionale di Fisica Nucleare sezione di Ferrara, Ferrara, Italy
| | - M Contalbrigo
- Università degli Studi di Ferrara and Istituto Nazionale di Fisica Nucleare sezione di Ferrara, Ferrara, Italy
| | - R De Leo
- Istituto Nazionale di Fisica Nucleare sezione di Bari, Bari, Italy
| | - J Diefenbach
- Hampton University, Hampton, Virginia 23668, USA
| | - T W Donnelly
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - K Dow
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - G Elbakian
- Alikhanyan National Science Laboratory (Yerevan Physics Institute), Yerevan, Armenia
| | - P D Eversheim
- Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany
| | - S Frullani
- Istituto Nazionale di Fisica Nucleare sezione di Roma and Istituto Superiore di Sanità, Rome, Italy
| | - Ch Funke
- Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany
| | - G Gavrilov
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - B Gläser
- Johannes Gutenberg-Universität, Mainz, Germany
| | - N Görrissen
- Deutsches Elektronen-Synchrotron, Hamburg, Germany
| | - D K Hasell
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Hauschildt
- Deutsches Elektronen-Synchrotron, Hamburg, Germany
| | - Ph Hoffmeister
- Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany
| | - Y Holler
- Deutsches Elektronen-Synchrotron, Hamburg, Germany
| | - E Ihloff
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Izotov
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - R Kaiser
- University of Glasgow, Glasgow, United Kingdom
| | - G Karyan
- Alikhanyan National Science Laboratory (Yerevan Physics Institute), Yerevan, Armenia
| | - J Kelsey
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Kiselev
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - P Klassen
- Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany
| | - A Krivshich
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - M Kohl
- Hampton University, Hampton, Virginia 23668, USA
| | - I Lehmann
- University of Glasgow, Glasgow, United Kingdom
| | - P Lenisa
- Università degli Studi di Ferrara and Istituto Nazionale di Fisica Nucleare sezione di Ferrara, Ferrara, Italy
| | - D Lenz
- Deutsches Elektronen-Synchrotron, Hamburg, Germany
| | - S Lumsden
- University of Glasgow, Glasgow, United Kingdom
| | - Y Ma
- Johannes Gutenberg-Universität, Mainz, Germany
| | - F Maas
- Johannes Gutenberg-Universität, Mainz, Germany
| | - H Marukyan
- Alikhanyan National Science Laboratory (Yerevan Physics Institute), Yerevan, Armenia
| | - O Miklukho
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - R G Milner
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Movsisyan
- Alikhanyan National Science Laboratory (Yerevan Physics Institute), Yerevan, Armenia
- Università degli Studi di Ferrara and Istituto Nazionale di Fisica Nucleare sezione di Ferrara, Ferrara, Italy
| | - M Murray
- University of Glasgow, Glasgow, United Kingdom
| | - Y Naryshkin
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | | | - R Perrino
- Istituto Nazionale di Fisica Nucleare sezione di Bari, Bari, Italy
| | - R P Redwine
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | | | - G Rosner
- University of Glasgow, Glasgow, United Kingdom
| | | | - B Seitz
- University of Glasgow, Glasgow, United Kingdom
| | - M Statera
- Università degli Studi di Ferrara and Istituto Nazionale di Fisica Nucleare sezione di Ferrara, Ferrara, Italy
| | - A Thiel
- Rheinische Friedrich-Wilhelms-Universität, Bonn, Germany
| | - H Vardanyan
- Alikhanyan National Science Laboratory (Yerevan Physics Institute), Yerevan, Armenia
| | | | - C Vidal
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Winnebeck
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - V Yeganov
- Alikhanyan National Science Laboratory (Yerevan Physics Institute), Yerevan, Armenia
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Abstract
Background The rehabilitation process following cochlear implant (CI) surgery is carried out in a multimodal therapy according to German national guidelines and includes technical and medical aftercare. In times of the corona pandemic surgery and rehabilitation appointments were cancelled or delayed leading to a more difficult access to auditory rehabilitation. Newly implemented hygiene modalities due to the SARS-CoV‑2 pandemic have changed medical aftercare and the rehabilitation process. The aim of this study was to evaluate the quality of rehabilitation under corona conditions. Material and methods An anonymous survey of adult cochlear implant patients was carried out by a non-standardized questionnaire. Demographics were analyzed and the quality of medical aftercare, speech therapy, technical aftercare, psychological support and the hygiene modalities were compared to previous rehabilitation stays. Results In total 109 patients completed the questionnaire. The quality of rehabilitation and individual therapy were rated as qualitatively similar or improved. The threat of the pandemic and fear of corona were rated unexpectedly high with 68% and 50%, respectively. The hygiene measures during the rehabilitation stay eased subjective fears at the same time. The majority of patients were annoyed by wearing face masks but visors, protection shields and social distancing were more tolerated. Conclusion The implementation of the new hygiene modalities within the therapeutic rehabilitation setting was well-accepted by patients allowing access to auditory rehabilitation. A successful rehabilitation should ensure a fear-free environment by adhering to the necessary hygiene modalities. Electronic supplementary material The online version of this article (10.1007/s00106-020-00923-z) includes the study questionnaire. Article and supplementary material are available at www.springermedizin.de. Please enter the title of the article in the search field, the supplementary material can be found under “Ergänzende Inhalte”. ![]()
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Affiliation(s)
- A Aschendorff
- Department of Oto-Rhino-Laryngology, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Germany.
| | - S Arndt
- Department of Oto-Rhino-Laryngology, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Germany
| | - S Kröger
- Department of Oto-Rhino-Laryngology, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Germany
| | - T Wesarg
- Department of Oto-Rhino-Laryngology, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Germany
| | - M C Ketterer
- Department of Oto-Rhino-Laryngology, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Germany
| | - P Kirchem
- Department of Oto-Rhino-Laryngology, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Germany
| | - S Pixner
- Department of Oto-Rhino-Laryngology, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Germany
| | - F Hassepaß
- Department of Oto-Rhino-Laryngology, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Germany
| | - R Beck
- Department of Oto-Rhino-Laryngology, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Germany
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25
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Gottschall M, Afzal F, Anisovich AV, Bayadilov D, Beck R, Bichow M, Brinkmann KT, Crede V, Dieterle M, Dietz F, Dutz H, Eberhardt H, Elsner D, Ewald R, Fornet-Ponse K, Friedrich S, Frommberger F, Gridnev A, Grüner M, Gutz E, Hammann C, Hannappel J, Hartmann J, Hillert W, Hoffmeister P, Honisch C, Jude T, Kammer S, Kalinowsky H, Keshelashvili I, Klassen P, Klein F, Klempt E, Koop K, Krusche B, Kube M, Lang M, Lopatin I, Mahlberg P, Makonyi K, Metag V, Meyer W, Müller J, Müllers J, Nanova M, Nikonov V, Novotny R, Piontek D, Reicherz G, Rostomyan T, Sarantsev A, Schmidt C, Schmieden H, Seifen T, Sokhoyan V, Spieker K, Thiel A, Thoma U, Urban M, Pee HV, Walther D, Wendel C, Werthmüller D, Wiedner U, Wilson A, Winnebeck A, Witthauer L, Wunderlich Y. Measurement of the helicity asymmetry E for the reaction γ p → π 0 p : The CBELSA/TAPS Collaboration. Eur Phys J A Hadron Nucl 2021; 57:40. [PMID: 33551676 PMCID: PMC7840663 DOI: 10.1140/epja/s10050-020-00334-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 11/28/2020] [Indexed: 06/12/2023]
Abstract
A measurement of the double-polarization observable E for the reaction γ p → π 0 p is reported. The data were taken with the CBELSA/TAPS experiment at the ELSA facility in Bonn using the Bonn frozen-spin butanol (C4 H9 OH) target, which provided longitudinally-polarized protons. Circularly-polarized photons were produced via bremsstrahlung of longitudinally-polarized electrons. The data cover the photon energy range fromE γ = 600 to 2310 MeV and nearly the complete angular range. The results are compared to and have been included in recent partial wave analyses.
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Affiliation(s)
- M. Gottschall
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - F. Afzal
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - A. V. Anisovich
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - D. Bayadilov
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - R. Beck
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - M. Bichow
- Institut für Experimentalphysik I, Ruhr–Universität Bochum, Bochum, Germany
| | | | - V. Crede
- Department of Physics, Florida State University, Tallahassee, FL 32306 USA
| | - M. Dieterle
- Physikalisches Institut, Universität Basel, Basel, Switzerland
| | - F. Dietz
- Physikalisches Institut, Universität Gießen, Gießen, Germany
| | - H. Dutz
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | - H. Eberhardt
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | - D. Elsner
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | - R. Ewald
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | | | - St. Friedrich
- Physikalisches Institut, Universität Gießen, Gießen, Germany
| | - F. Frommberger
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | - A. Gridnev
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - M. Grüner
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - E. Gutz
- Physikalisches Institut, Universität Gießen, Gießen, Germany
| | - Ch. Hammann
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - J. Hannappel
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | - J. Hartmann
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - W. Hillert
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | - Ph. Hoffmeister
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - Ch. Honisch
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - T. Jude
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | - S. Kammer
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | - H. Kalinowsky
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | | | - P. Klassen
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - F. Klein
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | - E. Klempt
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - K. Koop
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - B. Krusche
- Physikalisches Institut, Universität Basel, Basel, Switzerland
| | - M. Kube
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - M. Lang
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - I. Lopatin
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - P. Mahlberg
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - K. Makonyi
- Physikalisches Institut, Universität Gießen, Gießen, Germany
| | - V. Metag
- Physikalisches Institut, Universität Gießen, Gießen, Germany
| | - W. Meyer
- Institut für Experimentalphysik I, Ruhr–Universität Bochum, Bochum, Germany
| | - J. Müller
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - J. Müllers
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - M. Nanova
- Physikalisches Institut, Universität Gießen, Gießen, Germany
| | - V. Nikonov
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - R. Novotny
- Physikalisches Institut, Universität Gießen, Gießen, Germany
| | - D. Piontek
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - G. Reicherz
- Institut für Experimentalphysik I, Ruhr–Universität Bochum, Bochum, Germany
| | - T. Rostomyan
- Physikalisches Institut, Universität Basel, Basel, Switzerland
| | - A. Sarantsev
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
- Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - Ch. Schmidt
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - H. Schmieden
- Physikalisches Institut, Universität Bonn, Bonn, Germany
| | - T. Seifen
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - V. Sokhoyan
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - K. Spieker
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - A. Thiel
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - U. Thoma
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - M. Urban
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - H. van Pee
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - D. Walther
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - Ch. Wendel
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - D. Werthmüller
- Physikalisches Institut, Universität Basel, Basel, Switzerland
| | - U. Wiedner
- Institut für Experimentalphysik I, Ruhr–Universität Bochum, Bochum, Germany
| | - A. Wilson
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
- Department of Physics, Florida State University, Tallahassee, FL 32306 USA
| | - A. Winnebeck
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
| | - L. Witthauer
- Physikalisches Institut, Universität Basel, Basel, Switzerland
| | - Y. Wunderlich
- Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
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Di Trana A, Beck R, Del Rio A. Management of GHB acute intoxications. Clin Ter 2020; 171:e49-e51. [PMID: 33346326 DOI: 10.7417/ct.2021.2280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Intoxications related to γ-Hydroxybutyric acid (GHB), arising from its success as recreational drug due to its psychotropic properties, are significantly and alarmingly jeopardizing public health, posing major challenges to medical staff. In recent years, GHB's prodrug γ-butyrolactone (GBL) has often supplanted GHB in recreational settings, owing to its lower cost and the ease with which it can be obtained, mainly due to its various legal industrial applications. The Authors intend to stress that symptoms should be assessed and confirmed by timely toxicological analyses by highly-trained, expert professionals. Such tests aimed at analytical confirmation are instrumental in providing physicians valuable indications in terms of the proper pharmacological treatments in order to revert the adverse, or even fatal, side effects, particularly when the overall intoxication picture looks ambiguous. At the time being, little is known about the pharmacological therapies effective in GHB intoxication cases; further comprehensive research is therefore essential, if we are to tackle such a burgeoning public health emergency before it is too late.
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Affiliation(s)
- A Di Trana
- Unit of Forensic Toxicology, Section of Legal Medicine, Department of Excellence of Biomedical Sciences and Public Health, Polytechnic University of Marche, Ancona
| | - R Beck
- Anesthesia and Intensive Care Unit, Department of Medical and Surgical Sciences, University of Foggia, Policlinico Riuniti Foggia, Foggia
| | - A Del Rio
- Department of Anatomical, Histological, Forensic, and Orthopaedic Sciences, Sapienza University of Rome, Rome, Italy
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Ketterer MC, Arndt S, Knopf A, Jakob TF, Beck R, Aschendorff A. [Navigated endoscopically controlled transtympanic resection of an infracochlear cholesteatoma recurrence. German version]. HNO 2020; 69:589-592. [PMID: 33346853 DOI: 10.1007/s00106-020-00977-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2020] [Indexed: 11/26/2022]
Abstract
An infracochlear cholesteatoma of the petrous apex with direct contact to the internal carotid artery (ICA) is rare. Due to the risk of cochlear injury with consecutive deafness or injury of the ICA, precise preoperative planning of the approach and strategy is recommended, as well as thorough preoperative counseling of the patient for their informed consent. This case report presents navigated endoscopically controlled transtympanic resection of such a cholesteatoma recurrence. Hearing capacity was not impaired and the patient shows no signs of recurrence.
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Affiliation(s)
- M C Ketterer
- Klinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland.
| | - S Arndt
- Klinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - A Knopf
- Klinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - T F Jakob
- Klinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - R Beck
- Klinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - A Aschendorff
- Klinik für Hals-Nasen-Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
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Wurzer A, Parzinger M, Konrad M, Beck R, Günther T, Felber V, Färber S, Di Carlo D, Wester HJ. Preclinical comparison of four [ 18F, natGa]rhPSMA-7 isomers: influence of the stereoconfiguration on pharmacokinetics. EJNMMI Res 2020; 10:149. [PMID: 33284394 PMCID: PMC7721954 DOI: 10.1186/s13550-020-00740-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 11/24/2020] [Indexed: 12/27/2022] Open
Abstract
Introduction Radiohybrid (rh) ligands, a novel class of prostate-specific membrane antigen (PSMA)-targeted radiopharmaceuticals, can be labeled either with [18F]fluorine via isotopic exchange or with radiometals (such as [68Ga]Gallium, [177Lu]Lutetium, [225Ac]Actinium). Among these, [18F, natGa]rhPSMA-7 has recently entered clinical assessment.
Aim Since [18F, natGa]rhPSMA-7 is composed of four stereoisomers ([18F, natGa]rhPSMA-7.1, -7.2, -7.3 and -7.4), we initiated a preclinical selection process to identify the isomer with the most favorable pharmacokinetics for further clinical investigation. Methods A synthetic protocol for enantiopure [19F, natGa]rhPSMA-7 isomers has been developed. The comparative evaluation of the four isomers comprised human serum albumin binding, lipophilicity, IC50, internalization and classical biodistribution studies and competition experiments in LNCaP tumor-bearing CB-17 SCID mice. In addition, a radio high-performance liquid chromatography-based method was developed allowing quantitative, intraindividual comparison of [18F, natGa]rhPSMA-7.1 to -7.4 in LNCaP tumor-bearing mice. Results Cell studies revealed high PSMA affinity and internalization for [18/19F, natGa]rhPSMA-7.2, -7.3 and -7.4, whereas [18/19F, natGa]rhPSMA-7.1 showed approximately twofold lower values. Although the biodistribution profile obtained was typical of PSMA inhibitors, it did not allow for selection of a lead candidate for clinical studies. Thus, an intraindividual comparison of all four isomers in LNCaP tumor-bearing mice was carried out by injection of a diastereomeric mixture, followed by analysis of the differential uptake and excretion pattern of each isomer. Based on its high tumor accumulation and low uptake in blood, liver and kidneys, [18F, natGa]rhPSMA-7.3 was identified as the preferred isomer and transferred into clinical studies. Conclusion [18F, natGa]rhPSMA-7.3 has been selected as a lead compound for clinical development of a [18F]rhPSMA-based candidate. The intraindividual differential uptake and excretion analysis in vivo allowed for an accurate comparison and assessment of radiopharmaceuticals.
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Affiliation(s)
- Alexander Wurzer
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany.
| | - Mara Parzinger
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany
| | - Matthias Konrad
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany
| | - Roswitha Beck
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany
| | - Thomas Günther
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany
| | - Veronika Felber
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany
| | - Stefanie Färber
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany
| | - Daniel Di Carlo
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany
| | - Hans-Jürgen Wester
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany
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29
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Aschendorff A, Arndt S, Kröger S, Wesarg T, Ketterer MC, Kirchem P, Pixner S, Hassepaß F, Beck R. [Quality of cochlear implant rehabilitation under COVID-19 conditions. German version]. HNO 2020; 68:847-853. [PMID: 32876719 PMCID: PMC7466923 DOI: 10.1007/s00106-020-00922-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Hintergrund Die Rehabilitation nach CI(Cochleaimplantat)-Operation erfolgt leitliniengerecht durch eine multimodale Therapie, technische Anpassungen des Sprachprozessors und medizinische Nachsorge. Zu Zeiten der Corona-Pandemie wurde für die Patienten der Zugang zur auditorischen Rehabilitation verzögert oder erschwert. Die neuen Hygienemaßnahmen durch die SARS-Cov-2-Pandemie verändern auch die medizinische Nachsorge und Rehabilitation nach CI. Ziel der Untersuchung war es, die Qualität der Rehabilitation unter Corona-Bedingungen zu evaluieren. Material und Methoden Wir führten eine anonyme Befragung erwachsener Rehabilitanden mittels nichtstandardisiertem Fragebogen durch. Beurteilt wurden im Vergleich zu den Voraufenthalten die Qualität der ärztlichen Betreuung, der Sprach- und Musiktherapie, der technischen Anpassung und der psychologischen Betreuung sowie der Einsatz der Hygienemaßnahmen. Ergebnisse Insgesamt 109 Rehabilitanden beantworteten den Fragebogen. Die Qualität der Rehabilitation und der Therapien wurde als qualitativ unverändert oder besser eingeschätzt. Die Gefährlichkeit der Pandemie, aber auch die Angst in der derzeitigen Situation gaben die Rehabilitanden zu einem unerwartet hohen Prozentsatz mit 68 bzw. 50 % an. Gleichzeitig konnten die getroffenen Hygienemaßnahmen die Patienten subjektiv während des Aufenthalts entlasten. Der Mund-Nasen-Schutz war für die Mehrheit sehr störend, Visiere, Spuckschutz bzw. Abstandsgebot wurden eher toleriert. Schlussfolgerungen Die Umsetzung der Hygienemaßnahmen im therapeutischen Setting der CI-Rehabilitation wird von den Rehabilitanden akzeptiert und erlaubt den Zugang zur auditorischen Rehabilitation. Ziel einer erfolgreichen CI-Rehabilitation sollte eine möglichst angstfreie Behandlung unter Wahrung der Hygieneregeln sein. Zusatzmaterial online Die Online-Version dieses Beitrags (10.1007/s00106-020-00922-0) enthält den Studienfragebogen. Beitrag und Zusatzmaterial stehen Ihnen auf www.springermedizin.de zur Verfügung. Bitte geben Sie dort den Beitragstitel in die Suche ein, das Zusatzmaterial finden Sie beim Beitrag unter „Ergänzende Inhalte“. ![]()
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Affiliation(s)
- A Aschendorff
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Albert-Ludwigs-Universität Freiburg im Breisgau, Killianstr. 5, 79106, Freiburg, Deutschland.
| | - S Arndt
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Albert-Ludwigs-Universität Freiburg im Breisgau, Killianstr. 5, 79106, Freiburg, Deutschland
| | - S Kröger
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Albert-Ludwigs-Universität Freiburg im Breisgau, Killianstr. 5, 79106, Freiburg, Deutschland
| | - T Wesarg
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Albert-Ludwigs-Universität Freiburg im Breisgau, Killianstr. 5, 79106, Freiburg, Deutschland
| | - M C Ketterer
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Albert-Ludwigs-Universität Freiburg im Breisgau, Killianstr. 5, 79106, Freiburg, Deutschland
| | - P Kirchem
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Albert-Ludwigs-Universität Freiburg im Breisgau, Killianstr. 5, 79106, Freiburg, Deutschland
| | - S Pixner
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Albert-Ludwigs-Universität Freiburg im Breisgau, Killianstr. 5, 79106, Freiburg, Deutschland
| | - F Hassepaß
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Albert-Ludwigs-Universität Freiburg im Breisgau, Killianstr. 5, 79106, Freiburg, Deutschland
| | - R Beck
- Klinik für Hals‑, Nasen- und Ohrenheilkunde, Albert-Ludwigs-Universität Freiburg im Breisgau, Killianstr. 5, 79106, Freiburg, Deutschland
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Afzal F, Wunderlich Y, Anisovich AV, Bayadilov D, Beck R, Becker M, Blanke E, Brinkmann KT, Ciupka S, Crede V, Dieterle M, Dutz H, Elsner D, Friedrich S, Frommberger F, Gridnev A, Gottschall M, Grüner M, Gutz E, Hammann C, Hannappel J, Hartmann J, Hillert W, Hoff J, Hoffmeister P, Honisch C, Jude T, Kalinowsky H, Kalischewski F, Keshelashvili I, Klassen P, Klein F, Klempt E, Koop K, Kroenert P, Krusche B, Lang M, Lopatin I, Mahlberg P, Meißner UG, Messi F, Metag V, Meyer W, Mitlasóczki B, Müller J, Müllers J, Nanova M, Nikonov K, Nikonov V, Novinskiy V, Novotny R, Piontek D, Reicherz G, Richter L, Rönchen D, Rostomyan T, Salisbury B, Sarantsev A, Schaab D, Schmidt C, Schmieden H, Schultes J, Seifen T, Sokhoyan V, Sowa C, Spieker K, Stausberg N, Thiel A, Thoma U, Triffterer T, Urban M, Urff G, van Pee H, Walther D, Wendel C, Wiedner U, Wilson A, Winnebeck A, Witthauer L. Observation of the pη^{'} Cusp in the New Precise Beam Asymmetry Σ Data for γp→pη. Phys Rev Lett 2020; 125:152002. [PMID: 33095637 DOI: 10.1103/physrevlett.125.152002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/24/2020] [Accepted: 08/28/2020] [Indexed: 06/11/2023]
Abstract
Data on the beam asymmetry Σ in the photoproduction of η mesons off protons are reported for tagged photon energies from 1130 to 1790 MeV (mass range from W=1748 MeV to W=2045 MeV). The data cover the full solid angle that allows for a precise moment analysis. For the first time, a strong cusp effect in a polarization observable has been observed that is an effect of a branch-point singularity at the pη^{'} threshold [E_{γ}=1447 MeV (W=1896 MeV)]. The latest BnGa partial wave analysis includes the new beam asymmetry data and yields a strong indication for the N(1895)1/2^{-} nucleon resonance, demonstrating the importance of including all singularities for a correct determination of partial waves and resonance parameters.
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Affiliation(s)
- F Afzal
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - Y Wunderlich
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - A V Anisovich
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
- National Research Centre "Kurchatov Institute", Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - D Bayadilov
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
- National Research Centre "Kurchatov Institute", Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - R Beck
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - M Becker
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - E Blanke
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - K-Th Brinkmann
- II. Physikalisches Institut, Universität Giessen, Germany
| | - S Ciupka
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - V Crede
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - M Dieterle
- Physikalisches Institut, Universität Basel, Switzerland
| | - H Dutz
- Physikalisches Institut, Universität Bonn, Germany
| | - D Elsner
- Physikalisches Institut, Universität Bonn, Germany
| | - S Friedrich
- II. Physikalisches Institut, Universität Giessen, Germany
| | | | - A Gridnev
- National Research Centre "Kurchatov Institute", Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - M Gottschall
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - M Grüner
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - E Gutz
- II. Physikalisches Institut, Universität Giessen, Germany
| | - C Hammann
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - J Hannappel
- Physikalisches Institut, Universität Bonn, Germany
| | - J Hartmann
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - W Hillert
- Physikalisches Institut, Universität Bonn, Germany
| | - J Hoff
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - P Hoffmeister
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - C Honisch
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - T Jude
- Physikalisches Institut, Universität Bonn, Germany
| | - H Kalinowsky
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - F Kalischewski
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | | | - P Klassen
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - F Klein
- Physikalisches Institut, Universität Bonn, Germany
| | - E Klempt
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - K Koop
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - P Kroenert
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - B Krusche
- Physikalisches Institut, Universität Basel, Switzerland
| | - M Lang
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - I Lopatin
- National Research Centre "Kurchatov Institute", Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - P Mahlberg
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - U-G Meißner
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
- Institute for Advanced Simulation, Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425 Jülich, Germany
| | - F Messi
- Physikalisches Institut, Universität Bonn, Germany
| | - V Metag
- II. Physikalisches Institut, Universität Giessen, Germany
| | - W Meyer
- Institut für Experimentalphysik I, Ruhr Universität Bochum, Germany
| | - B Mitlasóczki
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - J Müller
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - J Müllers
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - M Nanova
- II. Physikalisches Institut, Universität Giessen, Germany
| | - K Nikonov
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
- National Research Centre "Kurchatov Institute", Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - V Nikonov
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
- National Research Centre "Kurchatov Institute", Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - V Novinskiy
- National Research Centre "Kurchatov Institute", Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - R Novotny
- II. Physikalisches Institut, Universität Giessen, Germany
| | - D Piontek
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - G Reicherz
- Institut für Experimentalphysik I, Ruhr Universität Bochum, Germany
| | - L Richter
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - D Rönchen
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - T Rostomyan
- Physikalisches Institut, Universität Basel, Switzerland
| | - B Salisbury
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - A Sarantsev
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
- National Research Centre "Kurchatov Institute", Petersburg Nuclear Physics Institute, Gatchina, Russia
| | - D Schaab
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - C Schmidt
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - H Schmieden
- Physikalisches Institut, Universität Bonn, Germany
| | - J Schultes
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - T Seifen
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - V Sokhoyan
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - C Sowa
- Institut für Experimentalphysik I, Ruhr Universität Bochum, Germany
| | - K Spieker
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - N Stausberg
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - A Thiel
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - U Thoma
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - T Triffterer
- Institut für Experimentalphysik I, Ruhr Universität Bochum, Germany
| | - M Urban
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - G Urff
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - H van Pee
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - D Walther
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - Ch Wendel
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - U Wiedner
- Institut für Experimentalphysik I, Ruhr Universität Bochum, Germany
| | - A Wilson
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - A Winnebeck
- Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Germany
| | - L Witthauer
- Physikalisches Institut, Universität Basel, Switzerland
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Beck R, Malvasi A, Kuczkowski KM, Marinelli E, Zaami S. Intrapartum sonography of fetal head in second stage of labor with neuraxial analgesia: a literature review and possible medicolegal aftermath. Eur Rev Med Pharmacol Sci 2020; 23:3159-3166. [PMID: 31081066 DOI: 10.26355/eurrev_201904_17673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Intrapartum ultrasound (IU) is a valid support to obstetric management of fetal head progression in the second stage of labor in nulliparous with neuraxial labor analgesia (NLA). Nulliparous with NLA may have a prolonged the second stage of labor. The aim of this literature review was to evaluate the mode of delivery, as well as maternal and fetal morbidities associated with missed progression of fetal head detected with IU in the second stage of labor in nulliparous women with NLA. MATERIALS AND METHODS The literature review was performed using PubMed, Cochrane, Medline, EMBASE, Scopus, Google Scholar and book chapters searches to identify relevant articles from 2001 to 2019, evaluating the mode of delivery and morbidities of the second stage of labor. Search terms used were "Intrapartum ultrasound", "dystocia", "prolonged labor", "neuraxial analgesia", "persistent occiput posterior position", "asynclitism", "second stage of labor", "medico-legal aftermath". Prolonged second stage was defined as three hours and more. Retrospective case series of women with prolonged second stage of labor with NLA were identified. The primary outcome was the incidence of operative vaginal delivery (OVD) and cesarean delivery (CS). RESULTS The use of NLA may determine a prolonged second stage of labor (PSSL). IU when compared to the traditional vaginal digital examination (VDE) demonstrated the highest degree of diagnostic accuracy. CONCLUSIONS The use of IU during NLA can aid in the diagnosis of fetal head progression, station or malposition and malrotation, alerts obstetrician on the possibility of dystocic labor, indicating to stop the drug administration in NLA and shift to OVD or CS. Extending the second stage of labor beyond current American College of Obstetricians and Gynecologists (ACOG) recommendations is beneficial. The ISUOG guidelines recommended the clinical application of IU to diagnose the persistent occiput posterior position (POPP) and asynclitism (A) in dystocic labor and produce photographic evidence of the case. Maternal and neonatal complications, medicolegal consequences and litigation can decrease if the IU device is used as good practice.
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Affiliation(s)
- R Beck
- Department of Anesthesia, Santa Maria Hospital, GVM Care and Research, Bari, Italy.
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32
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Dieterle M, Witthauer L, Fix A, Abt S, Achenbach P, Adlarson P, Afzal F, Aguar Bartolome P, Ahmed Z, Annand JRM, Arends HJ, Bashkanov M, Beck R, Biroth M, Borisov N, Braghieri A, Briscoe WJ, Cividini F, Collicott C, Costanza S, Denig A, Dolzhikov AS, Downie EJ, Drexler P, Gardner S, Ghosal D, Glazier DI, Gorodnov I, Gradl W, Günther M, Gurevich D, Heijkenskjöld L, Hornidge D, Huber GM, Käser A, Kashevarov VL, Kay S, Keshelashvili I, Kondratiev R, Korolija M, Krusche B, Lazarev A, Lisin V, Livingston K, Lutterer S, MacGregor IJD, Manley DM, Martel PP, Metag V, Meyer W, Middleton DG, Miskimen R, Mornacchi E, Mullen C, Mushkarenkov A, Neganov A, Neiser A, Oberle M, Ostrick M, Otte PB, Paudyal D, Pedroni P, Polonski A, Powell A, Prakhov SN, Reicherz G, Ron G, Rostomyan T, Sarty A, Sfienti C, Sokhoyan V, Spieker K, Steffen O, Strakovsky II, Strub T, Supek I, Thiel A, Thiel M, Thomas A, Unverzagt M, Usov YA, Wagner S, Walford NK, Watts DP, Werthmüller D, Wettig J, Wolfes M, Zana LA. Helicity-Dependent Cross Sections for the Photoproduction of π^{0} Pairs from Nucleons. Phys Rev Lett 2020; 125:062001. [PMID: 32845675 DOI: 10.1103/physrevlett.125.062001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 05/17/2020] [Accepted: 07/15/2020] [Indexed: 06/11/2023]
Abstract
The double-polarization observable E and helicity-dependent cross sections σ_{1/2}, σ_{3/2} have been measured for the photoproduction of π^{0} pairs off quasifree protons and neutrons at the Mainz MAMI accelerator with the Crystal Ball/TAPS setup. A circularly polarized photon beam was produced by bremsstrahlung from longitudinally polarized electrons and impinged on a longitudinally polarized deuterated butanol target. The reaction products were detected with an almost 4π covering calorimeter. The results reveal for the first time the helicity- and isospin-dependent structure of the γN→Nπ^{0}π^{0} reaction. They are compared to predictions from reaction models in view of nucleon resonance contributions and also to a refit of one model that predicted results for the proton and for the neutron target. The comparison of the prediction and the refit demonstrates the large impact of the new data.
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Affiliation(s)
- M Dieterle
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - L Witthauer
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - A Fix
- Laboratory of Mathematical Physics, Tomsk Polytechnic University, 634034 Tomsk, Russia
| | - S Abt
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - P Achenbach
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - P Adlarson
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - F Afzal
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
| | - P Aguar Bartolome
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - Z Ahmed
- University of Regina, Regina, Saskatchewan S4S-0A2 Canada
| | - J R M Annand
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - H J Arends
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Bashkanov
- SUPA School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
| | - R Beck
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
| | - M Biroth
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - N Borisov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - A Braghieri
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
| | - W J Briscoe
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
| | - F Cividini
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - C Collicott
- Department of Astronomy and Physics, Saint Mary's University, E4L1E6 Halifax, Canada
| | - S Costanza
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
| | - A Denig
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - A S Dolzhikov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - E J Downie
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
| | - P Drexler
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- II. Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany
| | - S Gardner
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - D Ghosal
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - D I Glazier
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
- SUPA School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
| | - I Gorodnov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - W Gradl
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Günther
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - D Gurevich
- Institute for Nuclear Research, RU-125047 Moscow, Russia
| | - L Heijkenskjöld
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - D Hornidge
- Mount Allison University, Sackville, New Brunswick E4L1E6, Canada
| | - G M Huber
- University of Regina, Regina, Saskatchewan S4S-0A2 Canada
| | - A Käser
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - V L Kashevarov
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - S Kay
- SUPA School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
| | - I Keshelashvili
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - R Kondratiev
- Institute for Nuclear Research, RU-125047 Moscow, Russia
| | - M Korolija
- Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia
| | - B Krusche
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - A Lazarev
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - V Lisin
- Institute for Nuclear Research, RU-125047 Moscow, Russia
| | - K Livingston
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - S Lutterer
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - I J D MacGregor
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - D M Manley
- Kent State University, Kent, Ohio 44242, USA
| | - P P Martel
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- Mount Allison University, Sackville, New Brunswick E4L3B5, Canada
| | - V Metag
- II. Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany
| | - W Meyer
- Institut für Experimentalphysik, Ruhr Universität, 44780 Bochum, Germany
| | - D G Middleton
- Mount Allison University, Sackville, New Brunswick E4L3B5, Canada
| | - R Miskimen
- University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - E Mornacchi
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - C Mullen
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - A Mushkarenkov
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
- University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - A Neganov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - A Neiser
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Oberle
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - M Ostrick
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - P B Otte
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - D Paudyal
- University of Regina, Regina, Saskatchewan S4S-0A2 Canada
| | - P Pedroni
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
| | - A Polonski
- Institute for Nuclear Research, RU-125047 Moscow, Russia
| | - A Powell
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - S N Prakhov
- University of California Los Angeles, Los Angeles, California 90095-1547, USA
| | - G Reicherz
- Institut für Experimentalphysik, Ruhr Universität, 44780 Bochum, Germany
| | - G Ron
- Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - T Rostomyan
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - A Sarty
- Department of Astronomy and Physics, Saint Mary's University, E4L1E6 Halifax, Canada
| | - C Sfienti
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - V Sokhoyan
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - K Spieker
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
| | - O Steffen
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - I I Strakovsky
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
| | - T Strub
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - I Supek
- Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia
| | - A Thiel
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
| | - M Thiel
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - A Thomas
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Unverzagt
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - Yu A Usov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - S Wagner
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - N K Walford
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
| | - D P Watts
- SUPA School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
| | - D Werthmüller
- Department of Physics, University of Basel, CH-4056 Basel, Switzerland
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - J Wettig
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Wolfes
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - L A Zana
- SUPA School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
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Wurzer A, Di Carlo D, Schmidt A, Beck R, Eiber M, Schwaiger M, Wester HJ. Radiohybrid Ligands: A Novel Tracer Concept Exemplified by 18F- or 68Ga-Labeled rhPSMA Inhibitors. J Nucl Med 2020; 61:735-742. [PMID: 31862804 PMCID: PMC7198388 DOI: 10.2967/jnumed.119.234922] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 09/27/2019] [Indexed: 11/16/2022] Open
Abstract
When we critically assess the reason for the current dominance of 68Ga-labeled peptides and peptide-like ligands in radiopharmacy and nuclear medicine, we have to conclude that the major advantage of such radiopharmaceuticals is the apparent lack of suitable 18F-labeling technologies with proven clinical relevance. To prepare and to subsequently perform a clinical proof-of-concept study on the general suitability of silicon-fluoride-acceptor (SiFA)-conjugated radiopharmaceuticals, we developed inhibitors of the prostate-specific membrane antigen (PSMA) that are labeled by isotopic exchange (IE). To compensate for the pronounced lipophilicity of the SiFA unit, we used metal chelates, conjugated in close proximity to SiFA. Six different radiohybrid PSMA ligands (rhPSMA ligands) were evaluated and compared with the commonly used 18F-PSMA inhibitors 18F-DCFPyL and 18F-PSMA-1007. Methods: All inhibitors were synthesized by solid-phase peptide synthesis. Human serum albumin binding was measured by affinity high-performance liquid chromatography, whereas the lipophilicity of each tracer was determined by the n-octanol/buffer method. In vitro studies (IC50, internalization) were performed on LNCaP cells. Biodistribution studies were conducted on LNCaP tumor-bearing male CB-17 SCID mice. Results: On the laboratory scale (starting activities, 0.2-9.0 GBq), labeling of 18F-rhPSMA-5 to -10 by IE was completed in < 20 min (radiochemical yields, 58% ± 9%; radiochemical purity, >97%) with molar activities of 12-60 GBq/μmol. All rhPSMAs showed low nanomolar affinity and high internalization by PSMA-expressing cells when compared with the reference radiopharmaceuticals, medium-to-low lipophilicity, and high human serum albumin binding. Biodistribution studies in LNCaP tumor-bearing mice revealed high tumor uptake, sufficiently fast clearance kinetics from blood, low hepatobiliary excretion, fast renal excretion, and very low uptake of 18F activity in bone. Conclusion: The novel 18F-rhPSMA radiopharmaceuticals developed under the radiohybrid concept show equal or better targeting characteristics than the established 18F-PSMA tracers 18F-DCFPyL and 18F-PSMA-1007. The unparalleled simplicity of production, the possibility to produce the identical 68Ga-labeled 19F-68Ga-rhPSMA tracers, and the possibility to extend this concept to true theranostic radiohybrid radiopharmaceuticals, such as F-Lu-rhPSMA, are unique features of these radiopharmaceuticals.
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Affiliation(s)
- Alexander Wurzer
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany; and
| | - Daniel Di Carlo
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany; and
| | - Alexander Schmidt
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany; and
| | - Roswitha Beck
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany; and
| | - Matthias Eiber
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Markus Schwaiger
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Hans-Jürgen Wester
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Garching, Germany; and
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Bashkanov M, Watts DP, Kay SJD, Abt S, Achenbach P, Adlarson P, Afzal F, Ahmed Z, Akondi CS, Annand JRM, Arends HJ, Beck R, Biroth M, Borisov N, Braghieri A, Briscoe WJ, Cividini F, Collicott C, Costanza S, Denig A, Downie EJ, Drexler P, Fegan S, Fix A, Gardner S, Ghosal D, Glazier DI, Gorodnov I, Gradl W, Günther M, Gurevich D, Heijkenskjöld L, Hornidge D, Huber GM, Käser A, Kashevarov VL, Korolija M, Krusche B, Lazarev A, Livingston K, Lutterer S, MacGregor IJD, Manley DM, Martel PP, Miskimen R, Mornacchi E, Mullen C, Neganov A, Neiser A, Ostrick M, Otte PB, Paudyal D, Pedroni P, Powell A, Prakhov SN, Ron G, Sarty A, Sfienti C, Sokhoyan V, Spieker K, Steffen O, Strakovsky II, Strub T, Supek I, Thiel A, Thiel M, Thomas A, Usov YA, Wagner S, Walford NK, Werthmüller D, Wettig J, Wolfes M, Zachariou N, Zana LA. Signatures of the d^{*}(2380) Hexaquark in d(γ,pn[over →]). Phys Rev Lett 2020; 124:132001. [PMID: 32302204 DOI: 10.1103/physrevlett.124.132001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/30/2020] [Accepted: 03/02/2020] [Indexed: 06/11/2023]
Abstract
We report a measurement of the spin polarization of the recoiling neutron in deuterium photodisintegration, utilizing a new large acceptance polarimeter within the Crystal Ball at MAMI. The measured photon energy range of 300-700 MeV provides the first measurement of recoil neutron polarization at photon energies where the quark substructure of the deuteron plays a role, thereby providing important new constraints on photodisintegration mechanisms. A very high neutron polarization in a narrow structure centered around E_{γ}∼570 MeV is observed, which is inconsistent with current theoretical predictions employing nucleon resonance degrees of freedom. A Legendre polynomial decomposition suggests this behavior could be related to the excitation of the d^{*}(2380) hexaquark.
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Affiliation(s)
- M Bashkanov
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
| | - D P Watts
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
| | - S J D Kay
- University of Regina, Regina, SK S4S0A2 Canada
| | - S Abt
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - P Achenbach
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - P Adlarson
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - F Afzal
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
| | - Z Ahmed
- University of Regina, Regina, SK S4S0A2 Canada
| | - C S Akondi
- Kent State University, Kent, Ohio 44242, USA
| | - J R M Annand
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - H J Arends
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - R Beck
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
| | - M Biroth
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - N Borisov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - A Braghieri
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
| | - W J Briscoe
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
| | - F Cividini
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - C Collicott
- Department of Astronomy and Physics, Saint Mary's University, E4L1E6 Halifax, Canada
| | - S Costanza
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
- Dipartimento di Fisica, Università di Pavia, I-27100 Pavia, Italy
| | - A Denig
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - E J Downie
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
| | - P Drexler
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- II. Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany
| | - S Fegan
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
| | - A Fix
- Tomsk Polytechnic University, 634034 Tomsk, Russia
| | - S Gardner
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - D Ghosal
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - D I Glazier
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - I Gorodnov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - W Gradl
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Günther
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - D Gurevich
- Institute for Nuclear Research, RU-125047 Moscow, Russia
| | - L Heijkenskjöld
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - D Hornidge
- Mount Allison University, Sackville, New Brunswick E4L1E6, Canada
| | - G M Huber
- University of Regina, Regina, SK S4S0A2 Canada
| | - A Käser
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - V L Kashevarov
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - M Korolija
- Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia
| | - B Krusche
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - A Lazarev
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - K Livingston
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - S Lutterer
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - I J D MacGregor
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - D M Manley
- Kent State University, Kent, Ohio 44242, USA
| | - P P Martel
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
- Mount Allison University, Sackville, New Brunswick E4L1E6, Canada
| | - R Miskimen
- University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - E Mornacchi
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - C Mullen
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - A Neganov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - A Neiser
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Ostrick
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - P B Otte
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - D Paudyal
- University of Regina, Regina, SK S4S0A2 Canada
| | - P Pedroni
- INFN Sezione di Pavia, I-27100 Pavia, Pavia, Italy
| | - A Powell
- SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - S N Prakhov
- University of California Los Angeles, Los Angeles, California 90095-1547, USA
| | - G Ron
- Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - A Sarty
- Department of Astronomy and Physics, Saint Mary's University, E4L1E6 Halifax, Canada
| | - C Sfienti
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - V Sokhoyan
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - K Spieker
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
| | - O Steffen
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - I I Strakovsky
- Center for Nuclear Studies, The George Washington University, Washington, DC 20052, USA
| | - T Strub
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - I Supek
- Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia
| | - A Thiel
- Helmholtz-Institut für Strahlen- und Kernphysik, University Bonn, D-53115 Bonn, Germany
| | - M Thiel
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - A Thomas
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - Yu A Usov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - S Wagner
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - N K Walford
- Department of Physics, University of Basel, Ch-4056 Basel, Switzerland
| | - D Werthmüller
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
| | - J Wettig
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - M Wolfes
- Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany
| | - N Zachariou
- Department of Physics, University of York, Heslington, York Y010 5DD, United Kingdom
| | - L A Zana
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
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Knöfler R, Stächele J, Lobstein S, Beck R, Schützle H, Kosk T, Schuchardt K, Kruppa C, Fritzsche K. Gerinnungssupportives Vorgehen beim Neonaten mit Thrombasthenie Glanzmann und Analatresie. Hamostaseologie 2019. [DOI: 10.1055/s-0039-3400723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- R. Knöfler
- Klinik und Poliklinik für Kinder- und Jugendmedizin, Bereich Hämostaseologie, Medizinische Fakultät Carl Gustav Carus Dresden der TU Dresden, Dresden, Germany
| | - J. Stächele
- Klinik und Poliklinik für Kinder- und Jugendmedizin, Bereich Hämostaseologie, Medizinische Fakultät Carl Gustav Carus Dresden der TU Dresden, Dresden, Germany
| | - S. Lobstein
- Klinik für Kinder- und Jugendmedizin, Bereich Neonatologie und Intensivmedizin, Medizinische Fakultät Carl Gustav Carus Dresden der TU Dresden, Dresden, Germany
| | - R. Beck
- Klinik für Kinder- und Jugendmedizin, Bereich Neonatologie und Intensivmedizin, Medizinische Fakultät Carl Gustav Carus Dresden der TU Dresden, Dresden, Germany
| | - H. Schützle
- Klinik für Kinder- und Jugendmedizin, Bereich Neonatologie und Intensivmedizin, Medizinische Fakultät Carl Gustav Carus Dresden der TU Dresden, Dresden, Germany
| | - T. Kosk
- Klinik und Poliklinik für Kinderchirurgie, Medizinische Fakultät Carl Gustav Carus Dresden der TU Dresden, Dresden, Germany
| | - K. Schuchardt
- Klinik und Poliklinik für Kinderchirurgie, Medizinische Fakultät Carl Gustav Carus Dresden der TU Dresden, Dresden, Germany
| | - C. Kruppa
- Klinik und Poliklinik für Kinderchirurgie, Medizinische Fakultät Carl Gustav Carus Dresden der TU Dresden, Dresden, Germany
| | - K. Fritzsche
- Klinik und Poliklinik für Anästhesiologie und Intensivmedizin, Medizinische Fakultät Carl Gustav Carus Dresden der TU Dresden, Dresden, Germany
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Alballaa A, Aschendorff A, Arndt S, Hildenbrand T, Becker C, Hassepass F, Laszig R, Beck R, Speck I, Wesarg T, Ketterer MC. [Incomplete partition type III revisited-long-term results following cochlear implant. German version]. HNO 2019; 67:760-768. [PMID: 31485697 DOI: 10.1007/s00106-019-00733-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Incomplete partition type III (IP III) is defined by a missing lamina cribrosa between the cochlea and the internal auditory canal (IAC). Cochlear implantation (CI) may result in an insertion of the electrode array into the IAC. The aim of this study is to evaluate CI surgery protocols, long-term audiological outcome, mapping and electrophysiological data after CI in IP III patients. MATERIALS AND METHODS Nine IP III patients were implanted with perimodiolar electrode arrays between 1999 and 2014; eight of them were included in this study. We evaluated mapping data, stapedius reflexes, electrode impedances and ECAP thresholds. We matched them with 3 CI patients each with normal cochlear morphology regarding sex, age, side, implant type and surgical date. Speech discrimination was evaluated with the Oldenburger sentence test for adults, Göttingen audiometric speech test for children and the Freiburger monosyllabic word test. RESULTS 3 years after CI IP III patients showed a significant increase in pulse width, calculated electric load and electrode impedances in basal electrodes. Intraoperative electrically-evoked stapedius reflexes could be measured in all patients. Speech recognition scores were lower than average scores for matched patients, but without statistical significance. CONCLUSIONS The significant increase of pulse width, electric load and electrode impedances of basal electrodes over time seem to be characteristic for IP III patients probably occurring due to fibrosis and neurodegeneration of the cochlear nerve. The long term audiological results are stable. Intraoperative imaging and stapedius reflexes are highly recommended to control the right position of the electrode array.
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Affiliation(s)
- A Alballaa
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
- Department of Otolaryngology, King Abdulaziz University Hospital, King Abdullah Ear Specialist Center (KAESC), College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - A Aschendorff
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - S Arndt
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - T Hildenbrand
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - C Becker
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - F Hassepass
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - R Laszig
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - R Beck
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - I Speck
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - T Wesarg
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland
| | - M C Ketterer
- Klinik für Hals‑, Nasen‑, Ohrenheilkunde, Universitätsklinikum Freiburg, Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Killianstraße 5, 79106, Freiburg, Deutschland.
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Baldini D, Beck R, Negro F, De Viti D. Assisted reproductive technologies and metabolic syndrome complications: medico-legal reappraisal. Clin Ter 2019; 170:e364-e367. [PMID: 31612194 DOI: 10.7417/ct.2019.2161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In the last 40 years, the number of elderly patients that require Assisted Reproductive Technologies (ART) has risen enormously, especially after heterolougus fertilization techniques have become available. In recent years, the incidence of peripartum cardiomyopathy (PPCM) has substantially grown, as a consequence of the combined effect of increased maternal age, consequent high prevalence of hypertension and metabolic syndrome (MS). That cohort of women may be exposed to a greater number of cardiac, obstetric and anesthesio-logical complications, therefore the incidence of medico-legal issues, litigation, liabilities and claims over the past years has significantly risen. Cardiovascular and hormonal changes during pregnancy can challenge even the healthiest of individuals, and in that pregnant population the risk is even greater. These patients should be monitored before the ART, during pregnancy, delivery and puerperium, to avoid heart failure, thrombotic problems, embolic complications, stroke and death. Management issues regarding pregnancy and delivery are elaborate, including anesthesia considerations. This new population of women needs an accurate cardiac risk stratification with a thorough cardiovascular history and examination, 12 lead ECG, and transthoracic echocardiogram. Therefore, a comprehensive multidisciplinary assessment and management can provide the best opportunity to improve maternal and neonatal outcomes.
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Affiliation(s)
- D Baldini
- Momo Fertilife IVF Center, Bisceglie, Italy
| | - R Beck
- Department of Anesthesia, Santa Maria Hospital, GVM Care & Reasearch, Bari
| | - F Negro
- Department of Anatomical, Histological, Forensic and Orthopedic Sciences, "Sapienza" University of Rome, Rome
| | - D De Viti
- Department of Cardiology, Cardiac Surgery and Intensive care Unit, Santa Maria Hospital, GVM Care & Reasearch, Bari, Italy
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38
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Notni J, Wurzer A, Reichart F, Maltsev O, Steiger K, Beck R, Schwaiger M, Wester HJ, Kessler H. A 68Ga-labelled PET probe for selective imaging of αvβ8-integrin. Nucl Med Biol 2019. [DOI: 10.1016/s0969-8051(19)30240-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zaami S, Stark M, Beck R, Malvasi A, Marinelli E. Does episiotomy always equate violence in obstetrics? Routine and selective episiotomy in obstetric practice and legal questions. Eur Rev Med Pharmacol Sci 2019; 23:1847-1854. [PMID: 30915726 DOI: 10.26355/eurrev_201903_17219] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The study's main goal is to figure out whether episiotomy, a widely applied invasive procedure, may constitute a determining factor of liability for practitioners according to the standards of obstetric violence. MATERIALS AND METHODS The authors have aimed to analyze laws and documentation issued on the matter by sovereign states, statements and remarks from International health organizations, in addition to scientific article available on the main search engines (PubMed, Scopus, Google Scholar) and legal databases (Lexis, Justia). RESULTS The body of research has highlighted the existence of a wide-ranging agreement as to routine episiotomy, deemed to be a scientifically unfounded procedure, and which should, therefore, be avoided. By virtue of that, routine episiotomy might easily give rise to charges and liability for doctors and midwives alike; likewise to claims may stem from a failure to perform an episiotomy when it was actually needed. CONCLUSIONS Unlike routine episiotomy, selective episiotomy is far more unlikely to cause charges of obstetric violence against operators. Unfortunately, the criteria in order to establish when a selective episiotomy is indicated are far from consistent and would require an additional effort on the part of scientific societies towards a more clearly defined and shared description.
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Affiliation(s)
- S Zaami
- Department of Anatomical, Histological, Forensic and Orthopedic Sciences, "Sapienza" University of Rome, Rome, Italy.
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Reichart F, Maltsev OV, Kapp TG, Räder AFB, Weinmüller M, Marelli UK, Notni J, Wurzer A, Beck R, Wester HJ, Steiger K, Di Maro S, Di Leva FS, Marinelli L, Nieberler M, Reuning U, Schwaiger M, Kessler H. Selective Targeting of Integrin αvβ8 by a Highly Active Cyclic Peptide. J Med Chem 2019; 62:2024-2037. [DOI: 10.1021/acs.jmedchem.8b01588] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Florian Reichart
- Institute for Advanced Study and Center of Integrated Protein Science (CIPSM), Department Chemie, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Oleg V. Maltsev
- Institute for Advanced Study and Center of Integrated Protein Science (CIPSM), Department Chemie, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Tobias G. Kapp
- Institute for Advanced Study and Center of Integrated Protein Science (CIPSM), Department Chemie, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Andreas F. B. Räder
- Institute for Advanced Study and Center of Integrated Protein Science (CIPSM), Department Chemie, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Michael Weinmüller
- Institute for Advanced Study and Center of Integrated Protein Science (CIPSM), Department Chemie, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
| | - Udaya Kiran Marelli
- Central NMR Facility and Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, 411008 Pune, India
| | - Johannes Notni
- Lehrstuhl für Pharmazeutische Radiochemie, Technische Universität München, Walther-Meißner Straße 3, 85748 Garching, Germany
| | - Alexander Wurzer
- Lehrstuhl für Pharmazeutische Radiochemie, Technische Universität München, Walther-Meißner Straße 3, 85748 Garching, Germany
| | - Roswitha Beck
- Lehrstuhl für Pharmazeutische Radiochemie, Technische Universität München, Walther-Meißner Straße 3, 85748 Garching, Germany
| | - Hans-Jürgen Wester
- Lehrstuhl für Pharmazeutische Radiochemie, Technische Universität München, Walther-Meißner Straße 3, 85748 Garching, Germany
| | - Katja Steiger
- Department of Pathology, Technische Universität München, Trogerstraße 18, 81675 München, Germany
| | - Salvatore Di Maro
- DiSTABiF, Università degli Studi della Campania “Luigi Vanvitelli”, Via Vivaldi 43, 81100 Caserta, Italy
| | - Francesco Saverio Di Leva
- Dipartimento di Farmacia, Università degli Studi di Napoli “Federico II”, Via D. Montesano 49, 80131 Naples, Italy
| | - Luciana Marinelli
- Dipartimento di Farmacia, Università degli Studi di Napoli “Federico II”, Via D. Montesano 49, 80131 Naples, Italy
| | - Markus Nieberler
- Department of Oral and Maxillofacial Surgery, University Hospital Rechts der Isar, Technische Universität München, Ismaninger Straße 22, 81679 München, Germany
| | | | | | - Horst Kessler
- Institute for Advanced Study and Center of Integrated Protein Science (CIPSM), Department Chemie, Technische Universität München, Lichtenbergstraße 4, 85748 Garching, Germany
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Beck R, Milella L, Labellarte C. Continuous non-invasive measurement of stroke volume and cardiac index in infants and children: comparison of Impedance Cardiography NICaS® vs CardioQ® method. Clin Ter 2018; 169:e110-e113. [PMID: 29938742 DOI: 10.7417/t.2018.2064] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Non-invasive measurement of cardiac output (CO) and cardiac index (CI) may become an important modality of moni- toring in pediatrics. Among the several methods proposed, impedance cardiography (ICG) has gained attention among the scientists. There are 2 basic technologies of ICG: thoracic body bioimpedance (TEB) and whole body electrical bioimpedance (WBEB). PURPOSE The present study is aimed to test in infants and children the effectiveness of the Non-Invasive Cardiac System (NICaS®), a new ICG device working with a wrist-to-ankle configuration vs Car- dioQ® transesophageal doppler, a minimally invasive cardiac output monitor. METHODS Whole-body bioimpedance measurements were obtained before and during the surgery with NICaS® and simultaneously with CardioQ®, demographic data were sampled, basement life monitoring were performed. RESULTS Total of 42 patients aged from new born to 16 years old, were included in this study to evaluate heart rate (HR), stroke volume (SV), cardiac output (CO), cardiac index (CI), total peripheral resi- stance index (TPRI), total body water (TBW) and cardiac power index (CPI). 81 measurements were taken simultaneously by both devices from forty-two patients, with CardioQ® serving as the gold-standard for this evaluation and with NICaS®. The average values of CI in the study subjects for CardioQ® cardiac index (Q-CI) and NICaS® cardiac index (NI-CI) were 2.9±0.9 L/min/m² and 2.8±1.0 L/min/m2 respecti- vely (P<0.01). Overall, 2-tailed Pearson's correlation between NI-CI and Q-CI was r = 0.85. The Bland-Altman 1.96-standard deviation limit of agreement was -0.77 L/min and 0.87 L/min/m² with a small bias of 0.05 L/min/m². CONCLUSIONS Good correlation was observed in pediatric patients for CI measured with NICaS® in comparison with CardioQ® device. Continuous non-invasive monitoring of NI-CI can be particularly in- teresting for the pediatric population.
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Affiliation(s)
- R Beck
- Department of Anesthesia, Santa Maria Hospital, GVM Care & Research, Bari
| | - L Milella
- Neonatal and Pediatric General Anesthesia and Pediatric Intensive Care, Pediatric Hospital "Giovanni XXIII", Bari
| | - C Labellarte
- Cardiac Anesthesia, General Anesthesia and Pediatric Intensi- ve Care, Hospital "Sacco", Milan, Italy
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Schottelius M, Wurzer A, Wissmiller K, Beck R, Koch M, Gorpas D, Notni J, Buckle T, van Oosterom MN, Steiger K, Ntziachristos V, Schwaiger M, van Leeuwen FWB, Wester HJ. Synthesis and Preclinical Characterization of the PSMA-Targeted Hybrid Tracer PSMA-I&F for Nuclear and Fluorescence Imaging of Prostate Cancer. J Nucl Med 2018; 60:71-78. [PMID: 30237214 PMCID: PMC6354225 DOI: 10.2967/jnumed.118.212720] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 07/27/2018] [Indexed: 01/13/2023] Open
Abstract
The prostate-specific membrane antigen (PSMA)–targeted radiotracers 68Ga/177Lu-PSMA-I&T and 99mTc-PSMA-I&S (for imaging and surgery) are currently successfully used for clinical PET imaging, radionuclide therapy, and radioguided surgery of metastatic prostate cancer. To additionally exploit the high sensitivity and spatial resolution of fluorescence imaging for improved surgical guidance, a PSMA-I&T–based hybrid tracer, PSMA-I&F (DOTAGA-k(Sulfo-Cy5)-y-nal-k-Sub-KuE), has been developed and evaluated. Methods: The in vitro PSMA-targeting efficiency of PSMA-I&F, the reference PSMA-I&T, and their corresponding natGa-/68Ga- and natLu/177Lu counterparts was determined in LNCaP cells via competitive binding assays (IC50) and dual-tracer radioligand and fluorescence internalization studies. Biodistribution and small-animal PET imaging studies were performed in CB17 SCID and LNCaP xenograft–bearing SHO mice, respectively, and complemented by intraoperative far-red fluorescence imaging using a clinical laparoscope. Additionally, fully automated serial cryosectioning and fluorescence imaging of 1 tumor-bearing animal as well as PSMA immunohistochemistry and fluorescence microscopy of organ cryosections (tumor, kidney, spleen) were also performed. Results: Compared with the parent PSMA-I&T analogs, the PSMA affinities of PSMA-I&F and its natGa-/natLu-complexes remained high and unaffected by dye conjugation (7.9 < IC50 < 10.5 nM for all ligands). The same was observed for the internalization of 68Ga- and 177Lu-PSMA-I&F. In vivo, blood clearance of 68Ga- and 177Lu-PSMA-I&F was only slightly delayed by high plasma protein binding (94%–95%), and very low accumulation in nontarget organs was observed already at 1 h after injection. Dynamic PET imaging confirmed PSMA-specific (as demonstrated by coinjection of 2-PMPA) uptake into the LNCaP xenograft (4.5% ± 1.8 percentage injected dose per gram) and the kidneys (106% ± 23 percentage injected dose per gram). Tumor-to-background ratios of 2.1, 5.2, 9.6, and 9.6 for blood, liver, intestines, and muscle, respectively, at 1 h after injection led to excellent imaging contrast in 68Ga-PSMA-I&F PET and in intraoperative fluorescence imaging. Furthermore, fluorescence imaging of tissue cryosections allowed high-resolution visualization of intraorgan PSMA-I&F distribution in vivo and its correlation with PSMA expression as determined by immunohistochemistry. Conclusion: Thus, with its high PSMA-targeting efficiency and favorable pharmacokinetic profile, 68Ga/177Lu-PSMA-I&F serves as an excellent proof-of-concept compound for the general feasibility of PSMA-I&T–based hybrid imaging. The PSMA-I&T scaffold represents a versatile PSMA-targeted lead structure, allowing relatively straightforward adaptation to the different structural requirements of dedicated nuclear or hybrid imaging agents.
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Affiliation(s)
- Margret Schottelius
- Chair for Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
| | - Alexander Wurzer
- Chair for Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
| | - Katharina Wissmiller
- Chair for Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
| | - Roswitha Beck
- Chair for Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
| | - Maximilian Koch
- Chair for Biological Imaging (CBI), Technische Universität München, Munich, Germany, and Institute for Biological and Medical Imaging (IBMI), Helmholtz Centre Munich, Oberschleißheim, Germany
| | - Dimitrios Gorpas
- Chair for Biological Imaging (CBI), Technische Universität München, Munich, Germany, and Institute for Biological and Medical Imaging (IBMI), Helmholtz Centre Munich, Oberschleißheim, Germany
| | - Johannes Notni
- Chair for Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
| | - Tessa Buckle
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Matthias N van Oosterom
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Katja Steiger
- Institute for Pathology, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany; and
| | - Vasilis Ntziachristos
- Chair for Biological Imaging (CBI), Technische Universität München, Munich, Germany, and Institute for Biological and Medical Imaging (IBMI), Helmholtz Centre Munich, Oberschleißheim, Germany
| | - Markus Schwaiger
- Department of Nuclear Medicine, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Fijs W B van Leeuwen
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Hans-Jürgen Wester
- Chair for Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
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Affiliation(s)
- P. W. Tooley
- Foreign Disease-Weed Science Research Unit, USDA-ARS, Bldg. 1301, Ft. Detrick, Frederick, Maryland 21702
| | - M. M. Carras
- Foreign Disease-Weed Science Research Unit, USDA-ARS, Bldg. 1301, Ft. Detrick, Frederick, Maryland 21702
| | - R. Beck
- Foreign Disease-Weed Science Research Unit, USDA-ARS, Bldg. 1301, Ft. Detrick, Frederick, Maryland 21702
| | - G. Peterson
- Foreign Disease-Weed Science Research Unit, USDA-ARS, Bldg. 1301, Ft. Detrick, Frederick, Maryland 21702
| | - M. R. Bonde
- Foreign Disease-Weed Science Research Unit, USDA-ARS, Bldg. 1301, Ft. Detrick, Frederick, Maryland 21702
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Schmidt A, Wirtz M, Färber SF, Osl T, Beck R, Schottelius M, Schwaiger M, Wester HJ. Effect of Carbohydration on the Theranostic Tracer PSMA I&T. ACS Omega 2018; 3:8278-8287. [PMID: 30087939 PMCID: PMC6068695 DOI: 10.1021/acsomega.8b00790] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 07/12/2018] [Indexed: 06/08/2023]
Abstract
To investigate the effect of carbohydrate moieties on the pharmacokinetic profile of prostate-specific membrane antigen (PSMA) inhibitors, carbohydrated derivatives of the established PSMA-targeted radiopharmaceutical PSMA I&T were developed and evaluated. As observed for the reference PSMA I&T, the natGa/natLu complexes of the respective galactose-, mannose-, and cellobiose-conjugated analogs showed high PSMA affinity. Carbohydration had almost no effect on the lipophilicity, whereas PSMA-mediated internalization was reduced. The specific binding toward human serum albumin (HSA) decreased from 78.6% for [natLu]PSMA I&T to 19.9% for the natLu-labeled cellobiose derivative. Compared to [68Ga]PSMA I&T, [68Ga]PSMA galactose displayed lower nonspecific tissue and kidney accumulation but also slightly lower tumor uptake in small-animal positron emission tomography (μPET) imaging. Biodistribution studies confirmed reduced unspecific uptake in nontarget tissue and decreased renal accumulation of the metabolically stable [68Ga]PSMA galactose derivative, resulting in overall improved tumor-to-tissue ratios. However, carbohydration has no significant beneficial in vivo effect on the targeting performance of PSMA I&T. Nevertheless, carbohydration expands the repertoire of feasible modifications within the linker area and might be a valuable tool for the future development of PSMA inhibitors with decreased kidney uptake.
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Affiliation(s)
- Alexander Schmidt
- Pharmaceutical
Radiochemistry, Department of Chemistry, Technical University Munich, Walther-Meißner-Street 3, 85748 Garching, Germany
| | - Martina Wirtz
- Pharmaceutical
Radiochemistry, Department of Chemistry, Technical University Munich, Walther-Meißner-Street 3, 85748 Garching, Germany
| | - Stefanie Felicitas Färber
- Pharmaceutical
Radiochemistry, Department of Chemistry, Technical University Munich, Walther-Meißner-Street 3, 85748 Garching, Germany
| | - Theresa Osl
- Pharmaceutical
Radiochemistry, Department of Chemistry, Technical University Munich, Walther-Meißner-Street 3, 85748 Garching, Germany
| | - Roswitha Beck
- Pharmaceutical
Radiochemistry, Department of Chemistry, Technical University Munich, Walther-Meißner-Street 3, 85748 Garching, Germany
| | - Margret Schottelius
- Pharmaceutical
Radiochemistry, Department of Chemistry, Technical University Munich, Walther-Meißner-Street 3, 85748 Garching, Germany
| | - Markus Schwaiger
- Department
of Nuclear Medicine, Klinikum rechts der Isar, Technical University Munich, Ismaninger Street 22, 81675 Munich, Germany
| | - Hans-Jürgen Wester
- Pharmaceutical
Radiochemistry, Department of Chemistry, Technical University Munich, Walther-Meißner-Street 3, 85748 Garching, Germany
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Baldini D, Savoia MV, Sciancalepore AG, Malvasi A, Vizziello D, Beck R, Vizziello G. High progesterone levels on the day of HCG administration do not affect the embryo quality and the reproductive outcomes of frozen embryo transfers. Clin Ter 2018; 169:e91-e95. [PMID: 29938738 DOI: 10.7417/t.2018.2060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the impact of pre- mature progesterone rise on the day of human chorionic gonadotropin (hCG) administration on the outcome of in vitro fertilization (IVF) of frozen embryo transfer (FET) cycles using cleavage-stage embryos. METHODS This was a retrospective, cohort study of 131 ovarian stimulation cycles followed by cleavage-stage frozen embryo transfers. The first group consisted of women undergoing FET due to premature luteinization during controlled ovarian stimulation (n = 56, P ≥1.2 ng/ml). The controls were represented by women undergoing FET not complicated by high progesterone levels at induction (n = 75, P < 1.2 ng/ml). For both groups, the progesterone was measured on the day of hCG administration and the fertilization rate, cleavage rate, implantation rate, clinical pregnancy rate, ongoing pregnancy rate and Top-Quality Embryos (TQE) rates were compared. RESULTS The increase of progesterone in patients of the Group A had no significant effects on the number of oocytes retrieved or available for the insemination. The fertilization rate, cleavage rate and implantation rates, as well as the clinical pregnancy rate and ongoing pregnancy were very similar in both study groups. The analysis of TQE rates between the two groups indicated a roughly comparable result. CONCLUSIONS The results of this study showed that progesterone elevation on the day of hCG administration did not affect the outcomes of IVF with frozen embryos at cleavage stage. This study therefore confirms that for patients with high progesterone levels the right way to obtain a healthy pregnancy should be to delay the embryo transfer at a successive FET cycle, not associated with the ovarian stimulation.
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Affiliation(s)
| | | | | | - A Malvasi
- Santa Maria Hospital, GVM Care & Research, Bari
| | - D Vizziello
- IRCCS, Policlinico San Donato, University of Milano, Milano, Italy
| | - R Beck
- Santa Maria Hospital, GVM Care & Research, Bari
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Färber S, Wurzer A, Reichart F, Beck R, Kessler H, Wester HJ, Notni J. Therapeutic Radiopharmaceuticals Targeting Integrin αvβ6. ACS Omega 2018; 3:2428-2436. [PMID: 30023833 PMCID: PMC6045477 DOI: 10.1021/acsomega.8b00035] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 02/19/2018] [Indexed: 05/08/2023]
Abstract
The epithelial integrin αvβ6 is expressed by many malignant carcinoma cell types, including pancreatic cancer, and thus represents a promising target for radionuclide therapy. The peptide cyclo(FRGDLAFp(NMe)K) was decorated with different chelators (DOTPI, DOTAGA, and DOTA). The Lu(III) complexes of these conjugates exhibited comparable αvβ6 integrin affinities (IC50 ranging from 0.3 to 0.8 nM) and good selectivities against other integrins (IC50 for αvβ8 >43 nM; for α5β1 >238 nM; and for αvβ3, αvβ5, and αIIbβ3 >1000 nM). Although different formal charges of the Lu(III) chelates (ranging from 0 to 4) resulted in strongly varying degrees of hydrophilicity (log D ranging from -3.0 to -4.1), biodistributions in murine H2009 xenografts of the Lu-177-labeled compounds (except the DOTPI derivative) were quite similar and comparable to our previously reported αvβ6 integrin positron emission tomography tracer Ga-68-avebehexin. Hence, combinations of existing Ga-68- and Lu-177-labeled c(FRGDLAFp(NMe)K) derivatives could be utilized for αvβ6 integrin-targeted theranostics, whereas our data nonetheless suggest that further improvement of pharmacokinetics might be necessary to ensure clinical success.
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Affiliation(s)
- Stefanie
Felicitas Färber
- Lehrstuhl für
Pharmazeutische Radiochemie and Institute for Advanced Study and
Center of Integrated Protein Science (CIPSM), Department of Chemistry, Technische Universität München, Garching D-85748, Germany
| | - Alexander Wurzer
- Lehrstuhl für
Pharmazeutische Radiochemie and Institute for Advanced Study and
Center of Integrated Protein Science (CIPSM), Department of Chemistry, Technische Universität München, Garching D-85748, Germany
| | - Florian Reichart
- Lehrstuhl für
Pharmazeutische Radiochemie and Institute for Advanced Study and
Center of Integrated Protein Science (CIPSM), Department of Chemistry, Technische Universität München, Garching D-85748, Germany
| | - Roswitha Beck
- Lehrstuhl für
Pharmazeutische Radiochemie and Institute for Advanced Study and
Center of Integrated Protein Science (CIPSM), Department of Chemistry, Technische Universität München, Garching D-85748, Germany
| | - Horst Kessler
- Lehrstuhl für
Pharmazeutische Radiochemie and Institute for Advanced Study and
Center of Integrated Protein Science (CIPSM), Department of Chemistry, Technische Universität München, Garching D-85748, Germany
| | - Hans-Jürgen Wester
- Lehrstuhl für
Pharmazeutische Radiochemie and Institute for Advanced Study and
Center of Integrated Protein Science (CIPSM), Department of Chemistry, Technische Universität München, Garching D-85748, Germany
| | - Johannes Notni
- Lehrstuhl für
Pharmazeutische Radiochemie and Institute for Advanced Study and
Center of Integrated Protein Science (CIPSM), Department of Chemistry, Technische Universität München, Garching D-85748, Germany
- E-mail: , http://www.prc.ch.tum.de (J.N.)
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Dover EN, Beck R, Huang MC, Douillet C, Wang Z, Klett EL, Stýblo M. Arsenite and methylarsonite inhibit mitochondrial metabolism and glucose-stimulated insulin secretion in INS-1 832/13 β cells. Arch Toxicol 2018; 92:693-704. [PMID: 28956099 PMCID: PMC6640649 DOI: 10.1007/s00204-017-2074-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 09/20/2017] [Indexed: 10/18/2022]
Abstract
Growing evidence suggests that exposure to environmental contaminants contributes to the current diabetes epidemic. Inorganic arsenic (iAs), a drinking water and food contaminant, is one of the most widespread environmental diabetogens according to epidemiological studies. Several schemes have been proposed to explain the diabetogenic effects of iAs exposure; however, the exact mechanism remains unknown. We have shown that in vitro exposure to low concentrations of arsenite (iAsIII) or its trivalent methylated metabolites, methylarsonite (MAsIII) and dimethylarsinite (DMAsIII), inhibits glucose-stimulated insulin secretion (GSIS) from isolated pancreatic islets, with little effect on insulin transcription or total insulin content. The goal of this study was to determine if exposure to trivalent arsenicals impairs mitochondrial metabolism, which plays a key role in the regulation of GSIS in β cells. We used a Seahorse extracellular flux analyzer to measure oxygen consumption rate (OCR), a proxy for mitochondrial metabolism, in cultured INS-1 832/13 β cells exposed to iAsIII, MAsIII, or DMAsIII and stimulated with either glucose or pyruvate, a final product of glycolysis and a substrate for the Krebs cycle. We found that 24-h exposure to 2 μM iAsIII or 0.375-0.5 μM MAsIII inhibited OCR in both glucose- and pyruvate-stimulated β cells in a manner that closely paralleled GSIS inhibition. In contrast, 24-h exposure to DMAsIII (up to 2 µM) had no effects on either OCR or GSIS. These results suggest that iAsIII and MAsIII may impair GSIS in β cells by inhibiting mitochondrial metabolism, and that at least one target of these arsenicals is pyruvate decarboxylation or downstream reactions.
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Affiliation(s)
- E N Dover
- Curriculum in Toxicology, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - R Beck
- Department of Genetics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - M C Huang
- Curriculum in Toxicology, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - C Douillet
- Department of Nutrition, CB# 74612, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, 27599-7461, USA
| | - Z Wang
- School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan, 250100, China
| | - E L Klett
- Department of Nutrition, CB# 74612, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, 27599-7461, USA
- Department of Medicine, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Miroslav Stýblo
- Department of Nutrition, CB# 74612, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, 27599-7461, USA.
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Beck A, Huber D, Jurković D, Mrljak V, Baneth G, Beck R. First Report of Histopathological Changes in a Stone Marten ( Martes foina ) With Molecularly and Microscopically Confirmed Hepatozoon sp. Infection. J Comp Pathol 2018. [DOI: 10.1016/j.jcpa.2017.10.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zwergal A, Günther L, Brendel M, Beck R, Lindner S, Xiong G, Eilles E, Unterrainer M, Albert NL, Becker-Bense S, Brandt T, Ziegler S, la Fougère C, Dieterich M, Bartenstein P. In Vivo Imaging of Glial Activation after Unilateral Labyrinthectomy in the Rat: A [ 18F]GE180-PET Study. Front Neurol 2017; 8:665. [PMID: 29312111 PMCID: PMC5732190 DOI: 10.3389/fneur.2017.00665] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 11/24/2017] [Indexed: 01/31/2023] Open
Abstract
The functional relevance of reactive gliosis for recovery from acute unilateral vestibulopathy is unknown. In the present study, glial activation was visualized in vivo by [18F]GE180-PET in a rat model of unilateral labyrinthectomy (UL) and compared to behavioral vestibular compensation (VC) overtime. 14 Sprague-Dawley rats underwent a UL by transtympanic injection of bupivacaine/arsenilate, 14 rats a SHAM UL (injection of normal saline). Glial activation was depicted with [18F]GE180-PET and ex vivo autoradiography at baseline and 7, 15, 30 days after UL/SHAM UL. Postural asymmetry and nystagmus were registered at 1, 2, 3, 7, 15, 30 days after UL/SHAM UL. Signs of vestibular imbalance were found only after UL, which significantly decreased until days 15 and 30. In parallel, [18F]GE180-PET and ex vivo autoradiography depicted glial activation in the ipsilesional vestibular nerve and nucleus on days 7 and 15 after UL. Correlation analysis revealed a strong negative association of [18F]GE180 uptake in the ipsilesional vestibular nucleus on day 7 with the rate of postural recovery (R = −0.90, p < 0.001), suggesting that glial activation accelerates VC. In conclusion, glial activation takes place in the ipsilesional vestibular nerve and nucleus within the first 30 days after UL in the rat and can be visualized in vivo by [18F]GE180-PET.
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Affiliation(s)
- Andreas Zwergal
- German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University, Munich, Germany.,Department of Neurology, Ludwig-Maximilians-University, Munich, Germany
| | - Lisa Günther
- German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University, Munich, Germany
| | - Matthias Brendel
- Department of Nuclear Medicine, Ludwig-Maximilians-University, Munich, Germany.,Munich Cluster of Systems Neurology, SyNergy, Munich, Germany
| | - Roswitha Beck
- German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University, Munich, Germany
| | - Simon Lindner
- Department of Nuclear Medicine, Ludwig-Maximilians-University, Munich, Germany
| | - Guoming Xiong
- German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University, Munich, Germany
| | - Eva Eilles
- German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University, Munich, Germany
| | - Marcus Unterrainer
- Department of Nuclear Medicine, Ludwig-Maximilians-University, Munich, Germany
| | | | - Sandra Becker-Bense
- German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University, Munich, Germany.,Department of Neurology, Ludwig-Maximilians-University, Munich, Germany
| | - Thomas Brandt
- German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University, Munich, Germany.,Clinical Neurosciences, Ludwig-Maximilians-University, Munich, Germany
| | - Sibylle Ziegler
- Department of Nuclear Medicine, Ludwig-Maximilians-University, Munich, Germany
| | - Christian la Fougère
- German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University, Munich, Germany.,Department of Nuclear Medicine, Eberhard Karls University, Tübingen, Germany
| | - Marianne Dieterich
- German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University, Munich, Germany.,Department of Neurology, Ludwig-Maximilians-University, Munich, Germany.,Munich Cluster of Systems Neurology, SyNergy, Munich, Germany
| | - Peter Bartenstein
- German Center for Vertigo and Balance Disorders, DSGZ, Ludwig-Maximilians-University, Munich, Germany.,Department of Nuclear Medicine, Ludwig-Maximilians-University, Munich, Germany.,Munich Cluster of Systems Neurology, SyNergy, Munich, Germany
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Aschendorff A, Arndt S, Laszig R, Wesarg T, Hassepaß F, Beck R. [Treatment and auditory rehabilitation of intralabyrinthine schwannoma by means of cochlear implants - German Version]. HNO 2017; 65:321-327. [PMID: 27573449 DOI: 10.1007/s00106-016-0216-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND To date, the therapy of intralabyrinthine schwannoma consists mainly of a wait-and-see approach, completely ignoring auditory rehabilitation. Only a few single-case reports are as yet available on treatment with cochlear implants (CI). AIM OF THE STUDY This study aimed to assess the results of auditory rehabilitation after treatment with CI in a series of cases. MATERIALS AND METHODS The demographic findings, symptoms, and results of surgical therapy in 8 patients were evaluated in a retrospective analysis. RESULTS Prior to surgery, all patients presented with profound hearing loss and tinnitus. Episodic dizziness was reported by 3 patients. Among the patients, 4 had an intracochlear and 3 an intravestibular schwannoma, and a transmodiolar schwannoma was found in 1 patient. A total of 6 patients underwent treatment with CI. The results of auditory rehabilitation are favorable with open-set speech comprehension. DISCUSSION CI treatment following resection of an intralabyrinthine schwannoma is a promising option for auditory rehabilitation, even in single-sided deafness. This is a new treatment concept in contrast to the wait-and-scan policy. Expectant management appears justified only if the patient still has usable hearing.
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Affiliation(s)
- A Aschendorff
- Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde und Poliklinik, Implant Centrum Freiburg, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Deutschland.
| | - S Arndt
- Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde und Poliklinik, Implant Centrum Freiburg, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Deutschland
| | - R Laszig
- Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde und Poliklinik, Implant Centrum Freiburg, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Deutschland
| | - T Wesarg
- Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde und Poliklinik, Implant Centrum Freiburg, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Deutschland
| | - F Hassepaß
- Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde und Poliklinik, Implant Centrum Freiburg, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Deutschland
| | - R Beck
- Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde und Poliklinik, Implant Centrum Freiburg, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Deutschland
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