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Sumislawski P, Rotermund R, Klose S, Lautenbach A, Wefers AK, Soltwedel C, Mohammadi B, Jacobsen F, Mawrin C, Flitsch J, Saeger W. ACTH-secreting pituitary carcinoma with TP53, NF1, ATRX and PTEN mutations Case report and review of the literature. Endocrine 2022; 76:228-236. [PMID: 35171439 PMCID: PMC8986667 DOI: 10.1007/s12020-021-02954-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 11/14/2021] [Indexed: 02/06/2023]
Affiliation(s)
- Piotr Sumislawski
- Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Martinistr.52, 20246, Hamburg, Germany
| | - Roman Rotermund
- Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Martinistr.52, 20246, Hamburg, Germany
| | - Silke Klose
- Department of Internal Medicine/Endocrinology, Otto von Guericke Universität Magdeburg, Magdeburg, Germany
| | - Anne Lautenbach
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Annika K Wefers
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Mildred Scheel Cancer Career Center HaTriCS4, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Celina Soltwedel
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Behnam Mohammadi
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Frank Jacobsen
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Martinistr, Hamburg, Germany
| | - Christian Mawrin
- Institute of Neuropathology, University of Magdeburg, Magdeburg, Germany
| | - Jörg Flitsch
- Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Martinistr.52, 20246, Hamburg, Germany
| | - Wolfgang Saeger
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Müller C, Kreissl MC, Klose S, Krause A, Keitel V, Venerito M. Long-term treatment with streptozocin/5-fluorouracil chemotherapy in patients with metastatic pancreatic neuroendocrine tumors: Case series. Medicine (Baltimore) 2022; 101:e28610. [PMID: 35089197 PMCID: PMC8797514 DOI: 10.1097/md.0000000000028610] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 12/30/2021] [Indexed: 01/05/2023] Open
Abstract
RATIONALE Pancreatic neuroendocrine tumors (pNETs) are rare entities representing 1% to 3% of all malignant pancreatic neoplasms. Current guidelines recommend a combination of streptozocin (STZ) and 5-fluorouracil (5-FU) for patients with metastatic well-differentiated pNETs requiring systemic therapy. The highest median progression-free survival rate reported in previous studies for this combination was 23 months (95% confidence interval 14.5-31.5). However, it remains unclear for how long this regimen can be safely administered. PATIENT CONCERNS We report about 3 therapy-naïve patients with metastatic G2 (Ki67 10%-15%) pNETs treated with STZ/5-FU, that achieved sustained disease control for longer than 36 months. DIAGNOSIS Metastatic, well-differentiated G2 pNETs. INTERVENTIONS Systemic chemotherapy with STZ/5-FU was administered until the disease progressed. In 1 case showing a mixed response, selected metastases of increasing size were additionally treated with surgery and brachytherapy. OUTCOMES In our 3 patients with metastatic G2 pNETs, STZ/5-FU induced long-term disease control over 44, 42, and 95 months, respectively. No side effects that led to treatment discontinuation were observed. LESSONS In patients with metastatic G2 pNETs achieving disease control, STZ/5-FU can be safely administered.
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Affiliation(s)
- Christian Müller
- Otto-von-Guericke University Hospital, Department of Gastroenterology, Hepatology and Infectious Diseases, Leipziger Str. 44, Magdeburg, Germany
| | - Michael C. Kreissl
- Otto-von-Guericke University Hospital, Division of Nuclear Medicine, Department of Radiology and Nuclear Medicine, Leipziger Str. 44, Magdeburg, Germany
| | - Silke Klose
- Otto-von-Guericke University Hospital, Department of Nephrology and Hypertension, Diabetes and Endocrinology, Leipziger Str. 44, Magdeburg, Germany
| | - Andreas Krause
- Esteve Pharmaceuticals GmbH, Department of Medicine and Science, Hohenzollerndamm 150-151, Berlin, Germany
| | - Verena Keitel
- Otto-von-Guericke University Hospital, Department of Gastroenterology, Hepatology and Infectious Diseases, Leipziger Str. 44, Magdeburg, Germany
| | - Marino Venerito
- Otto-von-Guericke University Hospital, Department of Gastroenterology, Hepatology and Infectious Diseases, Leipziger Str. 44, Magdeburg, Germany
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Niemann U, Spiliopoulou M, Malanowski J, Kellersmann J, Szczepanski T, Klose S, Dedonaki E, Walter I, Ming A, Mertens PR. Plantar temperatures in stance position: A comparative study with healthy volunteers and diabetes patients diagnosed with sensoric neuropathy. EBioMedicine 2020; 54:102712. [PMID: 32304997 PMCID: PMC7163066 DOI: 10.1016/j.ebiom.2020.102712] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 02/27/2020] [Accepted: 02/27/2020] [Indexed: 12/30/2022] Open
Abstract
Background Microcirculatory defects in diabetes are linked with neuropathy and the onset of diabetic foot syndrome. In this study we quantify pressure- and posture-dependent changes of plantar temperatures as a surrogate of tissue perfusion in healthy volunteers versus diabetes patients diagnosed with neuropathy in the absence of macroangiopathy. Methods Healthy volunteers (n = 31) as well as patients with diabetes diagnosed with severe polyneuropathy (n = 30) were enrolled in a clinical study to test for plantar temperature changes in the feet during extended episodes of standing. These lasted between 5 and 20 min each over 95 min, in between the participants were asked to take a seated position for 5 min and release the pressure from the feet. Major macroangiopathy was excluded before study enrolment. Custom-made insoles harbored temperature and pressure sensors positioned at eight preselected positions for recording. Findings In both subgroups a significant plantar temperature downshift occurred within 10 min of standing, which was especially detected during the initial 45 min of the study protocol. Comparisons between healthy volunteers and patients with diabetes revealed no differences in the magnitude of temperature downshifts during stance episodes. Pressure sensor recordings revealed that healthy volunteers intermittently released pressure during the longer stance episodes due to discomfort, whereas the patients with diabetes and polyneuropathy did not. Interpretation Our findings demonstrate a tight plantar temperature regulation following pressure exposure. In patients with diabetes and peripheral sensoric neuropathy the temperature drop is similar to healthy volunteers. Potentially, prolonged stance periods resulting in less perfused plantar tissue may remain unrecognized with polyneuropathy, whereas discomfort develops in healthy controls. Funding The study was supported by EFRE Förderung der Europäischen Union und Landesmittel des Ministeriums für Wirtschaft, Wissenschaft und Digitalisierung Sachsen-Anhalt (Vorhabennummer: ZS/2016/05/78,615 and ZS/2018/12/95,325). JK and PRM were supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - project ID 97,850,925 - SFB854, AM by the Chinese Scholarship Council (CSC).
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Affiliation(s)
- Uli Niemann
- Faculty of Computer Science, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany.
| | - Myra Spiliopoulou
- Faculty of Computer Science, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - Jan Malanowski
- Clinic of Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, 39116 Magdeburg, Germany
| | - Juliane Kellersmann
- Clinic of Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, 39116 Magdeburg, Germany
| | | | - Silke Klose
- Clinic of Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, 39116 Magdeburg, Germany
| | - Eirini Dedonaki
- Clinic of Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, 39116 Magdeburg, Germany
| | - Isabell Walter
- Clinic of Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, 39116 Magdeburg, Germany
| | - Antao Ming
- Clinic of Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, 39116 Magdeburg, Germany
| | - Peter R Mertens
- Clinic of Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, 39116 Magdeburg, Germany.
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Veres P, Bhat PN, Briggs MS, Cleveland WH, Hamburg R, Hui CM, Mailyan B, Preece RD, Roberts OJ, von Kienlin A, Wilson-Hodge CA, Kocevski D, Arimoto M, Tak D, Asano K, Axelsson M, Barbiellini G, Bissaldi E, Dirirsa FF, Gill R, Granot J, McEnery J, Omodei N, Razzaque S, Piron F, Racusin JL, Thompson DJ, Campana S, Bernardini MG, Kuin NPM, Siegel MH, Cenko SB, O’Brien P, Capalbi M, Daì A, De Pasquale M, Gropp J, Klingler N, Osborne JP, Perri M, Starling RLC, Tagliaferri G, Tohuvavohu A, Ursi A, Tavani M, Cardillo M, Casentini C, Piano G, Evangelista Y, Verrecchia F, Pittori C, Lucarelli F, Bulgarelli A, Parmiggiani N, Anderson GE, Anderson JP, Bernardi G, Bolmer J, Caballero-García MD, Carrasco IM, Castellón A, Segura NC, Castro-Tirado AJ, Cherukuri SV, Cockeram AM, D’Avanzo P, Di Dato A, Diretse R, Fender RP, Fernández-García E, Fynbo JPU, Fruchter AS, Greiner J, Gromadzki M, Heintz KE, Heywood I, van der Horst AJ, Hu YD, Inserra C, Izzo L, Jaiswal V, Jakobsson P, Japelj J, Kankare E, Kann DA, Kouveliotou C, Klose S, Levan AJ, Li XY, Lotti S, Maguire K, Malesani DB, Manulis I, Marongiu M, Martin S, Melandri A, Michałowski MJ, Miller-Jones JCA, Misra K, Moin A, Mooley KP, Nasri S, Nicholl M, Noschese A, Novara G, Pandey SB, Peretti E, del Pulgar CJP, Pérez-Torres MA, Perley DA, Piro L, Ragosta F, Resmi L, Ricci R, Rossi A, Sánchez-Ramírez R, Selsing J, Schulze S, Smartt SJ, Smith IA, Sokolov VV, Stevens J, Tanvir NR, Thöne CC, Tiengo A, Tremou E, Troja E, de Ugarte Postigo A, Valeev AF, Vergani SD, Wieringa M, Woudt PA, Xu D, Yaron O, Young DR. Observation of inverse Compton emission from a long γ-ray burst. Nature 2019; 575:459-463. [DOI: 10.1038/s41586-019-1754-6] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 10/18/2019] [Indexed: 11/09/2022]
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Warnecke D, Schild N, Klose S, Joos H, Brenner R, Kessler O, Skaer N, Walker R, Freutel M, Ignatius A, Dürselen L. Friction properties of a new silk fibroin scaffold for meniscal replacement. Tribol Int 2017; 109:586-592. [PMID: 28469288 PMCID: PMC5327953 DOI: 10.1016/j.triboint.2017.01.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 01/26/2017] [Accepted: 01/29/2017] [Indexed: 05/27/2023]
Abstract
The menisci protect the articular cartilage by reducing contact pressure in the knee. To restore their function after injury, a new silk fibroin replacement scaffold was developed. To elucidate its tribological properties, friction of the implant was tested against cartilage and glass, where the latter is typically used in tribological cartilage studies. The silk scaffold exhibited a friction coefficient against cartilage of 0.056, which is higher than meniscus against cartilage but in range of the requirements for meniscal replacements. Further, meniscus friction against glass was lower than cartilage against glass, which correlated with the surface lubricin content. Concluding, the tribological properties of the new material suggest a possible long-term chondroprotective function. In contrast, glass always produced high, non-physiological friction coefficients.
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Affiliation(s)
- Daniela Warnecke
- Institute of Orthopaedic Research and Biomechanics, Centre for Trauma Research Ulm, Ulm University Medical Centre, Germany
| | - N.B. Schild
- Institute of Orthopaedic Research and Biomechanics, Centre for Trauma Research Ulm, Ulm University Medical Centre, Germany
| | - S. Klose
- Institute of Orthopaedic Research and Biomechanics, Centre for Trauma Research Ulm, Ulm University Medical Centre, Germany
| | - H. Joos
- Division for Biochemistry of Joint and Connective Tissue Diseases, Department of Orthopaedics, Ulm University Medical Centre, Germany
| | - R.E. Brenner
- Division for Biochemistry of Joint and Connective Tissue Diseases, Department of Orthopaedics, Ulm University Medical Centre, Germany
| | - O. Kessler
- Centre of Orthopaedics and Sports, Zurich, Switzerland
- University Medical Centre, Clinic for Orthopaedic Surgery, Magdeburg, Germany
| | | | | | - M. Freutel
- Institute of Orthopaedic Research and Biomechanics, Centre for Trauma Research Ulm, Ulm University Medical Centre, Germany
| | - A. Ignatius
- Institute of Orthopaedic Research and Biomechanics, Centre for Trauma Research Ulm, Ulm University Medical Centre, Germany
| | - L. Dürselen
- Institute of Orthopaedic Research and Biomechanics, Centre for Trauma Research Ulm, Ulm University Medical Centre, Germany
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Barth M, Selig J, Klose S, Kiene L, Raschke S, Akhyari P, Fischer J, Lichtenberg A. Biglycan is Involved in Degenerative Aortic Valve Disease in Diabetic Disorders. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598959] [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)
- M. Barth
- Heinrich Heine University, Medical Faculty, Cardiovascular Surgery, Experimental Surgery, Düsseldorf, Germany
| | - J.I. Selig
- Heinrich Heine University, Medical Faculty, Cardiovascular Surgery, Experimental Surgery, Düsseldorf, Germany
| | - S. Klose
- Heinrich Heine University, Medical Faculty, Cardiovascular Surgery, Experimental Surgery, Düsseldorf, Germany
| | - L.S. Kiene
- Heinrich Heine University, Medical Faculty, Department of Pharmacology and Clinical Pharmacology, Düsseldorf, Germany
| | - S. Raschke
- Heinrich Heine University, Medical Faculty, Cardiovascular Surgery, Experimental Surgery, Düsseldorf, Germany
| | - P. Akhyari
- Heinrich Heine University, Medical Faculty, Cardiovascular Surgery, Experimental Surgery, Düsseldorf, Germany
| | - J.W. Fischer
- Heinrich Heine University, Medical Faculty, Department of Pharmacology and Clinical Pharmacology, Düsseldorf, Germany
| | - A. Lichtenberg
- Heinrich Heine University, Medical Faculty, Cardiovascular Surgery, Experimental Surgery, Düsseldorf, Germany
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Krychowiak M, Adnan A, Alonso A, Andreeva T, Baldzuhn J, Barbui T, Beurskens M, Biel W, Biedermann C, Blackwell BD, Bosch HS, Bozhenkov S, Brakel R, Bräuer T, Brotas de Carvalho B, Burhenn R, Buttenschön B, Cappa A, Cseh G, Czarnecka A, Dinklage A, Drews P, Dzikowicka A, Effenberg F, Endler M, Erckmann V, Estrada T, Ford O, Fornal T, Frerichs H, Fuchert G, Geiger J, Grulke O, Harris JH, Hartfuß HJ, Hartmann D, Hathiramani D, Hirsch M, Höfel U, Jabłoński S, Jakubowski MW, Kaczmarczyk J, Klinger T, Klose S, Knauer J, Kocsis G, König R, Kornejew P, Krämer-Flecken A, Krawczyk N, Kremeyer T, Książek I, Kubkowska M, Langenberg A, Laqua HP, Laux M, Lazerson S, Liang Y, Liu SC, Lorenz A, Marchuk AO, Marsen S, Moncada V, Naujoks D, Neilson H, Neubauer O, Neuner U, Niemann H, Oosterbeek JW, Otte M, Pablant N, Pasch E, Sunn Pedersen T, Pisano F, Rahbarnia K, Ryć L, Schmitz O, Schmuck S, Schneider W, Schröder T, Schuhmacher H, Schweer B, Standley B, Stange T, Stephey L, Svensson J, Szabolics T, Szepesi T, Thomsen H, Travere JM, Trimino Mora H, Tsuchiya H, Weir GM, Wenzel U, Werner A, Wiegel B, Windisch T, Wolf R, Wurden GA, Zhang D, Zimbal A, Zoletnik S. Overview of diagnostic performance and results for the first operation phase in Wendelstein 7-X (invited). Rev Sci Instrum 2016; 87:11D304. [PMID: 27910389 DOI: 10.1063/1.4964376] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Wendelstein 7-X, a superconducting optimized stellarator built in Greifswald/Germany, started its first plasmas with the last closed flux surface (LCFS) defined by 5 uncooled graphite limiters in December 2015. At the end of the 10 weeks long experimental campaign (OP1.1) more than 20 independent diagnostic systems were in operation, allowing detailed studies of many interesting plasma phenomena. For example, fast neutral gas manometers supported by video cameras (including one fast-frame camera with frame rates of tens of kHz) as well as visible cameras with different interference filters, with field of views covering all ten half-modules of the stellarator, discovered a MARFE-like radiation zone on the inboard side of machine module 4. This structure is presumably triggered by an inadvertent plasma-wall interaction in module 4 resulting in a high impurity influx that terminates some discharges by radiation cooling. The main plasma parameters achieved in OP1.1 exceeded predicted values in discharges of a length reaching 6 s. Although OP1.1 is characterized by short pulses, many of the diagnostics are already designed for quasi-steady state operation of 30 min discharges heated at 10 MW of ECRH. An overview of diagnostic performance for OP1.1 is given, including some highlights from the physics campaigns.
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Affiliation(s)
- M Krychowiak
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Adnan
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Alonso
- Laboratorio Nacional de Fusión, CIEMAT, Avenida Complutense, Madrid, Spain
| | - T Andreeva
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J Baldzuhn
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Barbui
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - M Beurskens
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - W Biel
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - C Biedermann
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B D Blackwell
- Australian National University, Acton ACT, 2601 Canberra, Australia
| | - H S Bosch
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - S Bozhenkov
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - R Brakel
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Bräuer
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Brotas de Carvalho
- Instituto de Plasmas e Fusao Nuclear, Avenue Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - R Burhenn
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Cappa
- Laboratorio Nacional de Fusión, CIEMAT, Avenida Complutense, Madrid, Spain
| | - G Cseh
- Wigner Research Centre for Physics, Konkoly Thege 29-33, H-1121 Budapest, Hungary
| | - A Czarnecka
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - A Dinklage
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - P Drews
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - A Dzikowicka
- University of Szczecin, al. Papieża Jana Pawła II 22A, Szczecin, Poland
| | - F Effenberg
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - M Endler
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - V Erckmann
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Estrada
- Laboratorio Nacional de Fusión, CIEMAT, Avenida Complutense, Madrid, Spain
| | - O Ford
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Fornal
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - H Frerichs
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - G Fuchert
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J Geiger
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J H Harris
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - H J Hartfuß
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - D Hartmann
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - D Hathiramani
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - M Hirsch
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - U Höfel
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - S Jabłoński
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - M W Jakubowski
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J Kaczmarczyk
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - T Klinger
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - S Klose
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J Knauer
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - G Kocsis
- Wigner Research Centre for Physics, Konkoly Thege 29-33, H-1121 Budapest, Hungary
| | - R König
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - P Kornejew
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Krämer-Flecken
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - N Krawczyk
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - T Kremeyer
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - I Książek
- Opole University, pl. Kopernika 11a, 45-040 Opole, Poland
| | - M Kubkowska
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - A Langenberg
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - H P Laqua
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - M Laux
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - S Lazerson
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - Y Liang
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - S C Liu
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - A Lorenz
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A O Marchuk
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - S Marsen
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - V Moncada
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - D Naujoks
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - H Neilson
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - O Neubauer
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - U Neuner
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - H Niemann
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J W Oosterbeek
- Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - M Otte
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - E Pasch
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Sunn Pedersen
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - F Pisano
- University of Cagliari, Via Università, 40, 09124 Cagliari, Italy
| | - K Rahbarnia
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - L Ryć
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - O Schmitz
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - S Schmuck
- Culham Science Centre, Abingdon OX14 3DB, United Kingdom
| | - W Schneider
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Schröder
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - H Schuhmacher
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - B Schweer
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - B Standley
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Stange
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - L Stephey
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - J Svensson
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Szabolics
- Wigner Research Centre for Physics, Konkoly Thege 29-33, H-1121 Budapest, Hungary
| | - T Szepesi
- Wigner Research Centre for Physics, Konkoly Thege 29-33, H-1121 Budapest, Hungary
| | - H Thomsen
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J-M Travere
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - H Trimino Mora
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - H Tsuchiya
- NIFS National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - G M Weir
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - U Wenzel
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Werner
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Wiegel
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - T Windisch
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - R Wolf
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - G A Wurden
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - D Zhang
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Zimbal
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - S Zoletnik
- Wigner Research Centre for Physics, Konkoly Thege 29-33, H-1121 Budapest, Hungary
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Niemann U, Spiliopoulou M, Szczepanski T, Samland F, Grützner J, Senk D, Ming A, Kellersmann J, Malanowski J, Klose S, Mertens PR. Comparative Clustering of Plantar Pressure Distributions in Diabetics with Polyneuropathy May Be Applied to Reveal Inappropriate Biomechanical Stress. PLoS One 2016; 11:e0161326. [PMID: 27529421 PMCID: PMC4987010 DOI: 10.1371/journal.pone.0161326] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 08/03/2016] [Indexed: 12/30/2022] Open
Abstract
In diabetic patients, excessive peak plantar pressure has been identified as major risk factor for ulceration. Analyzing plantar pressure distributions potentially improves the identification of patients with a high risk for foot ulceration development. The goal of this study was to classify regional plantar pressure distributions. By means of a sensor-equipped insole, pressure recordings of healthy controls (n = 18) and diabetics with severe polyneuropathy (n = 25) were captured across eight foot regions. The study involved a controlled experimental protocol with multiple sessions, where a session contained several cycles of pressure exposure. Clustering was used to identify subgroups of study participants that are characterized by similar pressure distributions. For both analyzed groups, the number of clusters to best describe the pressure profiles was four. When both groups were combined, analysis again led to four distinct clusters. While three clusters did not separate between healthy and diabetic volunteers the fourth cluster was only represented by diabetics. Here the pressure distribution pattern is characterized by a focal point of pressure application on the forefoot and low pressure on the lateral region. Our data suggest that pressure clustering is a feasible means to identify inappropriate biomechanical plantar stress.
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Affiliation(s)
- Uli Niemann
- Faculty of Computer Science, Otto-von-Guericke University, Magdeburg, Germany
- ifak system GmbH, Magdeburg, Germany
- * E-mail: (UN); (PRM)
| | - Myra Spiliopoulou
- Faculty of Computer Science, Otto-von-Guericke University, Magdeburg, Germany
| | | | | | | | - Dominik Senk
- Clinic for Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University, Magdeburg, Germany
| | - Antao Ming
- Clinic for Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University, Magdeburg, Germany
| | - Juliane Kellersmann
- Clinic for Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University, Magdeburg, Germany
| | - Jan Malanowski
- Clinic for Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University, Magdeburg, Germany
| | - Silke Klose
- Clinic for Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University, Magdeburg, Germany
| | - Peter R. Mertens
- Clinic for Nephrology, Hypertension, Diabetes and Endocrinology, Otto-von-Guericke University, Magdeburg, Germany
- * E-mail: (UN); (PRM)
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Ruf J, von Wedel F, Furth C, Denecke T, Stelter L, Steffen IG, Schütte K, Arend J, Ulrich G, Klose S, Bornschein J, Apostolova I, Amthauer H. Significance of a Single-Time-Point Somatostatin Receptor SPECT/Multiphase CT Protocol in the Diagnostic Work-up of Gastroenteropancreatic Neuroendocrine Neoplasms. J Nucl Med 2015; 57:180-5. [PMID: 26609177 DOI: 10.2967/jnumed.115.161117] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 05/19/2015] [Accepted: 11/11/2015] [Indexed: 02/04/2023] Open
Abstract
UNLABELLED This prospective study compared a 1-d SPECT/CT protocol with the commonly used 3-d protocol for somatostatin receptor scintigraphy in patients with gastroenteropancreatic neuroendocrine neoplasms. Additionally, the influence of SPECT/CT on patient management was evaluated. METHODS From October 2011 to October 2012, all gastroenteropancreatic neuroendocrine neoplasm patients undergoing restaging with somatostatin receptor scintigraphy on a modern SPECT/CT device were enrolled in this study. The protocol consisted of planar imaging at 4, 24, and 48 h; low-dose SPECT/CT at 24 and 48 h; diagnostic CT at 24 h using a triple-phase delay after administration of contrast; and diagnostic SPECT/CT at 24 h. All components of the imaging data were reassessed by 3 masked interpreters. The results were compared with a reference standard based on all clinical, imaging, and histopathology follow-up data available (follow-up range, 24-36 mo; mean, 29.9 mo). The reference standard was defined by a study-specific interdisciplinary tumor board that also reassessed treatment decisions. RESULTS Thirty-one patients were eligible for analysis (18 men and 13 women; mean age, 60.4 y). Ten had no imaging signs of disease and remained disease-free during follow-up. Twenty-one had persistent or recurrent disease (82 lesions: 24 in the liver, 21 in the lymph nodes, 16 in bone, 12 in the pancreas, and 9 in other locations). The respective lesion detection rates for interpreters 1, 2, and 3 were 51.9%, 49.4%, and 71.6% for low-dose SPECT/CT at 24 h; 51.9%, 55.6%, and 67.9% for low-dose SPECT/CT at 48 h; 63.0%, 70.4%, and 85.2% for diagnostic CT; and 77.8%, 84.0%, and 88.9% for diagnostic SPECT/CT. Interobserver agreement was moderate for diagnostic SPECT/CT (κ = 0.44), diagnostic CT (κ = 0.43), low-dose SPECT/CT at 48 h (κ = 0.61), and low-dose SPECT/CT at 24 h (κ = 0.55). For planar imaging, interobserver agreement was fair after 48 h (κ = 0.36) and 24 h (κ = 0.38) and moderate after 4 h (κ = 0.42). Every lesion detectable on planar imaging or low-dose SPECT/CT was also detectable on diagnostic SPECT/CT. The CT and SPECT components of diagnostic SPECT/CT strongly complemented each other, as 34 of 82 lesions (41.4%) were detected on only the CT component or only the SPECT component. Therapeutic management was influenced by the diagnostic SPECT/CT interpretation in 8 of 31 patients (25.8%). CONCLUSION The highest detection rates were achieved by diagnostic SPECT/CT. Thus, a more patient-friendly 1-d protocol is feasible. Furthermore, multiphase SPECT/CT affected management in about a quarter of patients.
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Affiliation(s)
- Juri Ruf
- Klinik für Radiologie und Nuklearmedizin, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany Klinik für Nuklearmedizin, Universitätsklinikum Freiburg, Freiburg, Germany
| | - Friederike von Wedel
- Klinik für Radiologie und Nuklearmedizin, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany
| | - Christian Furth
- Klinik für Radiologie und Nuklearmedizin, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany
| | - Timm Denecke
- Klinik für Strahlenheilkunde, Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Lars Stelter
- Klinik für Strahlenheilkunde, Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Ingo G Steffen
- Klinik für Radiologie und Nuklearmedizin, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany
| | - Kerstin Schütte
- Klinik für Gastroenterologie, Hepatologie und Infektiologie, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany
| | - Jörg Arend
- Klinik für Allgemein-, Viszeral-, und Gefäßchirurgie, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany; and
| | - Gerhard Ulrich
- Klinik für Radiologie und Nuklearmedizin, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany
| | - Silke Klose
- Klinik für Nieren- und Hochdruckkrankheiten, Diabetologie, und Endokrinologie, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany
| | - Jan Bornschein
- Klinik für Gastroenterologie, Hepatologie und Infektiologie, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany
| | - Ivalya Apostolova
- Klinik für Radiologie und Nuklearmedizin, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany
| | - Holger Amthauer
- Klinik für Radiologie und Nuklearmedizin, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany
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Mohnike K, Neumann K, Seidensticker M, Seidensticker R, Bretschneider T, Powerski M, Klose S, Pech M, Ricke J. Ablative und palliative interstitielle Brachytherapie von Nebennierenmalignomen: Effektivität und Sicherheit. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1551046] [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: 10/23/2022]
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11
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Preininger R, Schmuhl C, Heller A, Klose S, Mertens P. [Surgery Meets Nephrology: Opioid Therapy of Patients with Renal Failure]. Zentralbl Chir 2014; 141:82-3. [PMID: 25393735 DOI: 10.1055/s-0034-1382844] [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: 10/24/2022]
Affiliation(s)
- R Preininger
- Klinik für Nephrologie, Hypertension, Diabetes und Endokrinologie, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
| | - C Schmuhl
- Klinik für Nephrologie, Hypertension, Diabetes und Endokrinologie, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
| | - A Heller
- Klinik für Nephrologie, Hypertension, Diabetes und Endokrinologie, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
| | - S Klose
- Klinik für Nephrologie, Hypertension, Diabetes und Endokrinologie, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
| | - P Mertens
- Klinik für Nephrologie, Hypertension, Diabetes und Endokrinologie, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
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Jannasch O, Voigt C, Klose S, Meyer F, Mroczkowski P. [Unicentre Results in Surgery of Primary Hyperparathyroidism with Postoperative Long-Term Follow-Up and Value of Intraoperative Quick Parathormone Test]. Zentralbl Chir 2014; 141:175-82. [PMID: 25333517 DOI: 10.1055/s-0034-1368541] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
BACKGROUND The increasing use of focussed parathyroidectomy is attributed to introduction of intraoperative parathyroid hormone measurement (ioPTH) and novel preoperative imaging techniques. This study assesses the early postoperative and long-term outcomes of surgery and the value of standardised ioPTH in patients undergoing surgery for primary hyperparathyroidism (pHPT). METHODS From 01/01/1996 to 09/30/2011, all consecutive patients undergoing surgery for pHPT were documented. Data of this observational study were retrospectively evaluated. Patients were subdivided into 2 groups: A.) use of Quick Intraoperative Intact PTH Assay (n = 142; "ioPTH group") vs. B.) control group ("CG", n = 44). For clinical long-term follow-up, also pre- and postoperative signs, symptoms and findings of the initial 43 patients obtained during the first 4 years of the study were semiquantitatively compared. RESULTS 186 consecutive operations for pHPT were performed - in particular, 73 sole parathyroidectomies; 113 combined thyroid and parathyroid resections. Mean operation time was 87 (SD ± 48) min for parathyroidectomy and 120 (SD ± 49) min for combined resections. A persisting hypercalcaemia was found in 16 patients (8.6%) while postoperative elevation of serum calcium and parathormone occurred in 7 patients (3.8%). Postoperative hypocalcaemia was present in 35 patients (18.8%). Differences between both groups regarding hypocalcaemia (p = 1.0), hypercalcaemia (p = 0.67), hyperparathyrinaemia (p = 0.12) and rate of reintervention (p = 0.055) were not significant. Thirty nine of the initial 43 patients reported one or more signs of pHPT (90.7%). Most frequent symptoms were nephrolithiasis (41.9%), back pain (51.2%), discomfort in the upper abdomen (41.9%), fatigue (41.9%) and general weakness (61.1%). Follow-up investigations (mean, 4.7 [range, 3.2-6.5] years) revealed that 65 % of patients reported improvement of general condition, 27% had no change and 8% reported deterioration. CONCLUSIONS IoPTH is now standard in parathyroid surgery. Value of ioPTH correlates directly with selected centre-specific intraoperative criteria. The stricter the criteria the more reliable is the exclusion of multiglandular disease. Surgery for pHPT was performed with a very low complication rate. Through the long-term follow-up, nearly two thirds of patients benefited from the operation.
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Affiliation(s)
- O Jannasch
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A. ö. R., Deutschland
| | - C Voigt
- Vitos Orthopädische Klinik Kassel gGmbH, Deutschland
| | - S Klose
- Klinik für Nieren- und Hochdruckkrankheiten, Diabetologie und Endokrinologie, Universitätsklinikum Magdeburg A. ö. R., Deutschland
| | - F Meyer
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A. ö. R., Deutschland
| | - P Mroczkowski
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A. ö. R., Deutschland
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13
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Jahn O, Wex T, Klose S, Kropf S, Adolf D, Piatek S. Cathepsin K in treatment monitoring following intravenous zoledronic acid. Biomed Rep 2014; 2:915-917. [PMID: 25279169 DOI: 10.3892/br.2014.360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 07/23/2014] [Accepted: 08/27/2014] [Indexed: 12/12/2022] Open
Abstract
Cathepsin K (CatK) is mainly expressed by osteoclasts and plays an important role in bone resorption. As CatK is expressed and secreted by osteoclasts during active bone resorption, it may be a useful and specific biochemical marker of osteoclastic activity. Therefore, CatK serum levels were studied for monitoring the treatment of females with postmenopausal osteoporosis by zoledronic acid. The serum CatK levels were determined in nine postmenopausal females before and after 3, 6 and 12 months of treatment. The levels were significantly reduced after 3 and 6 months (P<0.05), whereas they returned to baseline after 1 year. Taken together, the serum level of CatK may be suitable for monitoring anti-osteoporotic therapy in association with treatment response.
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Affiliation(s)
- Oliver Jahn
- Department of Trauma Surgery, Otto von Guericke University, D-39120 Magdeburg, Germany
| | - Thomas Wex
- Department of Gastroenterology, Hepatology and Infectious Diseases, Otto von Guericke University, D-39120 Magdeburg, Germany ; Medical Laboratory for Clinical Chemistry, Microbiology and Infectious Diseases, Department Molecular Genetics, Otto von Guericke University, D-39124 Magdeburg, Germany
| | - Silke Klose
- Department of Nephrology, Hypertension, Endocrinology and Metabolic Diseases, Otto von Guericke University, D-39120 Magdeburg, Germany
| | - Siegfried Kropf
- Department of Biometry and Medical Informatics, Otto von Guericke University, D-39120 Magdeburg, Germany
| | - Daniela Adolf
- Department of Biometry and Medical Informatics, Otto von Guericke University, D-39120 Magdeburg, Germany
| | - Stefan Piatek
- Department of Trauma Surgery, Otto von Guericke University, D-39120 Magdeburg, Germany
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Abstract
Typ 2 diabetes mellitus (T2DM) can be regarded as a chronic and progressive disease which is rapidly increasing worldwide. There is a significant coincidence of T2DM and obesity, the latter playing a major role in the development of insulin resistance. Medical treatment comprises lifestyle counseling, weight management and an increased physical activity, frequently in combination with pharmacotherapy. However, especially in obese patients, metabolic aims are frequently not achieved which can be attributed to the lack of significant weight reduction. Currently, pancreas transplantation plays only a minor role in the treatment of patients with T2DM. Bariatric surgery has been proven to be a safe and effective therapeutic option in obese patients that leads to a significant weight loss. Moreover, in the majority of obese diabetics, a complete or partial remission of T2DM is observed. The significant weight loss is associated with improved insulin sensitivity. There is some evidence that alterations of gut hormones play an additional role in the amelioration of T2DM. However, little is known about the long-term effect of bariatric surgery on diabetes remission. Bariatric procedures should be considered in obese patients with T2DM (BMI > 35 kg/m²) and poorly controlled metabolic status. Despite the encouraging results in normal weight or overweight patients with T2DM, surgery can not yet be recommended in these patients. Intensive research about the impact of bariatric surgery on diabetes remission offers a unique opportunity to understand pathophysiology of T2DM. Furthermore, it may help to develop less invasive interventions and to identify new therapeutic targets for the treatment of T2DM.
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Affiliation(s)
- F Benedix
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg
| | - F Meyer
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg
| | - S Klose
- Universitätsklinik für Nieren- und Hochdruckkrankheiten, Diabetologie und Endokrinologie, Universitätsklinikums Magdeburg
| | - C Stroh
- Klinik für Chirurgie, SRH Wald-Klinikum Gera
| | - H Lippert
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg
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Dillner J, Meyer F, Lippert H, Huth C, Klose S, Roessner A, Halloul Z. [Carcinoma of the pararenal gland infiltrating the surrounding tissue and involving the inferior vena cava]. Aktuelle Urol 2013; 44:375-80. [PMID: 24043537 DOI: 10.1055/s-0033-1351306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
UNLABELLED ▼HISTORY AND ADMISSION FI NDINGS: A 61-year-old woman presented with a 2-month-history of progressive deterioration, increasing exertional dyspnoea and pain in the right upper abdomen (past medical history: bronchial asthma and hypertension). The physical examination showed mild generalized weakness, tenderness in the right upper abdomen, and ascites. INVESTIGATIONS Laboratory studies did not reveal any hormonal abnormalities. A CT angiogram revealed a mass of the right adrenal gland with distinct invasion into the inferior vena cava, and tumour thrombosis that extended proximally into the right atrium. Distally, the tumour ended at the caudate lobe of the liver with an extensive peripherally engulfed thrombus from the inferior vena cava down to the common iliac -veins. TREATMENT AND COURSE An open right adrenalectomy with resection of the periadrenal tissue and exstirpation of the intracaval tumour thrombus (by cavotomy under digital occlusion of the blood flow from the vena cava into the right atrium - cardiac surgeon) was carried out with no significant postoperative complications. Subsequently, the patient underwent adjuvant mitotane therapy for 3 years. So far, no recurrence has occurred during a course of 7 years. CONCLUSION Tumour induced thrombotic occlusion of the inferior vena cava and other veins is rare, especially with right atrium involvement. In the absence of other effective treatment options, the combination of radical resection and adjuvant mitotane therapy remains the only successful curative treatment for primary invasive pararenal gland carcinoma.
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Affiliation(s)
- J. Dillner
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A. ö. R
| | - F. Meyer
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A. ö. R
| | - H. Lippert
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A. ö. R
| | - C. Huth
- Klinik für Herz- und Thoraxchirurgie, Universitätsklinikum Magdeburg A. ö. R
| | - S. Klose
- Klinik für Nieren- und Hochdruckkrankheiten, Diabetologie und Endokrinologie, Universitätsklinikum Magdeburg A. ö. R
| | - A. Roessner
- Institut für Pathologie, Universitätsklinikum Magdeburg A. ö. R
| | - Z. Halloul
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A. ö. R
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Piatek S, Wex T, Adolf D, Klose S, Westphal S, Amthauer H, Halangk W, Jahn O, Riebau C, Winckler S. Präventive Knochendichtemessung bei postmenopausalen Frauen. Unfallchirurg 2013; 116:596-601. [DOI: 10.1007/s00113-012-2169-0] [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: 10/28/2022]
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Piatek S, Adolf D, Wex T, Halangk W, Klose S, Westphal S, Amthauer H, Winckler S. Multiparameter analysis of serum levels of C-telopeptide crosslaps, bone-specific alkaline phosphatase, cathepsin K, osteoprotegerin and receptor activator of nuclear factor κB ligand in the diagnosis of osteoporosis. Maturitas 2013; 74:363-8. [DOI: 10.1016/j.maturitas.2013.01.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 12/17/2012] [Accepted: 01/08/2013] [Indexed: 10/27/2022]
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Maasberg S, Klose S, Weber F, Metzner C, Hörsch D, Schott M, Weber MM, Auernhammer C, Pape UF, Goretzki P. Clinical outcome of poorly differentiated (neuro)-endocrine carcinomas (NEC-G3) in a multi-center cohort from Germany. Exp Clin Endocrinol Diabetes 2013. [DOI: 10.1055/s-0033-1336764] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Dillner J, Meyer F, Lippert H, Huth C, Klose S, Roessner A, Halloul Z. [Organ-invasive carcinoma of the pararenal gland involving the inferior vena cava: successful curative and interdisciplinary surgical management]. Dtsch Med Wochenschr 2013; 138:260-5. [PMID: 23361348 DOI: 10.1055/s-0032-1332842] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
HISTORY AND ADMISSION FINDINGS A 61-year-old woman presented with a 2-month-history of progressive deterioration, increasing exertional dyspnoea and pain in the right upper abdomen (past medical history: bronchial asthma and hypertension). The physical examination showed mild generalized weakness, tenderness in the right upper abdomen, and ascites. INVESTIGATIONS Laboratory studies did not reveal any hormonal abnormalities. A CT angiogram revealed a mass of the right adrenal gland with distinct invasion into the inferior vena cava, and tumour thrombosis that extended proximally into the right atrium. Distally, the tumour ended at the caudate lobe of the liver with an extensive peripherally engulfed thrombus from the inferior vena cava down to the common iliac veins. TREATMENT AND COURSE An open right adrenalectomy with resection of the periadrenal tissue and extirpation of the intracaval tumour thrombus (by cavotomy under digital occlusion of the blood flow from the vena cava into the right atrium) was carried out with no significant postoperative complications. Subsequently, the patient underwent adjuvant mitotane therapy for three years. So far, no recurrence has occurred during a course of 7 years. CONCLUSION Tumour induced thrombotic occlusion of the inferior vena cava and other veins is rare, especially with right atrium involvement. In the absence of other effective treatment options, the combination of radical resection and adjuvant mitotane therapy remains the only successful curative treatment for primary invasive adrenal gland carcinoma.
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Affiliation(s)
- J Dillner
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A. ö. R
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Erdogan I, Deutschbein T, Jurowich C, Kroiss M, Ronchi C, Quinkler M, Waldmann J, Willenberg HS, Beuschlein F, Fottner C, Klose S, Heidemeier A, Brix D, Fenske W, Hahner S, Reibetanz J, Allolio B, Fassnacht M. The role of surgery in the management of recurrent adrenocortical carcinoma. J Clin Endocrinol Metab 2013; 98:181-91. [PMID: 23150691 DOI: 10.1210/jc.2012-2559] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Surgery is the standard of care for localized adrenocortical carcinomas, but its role for recurrent disease is not well defined. OBJECTIVE Our objective was to evaluate clinical outcome after surgery for recurrence. DESIGN We conducted a retrospective analysis in 154 patients with first recurrence after initial radical resection from the German Adrenocortical Carcinoma Registry. MAIN OUTCOME MEASURES We evaluated progression-free survival (PFS) and overall survival (OS) by Kaplan-Meier method and identified prognostic factors by Cox regression analysis. RESULT A total of 101 patients underwent repeated surgery (radical resection, n = 78), and 99 received (additional) nonsurgical therapy. After a median of 6 (1-221) months, 144 patients (94%) experienced progression. Multivariate analysis adjusted for age, sex, tumor burden, time to first recurrence (TTFR), surgery for recurrence (including resection status), and additional therapy indicated that only two factors were significantly associated with shorter PFS [hazard ratio for progression: for TTFR ≤ 12 months, 1.8 (95% confidence interval = 1.3-2.6) vs. TTFR > 12 months; for macroscopically incomplete resection, 3.4 (1.5-7.9), and for no surgery, 3.4 (1.6-7.0) vs. microscopically complete (R0)-resection and OS [hazard ratio for death: for TTFR > 12 months, 3.1 (2.0-4.7) vs. TTFR ≤ 12 months; for macroscopically incomplete resection, 2.7 (1.1-6.9), and no surgery, 4.2 (1.8-9.6) vs. R0-resection]. Patients who had both TTFR over 12 months and R0-resection of recurrent tumors (n = 22) had the best prognosis (median PFS, 24 months; median OS, >60 months). CONCLUSIONS The best predictors of prolonged survival after first recurrence are TTFR over 12 months and R0-resection. Our data suggest that patients with longer TTFR and tumors amenable to radical resection should be operated, whereas individualized treatment decisions are needed for patients with short TTFR or with not completely resectable tumors.
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Affiliation(s)
- Ilknur Erdogan
- Department of Internal Medicine I, Endocrine and Diabetes Unit, University Hospital Würzburg, University of Würzburg, Oberdürrbacher Strasse 6, D-97080 Würzburg, Germany
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Blaik A, Luley C, Klose S, Reschke K, Isermann B, Westphal S. Nachhaltigkeit des telemedizinischen ABC-Programms zur Gewichtsreduktion bei Typ-2-Diabetikern. DIABETOL STOFFWECHS 2012. [DOI: 10.1055/s-0032-1314509] [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: 10/28/2022]
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Abstract
BACKGROUND The clinical picture of pituitary abscesses may resemble features of other pituitary pathologies including endocrine deficiencies. The characteristic radiological changes, namely the ring enhancement, may aid in the diagnostic work-up of this very rare condition. CASE REPORT A 40-year-old patient with longstanding HIV infection presented with headache and fatigue. Testing for pituitary function confirmed panhypopitutarism. MRI scanning demonstrated an inhomogeneous pituitary gland with ring-like enhancement and sphenoid sinus mucosa thickening. Transsphenoidal surgery was performed. Histologically CD68 positive macrophages were found supporting the diagnosis of infectious hypophysitis. Under hormone replacement therapy and retroviral treatment the patient clinically normalized. CONCLUSION A pituitary abscess due to infectious hypophysitis is a rare cause of pituitary failure. Diagnostic signs on imaging may help to rapidly distinguish the cause of pituitary deficiency in patients with HIV infection.
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Affiliation(s)
- B Harbeck
- University Hospital of Lübeck, Department of Medicine, Lübeck, Germany.
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Luley C, Blaik A, Reschke K, Klose S, Westphal S. Weight loss in obese patients with type 2 diabetes: effects of telemonitoring plus a diet combination - the Active Body Control (ABC) Program. Diabetes Res Clin Pract 2011; 91:286-92. [PMID: 21168231 DOI: 10.1016/j.diabres.2010.11.020] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Revised: 10/14/2010] [Accepted: 11/16/2010] [Indexed: 02/07/2023]
Abstract
AIMS We evaluate the efficacy of the "Active Body Control (ABC) Program" for weight reduction in patients with type 2 diabetes. METHODS The ABC program combines telemonitoring of the physical activity with a low-calorie diet also preferring carbohydrates with low glycemic indexes. In this 6-month, randomized, clinical trial 35 patients (aged 57 ± 9 years; BMI=35.3 ± 5.7 kg/m(2)) were treated according to the ABC program and 35 control patients (aged 58 ± 7 years; BMI=34.8 ± 5.9 kg/m(2)) received standard therapy. RESULTS After 6 months the mean weight loss in the intervention group was 11.8 kg ± 8.0 kg. Glucose and HbA1c were lowered by respectively 1.0 mmol/l and 0.8 percentage points (p=0.000, respectively). The proportion of patients with HbA1c>7% fell from 57% to 26%. Antidiabetic drugs were discontinued in 13 patients (39%) and reduced in 14 (42%). The reduction of costs on medication per patient was € 83 in 6 months. In the control group, there were no relevant changes in body weight, laboratory values or drug treatment. CONCLUSIONS The ABC program effectively lowers body weight, Hb1Ac and antidiabetic drug use in patients with type 2 diabetes.
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Affiliation(s)
- Claus Luley
- Institute of Clinical Chemistry, Otto-von-Guericke-University Magdeburg, 39120 Magdeburg, Leipziger Strasse 44, Germany
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Arenholz E, Kirchebner A, Klose S, Heitz J, Bäuerle D. Deposition of Ablation Products from UV-Laser Irradiated Polymer Surfaces. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-526-385] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractThe growth and structure of surface dendrites observed after UV-Iaser irradiation of polyethylene-terephthalate (PET) have been investigated. The lateral size and structure of dendrites is strongly influenced by the laser wavelength and ambient pressure. Pressure-dependent experiments demonstrate the importance of redeposition of ablation products onto the laser-modified surface. Different possible growth mechanisms are discussed.
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Luley C, Blaik A, Reschke K, Klose S, Lins N, Westphal S. Telemonitoring der körperlichen Aktivität ist eine effektive Maßnahme zur Gewichtsreduktion. DIABETOL STOFFWECHS 2010. [DOI: 10.1055/s-0030-1253970] [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: 10/19/2022]
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26
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Motzkau M, Meyer P, Mertens PR, Klose S. Maturity-onset Diabetes of the Young Type 1 (MODY 1) mit bisher unbekannter Genmutation im Gen HNF-4α. DIABETOL STOFFWECHS 2010. [DOI: 10.1055/s-0030-1253948] [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: 10/19/2022]
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Erlic Z, Rybicki L, Peczkowska M, Golcher H, Kann PH, Brauckhoff M, Müssig K, Muresan M, Schäffler A, Reisch N, Schott M, Fassnacht M, Opocher G, Klose S, Fottner C, Forrer F, Plöckinger U, Petersenn S, Zabolotny D, Kollukch O, Yaremchuk S, Januszewicz A, Walz MK, Eng C, Neumann HPH. Clinical predictors and algorithm for the genetic diagnosis of pheochromocytoma patients. Clin Cancer Res 2009; 15:6378-85. [PMID: 19825962 DOI: 10.1158/1078-0432.ccr-09-1237] [Citation(s) in RCA: 142] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PURPOSE Six pheochromocytoma susceptibility genes causing distinct syndromes have been identified; approximately one of three of all pheochromocytoma patients carry a predisposing germline mutation. When four major genes (VHL, RET, SDHB, SDHD) are analyzed in a clinical laboratory, costs are approximately $3,400 per patient. The aim of the study is to systematically obtain a robust algorithm to identify who should be genetically tested, and to determine the order in which genes should be tested. EXPERIMENTAL DESIGN DNA from 989 apparently nonsyndromic patients were scanned for germline mutations in the genes VHL, RET, SDHB, SDHC, and SDHD. Clinical parameters were analyzed as potential predictors for finding mutations by multiple logistic regression, validated by bootstrapping. Cost reduction was calculated between prioritized gene testing compared with that for all genes. RESULTS Of 989 apparently nonsyndromic pheochromocytoma cases, 187 (19%) harbored germline mutations. Predictors for presence of mutation are age <45 years, multiple pheochromocytoma, extra-adrenal location, and previous head and neck paraganglioma. If we used the presence of any one predictor as indicative of proceeding with gene testing, then 342 (34.6%) patients would be excluded, and only 8 carriers (4.3%) would be missed. We were also able to statistically model the priority of genes to be tested given certain clinical features. E.g., for patients with prior head and neck paraganglioma, the priority would be SDHD>SDHB>RET>VHL. Using the clinical predictor algorithm to prioritize gene testing and order, a 44.7% cost reduction in diagnostic process can be achieved. CONCLUSIONS Clinical parameters can predict for mutation carriers and help prioritize gene testing to reduce costs in nonsyndromic pheochromocytoma presentations.
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Affiliation(s)
- Zoran Erlic
- Department of Nephrology, Section of Preventive Medicine, Albert-Ludwigs-University, Hugstetter Strasse 55, Freiburg, Germany
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Castro-Tirado AJ, de Ugarte Postigo A, Gorosabel J, Jelínek M, Fatkhullin TA, Sokolov VV, Ferrero P, Kann DA, Klose S, Sluse D, Bremer M, Winters JM, Nuernberger D, Pérez-Ramírez D, Guerrero MA, French J, Melady G, Hanlon L, McBreen B, Leventis K, Markoff SB, Leon S, Kraus A, Aceituno FJ, Cunniffe R, Kubánek P, Vítek S, Schulze S, Wilson AC, Hudec R, Durant M, González-Pérez JM, Shahbaz T, Guziy S, Pandey SB, Pavlenko L, Sonbas E, Trushkin SA, Bursov NN, Nizhelskij NA, Sánchez-Fernández C, Sabau-Graziati L. Flares from a candidate Galactic magnetar suggest a missing link to dim isolated neutron stars. Nature 2008; 455:506-9. [DOI: 10.1038/nature07328] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 07/31/2008] [Indexed: 11/09/2022]
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Abstract
Carney complex (CNC) is a multiple neoplasia syndrome characterised by endocrine tumours, spotty skin pigmentation, cardiac and other myxomas, psamommatous and pigmented schwannomas, large cell calcifying Sertoli cell tumours, and mammary ductal adenomas and other more rare lesions. CNC is inherited in an autosomal-dominant manner and has been mapped to at least two chromosomal loci. Patients who map to the CNC1 locus located on chromosome 17 carry inactivating mutations of the PRKAR1A gene that encodes the cAMP-dependent protein kinase regulatory subunit type 1-alpha (Kirschner et al., 2000). One gene responsible for type 2 (CNC2) is located on chromosome 2p16. Infertility in CNC can be caused by a number of factors; there is evidence that prkar1a deficiency in mice leads directly to infertility (Burton et al., 2006), but patients with CNC also have Sertoli cell tumours and a number of other reasons to affect fertility. We report on an infertile male with CNC and present evidence that male infertility should be considered as part of the phenotype of CNC.
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Affiliation(s)
- P Wieacker
- Institute of Human Genetics, Otto von Guericke University, Magdeburg, Germany.
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Abstract
As rare and thus often overlooked hormone-secreting tumors, pheochromocytomas pose a particular diagnostic challenge. Difficulties involve biochemical confirmation, localizing, and detection of malignancy. Measurement of free plasma metanephrines, genetic testing and specific imaging procedures--such as MIBG and octreotide scintigraphy or fluorodopamine PET--represent a considerable progress, and the management of benign pheochromocytomas has become very effective. However, a comparable improvement in the prognosis of malignant chromaffin cell tumors, which occur in approximately 10-15% of all cases, has not yet been achieved. Here, telomerase catalytic subunit (hTERT) activity and heat shock protein 90 expression could serve both as molecular markers allowing an earlier diagnosis of malignancy and as therapeutic targets. Familial syndromes should be considered both in benign and malignant pheochromocytoma, and should be tested for prior to surgery in selected patient groups.
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Affiliation(s)
- T Scholz
- Department of Endocrinology and Metabolism, Magdeburg University Medical School
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31
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Affiliation(s)
- H Lehnert
- Warwick Medical School, Coventry University Hospital, Coventry, UK.
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Pian E, Mazzali PA, Masetti N, Ferrero P, Klose S, Palazzi E, Ramirez-Ruiz E, Woosley SE, Kouveliotou C, Deng J, Filippenko AV, Foley RJ, Fynbo JPU, Kann DA, Li W, Hjorth J, Nomoto K, Patat F, Sauer DN, Sollerman J, Vreeswijk PM, Guenther EW, Levan A, O'Brien P, Tanvir NR, Wijers RAMJ, Dumas C, Hainaut O, Wong DS, Baade D, Wang L, Amati L, Cappellaro E, Castro-Tirado AJ, Ellison S, Frontera F, Fruchter AS, Greiner J, Kawabata K, Ledoux C, Maeda K, Møller P, Nicastro L, Rol E, Starling R. An optical supernova associated with the X-ray flash XRF 060218. Nature 2006; 442:1011-3. [PMID: 16943831 DOI: 10.1038/nature05082] [Citation(s) in RCA: 393] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2006] [Accepted: 07/10/2006] [Indexed: 11/09/2022]
Abstract
Long-duration gamma-ray bursts (GRBs) are associated with type Ic supernovae that are more luminous than average and that eject material at very high velocities. Less-luminous supernovae were not hitherto known to be associated with GRBs, and therefore GRB-supernovae were thought to be rare events. Whether X-ray flashes--analogues of GRBs, but with lower luminosities and fewer gamma-rays--can also be associated with supernovae, and whether they are intrinsically 'weak' events or typical GRBs viewed off the axis of the burst, is unclear. Here we report the optical discovery and follow-up observations of the type Ic supernova SN 2006aj associated with X-ray flash XRF 060218. Supernova 2006aj is intrinsically less luminous than the GRB-supernovae, but more luminous than many supernovae not accompanied by a GRB. The ejecta velocities derived from our spectra are intermediate between these two groups, which is consistent with the weakness of both the GRB output and the supernova radio flux. Our data, combined with radio and X-ray observations, suggest that XRF 060218 is an intrinsically weak and soft event, rather than a classical GRB observed off-axis. This extends the GRB-supernova connection to X-ray flashes and fainter supernovae, implying a common origin. Events such as XRF 060218 are probably more numerous than GRB-supernovae.
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Affiliation(s)
- E Pian
- Istituto Nazionale di Astrofisica, Trieste Astronomical Observatory, via G. B. Tiepolo 11, I-34131 Trieste, Italy.
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Lehnert H, Klose S, Lobmann R, Zehnder D. [Microalbuminuria in diabetes: setting the points for treatment]. MMW Fortschr Med 2006; 148:28-30, 33; quiz 34. [PMID: 16796185] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Both type 1 and type 2 diabetes mellitus have a cumulative risk of 25-40% for the development of microalbuminuria 25 years into the disease. In type 2 diabetes micro- and macroangiopathic complications, and frequently hypertension, may also develop. This means that the risk of a type 2 diabetic with microalbuminuria of developing cardiovascular disease is three times greater than that of a diabetic with no renal involvement. Annual screening for microalbuminuria should therefore be obligatory. An increasing albumin excretion rate (AER) is considered an indication for an elevated cardiovascular risk. Studies have shown that the rate of cardiovascular events in diabetics with microalbuminuria and hypertension can be reduced only by the combined treatment of hypertension, hyperglycemia, hyperlipidemia and microalbuminuria.
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Schwarz H, Klose S, Schmidt E. Ein ungewöhnlicher Fall einer Bettfedernalveolitis. Pneumologie 2006. [DOI: 10.1055/s-2006-933902] [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: 10/19/2022]
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Haislip JB, Nysewander MC, Reichart DE, Levan A, Tanvir N, Cenko SB, Fox DB, Price PA, Castro-Tirado AJ, Gorosabel J, Evans CR, Figueredo E, MacLeod CL, Kirschbrown JR, Jelinek M, Guziy S, de Ugarte Postigo A, Cypriano ES, LaCluyze A, Graham J, Priddey R, Chapman R, Rhoads J, Fruchter AS, Lamb DQ, Kouveliotou C, Wijers RAMJ, Bayliss MB, Schmidt BP, Soderberg AM, Kulkarni SR, Harrison FA, Moon DS, Gal-Yam A, Kasliwal MM, Hudec R, Vitek S, Kubanek P, Crain JA, Foster AC, Clemens JC, Bartelme JW, Canterna R, Hartmann DH, Henden AA, Klose S, Park HS, Williams GG, Rol E, O'Brien P, Bersier D, Prada F, Pizarro S, Maturana D, Ugarte P, Alvarez A, Fernandez AJM, Jarvis MJ, Moles M, Alfaro E, Ivarsen KM, Kumar ND, Mack CE, Zdarowicz CM, Gehrels N, Barthelmy S, Burrows DN. A photometric redshift of z = 6.39 ± 0.12 for GRB 050904. Nature 2006; 440:181-3. [PMID: 16525465 DOI: 10.1038/nature04552] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2005] [Accepted: 12/12/2005] [Indexed: 11/09/2022]
Abstract
Gamma-ray bursts (GRBs) and their afterglows are the most brilliant transient events in the Universe. Both the bursts themselves and their afterglows have been predicted to be visible out to redshifts of z approximately 20, and therefore to be powerful probes of the early Universe. The burst GRB 000131, at z = 4.50, was hitherto the most distant such event identified. Here we report the discovery of the bright near-infrared afterglow of GRB 050904 (ref. 4). From our measurements of the near-infrared afterglow, and our failure to detect the optical afterglow, we determine the photometric redshift of the burst to be z = 6.39 - 0.12 + 0.11 (refs 5-7). Subsequently, it was measured spectroscopically to be z = 6.29 +/- 0.01, in agreement with our photometric estimate. These results demonstrate that GRBs can be used to trace the star formation, metallicity, and reionization histories of the early Universe.
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Affiliation(s)
- J B Haislip
- Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Campus Box 3255, Chapel Hill, North Carolina 27599, USA
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Abstract
Carotid artery aneurysms represent a very rare cause of pituitary failure. We describe the case of a female patient harbouring a giant aneurysm of the left carotid artery that subsequently led to panhypopituitarism. Interestingly, the late postoperative course was complicated by severe hyponatremia, whose origin may have been due to inappropriate ADH secretion. This case illustrates the problems of diagnosis and postoperative handling of panhypopituitarism due to an intrasellar aneurysm.
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Affiliation(s)
- S Klose
- Department of Endocrinology and Metabolism, Magdeburg University Medical School, Germany
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Gehrels N, Sarazin CL, O'Brien PT, Zhang B, Barbier L, Barthelmy SD, Blustin A, Burrows DN, Cannizzo J, Cummings JR, Goad M, Holland ST, Hurkett CP, Kennea JA, Levan A, Markwardt CB, Mason KO, Meszaros P, Page M, Palmer DM, Rol E, Sakamoto T, Willingale R, Angelini L, Beardmore A, Boyd PT, Breeveld A, Campana S, Chester MM, Chincarini G, Cominsky LR, Cusumano G, de Pasquale M, Fenimore EE, Giommi P, Gronwall C, Grupe D, Hill JE, Hinshaw D, Hjorth J, Hullinger D, Hurley KC, Klose S, Kobayashi S, Kouveliotou C, Krimm HA, Mangano V, Marshall FE, McGowan K, Moretti A, Mushotzky RF, Nakazawa K, Norris JP, Nousek JA, Osborne JP, Page K, Parsons AM, Patel S, Perri M, Poole T, Romano P, Roming PWA, Rosen S, Sato G, Schady P, Smale AP, Sollerman J, Starling R, Still M, Suzuki M, Tagliaferri G, Takahashi T, Tashiro M, Tueller J, Wells AA, White NE, Wijers RAMJ. A short γ-ray burst apparently associated with an elliptical galaxy at redshift z = 0.225. Nature 2005; 437:851-4. [PMID: 16208363 DOI: 10.1038/nature04142] [Citation(s) in RCA: 471] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2005] [Accepted: 08/10/2005] [Indexed: 11/08/2022]
Abstract
Gamma-ray bursts (GRBs) come in two classes: long (> 2 s), soft-spectrum bursts and short, hard events. Most progress has been made on understanding the long GRBs, which are typically observed at high redshift (z approximately 1) and found in subluminous star-forming host galaxies. They are likely to be produced in core-collapse explosions of massive stars. In contrast, no short GRB had been accurately (< 10'') and rapidly (minutes) located. Here we report the detection of the X-ray afterglow from--and the localization of--the short burst GRB 050509B. Its position on the sky is near a luminous, non-star-forming elliptical galaxy at a redshift of 0.225, which is the location one would expect if the origin of this GRB is through the merger of neutron-star or black-hole binaries. The X-ray afterglow was weak and faded below the detection limit within a few hours; no optical afterglow was detected to stringent limits, explaining the past difficulty in localizing short GRBs.
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Affiliation(s)
- N Gehrels
- NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
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Klose S, Reschke K, Lehnert H. Severe non-alcoholic fatty liver disease and hepatopulmonary syndrome as a rare complication of craniopharyngeoma. Exp Clin Endocrinol Diabetes 2005. [DOI: 10.1055/s-2005-862899] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Rotte M, Baerecke C, Pottag G, Klose S, Kanneberg E, Heinze HJ, Lehnert H. Insulin affects the neuronal response in the medial temporal lobe in humans. Neuroendocrinology 2005; 81:49-55. [PMID: 15809512 DOI: 10.1159/000084874] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2004] [Accepted: 02/01/2005] [Indexed: 12/29/2022]
Abstract
In recent years, clear evidence has accumulated that insulin affects central nervous functions. Besides controlling metabolic processes such as energy homeostasis by the regulation of food intake through hypothalamic receptors, the peptide hormone also appears to be capable of modulating cognitive functions. Experimental and clinical evidence for insulin supports effects on learning and memory. This study explores the impact of insulin on neuronal activity using a picture encoding task in a functional magnetic resonance imaging approach. Ten subjects performed two independent scanning sessions, each session divided into one part of four baseline runs and a second part of four runs during either insulin or saline was infused. A hyperinsulinemic- euglycemic clamp technique was applied to keep the blood glucose concentrations normal during insulin infusion. Contrast images between the two parts revealed identical activation patterns during baseline and saline conditions while during the insulin condition a higher level of activation was detected within the fusiform gyrus in both hemispheres. Shorter reaction times during the insulin condition underlined the cognitive benefit. For the first time, we were able to demonstrate that insulin enhances neuronal activity within the medio-temporal lobe and increased performance in humans under in-vivo conditions.
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Affiliation(s)
- Michael Rotte
- Department of Neurology II, Magdeburg University Medical School, Otto von Guericke University, Magdeburg, Germany.
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Abstract
INTRODUCTION Use of the harmonic scalpel is well established in surgery. The simple use and ability to save blood and time make this equipment usable in thyroid surgery, too. METHODS In a prospective, nonrandomized study including 32 patients, operating time, weight of resected thyroid tissue, and complications were analysed. A classic surgery group (ligature and HF electrosurgery) was compared with an ultracision group. RESULTS Mean+/-SD operative time was shorter in the harmonic scalpel group than in the conventional technique group (143.12+/-25.24 min vs 64.68+/-23.83 min, P<0.01). There was no difference between the two techniques regarding complications and patient characteristics. CONCLUSIONS Use of the harmonic scalpel in thyroid surgery is a safe procedure. The possibility it presents of saving operative time without increasing complications has now been published in several studies.
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Affiliation(s)
- R Mantke
- Klinik für Allgemein-,Viszeral und Gefässchirugie, Medizinische Fakultät der Otto-von-Guericke-Universität, Magdeburg.
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McCormick K, Grigull P, Burhenn R, Brakel R, Ehmler H, Feng Y, Gadelmeier F, Giannone L, Hildebrandt D, Hirsch M, Jaenicke R, Kisslinger J, Klinger T, Klose S, Knauer JP, König R, Kühner G, Laqua HP, Naujoks D, Niedermeyer H, Pasch E, Ramasubramanian N, Rust N, Sardei F, Wagner F, Weller A, Wenzel U, Werner A. New advanced operational regime on the W7-AS stellarator. Phys Rev Lett 2002; 89:015001. [PMID: 12097046 DOI: 10.1103/physrevlett.89.015001] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2002] [Indexed: 05/23/2023]
Abstract
A promising new plasma operational regime on the Wendelstein stellarator W7-AS has been discovered. It is extant above a threshold density and characterized by flat density profiles, high energy and low impurity confinement times, and edge-localized radiation. Impurity accumulation is avoided. Quasistationary discharges with line-averaged densities n(e) to 4 x 10(20) m(-3), radiation levels to 90%, and partial plasma detachment at the divertor target plates can be simultaneously realized. Energy confinement is up to twice that of a standard scaling. At B(t) = 0.9 T, an average beta value of 3.1% is achieved. The high n(e) values allow demonstration of electron Bernstein wave heating using linear mode conversion.
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Affiliation(s)
- K McCormick
- Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-85748 Garching, Germany.
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Pross M, Manger T, Heres F, Klose S, Lehnert H, Ridwelski K, Wolff S, Mantke R, Marusch F, Lippert H. [Laparoscopic adrenalectomy--experiences with transperitoneal approach]. Zentralbl Chir 2002; 127:610-3. [PMID: 12122591 DOI: 10.1055/s-2002-32849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
INTRODUCTION We report our results of laparoscopic anterior transperitoneal adrenalectomy. PATIENTS Between 4/1996 to 05/2001, a laparoscopic adrenalectomy was performed in 34 patients (median age 48 years). The adrenalectomy was performed transperitoneally (31 unilateral; 3 bilateral). The adrenaline level was measured in 7 patients with a pheochromocytoma. RESULTS All tumors (mean size 3.5 cm; 0.4 to 8.0 cm) could be extirpated by laparoscopy. 9 pheochromocytomas; 9 cortisol producing tumors (one patient with a Carney's syndrome); 7 Conn's adenomas and 9 incidentalomas constituted these tumors. In the first third of the observation period, the surgery lasted 176 (95-270) minutes, in the last third 82 (50-130) minutes (p < 0,01). We postoperatively observed the following complications: one abdominal wall hematoma at a port-site and one edematous pancreatitis after alteration of the pancreatic tail. The adrenaline level continually rose from the beginning of surgery to the ligature of the suprarenal vein. CONCLUSION Transperitoneal adrenalectomy in benign tumors (< 8 cm) is our method of choice. The resulting learning curve allowed the performance of adrenalectomy within an acceptable operative time and without significant blood loss. The transperitoneal technique is safe and well reproducible. The cosmetical results are convincing. We recommend an early ligature of the suprarenal vein in a pheochromocytoma.
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Affiliation(s)
- M Pross
- Klinik für Chirurgie, Otto-von-Guericke-Universität Madgeburg, Madgeburg
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Massaro C, Baker MA, Cosentino F, Ramires PA, Klose S, Milella E. Surface and biological evaluation of hydroxyapatite-based coatings on titanium deposited by different techniques. J Biomed Mater Res 2002; 58:651-7. [PMID: 11745517 DOI: 10.1002/jbm.1065] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Hydroxyapatite coatings have been deposited on titanium cp by plasma spray, sol-gel, and sputtering techniques for dental implant applications. The latter two techniques are of current interest, as they allow coatings of micrometer dimensions to be deposited. Coating morphology, composition, and structure have been investigated by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). All coatings were homogeneous and exhibited a rough morphology suitable for implant applications. The sputtered (after annealing), plasma spray, and sol-gel coatings all showed diffraction peaks corresponding to hydroxyapatite. The surface contaminants were observed to be different for the different coating types. The sputtered coatings were found to have a composition most similar to hydroxyapatite; the sol-gel deposits also showed a high concentration of hydroxyl ions. A discrepancy in the Ca/P ratio was observed for the plasma spray coatings, and a small concentration of carbonate ions was found in the sputter-deposited coatings. The in vitro cell-culture studies using MG63 osteoblast-like cells demonstrated the ability of cells to proliferate on the materials tested. The sol-gel coating promotes higher cell growth, greater alkaline phosphatase activity, and greater osteocalcin production compared to the sputtered and plasma-sprayed coatings.
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Affiliation(s)
- C Massaro
- PASTIS-CNRSM, Biomaterial Unit, SS7 Appia km 7+300, Brindisi, Italy
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Reschke K, Klose S, Mohnike K, Buhtz P, Roessner A, Lehnert H. [Manifestation of Cushing syndrome and osteoporotic fractures in pregnancy in a patient with Carney complex]. Med Klin (Munich) 2002; 97:91-5. [PMID: 11910875 DOI: 10.1007/s00063-002-1131-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
HISTORY AND CLINICAL FINDINGS In a 31-year-old patient a conventional X-ray was performed due to persistent pain at the lumbar spine level after a cesarean section. It revealed compression fractures of L2 and L3. Besides very clear clinical signs of hypercortisolism, multiple hyperpigmentations and naevi in the patient's face including the lips and the conjunctiva of the right eye were visible, suggesting a Carney complex. INVESTIGATIONS Insuppressible cortisol levels confirmed an adrenal origin of hypercortisolism. A selective catheterization of adrenal veins supported the presence of bilateral adrenal cortisol production. The computed tomography showed nodular lesions in the right and a hyperplasia of the left adrenal gland. TREATMENT AND COURSE A bilateral adrenalectomy was performed and a primary pigmented nodular adrenal hyperplasia was confirmed histologically. Clinical signs of hypercortisolism rapidly resolved after adrenalectomy. CONCLUSIONS The diagnosis of Cushing's syndrome as a part of Carney complex was diagnosed at the end of a pregnancy although signs of hypercortisolism were present a long time before. The rare diagnosis of Carney complex should be considered in patients exhibiting symptoms of hypercortisolim and the typical clinical signs (hyperpigmentations).
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Affiliation(s)
- Kirsten Reschke
- Klinik für Endokrinologie und Stoffwechselkrankheiten, Universitätsklinikum Magdeburg
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Haupt HJ, Flörke U, Klose S. A pseudo-trigonal bipyramidally coordinated Pt atom in dicarbonylbis(octacarbonyl-mu-dicyclohexylphosphidodirhenio)platinum(II). Acta Crystallogr C 2001; 57:810-1. [PMID: 11443248 DOI: 10.1107/s0108270101007399] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2001] [Accepted: 05/03/2001] [Indexed: 11/10/2022] Open
Abstract
In the title compound, [PtRe4(C12H22P)2(CO)18] or [(mu-PCy2)(CO)8Re2]2Pt(CO)2 (Cy is cyclohexyl), two phosphido-bridged dirhenium groups are linked by a Pt(CO)2 unit and show different bonding patterns for stereochemical reasons. The Re--Re distances are 3.2620 (15) and 3.0739 (15) A, and the Pt--Re distances are 2.9165 (12), 2.9025 (15) and 2.8548 (13) A.
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Affiliation(s)
- H J Haupt
- Fachbereich Chemie und Chemietechnik, Universität Paderborn, Warburgerstrasse 100, D-33098 Paderborn, Germany
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Affiliation(s)
- H Lehnert
- Klinik für Endokrinologie und Stoffwechselkrankheiten, Universitätsklinikum Magdeburg, Leipziger Strasse 44, 39120 Magdeburg.
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Abstract
A retroperitoneal tumor in the region of the adrenal gland was diagnosed in a 56-year-old woman. The patient had been suffering from a dull abdominal pain for nearly four weeks before consulting her family physician. Ultrasound, CT and MRI scans revealed a giant tumor of the right adrenal gland. Endocrine activity could not be demonstrated. The size of the tumor was suggestive of an adrenal carcinoma. The patient was referred for adrenalectomy and complete exstirpation of the retroperitoneal mass. The histological examination revealed characteristical findings of a benign schwannoma.
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Affiliation(s)
- D Pittasch
- Department of Endocrinology and Metabolism, Otto-von-Guericke-University, Magdeburg, Germany
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48
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Reschke K, Klose S, Ridwelski K, Lehnert H. Obesity: sometimes more than adipose tissue. Lancet 2000; 356:734. [PMID: 11085694 DOI: 10.1016/s0140-6736(00)02633-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- K Reschke
- Department of Endocrinology and Metabolism, Magdeburg University Medical School, Germany
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Vrba FJ, Henden AA, Luginbuhl CB, Guetter HH, Hartmann DH, Klose S. The Discovery of an Embedded Cluster of High-Mass Stars near SGR 1900+14. Astrophys J 2000; 533:L17-L20. [PMID: 10727381 DOI: 10.1086/312602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/1999] [Accepted: 02/23/2000] [Indexed: 05/23/2023]
Abstract
Deep I-band imaging to I approximately 26.5 of the soft gamma-ray repeater SGR 1900+14 region has revealed a compact cluster of massive stars located only a few arcseconds from the fading radio source thought to be the location of the soft gamma-ray repeater (SGR). This cluster was previously hidden in the glare of the pair of M5 supergiant stars (whose light was removed by point-spread function subtraction) proposed by Vrba et al. as likely associated with SGR 1900+14. The cluster has at least 13 members within a cluster radius of approximately 0.6 pc based on an estimated distance of 12-15 kpc. It is remarkably similar to a cluster found associated with SGR 1806-20. That similar clusters have now been found at or near the positions of the two best studied SGRs suggests that young neutron stars, which are thought to be responsible for the SGR phenomenon, have their origins in proximate compact clusters of massive stars.
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Meyer H, Klose S, Pasch E, Fussmann G. Plasma rotation in a plasma generator. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 2000; 61:4347-4356. [PMID: 11088232 DOI: 10.1103/physreve.61.4347] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/1999] [Indexed: 05/23/2023]
Abstract
The plasma rotation in a linear magnetic configuration has been investigated by means of high-resolution Doppler-spectroscopy. The effects of external device parameters and ion mass as well as the radial profiles have been studied. A simple model, based on the conservation of the total angular momentum, explains the main empirically determined dependences of the average angular velocity. The results are compared with the common multifluid description developed for hollow cathode discharges.
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Affiliation(s)
- H Meyer
- Bereich Plasmadiagnostik, Max-Planck-Institut fur Plasmaphysik, Mohrenstrasse 41, D-10117 Berlin, Germany
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