1
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Koller AJ, Glaser O, DeLuca MC, Motz RN, Amason EK, Carbo-Bague I, Mixdorf JC, Guzei IA, Aluicio-Sarduy E, Śmiłowicz D, Barnhart TE, Ramogida CF, Nolan EM, Engle JW, Boros E. "Off-Label Use" of the Siderophore Enterobactin Enables Targeted Imaging of Cancer with Radioactive Ti (IV). Angew Chem Int Ed Engl 2024; 63:e202319578. [PMID: 38442302 DOI: 10.1002/anie.202319578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/27/2024] [Accepted: 03/04/2024] [Indexed: 03/07/2024]
Abstract
The development of inert, biocompatible chelation methods is required to harness the emerging positron emitting radionuclide 45Ti for radiopharmaceutical applications. Herein, we evaluate the Ti(IV)-coordination chemistry of four catechol-based, hexacoordinate chelators using synthetic, structural, computational, and radiochemical approaches. The siderophore enterobactin (Ent) and its synthetic mimic TREN-CAM readily form mononuclear Ti(IV) species in aqueous solution at neutral pH. Radiolabeling studies reveal that Ent and TREN-CAM form mononuclear complexes with the short-lived, positron-emitting radionuclide 45Ti(IV), and do not transchelate to plasma proteins in vitro and exhibit rapid renal clearance in naïve mice. These features guide efforts to target the 45Ti isotope to prostate cancer tissue through the design, synthesis, and evaluation of Ent-DUPA, a small molecule conjugate composed of a prostate specific membrane antigen (PSMA) targeting peptide and a monofunctionalized Ent scaffold. The [45Ti][Ti(Ent-DUPA)]2- complex forms readily at room temperature. In a tumor xenograft model in mice, selective tumor tissue accumulation (8±5 %, n=5), and low off-target uptake in other organs is observed. Overall, this work demonstrates targeted imaging with 45Ti(IV), provides a foundation for advancing the application of 45Ti in nuclear medicine, and reveals that Ent can be repurposed as a 45Ti-complexing cargo for targeted nuclear imaging applications.
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Affiliation(s)
- Angus J Koller
- Department of Chemistry, Stony Brook University, Stony Brook, New York, 11794, United States
| | - Owen Glaser
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin, 53706, United States
| | - Molly C DeLuca
- Department of Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, Wisconsin, 53705, United States
| | - Rachel N Motz
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, United States
| | - Edith K Amason
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin, 53706, United States
| | - Imma Carbo-Bague
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
| | - Jason C Mixdorf
- Department of Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, Wisconsin, 53705, United States
| | - Ilia A Guzei
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin, 53706, United States
| | - Eduardo Aluicio-Sarduy
- Department of Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, Wisconsin, 53705, United States
| | - Dariusz Śmiłowicz
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin, 53706, United States
| | - Todd E Barnhart
- Department of Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, Wisconsin, 53705, United States
| | - Caterina F Ramogida
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
| | - Elizabeth M Nolan
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, United States
| | - Jonathan W Engle
- Department of Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, Madison, Wisconsin, 53705, United States
| | - Eszter Boros
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin, 53706, United States
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2
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Mavi ME, Bozkurt MF. 18F-FDG PET/CT Imaging for Treatment Response Assessment of Cardiac Primitive Neuroectodermal Tumor. Mol Imaging Radionucl Ther 2024; 33:50-53. [PMID: 38390790 PMCID: PMC10899740 DOI: 10.4274/mirt.galenos.2023.91259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024] Open
Abstract
Primitive neuroectodermal tumors (PNETs) are rare and aggressive members of the small round cell carcinoma family. Generally, PNETs are classified into two main groups: PNETs of the central nervous system and PNETs of the peripheral nervous system. Herein, we report the therapy response assessment of a rare case of isolated cardiac PNET using 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) imaging. Given that physiological cardiac FDG uptake is typically observed, assessing FDG avid lesions in the myocardium presents a challenge for FDG PET/CT. This case holds significance because of the rarity of the disease and the challenging nature of the site for FDG PET/CT imaging.
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Affiliation(s)
- Mehmet Emin Mavi
- Hacettepe University Faculty of Medicine, Department of Nuclear Medicine, Ankara, Türkiye
| | - Murat Fani Bozkurt
- Hacettepe University Faculty of Medicine, Department of Nuclear Medicine, Ankara, Türkiye
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3
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Yu T, Ning S, Liu Q, Zhang T, Chen X, Qi N, Su X, Tang X, Chen Z. Balanced High Thermoelectric Performance in n-Type and p-Type CuAgSe Realized through Vacancy Manipulation. ACS Appl Mater Interfaces 2023; 15:40781-40791. [PMID: 37589126 DOI: 10.1021/acsami.3c08897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
As a liquid-like material, CuAgSe has high carrier mobility and ultralow lattice thermal conductivity. It undergoes an n-p conduction-type transition during β- to α-phase transition with increasing temperature. Moreover, optimization of the thermoelectric performance of CuAgSe is rather difficult, owing to the two-carrier conduction in this material. In this work, we reported the free tuning of the conduction type and thermoelectric performance of CuAgSe by manipulating the cation vacancies. Positron annihilation measurements reveal that the increase in CuAg content can effectively suppress the cation vacancies and reduce the hole carrier concentration, resulting in n-type conduction at high temperatures. Doping with Zn at the Cu sublattice in the CuAg-excessive CuAgSe can further decrease the number of vacancies, leading to a significant decrease in hole carrier concentration. Furthermore, the reduction of vacancies leads to weakening of carrier scattering. As a result, carrier mobility is also enhanced, thus improving the thermoelectric performance of n-type CuAgSe. On the other hand, high-performance p-type CuAgSe can be achieved by decreasing the CuAg content to introduce more cation vacancies. Ultimately, both n-type and p-type CuAgSe with superb thermoelectric performance are obtained, with a zTmax of 0.84 in Cu1.01Ag1.02Zn0.01Se (n-type) and 1.05 in (CuAg)0.96Se (p-type) at 600 K and average zT of 0.77 and 0.94 between 470 and 630 K for n-type and p-type, respectively.
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Affiliation(s)
- Tian Yu
- Hubei Nuclear Solid Physics Key Laboratory, Department of Physics, Wuhan University, Wuhan 430072, China
| | - Suiting Ning
- Hubei Nuclear Solid Physics Key Laboratory, Department of Physics, Wuhan University, Wuhan 430072, China
| | - Qian Liu
- Hubei Nuclear Solid Physics Key Laboratory, Department of Physics, Wuhan University, Wuhan 430072, China
| | - Tingting Zhang
- Hubei Nuclear Solid Physics Key Laboratory, Department of Physics, Wuhan University, Wuhan 430072, China
| | - Xiangbin Chen
- Hubei Nuclear Solid Physics Key Laboratory, Department of Physics, Wuhan University, Wuhan 430072, China
| | - Ning Qi
- Hubei Nuclear Solid Physics Key Laboratory, Department of Physics, Wuhan University, Wuhan 430072, China
| | - Xianli Su
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Xinfeng Tang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Zhiquan Chen
- Hubei Nuclear Solid Physics Key Laboratory, Department of Physics, Wuhan University, Wuhan 430072, China
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4
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Eakins J, Hager L, O'Connor U, Cooke J, O'Reilly G, Walsh C, Willson T. Personal dosimetry for positron emitters, and occupational exposures from clinical use of gallium-68. J Radiol Prot 2022; 42:031511. [PMID: 35947972 DOI: 10.1088/1361-6498/ac8885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
The current status and issues regarding positron dosimetry in nuclear medicine are summarized. The suitability of the United Kingdom Health Security Agency extremity and eye beta-gamma personal thermoluminescence dosemeters are then considered. Monte Carlo modelling is performed to determine their responses and derive sets of calibration factors, along withHp(0.07) andHp(3) conversion coefficients, for carbon-11, nitrogen-13, oxygen-15, fluorine-18 and gallium-68 sources, which are commonly used in positron emission tomography (PET) computed tomography; data for these isotopes is assumed extrapolatable to other positron sources. It is found that the dosemeters are adequate for assessing exposures to PET radionuclides, even if their routine calibrations to caesium-137 were maintained. An idealized set of measurements representing gallium-68 exposure scenarios is then described, including reproducible mock-ups of individuals manipulating vials and syringes. Finally, a short case-study is presented that explores occupational doses during routine clinical use of gallium-68. The extremity dosemeter results demonstrated significant variations dependent upon the exposure conditions, with some seen to be comparatively large; whole-body and eye dose rates per activity were found to be lower. The importance of routine dose monitoring of workers is emphasized, with the need for a longer-termed follow-up study demonstrated.
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Affiliation(s)
- J Eakins
- United Kingdom Health Security Agency (UKHSA) RCE, Didcot, Oxfordshire, United Kingdom
| | - L Hager
- United Kingdom Health Security Agency (UKHSA) RCE, Didcot, Oxfordshire, United Kingdom
| | - U O'Connor
- Medical Physics & Bioengineering Department, St James's Hospital, Dublin, Ireland
| | - J Cooke
- Medical Physics & Bioengineering Department, St James's Hospital, Dublin, Ireland
| | - G O'Reilly
- Medical Physics & Bioengineering Department, St James's Hospital, Dublin, Ireland
| | - C Walsh
- Medical Physics & Bioengineering Department, St James's Hospital, Dublin, Ireland
| | - T Willson
- Nuclear Medicine Department, Royal Free London NHS Foundation Trust, London, United Kingdom
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5
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Shahmohammadi Beni M, Yu KN, Islam MR, Watabe H. Development of PHITS graphical user interface for simulation of positron emitting radioisotopes production in common biological materials during proton therapy. J Radiat Res 2022; 63:385-392. [PMID: 35349714 PMCID: PMC9124619 DOI: 10.1093/jrr/rrac010] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/24/2022] [Indexed: 06/14/2023]
Abstract
The Monte Carlo (MC) method is a powerful tool for modeling nuclear radiation interaction with matter. A variety of MC software packages has been developed, especially for applications in radiation therapy. Most widely used MC packages require users to write their own input scripts for their systems, which can be a time consuming and error prone process and requires extensive user experience. In the present work, we have developed a graphical user interface (GUI) bundled with a custom-made 3D OpenGL visualizer for PHITS MC package. The current version focuses on modeling proton induced positron emitting radioisotopes, which in turn can be used for verification of proton ranges in proton therapy. The developed GUI program does not require extensive user experience. The present open-source program is distributed under GPLv3 license that allows users to freely download, modify, recompile and redistribute the program.
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Affiliation(s)
| | | | - M Rafiqul Islam
- Graduate School of Biomedical Engineering, Tohoku University, Sendai 980-8579, Japan
| | - Hiroshi Watabe
- Corresponding author. Division of Radiation Protection and Safety Control, Cyclotron and Radioisotope Center, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan. Phone: (81)22-795-7803; Fax: (81)22-795-7809;
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6
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Jacene HA, Liu M, Cheng SC, Abbott A, Dubey S, McCall K, Young D, Johnston M, Van den Abbeele AD, Overmoyer B. Imaging Androgen Receptors in Breast Cancer with 18F-fluoro-5α-dihydrotestosterone-PET: A Pilot Study. J Nucl Med 2021; 63:22-28. [PMID: 34049982 DOI: 10.2967/jnumed.121.262068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/20/2021] [Indexed: 11/16/2022] Open
Abstract
Most breast cancers express androgen receptors (AR). This prospective imaging sub-study explored imaging AR with 18F-fluoro-5α-dihydrotestosterone (FDHT)-PET in patients with metastatic breast cancer (MBC) receiving selective AR modulation (SARM) therapy (GTx-024, GTx, Inc). Methods: 11 post-menopausal women with estrogen receptor positive MBC underwent FDHT-PET/CT at baseline, 6, and 12 weeks after starting SARM therapy. Abnormal tumor FDHT uptake was quantified using maximum SUV (SUVmax). AR status was determined from tumor biopsy specimens. FDHT-SUVmax percent change between scans was calculated. Best overall response was categorized as clinical benefit (CB: non-progressive disease [PD]), or PD using RECIST 1.1. Results: Median baseline FDHT-SUVmax was 4.1 (range 1.4-5.9) for AR+ tumors versus 2.3 (range 1.5-3.2) for AR- tumors (p=0.22). Quantitative AR expression and baseline FDHT uptake were weakly correlated (Pearson rho=0.39, p=0.30). Seven participants with CB at 12 weeks tended to have larger declines in FDHT uptake compared to those with PD at both 6 (median decline, range: -26.8%, -42.9 to -14.1% vs. -3.7%, -31% to +29%, respectively, p=0.11) and 12 weeks (median decline, range: -35.7%, -69.5 to -7.7% vs. -20.1%, -26.6% to +56.5%, respectively, p=0.17) after starting GTx-024. Conclusion: This hypothesis-generating data suggests that FDHT-PET/CT is worth further study as an imaging biomarker for evaluating response of MBC to SARM therapy and reiterates the feasibility of including molecular imaging in multidisciplinary therapeutic trials.
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Affiliation(s)
| | - Mofei Liu
- Dana-Farber Cancer Institute, United States
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7
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Carrasquillo JA, Fine BM, Pandit-Taskar N, Larson SM, Fleming SE, Fox JJ, Cheal SM, O'Donoghue JA, Ruan S, Ragupathi G, Lyashchenko SK, Humm JL, Scher HI, Gönen M, Williams SP, Danila DC, Morris MJ. Imaging Patients with Metastatic Castration-Resistant Prostate Cancer Using 89Zr-DFO-MSTP2109A Anti-STEAP1 Antibody. J Nucl Med 2019; 60:1517-1523. [PMID: 31053681 PMCID: PMC6836860 DOI: 10.2967/jnumed.118.222844] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 03/04/2019] [Indexed: 12/17/2022] Open
Abstract
Six-transmembrane epithelial antigen of prostate-1 (STEAP1) is a relatively newly identified target in prostate cancer. We evaluated the ability of PET/CT with 89Zr-DFO-MSTP2109A, an antibody that recognizes STEAP1, to detect lesions in patients with metastatic castration-resistant prostate cancer (mCRPC). Methods: Nineteen mCRPC patients were prospectively imaged using approximately 185 MBq/10 mg of 89Zr-DFO-MSTP2109A. 89Zr-DFO-MSTP2109A PET/CT images obtained 4-7 d after injection were compared with bone and CT scans. Uptake in lesions was measured. Fifteen patients were treated with an antibody-drug conjugate (ADC) based on MSTP2109A; ADC treatment-related data were correlated with tumor uptake by PET imaging. Bone or soft-tissue biopsy samples were evaluated. Results: No significant toxicity occurred. Excellent uptake was observed in bone and soft-tissue disease. Median SUVmax was 20.6 in bone and 16.8 in soft tissue. Sixteen of 17 lesions biopsied were positive on 89Zr-DFO-MSTP2109A, and all sites were histologically positive (1 on repeat biopsy). Bayesian analysis resulted in a best estimate of 86% of histologically positive lesions being true-positive on imaging (95% confidence interval, 75%-100%). There was no correlation between SUVmax tumor uptake and STEAP1 immunohistochemistry, survival after ADC treatment, number of ADC treatment cycles, or change in prostate-specific antigen level. Conclusion:89Zr-DFO-MSTP2109A is well tolerated and shows localization in mCRPC sites in bone and soft tissue. Given the high SUV in tumor and localization of a large number of lesions, this reagent warrants further exploration as a companion diagnostic in patients undergoing STEAP1-directed therapy.
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Affiliation(s)
- Jorge A Carrasquillo
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | | | - Neeta Pandit-Taskar
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
- Department of Radiology, Weill Cornell Medical Center, New York, New York
- Center for Targeted Radioimmunotherapy and Diagnosis, Ludwig Center for Cancer Immunotherapy, New York, New York
| | - Steven M Larson
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
- Department of Radiology, Weill Cornell Medical Center, New York, New York
- Center for Targeted Radioimmunotherapy and Diagnosis, Ludwig Center for Cancer Immunotherapy, New York, New York
| | - Stephen E Fleming
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Josef J Fox
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Sarah M Cheal
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Joseph A O'Donoghue
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Shutian Ruan
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Govind Ragupathi
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Serge K Lyashchenko
- Radiochemistry and Molecular Imaging Probes Core, Memorial Sloan Kettering Cancer Center, New York, New York
| | - John L Humm
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Howard I Scher
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
- Joan and Sanford I. Weill Department of Medicine, Weill Cornell Medicine, New York, New York; and
| | - Mithat Gönen
- Biostatistics Service, Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York
| | | | - Daniel C Danila
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
- Joan and Sanford I. Weill Department of Medicine, Weill Cornell Medicine, New York, New York; and
| | - Michael J Morris
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
- Joan and Sanford I. Weill Department of Medicine, Weill Cornell Medicine, New York, New York; and
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Chaker S, Al-Dasuqi K, Baradaran H, Demetres M, Delgado D, Nehmeh S, Osborne JR, Christos PJ, Kamel H, Gupta A. Carotid Plaque Positron Emission Tomography Imaging and Cerebral Ischemic Disease. Stroke 2019; 50:2072-2079. [PMID: 31272325 DOI: 10.1161/strokeaha.118.023987] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Background and Purpose- The clinical utility of positron emission tomography (PET) imaging in evaluating carotid artery plaque vulnerability remains unclear. Two tracers of recent interest for carotid plaque imaging are 18F-fluorodeoxyglucose (18F-FDG) and 18F-sodium fluoride (18F-NaF). We performed a systematic review and meta-analysis evaluating the association between carotid artery 18F-FDG or 18F-NaF uptake and recent or future cerebral ischemic events. Methods- A systematic review of Ovid MEDLINE, Ovid EMBASE, and the Cochrane library was conducted from inception to December 2017 for articles evaluating PET tracer uptake in recently symptomatic versus asymptomatic carotid arteries, and articles evaluating carotid uptake in relation to future ischemic events. Cerebral ischemic events were defined as ipsilateral strokes, transient ischemic attacks, or amaurosis fugax. We quantitatively pooled studies by a random-effects model when 3 or more studies were amenable for analysis. We assessed the standardized mean difference between tracer uptake in the symptomatic versus asymptomatic carotid artery using Cohen's d metric. Results- After screening 4144 unique articles, 13 prospective cohort studies assessing carotid artery 18F-FDG uptake in patients with recent cerebral ischemia were eligible for review. Eleven cohorts of 290 subjects scanned with 18F-FDG were eligible for meta-analysis. We found that carotid arteries ipsilateral to recent ischemic events had significantly higher 18F-FDG uptake than asymptomatic arteries (Cohen's d =0.492; CI=0.130-0.855; P=0.008) as well as significant heterogeneity (Cochran's Q =31.5; P=0.0005; I2=68.3%). Meta-regression was not performed due to the limited number of studies in the analysis. Only 2 studies investigating 18F-NaF PET imaging, and another 2 articles investigating ischemic event recurrence were found. Conclusions- Recent ipsilateral cerebral ischemia may be associated with increased carotid 18F-FDG uptake on PET imaging regardless of degree of carotid stenosis, although significant heterogeneity was found, and these results should be interpreted with caution. Emerging evidence suggests a similar association may be present with 18F-NaF plaque uptake. More studies are warranted to provide definitive conclusions on the utility of 18F-FDG or 18F-NaF in carotid plaque evaluation before investigating carotid PET as a diagnostic tool for cerebral ischemic events.
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Affiliation(s)
- Salama Chaker
- From the Department of Radiology (S.C., S.N., J.R.O., A.G.), Weill Cornell Medicine
| | - Khalid Al-Dasuqi
- Department of Radiology, Yale University School of Medicine (K.A.-D.)
| | | | - Michelle Demetres
- Samuel J. Wood Library and C.V. Starr Biomedical Information Center (M.D., D.D.), Weill Cornell Medicine
| | - Diana Delgado
- Samuel J. Wood Library and C.V. Starr Biomedical Information Center (M.D., D.D.), Weill Cornell Medicine
| | - Sadek Nehmeh
- From the Department of Radiology (S.C., S.N., J.R.O., A.G.), Weill Cornell Medicine
| | - Joseph R Osborne
- From the Department of Radiology (S.C., S.N., J.R.O., A.G.), Weill Cornell Medicine
| | - Paul J Christos
- Department of Healthcare Policy and Research (P.J.C.), Weill Cornell Medicine
| | - Hooman Kamel
- Clinical and Translational Neuroscience Unit, Feil Family Brain and Mind Research Institute and Department of Neurology (H.K., A.G.), Weill Cornell Medicine
| | - Ajay Gupta
- From the Department of Radiology (S.C., S.N., J.R.O., A.G.), Weill Cornell Medicine.,Clinical and Translational Neuroscience Unit, Feil Family Brain and Mind Research Institute and Department of Neurology (H.K., A.G.), Weill Cornell Medicine
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9
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O'Donoghue JA, Danila DC, Pandit-Taskar N, Beylergil V, Cheal SM, Fleming SE, Fox JJ, Ruan S, Zanzonico PB, Ragupathi G, Lyashchenko SK, Williams SP, Scher HI, Fine BM, Humm JL, Larson SM, Morris MJ, Carrasquillo JA. Pharmacokinetics and Biodistribution of a [ 89Zr]Zr-DFO-MSTP2109A Anti-STEAP1 Antibody in Metastatic Castration-Resistant Prostate Cancer Patients. Mol Pharm 2019; 16:3083-3090. [PMID: 31117485 DOI: 10.1021/acs.molpharmaceut.9b00326] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A six-transmembrane epithelial antigen of prostate-1 (STEAP1) is a newly identified target in prostate cancer. The use of radio-labeled STEAP1-targeting antibodies with positron emission tomography (PET) may allow for detection of sites of metastatic prostate cancer and may refine patient selection for antigen-directed therapies. This was a prospective study in seven patients with metastatic castration-resistant prostate cancer who had at least one archival biopsy that was STEAP1-positive by immunohistochemistry. Patients received intravenous injections of ∼185 MBq and 10 mg of [89Zr]Zr-DFO-MSTP2109A, a humanized IgG1 monoclonal antibody directed against STEAP1. PET/CT images, blood samples, and whole-body counts were monitored longitudinally in six patients. Here, we report on safety, biodistribution, pharmacokinetics, dose estimates to normal tissues, and initial tumor targeting for this group of patients. There was no significant acute or subacute toxicity. Favorable biodistribution and enhanced lesion uptake (in both bone and soft tissue) were observed on imaging using a mass of 10 mg of DFO-MSTP2109A. The best lesion discrimination was seen at the latest imaging time, a median of 6 days postadministration. Pharmacokinetics showed a median serum T1/2 β of 198 h, volume of central compartment of 3.54 L (similar to plasma volume), and clearance of 19.7 mL/h. The median biologic T1/2 for whole-body retention was 469 h. The highest mean absorbed doses to normal organs (mGy/MBq) were 1.18, 1.11, 0.78, 0.73, and 0.71 for liver, heart wall, lung, kidney, and spleen, respectively. Excellent targeting of metastatic prostate sites in both bone and soft tissue was observed, with an optimal imaging time of 6 days postadministration. The liver and heart were the normal organs that experienced the highest absorbed doses. The pharmacokinetics were similar to other antibodies without major cross-reactivity with normal tissues. A more detailed analysis of lesion targeting in a larger patient population with correlation to immunohistology and standard imaging modalities has been reported.
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Affiliation(s)
| | - Daniel C Danila
- Department of Medicine , Joan and Sanford I. Weill College of Medicine of Cornell University , New York , New York 10065 , United States
| | - Neeta Pandit-Taskar
- Department of Radiology , Joan and Sanford I. Weill Cornell Medical Center , New York , New York 10065 , United States
| | | | | | | | | | | | | | | | | | - Simon P Williams
- Genentech , South San Francisco , California 94080 , United States
| | - Howard I Scher
- Department of Medicine , Joan and Sanford I. Weill College of Medicine of Cornell University , New York , New York 10065 , United States
| | - Bernard M Fine
- Genentech , South San Francisco , California 94080 , United States
| | | | - Steven M Larson
- Department of Radiology , Joan and Sanford I. Weill Cornell Medical Center , New York , New York 10065 , United States.,Center for Targeted Radioimmunotherapy and Diagnosis of the Ludwig Center for Cancer Immunotherapy , New York , New York 10065 , United States
| | - Michael J Morris
- Department of Medicine , Joan and Sanford I. Weill College of Medicine of Cornell University , New York , New York 10065 , United States
| | - Jorge A Carrasquillo
- Department of Radiology , Joan and Sanford I. Weill Cornell Medical Center , New York , New York 10065 , United States.,Center for Targeted Radioimmunotherapy and Diagnosis of the Ludwig Center for Cancer Immunotherapy , New York , New York 10065 , United States
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10
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Abstract
Recently it has been proposed that the positron, the anti-particle analog of the electron, is capable of forming an anti-matter bond in a composite system consists of two hydride anions and a positron [Angew. Chem. Int. Ed. 57, 8859-8864 (2018)]. In order to dig into the nature of this novel bond the newly developed multi-component quantum theory of atoms in molecules (MC-QTAIM) is applied to this positronic system. The topological analysis reveals that this species is composed of two atoms in molecules, each containing a proton and half of the electronic and the positronic populations. Further analysis elucidates that the electron exchange phenomenon is virtually non-existent between the two atoms and no electronic covalent bond is conceivable in between. On the other hand, it is demonstrated that the positron density enclosed in each atom is capable of stabilizing interactions with the electron density of the neighboring atom. This electrostatic interaction suffices to make the whole system bonded against all dissociation channels. Thus, the positron indeed acts like an anti-matter glue between the two atoms.
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Affiliation(s)
- Mohammad Goli
- School of Nano Science, Institute for Research in Fundamental Sciences (IPM), Tehran, 19395-5531, Iran
| | - Shant Shahbazian
- Department of Physics, Shahid Beheshti University, G. C., Evin, Tehran, Iran, 19839, P.O. Box 19395-4716
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11
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Kochkin P, Sarria D, Skeie C, van Deursen APJ, de Boer AI, Bardet M, Allasia C, Flourens F, Østgaard N. In-Flight Observation of Positron Annihilation by ILDAS. J Geophys Res Atmos 2018; 123:8074-8090. [PMID: 31032163 PMCID: PMC6473548 DOI: 10.1029/2018jd028337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 06/13/2018] [Accepted: 06/14/2018] [Indexed: 06/09/2023]
Abstract
We report a 511-keV photon flux enhancement that was observed inside a thundercloud and is a result of positron annihilation. The observation was made with the In-flight Lightning Damage Assessment System (ILDAS) on board of an A340 test aircraft. The aircraft was intentionally flying through a thunderstorm at 12-km altitude over Northern Australia in January 2016. Two gamma ray detectors showed a significant count rate increase synchronously with fast electromagnetic field variations registered by an on-board antenna. A sequence of 10 gamma ray enhancements was detected, each lasted for about 1 s. Their spectrum mainly consists of 511-keV photons and their Compton component. The local electric activity during the emission was identified as a series of static discharges of the aircraft. A full-scale Geant4 model of the aircraft was created to estimate the emission area. Monte Carlo simulation indicated that the positrons annihilated in direct vicinity or in the aircraft body.
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Affiliation(s)
| | - D. Sarria
- BCSSUniversity of BergenBergenNorway
| | - C. Skeie
- BCSSUniversity of BergenBergenNorway
| | - A. P. J. van Deursen
- Electrical Engineering DepartmentEindhoven University of TechnologyEindhovenNetherlands
| | - A. I. de Boer
- The Netherlands Aerospace CentreAmsterdamNetherlands
| | - M. Bardet
- The Netherlands Aerospace CentreAmsterdamNetherlands
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12
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Wang Y, Li M, Diao R, Tung B, Zhang D, Li Y. Experimental study on the therapeutic effect and underlining mechanisms of positron in pancreatic cancer cells. Oncotarget 2017; 8:51652-51662. [PMID: 28881676 PMCID: PMC5584277 DOI: 10.18632/oncotarget.18366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 05/03/2017] [Indexed: 11/25/2022] Open
Abstract
The purpose of this study was to assess the potential therapeutic effect of positrons emitted by 18F-2-Deoxy-2-Fluoro-D-Glucose (18F-FDG) on pancreatic cancer cells and elucidate its underlying mechanisms. Pancreatic cancer cells were incubated with different radioactive concentrations of 18F-FDG and evaluated for anti-cancer properties and underlining mechanisms. In addition, three groups of tumor-bearing mice were treated with different doses of 18F-FDG weekly, the tumor growth rate was calculated, and the mice were imaged by positron emission tomography (PET) with 18F-FDG before and after treatment. The presence of apoptosis was detected by terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) stain and immunohistochemistry analysis. All treated groups exhibited positron-inhibited proliferation and positron-induced apoptosis compared with the control group in vitro. Further, we noted that higher treatment dose correlated with a better treatment response. In vivo, the high dose administration of 18F-FDG reduced tumor growth and prolonged the survival of treated mice compared with the control group with no change in the behavior or normal tissues of the mice. Immunohistochemical analysis and TUNEL stain showed more apoptotic cells than that in control group. The results demonstrated that positron radiation inhibited the proliferation and induced apoptosis of pancreatic cancer cells in vitro and in vivo, via an endogenous mitochondria-mediated signaling pathway.
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Affiliation(s)
- Ying Wang
- Department of Nuclear Medicine, First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China.,Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Ming Li
- Department of Urology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Rao Diao
- Department of Nuclear Medicine, First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Brian Tung
- Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Dalong Zhang
- Department of Nuclear Medicine, First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yaming Li
- Department of Nuclear Medicine, First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
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13
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Abstract
Rationale: Synaptic dopamine (DA) release induced by amphetamine or other experimental manipulations can displace [
11C]raclopride (RAC*) from dopamine D2-like receptors. We hypothesized that exogenous levodopa might increase dopamine release at striatal synapses under some conditions but not others, allowing a more naturalistic assessment of presynaptic dopaminergic function. Presynaptic dopaminergic abnormalities have been reported in Tourette syndrome (TS). Objective: Test whether levodopa induces measurable synaptic DA release in healthy people at rest, and gather pilot data in TS. Methods: This double-blind crossover study used RAC* and positron emission tomography (PET) to measure synaptic dopamine release 4 times in each of 10 carbidopa-pretreated, neuroleptic-naïve adults: before and during an infusion of levodopa on one day and placebo on another (in random order). Five subjects had TS and 5 were matched controls. RAC* binding potential (BP
ND) was quantified in predefined anatomical volumes of interest (VOIs). A separate analysis compared BP
ND voxel by voxel over the entire brain. Results: DA release declined between the first and second scan of each day (p=0.012), including on the placebo day. Levodopa did not significantly reduce striatal RAC* binding and striatal binding did not differ significantly between TS and control groups. However, levodopa’s effect on DA release differed significantly in a right midbrain region (p=0.002, corrected), where levodopa displaced RAC* by 59% in control subjects but
increased BP
ND by 74% in TS subjects. Discussion: Decreased DA release on the second scan of the day is consistent with the few previous studies with a similar design, and may indicate habituation to study procedures. We hypothesize that mesostriatal DA neurons fire relatively little while subjects rest, possibly explaining the non-significant effect of levodopa on striatal RAC* binding. The modest sample size argues for caution in interpreting the group difference in midbrain DA release with levodopa.
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Affiliation(s)
- Kevin J Black
- Departments of Psychiatry, Neurology, Radiology, and Anatomy & Neurobiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Marilyn L Piccirillo
- School of Arts and Sciences, Washington University, St. Louis, MO, 63130, USA ; Temple University, Philadelphia, PA, USA
| | - Jonathan M Koller
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Tiffany Hseih
- School of Arts and Sciences, Washington University, St. Louis, MO, 63130, USA ; Department of Ophthalmology, University of Cincinnati, Cincinnati, OH, USA
| | - Lei Wang
- Departments of Psychiatry & Behavioral Sciences, and Radiology, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Mark A Mintun
- Departments of Radiology, Psychiatry, Bioengineering, and Anatomy & Neurobiology, Washington University, St. Louis, MO, 63130, USA ; Avid Radiopharmaceuticals, Philadelphia, PA, USA
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14
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Abstract
The creation of cold antihydrogen atoms by the controlled combination of positrons and antiprotons has opened up a new window on fundamental physics. More recently, techniques have been developed that allow some antihydrogen atoms to be created at low enough kinetic energies that they can be held inside magnetic minimum neutral atom traps. With confinement times of many minutes possible, it has become feasible to perform experiments to probe the properties of the antiatom for the first time. We review the experimental progress in this area, outline some of the motivation for studying basic aspects of antimatter physics and provide an outlook of where we might expect this field to go in the coming years.
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15
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Abstract
The development of noninvasive imaging techniques using monoclonal antibodies (mAbs) is a quickly evolving field. Immuno-PET uses positron-emitting isotopes to track the localization of mAbs with excellent image quality. Procedures for labeling mAbs with (89)Zr or (124)I using good manufacturing procedures have been established, and therefore these radiopharmaceuticals are being investigated for clinical use. This short review will focus on immuno-PET with full mAbs using long-lived positron-emitting isotopes ((89)Zr and (124)I) over the past 5 y and discuss their progress into clinical use.
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Affiliation(s)
- Brian D Wright
- Department of Radiology, Washington University School of Medicine, St Louis, Missouri 63110, USA
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16
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Dvoyan KG, Matinyan SG, Vlahovic B. Theory of confined states of positronium in spherical and circular quantum dots with Kane's dispersion law. Nanoscale Res Lett 2013; 8:311. [PMID: 23826867 PMCID: PMC3716990 DOI: 10.1186/1556-276x-8-311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Accepted: 06/16/2013] [Indexed: 06/02/2023]
Abstract
Confined states of a positronium (Ps) in the spherical and circular quantum dots (QDs) are theoretically investigated in two size quantization regimes: strong and weak. Two-band approximation of Kane's dispersion law and parabolic dispersion law of charge carriers are considered. It is shown that electron-positron pair instability is a consequence of dimensionality reduction, not of the size quantization. The binding energies for the Ps in circular and spherical QDs are calculated. The Ps formation dependence on the QD radius is studied.
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Affiliation(s)
- Karen G Dvoyan
- Department of Mathematics and Physics, North Carolina Central University, 1801 Fayetteville St., Durham, NC 27707, USA
| | - Sergey G Matinyan
- Department of Mathematics and Physics, North Carolina Central University, 1801 Fayetteville St., Durham, NC 27707, USA
| | - Branislav Vlahovic
- Department of Mathematics and Physics, North Carolina Central University, 1801 Fayetteville St., Durham, NC 27707, USA
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17
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Abstract
Physical positioning of scintillation crystal detector blocks in Positron Emission Tomography (PET) scanners is not always exact. We test a proof of concept methodology for the determination of the six degrees of freedom for detector block positioning errors by utilizing a rotating point source over stepped axial intervals. To test our method, we created computer simulations of seven Micro Crystal Element Scanner (MiCES) PET systems with randomized positioning errors. The computer simulations show that our positioning algorithm can estimate the positions of the block detectors to an average of one-seventh of the crystal pitch tangentially, and one-third of the crystal pitch axially. Virtual acquisitions of a point source grid and a distributed phantom show that our algorithm improves both the quantitative and qualitative accuracy of the reconstructed objects. We believe this estimation algorithm is a practical and accurate method for determining the spatial positions of scintillation detector blocks.
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Affiliation(s)
- Larry Pierce
- Department of Radiology, Image Research Laboratory, University of Washington, Seattle, WA, 98195
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