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Interobserver and intraobserver agreement on prostate-specific membrane antigen PET/CT images according to the miTNM and PSMA-RADS criteria. Nucl Med Commun 2021; 41:759-767. [PMID: 32453205 DOI: 10.1097/mnm.0000000000001219] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
AIM In this study, we aimed to measure interobserver and intraobserver agreement in Ga-68-prostate-specific membrane antigen (PSMA) PET/computed tomography (CT) image interpretation. In addition, the limitations of these criteria and levels of personal confidence reported by the readers when reporting the findings were determined. The effects of interpersonal differences on clinical decisions were also investigated. METHODS PSMA PET images from 133 cases were reported independently by four different readers at different times according to the molecular imaging TNM (miTNM) and PSMA-reporting and data system (RADS) templates. RESULTS There was substantial interobserver agreement for overall positivity, miT, miN and miM staging (Fleiss' κ = 0.65, 0.625, 0.731, and 0.779). Substantial agreement levels were observed in reporting of seminal vesicle invasion, the number of lymph node stations with metastasis, total number of intraprostatic areas containing tumors, and lymph node metastasis staging (Fleiss' κ = 0.622 and 0.779). The highest variation was seen in the reporting of intraprostatic distribution: In International Society of Urological Pathology (ISUP) grade group 1, moderate agreement was observed, and it was seen that the agreement level for the T staging increased with an increasing ISUP group in the staging group (Fleiss' κ = 0.531 vs. 0.655). There was near-perfect interobserver agreement in the reporting of five-point PSMA-RADS scoring [intraclass correlation coefficient (ICC) κ = 0.904; 95% CI, 0.865-0.934]. Disagreement according to miTNM staging had a major effect on clinical management in only 9% (n = 12) of the patients. CONCLUSION PSMA PET has a lower interobserver variability and higher reproducibility than other imaging methods used for imaging of prostate cancer do, including CT, MRI, and bone scintigraphy. The miTNM template provides a reporting format that is highly reproducible and has a high level of agreement among readers, but the prostatic template needs development. In contrast, the PSMA-RADS system leads to slightly increased interobserver reporting differences and reduces personal confidence, but at the same time, it still exhibits almost-perfect agreement in terms of scoring.
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Synthesis and preclinical evaluation of an Al 18F radiofluorinated bivalent PSMA ligand. Eur J Med Chem 2021; 221:113502. [PMID: 33965863 DOI: 10.1016/j.ejmech.2021.113502] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/12/2021] [Accepted: 04/16/2021] [Indexed: 11/22/2022]
Abstract
Prostate-specific membrane antigen (PSMA) has become as an outstanding prostate cancer-related target for diagnostic imaging and targeted radiotherapy. Clinical studies on a few PSMA radiotracers are currently underway to determine their efficacy as imaging agents to detect prostate cancer. To improve tumor retention and tumor-to-normal tissue contrast, we herein report the synthesis and preclinical evaluation of an Al18F-labeled bivalent PSMA ligand (18F-Bi-PSMA). 18F-Bi-PSMA was successful automated preparation and in vitro evaluation showed that 18F-Bi-PSMA was potent binding affinity, high specificity, and rapid internalization in PSMA-expressing cells. Biodistribution studies revealed a high and specific tumor uptake of 20.5 ± 3.5 %ID/g in 22Rv1 tumor-bearing mice. Furthermore, compared to the clinically used monomeric PSMA-targeting tracers, 68Ga-PSMA-11 and 18F-PSMA-1007, 18F-Bi-PSMA exhibited improved pharmacokinetics and higher tumor uptake, as well as better tumor-to-normal tissue contrast, resulting in considerably high imaging quality. Our findings indicated that the bivalent PSMA radioligand, 18F-Bi-PSMA, was successfully synthesized and ideal imaging properties.
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Garnuszek P, Karczmarczyk U, Maurin M, Sikora A, Zaborniak J, Pijarowska-Kruszyna J, Jaroń A, Wyczółkowska M, Wojdowska W, Pawlak D, Lipiński PFJ, Mikołajczak R. PSMA-D4 Radioligand for Targeted Therapy of Prostate Cancer: Synthesis, Characteristics and Preliminary Assessment of Biological Properties. Int J Mol Sci 2021; 22:2731. [PMID: 33800517 PMCID: PMC7962978 DOI: 10.3390/ijms22052731] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/26/2021] [Accepted: 02/26/2021] [Indexed: 12/25/2022] Open
Abstract
A new PSMA ligand (PSMA-D4) containing the Glu-CO-Lys pharmacophore connected with a new linker system (L-Trp-4-Amc) and chelator DOTA was developed for radiolabeling with therapeutic radionuclides. Herein we describe the synthesis, radiolabeling, and preliminary biological evaluation of the novel PSMA-D4 ligand. Synthesized PSMA-D4 was characterized using TOF-ESI-MS, NMR, and HPLC methods. The novel compound was subject to molecular modeling with GCP-II to compare its binding mode to analogous reference compounds. The radiolabeling efficiency of PSMA-D4 with 177Lu, 90Y, 47Sc, and 225Ac was chromatographically tested. In vitro studies were carried out in PSMA-positive LNCaP tumor cells membranes. The ex vivo tissue distribution profile of the radioligands and Cerenkov luminescence imaging (CLI) was studied in LNCaP tumor-bearing mice. PSMA-D4 was synthesized in 24% yield and purity >97%. The radio complexes were obtained with high yields (>97%) and molar activity ranging from 0.11 to 17.2 GBq mcmol-1, depending on the radionuclide. In vitro assays confirmed high specific binding and affinity for all radiocomplexes. Biodistribution and imaging studies revealed high accumulation in LNCaP tumor xenografts and rapid clearance of radiocomplexes from blood and non-target tissues. These render PSMA-D4 a promising ligand for targeted therapy of prostate cancer (PCa) metastases.
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Affiliation(s)
- Piotr Garnuszek
- National Centre for Nuclear Research, Radioisotope Centre POLATOM, 05-400 Otwock, Poland; (P.G.); (M.M.); (A.S.); (J.P.-K.); (A.J.); (M.W.); (W.W.); (D.P.); (R.M.)
| | - Urszula Karczmarczyk
- National Centre for Nuclear Research, Radioisotope Centre POLATOM, 05-400 Otwock, Poland; (P.G.); (M.M.); (A.S.); (J.P.-K.); (A.J.); (M.W.); (W.W.); (D.P.); (R.M.)
| | - Michał Maurin
- National Centre for Nuclear Research, Radioisotope Centre POLATOM, 05-400 Otwock, Poland; (P.G.); (M.M.); (A.S.); (J.P.-K.); (A.J.); (M.W.); (W.W.); (D.P.); (R.M.)
| | - Arkadiusz Sikora
- National Centre for Nuclear Research, Radioisotope Centre POLATOM, 05-400 Otwock, Poland; (P.G.); (M.M.); (A.S.); (J.P.-K.); (A.J.); (M.W.); (W.W.); (D.P.); (R.M.)
| | | | - Justyna Pijarowska-Kruszyna
- National Centre for Nuclear Research, Radioisotope Centre POLATOM, 05-400 Otwock, Poland; (P.G.); (M.M.); (A.S.); (J.P.-K.); (A.J.); (M.W.); (W.W.); (D.P.); (R.M.)
| | - Antoni Jaroń
- National Centre for Nuclear Research, Radioisotope Centre POLATOM, 05-400 Otwock, Poland; (P.G.); (M.M.); (A.S.); (J.P.-K.); (A.J.); (M.W.); (W.W.); (D.P.); (R.M.)
| | - Monika Wyczółkowska
- National Centre for Nuclear Research, Radioisotope Centre POLATOM, 05-400 Otwock, Poland; (P.G.); (M.M.); (A.S.); (J.P.-K.); (A.J.); (M.W.); (W.W.); (D.P.); (R.M.)
| | - Wioletta Wojdowska
- National Centre for Nuclear Research, Radioisotope Centre POLATOM, 05-400 Otwock, Poland; (P.G.); (M.M.); (A.S.); (J.P.-K.); (A.J.); (M.W.); (W.W.); (D.P.); (R.M.)
| | - Dariusz Pawlak
- National Centre for Nuclear Research, Radioisotope Centre POLATOM, 05-400 Otwock, Poland; (P.G.); (M.M.); (A.S.); (J.P.-K.); (A.J.); (M.W.); (W.W.); (D.P.); (R.M.)
| | - Piotr F. J. Lipiński
- Department of Neuropeptides, Mossakowski Medical Research Center Polish Academy of Sciences, 02-106 Warsaw, Poland;
| | - Renata Mikołajczak
- National Centre for Nuclear Research, Radioisotope Centre POLATOM, 05-400 Otwock, Poland; (P.G.); (M.M.); (A.S.); (J.P.-K.); (A.J.); (M.W.); (W.W.); (D.P.); (R.M.)
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Shaygan B, Zukotynski K, Bénard F, Ménard C, Kuk J, Sistani G, Bauman G, Veit-Haibach P, Metser U. Canadian Urological Association best practice report: Prostate-specific membrane antigen positron emission tomography/computed tomography (PSMA PET/CT) and PET/magnetic resonance (MR) in prostate cancer. Can Urol Assoc J 2021; 15:162-172. [PMID: 33661093 DOI: 10.5489/cuaj.7268] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Prostate-specific membrane antigen (PSMA)-targeted positron emission tomography (PET) is increasingly being used worldwide as part of the clinical workup for men with prostate cancer. With high overall accuracy for the detection of prostate cancer, PSMA-targeted PET has an increasingly established role in the setting of biochemical failure after primary therapy and an evolving role in the setting of initial disease staging; its utility for guiding management in the setting of metastatic disease is less clear. Although the specificity is high, familiarization with potential pitfalls in the interpretation of PSMA-targeted PET, including knowledge of the causes for false-positive and negative examinations, is critical. The aim of this best practice report is to provide an illustrative discussion of the current and evolving clinical indications for PSMA-targeted PET, as well as a review of physiological radiopharmaceutical biodistribution and potential imaging pitfalls.
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Affiliation(s)
- Bobby Shaygan
- Department of Urology, McMaster University, Hamilton, ON, Canada
| | - Katherine Zukotynski
- Departments of Medicine and Radiology, McMaster University, Hamilton, ON, Canada
| | - François Bénard
- PET Functional Imaging, BC Cancer, Vancouver, BC, Canada.,Department of Radiology, University of British Columbia, Vancouver, BC, Canada
| | - Cynthia Ménard
- Department of Radiation Oncology, Université de Montréal, Montreal, QC, Canada
| | - Joda Kuk
- Grand River Regional Cancer Centre, Grand River Hospital, Kitchener, ON, Canada
| | - Golmehr Sistani
- Department of Medical Imaging, Western University, London, ON, Canada
| | - Glenn Bauman
- Department of Oncology, Western University, London, ON, Canada
| | | | - Ur Metser
- Joint Department of Medical Imaging, University of Toronto, Toronto, ON, Canada
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Bandari RP, Carmack TL, Malhotra A, Watkinson L, Fergason Cantrell EA, Lewis MR, Smith CJ. Development of Heterobivalent Theranostic Probes Having High Affinity/Selectivity for the GRPR/PSMA. J Med Chem 2021; 64:2151-2166. [PMID: 33534560 DOI: 10.1021/acs.jmedchem.0c01785] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this study, we describe the development of heterobivalent [DUPA-6-Ahx-([111In]In-DO3A)-8-Aoc-BBN ANT] and [DUPA-6-Ahx-([177Lu]Lu-DO3A)-8-Aoc-BBN ANT] radiotracers that display very high selectivity/specificity for gastrin-releasing peptide receptor (GRPR)-/prostate-specific membrane antigen (PSMA)-expressing cells. These studies include metallation, purification, characterization, and in vitro and in vivo evaluation of the new small-molecule-/peptide-based radiopharmaceuticals having utility for imaging and potentially therapy. Competitive displacement binding assays using PC-3 cells and LNCaP cell membranes showed high binding affinity for the GRPR or the PSMA. Biodistribution studies showed favorable excretion pharmacokinetics with high tumor uptake in PC-3 or PC-3 prostatic inhibin peptide (PIP) tumor-bearing mice. For example, tumor accumulation at the 1 h time point ranged from (4.74 ± 0.90) to (7.51 ± 2.61)%ID/g. Micro-single-photon emission computed tomography (microSPECT) molecular imaging investigations showed very high uptake in tumors with minimal accumulation of tracers in the surrounding collateral tissues in xenografted mice at 4 h postintravenous injection. In conclusion, [DUPA-6-Ahx-([111In]In-DO3A)-8-Aoc-BBN ANT] and [DUPA-6-Ahx-([177Lu]Lu-DO3A)-8-Aoc-BBN ANT] tracers displayed favorable pharmacokinetic and excretion profiles with high uptake and retention in tumors.
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Affiliation(s)
- Rajendra P Bandari
- Research Division, Harry S. Truman Memorial Veterans' Hospital, Research Service Room A005, 800 Hospital Drive, Columbia, Missouri 65201, United States.,Department of Radiology, University of Missouri School of Medicine, Columbia, Missouri 65211, United States
| | - Terry L Carmack
- Research Division, Harry S. Truman Memorial Veterans' Hospital, Research Service Room A005, 800 Hospital Drive, Columbia, Missouri 65201, United States.,University of Missouri Research Reactor Center, University of Missouri, Columbia, Missouri 65211, United States
| | - Anil Malhotra
- Research Division, Harry S. Truman Memorial Veterans' Hospital, Research Service Room A005, 800 Hospital Drive, Columbia, Missouri 65201, United States
| | - Lisa Watkinson
- Research Division, Harry S. Truman Memorial Veterans' Hospital, Research Service Room A005, 800 Hospital Drive, Columbia, Missouri 65201, United States.,University of Missouri Research Reactor Center, University of Missouri, Columbia, Missouri 65211, United States
| | - Emily A Fergason Cantrell
- Research Division, Harry S. Truman Memorial Veterans' Hospital, Research Service Room A005, 800 Hospital Drive, Columbia, Missouri 65201, United States.,University of Missouri Research Reactor Center, University of Missouri, Columbia, Missouri 65211, United States
| | - Michael R Lewis
- Department of Veterinary Medicine and Surgery, University of Missouri College of Veterinary Medicine, Columbia, Missouri 65211, United States
| | - Charles J Smith
- Research Division, Harry S. Truman Memorial Veterans' Hospital, Research Service Room A005, 800 Hospital Drive, Columbia, Missouri 65201, United States.,Department of Radiology, University of Missouri School of Medicine, Columbia, Missouri 65211, United States.,University of Missouri Research Reactor Center, University of Missouri, Columbia, Missouri 65211, United States
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Li Y, Chyan MK, Hamlin DK, Nguyen H, Vessella R, Wilbur DS. Evaluation of radioiodinated protein conjugates and their potential metabolites containing lysine-urea-glutamate (LuG), PEG and closo-decaborate(2-) as models for targeting astatine-211 to metastatic prostate cancer. Nucl Med Biol 2021; 92:217-227. [PMID: 32409263 PMCID: PMC7606587 DOI: 10.1016/j.nucmedbio.2020.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 04/29/2020] [Indexed: 12/18/2022]
Abstract
INTRODUCTION The use of lysine-urea-glutamate (LuG) for targeting the PSMA antigen on prostate cancer (PCa) is a promising method for delivering the alpha particle-emitting radionuclide astatine-211 (211At) to metastatic PCa. High kidney localization has been a problem with radiolabeled LuG derivatives, but has been adequately addressed in radiometal-labeled DOTA-LuG derivatives by linker optimization. Herein, we report an investigation of an alternate approach to diminishing the kidney concentrations of radiolabeled LuG-containing compounds. METHODS Our approach involves PEGylated LuG moieties and closo-decaborate (2-) moieties conjugated to streptavidin (SAv) or human serum albumin (HSA). After preparing the LuG conjugates, SAv and HSA conjugates were succinylated to decrease their kidney localization and radioiodinated for evaluation in athymic mice bearing C4-2B osseous PCa tumor xenografts. RESULTS Covalently attaching LuG to succinylated SAv and HSA significantly reduced kidney localization, but unfortunately succinylation resulted in decreased tumor concentrations. In contrast, a potential metabolite [131I]16b, an unconjugated LuG derivative containing a dPEG4® linker, provided tumor concentrations of ~15% ID/g at 4 h pi. A second unconjugated LuG derivative with a similar structure, but containing a dPEG12® linker, [131I]16a had tumor concentrations of ~4%ID/g at 4 h pi. Those results suggest that long PEG linkers also affect tumor localization in a negative manner. CONCLUSION Conjugation of PEGylated LuG derivatives to proteins can be an effective approach to diminishing kidney localization of radiolabeled LuG reagents, but the protein, linker and the method of linkage need to be further studied. Additionally, modification of the unconjugated 16b to decrease kidney localization may provide PCa targeting agents for use with radiohalogens, including 211At. Advances in knowledge and implications for patient care: This study is the first to evaluate PEGylated LuG and closo-decaborate (2-) moieties conjugated to proteins as potential methods for diminishing the kidney concentrations of radiolabeled LuG-containing compounds.
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Affiliation(s)
- Yawen Li
- Radiochemistry Division, Department of Radiation Oncology, University of Washington, Seattle, WA 98105, United States of America
| | - Ming-Kuan Chyan
- Radiochemistry Division, Department of Radiation Oncology, University of Washington, Seattle, WA 98105, United States of America
| | - Donald K Hamlin
- Radiochemistry Division, Department of Radiation Oncology, University of Washington, Seattle, WA 98105, United States of America
| | - Holly Nguyen
- GU Cancer Research Lab, Department of Urology, University of Washington, Seattle, WA 98195, United States of America
| | - Robert Vessella
- GU Cancer Research Lab, Department of Urology, University of Washington, Seattle, WA 98195, United States of America
| | - D Scott Wilbur
- Radiochemistry Division, Department of Radiation Oncology, University of Washington, Seattle, WA 98105, United States of America.
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Carlucci G, Ippisch R, Slavik R, Mishoe A, Blecha J, Zhu S. 68Ga-PSMA-11 NDA Approval: A Novel and Successful Academic Partnership. J Nucl Med 2020; 62:149-155. [PMID: 33443068 PMCID: PMC8679592 DOI: 10.2967/jnumed.120.260455] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 12/16/2020] [Indexed: 11/16/2022] Open
Abstract
The University of California Los Angeles (UCLA) and University of California San Francisco (UCSF) codeveloped 68Ga-PSMA-11 by conducting a bicentric pivotal phase 3 clinical trial for PET imaging for prostate cancer. On December 1, 2020, 2 separate new drug applications (NDAs) submitted by each institution (NDA 212642 for UCLA and NDA 212643 for UCSF) were approved by the Food and Drug Administration as the first drug for PET imaging of prostate-specific membrane antigen (PSMA)–positive lesions in men with prostate cancer. This article briefly describes the background, clinical development, regulatory approach, and regulatory process for NDA filing and approval. In the second part of this article, key chemistry, manufacturing, and controls (CMC) information is provided to facilitate abbreviated new drug application (ANDA) submission.
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Affiliation(s)
- Giuseppe Carlucci
- Ahmanson Translational Theranostics Division, Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California; and
| | - Robin Ippisch
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California
| | - Roger Slavik
- Ahmanson Translational Theranostics Division, Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California; and
| | - Ashley Mishoe
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California
| | - Joseph Blecha
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California
| | - Shaojun Zhu
- Ahmanson Translational Theranostics Division, Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California; and
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Petrov SA, Machulkin AE, Uspenskaya AA, Zyk NY, Nimenko EA, Garanina AS, Petrov RA, Polshakov VI, Grishin YK, Roznyatovsky VA, Zyk NV, Majouga AG, Beloglazkina EK. Polypeptide-Based Molecular Platform and Its Docetaxel/Sulfo-Cy5-Containing Conjugate for Targeted Delivery to Prostate Specific Membrane Antigen. Molecules 2020; 25:molecules25245784. [PMID: 33302417 PMCID: PMC7762530 DOI: 10.3390/molecules25245784] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/03/2020] [Accepted: 12/06/2020] [Indexed: 01/29/2023] Open
Abstract
A strategy for stereoselective synthesis of molecular platform for targeted delivery of bimodal therapeutic or theranostic agents to the prostate-specific membrane antigen (PSMA) receptor was developed. The proposed platform contains a urea-based, PSMA-targeting Glu-Urea-Lys (EuK) fragment as a vector moiety and tripeptide linker with terminal amide and azide groups for subsequent addition of two different therapeutic and diagnostic agents. The optimal method for this molecular platform synthesis includes (a) solid-phase assembly of the polypeptide linker, (b) coupling of this linker with the vector fragment, (c) attachment of 3-aminopropylazide, and (d) amide and carboxylic groups deprotection. A bimodal theranostic conjugate of the proposed platform with a cytostatic drug (docetaxel) and a fluorescent label (Sulfo-Cy5) was synthesized to demonstrate its possible sequential conjugation with different functional molecules.
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Affiliation(s)
- Stanislav A. Petrov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
| | - Aleksei E. Machulkin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
- Laboratory of Biomedical Nanomaterials, National University of Science and Technology MISiS, Leninskiy pr., 4, 119049 Moscow, Russia
| | - Anastasia A. Uspenskaya
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
| | - Nikolay Y. Zyk
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
| | - Ekaterina A. Nimenko
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
| | - Anastasia S. Garanina
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
- Laboratory of Biomedical Nanomaterials, National University of Science and Technology MISiS, Leninskiy pr., 4, 119049 Moscow, Russia
| | - Rostislav A. Petrov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
| | - Vladimir I. Polshakov
- Faculty of Fundamental Medicine, Lomonosov Moscow State University, Lomonosovsky Ave., 27-1, 119991 Moscow, Russia;
| | - Yuri K. Grishin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
| | - Vitaly A. Roznyatovsky
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
| | - Nikolay V. Zyk
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
| | - Alexander G. Majouga
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
- Laboratory of Biomedical Nanomaterials, National University of Science and Technology MISiS, Leninskiy pr., 4, 119049 Moscow, Russia
- Mendeleev University of Chemical Technology of Russia, Miusskaya sq. 9, 125947 Moscow, Russia
| | - Elena K. Beloglazkina
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, 119991 Moscow, Russia; (S.A.P.); (A.E.M.); (A.A.U.); (N.Y.Z.); (E.A.N.); (A.S.G.); (R.A.P.); (Y.K.G.); (V.A.R.); (N.V.Z.); (A.G.M.)
- Correspondence:
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Zhao R, Ploessl K, Zha Z, Choi S, Alexoff D, Zhu L, Kung HF. Synthesis and Evaluation of 68Ga- and 177Lu-Labeled ( R)- vs ( S)-DOTAGA Prostate-Specific Membrane Antigen-Targeting Derivatives. Mol Pharm 2020; 17:4589-4602. [PMID: 33108189 DOI: 10.1021/acs.molpharmaceut.0c00777] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Prostate-specific membrane antigen (PSMA) is overexpressed in prostate cancer cells and therefore is an attractive target for prostate cancer diagnosis and radionuclide therapy. Recently, published results from clinical studies using a new PSMA-targeting PET imaging agent, [68Ga]Ga-PSMA-093 ([68Ga]Ga-HBED-CC-O-carboxymethyl-Tyr-CO-NH-Glu), support the development of this agent for the diagnosis of prostate cancer. In this study, the HBED-CC chelating group in PSMA-093 was replaced by stereoselective (R)- or (S)-DOTAGA. This chelating group serves not only for chelating 68Ga but is also amendable for complexing other radioactive metals for radionuclide therapy. The corresponding optically pure (R)- and (S)-[68Ga/177Lu]-DOTAGA derivatives, (R)-[68Ga/177Lu]-13 and (S)-[68Ga/177Lu]-13, were successfully prepared. Comparison of radiolabeling, binding affinity, cell uptake, and biodistribution between the two isomers was performed. Radiolabeling of (R)-[177Lu]Lu-13 and (S)-[177Lu]Lu-13 at 50 °C suggested that rates of complex formation were time-dependent and the formation of (S)-[177Lu]Lu-13 was distinctly faster. The rates of complex formation for the corresponding 68Ga agents were comparable between structural isomers. The natGa and natLu equivalents showed high binding PSMA affinity (IC50 = 24-111 nM), comparable to that of the parent agent, [natGa]Ga-PSMA-093 (IC50 = 34.0 nM). Results of cell uptake and biodistribution studies in PSMA-expressing PC3-PIP tumor-bearing mice appeared to show no difference between the labeled (R)- and (S)-isomers. This is the first time that a pair of [68Ga/177Lu]-(R)- and (S)-DOTAGA isomers of PSMA agents were evaluated. Results of biological studies between the isomers showed no noticeable difference; however, the distinctions on the rate of Lu complex formation should be considered in the development of new 177Lu-DOTAGA-based radionuclide therapy agents in the future.
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Affiliation(s)
- Ruiyue Zhao
- College of Chemistry, Beijing Normal University, Beijing 100875, PR China
| | - Karl Ploessl
- Five Eleven Pharma Inc., Philadelphia, Pennsylvania 19104, United States
| | - Zhihao Zha
- Five Eleven Pharma Inc., Philadelphia, Pennsylvania 19104, United States
| | - Seokrye Choi
- Five Eleven Pharma Inc., Philadelphia, Pennsylvania 19104, United States
| | - David Alexoff
- Five Eleven Pharma Inc., Philadelphia, Pennsylvania 19104, United States
| | - Lin Zhu
- College of Chemistry, Beijing Normal University, Beijing 100875, PR China
| | - Hank F Kung
- Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States.,Five Eleven Pharma Inc., Philadelphia, Pennsylvania 19104, United States
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Hassan TAAEH, Elazab MS. The diagnostic value of PET/CT imaging with the 68Ga-labeled PSMA-ligand in the follow up assessment of prostate cancer after therapy. THE EGYPTIAN JOURNAL OF RADIOLOGY AND NUCLEAR MEDICINE 2020. [DOI: 10.1186/s43055-020-00259-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
The aim of this study is to investigate the role of PET/CT imaging with the 68Ga-labeled PSMA-ligand in the follow up assessment of post-operative and post-therapeutic cases of prostate cancer. All data were collected and analyzed retrospectively, enrolling 30 patients (their age range from 53 to 80 years with a mean age 67.8). The patients had been referred to a private imaging center for their assessment by 68Ga-labeled PSMA-ligand PET/CT.
Results
By 68Ga-labeled PSMA-ligand PET/CT, prostatic recurrent/residual neoplastic lesion was depicted in 23 (76.6%) patients, nodal metastases was present in 7 (23.3%) patients, and distant metastasis was present in 11 (36.6%) patients. The clinical and/or PSA level and/or radiological follow-up and/or the histopathological assessment for the patients served as a reference in the present study.The 68Ga-labeled PSMA-ligand PET/CT had sensitivity, specificity, positive predictive value, negative predictive value, and an overall accuracy (96.5%, 100%, 100%, 50%, and 96.6%) respectively.
Conclusion
68Ga-labeled PSMA-ligand PET/CT is a very helpful tool for detection of prostatic cancer residual/recurrent lesions and restaging which can help in performing treatment plans and improve the clinical outcome and survival of the patients.
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61
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Acar E, Bekiş R, Polack B. Comparison of Bone Uptake in Bone Scan and Ga-68 PSMA PET/CT Images in Patients with Prostate Cancer. Curr Med Imaging 2020; 15:589-594. [PMID: 32008568 DOI: 10.2174/1573405615666190225155254] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 02/02/2019] [Accepted: 02/20/2019] [Indexed: 01/22/2023]
Abstract
OBJECTIVE The aim of this study was to compare images from Tc-99m MDP bone scan (BS) and Ga-68 PSMA PET/CT of patients with prostate cancer in terms of bone metastases. METHODS Overall, 34 patients exhibited a mean age of 66 ± 9.5 (50-88) years, mean PSA of 51 ± 159ng/ml (0-912), and mean Gleason score of 8 (6-9). BS and Ga-68 PSMA PET/CT were applied to 34 patients within 30 days, and the results were evaluated, retrospectively. In both tests, radiopharmaceutical uptake in bones were compared. RESULTS In 7 patients (20.5%), uptake was not significant on BS and Ga-68 PSMA PET / CT images, which is related to metastasis. In 14 (41%) patients, bone metastases were observed in both examinations. However, more metastatic lesions were observed in the Ga-68 PSMA PET/CT of 3 patients and in the bone scintigraphy of 2 patients. PSMA expression was not observed on Ga-68 PSMA PET / CT in 13 (38%) patients with increased activity in bone scintigraphy. Two (6%) of these patients were thought to be metastatic, 2 (6%) were suspicious for metastasis, and 9 (26%) had no metastasis. When a lesion-based evaluation was performed, a total of 480 activities were evaluated: increased activity uptake was found in 305 BS, and 427 PSMA expression activity was detected. Furthermore, 435 of these activities were evaluated as metastatic. CONCLUSION Ga-68 PSMA PET/CT provides an additional contribution to the BS evaluation of activity areas because of the presence of PSMA expression and anatomical lesions. In 6% of the patients, activity on BS and metastatic appearance in CT images were observed and the presence of lesions in the absence of PSMA was determined. This suggests that bone metastases without PSMA expression may also be present.
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Affiliation(s)
- Emine Acar
- Department of Nuclear Medicine, School of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Recep Bekiş
- Department of Nuclear Medicine, School of Medicine, Dokuz Eylul University, Izmir, Turkey
| | - Berna Polack
- Department of Nuclear Medicine, School of Medicine, Dokuz Eylul University, Izmir, Turkey
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Noor A, Van Zuylekom JK, Rudd SE, Waldeck K, Roselt PD, Haskali MB, Wheatcroft MP, Yan E, Hicks RJ, Cullinane C, Donnelly PS. Bivalent Inhibitors of Prostate-Specific Membrane Antigen Conjugated to Desferrioxamine B Squaramide Labeled with Zirconium-89 or Gallium-68 for Diagnostic Imaging of Prostate Cancer. J Med Chem 2020; 63:9258-9270. [PMID: 32786229 DOI: 10.1021/acs.jmedchem.0c00291] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Prostate-specific membrane antigen (PSMA) is a carboxypeptidase that is overexpressed in prostate cancer and is an excellent candidate for targeted diagnostic imaging and therapy. Lysine-ureido-glutamate inhibitors of PSMA radiolabeled with positron-emitting radionuclides can be used for diagnostic imaging with positron emission tomography (PET). A squaramide ester derivative of desferrioxamine B (H3DFOSq) was used to prepare four new agents with either one or two lysine-ureido-glutamate pharmacophores. The H3DFOSq ligand can be used to form stable complexes with either of the positron-emitting radionuclides gallium-68 (t1/2 = 68 min) or zirconium-89 (t1/2 = 3.3 days). The complexes were evaluated in PSMA-positive xenograft mouse models. Bivalent inhibitors, where two pharmacophores are tethered to a single DFOSq ligand, have better tumor uptake than their monovalent analogues. The ligands presented here, which can be labeled with either gallium-68 or zirconium-89, have the potential to increase the number of clinical sites that can perform diagnostic PET imaging.
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Affiliation(s)
- Asif Noor
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia
| | | | - Stacey E Rudd
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Kelly Waldeck
- Research Division, Peter MacCallum Cancer Centre, Melbourne, Victoria 3000, Australia
| | - Peter D Roselt
- Research Division, Peter MacCallum Cancer Centre, Melbourne, Victoria 3000, Australia
| | - Mohammad B Haskali
- Research Division, Peter MacCallum Cancer Centre, Melbourne, Victoria 3000, Australia
| | - Michael P Wheatcroft
- Telix Pharmaceuticals Limited, Suite 401, 55 Flemington Road, North Melbourne, Victoria 3051, Australia
| | - Eddie Yan
- Telix Pharmaceuticals Limited, Suite 401, 55 Flemington Road, North Melbourne, Victoria 3051, Australia
| | - Rodney J Hicks
- Research Division, Peter MacCallum Cancer Centre, Melbourne, Victoria 3000, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3052, Australia
| | - Carleen Cullinane
- Research Division, Peter MacCallum Cancer Centre, Melbourne, Victoria 3000, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria 3052, Australia
| | - Paul S Donnelly
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia
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63
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Van den Wyngaert T, Elvas F, De Schepper S, Kennedy JA, Israel O. SPECT/CT: Standing on the Shoulders of Giants, It Is Time to Reach for the Sky! J Nucl Med 2020; 61:1284-1291. [PMID: 32620702 DOI: 10.2967/jnumed.119.236943] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 05/28/2020] [Indexed: 12/11/2022] Open
Abstract
Twenty years ago, SPECT/CT became commercially available, combining the strengths of both techniques: the diagnostic sensitivity of SPECT and the anatomic detail of CT. Other benefits initially included attenuation correction of SPECT reconstructions, ultimately evolving to correction techniques that would enable absolute tracer uptake quantification. Recent developments in SPECT hardware include solid-state digital systems with higher sensitivity and resolution, using novel collimator designs based on tungsten. Similar advances in CT technology have been introduced in hybrid SPECT/CT systems, replacing low-end x-ray tubes with high-end multislice CT scanners equipped with iterative reconstruction, metal artifact reduction algorithms, and dual-energy capabilities. More recently, the design of whole-body SPECT/CT systems has taken another major leap with the introduction of a ring-shaped gantry equipped with multiple movable detectors surrounding the patient. These exciting developments have fueled efforts to develop novel SPECT radiopharmaceuticals, creating new chelators and prosthetic groups for radiolabeling. Innovative SPECT radionuclide pairs have now become available for radiolabeling with the potential for use as theranostic agents. The growth of precision medicine and the associated need for accurate radionuclide treatment dosimetry will likely drive the use of SPECT/CT in the near future. In addition, expanding clinical applications of SPECT/CT in other areas such as orthopedics offer exciting opportunities. Although it is true that the SPECT/CT ecosystem has seen several challenges during its development over the past 2 decades, it is now a feature-rich and mature tool ready for clinical prime time.
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Affiliation(s)
- Tim Van den Wyngaert
- Nuclear Medicine, Antwerp University Hospital, Edegem, Belgium .,Integrated Personalized and Precision Oncology Network, Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
| | - Filipe Elvas
- Nuclear Medicine, Antwerp University Hospital, Edegem, Belgium.,Integrated Personalized and Precision Oncology Network, Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
| | - Stijn De Schepper
- Nuclear Medicine, Antwerp University Hospital, Edegem, Belgium.,Integrated Personalized and Precision Oncology Network, Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium
| | - John A Kennedy
- Department of Nuclear Medicine, Rambam Healthcare Campus, Haifa, Israel; and.,Rappaport School of Medicine, Israel Institute of Technology, Haifa, Israel
| | - Ora Israel
- Rappaport School of Medicine, Israel Institute of Technology, Haifa, Israel
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Rosenfeld L, Sananes A, Zur Y, Cohen S, Dhara K, Gelkop S, Ben Zeev E, Shahar A, Lobel L, Akabayov B, Arbely E, Papo N. Nanobodies Targeting Prostate-Specific Membrane Antigen for the Imaging and Therapy of Prostate Cancer. J Med Chem 2020; 63:7601-7615. [PMID: 32442375 PMCID: PMC7383930 DOI: 10.1021/acs.jmedchem.0c00418] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
![]()
The repertoire of
methods for the detection and chemotherapeutic
treatment of prostate cancer (PCa) is currently limited. Prostate-specific
membrane antigen (PSMA) is overexpressed in PCa tumors and can be
exploited for both imaging and drug delivery. We developed and characterized
four nanobodies that present tight and specific binding and internalization
into PSMA+ cells and that accumulate specifically in PSMA+ tumors. We then conjugated one of these nanobodies to the
cytotoxic drug doxorubicin, and we show that the conjugate internalizes
specifically into PSMA+ cells, where the drug is released
and induces cytotoxic activity. In vivo studies show
that the extent of tumor growth inhibition is similar when mice are
treated with commercial doxorubicin and with a 42-fold lower amount
of the nanobody-conjugated doxorubicin, attesting to the efficacy
of the conjugated drug. These data highlight nanobodies as promising
agents for the imaging of PCa tumors and for the targeted delivery
of chemotherapeutic drugs.
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Affiliation(s)
- Lior Rosenfeld
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering and the National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Amiram Sananes
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering and the National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Yuval Zur
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering and the National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Shira Cohen
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Kalyan Dhara
- Department of Chemistry and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Sigal Gelkop
- Department of Virology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Efrat Ben Zeev
- The Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Anat Shahar
- The National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Leslie Lobel
- Department of Virology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Barak Akabayov
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Eyal Arbely
- Department of Chemistry and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Niv Papo
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering and the National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
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65
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Plasma enabled devices for the selective capture and photodynamic identification of prostate cancer cells. Biointerphases 2020; 15:031002. [PMID: 32414237 DOI: 10.1116/6.0000047] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Prostate cancer is the second most common cancer in men and the second leading cause of male cancer deaths. The current blood test for detecting prostate cancers measures prostate-specific antigen. It has many limitations including a very high rate of false positives. Herein, prostate-specific membrane antigen (PSMA) based immunocapture and hexaminolevulinate (HAL) based photodetection are integrated into a new diagnostic device designed to selectively identify whole prostate cancer cells from voided urine with the aim of providing an accurate noninvasive alternative to current diagnosis methods. Prestained, prostate cancer cells spiked in urine samples at concentrations ranging from 1500 to 2000 cells/ml were captured with 89% sensitivity and 95% specificity. HAL, a cancer specific photosensitizer, was then used to circumvent the need for prestaining. Optimum HAL incubation conditions were identified (50 μM at 37 °C for 2 h) where the mean HAL-induced fluorescence intensity of LNCaP cells was three times that of healthy PNT2 cells, thus providing an independent way to discriminate captured cancer cells from background metabolites. Combining anti-PSMA immunocapture with HAL-induced fluorescent detection, 86% sensitivity and 88% selectivity were achieved, thereby proving the validity of the dual-method for the selective photospecific detection of prostate cancer cells.
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66
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Tanjore Ramanathan J, Lehtipuro S, Sihto H, Tóvári J, Reiniger L, Téglási V, Moldvay J, Nykter M, Haapasalo H, Le Joncour V, Laakkonen P. Prostate-specific membrane antigen expression in the vasculature of primary lung carcinomas associates with faster metastatic dissemination to the brain. J Cell Mol Med 2020; 24:6916-6927. [PMID: 32390293 PMCID: PMC7299712 DOI: 10.1111/jcmm.15350] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 01/10/2020] [Accepted: 03/01/2020] [Indexed: 01/10/2023] Open
Abstract
Glioblastomas and brain metastases (BM) of solid tumours are the most common central nervous system neoplasms associated with very unfavourable prognosis. In this study, we report the association of prostate‐specific membrane antigen (PSMA) with various clinical parameters in a large cohort of primary and secondary brain tumours. A tissue microarray containing 371 cases of ascending grades of gliomas pertaining to astrocytic origin and samples of 52 cases of primary lung carcinomas with matching BM with follow‐up time accounting to 10.4 years was evaluated for PSMA expression using immunohistochemistry. In addition, PSMA expression was studied in BM arising from melanomas and breast carcinomas. Neovascular expression of PSMA was evident alongside with high expression in the proliferating microvasculature of glioblastomas when compared to the tumour cell expression. This result correlated with the results obtained from the in silico (cancer genome databases) analyses. In gliomas, only the vascular expression of PSMA associated with poor overall survival but not the tumour cell expression. In the matched primary lung cancers and their BM (n = 52), vascular PSMA expression in primary tumours associated with significantly accelerated metastatic dissemination to the brain with a tendency towards poor overall survival. Taken together, we report that the vascular expression of PSMA in the primary and secondary brain tumours globally associates with the malignant progression and poor outcome of the patients.
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Affiliation(s)
| | - Suvi Lehtipuro
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Harri Sihto
- Translational Cancer Medicine Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Clinicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - József Tóvári
- Department of Experimental Pharmacology, National Institute of Oncology, Budapest, Hungary
| | - Lilla Reiniger
- SE-NAP Brain Metastasis Research group, 2nd Department of Pathology, Semmelweis University, Budapest, Hungary.,1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Vanda Téglási
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Judit Moldvay
- SE-NAP Brain Metastasis Research group, 2nd Department of Pathology, Semmelweis University, Budapest, Hungary.,Department of Tumor Biology, National Korányi Institute of Pulmonology-Semmelweis University, Budapest, Hungary
| | - Matti Nykter
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.,Science Center, Tampere University Hospital, Tampere, Finland
| | - Hannu Haapasalo
- Department of Pathology, University of Tampere and Fimlab laboratories, Tampere, Finland
| | - Vadim Le Joncour
- Translational Cancer Medicine Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Pirjo Laakkonen
- Translational Cancer Medicine Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Laboratory Animal Centre, HiLIFE - Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
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Harsini S, Saprunoff H, Alden T, Mohammadi B, Wilson D, Bénard F. The Effects of Monosodium Glutamate on PSMA Radiotracer Uptake in Men with Recurrent Prostate Cancer: A Prospective, Randomized, Double-Blind, Placebo-Controlled Intraindividual Imaging Study. J Nucl Med 2020; 62:81-87. [DOI: 10.2967/jnumed.120.246983] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 04/13/2020] [Indexed: 02/06/2023] Open
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Li L, de Guadalupe Jaraquemada-Peláez M, Aluicio-Sarduy E, Wang X, Barnhart TE, Cai W, Radchenko V, Schaffer P, Engle JW, Orvig C. Coordination chemistry of [Y(pypa)] - and comparison immuno-PET imaging of [ 44Sc]Sc- and [ 86Y]Y-pypa-phenyl-TRC105. Dalton Trans 2020; 49:5547-5562. [PMID: 32270167 PMCID: PMC7222037 DOI: 10.1039/d0dt00437e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Both scandium-44 and yttrium-86 are popular PET isotopes with appropriate half-lives for immuno-positron emission tomography (immuno-PET) imaging. Herein, a new bifunctional H4pypa ligand, H4pypa-phenyl-NCS, is synthesized, conjugated to a monoclonal antibody, TRC105, and labeled with both radionuclides to investigate the long-term in vivo stability of each complex. While the 44Sc-labeled radiotracer exhibited promising pharmacokinetics and stability in 4T1-xenograft mice (n = 3) even upon prolonged interactions with blood serum proteins, the progressive bone uptake of the 86Y-counterpart indicated in vivo demetallation, obviating H4pypa as a suitable chelator for Y3+ ion in vivo. The solution chemistry of [natY(pypa)]- was studied in detail and the complex found to be thermodynamically stable in solution with a pM value 22.0, ≥3 units higher than those of the analogous DOTA- and CHX-A''-DTPA-complexes; the 86Y-result in vivo was therefore most unexpected. To explore further this in vivo lability, Density Functional Theory (DFT) calculation was performed to predict the geometry of [Y(pypa)]- and the results were compared with those for the analogous Sc- and Lu-complexes; all three adopted the same coordination geometry (i.e. distorted capped square antiprism), but the metal-ligand bonds were much longer in [Y(pypa)]- than in [Lu(pypa)]- and [Sc(pypa)]-, which could indicate that the size of the binding cavity is too small for the Y3+ ion, but suitable for both the Lu3+ and Sc3+ ions. Considered along with results from [86Y][Y(pypa-phenyl-TRC105)], it is noted that when matching chelators with radionuclides, chemical data such as the thermodynamic stability and in vitro inertness, albeit useful and necessary, do not always translate to in vivo inertness, especially with the prolonged blood circulation of the radiotracer bound to a monoclonal antibody. Although H4pypa is a nonadentate chelator, which theoretically matches the coordination number of the Y3+ ion, we show herein that its binding cavity, in fact, favors smaller metal ions such as Sc3+ and Lu3+ and further exploitation of the Sc-pypa combination is desired.
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Affiliation(s)
- Lily Li
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
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Combined Early and Late [ 68Ga]PSMA-HBED-CC PET Scans Improve Lesion Detectability in Biochemical Recurrence of Prostate Cancer with Low PSA Levels. Mol Imaging Biol 2020; 21:558-566. [PMID: 30105521 DOI: 10.1007/s11307-018-1263-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
PURPOSE Our aim was to evaluate the benefit of early (1 h post-injection (p.i.)) and late (3 h p.i.) [68Ga]PSMA-HBED-CC positron emission tomography (PET)/x-ray computed tomography (CT) imaging for detection of biochemical recurrence (BCR) of prostate cancer (PCa). PROCEDURES Seventy patients with BCR of the PCa and prostate-specific antigen (PSA) levels of less than 2.0 μg/l were subjected to [68Ga]PSMA-HBED-CC PET (mean injected activity 180 MBq). While early imaging contained whole body scans, late imaging was confined to the pelvis and the lower abdomen. Uptake in suspicious lesions was analyzed by peak and maximum standardized uptake values (SUVpeak/max). Tumor-to-background ratios were calculated for all lesions in which the liver served as reference organ. The Wilcoxon matched-pair signed-rank test was used to compare the uptake in suspicious lesions between early and late imaging. Follow-up data were used to validate the existence of the additionally detected lesions. RESULTS Forty-four of the 70 patients thus examined were interpreted as PSMA-positive in early and/or late scans while 26 remained without suspicion of PSMA tracer uptake. A total of 70 suspicious lesions were analyzed. Ten tumor-suspicious lesions from seven different patients were better or exclusively visible in the late measurements while three tumor-suspicious lesions from three different patients were better or exclusively visible in the early images. A validation by follow-up data was possible for 11 of these 13 additionally detected lesions. In direct comparison between early and late imaging, the mean SUVmax in PSMA-positive lesions was 74 % higher (p < 0.001) and the mean SUVpeak was 36 % higher (p = 0.001) in the late scans. The SUVmean in the reference regions was decreasing in the late measurements, whereas the mean TBR increased by a factor of 3 (p < 0.001). Taking confirmed lesions only into account, we estimated a 10 % gain in additionally detected PSMA-positive lesions (7/70) within the patient cohort. CONCLUSIONS The time period between injection and data acquisition influences the detection rate of [68Ga]PSMA-HBED-CC PET/CT. In biochemical recurrence with low PSA levels, late [68Ga]PSMA-HBED-CC PET/CT imaging offers frequent advantages with regard to lesion contrast.
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Kavand A, Anton N, Vandamme T, Serra CA, Chan-Seng D. Synthesis and functionalization of hyperbranched polymers for targeted drug delivery. J Control Release 2020; 321:285-311. [DOI: 10.1016/j.jconrel.2020.02.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/10/2020] [Accepted: 02/10/2020] [Indexed: 02/07/2023]
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71
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Czerwińska M, Bilewicz A, Kruszewski M, Wegierek-Ciuk A, Lankoff A. Targeted Radionuclide Therapy of Prostate Cancer-From Basic Research to Clinical Perspectives. Molecules 2020; 25:E1743. [PMID: 32290196 PMCID: PMC7181060 DOI: 10.3390/molecules25071743] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 03/23/2020] [Accepted: 04/07/2020] [Indexed: 12/18/2022] Open
Abstract
Prostate cancer is the most commonly diagnosed malignancy in men and the second leading cause of cancer-related deaths in Western civilization. Although localized prostate cancer can be treated effectively in different ways, almost all patients progress to the incurable metastatic castration-resistant prostate cancer. Due to the significant mortality and morbidity rate associated with the progression of this disease, there is an urgent need for new and targeted treatments. In this review, we summarize the recent advances in research on identification of prostate tissue-specific antigens for targeted therapy, generation of highly specific and selective molecules targeting these antigens, availability of therapeutic radionuclides for widespread medical applications, and recent achievements in the development of new-generation small-molecule inhibitors and antibody-based strategies for targeted prostate cancer therapy with alpha-, beta-, and Auger electron-emitting radionuclides.
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Affiliation(s)
- Malwina Czerwińska
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.C.); (M.K.)
| | - Aleksander Bilewicz
- Centre of Radiochemistry and Nuclear Chemistry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland;
| | - Marcin Kruszewski
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.C.); (M.K.)
- Department of Molecular Biology and Translational Research, Institute of Rural Health, Jaczewskiego 2, 20-090 Lublin, Poland
| | - Aneta Wegierek-Ciuk
- Department of Medical Biology, Institute of Biology, Jan Kochanowski University, Uniwersytecka 7, 24-406 Kielce, Poland;
| | - Anna Lankoff
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.C.); (M.K.)
- Department of Medical Biology, Institute of Biology, Jan Kochanowski University, Uniwersytecka 7, 24-406 Kielce, Poland;
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Vaughan HJ, Green JJ, Tzeng SY. Cancer-Targeting Nanoparticles for Combinatorial Nucleic Acid Delivery. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1901081. [PMID: 31222852 PMCID: PMC6923623 DOI: 10.1002/adma.201901081] [Citation(s) in RCA: 129] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/13/2019] [Indexed: 05/03/2023]
Abstract
Nucleic acids are a promising type of therapeutic for the treatment of a wide range of conditions, including cancer, but they also pose many delivery challenges. For efficient and safe delivery to cancer cells, nucleic acids must generally be packaged into a vehicle, such as a nanoparticle, that will allow them to be taken up by the target cells and then released in the appropriate cellular compartment to function. As with other types of therapeutics, delivery vehicles for nucleic acids must also be designed to avoid unwanted side effects; thus, the ability of such carriers to target their cargo to cancer cells is crucial. Classes of nucleic acids, hurdles that must be overcome for effective intracellular delivery, types of nonviral nanomaterials used as delivery vehicles, and the different strategies that can be employed to target nucleic acid delivery specifically to tumor cells are discussed. Additonally, nanoparticle designs that facilitate multiplexed delivery of combinations of nucleic acids are reviewed.
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Affiliation(s)
- Hannah J Vaughan
- Department of Biomedical Engineering, Translational Tissue Engineering Center and Institute for NanoBioTechnology, Johns Hopkins University School of Medicine, 400 North Broadway, Smith Building 5001, Baltimore, MD, 21231, USA
| | - Jordan J Green
- Department of Biomedical Engineering, Translational Tissue Engineering Center and Institute for NanoBioTechnology, Johns Hopkins University School of Medicine, 400 North Broadway, Smith Building 5001, Baltimore, MD, 21231, USA
| | - Stephany Y Tzeng
- Department of Biomedical Engineering, Translational Tissue Engineering Center and Institute for NanoBioTechnology, Johns Hopkins University School of Medicine, 400 North Broadway, Smith Building 5001, Baltimore, MD, 21231, USA
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Comparison of 68Ga-PSMA-11 PET/CT with 11C-acetate PET/CT in re-staging of prostate cancer relapse. Sci Rep 2020; 10:4993. [PMID: 32193430 PMCID: PMC7081247 DOI: 10.1038/s41598-020-61910-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 03/04/2020] [Indexed: 12/24/2022] Open
Abstract
Positron emission tomography (PET) imaging is used to localize recurrent disease in prostate cancer (PCa). The tracer 68Ga-PSMA-11 visualizes lesions overexpressing prostate-specific membrane antigen (PSMA), while 11C-acetate visualizes lesions with increased anabolic metabolism. The aim of this study was to compare the performance of PSMA-PET and acetate-PET in re-staging patients with biochemical relapse. Thirty PCa patients with prostate-specific antigen (PSA) relapse after primary curative therapy were prospectively evaluated. PET/CT examinations using 11C-acetate and 68Ga-PSMA-11 were performed. Identified lesions were categorized according to anatomical location and PET measurements were correlated with PSA at time of scan. Tumour lesions showed higher semi-quantitative uptake values on PSMA-PET than acetate-PET. PSMA-PET identified more lesions in 11 patients, fewer lesions in eight patients, and identical number of lesions in 11 patients. This study indicates better diagnostic performance of PSMA-PET, particularly in detecting lymph node (81% vs 60%, p = 0.02) and bone metastasis (95% vs 61%, p = 0.0001) compared to acetate-PET. However, 38% of PSMA-expressing metastases appear to be metabolically inactive and 15% of metabolically active metastases lack PSMA expression. Addition of PET with a metabolic tracer, such as 11C-acetate, might be beneficial before making treatment decisions.
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Potemkin R, Strauch B, Kuwert T, Prante O, Maschauer S. Development of 18F-Fluoroglycosylated PSMA-Ligands with Improved Renal Clearance Behavior. Mol Pharm 2020; 17:933-943. [DOI: 10.1021/acs.molpharmaceut.9b01179] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Roman Potemkin
- Department of Nuclear Medicine, Molecular Imaging and Radiochemistry, Friedrich-Alexander University (FAU), Schwabachanlage 12, 91054 Erlangen, Germany
| | - Brigitte Strauch
- Department of Nuclear Medicine, Molecular Imaging and Radiochemistry, Friedrich-Alexander University (FAU), Schwabachanlage 12, 91054 Erlangen, Germany
| | - Torsten Kuwert
- Department of Nuclear Medicine, Molecular Imaging and Radiochemistry, Friedrich-Alexander University (FAU), Schwabachanlage 12, 91054 Erlangen, Germany
| | - Olaf Prante
- Department of Nuclear Medicine, Molecular Imaging and Radiochemistry, Friedrich-Alexander University (FAU), Schwabachanlage 12, 91054 Erlangen, Germany
| | - Simone Maschauer
- Department of Nuclear Medicine, Molecular Imaging and Radiochemistry, Friedrich-Alexander University (FAU), Schwabachanlage 12, 91054 Erlangen, Germany
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75
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Synthesis and Evaluation of 99mTc-Tricabonyl Labeled Isonitrile Conjugates for Prostate-Specific Membrane Antigen (PSMA) Image. INORGANICS 2020. [DOI: 10.3390/inorganics8010005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Prostate-specific membrane antigen (PSMA) is a biomarker expressed on the surface of prostate cancer (PCa). In an effort to improve the detection and treatment of PCa, small urea-based PSMA inhibitors have been studied extensively. In the present study, we aimed to develop 99mTc-tricabonyl labeled urea-based PSMA conjugates containing isonitrile (CN-R)-coordinating ligands ([99mTc]Tc-15 and [99mTc]Tc-16). Both the PSMA conjugates were obtained at high radiochemical efficiency (≥98.5%). High in vitro binding affinity was observed for [99mTc]Tc-15 and [99mTc]Tc-16 (Kd = 5.5 and 0.2 nM, respectively) in PSMA-expressing 22Rv1 cells. Tumor xenografts were conducted using 22Rv1 cells and rapid accumulation of [99mTc]Tc-16 (1.87 ± 0.11% ID/g) was observed at 1 h post-injection, which subsequently increased to (2.83 ± 0.26% ID/g) at 4 h post-injection. However, [99mTc]Tc-15 showed moderate tumor uptake (1.48 ± 0.18% ID/g), which decreased at 4 h post-injection (0.81 ± 0.09% ID/g). [99mTc]Tc-16 was excreted from non-targeted tissues with high tumor-to-blood (17:1) and tumor-to-muscle ratio (41:1) at 4 h post-injection at approximately 4 times higher levels than [99mTc]Tc-15. Uptakes of [99mTc]Tc-15 and [99mTc]Tc-16 to PSMA-expressing tumor and tissues were significantly blocked by co-injection of 2-(Phosphonomethyl)-pentandioic acid (2-PMPA), suggesting that their uptakes are mediated by PSMA specifically. Whole-body single photon emission computed tomography imaging of [99mTc]Tc-16 verified the ex vivo biodistribution results and demonstrated clear visualization of tumors and tissues expressing PSMA compared to [99mTc]Tc-15. In conclusion, using [99mTc]Tc-16 rather than [99mTc]Tc-15 may be the preferable because of its relatively high tumor uptake and retention.
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Ermert J, Benešová M, Hugenberg V, Gupta V, Spahn I, Pietzsch HJ, Liolios C, Kopka K. Radiopharmaceutical Sciences. Clin Nucl Med 2020. [DOI: 10.1007/978-3-030-39457-8_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
Single photon emission computed tomography (SPECT) is the state-of-the-art imaging modality in nuclear medicine despite the fact that only a few new SPECT tracers have become available in the past 20 years. Critical for the future success of SPECT is the design of new and specific tracers for the detection, localization, and staging of a disease and for monitoring therapy. The utility of SPECT imaging to address oncologic questions is dependent on radiotracers that ideally exhibit excellent tissue penetration, high affinity to the tumor-associated target structure, specific uptake and retention in the malignant lesions, and rapid clearance from non-targeted tissues and organs. In general, a target-specific SPECT radiopharmaceutical can be divided into two main parts: a targeting biomolecule (e.g., peptide, antibody fragment) and a γ-radiation-emitting radionuclide (e.g., 99mTc, 123I). If radiometals are used as the radiation source, a bifunctional chelator is needed to link the radioisotope to the targeting entity. In a rational SPECT tracer design, these single components have to be critically evaluated in order to achieve a balance among the demands for adequate target binding, and a rapid clearance of the radiotracer. The focus of this chapter is to depict recent developments of tumor-targeted SPECT radiotracers for imaging of cancer diseases. Possibilities for optimization of tracer design and potential causes for design failure are discussed and highlighted with selected examples.
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78
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Ruigrok EAM, van Weerden WM, Nonnekens J, de Jong M. The Future of PSMA-Targeted Radionuclide Therapy: An Overview of Recent Preclinical Research. Pharmaceutics 2019; 11:E560. [PMID: 31671763 PMCID: PMC6921028 DOI: 10.3390/pharmaceutics11110560] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/23/2019] [Accepted: 10/24/2019] [Indexed: 12/15/2022] Open
Abstract
Prostate specific membrane antigen (PSMA) has become a major focus point in the research and development of prostate cancer (PCa) imaging and therapeutic strategies using radiolabeled tracers. PSMA has shown to be an excellent target for PCa theranostics because of its high expression on the membrane of PCa cells and the increase in expression during disease progression. Therefore, numerous PSMA-targeting tracers have been developed and (pre)clinically studied with promising results. However, many of these PSMA-targeting tracers show uptake in healthy organs such as the salivary glands, causing radiotoxicity. Furthermore, not all patients respond to PSMA-targeted radionuclide therapy (TRT). This created the necessity of additional preclinical research studies in which existing tracers are reevaluated and new tracers are developed in order to improve PSMA-TRT by protecting the (PSMA-expressing) healthy organs and improving tumor uptake. In this review we will give an overview of the recent preclinical research projects regarding PCa-TRT using PSMA-specific radiotracers, which will give an indication of where the PSMA-TRT research movement is going and what we can expect in future clinical trials.
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Affiliation(s)
- Eline A M Ruigrok
- Dept. of Radiology and Nuclear Medicine, Erasmus MC, 3015 GD Rotterdam, The Netherlands.
- Dept. of Experimental Urology, Erasmus MC, 3015 GD Rotterdam, The Netherlands.
| | | | - Julie Nonnekens
- Dept. of Radiology and Nuclear Medicine, Erasmus MC, 3015 GD Rotterdam, The Netherlands.
- Dept. of Molecular Genetics, Erasmus MC, 3015 GD Rotterdam, The Netherlands.
- Oncode Institute, Erasmus MC, 3015 GD Rotterdam, The Netherlands.
| | - Marion de Jong
- Dept. of Radiology and Nuclear Medicine, Erasmus MC, 3015 GD Rotterdam, The Netherlands.
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Zia NA, Cullinane C, Van Zuylekom JK, Waldeck K, McInnes LE, Buncic G, Haskali MB, Roselt PD, Hicks RJ, Donnelly PS. A Bivalent Inhibitor of Prostate Specific Membrane Antigen Radiolabeled with Copper‐64 with High Tumor Uptake and Retention. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nicholas A. Zia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Carleen Cullinane
- Sir Peter MacCallum Department of Oncology University of Melbourne Melbourne 3010 Vic. Australia
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | | | - Kelly Waldeck
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Lachlan E. McInnes
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Gojko Buncic
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Mohammad B. Haskali
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Peter D. Roselt
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Rodney J. Hicks
- Sir Peter MacCallum Department of Oncology University of Melbourne Melbourne 3010 Vic. Australia
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Paul S. Donnelly
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
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80
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Historical review of pharmacological development and dosimetry of PSMA-based theranostics for prostate cancer. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06800-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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81
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Carlos Dos Santos J, Beijer B, Bauder-Wüst U, Schäfer M, Leotta K, Eder M, Benešová M, Kleist C, Giesel F, Kratochwil C, Kopka K, Haberkorn U, Mier W. Development of Novel PSMA Ligands for Imaging and Therapy with Copper Isotopes. J Nucl Med 2019; 61:70-79. [PMID: 31541034 DOI: 10.2967/jnumed.119.229054] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 06/12/2019] [Indexed: 01/05/2023] Open
Abstract
Prostate-specific membrane antigen (PSMA)-binding tracers have been shown to be promising agents for the specific targeting of prostate tumors. On labeling with the short-lived isotopes 18F and 68Ga, excellent molecular imaging performance is achieved. This potential could be further exploited using long-lived isotopes. Because of the favorable half-life of 64Cu, tracers labeled with this PET nuclide could solve logistic problems. Moreover, this isotope provides a theranostic pair with the therapeutic copper isotope 67Cu. Hence, 9 novel tracers that combine dedicated copper chelators with the PSMA-specific urea-based binding motif were developed. Methods: The precursors were obtained by solid-phase synthesis. The purity and molecular weight of the PSMA ligands were confirmed by high-performance liquid chromatography and liquid chromatography-mass spectrometry. The compounds were labeled with 64Cu, with a radiolabeling yield of more than 99%. Competitive cell binding assays and internalization assays were performed with C4-2 cells, a subline of the PSMA-positive cell line LNCaP (human lymph node carcinoma of the prostate). In vitro serum stability, the stability of 64Cu-CA003 in blood, and the in vivo fate of neat 64Cu-chloride or 64Cu-CA003 were determined to prove whether the stability of the radiolabeled compounds is sufficient to ensure no significant loss of copper during the targeting process. For PET imaging and biodistribution studies, a C4-2 tumor-bearing mouse model was used. Results: The radiolabeled 64Cu-PSMA ligands showed high serum stability. All PSMA ligands showed high inhibition potencies, with equilibrium inhibition constants in the low nanomolar range. 64Cu-CA003 and 64Cu-CA005 showed high internalization ratios (34.6% ± 2.8 and 18.6% ± 4.4, respectively). Both the in vitro serum stability determination and the in vivo characterization of the main radiolabeled compounds confirmed that, except for 64Cu-PSMA-617, all compounds showed high serum stability within the observation period of 24 h. Small-animal PET imaging demonstrated high tumor uptake within 20 min. Organ distribution studies confirmed high specific uptake in the tumor, with 30.8 ± 12.6 percentage injected dose (%ID)/g at 1 h after injection. Rapid clearance from the kidneys was observed-a decrease from 67.0 ± 20.9 %ID/g at 1 h after injection to 7.5 ± 8.51 %ID/g at 24 h after injection (in the case of CA003). The performance of CA003, the compound with the best preclinical properties, was assessed in a first patient. In line with its preclinical data, PET imaging resulted in clear visualization of the cancer lesions, with high contrast. Conclusion: The 64Cu-labeled PSMA ligands are promising agents to target PSMA and visualize PSMA-positive tumor lesions as shown in preclinical evaluation by small-animal PET studies, organ distribution, and a patient application. Most importantly, the images obtained at 20 h enabled delineation of unclear lesions, showing that the compounds fulfill the prerequisite for dosimetry in the course of therapy planning with 67Cu. Thus, we suggest clinical use of copper-labeled CA003 for diagnostics and radiotherapy of prostate cancer.
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Affiliation(s)
| | - Barbro Beijer
- Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany
| | - Ulrike Bauder-Wüst
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, Heidelberg, Germany
| | - Martin Schäfer
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, Heidelberg, Germany
| | - Karin Leotta
- Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany
| | - Matthias Eder
- Division of Radiopharmaceutical Development, German Cancer Consortium Freiburg, Department of Nuclear Medicine, University of Freiburg, Freiburg, Germany; and
| | - Martina Benešová
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, Heidelberg, Germany
| | - Christian Kleist
- Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany
| | - Frederik Giesel
- Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany
| | - Clemens Kratochwil
- Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany
| | - Klaus Kopka
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center, Heidelberg, Germany
| | - Uwe Haberkorn
- Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany.,Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center, Heidelberg, Germany
| | - Walter Mier
- Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany
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Derks YH, Löwik DWPM, Sedelaar JPM, Gotthardt M, Boerman OC, Rijpkema M, Lütje S, Heskamp S. PSMA-targeting agents for radio- and fluorescence-guided prostate cancer surgery. Am J Cancer Res 2019; 9:6824-6839. [PMID: 31660071 PMCID: PMC6815946 DOI: 10.7150/thno.36739] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 07/16/2019] [Indexed: 11/15/2022] Open
Abstract
Despite recent improvements in imaging and therapy, prostate cancer (PCa) still causes substantial morbidity and mortality. In surgical treatment, incomplete resection of PCa and understaging of possible undetected metastases may lead to disease recurrence and consequently poor patient outcome. To increase the chance of accurate staging and subsequently complete removal of all cancerous tissue, prostate specific membrane antigen (PSMA) targeting agents may provide the surgeon an aid for the intraoperative detection and resection of PCa lesions. Two modalities suitable for this purpose are radionuclide detection, which allows sensitive intraoperative localization of tumor lesions with a gamma probe, and fluorescence imaging, allowing tumor visualization and delineation. Next to fluorescence, use of photosensitizers may enable intraoperative targeted photodynamic therapy to eradicate remaining tumor lesions. Since radiodetection and optical imaging techniques each have their own strengths and weaknesses, a combination of both modalities could be of additional value. Here, we provide an overview of recent preclinical and clinical advances in PSMA-targeted radio- and fluorescence-guided surgery of PCa.
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83
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Zia NA, Cullinane C, Van Zuylekom JK, Waldeck K, McInnes LE, Buncic G, Haskali MB, Roselt PD, Hicks RJ, Donnelly PS. A Bivalent Inhibitor of Prostate Specific Membrane Antigen Radiolabeled with Copper‐64 with High Tumor Uptake and Retention. Angew Chem Int Ed Engl 2019; 58:14991-14994. [DOI: 10.1002/anie.201908964] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Nicholas A. Zia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Carleen Cullinane
- Sir Peter MacCallum Department of Oncology University of Melbourne Melbourne 3010 Vic. Australia
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | | | - Kelly Waldeck
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Lachlan E. McInnes
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Gojko Buncic
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Mohammad B. Haskali
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Peter D. Roselt
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Rodney J. Hicks
- Sir Peter MacCallum Department of Oncology University of Melbourne Melbourne 3010 Vic. Australia
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Paul S. Donnelly
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
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84
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Israel O, Pellet O, Biassoni L, De Palma D, Estrada-Lobato E, Gnanasegaran G, Kuwert T, la Fougère C, Mariani G, Massalha S, Paez D, Giammarile F. Two decades of SPECT/CT - the coming of age of a technology: An updated review of literature evidence. Eur J Nucl Med Mol Imaging 2019; 46:1990-2012. [PMID: 31273437 PMCID: PMC6667427 DOI: 10.1007/s00259-019-04404-6] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 06/14/2019] [Indexed: 02/08/2023]
Abstract
PURPOSE Single-photon emission computed tomography (SPECT) combined with computed tomography (CT) was introduced as a hybrid SPECT/CT imaging modality two decades ago. The main advantage of SPECT/CT is the increased specificity achieved through a more precise localization and characterization of functional findings. The improved diagnostic accuracy is also associated with greater diagnostic confidence and better inter-specialty communication. METHODS This review presents a critical assessment of the relevant literature published so far on the role of SPECT/CT in a variety of clinical conditions. It also includes an update on the established evidence demonstrating both the advantages and limitations of this modality. CONCLUSIONS For the majority of applications, SPECT/CT should be a routine imaging technique, fully integrated into the clinical decision-making process, including oncology, endocrinology, orthopaedics, paediatrics, and cardiology. Large-scale prospective studies are lacking, however, on the use of SPECT/CT in certain clinical domains such as neurology and lung disorders. The review also presents data on the complementary role of SPECT/CT with other imaging modalities and a comparative analysis, where available.
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Affiliation(s)
- Ora Israel
- Rappaport School of Medicine, Israel Institute of Technology, Haifa, Israel.
| | - O Pellet
- Nuclear Medicine and Diagnostic Imaging Section International Atomic Energy Agency, Vienna, Austria
| | - L Biassoni
- Department of Radiology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - D De Palma
- Nuclear Medicine Unit, Circolo Hospital, ASST-Settelaghi, Varese, Italy
| | - E Estrada-Lobato
- Nuclear Medicine and Diagnostic Imaging Section International Atomic Energy Agency, Vienna, Austria
| | - G Gnanasegaran
- Department of Nuclear Medicine, Royal Free NHS Foundation Trust, London, UK
| | - T Kuwert
- Clinic of Nuclear Medicine, University Hospital, Erlangen, Germany
| | - C la Fougère
- Division of Nuclear Medicine and Clinical Molecular Imaging, Department of Radiology, University Hospital, Tubingen, Germany
| | - G Mariani
- Regional Center of Nuclear Medicine, University of Pisa, Pisa, Italy
| | - S Massalha
- Department of Medicine, University of Ottawa Heart Institute, Ottawa, Canada
- Department of Nuclear Medicine, Rambam Healthcare Campus, Haifa, Israel
| | - D Paez
- Nuclear Medicine and Diagnostic Imaging Section International Atomic Energy Agency, Vienna, Austria
| | - F Giammarile
- Nuclear Medicine and Diagnostic Imaging Section International Atomic Energy Agency, Vienna, Austria
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85
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Ahmadzadehfar H, Rahbar K, Essler M, Biersack HJ. PSMA-Based Theranostics: A Step-by-Step Practical Approach to Diagnosis and Therapy for mCRPC Patients. Semin Nucl Med 2019; 50:98-109. [PMID: 31843065 DOI: 10.1053/j.semnuclmed.2019.07.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
To date, several papers have been published about prostate-specific membrane antigen (PSMA)-based radioligand diagnostic and therapeutic approaches. This paper mainly provides information for nuclear medicine physicians that are clinically engaged in the diagnosis and treatment of prostate cancer patients. It aims to present the utility of PSMA imaging and therapy in a step-by-step practical approach; thus, it does not discuss radiochemistry and the molecular basics of PSMA.
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Affiliation(s)
| | - Kambiz Rahbar
- Department of Nuclear Medicine, University Hospital Munster, Bonn, Germany
| | - Markus Essler
- Department of Nuclear Medicine, University Hospital Bonn, Bonn, Germany
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86
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Wang S, Blaha C, Santos R, Huynh T, Hayes TR, Beckford-Vera DR, Blecha JE, Hong AS, Fogarty M, Hope TA, Raleigh DR, Wilson DM, Evans MJ, VanBrocklin HF, Ozawa T, Flavell RR. Synthesis and Initial Biological Evaluation of Boron-Containing Prostate-Specific Membrane Antigen Ligands for Treatment of Prostate Cancer Using Boron Neutron Capture Therapy. Mol Pharm 2019; 16:3831-3841. [PMID: 31381351 DOI: 10.1021/acs.molpharmaceut.9b00464] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Boron neutron capture therapy (BNCT) is a therapeutic modality which has been used for the treatment of cancers, including brain and head and neck tumors. For effective treatment via BNCT, efficient and selective delivery of a high boron dose to cancer cells is needed. Prostate-specific membrane antigen (PSMA) is a target for prostate cancer imaging and drug delivery. In this study, we conjugated boronic acid or carborane functional groups to a well-established PSMA inhibitor scaffold to deliver boron to prostate cancer cells and prostate tumor xenograft models. Eight boron-containing PSMA inhibitors were synthesized. All of these compounds showed a strong binding affinity to PSMA in a competition radioligand binding assay (IC50 from 555.7 to 20.3 nM). Three selected compounds 1a, 1d, and 1f were administered to mice, and their in vivo blocking of 68Ga-PSMA-11 uptake was demonstrated through a positron emission tomography (PET) imaging and biodistribution experiment. Biodistribution analysis demonstrated boron uptake of 4-7 μg/g in 22Rv1 prostate xenograft tumors and similar tumor/muscle ratios compared to the ratio for the most commonly used BNCT compound, 4-borono-l-phenylalanine (BPA). Taken together, these data suggest a potential role for PSMA targeted BNCT agents in prostate cancer therapy following suitable optimization.
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Affiliation(s)
- Sinan Wang
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States
| | - Charles Blaha
- Department of Bioengineering and Therapeutic Sciences , University of California , San Francisco , California , United States
| | - Raquel Santos
- Department of Neurological Surgery , University of California , San Francisco , California , United States
| | - Tony Huynh
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States
| | - Thomas R Hayes
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States
| | - Denis R Beckford-Vera
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States
| | - Joseph E Blecha
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States
| | - Andrew S Hong
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States
| | - Miko Fogarty
- Department of Neurological Surgery , University of California , San Francisco , California , United States
| | - Thomas A Hope
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States
| | - David R Raleigh
- Department of Neurological Surgery , University of California , San Francisco , California , United States.,Departments of Radiation Oncology , University of California , San Francisco , California , United States
| | - David M Wilson
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States
| | - Michael J Evans
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States
| | - Henry F VanBrocklin
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States
| | - Tomoko Ozawa
- Department of Neurological Surgery , University of California , San Francisco , California , United States
| | - Robert R Flavell
- Department of Radiology and Biomedical Imaging , University of California , San Francisco , California , United States.,Department of Pharmaceutical Chemistry , University of California , San Francisco , California , United States
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87
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Assadi M, Dadgar H. Quality control and GMP synthesis of 68Ga-prostate-specific membrane antigen-11 for detection of low- and high-grade prostate cancer. World J Nucl Med 2019; 19:93-98. [PMID: 32939194 PMCID: PMC7478300 DOI: 10.4103/wjnm.wjnm_82_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 10/11/2018] [Indexed: 11/04/2022] Open
Abstract
Prostate-specific membrane antigen (PSMA) labeled with 68Ga routinely used with higher sensibility and specificity than other radiotracers for detection of low and high grades of prostate cancer using positron emission tomography (PET)-computed tomography. 68Ge/68Ga generators are generally used with automated modules for the syntheses of 68Ga radiopharmaceuticals. The aim of the current study is to describe the procedures for labeling PSMA with radiotracers and their standard QC tests. The automated synthesis method for 68Ga-PSMA-11 was taken and set of a quality control based on chromatographic and spectrometric methods used to determine radiochemical and radionuclide purity of the radiolabeled compound. Meanwhile, high-performance liquid chromatography and rainbow trail Lutheran camp are the best choices after stability tests for assessment of radiochemical purity at the optimized conditions. The clinical utility of the synthesized radiopharmaceuticals was ascertained by performing PET scans in human patients.
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Affiliation(s)
- Majid Assadi
- The Persian Gulf Nuclear Medicine Research Center, Bushehr University of Medical Sciences,Bushehr, Iran.,Department of Molecular Imaging and Radionuclide Therapy, Bushehr Medical University Hospital, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Habibollah Dadgar
- Cancer Research Center, Razavi Hospital, Imam Reza International University, Mashhad, Iran
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88
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Navya PN, Kaphle A, Srinivas SP, Bhargava SK, Rotello VM, Daima HK. Current trends and challenges in cancer management and therapy using designer nanomaterials. NANO CONVERGENCE 2019; 6:23. [PMID: 31304563 PMCID: PMC6626766 DOI: 10.1186/s40580-019-0193-2] [Citation(s) in RCA: 344] [Impact Index Per Article: 68.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 06/17/2019] [Indexed: 05/06/2023]
Abstract
Nanotechnology has the potential to circumvent several drawbacks of conventional therapeutic formulations. In fact, significant strides have been made towards the application of engineered nanomaterials for the treatment of cancer with high specificity, sensitivity and efficacy. Tailor-made nanomaterials functionalized with specific ligands can target cancer cells in a predictable manner and deliver encapsulated payloads effectively. Moreover, nanomaterials can also be designed for increased drug loading, improved half-life in the body, controlled release, and selective distribution by modifying their composition, size, morphology, and surface chemistry. To date, polymeric nanomaterials, metallic nanoparticles, carbon-based materials, liposomes, and dendrimers have been developed as smart drug delivery systems for cancer treatment, demonstrating enhanced pharmacokinetic and pharmacodynamic profiles over conventional formulations due to their nanoscale size and unique physicochemical characteristics. The data present in the literature suggest that nanotechnology will provide next-generation platforms for cancer management and anticancer therapy. Therefore, in this critical review, we summarize a range of nanomaterials which are currently being employed for anticancer therapies and discuss the fundamental role of their physicochemical properties in cancer management. We further elaborate on the topical progress made to date toward nanomaterial engineering for cancer therapy, including current strategies for drug targeting and release for efficient cancer administration. We also discuss issues of nanotoxicity, which is an often-neglected feature of nanotechnology. Finally, we attempt to summarize the current challenges in nanotherapeutics and provide an outlook on the future of this important field.
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Affiliation(s)
- P N Navya
- Nano-Bio Interfacial Research Laboratory (NBIRL), Department of Biotechnology, Siddaganga Institute of Technology, Tumkur, Karnataka, 572103, India.
- Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Erode, Tamil Nadu, 638401, India.
| | - Anubhav Kaphle
- Melbourne Integrative Genomics, School of BioSciences/School of Mathematics and Statistics, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - S P Srinivas
- School of Optometry, Indiana University, Bloomington, Indiana, 47405, USA
| | - Suresh Kumar Bhargava
- Centre for Advanced Materials and Industrial Chemistry, School of Science, RMIT University, Melbourne, VIC, 3001, Australia
| | - Vincent M Rotello
- Department of Chemistry, University of Massachusetts (UMass) Amherst, 710 North Pleasant Street, Amherst, MA, 01003, USA
| | - Hemant Kumar Daima
- Nano-Bio Interfacial Research Laboratory (NBIRL), Department of Biotechnology, Siddaganga Institute of Technology, Tumkur, Karnataka, 572103, India.
- Centre for Advanced Materials and Industrial Chemistry, School of Science, RMIT University, Melbourne, VIC, 3001, Australia.
- Amity Institute of Biotechnology, Amity University Rajasthan, Kant Kalwar, NH-11C, Jaipur-Delhi Highway, Jaipur, Rajasthan, 303002, India.
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89
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Rosecker V, Denk C, Maurer M, Wilkovitsch M, Mairinger S, Wanek T, Mikula H. Cross-Isotopic Bioorthogonal Tools as Molecular Twins for Radiotheranostic Applications. Chembiochem 2019; 20:1530-1535. [PMID: 30742739 PMCID: PMC6617999 DOI: 10.1002/cbic.201900042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Indexed: 11/08/2022]
Abstract
Radiotheranostics are designed by labeling targeting (bio)molecules with radionuclides for diagnostic or therapeutic application. Because the pharmacokinetics of therapeutic compounds play a pivotal role, chemically closely related imaging agents are used to evaluate the overall feasibility of the therapeutic approach. "Theranostic relatives" that utilize different elements are frequently used in clinical practice. However, variations in pharmacokinetics, biodistribution, and target affinity due to different chemical properties of the radioisotopes remain as hurdles to the design of optimized clinical tools. Herein, the design and synthesis of structurally identical compounds, either for diagnostic (18 F and a stable metal isotope) or therapeutic application (radiometal and stable 19 F), are reported. Such "molecular twins" have been prepared by applying a modular strategy based on click chemistry that enables efficient radiolabeling of compounds containing a metal complex and a tetrazine moiety. This additional bioorthogonal functionality can be used for subsequent radiolabeling of (bio)molecules or pretargeting approaches, which is demonstrated in vitro.
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Affiliation(s)
- Veronika Rosecker
- Institute of Applied Synthetic ChemistryTU Wien (Vienna University of Technology)Getreidemarkt 91060ViennaAustria
| | - Christoph Denk
- Institute of Applied Synthetic ChemistryTU Wien (Vienna University of Technology)Getreidemarkt 91060ViennaAustria
| | - Melanie Maurer
- Institute of Applied Synthetic ChemistryTU Wien (Vienna University of Technology)Getreidemarkt 91060ViennaAustria
| | - Martin Wilkovitsch
- Institute of Applied Synthetic ChemistryTU Wien (Vienna University of Technology)Getreidemarkt 91060ViennaAustria
| | - Severin Mairinger
- Preclinical Molecular ImagingAIT Austrian Institute of Technology2444SeibersdorfAustria
| | - Thomas Wanek
- Preclinical Molecular ImagingAIT Austrian Institute of Technology2444SeibersdorfAustria
| | - Hannes Mikula
- Institute of Applied Synthetic ChemistryTU Wien (Vienna University of Technology)Getreidemarkt 91060ViennaAustria
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90
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Li L, Jaraquemada-Peláez MDG, Kuo HT, Merkens H, Choudhary N, Gitschtaler K, Jermilova U, Colpo N, Uribe-Munoz C, Radchenko V, Schaffer P, Lin KS, Bénard F, Orvig C. Functionally Versatile and Highly Stable Chelator for 111In and 177Lu: Proof-of-Principle Prostate-Specific Membrane Antigen Targeting. Bioconjug Chem 2019; 30:1539-1553. [PMID: 31009566 DOI: 10.1021/acs.bioconjchem.9b00225] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Here, we present the synthesis and characterization of a new potentially nonadentate chelator H4pypa and its bifunctional analogue tBu4pypa-C7-NHS conjugated to prostate-specific membrane antigen (PSMA)-targeting peptidomimetic (Glu-urea-Lys). H4pypa is very functionally versatile and biologically stable. Compared to the conventional chelators (e.g., DOTA, DTPA), H4pypa has outstanding affinities for both 111In (EC, t1/2 ≈ 2.8 days) and 177Lu (β-,γ, t1/2 ≈ 6.64 days). Its radiolabeled complexes were achieved at >98% radiochemical yield, RT within 10 min, at a ligand concentration as low as 10-6 M, with excellent stability in human serum over at least 5-7 days (<1% transchelation). The thermodynamic stabilities of the [M(pypa)]- complexes (M3+ = In3+, Lu3+, La3+) were dependent on the ionic radii, where the smaller In3+ has the highest pM value (30.5), followed by Lu3+ (22.6) and La3+ (19.9). All pM values are remarkably higher than those with DOTA, DTPA, H4octapa, H4octox, and H4neunpa. Moreover, the facile and versatile bifunctionalization enabled by the p-OH group in the central pyridyl bridge of the pypa scaffold (compound 14) allows incorporation of a variety of linkers for bioconjugation through easy nucleophilic substitution. In this work, an alkyl linker was selected to couple H4pypa to a PSMA-targeting pharmacophore, proving that the bioconjugation sacrifices neither the tumor-targeting nor the chelation properties. The biodistribution profiles of 111In- and 177Lu-labeled tracers are different, but promising, with the 177Lu analogue particularly outstanding.
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Affiliation(s)
- Lily Li
- Life Sciences Division , TRIUMF , 4004 Wesbrook Mall , Vancouver , British Columbia V6T 2A3 , Canada
| | | | - Hsiou-Ting Kuo
- Department of Molecular Oncology , BC Cancer , 675 West 10th Avenue , Vancouver , British Columbia V5Z 1L3 , Canada
| | - Helen Merkens
- Department of Molecular Oncology , BC Cancer , 675 West 10th Avenue , Vancouver , British Columbia V5Z 1L3 , Canada
| | - Neha Choudhary
- Life Sciences Division , TRIUMF , 4004 Wesbrook Mall , Vancouver , British Columbia V6T 2A3 , Canada
| | - Katrin Gitschtaler
- Department of Molecular Oncology , BC Cancer , 675 West 10th Avenue , Vancouver , British Columbia V5Z 1L3 , Canada
| | | | - Nadine Colpo
- Department of Molecular Oncology , BC Cancer , 675 West 10th Avenue , Vancouver , British Columbia V5Z 1L3 , Canada
| | - Carlos Uribe-Munoz
- Department of Molecular Oncology , BC Cancer , 675 West 10th Avenue , Vancouver , British Columbia V5Z 1L3 , Canada
| | - Valery Radchenko
- Life Sciences Division , TRIUMF , 4004 Wesbrook Mall , Vancouver , British Columbia V6T 2A3 , Canada
| | - Paul Schaffer
- Life Sciences Division , TRIUMF , 4004 Wesbrook Mall , Vancouver , British Columbia V6T 2A3 , Canada
| | - Kuo-Shyan Lin
- Department of Molecular Oncology , BC Cancer , 675 West 10th Avenue , Vancouver , British Columbia V5Z 1L3 , Canada
| | - François Bénard
- Department of Molecular Oncology , BC Cancer , 675 West 10th Avenue , Vancouver , British Columbia V5Z 1L3 , Canada
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91
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Diao W, Cai H, Chen L, Jin X, Liao X, Jia Z. Recent Advances in Prostate-Specific Membrane Antigen-Based Radiopharmaceuticals. Curr Top Med Chem 2019; 19:33-56. [PMID: 30706785 DOI: 10.2174/1568026619666190201100739] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 12/13/2018] [Accepted: 12/15/2018] [Indexed: 02/05/2023]
Abstract
BACKGROUND Prostate cancer (PCa) is the most common sex-related malignancy with high mortality in men worldwide. Prostate-specific membrane antigen (PSMA) is overexpressed on the surface of most prostate tumor cells and considered a valuable target for both diagnosis and therapy of prostate cancer. A series of radiolabeled agents have been developed based on the featured PSMA ligands in the previous decade and have demonstrated promising outcomes in clinical research of primary and recurrent PCa. Furthermore, the inspiring response and safety of lutetium-177-PSMA-617 (177Lu-PSMA-617) radiotherapy represent the potential for expanded therapeutic options for metastatic castration-resistant PCa. Retrospective cohort studies have revealed that radiolabeled PSMA agents are the mainstays of the current success, especially in detecting prostate cancer with metastasis and biochemical recurrence. OBJECTIVE This review is intended to present a comprehensive overview of the current literature on PSMA ligand-based agents for both radionuclide imaging and therapeutic approaches, with a focus on those that have been clinically adopted. CONCLUSION PSMA-based diagnosis and therapy hold great promise for improving the clinical management of prostate cancer.
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Affiliation(s)
- Wei Diao
- Department of Nuclear Medicine, West China Hospital, Sichuan University, 610041, Chengdu, China
| | - Huawei Cai
- Department of Nuclear Medicine, West China Hospital, Sichuan University, 610041, Chengdu, China
| | - Lihong Chen
- Department of Biochemistry & Molecular Biology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, China
| | - Xi Jin
- Institute of Urology, Department of Urology, West China Hospital, Sichuan University, 610041, Chengdu, China
| | - Xinyang Liao
- Institute of Urology, Department of Urology, West China Hospital, Sichuan University, 610041, Chengdu, China
| | - Zhiyun Jia
- Department of Nuclear Medicine, West China Hospital, Sichuan University, 610041, Chengdu, China
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92
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Sengupta S, Asha Krishnan M, Chattopadhyay S, Chelvam V. Comparison of prostate-specific membrane antigen ligands in clinical translation research for diagnosis of prostate cancer. Cancer Rep (Hoboken) 2019; 2:e1169. [PMID: 32721116 DOI: 10.1002/cnr2.1169] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/28/2019] [Accepted: 02/07/2019] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Prostate-specific membrane antigen (PSMA), overexpressed on prostate cancer (PCa), is a well-characterized cell surface protein to selectively diagnose PCa. PSMA's unique characteristics and its 1000-fold higher expression in PCa compared with other tissues renders it as a suitable biomarker for detection of PCa in its early stage. In this report, we critically analyze and recommend the requirements needed for the development of variety of PSMA-targeted molecular imaging agents based on antibodies, small molecule ligands, peptides, and aptamers. The targeting moieties are either conjugated to radionuclear isotopes or near-infrared agents for efficient diagnosis of PCa. RECENT FINDINGS From the analysis, it was found that several small molecule-derived PCa imaging agents are approved for clinical trials in Europe and the United States, and few are already in the clinical use for diagnosis of PCa. Even though 111In-labeled capromab pendetide was approved by the Food and Drug Administration (FDA) and other engineered antibodies are available for detection of PCa, but high production cost, low shelf life (less than 1 month at 4°C), possibility of human immuno reactions, and low blood clearance rate necessitated a need for developing new imaging agents, which are serum stable, cost-effective, and possesses longer shelf life (6 months), have fast clearance rate from nontargeted tissues during the diagnosis process. It is found that small molecule ligand-derived imaging agents possesses most of the desired properties expected for an ideal diagnostic agent when compared with other targeting moieties. CONCLUSION This report discusses in detail the homing moieties used in the development of targeted diagnostic tools for detection of PCa. The merits and demerits of monoclonal antibodies, small molecule ligands, peptides, and aptamers for imaging of PCa and intraoperative guided surgery are extensively analyzed. Among all, urea-based ligands were found to be most successful in preclinical and clinical trials and show a major promise for future commercialization.
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Affiliation(s)
- Sagnik Sengupta
- Discipline of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Mena Asha Krishnan
- Discipline of Biosciences and Biomedical Engineering, School of Engineering, Indian Institute of Technology Indore, Indore, India
| | - Sudeshna Chattopadhyay
- Discipline of Biosciences and Biomedical Engineering, School of Engineering, Indian Institute of Technology Indore, Indore, India.,Discipline of Physics, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India.,Discipline of Metallurgy Engineering and Material Science, School of Engineering, Indian Institute of Technology Indore, Indore, India
| | - Venkatesh Chelvam
- Discipline of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India.,Discipline of Biosciences and Biomedical Engineering, School of Engineering, Indian Institute of Technology Indore, Indore, India
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93
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Tan H, Liu X, Su J, Wang Y, Gu X, Yang D, Waclawik ER, Zhu H, Zheng Z. One-pot selective synthesis of azoxy compounds and imines via the photoredox reaction of nitroaromatic compounds and amines in water. Sci Rep 2019; 9:1280. [PMID: 30718720 PMCID: PMC6361970 DOI: 10.1038/s41598-018-38100-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 10/23/2018] [Indexed: 12/04/2022] Open
Abstract
A facile one-pot two-stage photochemical synthesis of aromatic azoxy compounds and imines has been developed by coupling the selective reduction of nitroaromatic compounds with the selective oxidation of amines in an aqueous solution. In the first stage (light illumination, Ar atmosphere), the light excited nitroaromatic molecule abstract H from amine to form ArNO2H and amine radical, which then form nitrosoaromatic, hydroxylamine and imine compounds. Water acts as a green solvent for the dispersion of the reactants and facilitates the formation of nitrosoaromatic and hydroxylamine intermediate compounds. In the second stage (no light, air atmosphere), the condensation of nitrosoaromatic and hydroxylamine compounds yields aromatic azoxy product with the aid of molecular oxygen in air. This photochemical synthesis achieved both high conversion and high product selectivity (>99%) at room temperature.
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Affiliation(s)
- Hao Tan
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China.,University of Chinese Academy of Sciences (UCAS), Beijing, 100049, China
| | - XingChen Liu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
| | - JiHu Su
- Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China
| | - YingXiong Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
| | - XianMo Gu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China.
| | - DongJiang Yang
- School of Environmental Science and Engineering, Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao, 266071, China
| | - Eric R Waclawik
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - HuaiYong Zhu
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - ZhanFeng Zheng
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China.
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94
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Theranostics for Advanced Prostate Cancer: Current Indications and Future Developments. Eur Urol Oncol 2019; 2:152-162. [PMID: 31017091 DOI: 10.1016/j.euo.2019.01.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 12/24/2018] [Accepted: 01/07/2019] [Indexed: 12/13/2022]
Abstract
CONTEXT Advanced prostate cancer (PCa) is a prominent cause of cancer death in men; positron emission tomography (PET) imaging may play a relevant role in detecting metastases and thus allowing a more tailored therapy in these patients. Radioligand therapy (RLT) may also gain relevance as a treatment strategy in advanced disease. OBJECTIVE The aim of this review is to highlight how the recently developed theranostic processes may become a part of both the available diagnostic and the therapy arsenal in advanced PCa patients. EVIDENCE ACQUISITION An expert panel of nuclear medicine physicians and a urologist, highly experienced in the fields of radionuclide imaging and RLT in advanced PCa, performed a nonsystematic review of the current indications, performance, limitations, and potential future developments of the currently available options in PCa theranostics. EVIDENCE SYNTHESIS Among PET radiotracers, prostate-specific membrane antigen (PSMA)-based compounds in advanced PCa are the focus of a continuously growing interest, mostly due to their potential relevance as theranostic agents. The impact of PSMA-based PET/computed tomography imaging on treatment strategies and prognosis is promising, but still not unquestionably clear. Potential applications may include a role as a gatekeeper to PSMA-directed RLT, as well as monitoring the spread of systemic disease. Currently, initial results seem to substantiate the role of PSMA-directed RLT in terms of feasibility and efficacy. CONCLUSIONS PSMA is a promising molecule for both imaging and therapy in advanced PCa patients; nevertheless, further studies are needed to investigate its role and to determine the impact of its side effects and its overall strategy outcome. PATIENT SUMMARY Prostate-specific membrane antigen (PSMA), a protein, is highly expressed on prostate cancer cells. The possibility to perform diagnostic imaging and subsequently administer therapies by the means of the same molecule is called "theranostics". In patients with advanced prostate cancer, PSMA might have a role in detecting disease spread through both positron emission tomography and single-photon emission computed tomography imaging, while treating prostate cancer systemic localizations with radioligand therapy. Further studies are needed to better determine patients' risks and benefits of these therapeutic approaches.
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95
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Beheshti M, Heinzel A, von Mallek D, Filss C, Mottaghy FM. Prostate-specific membrane antigen radioligand therapy of prostate cancer. THE QUARTERLY JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING : OFFICIAL PUBLICATION OF THE ITALIAN ASSOCIATION OF NUCLEAR MEDICINE (AIMN) [AND] THE INTERNATIONAL ASSOCIATION OF RADIOPHARMACOLOGY (IAR), [AND] SECTION OF THE SOCIETY OF RADIOPHARMACEUTICAL CHEMISTRY AND BIOLOGY 2019; 63:29-36. [PMID: 30644306 DOI: 10.23736/s1824-4785.19.03155-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Defining an optimal therapeutic approach in metastatic castration-resistance prostate cancer (mCRPC) patients in advanced stages is still challenging in routine clinical practice. Prostate-specific membrane antigen (PSMA) targeted radionuclide therapy with β- or α-emitters such as 177-Lutethium (177Lu) or 225-Actinium (225A) has been a main focus at multiple academic research centers in the last few years. This review article provides an overview of PSMA characteristics, clinical performance, safety and toxicity of PSMA targeted β- or α-radiation therapy.
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Affiliation(s)
- Mohsen Beheshti
- Department of Nuclear Medicine, University Hospital, RWTH University, Aachen, Germany - .,Department of Nuclear Medicine and Endocrinology, Paracelsus Medical University, Salzburg, Austria -
| | - Alexander Heinzel
- Department of Nuclear Medicine, University Hospital, RWTH University, Aachen, Germany
| | - Dirk von Mallek
- Department of Nuclear Medicine, University Hospital, RWTH University, Aachen, Germany
| | - Christian Filss
- Department of Nuclear Medicine, University Hospital, RWTH University, Aachen, Germany
| | - Felix M Mottaghy
- Department of Nuclear Medicine, University Hospital, RWTH University, Aachen, Germany.,Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
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96
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Moghul M, Somani B, Lane T, Vasdev N, Chaplin B, Peedell C, KandaSwamy GV, Rai BP. Detection rates of recurrent prostate cancer: 68Gallium (Ga)-labelled prostate-specific membrane antigen versus choline PET/CT scans. A systematic review. Ther Adv Urol 2019; 11:1756287218815793. [PMID: 30671137 PMCID: PMC6329022 DOI: 10.1177/1756287218815793] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 11/06/2018] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND The aim of this work was to assess the use of prostate-specific membrane antigen (PSMA)-labelled radiotracers in detecting the recurrence of prostate cancer. PSMA is thought to have higher detection rates when utilized in positron emission tomography (PET)/computed tomography (CT) scans, particularly at lower prostate-specific antigen (PSA) levels, compared with choline-based scans. METHODS A systematic review was conducted comparing choline and PSMA PET/CT scans in patients with recurrent prostate cancer following an initial curative attempt. The primary outcomes were overall detection rates, detection rates at low PSA thresholds, difference in detection rates and exclusive detection rates on a per-person analysis. Secondary outcome measures were total number of lesions, exclusive detection by each scan on a per-lesion basis and adverse side effects. RESULTS Overall detection rates were 79.8% for PSMA and 66.7% for choline. There was a statistically significant difference in detection rates favouring PSMA [OR (M-H, random, 95% confidence interval (CI)) 2.27 (1.06, 4.85), p = 0.04]. Direct comparison was limited to PSA < 2 ng/ml in two studies, with no statistically significant difference in detection rates between the scans [OR (M-H, random, 95% CI) 2.37 (0.61, 9.17) p = 0.21]. The difference in detection on the per-patient analysis was significantly higher in the PSMA scans (p < 0.00001). All three studies reported higher lymph node, bone metastasis and locoregional recurrence rates in PSMA. CONCLUSIONS PSMA PET/CT has a better performance compared with choline PET/CT in detecting recurrent disease both on per-patient and per-lesion analysis and should be the imaging modality of choice while deciding on salvage and nonsystematic metastasis-directed therapy strategies.
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Affiliation(s)
- Masood Moghul
- Barts Health NHS Trust, Department of Urology, The Royal London Hospital, London, UK
| | - Bhaskar Somani
- University Hospital Southampton NHS Trust, Southampton, UK
| | - Tim Lane
- Hertfordshire and South Bedfordshire Urological Cancer Centre, Department of Urology, Lister Hospital, Stevenage, UK
| | - Nikhil Vasdev
- Hertfordshire and South Bedfordshire Urological Cancer Centre, Department of Urology, Lister Hospital, Stevenage, UK
| | - Brian Chaplin
- NHS Foundation Trust, Consultant Urological Surgeon, South Tees Hospitals NHS Foundation Trust, UK
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97
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Cimadamore A, Cheng M, Santoni M, Lopez-Beltran A, Battelli N, Massari F, Galosi AB, Scarpelli M, Montironi R. New Prostate Cancer Targets for Diagnosis, Imaging, and Therapy: Focus on Prostate-Specific Membrane Antigen. Front Oncol 2018; 8:653. [PMID: 30622933 PMCID: PMC6308151 DOI: 10.3389/fonc.2018.00653] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 12/10/2018] [Indexed: 12/12/2022] Open
Abstract
The rising incidence rate of the cancer in the prostate gland has increased the demand for improved diagnostic, imaging, and therapeutic approaches. Prostate-specific membrane antigen (PSMA), with folate hydrolase and carboxypeptidase and, internalization activities, is highly expressed in the epithelial cells of the prostate gland and is strongly upregulated in prostatic adenocarcinoma, with elevated expression correlating with, metastasis, progression, and androgen independence. Recently, PSMA has been an active target of investigation by several approaches, including the successful utilization of small molecule inhibitors, RNA aptamer conjugates, PSMA-based immunotherapy, and PSMA-targeted prodrug therapy. Future investigations of PSMA in prostate cancer (PCa) should focus in particular on its intracellular activities and functions. The objective of this contribution is to review the current role of PSMA as a marker for PCa diagnosis, imaging, and therapy.
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Affiliation(s)
- Alessia Cimadamore
- Section of Pathological Anatomy, School of Medicine, United Hospitals, Polytechnic University of the Marche Region, Ancona, Italy
| | - Monica Cheng
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, United States
| | | | | | | | | | - Andrea B Galosi
- Institute of Urology, School of Medicine, United Hospitals, Marche Polytechnic University, Ancona, Italy
| | - Marina Scarpelli
- Section of Pathological Anatomy, School of Medicine, United Hospitals, Polytechnic University of the Marche Region, Ancona, Italy
| | - Rodolfo Montironi
- Section of Pathological Anatomy, School of Medicine, United Hospitals, Polytechnic University of the Marche Region, Ancona, Italy
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98
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Rahbar K, Afshar-Oromieh A, Jadvar H, Ahmadzadehfar H. PSMA Theranostics: Current Status and Future Directions. Mol Imaging 2018; 17:1536012118776068. [PMID: 29873291 PMCID: PMC5992796 DOI: 10.1177/1536012118776068] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Prostate-specific membrane antigen (PSMA) is a promising target for imaging diagnostics and targeted radionuclide therapy (theranostics) of prostate cancer and its metastases. There is increasing evidence of encouraging response rates and a low toxicity profile of radioligand therapy (RLT) of metastatic castration-resistant prostate cancer using 177Lu-labeled PSMA ligands. In this article, we review the current status of diagnostics and therapy using radiolabeled PSMA ligands. We also suggest protocols for patient selection criteria and conduct of PSMA-based RLT. Challenges and opportunities of PSMA theranostics are discussed.
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Affiliation(s)
- Kambiz Rahbar
- 1 Department of Nuclear Medicine, University Hospital Muenster, Muenster, Germany
| | | | - Hossein Jadvar
- 3 Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
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99
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Wirtz M, Schmidt A, Schottelius M, Robu S, Günther T, Schwaiger M, Wester HJ. Synthesis and in vitro and in vivo evaluation of urea-based PSMA inhibitors with increased lipophilicity. EJNMMI Res 2018; 8:84. [PMID: 30136051 PMCID: PMC6104465 DOI: 10.1186/s13550-018-0440-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/14/2018] [Indexed: 11/13/2022] Open
Abstract
Background Several radiolabeled prostate-specific membrane antigen (PSMA) inhibitors based on the lysine-urea-glutamate (KuE) motif as the pharmacophore proved to be suitable tools for PET/SPECT imaging of the PSMA expression in prostate cancer patients. PSMA I&T, a theranostic tracer developed in our group, was optimized through alteration of the peptidic structure in order to increase the affinity to PSMA and internalization in PSMA-expressing tumor cells. However, further structural modifications held promise to improve the pharmacokinetic profile. Results Among the investigated compounds 1–9, the PSMA inhibitors 5 and 6 showed the highest PSMA affinity (lowest IC50 values) after the introduction of a naphthylalanine modification. The affinity was up to three times higher compared to the reference PSMA I&T. Extended aromatic systems such as the biphenylalanine residue in 4 impaired the interaction with the lipophilic binding pocket of PSMA, resulting in a tenfold lower affinity. The IC50 of DOTAGA-conjugated 10 was slightly increased compared to the acetylated analog; however, efficient PSMA-mediated internalization and 80% plasma protein binding of 68Ga-10 resulted in effective tumor targeting and low uptake in non-target tissues of LNCaP tumor-bearing CD-1 nu/nu mice at 1 h p.i., as determined by small-animal PET imaging and biodistribution studies. For prolonged tumor retention, the plasma protein binding was increased by insertion of 4-iodo-d-phenylalanine resulting in 97% plasma protein binding and 16.1 ± 2.5% ID/g tumor uptake of 177Lu-11 at 24 h p.i. Conclusions Higher lipophilicity of the novel PSMA ligands 10 and 11 proved to be beneficial in terms of affinity and internalization and resulted in higher tumor uptake compared to the parent compound. Additional combination with para-iodo-phenylalanine in the spacer of ligand 11 elevated the plasma protein binding and enabled sustained tumor accumulation over 24 h, increasing the tumor uptake almost fourfold compared to 177Lu-PSMA I&T. However, high renal uptake remains a drawback and further studies are necessary to elucidate the responsible mechanism behind it. Electronic supplementary material The online version of this article (10.1186/s13550-018-0440-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Martina Wirtz
- Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
| | - Alexander Schmidt
- Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany.
| | - Margret Schottelius
- Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
| | - Stephanie Robu
- Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
| | - Thomas Günther
- Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
| | - Markus Schwaiger
- Department of Nuclear Medicine, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Hans-Jürgen Wester
- Pharmaceutical Radiochemistry, Technische Universität München, Garching, Germany
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100
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Wang Z, Tian R, Niu G, Ma Y, Lang L, Szajek LP, Kiesewetter DO, Jacobson O, Chen X. Single Low-Dose Injection of Evans Blue Modified PSMA-617 Radioligand Therapy Eliminates Prostate-Specific Membrane Antigen Positive Tumors. Bioconjug Chem 2018; 29:3213-3221. [DOI: 10.1021/acs.bioconjchem.8b00556] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Zhantong Wang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, United States
| | - Rui Tian
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, United States
| | - Gang Niu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, United States
| | - Ying Ma
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, United States
| | - Lixin Lang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, United States
| | - Lawrence P. Szajek
- Positron Emission Tomography Department, Warren Grant Magnuson Clinical Center, National Institutes of Health, Bethesda, Maryland, United States
| | - Dale O. Kiesewetter
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, United States
| | - Orit Jacobson
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, United States
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, United States
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