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PSMA Expression in Solid Tumors beyond the Prostate Gland: Ready for Theranostic Applications? J Clin Med 2022; 11:jcm11216590. [PMID: 36362824 PMCID: PMC9657217 DOI: 10.3390/jcm11216590] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/02/2022] [Accepted: 11/04/2022] [Indexed: 11/09/2022] Open
Abstract
In the past decades, the expanding use of prostate-specific membrane antigen (PSMA) imaging for prostate cancer has led to the incidental detection of a lot of extra-prostatic malignancies showing an increased uptake of PSMA. Due to these incidental findings, the increasing amount of immunohistochemistry studies and the deeper knowledge of the mechanisms of expression of this antigen, it is now clear that “PSMA” is a misnomer, since it is not specific to the prostate gland. Nevertheless, this lack of specificity could represent an interesting opportunity to bring new insights on the biology of PSMA and its sites of expression to image and treat new conditions, particularly several cancers. In this review, we will describe the main extra-prostatic cancers that exhibit PSMA expression and that can be studied with PSMA-based positron emission tomography–computed tomography (PET/CT) as an additional or alternative tool to conventional imaging. In particular, we will focus on cancers in which a radioligand therapy with 177lutetium has been attempted, aiming to provide an overview of the possible future theragnostic applications of PSMA.
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2
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Jeitner TM, Babich JW, Kelly JM. Advances in PSMA theranostics. Transl Oncol 2022; 22:101450. [PMID: 35597190 PMCID: PMC9123266 DOI: 10.1016/j.tranon.2022.101450] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 05/04/2022] [Accepted: 05/08/2022] [Indexed: 12/15/2022] Open
Abstract
PSMA is an appealing target for theranostic because it is a transmembrane protein with a known substrate that is overexpessed on prostate cancer cells and internalizes upon ligand binding. There are a number of PSMA theranostic ligands in clinical evaluation, clinical trial, or clinically approved. PSMA theranostic ligands increase progression-free survival, overall survival, and pain in patients with metastatic castration resistant prostate cancer. A major obstacle to PSMA-targeted radioligand therapy is off-target toxicity in salivary glands.
The validation of prostate specific membrane antigen (PSMA) as a molecular target in metastatic castration-resistant prostate cancer has stimulated the development of multiple classes of theranostic ligands that specifically target PSMA. Theranostic ligands are used to image disease or selectively deliver cytotoxic radioactivity to cells expressing PSMA according to the radioisotope conjugated to the ligand. PSMA theranostics is a rapidly advancing field that is now integrating into clinical management of prostate cancer patients. In this review we summarize published research describing the biological role(s) and activity of PSMA, highlight the most clinically advanced PSMA targeting molecules and biomacromolecules, and identify next generation PSMA ligands that aim to further improve treatment efficacy. The goal of this review is to provide a comprehensive assessment of the current state-of-play and a roadmap to achieving further advances in PSMA theranostics.
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Affiliation(s)
- Thomas M Jeitner
- Molecular Imaging Innovations Institute, Department of Radiology, Weill Cornell Medicine, Belfer Research Building, 413 East 69th Street, Room BB-1604, New York, NY 10021, USA
| | - John W Babich
- Molecular Imaging Innovations Institute, Department of Radiology, Weill Cornell Medicine, Belfer Research Building, 413 East 69th Street, Room BB-1604, New York, NY 10021, USA; Weill Cornell Medicine, Sandra and Edward Meyer Cancer Center, New York, NY 10021, USA; Weill Cornell Medicine, Citigroup Biomedical Imaging Center, New York, NY 10021, USA
| | - James M Kelly
- Molecular Imaging Innovations Institute, Department of Radiology, Weill Cornell Medicine, Belfer Research Building, 413 East 69th Street, Room BB-1604, New York, NY 10021, USA; Weill Cornell Medicine, Citigroup Biomedical Imaging Center, New York, NY 10021, USA.
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3
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Li Y, Zhang K, Yang F, Jiao D, Li M, Zhao X, Xu C, Liu S, Li H, Shi S, Yang B, Yang L, Han D, Wen W, Qin W. Prognostic Value of Vascular-Expressed PSMA and CD248 in Urothelial Carcinoma of the Bladder. Front Oncol 2021; 11:771036. [PMID: 34869004 PMCID: PMC8635966 DOI: 10.3389/fonc.2021.771036] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 10/27/2021] [Indexed: 11/22/2022] Open
Abstract
Background Urothelial carcinoma of the bladder (UCB) is a common cancer of the urinary system. Despite substantial improvements in available treatment options, the survival outcome of patients with advanced UCB is unsatisfactory. Therefore, it is necessary to identify new prognostic biomarkers for monitoring and therapy guidance of UCB. In recent years, prostate-specific membrane antigen (PSMA) and CD248 have been identified promising candidate bio7markers. Methods In this study, we first examined PSMA and CD248 expression in tissues from 124 patients with UCB using immunohistochemical and immunofluorescent staining. We then analyzed the association between the expression of the two biomarkers and other clinicopathological features and prognosis. Finally, we performed bioinformatic analysis of CD248 and FOLH 1 (PSMA) using the TCGA-BLCA dataset to explore the underlying mechanism of PSMA and CD248 in the progression of UCB. Results Among the 124 cases, PSMA and CD248 were confirmed to be expressed in tumor-associated vessels. Vascular PSMA and CD248 expression levels were associated significantly with several deteriorated clinicopathological features. Furthermore, using univariate and multivariate Cox analyses, high vascular PSMA and CD248 expression levels were observed to be associated significantly with poor prognosis in patients with UCB. As risk factors, both PSMA and CD248 expression showed good performance to predict prognosis. Furthermore, combining these vascular molecules with other clinical risk factors generated a risk score that could promote predictive performance. Bioinformatic analysis showed that both PSMA and CD248 might contribute to angiogenesis and promote further progression of UCB. Conclusion Both PSMA and CD248 are specifically expressed in the tumor-associated vasculature of UCB. These two molecules might be used as novel prognostic biomarkers and vascular therapeutic targets for UCB.
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Affiliation(s)
- Yu Li
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Keying Zhang
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Fa Yang
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Dian Jiao
- Department of Urology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Mingyang Li
- Department of Pathology, Fourth Military Medical University, Xi'an, China
| | - Xiaolong Zhao
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Chao Xu
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Shaojie Liu
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Hongji Li
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Shengjia Shi
- Assisted Reproduction Center, Northwest Women's and Children's Hospital, Xi'an, China
| | - Bo Yang
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Lijun Yang
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Donghui Han
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Weihong Wen
- Institute of Medical Research, Northwestern Polytechnical University, Xi'an, China
| | - Weijun Qin
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
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4
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Cuda TJ, Riddell AD, Liu C, Whitehall VL, Borowsky J, Wyld DK, Burge ME, Ahern E, Griffin A, Lyons NJR, Rose SE, Clark DA, Stevenson ARL, Hooper JD, Puttick S, Thomas PA. PET Imaging Quantifying 68Ga-PSMA-11 Uptake in Metastatic Colorectal Cancer. J Nucl Med 2020; 61:1576-1579. [PMID: 32358088 DOI: 10.2967/jnumed.119.233312] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 03/09/2020] [Indexed: 11/16/2022] Open
Abstract
At diagnosis, 22% of colorectal cancer (CRC) patients have metastases, and 50% later develop metastasis. Peptide receptor radionuclide therapy (PRRT), such as 177Lu-PSMA-617, is used to treat metastatic prostate cancer. 177Lu-PSMA-617 targets prostate-specific membrane antigen (PSMA), a cell-surface protein enriched in prostate cancer and the neovasculature of other solid tumors, including CRC. We performed 68Ga-PSMA-11 PET/CT imaging of 10 patients with metastatic CRC to assess metastasis avidity. Eight patients had lesions lacking avidity, and 2 had solitary metastases exhibiting very low avidity. Despite expression of PSMA in CRC neovasculature, none of the patients exhibited tumor avidity sufficient to be considered for 177Lu-PSMA-617 PRRT.
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Affiliation(s)
- Tahleesa J Cuda
- University of Queensland, Brisbane, Australia.,Metro North Hospital and Health Service, Brisbane, Australia
| | - Andrew D Riddell
- University of Queensland, Brisbane, Australia.,Metro North Hospital and Health Service, Brisbane, Australia
| | - Cheng Liu
- University of Queensland, Brisbane, Australia.,Envoi Specialist Pathologists, Herston, Australia.,QIMR Berghofer Medical Research Institute, Herston, Australia
| | - Vicki L Whitehall
- University of Queensland, Brisbane, Australia.,QIMR Berghofer Medical Research Institute, Herston, Australia
| | - Jennifer Borowsky
- University of Queensland, Brisbane, Australia.,Metro North Hospital and Health Service, Brisbane, Australia.,QIMR Berghofer Medical Research Institute, Herston, Australia
| | - David K Wyld
- University of Queensland, Brisbane, Australia.,Metro North Hospital and Health Service, Brisbane, Australia
| | - Matthew E Burge
- University of Queensland, Brisbane, Australia.,Metro North Hospital and Health Service, Brisbane, Australia
| | - Elizabeth Ahern
- University of Queensland, Brisbane, Australia.,Metro North Hospital and Health Service, Brisbane, Australia.,QIMR Berghofer Medical Research Institute, Herston, Australia
| | - Alison Griffin
- QIMR Berghofer Medical Research Institute, Herston, Australia
| | - Nicholas J R Lyons
- University of Queensland, Brisbane, Australia.,Metro North Hospital and Health Service, Brisbane, Australia
| | | | - David A Clark
- University of Queensland, Brisbane, Australia.,Metro North Hospital and Health Service, Brisbane, Australia
| | - Andrew R L Stevenson
- University of Queensland, Brisbane, Australia.,Metro North Hospital and Health Service, Brisbane, Australia
| | | | | | - Paul A Thomas
- University of Queensland, Brisbane, Australia .,Metro North Hospital and Health Service, Brisbane, Australia.,Herston Imaging Research Facility, Herston, Australia
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5
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Van de Wiele C, Sathekge M, de Spiegeleer B, De Jonghe PJ, Debruyne PR, Borms M, Beels L, Maes A. PSMA expression on neovasculature of solid tumors. Histol Histopathol 2020; 35:919-927. [PMID: 32282924 DOI: 10.14670/hh-18-215] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The use of prostate specific membrane antigen (PSMA) binding agents, labelled with diagnostic and therapeutic radio-isotopes is opening the potential for a new era of personalized management of prostate carcinoma. A wide variety of immunohistochemistry studies have shown PSMA also to be upregulated on the endothelial cells of the neovasculature of a wide variety of other solid tumors where it may facilitate endothelial cell sprouting and invasion through its regulation of lytic proteases that have the ability to cleave the extracellular matrix. Similar to the introduction of PSMA-targeting theranostics in prostate carcinoma, overexpression of PSMA on newly formed tumor vessels may serve as a target for imaging and subsequent treatment of cancer through the use of agents that are capable of blocking PSMA in its function or through PSMA-mediated delivery of chemotherapeutics or radiation agents. In this review, the available data on PSMA expression on tumor neovasculature in human solid tumors assessed by using immunohistochemistry are discussed.
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Affiliation(s)
- Christophe Van de Wiele
- Department of Nuclear Medicine, AZ Groeninge, Kortrijk, Belgium.,Department of Nuclear Medicine and Radiology, Ghent University, Ghent, Belgium.
| | - Mike Sathekge
- Department of Nuclear Medicine, University of Pretoria, Pretoria, South-Africa
| | - Bart de Spiegeleer
- Laboratory of Drug Quality and Registration, Ghent University, Ghent, Belgium
| | | | - Philip R Debruyne
- Department of Radiotherapy and Medical Oncology, AZ Groeninge, Kortrijk, Belgium
| | - Marleen Borms
- Department of Radiotherapy and Medical Oncology, AZ Groeninge, Kortrijk, Belgium
| | - Laurence Beels
- Department of Nuclear Medicine, AZ Groeninge, Kortrijk, Belgium.,Department of Imaging and Pathology @ KULAK, KU Leuven campus Kulak, Kortrijk, Belgium
| | - Alex Maes
- Department of Nuclear Medicine, AZ Groeninge, Kortrijk, Belgium.,Department of Imaging and Pathology @ KULAK, KU Leuven campus Kulak, Kortrijk, Belgium
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6
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Farag M, Bolton D, Lawrentschuk N. Prostate-specific membrane antigen for the surgical oncologist: interpreting expression beyond the prostate. ANZ J Surg 2019; 90:715-718. [PMID: 31617674 DOI: 10.1111/ans.15479] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 08/27/2019] [Accepted: 09/11/2019] [Indexed: 11/27/2022]
Abstract
The use of prostate-specific membrane antigen (PSMA) radiotracer in positron emission tomography (PET) has been successfully incorporated into the clinical management of prostate cancer. However, PSMA tracer uptake is not limited to prostate cancer tissue. We reviewed studies exploring PSMA expression beyond the prostate gland using techniques of 68 Ga-PSMA PET imaging and immunohistochemistry. PSMA expression has been associated with a variety of solid tumours, and the vasculature associated with neoplastic disease, suggesting that this trans-membrane glycoprotein may be involved in the neovascularisation process in malignancy. These studies demonstrate the need for more research into the potential utility for 68 Ga-PSMA PET imaging in patients with non-prostatic cancers.
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Affiliation(s)
- Matthew Farag
- Department of Surgery, The University of Melbourne, Melbourne, Victoria, Australia.,Department of Urology, Austin Health, Melbourne, Victoria, Australia
| | - Damien Bolton
- Department of Surgery, The University of Melbourne, Melbourne, Victoria, Australia.,Department of Urology, Austin Health, Melbourne, Victoria, Australia
| | - Nathan Lawrentschuk
- Department of Surgery, The University of Melbourne, Melbourne, Victoria, Australia.,Department of Urology, Austin Health, Melbourne, Victoria, Australia
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7
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Prostate-specific Membrane Antigen (PSMA) Expression in the Neovasculature of Gynecologic Malignancies: Implications for PSMA-targeted Therapy. Appl Immunohistochem Mol Morphol 2019; 25:271-276. [PMID: 26862945 DOI: 10.1097/pai.0000000000000297] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The goal of the study was to examine expression of prostate-specific membrane antigen (PSMA) in neovasculature of gynecologic cancers, as PSMA-targeted therapy has showed a promise in treatment of advanced carcinomas. The study included cervical carcinoma (n=28), vulvar carcinoma (n=20), endometrial carcinoma (n=23), primary ovarian carcinoma (n=21), metastatic ovarian carcinoma (n=25), and normal cervix (n=12) as negative control. All cases were immunostained using anti-CD31 antibody to delineate capillary endothelial cells. In parallel, all cases were immunostained using anti-PSMA antibody. The PSMA staining was assessed in tumor capillaries and in normal tissues and scored as a percentage of CD31 staining. PSMA expression was found in the tumor neovasculature, and no significant expression was identified in vasculature of normal tissues. The extent of PSMA staining in tumor capillaries varied from high expression in ovarian and endometrial cancers, to medium expression in cervical squamous cell carcinomas, and low expression in cervical adenocarcinomas and vulvar cancers. All (100%) cases of primary ovarian carcinoma, ovarian carcinoma metastases, and primary endometrial carcinoma showed PSMA expression in tumor vasculature, which was diffuse in majority of cases. The expression of PSMA in ovarian cancer metastases was similar among different metastatic foci of the same tumor. Fifteen percent of cervical squamous cell carcinoma, 50% of cervical adenocarcinoma, and 75% of vulvar carcinomas showed no capillary expression of PSMA. In conclusion, PSMA is highly and specifically expressed in the neovasculature of ovarian, endometrial, and cervical squamous carcinoma, rendering it a potential therapeutic vascular target.
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8
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Jiao D, Li Y, Yang F, Han D, Wu J, Shi S, Tian F, Guo Z, Xi W, Li G, Zhao A, Yang AG, Qin W, Wang H, Wen W. Expression of Prostate-Specific Membrane Antigen in Tumor-Associated Vasculature Predicts Poor Prognosis in Hepatocellular Carcinoma. Clin Transl Gastroenterol 2019; 10:1-7. [PMID: 31116141 PMCID: PMC6602770 DOI: 10.14309/ctg.0000000000000041] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 03/12/2019] [Indexed: 12/14/2022] Open
Abstract
INTRODUCTION Prostate-specific membrane antigen (PSMA) was originally found to be specifically expressed in normal prostate, and its expression was upregulated in almost all stages of prostate cancer. In recent years, PSMA was also found to be expressed in tumor-associated vasculature in many nonprostatic solid tumors. However, the expression pattern of PSMA in hepatocellular carcinoma (HCC) is not well studied. METHODS In this study, we examined PSMA expression in 103 HCC tissues using immunohistochemical staining and analyzed the association between PSMA expression and other clinicopathological features and prognosis. RESULTS Among the 103 cases, 27 cases (26%) showed PSMA expression in more than 50% of tumor-associated vasculature, 49 cases (48%) showed PSMA expression in less than 50% of vasculature, and 27 cases (26%) did not have detectable PSMA expression. Vascular PSMA expression was associated with several clinicopathological features, such as tumor stage, tumor differentiation, lymph node metastasis, and Ki-67 index. Furthermore, high vascular PSMA expression was also associated with poor prognosis in patients with HCC. Univariate and multivariate analyses showed that high vascular PSMA expression can be used as an independent prognostic marker for HCC. DISCUSSION Our study provides the evidence that PSMA is specifically expressed in tumor-associated vasculature of HCC, and vascular PSMA expression may be used as a novel prognostic marker and a vascular therapeutic target for HCC.
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MESH Headings
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Antigens, Surface/analysis
- Antigens, Surface/metabolism
- Antineoplastic Agents/pharmacology
- Antineoplastic Agents/therapeutic use
- Biomarkers, Tumor/analysis
- Biomarkers, Tumor/antagonists & inhibitors
- Biomarkers, Tumor/metabolism
- Carcinoma, Hepatocellular/blood supply
- Carcinoma, Hepatocellular/mortality
- Carcinoma, Hepatocellular/pathology
- Carcinoma, Hepatocellular/therapy
- Female
- Follow-Up Studies
- Glutamate Carboxypeptidase II/analysis
- Glutamate Carboxypeptidase II/antagonists & inhibitors
- Glutamate Carboxypeptidase II/metabolism
- Hepatectomy
- Humans
- Immunohistochemistry
- Kaplan-Meier Estimate
- Liver/blood supply
- Liver/pathology
- Liver/surgery
- Liver Neoplasms/blood supply
- Liver Neoplasms/mortality
- Liver Neoplasms/pathology
- Liver Neoplasms/therapy
- Lymphatic Metastasis/pathology
- Male
- Middle Aged
- Neoplasm Staging
- Neovascularization, Pathologic/mortality
- Neovascularization, Pathologic/pathology
- Neovascularization, Pathologic/therapy
- Prognosis
- Time Factors
- Young Adult
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Affiliation(s)
- Dian Jiao
- Department of Urology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Yu Li
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Fa Yang
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Donghui Han
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Jieheng Wu
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Shengjia Shi
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Feng Tian
- Department of Urology, the Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Zhangyan Guo
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Wenjin Xi
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
| | | | | | - An-Gang Yang
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Weijun Qin
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - He Wang
- Department of Urology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Weihong Wen
- State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an, China
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Abstract
We present a case of a diverticulum of the sigmoid colon with intense prostate-specific membrane antigen (PSMA) activity on Ga-PSMA PET/CT. CT scan and colonoscopy showed no signs of inflammation or malignancy. This case presents an addition to the collection of benign pitfalls when reporting PSMA PET/CT; however, a Ga-PSMA up-taking focus in the colon should always cause further examination, as malignant etiology must be ruled out.
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10
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Salas Fragomeni RA, Amir T, Sheikhbahaei S, Harvey SC, Javadi MS, Solnes LB, Kiess AP, Allaf ME, Pomper MG, Gorin MA, Rowe SP. Imaging of Nonprostate Cancers Using PSMA-Targeted Radiotracers: Rationale, Current State of the Field, and a Call to Arms. J Nucl Med 2018; 59:871-877. [PMID: 29545375 DOI: 10.2967/jnumed.117.203570] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 02/23/2018] [Indexed: 11/16/2022] Open
Abstract
Prostate-specific membrane antigen (PSMA) is a type II transmembrane glycoprotein that is highly overexpressed on prostate cancer epithelial cells and for which there is a growing body of literature examining the role of small-molecule and antibody radiotracers targeted against this protein for prostate cancer detection and therapy. Despite its name, PSMA is also expressed, to varying degrees, in the neovasculature of a wide variety of nonprostate cancers; indeed, the pathology literature is replete with promising immunohistochemistry findings. Several groups have begun to correlate those pathology-level results with in vivo imaging and therapy in nonprostate cancers using the same PSMA-targeted agents that have been so successful in prostate cancer. The potential to leverage radiotracers targeted to PSMA beyond prostate cancer is a promising approach for many cancers, and PSMA-targeted agents may be able to supplement or fill gaps left by other agents. However, to date, most of the reported findings with PSMA-targeted radiotracers in nonprostate malignancies have been in case reports and small case series, and the field must adopt a more thorough approach to the design and execution of larger prospective trials to realize the potential of these promising agents outside prostate cancer.
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Affiliation(s)
- Roberto A Salas Fragomeni
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Tali Amir
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Sara Sheikhbahaei
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Susan C Harvey
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Mehrbod S Javadi
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Lilja B Solnes
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ana P Kiess
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland; and
| | - Mohamad E Allaf
- James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Martin G Pomper
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland.,James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Michael A Gorin
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland.,James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Steven P Rowe
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland .,James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
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11
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Backhaus P, Noto B, Avramovic N, Grubert LS, Huss S, Bögemann M, Stegger L, Weckesser M, Schäfers M, Rahbar K. Targeting PSMA by radioligands in non-prostate disease—current status and future perspectives. Eur J Nucl Med Mol Imaging 2018; 45:860-877. [DOI: 10.1007/s00259-017-3922-y] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 12/25/2017] [Indexed: 12/11/2022]
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12
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64Cu-PSMA-617: A novel PSMA-targeted radio-tracer for PET imaging in gastric adenocarcinoma xenografted mice model. Oncotarget 2017; 8:74159-74169. [PMID: 29088775 PMCID: PMC5650330 DOI: 10.18632/oncotarget.18276] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 05/14/2017] [Indexed: 01/01/2023] Open
Abstract
Here, we report that it's feasible for imaging gastric adenocarcinoma mice model with prostate-specific membrane antigen (PSMA) targeting imaging agents, which could potentially provide an alternate and readily translational tool for managing gastric adenocarcinoma. DKFZ-PSMA-617, a PSMA targeting ligand reported recently, was chosen to be radio-labeled with nuclide 64Cu. 64Cu-PSMA-617 was radio-synthesized in high radio-chemical yield and specific activity up to 19.3 GBq/µmol. It showed good stability in vitro. The specificity of 64Cu-PSMA-617 was confirmed by cell uptake experiments in PSMA (+) LNCaP cell and PSMA (-) PC-3 and gastric adenocarcinoma BGC-823 cells. Micro-PET imaging in BGC-823 and PC-3 xenografts nude mice was evaluated (n = 4). And the tumors were visualized and better tumor-to-background achieved till 24 h. Co-administration of N- [[[(1S)-1-Carboxy-3-methylbutyl]amino]-carbonyl]-L-glutamic acid (ZJ-43) can substantially block the uptake in those tumors. Dissected tumor tissues were analyzed by auto-radiography and immunohistochemistry, and these results confirmed the PSMA expression in neo-vasculature which explained the target molecular imaging of 64Cu-PSMA-617. All those results suggested 64Cu-PSMA-617 may serve as a novel radio-tracer for tumor imaging more than prostate cancer.
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13
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Evans JC, Malhotra M, Cryan JF, O'Driscoll CM. The therapeutic and diagnostic potential of the prostate specific membrane antigen/glutamate carboxypeptidase II (PSMA/GCPII) in cancer and neurological disease. Br J Pharmacol 2016; 173:3041-3079. [PMID: 27526115 PMCID: PMC5056232 DOI: 10.1111/bph.13576] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 07/08/2016] [Accepted: 07/25/2016] [Indexed: 12/11/2022] Open
Abstract
Prostate specific membrane antigen (PSMA) otherwise known as glutamate carboxypeptidase II (GCPII) is a membrane bound protein that is highly expressed in prostate cancer and in the neovasculature of a wide variety of tumours including glioblastomas, breast and bladder cancers. This protein is also involved in a variety of neurological diseases including schizophrenia and ALS. In recent years, there has been a surge in the development of both diagnostics and therapeutics that take advantage of the expression and activity of PSMA/GCPII. These include gene therapy, immunotherapy, chemotherapy and radiotherapy. In this review, we discuss the biological roles that PSMA/GCPII plays, both in normal and diseased tissues, and the current therapies exploiting its activity that are at the preclinical stage. We conclude by giving an expert opinion on the future direction of PSMA/GCPII based therapies and diagnostics and hurdles that need to be overcome to make them effective and viable.
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Affiliation(s)
- James C Evans
- Pharmacodelivery Group, School of Pharmacy, University College Cork, Cork, Ireland
| | - Meenakshi Malhotra
- Pharmacodelivery Group, School of Pharmacy, University College Cork, Cork, Ireland
| | - John F Cryan
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
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