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Woodcock VK, Chen J, Purshouse K, Butcher C, Collins L, Haddon C, Verrall G, Elhussein L, Roberts C, Tarlton A, Rei M, Napolitani G, Salio M, Middleton MR, Cerundolo V, Crew J, Protheroe AS. PemBla: A Phase 1 study of intravesical pembrolizumab in recurrent non‐muscle‐invasive bladder cancer. BJUI COMPASS 2023; 4:322-330. [PMID: 37025470 PMCID: PMC10071078 DOI: 10.1002/bco2.220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/20/2022] [Accepted: 12/30/2022] [Indexed: 01/15/2023] Open
Abstract
Objectives This study aimed to investigate the anti-PD-1 inhibitor pembrolizumab as a potential agent for use in non-muscle-invasive bladder cancer (NMIBC) by conducting a Phase 1 safety run-in study to assess the safety and tolerability of intravesical pembrolizumab after transurethral resection of the bladder tumour (TURBT). Patients and methods Eligible patients had recurrent NMIBC for which adjuvant treatment post TURBT was a reasonable treatment option, Eastern Cooperative Oncology Group Performance Status (ECOG PS) 0-1 and adequate end-organ function. Pembrolizumab was administered by intravesical instillation once weekly for a total of six doses. Intra-patient dose escalation was performed in three paired patient cohorts with doses starting at 50 mg and increasing through 100 mg to a maximum of 200 mg. Adverse events (AEs) were assessed using Common Terminology Criteria for Adverse Events (CTCAE) v4.03 with dose limiting toxicity (DLT) defined as a clinically significant, drug-related, Grade 4 haematological or Grade 3 or higher non-haematological toxicity occurring within 7 days of administration of the first treatment at a given dose for that patient. Results Six patients were treated with no DLTs seen during dose escalation. Drug-related AEs were of low grade and included dysuria and fatigue. All patients completed six doses of treatment as planned. Pharmacokinetic and pharmacodynamic assays did not detect any pembrolizumab in the serum following repeated intravesical administration, and no changes in peripheral immune cell populations were observed. Conclusions Administration of intravesical pembrolizumab was well tolerated and did not raise any safety concerns in patients with NMIBC following TURBT. There was no evidence of systemic absorption or systemic immune effects following intravesical administration. Further studies are required to assess whether intravesical administration has anti-tumour activity.
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Affiliation(s)
- Victoria K. Woodcock
- Department of Oncology Churchill Hospital, University of Oxford Oxford UK
- MRC Human Immunology Unit MRC Weatherall Institute of Molecular Medicine Oxford UK
| | - Ji‐Li Chen
- MRC Human Immunology Unit MRC Weatherall Institute of Molecular Medicine Oxford UK
| | - Karin Purshouse
- Department of Oncology Churchill Hospital, University of Oxford Oxford UK
| | - Chrissie Butcher
- Oncology Clinical Trials Office, Department of Oncology University of Oxford Oxford UK
| | - Linda Collins
- Oncology Clinical Trials Office, Department of Oncology University of Oxford Oxford UK
| | - Caroline Haddon
- Department of Oncology Churchill Hospital, University of Oxford Oxford UK
| | | | - Leena Elhussein
- Centre for Statistics in Medicine University of Oxford Oxford UK
| | - Corran Roberts
- Centre for Statistics in Medicine University of Oxford Oxford UK
| | - Andrea Tarlton
- MRC Human Immunology Unit MRC Weatherall Institute of Molecular Medicine Oxford UK
| | - Margarida Rei
- MRC Human Immunology Unit MRC Weatherall Institute of Molecular Medicine Oxford UK
| | - Giorgio Napolitani
- MRC Human Immunology Unit MRC Weatherall Institute of Molecular Medicine Oxford UK
| | - Mariolina Salio
- MRC Human Immunology Unit MRC Weatherall Institute of Molecular Medicine Oxford UK
| | - Mark R. Middleton
- Department of Oncology Churchill Hospital, University of Oxford Oxford UK
- National Institute for Health Research Oxford Biomedical Research Centre Oxford UK
| | - Vincenzo Cerundolo
- MRC Human Immunology Unit MRC Weatherall Institute of Molecular Medicine Oxford UK
| | - Jeremy Crew
- Department of Urology Churchill Hospital Oxford UK
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Not "If", but "When" and "How": Testing Antibody-Drug Conjugates in Patients with Non-muscle-invasive Bladder Cancer. Eur Urol 2021; 81:143-144. [PMID: 34838351 DOI: 10.1016/j.eururo.2021.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/05/2021] [Indexed: 11/21/2022]
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3
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Garris CS, Wong JL, Ravetch JV, Knorr DA. Dendritic cell targeting with Fc-enhanced CD40 antibody agonists induces durable antitumor immunity in humanized mouse models of bladder cancer. Sci Transl Med 2021; 13:13/594/eabd1346. [PMID: 34011627 DOI: 10.1126/scitranslmed.abd1346] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 11/12/2020] [Accepted: 03/26/2021] [Indexed: 12/30/2022]
Abstract
Intravesical immunotherapy using Bacille Calmette-Guérin (BCG) attenuated bacteria delivered transurethrally to the bladder has been the standard of care for patients with high-risk non-muscle-invasive bladder cancer (NMIBC) for several decades. BCG therapy continues to be limited by high rates of disease recurrence and progression, and patients with BCG-unresponsive disease have few effective salvage therapy options besides radical cystectomy, highlighting a need for new therapies. We report that the immune-stimulatory receptor CD40 is highly expressed on dendritic cells (DCs) within the bladder tumor microenvironment of orthotopic bladder cancer mouse models, recapitulating CD40 expression by DCs found in human disease. We demonstrate that local CD40 agonism in mice with orthotopic bladder cancer through intravesical delivery of anti-CD40 agonist antibodies drives potent antitumor immunity and induces pharmacodynamic effects in the bladder tumor microenvironment, including a reduction in CD8+ T cells with an exhausted phenotype. We further show that type 1 conventional DCs (cDC1) and CD8+ T cells are required for both bladder cancer immune surveillance and anti-CD40 agonist antibody responses. Using orthotopic murine models humanized for CD40 and Fcγ receptors, we demonstrate that intravesical treatment with a fully human, Fc-enhanced anti-CD40 agonist antibody (2141-V11) induces robust antitumor activity in both treatment-naïve and treatment-refractory settings, driving long-term systemic antitumor immunity with no evidence of systemic toxicity. These findings support targeting CD40-expressing DCs in the bladder cancer microenvironment through an intravesical agonistic antibody approach for the treatment of NMIBC.
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Affiliation(s)
- Christopher S Garris
- Laboratory of Molecular Genetics and Immunology, Rockefeller University, New York, NY 10065, USA
| | - Jeffrey L Wong
- Laboratory of Molecular Genetics and Immunology, Rockefeller University, New York, NY 10065, USA.,Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Jeffrey V Ravetch
- Laboratory of Molecular Genetics and Immunology, Rockefeller University, New York, NY 10065, USA.
| | - David A Knorr
- Laboratory of Molecular Genetics and Immunology, Rockefeller University, New York, NY 10065, USA. .,Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
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4
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Abstract
Mucin 1 (MUC1) is a large, transmembrane mucin glycoprotein overexpressed in most adenocarcinomas and plays an important role in tumor progression. Regarding its cellular distribution, biochemical features, and function, tumor-related MUC1 varies from the MUC1 expressed in normal cells. Therefore, targeting MUC1 for cancer immunotherapy and imaging can exploit the difference between cancerous and normal cells. Radiopharmaceuticals have a potential use as carriers for the delivery of radionuclides to tumors for a diagnostic imaging and radiotherapy. Several radiolabeled targeting molecules like peptides, antibodies, and aptamers have been efficiently demonstrated in detecting and treating cancer by targeting MUC1. This review provides a brief overview of the current status of developments and applications of MUC1-targeted radiopharmaceuticals in cancer imaging and therapy.
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Affiliation(s)
- Fariba Maleki
- Research Center of oils and fats, Food and Drug Administration, Kermanshah University of Medical sciences, Kermanshah, Iran
| | - Farzaneh Rezazadeh
- Department of Radiopharmacy, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Kambiz Varmira
- Research Center of oils and fats, Food and Drug Administration, Kermanshah University of Medical sciences, Kermanshah, Iran
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5
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Pourjafar M, Samadi P, Saidijam M. MUC1 antibody-based therapeutics: the promise of cancer immunotherapy. Immunotherapy 2020; 12:1269-1286. [PMID: 33019839 DOI: 10.2217/imt-2020-0019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Antibody-based targeted therapies have been able to target cancers with enhanced specificity and high efficacy. In this regard, identifying cancer markers (antigens) that are only present (tumor-specific antigens) or have an increased expression (tumor-associated antigen) on the surface of cancer cells is a crucial step for targeted cancer treatment. Various cancer antigens have already been used for therapeutic and diagnostic purposes. MUC1 is one of the most important tumor markers with high levels of expression in various solid tumors which makes it as a potential target for antibody-based therapies. This review discusses preclinical and clinical results from various platforms based on monoclonal antibodies, nanobodies as well as bispecific antibodies against MUC1. We also highlight unmet challenges that must be overcome to generate more effective cancer immunotherapy strategies.
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Affiliation(s)
- Mona Pourjafar
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.,Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Pouria Samadi
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.,Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Massoud Saidijam
- Student Research Committee, Hamadan University of Medical Sciences, Hamadan, Iran
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6
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Bhatia R, Gautam SK, Cannon A, Thompson C, Hall BR, Aithal A, Banerjee K, Jain M, Solheim JC, Kumar S, Batra SK. Cancer-associated mucins: role in immune modulation and metastasis. Cancer Metastasis Rev 2020; 38:223-236. [PMID: 30618016 DOI: 10.1007/s10555-018-09775-0] [Citation(s) in RCA: 122] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Mucins (MUC) protect epithelial barriers from environmental insult to maintain homeostasis. However, their aberrant overexpression and glycosylation in various malignancies facilitate oncogenic events from inception to metastasis. Mucin-associated sialyl-Tn (sTn) antigens bind to various receptors present on the dendritic cells (DCs), macrophages, and natural killer (NK) cells, resulting in overall immunosuppression by either receptor masking or inhibition of cytolytic activity. MUC1-mediated interaction of tumor cells with innate immune cells hampers cross-presentation of processed antigens on MHC class I molecules. MUC1 and MUC16 bind siglecs and mask Toll-like receptors (TLRs), respectively, on DCs promoting an immature DC phenotype that in turn reduces T cell effector functions. Mucins, such as MUC1, MUC2, MUC4, and MUC16, interact with or form aggregates with neutrophils, macrophages, and platelets, conferring protection to cancer cells during hematological dissemination and facilitate their spread and colonization to the metastatic sites. On the contrary, poor glycosylation of MUC1 and MUC4 at the tandem repeat region (TR) generates cancer-specific immunodominant epitopes. The presence of MUC16 neo-antigen-specific T cell clones and anti-MUC1 antibodies in cancer patients suggests that mucins can serve as potential targets for developing cancer therapeutics. The present review summarizes the molecular events involved in mucin-mediated immunomodulation, and metastasis, as well as the utility of mucins as targets for cancer immunotherapy and radioimmunotherapy.
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Affiliation(s)
- Rakesh Bhatia
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198-5870, USA
| | - Shailendra K Gautam
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198-5870, USA
| | - Andrew Cannon
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198-5870, USA
| | - Christopher Thompson
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198-5870, USA
| | - Bradley R Hall
- Department of Surgery, University of Nebraska Medical Center, Omaha, NE, USA
| | - Abhijit Aithal
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198-5870, USA
| | - Kasturi Banerjee
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198-5870, USA
| | - Maneesh Jain
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198-5870, USA.,Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA
| | - Joyce C Solheim
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA
| | - Sushil Kumar
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198-5870, USA
| | - Surinder K Batra
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, 68198-5870, USA. .,Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA. .,Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA.
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7
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Radioimmunotherapy. Clin Nucl Med 2020. [DOI: 10.1007/978-3-030-39457-8_34] [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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8
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Doyle E, Crew J, Mostafid H, Tuthill M, Cerundolo V, Gerristen W, Protheroe A. Urothelial cancer: a narrative review of the role of novel immunotherapeutic agents with particular reference to the management of non-muscle-invasive disease. BJU Int 2019; 123:947-958. [PMID: 30548196 DOI: 10.1111/bju.14643] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
AIM This narrative review describes current guidelines for treating NMIBC, provides an overview of the principle behind immune checkpoint inhibition, and summarizes current evidence for checkpoint inhibitors in urothelial malignancy. Further, we discuss potential strategies for immune checkpoint inhibition in the management of NMIBC. BACKGROUND Adjuvant intravesical BCG immunotherapy has been the mainstay of treatment for high-risk non-muscle-invasive bladder cancer (NMIBC) for decades but is associated with both a significant side effect profile and failure rate. Recently, a substantial body of trial data has been published demonstrating the successful use of systemic immunotherapy in the treatment of advanced urothelial malignancy and, in particular, a class of drugs known as 'immune checkpoint inhibitors'. This has led to the approval of a number of these drugs by the UK National Institute of Health and Care Excellence and the US Food and Drug Administration, and ongoing trials are examining use in the management of NMIBC. METHODS To identify relevant published data, using the PubMed/ Medline search engine, an online search of the Pubmed/ Medline archives was conducted using the terms bladder cancer' in combination with 'checkpoint inhibitors', and limited to articles in English published between 1966 and September 2017.To identify ongoing trials of interest but not yet published, a further search of the clinical trials.gov search engine was conducted using the term 'non-muscle-invasive bladder cancer'. CONCLUSION There has been little advance in available adjuvant therapy for NMIBC treated with TURBT. Current intravesical therapies are associated with a high recurrence rate and significant side effect profile. The impending publication of the wealth of ongoing trials, both into the delivery and efficacy of checkpoint inhibition will direct the future treatment of NMIBC.
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Affiliation(s)
- Emma Doyle
- Department of Oncology, Oxford Cancer and Haematology Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Jeremy Crew
- Department of Urology, Oxford Cancer and Haematology Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Hugh Mostafid
- Department of Urology, Royal Surrey County Hospital Foundation Trust, Guildford, UK
| | - Mark Tuthill
- Department of Oncology, Oxford Cancer and Haematology Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Vincenzo Cerundolo
- MRC Human Immunology Unit, Radcliffe Department of Medicine, Weatherall Institute of Molecular Medicine, Oxford, UK
| | - Winald Gerristen
- Department of Medical Oncology, Radboud University Medical Centre, Nijmegan, The Netherlands
| | - Andrew Protheroe
- Department of Oncology, Oxford Cancer and Haematology Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
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9
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Zhou D, Xu L, Huang W, Tonn T. Epitopes of MUC1 Tandem Repeats in Cancer as Revealed by Antibody Crystallography: Toward Glycopeptide Signature-Guided Therapy. Molecules 2018; 23:molecules23061326. [PMID: 29857542 PMCID: PMC6099590 DOI: 10.3390/molecules23061326] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 05/20/2018] [Accepted: 05/22/2018] [Indexed: 02/06/2023] Open
Abstract
Abnormally O-glycosylated MUC1 tandem repeat glycopeptide epitopes expressed by multiple types of cancer have long been attractive targets for therapy in the race against genetic mutations of tumor cells. Glycopeptide signature-guided therapy might be a more promising avenue than mutation signature-guided therapy. Three O-glycosylated peptide motifs, PDTR, GSTA, and GVTS, exist in a tandem repeat HGVTSAPDTRPAPGSTAPPA, containing five O-glycosylation sites. The exact peptide and sugar residues involved in antibody binding are poorly defined. Co-crystal structures of glycopeptides and respective monoclonal antibodies are very few. Here we review 3 groups of monoclonal antibodies: antibodies which only bind to peptide portion, antibodies which only bind to sugar portion, and antibodies which bind to both peptide and sugar portions. The antigenicity of peptide and sugar portions of glyco-MUC1 tandem repeat were analyzed according to available biochemical and structural data, especially the GSTA and GVTS motifs independent from the most studied PDTR. Tn is focused as a peptide-modifying residue in vaccine design, to induce glycopeptide-binding antibodies with cross reactivity to Tn-related tumor glycans, but not glycans of healthy cells. The unique requirement for the designs of antibody in antibody-drug conjugate, bi-specific antibodies, and chimeric antigen receptors are also discussed.
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Affiliation(s)
- Dapeng Zhou
- Shanghai Pulmonary Hospital Affiliated with Tongji University School of Medicine, Shanghai 200092, China.
| | - Lan Xu
- Laboratory of Antibody Structure, Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201203, China.
| | - Wei Huang
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences and iHuman Institute, ShanghaiTech University, Shanghai 201203, China.
| | - Torsten Tonn
- Institute for Transfusion Medicine Dresden, German Red Cross Blood Donation Service North-East, D-01307 Dresden, Germany.
- Medical Faculty, Carl Gustav Carus Technical University Dresden, D-01307 Dresden, Germany.
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10
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Nabavinia MS, Gholoobi A, Charbgoo F, Nabavinia M, Ramezani M, Abnous K. Anti-MUC1 aptamer: A potential opportunity for cancer treatment. Med Res Rev 2017; 37:1518-1539. [PMID: 28759115 DOI: 10.1002/med.21462] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 06/19/2017] [Accepted: 06/30/2017] [Indexed: 01/10/2023]
Abstract
Mucin 1 (MUC1) is a protein usually found on the apical surface of most normal secretory epithelial cells. However, in most adenocarcinomas, MUC1 is overexpressed, so that it not only appears over the entire cell surface, but is also shed as MUC1 fragments into the blood stream. These phenomena pinpoint MUC1 as a potential target for the diagnosis and treatment of cancer; consequently, interest has increased in MUC1 as a molecular target for overcoming cancer therapy challenges. MUC1 currently ranks second among 75 antigen candidates for cancer vaccines, and different antibodies or aptamers against MUC1 protein are proving useful for tracing cancer cells in the emerging field of targeted delivery. The unique properties of MUC1 aptamers as novel targeting agents, and the revolutionary role that MUC1 now plays in cancer therapy, are the focus of this review. Recent advancements in MUC1-targeted cancer therapy are also assessed.
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Affiliation(s)
- Maryam Sadat Nabavinia
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Aida Gholoobi
- Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fahimeh Charbgoo
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Mohammad Ramezani
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Nanotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Khalil Abnous
- Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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11
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Tang CK, Katsara M, Apostolopoulos V. Strategies used for MUC1 immunotherapy: human clinical studies. Expert Rev Vaccines 2014; 7:963-75. [DOI: 10.1586/14760584.7.7.963] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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12
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Vang DP, Wurz GT, Griffey SM, Kao CJ, Gutierrez AM, Hanson GK, Wolf M, DeGregorio MW. Induction of invasive transitional cell bladder carcinoma in immune intact human MUC1 transgenic mice: a model for immunotherapy development. J Vis Exp 2013:e50868. [PMID: 24300078 DOI: 10.3791/50868] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
A preclinical model of invasive bladder cancer was developed in human mucin 1 (MUC1) transgenic (MUC1.Tg) mice for the purpose of evaluating immunotherapy and/or cytotoxic chemotherapy. To induce bladder cancer, C57BL/6 mice (MUC1.Tg and wild type) were treated orally with the carcinogen N-butyl-N-(4-hydroxybutyl)nitrosamine (OH-BBN) at 3.0 mg/day, 5 days/week for 12 weeks. To assess the effects of OH-BBN on serum cytokine profile during tumor development, whole blood was collected via submandibular bleeds prior to treatment and every four weeks. In addition, a MUC1-targeted peptide vaccine and placebo were administered to groups of mice weekly for eight weeks. Multiplex fluorometric microbead immunoanalyses of serum cytokines during tumor development and following vaccination were performed. At termination, interferon gamma (IFN-γ)/interleukin-4 (IL-4) ELISpot analysis for MUC1 specific T-cell immune response and histopathological evaluations of tumor type and grade were performed. The results showed that: (1) the incidence of bladder cancer in both MUC1.Tg and wild type mice was 67%; (2) transitional cell carcinomas (TCC) developed at a 2:1 ratio compared to squamous cell carcinomas (SCC); (3) inflammatory cytokines increased with time during tumor development; and (4) administration of the peptide vaccine induces a Th1-polarized serum cytokine profile and a MUC1 specific T-cell response. All tumors in MUC1.Tg mice were positive for MUC1 expression, and half of all tumors in MUC1.Tg and wild type mice were invasive. In conclusion, using a team approach through the coordination of the efforts of pharmacologists, immunologists, pathologists and molecular biologists, we have developed an immune intact transgenic mouse model of bladder cancer that expresses hMUC1.
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Affiliation(s)
- Daniel P Vang
- Department of Internal Medicine, Division of Hematology and Oncology, University of California, Davis
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13
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The role of tumour-associated MUC1 in epithelial ovarian cancer metastasis and progression. Cancer Metastasis Rev 2013; 32:535-51. [DOI: 10.1007/s10555-013-9423-y] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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14
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Szymański P, Frączek T, Markowicz M, Mikiciuk-Olasik E. Development of copper based drugs, radiopharmaceuticals and medical materials. Biometals 2012; 25:1089-112. [PMID: 22914969 PMCID: PMC3496555 DOI: 10.1007/s10534-012-9578-y] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 08/03/2012] [Indexed: 01/23/2023]
Abstract
Copper is one of the most interesting elements for various biomedical applications. Copper compounds show vast array of biological actions, including anti-inflammatory, anti-proliferative, biocidal and other. It also offers a selection of radioisotopes, suitable for nuclear imaging and radiotherapy. Quick progress in nanotechnology opened new possibilities for design of copper based drugs and medical materials. To date, copper has not found many uses in medicine, but number of ongoing research, as well as preclinical and clinical studies, will most likely lead to many novel applications of copper in the near future.
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Affiliation(s)
- Paweł Szymański
- Department of Pharmaceutical Chemistry and Drug Analysis, Medical University of Lodz, Muszyńskiego 1, 90-151, Lodz, Poland.
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15
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Schoonooghe S, Laoui D, Van Ginderachter JA, Devoogdt N, Lahoutte T, De Baetselier P, Raes G. Novel applications of nanobodies for in vivo bio-imaging of inflamed tissues in inflammatory diseases and cancer. Immunobiology 2012; 217:1266-72. [PMID: 22884356 DOI: 10.1016/j.imbio.2012.07.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 07/09/2012] [Accepted: 07/14/2012] [Indexed: 12/25/2022]
Abstract
In vivo imaging technology holds promise for refined monitoring of inflammation, both in the clinic and in preclinical animal models, with applications including improved diagnosis, prognosis and therapy monitoring. In particular, molecular imaging, aimed at non-invasively studying molecular and cellular processes in intact organisms, can hereby not only provide information about the amount of inflammation, but also on the type of inflammation and on cells and/or receptors involved. Hereto, an important requisite is the availability of the proper biomarkers and specific probes for targeting these biomarkers. In the current review, we focus on a number of markers on inflamed endothelium and infiltrating myeloid cells (including macrophages) as interesting targets for tracking inflammatory reactions and argue that such markers are not only useful in case of inflammatory diseases of infectious or autoimmune origin, but also for monitoring cancer evolution through the associated inflammation. We elaborate on nanobodies as innovative, specific probes to target these inflammation-associated markers for in vivo molecular imaging.
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Affiliation(s)
- Steve Schoonooghe
- Cellular and Molecular Immunology Unit, Vrije Universiteit Brussel, Brussels, Belgium
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16
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Steiner M, Neri D. Antibody-radionuclide conjugates for cancer therapy: historical considerations and new trends. Clin Cancer Res 2012; 17:6406-16. [PMID: 22003068 DOI: 10.1158/1078-0432.ccr-11-0483] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
When delivered at a sufficient dose and dose rate to a neoplastic mass, radiation can kill tumor cells. Because cancer frequently presents as a disseminated disease, it is imperative to deliver cytotoxic radiation not only to the primary tumor but also to distant metastases, while reducing exposure of healthy organs as much as possible. Monoclonal antibodies and their fragments, labeled with therapeutic radionuclides, have been used for many years in the development of anticancer strategies, with the aim of concentrating radioactivity at the tumor site and sparing normal tissues. This review surveys important milestones in the development and clinical implementation of radioimmunotherapy and critically examines new trends for the antibody-mediated targeted delivery of radionuclides to sites of cancer.
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Affiliation(s)
- Martina Steiner
- Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland
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Development of a large scale production of 67Cu from 68Zn at the high energy proton accelerator: closing the 68Zn cycle. Appl Radiat Isot 2011; 70:423-9. [PMID: 22142633 DOI: 10.1016/j.apradiso.2011.10.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 09/19/2011] [Accepted: 10/13/2011] [Indexed: 11/21/2022]
Abstract
A number of research irradiations of (68)Zn was carried out at Brookhaven Linac Isotope Producer aiming to develop a practical approach to produce the radioisotope (67)Cu through the high energy (68)Zn(p,2p)(67)Cu reaction. Disks of enriched zinc were prepared by electrodeposition of (68)Zn on aluminum or titanium substrate and isolated in the aluminum capsule for irradition. Irradiations were carried out with 128, 105 and 92 MeV protons for at least 24h. After irradiation the disk was chemically processed to measure production yield and specific activity of (67)Cu and to reclaim the target material. The recovered (68)Zn was irradiated and processed again. The chemical procedure comprised BioRad cation exchange, Chelex-100 and anion exchange columns. Reduction of the oxidation degree of copper allowed for more efficient Cu/Co/Zn separation on the anion exchange column. No radionuclides other than copper isotopes were detected in the final product. The chemical yield of (67)Cu reached 92-95% under remote handling conditions in a hot box. Production yield of (67)Cu averaged 29.2 μCi/[μA-h×g (68)Zn] (1.08MBq/[μA-h×g (68)Zn]) in 24h irradiations. The best specific activity achieved was 18.6 mCi/μg (688.2 MBq/μg).
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van Oosten M, Crane LM, Bart J, van Leeuwen FW, van Dam GM. Selecting Potential Targetable Biomarkers for Imaging Purposes in Colorectal Cancer Using TArget Selection Criteria (TASC): A Novel Target Identification Tool. Transl Oncol 2011; 4:71-82. [PMID: 21461170 PMCID: PMC3069650 DOI: 10.1593/tlo.10220] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Revised: 10/23/2010] [Accepted: 11/01/2010] [Indexed: 12/19/2022] Open
Abstract
Peritoneal carcinomatosis (PC) of colorectal origin is associated with a poor prognosis. However, cytoreductive surgery combined with hyperthermic intraperitoneal chemotherapy is available for a selected group of PC patients, which significantly increases overall survival rates up to 30%. As a consequence, there is substantial room for improvement. Tumor targeting is expected to improve the treatment efficacy of colorectal cancer (CRC) further through 1) more sensitive preoperative tumor detection, thus reducing overtreatment; 2) better intraoperative detection and surgical elimination of residual disease using tumor-specific intraoperative imaging; and 3) tumor-specific targeted therapeutics. This review focuses, in particular, on the development of tumor-targeted imaging agents. A large number of biomarkers are known to be upregulated in CRC. However, to date, no validated criteria have been described for the selection of the most promising biomarkers for tumor targeting. Such a scoring system might improve the selection of the correct biomarker for imaging purposes. In this review, we present the TArget Selection Criteria (TASC) scoring system for selection of potential biomarkers for tumor-targeted imaging. By applying TASC to biomarkers for CRC, we identified seven biomarkers (carcinoembryonic antigen, CXC chemokine receptor 4, epidermal growth factor receptor, epithelial cell adhesion molecule, matrix metalloproteinases, mucin 1, and vascular endothelial growth factor A) that seem most suitable for tumor-targeted imaging applications in colorectal cancer. Further cross-validation studies in CRC and other tumor types are necessary to establish its definitive value.
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Affiliation(s)
- Marleen van Oosten
- Department of Surgery, Division of Surgical Oncology, Surgical Research Laboratory/BioOptical Imaging Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Schoonooghe S, Burvenich I, Vervoort L, De Vos F, Mertens N, Grooten J. PH1-derived bivalent bibodies and trivalent tribodies bind differentially to shed and tumour cell-associated MUC1. Protein Eng Des Sel 2010; 23:721-8. [PMID: 20616115 DOI: 10.1093/protein/gzq044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Most adenocarcinomas express altered MUC1 as a tumour-associated antigen. Due to suboptimal glycosylation in tumour-associated MUC1, the apomucin core is exposed, revealing new epitopes for antibody-directed immunotherapy. The human PH1 Fab binds specifically to this MUC1 apomucin. We describe the engineering and functional characterization of bi- and trivalent recombinant antibody derivatives from the PH1 Fab. Bi- and tribodies were made using the disulfide-stabilized Fab fragment as a heterodimerization scaffold with PH1 single-chain variable fragments fused to either one or both Fab-chain C-termini. Immunoassays revealed 27- and 165-fold improved dissociation constants (K(D) = 30 and 5 nM) of the PH1 bi- and tribodies compared with the parental Fab (K(D) = 820 nM). Unexpectedly, major differences were seen in the ability of the antibody constructs to bind shed and tumour cell-tethered MUC1. While the tribody did not discriminate between both MUC1 forms, the bibody demonstrated preferential interaction with membrane-bound MUC1 compared with shed MUC1. This preferential recognition of membrane-bound MUC1, along with the high serum stability of the bibody, its intermediate size and efficient internalization by MUC1(+) cells, makes the human PH1-derived bibody a valuable candidate as a cancer-targeting therapeutic.
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Affiliation(s)
- Steve Schoonooghe
- Molecular Immunology Laboratory, Department of Molecular Biology, Ghent University, Technologiepark 927, B-9052 Zwijnaarde, Belgium
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Abstract
Ovarian cancer is the most lethal gynecologic malignancy and the five-year survival rate is only 35% after diagnosis. Epithelial ovarian cancer is a highly metastatic disease characterized by widespread peritoneal dissemination and ascites. The death incidences from ovarian cancer could be significantly lowered by developing new methods for the early diagnosis and treatment of this fatal disease. Several potential markers have been identified recently. However, mucins are the most promising markers for ovarian cancer diagnosis. Mucins are large extracellular, heavily glycosylated proteins and their aberrant expression has been implicated in the pathogenesis of a variety of cancers, including ovarian cancer. This review will summarize known facts about the pathological and molecular characteristics of ovarian cancer, the current status of ovarian cancer markers, as well as general information about mucins, the putative role of mucins in the progression of ovarian cancer and their potential use for the early diagnosis and treatment of this disease.
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Pfost B, Seidl C, Autenrieth M, Saur D, Bruchertseifer F, Morgenstern A, Schwaiger M, Senekowitsch-Schmidtke R. Intravesical α-Radioimmunotherapy with 213Bi-Anti-EGFR-mAb Defeats Human Bladder Carcinoma in Xenografted Nude Mice. J Nucl Med 2009; 50:1700-8. [DOI: 10.2967/jnumed.109.065961] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Di Bartolo N, Smith SV, Hetherington E, Sargeson A. An Investigation into the Potential of SarAr for Use in 64Cu Radioimmunotherapy. Aust J Chem 2009. [DOI: 10.1071/ch09369] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The B72.3 monoclonal antibody was radiolabelled with 123I, and with 111In and 64Cu, using DTPA and SarAr, respectively. Their biodistribution in tumour-bearing nude mice was used to calculate the dosimetry of their respective therapeutic analogue, using 131I, 90Y, 67Cu, and 64Cu. Two dosimetry models were used: one using the classical approach and a second model that takes into consideration the chemical stability of the radiolabelling methods employed and the biological clearance of each radioimmunoconjugate. Results clearly show that the 64Cu-SarAr-B72.3 could be used as a therapeutic agent and, theoretically, be at least as effective as any of the other therapeutic radionuclides currently studied, such as 131I, 90Y, and 67Cu.
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Singh AP, Senapati S, Ponnusamy MP, Jain M, Lele SM, Davis JS, Remmenga S, Batra SK. Clinical potential of mucins in diagnosis, prognosis, and therapy of ovarian cancer. Lancet Oncol 2008; 9:1076-85. [PMID: 19012856 DOI: 10.1016/s1470-2045(08)70277-8] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Knowledge of mucins and their multiple roles in various normal and pathological processes has improved greatly in the past two decades. Mucins belong to a family of glycoproteins characterised by densely O-glycosylated repetitive domains and expressed by various surface epithelial cells. Altered expression of mucins is present in various diseases, including cancer. Ovarian cancer is the sixth most common cancer worldwide and the seventh leading cause of cancer-related deaths in women. The most common ovarian cancer is epithelial ovarian carcinoma, which is characterised by few early symptoms, widespread peritoneal dissemination, and ascites at advanced stages that result in poor prognosis. After diagnosis, 5 year survival is only 35-45%. Therefore, improved strategies for early diagnosis and treatment are needed. Because of the surface epithelial origin of epithelial ovarian cancer, mucins are obvious biomolecules for investigation as markers for early diagnosis and as therapeutic targets. We discuss the potential role and clinical usefulness of mucins in early diagnosis, prognosis, and treatment of ovarian cancer.
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Affiliation(s)
- Ajay P Singh
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, Nebraska, USA
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Aarts F, Bleichrodt RP, Oyen WJG, Boerman OC. Intracavitary radioimmunotherapy to treat solid tumors. Cancer Biother Radiopharm 2008; 23:92-107. [PMID: 18298333 DOI: 10.1089/cbr.2007.0412] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Radioimmunotherapy (RIT) potentially is an attractive treatment for radiosensitive early-stage solid tumors and as an adjuvant to cytoreductive surgery. Topical administration of RIT may improve the efficacy because higher local concentrations are achieved. We reviewed the results of locally applied radiolabeled monoclonal antibodies for the treatment of solid tumors. Intracavitary RIT in patients with ovarian cancer and glioma showed improved targeting after local administration, as compared to the intravenous administration. In addition, various studies showed the feasibility of locally applied RIT in these patients. In studies that included patients with small-volume disease, adjuvant RIT in ovarian cancer and glioma showed to be at least as effective as standard therapy. The information about RIT for peritoneal carcinomatosis of colorectal origin is scarce, while results from preclinical data are promising. RIT may be applied for other, relatively unexplored indications. Studies on the application of radiolabeled antibodies in early urothelial cell cancer have been performed, showing that intracavitary RIT may hold a promise. Moreover, in patients with malignant pleural mesothelioma or malignant pleural effusion, RIT may play a role in the palliative treatment. Intracavitary RIT limits toxicity and improves tumor targeting. RIT is more effective in patients with small-volume disease of solid cancers. RIT may have potential for palliation in patients with malignant pleural mesothelioma or malignant pleural effusion. The future of RIT may, therefore, not only be in the inclusion in contemporary multimodality treatment, but also in the expansion to palliative treatment.
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Affiliation(s)
- Frits Aarts
- Department of Surgery, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Radioimmunotherapy. Clin Nucl Med 2008. [DOI: 10.1007/978-3-540-28026-2_26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wang L, Ma J, Liu F, Yu Q, Chu G, Perkins AC, Li Y. Expression of MUC1 in primary and metastatic human epithelial ovarian cancer and its therapeutic significance. Gynecol Oncol 2007; 105:695-702. [PMID: 17368732 DOI: 10.1016/j.ygyno.2007.02.004] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2006] [Revised: 02/02/2007] [Accepted: 02/02/2007] [Indexed: 02/04/2023]
Abstract
BACKGROUND MUC1 is associated with cellular transformation and tumorigenicity and is considered as an important tumor-associated antigen (TAA) for cancer therapy. The objective of this study was to evaluate the patterns of MUC1 expression in primary tumors and metastatic lesions in the advanced stages of epithelial ovarian cancers (EOCs) and correlate the expression with clinicopathological features. METHODS The expression of MUC1 was examined on frozen tissue sections from primary EOC (n=42), the matched metastatic lesions (n=30) and paraffin-embedded tissue sections from primary EOC (n=60), normal ovarian tissues (n=20) using immunohistochemistry (IHC) by monoclonal antibody (MAb) C595. RESULTS The expression of MUC1 was found in 92% (39/42) of EOC and 90% (27/30) of the matched metastatic lesions in frozen tissue sections respectively while the expression of MUC1 was found in 95% (57/60) of EOC and 5% (1/20) of normal ovarian tissues in paraffin-embedded sections respectively. Most of the tumors showed moderate to strong intensity staining while normal ovarian tissues only showed weak intensity staining. The overexpression of MUC1 was significantly associated with various progression parameters such as tumor stage, grade, residual disease status and presence of ascites (P<0.05). CONCLUSIONS MUC1 is overexpressed in above 90% of late stage of EOC and of metastatic lesions but not in normal ovarian tissues, and the high expression of MUC1 is correlated with EOC progression. MUC1 antigen may be a useful therapeutic target to prevent the development of incurable, recurrent metastatic EOC.
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MESH Headings
- Adenocarcinoma, Mucinous/metabolism
- Adenocarcinoma, Mucinous/pathology
- Adult
- Aged
- Amino Acid Sequence
- Antibodies, Monoclonal/chemistry
- Antibodies, Monoclonal/immunology
- Antigens, Neoplasm/biosynthesis
- Antigens, Neoplasm/immunology
- Carcinoma, Endometrioid/metabolism
- Carcinoma, Endometrioid/pathology
- Cystadenocarcinoma, Serous/metabolism
- Cystadenocarcinoma, Serous/pathology
- Epithelial Cells/pathology
- Female
- Humans
- Immunohistochemistry
- Middle Aged
- Molecular Sequence Data
- Mucin-1
- Mucins/biosynthesis
- Mucins/immunology
- Ovarian Neoplasms/metabolism
- Ovarian Neoplasms/pathology
- Paraffin Embedding
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Affiliation(s)
- Li Wang
- Department of Gynecologic Oncology, Henan Tumor Hospital, Zhengzhou, Henan 450008, China.
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Wang J, Abbas Rizvi SM, Madigan MC, Cozzi PJ, Power CA, Qu CF, Morgenstern A, Apostolidis C, Russell PJ, Allen BJ, Li Y. Control of prostate cancer spheroid growth using 213Bi-labeled multiple targeted alpha radioimmunoconjugates. Prostate 2006; 66:1753-67. [PMID: 16955401 DOI: 10.1002/pros.20502] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Micrometastasis is a major problem for prostate cancer (CaP) patients. Our study investigated the therapeutic potential of multiple targeted alpha-therapy (MTAT) in the treatment of CaP micrometastases (spheroids) using (213)Bi-labeled multiple targeted alpha-radioimmunoconjugates. METHODS The expression of multiple tumor-associated antigens (TAAs) on frozen sections of human fresh CaP tissues and spheroids cultured from DU 145 and LNCaP-LN3 CaP cell lines was detected by immunohistochemistry and flow cytometry. Targeting vectors were two monoclonal antibodies (MAbs), and plasminogen activator inhibitor type 2 (PAI2) that binds to cell surface urokinase plasminogen activator (uPA). These vectors were labeled with (213)Bi using standard methodology. DU 145 and LNCaP-LN3 spheroids were incubated with different activities of test and control alpha-conjugates (ACs), and spheroid growth was measured for volume change and growth delay over a 50-day period using light microscopy. RESULTS TAAs were expressed heterogeneously on frozen sections from human CaP tissues and CaP spheroids. MTAT combining three ACs (one-third dose of each) with an activity of 6.4 MBq/ml completely targeted small DU 145 and LNCaP-LN3 spheroids (diameter <100 microm) and slightly regressed the growth of medium spheroids (180-200 microm); MTAT with 2.2 or 4.8 MBq/ml activities delayed the growth of tumor spheroids. CONCLUSIONS Our results suggest that the cytotoxicity of MTAT to CaP spheroids is highly dependent on antigenic expression, concentration of radioactivity and spheroid size. MTAT may be a potent therapeutic agent for micrometastases, effectively targeting small CaP cell clusters, and overcoming the heterogeneous expression of targeted antigens.
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Affiliation(s)
- Jian Wang
- Centre for Experimental Radiation Oncology, Cancer Care Centre, St. George Hospital, New South Wales, Australia
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In vivo molecular targeted radiotherapy. Biomed Imaging Interv J 2005; 1:e9. [PMID: 21625282 PMCID: PMC3097596 DOI: 10.2349/biij.1.2.e9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2005] [Revised: 09/26/2005] [Accepted: 09/29/2005] [Indexed: 11/17/2022] Open
Abstract
Unsealed radionuclides have been in clinical therapeutic use for well over half a century. Following the early inappropriate clinical administrations of radium salts in the early 20th century, the first real clinical benefits became evident with the use of 131I-sodium iodide for the treatment of hypothyroidism and differentiated thyroid carcinoma and 32P-sodium phosphate for the treatment of polycythaemia vera. In recent years the use of bone seeking agents 89Sr, 153Sm and 186Re for the palliation of bone pain have become widespread and considerable progress has been evident with the use of 131I-MIBG and 90Y-somatostatin receptor binding agents. Although the use of monoclonal antibody based therapeutic products has been slow to evolve, the start of the 21st century has witnessed the first licensed therapeutic antibody conjugates based on 90Y and 131I for the treatment of non-Hodgkin's lymphoma. The future clinical utility of this form of therapy will depend upon the development of radiopharmaceutical conjugates capable of selective binding to molecular targets. The availability of some therapeutic radionuclides such as 188Re produced from the tungsten generator system which can produce activity as required over many months, may make this type of therapy more widely available in some remote and developing countries. Future products will involve cytotoxic radionuclides with appropriate potency, but with physical characteristics that will enable the administration of therapeutic doses with the minimal need for patient isolation. Further developments are likely to involve molecular constructs such as aptamers arising from new developments in biotechnology. Patient trials are still underway and are now examining new methods of administration, dose fractionation and the clinical introduction of alpha emitting radiopharmaceutical conjugates. This review outlines the history, development and future potential of these forms of therapy.
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Schenk-Braat EAM, Bangma CH. Immunotherapy for superficial bladder cancer. Cancer Immunol Immunother 2005; 54:414-23. [PMID: 15565330 PMCID: PMC11033020 DOI: 10.1007/s00262-004-0621-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2004] [Accepted: 09/13/2004] [Indexed: 11/28/2022]
Abstract
The treatment of superficial bladder cancer requires adjuvant therapies besides transurethral resection because of a high recurrence rate after this standard treatment alone. Current adjuvant therapies involve intravesical chemotherapy for patients at low and intermediate risk for recurrence and progression, and intravesical bacillus Calmette-Guérin for patients at intermediate and high risk. However, these adjuvant therapies fail in a significant number of patients, dictating the need for new and improved adjuvant treatment modalities for superficial bladder cancer. Immunotherapy aiming at the modulation of the immune system of the patient is a promising alternative adjuvant. This review discusses the current status of the clinical development of various immunotherapy approaches for superficial bladder cancer, including passive immunotherapy, immune stimulants, immunogene therapy and cancer vaccination.
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Affiliation(s)
- Ellen A M Schenk-Braat
- Department of Urology, Josephine Nefkens Institute, Room Be 362, PO Box 1738, 3000, DR Rotterdam, The Netherlands.
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Qu CF, Li Y, Song YJ, Rizvi SMA, Raja C, Zhang D, Samra J, Smith R, Perkins AC, Apostolidis C, Allen BJ. MUC1 expression in primary and metastatic pancreatic cancer cells for in vitro treatment by (213)Bi-C595 radioimmunoconjugate. Br J Cancer 2005; 91:2086-93. [PMID: 15599383 PMCID: PMC2409789 DOI: 10.1038/sj.bjc.6602232] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Control of micrometastatic pancreatic cancer remains a major objective in pancreatic cancer treatment. The overexpression of MUC1 mucin plays an important role in cancer metastasis. The aim of this study was to detect the expression of MUC1 in human primary tumour tissues and three pancreatic cancer cell lines (CAPAN-1, CFPAC-1 and PANC-1), and target MUC1-positive cancer cells in vitro using 213Bi-C595 alpha-immunoconjugate (AIC). The expression of MUC1 on pancreatic tumour tissues and cancer cell lines was performed by immunohistochemistry and further confirmed by confocal microscope and flow cytometry analysis on the cell surface. Cytotoxicity of 213Bi-C595 was tested by MTS assay. Apoptosis was documented using TUNEL assay. Overexpression of MUC1 was found in ∼90% of tested tumour samples and the three pancreatic cancer cell lines. 213Bi-C595 is specifically cytotoxic to pancreatic cancer cells in a concentration-dependent fashion. These results suggest that overexpression of MUC1 in pancreatic cancer is a useful target, and that the novel 213Bi-C595 AIC selectively targets pancreatic cancer cells in vitro. 213Bi-C595 may be a useful agent for the treatment of micrometastases or minimal residual disease (MRD) in pancreatic cancer patients with overexpression of MUC1 antigen.
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Affiliation(s)
- C F Qu
- Centre for Experimental Radiation Oncology, Cancer Care Centre, St George Hospital, Gray St Kogarah, NSW 2217, Australia
- University of New South Wales, NSW 2052, Australia
| | - Y Li
- Centre for Experimental Radiation Oncology, Cancer Care Centre, St George Hospital, Gray St Kogarah, NSW 2217, Australia
| | - Y J Song
- Centre for Experimental Radiation Oncology, Cancer Care Centre, St George Hospital, Gray St Kogarah, NSW 2217, Australia
- University of New South Wales, NSW 2052, Australia
| | - S M A Rizvi
- Centre for Experimental Radiation Oncology, Cancer Care Centre, St George Hospital, Gray St Kogarah, NSW 2217, Australia
| | - C Raja
- Centre for Experimental Radiation Oncology, Cancer Care Centre, St George Hospital, Gray St Kogarah, NSW 2217, Australia
| | - D Zhang
- Centre for Experimental Radiation Oncology, Cancer Care Centre, St George Hospital, Gray St Kogarah, NSW 2217, Australia
| | - J Samra
- Department of Surgery, Royal North Shore Hospital, NSW 2065, Australia
- University of Sydney, NSW 2006, Australia
| | - R Smith
- Department of Surgery, Royal North Shore Hospital, NSW 2065, Australia
- University of Sydney, NSW 2006, Australia
| | - A C Perkins
- Department of Medical Physics, Medical School, Queen's Medical Centre, Nottingham, NG7 2UH, UK
| | - C Apostolidis
- Institute for Transuranium Elements, Postfach 2340, D-76125 Karlsruhe, Germany
| | - B J Allen
- Centre for Experimental Radiation Oncology, Cancer Care Centre, St George Hospital, Gray St Kogarah, NSW 2217, Australia
- University of New South Wales, NSW 2052, Australia
- Centre for Experimental Radiation Oncology, Cancer Care Centre, St George Hospital, Gray St Kogarah, NSW 2217, Australia. E-mail:
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Wreesmann VB, Sieczka EM, Socci ND, Hezel M, Belbin TJ, Childs G, Patel SG, Patel KN, Tallini G, Prystowsky M, Shaha AR, Kraus D, Shah JP, Rao PH, Ghossein R, Singh B. Genome-wide profiling of papillary thyroid cancer identifies MUC1 as an independent prognostic marker. Cancer Res 2004; 64:3780-9. [PMID: 15172984 DOI: 10.1158/0008-5472.can-03-1460] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Clinicopathological variables used at present for prognostication and treatment selection for papillary thyroid carcinomas (PTCs) do not uniformly predict tumor behavior, necessitating identification of novel prognostic markers. Complicating the assessment is the long natural history of PTC and our rudimentary knowledge of its genetic composition. In this study we took advantage of differences in clinical behavior of two distinct variants of PTC, the aggressive tall-cell variant (TCV) and indolent conventional PTC (cPTC), to identify molecular prognosticators of outcome using complementary genome wide analyses. Comparative genome hybridization (CGH) and cDNA microarray (17,840 genes) analyses were used to detect changes in DNA copy number and gene expression in pathological cPTC and TCV. The findings from CGH and cDNA microarray analyses were correlated and validated by real-time PCR and immunohistochemical analyses on a series of 100 cases of cPTC and TCV. Genes identified by this approach were evaluated as prognostic markers in cPTC by immunohistochemistry on tissue arrays. CGH identified significant differences in the presence (76 versus 27%; P = 0.001) and type of DNA copy number aberrations in TCV compared with cPTC. Recurrent gains of 1p34-36, 1q21, 6p21-22, 9q34, 11q13, 17q25, 19, and 22 and losses of 2q21-31, 4, 5p14-q21, 6q11-22, 8q11-22, 9q11-32, and 13q21-31 were unique to TCV. Hierarchical clustering of gene expression profiles revealed significant overlap between TCV and cPTC, but further analysis identified 82 dysregulated genes differentially expressed among the PTC variants. Of these, MUC1 was of particular interest because amplification of 1q by CGH correlated with MUC1 amplification by real-time PCR analysis and protein overexpression by immunohistochemistry in TCV (P = 0.005). Multivariate analysis revealed a significant association between MUC1 overexpression and treatment outcome, independent of histopathological categorization (P = 0.03). Analysis of a validation series containing a matched group of aggressive and indolent cPTCs confirmed the association between MUC1 overexpression and survival (relative risk, 2.3; 95% confidence interval, 1.1-5.5; P = 0.03). Our data suggest that MUC1 dysregulation is associated with aggressive behavior of PTC and may serve as a prognostic marker and potential therapeutic target in this disease.
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Affiliation(s)
- Volkert B Wreesmann
- Laboratory of Epithelial Cancer Biology, Head and Neck Service, Department of Pathology, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA
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Abstract
PURPOSE For decades urologists have successfully used immunotherapy in the battle against cancer. Interleukin-2 in renal cell carcinoma and bacillus Calmette-Guerin in bladder cancer are standard primary and/or adjunctive therapies for these diseases. Recent advances in our understanding of mechanisms governing immune system activation have fostered a myriad of novel immunotherapeutic approaches that show great promise in vivo but have had limited success in human trials to date. This review highlights current immunotherapy strategies that may prove to be successful treatments for urological cancers. MATERIALS AND METHODS We performed a MEDLINE literature search for articles relating to immunotherapy in bladder, prostate and renal cell carcinoma in animals and humans. We included the most promising developments in this review. RESULTS In addition to combining existing therapies to improve their efficacy, novel approaches that attempt to exploit the immune system ability to identify, target and eradicate malignancies are now being developed. These therapies include the use of antitumoral monoclonal and bi-specific antibodies, manipulation of T-lymphocyte costimulatory molecules and the administration of newly discovered cytokines as well as the development of antitumor vaccines. CONCLUSIONS To date the full potential of immunotherapy for the treatment of urological malignancies has not been recognized. As our knowledge of the immune system expands, so too may our ability to manipulate it to affect tumor regression. This review describes the most recent and most promising developments in immunotherapy for urological malignancies.
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Affiliation(s)
- Kent G Krejci
- Department of Urology, Mayo Clinic, Rochester, Minnesota 55905, USA
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Imai M, Ohta R, Okada N, Tomlinson S. Inhibition of a complement regulatorin vivo enhances antibody therapy in a model of mammary adenocarcinoma. Int J Cancer 2004; 110:875-81. [PMID: 15170670 DOI: 10.1002/ijc.20178] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Membrane-bound complement regulatory proteins provide tumor cells with protection from antibody and complement in vitro. However, complement regulators are widely expressed on normal tissue, and inhibiting the function of complement regulatory proteins on tumor cells in vivo has not been investigated due to the absence of appropriate tumor-targeting strategies. Using a mouse model of rat mammary adenocarcinoma, we demonstrate that tumor-specific targeting of a complement regulator with a blocking antibody has functional consequences with regard to both complement deposition on tumor cells and the efficacy of monoclonal antibody therapy. Rat adenocarcinoma 13762 cells express Crry, a widely expressed rodent regulator of complement activation, and are recognized by C595 MAb, an anti-MUC1 MAb in clinical trials. Anti-rat Crry 5I2 MAb and F(ab)(2) enhanced complement deposition on C595 MAb-sensitized 13762 cells in vitro. In vivo, C595 MAb bound to 13762 tumors, albeit not specifically, but was not therapeutic when administered after tumor challenge. However, the coadministration of 5I2 MAb with C595 MAb resulted in enhanced complement deposition and significantly delayed tumor onset and reduced tumor growth; 5I2 MAb alone also enhanced complement deposition and reduced tumor growth but less effectively than when combined with C595 MAb; 5I2 MAb alone did not directly activate mouse complement, but its inhibitory effect on Crry enhanced complement deposition following complement activation by both the alternative pathway and by natural IgM reactive to 13762 cells present in mouse serum. Our proof of principle study shows that inhibiting the function of a tumor-expressed complement regulatory protein enhances immune-mediated clearance of tumor cells and improves prospects for successful immunotherapy. The results justify further research and development of targeting strategies to inhibit or downregulate complement regulatory proteins on tumor cells.
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Affiliation(s)
- Masaki Imai
- Department of Microbiology and Immunology, Medical University of South Carolina, BSB 201, 173 Ashley Avenue, Charleston, SC 29424, USA
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Palapattu GS, Reiter RE. Monoclonal antibody therapy for genitourinary oncology: promise for the future. J Urol 2002; 168:2615-23. [PMID: 12441996 DOI: 10.1016/s0022-5347(05)64230-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Metastatic or recurrent cancer continues to be the bane of the urological oncologist. Despite recent improvements in therapeutic strategies and outcomes for clinically localized disease overall survival in patients with the majority of metastatic and recurrent genitourinary malignancies remains relatively unchanged. Modern advances in the field of immunotherapy hold the promise of providing the clinical urologist/oncologist with new tools to fight urological cancer. In this review we discuss the various mAb based strategies currently under investigation for urological oncology as well as the lessons learned from similar approaches in other fields. MATERIALS AND METHODS We reviewed the literature on mAb based immunotherapy with a particular emphasis on target antigens, mAb design and potential applications in the field of urology. RESULTS Early trials with mAb therapy for solid tumor oncology met with limited success due to difficulty with mAb design and production, the development of host immunological responses against murine monoclonal antibodies (that is human anti-mouse antibodies), suboptimal target antigen selection, and poor monoclonal antibody pharmacokinetics and tumor tissue penetration. Recent advances in the fields of immunology and oncology have sought to circumvent these obstacles. Today several preliminary studies have shown the effectiveness and usefulness of mAb based strategies for urological oncology. CONCLUSIONS The field of mAb based immunotherapy continues to evolve. New discoveries in this burgeoning area of cancer therapy show promise for the future.
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Abstract
Immunotherapy is receiving interest as an alternative or adjuvant approach to the treatment of many malignancies. The potential for immune modulation as a treatment of solid tumors is the focus of cancer researchers throughout the world. Though not a novel idea, increasing technological sophistication and continued advancement in the understanding of the immune system have increased the number of novel therapeutic approaches. In urology, BCG is an excellent example of how modulation of the immune system can be used to treat malignancy, and we are only now beginning to understand its immune mechanisms. Numerous other immunotherapeutic approaches have been and are being developed and evaluated. We provide a brief overview of immunology and its relation to tumor development and growth, and focus on some of the immunotherapeutic approaches to renal cell carcinoma, prostate adenocarcinoma, and transitional cell carcinoma of the bladder.
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Affiliation(s)
- Elizabeth L Broghammer
- University of Iowa Department of Urology, 200 Hawkins Drive, 3 RCP, Iowa City, IA 52242, USA
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Safavy A, Smith DC, Bazooband A, Buchsbaum DJ. De novo synthesis of a new diethylenetriaminepentaacetic acid (DTPA) bifunctional chelating agent. Bioconjug Chem 2002; 13:317-26. [PMID: 11906270 DOI: 10.1021/bc0100861] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Diethylene triamine pentaacetic acid (DTPA) has been in extensive use as a metal chelator in the development of radiopharmaceuticals and contrast agents. The former application uses DTPA mostly as a bifunctional chelating agent (BCA) conjugated to tumor-targeting vehicles (TTVs) such as monoclonal antibodies (MAbs) and receptor-directed peptides. A new bifunctional DTPA derivative was synthesized by a fully organic scheme. This compound, N(4),N(alpha),N(alpha),N(epsilon),N(epsilon)-[pentakis(carboxymethyl)]-N(4)-(carboxymethyl)-2,6-diamino-4-azahexanoic hydrazide (20) was prepared by a convergent synthesis strategy using N(alpha)-benzyloxycarbonyl-2,3-diaminopropionic acid as the starting compound. This commercially available material was used to build a functionalized triamine which served as the molecular core template for assembling the target molecule. To evaluate the conjugation and radiolabeling capabilities of this new molecule, it was covalently attached to the anti-TAG-72 MAb, Delta CH2HuCC49, and the conjugate was radiolabeled in near-quantitative yields with yttrium-90 ((90)Y) and lutetium-177 ((177)Lu). Biodistribution of the (177)Lu-labeled DTPA-Delta CH2HuCC49 in tumor-bearing nude mice demonstrated preservation of the immunoreactivity of the MAb as indicated by high tumor uptake. In addition to the introduction of a new bifunctional DTPA, this work reports on a novel synthetic approach for preparation of this useful metal chelator and introduces a new conjugation protocol.
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Affiliation(s)
- Ahmad Safavy
- Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA.
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Smith RG, Missailidis S, Price MR. Purification of anti-MUC1 antibodies by peptide mimotope affinity chromatography using peptides derived from a polyvalent phage display library. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 766:13-26. [PMID: 11820288 DOI: 10.1016/s0378-4347(01)00422-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A polyvalent, lytic phage display system (T7Select415-1b) displaying a random peptide library has been investigated for its ability to discover novel mimotopes reactive with the therapeutic monoclonal antibody C595. Sequence analysis of enriched phage lead to the identification of a predominant sequence RNREAPRGKICS, and two other consensus sequences RXXP and RXP. The novel synthetic peptide RNREAPRGKICS was linked to beaded agarose and the performance as a mimotope affinity chromatography matrix evaluated. Antibody purified using the novel matrix was found to be of higher specific reactivity than antibody purified using the conventional epitope matrix (peptide APDTRPAPG). The RNREAPRGKICS peptide binding to C595 demonstrated a higher equilibrium association constant (K(A)=0.75 x 10(6)) than the epitope peptide (K(A)=0.16 x 10(6)). Circular dichroism showed that the novel peptide had a more highly ordered structure at 4 degrees C and room temperature, than the epitope peptide.
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Affiliation(s)
- Richard G Smith
- University of Nottingham, Cancer Research Laboratories, School of Pharmaceutical Sciences, UK.
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Simms MS, Perkins AC, Price MR, Scholfield DP, Bishop MC. 99mTechnetium-C595 radioimmunoscintigraphy: a potential staging tool for bladder cancer. BJU Int 2001; 88:686-91. [PMID: 11890238 DOI: 10.1046/j.1464-410x.2001.02348.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVES To assess whether immunoscintigraphy using a conjugate of the anti-MUC1 monoclonal antibody C595 and 99mTc could be used to target transitional cell bladder cancer after intravenous administration to patients. PATIENTS AND METHODS Twenty-one patients with invasive or metastatic transitional cell carcinoma were recruited. Patients received 1 mg of C595 labelled with 800 MBq 99mTc followed by imaging at 0.5, 6 and 24 h using a combination of planar and single-photon emission computed tomography. Of these patients, 14 subsequently underwent cystectomy, four underwent radiotherapy and the remaining three had histologically confirmed metastatic disease. The results of immunoscintigraphy were compared with surgical findings and conventional radiology. RESULTS There were no adverse reactions in any patient. Of the 20 patients who were found to have tumour at the time of the study, positive localization of antibody in tumour was apparent in 16. Of the remaining four patients, false-positive localization of antibody in presumed nodal tissue was detected in two. The remaining scan results were equivocal. In three patients, histologically confirmed pelvic nodal metastases that had not been detected on preoperative computed tomography were identified. CONCLUSION These early results show the potential of 99mTc-C595 immunoscintigraphy for staging bladder cancer. A larger study is needed to fully evaluate the technique.
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Affiliation(s)
- M S Simms
- Department of Urology, City Hospital Nottingham, UK.
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Murray A, Smith RG, Brady K, Williams S, Badley RA, Price MR. Generation and refinement of peptide mimetic ligands for paratope-specific purification of monoclonal antibodies. Anal Biochem 2001; 296:9-17. [PMID: 11520027 DOI: 10.1006/abio.2001.5235] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Paratope-specific purification of antibodies has distinct advantages over conventional methods of antibody purification with respect to its capacity to isolate product of high purity and immunoreactivity. The present report addresses the problems of identifying peptide ligands for the purification of antibodies reactive with nonprotein antigens. Using an anti-steroid antibody as the model, a lead sequence that bound antibody was identified from a peptide phage display library. The minimum binding unit in this sequence was deduced using a series of truncated peptides synthesized on the heads of polyethylene pins. Replacement Net analysis of the minimum binding unit identified peptides with increased affinity for the antibody. The affinity-matured peptide mimotope bound antibody in solution. By molecular modeling the peptide was superimposable onto estrone-3-glucuronide localized in the crystal structure of the antibody binding pocket. In order to resolve problems of presentation posed by the reversal of orientation of the peptide on the affinity matrix compared with the pins, the mimotope peptide was synthesized in reverse sequence using d-amino acids. The resulting affinity matrix was effective for the purification of antibody. Eluted product demonstrated molecular homogeneity and high immunoreactivity. It is concluded that the combination of biological and chemical library techniques described provides a method for the generation and affinity maturation of mimotopes for antibodies against nonprotein antigens.
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Affiliation(s)
- A Murray
- Cancer Research Laboratories, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
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Denton G, Murray A, Price MR, Levison PR. Direct isolation of monoclonal antibodies from tissue culture supernatant using the cation-exchange cellulose Express-Ion S. J Chromatogr A 2001; 908:223-34. [PMID: 11218125 DOI: 10.1016/s0021-9673(00)00834-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The chromatography of the murine hybridoma cell C595/102 culture supernatant expressing the therapeutic monoclonal antibody C595, on the cation-exchange cellulose Whatman Express-Ion Exchanger S has been investigated. Initial method scouting studies using purified C595 in 1-ml mini columns demonstrated that binding capacity and binding efficiency were dependent not only on decreasing pH but also on the buffer salts used to prepare the mobile phase. Under optimised conditions of 0.1 M sodium acetate buffer, pH 5.0, we were able to separate purified C595 from BSA, the major contaminant in tissue culture fluid. Under these conditions immunoreactive C595 could be isolated directly from tissue culture supernatant. A scale-down study was carried out using a 25-ml column operated at a flow-rate of 150 cm/h which also yielded purified immunoreactive antibody. This procedure should now be suitable for scale-up.
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Affiliation(s)
- G Denton
- Cancer Research Laboratories, School of Pharmaceutical Sciences, University of Nottingham, University Park, UK
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Hughes OD, Perkins AC, Frier M, Wastie ML, Denton G, Price MR, Denley H, Bishop MC. Imaging for staging bladder cancer: a clinical study of intravenous 111indium-labelled anti-MUC1 mucin monoclonal antibody C595. BJU Int 2001; 87:39-46. [PMID: 11121991 DOI: 10.1046/j.1464-410x.2001.00985.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate the clinical application of an 111In-labelled anti-MUC1 mucin monoclonal antibody (mAb) imaging for staging invasive bladder cancer. PATIENTS AND METHODS Indirect immunohistochemistry was used to confirm the expression of the MUC1 target antigen by metastatic tumours. Twelve patients with bladder cancer (two with superficial and 10 with locally invasive/metastatic disease) underwent planar gamma-scintigraphy 48 h after an intravenous injection with 111In-labelled anti-MUC1 mucin mAb C595. RESULTS No bladder uptake was detected in the two patients with superficial disease, but scintigraphy showed primary and recurrent bladder tumours and metastases in nine of the remaining 10 patients with invasive disease. In three patients additional staging information was obtained from the mAb imaging which would have altered patient management. There were no reported side-effects. CONCLUSION This study confirmed the ability of the mAb technique to detect both primary and recurrent invasive bladder tumours and distant metastases. Some lesions shown by mAb imaging were not detected by other methods. The use of mAb imaging has the potential to improve clinical staging and assist in selecting those patients most likely to benefit from radical therapy.
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Affiliation(s)
- O D Hughes
- Department of Urology, City Hospital, Nottingham, UK
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