1
|
Fung EK, Zanzonico PB. Monitoring the biodistribution of radiolabeled therapeutics in mice. Methods Cell Biol 2023; 180:93-111. [PMID: 37890935 DOI: 10.1016/bs.mcb.2023.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/29/2023]
Abstract
Radiopharmaceutical therapy is a rapidly growing field for the treatment of cancer due to its high specificity and ability to target individual affected cells. A key component of the pre-clinical development of a new therapeutic radiopharmaceutical is the determination of its time-dependent distribution in tumors, normal tissues, and the whole body in mouse tumor models. Here, we provide an overview of the available instrumentation for the novice in radiation measurement. We also detail the methodology for assessing distribution and kinetics of a radiopharmaceutical and calculating radiation absorbed dose in mice using a gamma counter or a PET or SPECT camera.
Collapse
Affiliation(s)
- Edward K Fung
- Department of Radiology, Weill Cornell Medicine, New York, NY, United States.
| | - Pat B Zanzonico
- Department of Medical Physics, Memorial Sloan Kettering Medical Center, New York, NY, United States
| |
Collapse
|
2
|
Fan Z, Zhou P, Jin B, Li G, Feng L, Zhuang C, Wang S. Recent therapeutics in hepatocellular carcinoma. Am J Cancer Res 2023; 13:261-275. [PMID: 36777510 PMCID: PMC9906068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 12/26/2022] [Indexed: 02/14/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is a malignant tumor of hepatocytes. It is a common malignant tumor of the digestive system that often has initially hidden presentation followed by rapid progression. There are no obvious symptoms in the early stage of HCC. When diagnosed, most patients have locally advanced tumor or distant metastasis; therefore, HCC is difficult to treat and only supportive and symptomatic treatment is adopted. The prognosis is poor and survival time is short. How to effectively treat HCC is important clinically. In recent years, advances in medical technology have resulted in comprehensive treatment methods based on surgery.
Collapse
Affiliation(s)
- Zhe Fan
- Department of General Surgery & Department of Central Laboratory, The Third People’s Hospital of Dalian, Dalian Medical UniversityDalian, Liaoning, China
| | - Pengcheng Zhou
- School of Medicine, Southeast UniversityNanjing, Jiangsu, China
| | - Binghui Jin
- Department of General Surgery & Department of Central Laboratory, The Third People’s Hospital of Dalian, Dalian Medical UniversityDalian, Liaoning, China
| | - Guangyao Li
- Department of General Surgery & Department of Central Laboratory, The Third People’s Hospital of Dalian, Dalian Medical UniversityDalian, Liaoning, China
| | - Lu Feng
- Department of Pathology, The First Affiliated Hospital of Dalian Medical UniversityDalian, Liaoning, China
| | - Chengjun Zhuang
- Department of Critical Care Medicine, The Second Affiliated Hospital of Dalian Medical UniversityDalian, Liaoning, China
| | - Shuang Wang
- Department of Endocrinology, The Second Affiliated Hospital of Dalian Medical UniversityDalian, Liaoning, China
| |
Collapse
|
3
|
Petrik J, Verbanac D, Fabijanec M, Hulina-Tomašković A, Čeri A, Somborac-Bačura A, Petlevski R, Grdić Rajković M, Rumora L, Krušlin B, Štefanović M, Ljubičić N, Baršić N, Hanžek A, Bočkor L, Ćelap I, Demirović A, Barišić K. Circulating Tumor Cells in Colorectal Cancer: Detection Systems and Clinical Utility. Int J Mol Sci 2022; 23:13582. [PMID: 36362369 PMCID: PMC9654465 DOI: 10.3390/ijms232113582] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/26/2022] [Accepted: 10/31/2022] [Indexed: 09/29/2023] Open
Abstract
Colorectal cancer (CRC) is the third most common cancer worldwide. The high mortality from CRC is mainly related to metastasis affecting distant organs and their function. Dissemination of tumor cells from the primary tumor and hematogeneous spread are considered crucial in the formation of tumor metastases. The analysis of circulating tumor cells (CTCs) and CTC clusters in the blood can be used for the early detection of invasive cancer. Moreover, CTCs have a prognostic significance in the monitoring of a malignant disease or the response to chemotherapy. This work presents an overview of the research conducted on CTCs with the aim of finding suitable detection systems and assessing the possibility of clinical applications in patients with CRC.
Collapse
Affiliation(s)
- József Petrik
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Donatella Verbanac
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Marija Fabijanec
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Andrea Hulina-Tomašković
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Andrea Čeri
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Anita Somborac-Bačura
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Roberta Petlevski
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Marija Grdić Rajković
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Lada Rumora
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Božo Krušlin
- School of Medicine, University of Zagreb, Šalata 3, 10000 Zagreb, Croatia
- Department of Pathology and Cytology “Ljudevit Jurak”, University Hospital Centre “Sestre milosrdnice”, University of Zagreb, Vinogradska 29, 10000 Zagreb, Croatia
| | - Mario Štefanović
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
- Department of Clinical Chemistry, University Hospital Centre “Sestre milosrdnice”, University of Zagreb, Vinogradska 29, 10000 Zagreb, Croatia
| | - Neven Ljubičić
- School of Medicine, University of Zagreb, Šalata 3, 10000 Zagreb, Croatia
- Department of Internal Medicine, University Hospital Centre “Sestre milosrdnice”, Division of Gastroenterology and Hepatology, University of Zagreb, Vinogradska 29, 10000 Zagreb, Croatia
- School of Dental Medicine, University of Zagreb, Gundulićeva 5, 10000 Zagreb, Croatia
| | - Neven Baršić
- School of Medicine, University of Zagreb, Šalata 3, 10000 Zagreb, Croatia
- Department of Internal Medicine, University Hospital Centre “Sestre milosrdnice”, Division of Gastroenterology and Hepatology, University of Zagreb, Vinogradska 29, 10000 Zagreb, Croatia
| | - Antonija Hanžek
- UPR CHROME, University of Nimes, 7 Place Gabriel Peri, 30000 Nîmes, France
| | - Luka Bočkor
- Centre for Applied Bioanthropology, Institute for Anthropological Research, Ljudevita Gaja 32, 10000 Zagreb, Croatia
| | - Ivana Ćelap
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| | - Alma Demirović
- Department of Pathology and Cytology “Ljudevit Jurak”, University Hospital Centre “Sestre milosrdnice”, University of Zagreb, Vinogradska 29, 10000 Zagreb, Croatia
- School of Dental Medicine, University of Zagreb, Gundulićeva 5, 10000 Zagreb, Croatia
| | - Karmela Barišić
- Department of Medical Biochemistry and Hematology, Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, 10000 Zagreb, Croatia
| |
Collapse
|
4
|
Bodei L, Herrmann K, Schöder H, Scott AM, Lewis JS. Radiotheranostics in oncology: current challenges and emerging opportunities. Nat Rev Clin Oncol 2022; 19:534-550. [PMID: 35725926 PMCID: PMC10585450 DOI: 10.1038/s41571-022-00652-y] [Citation(s) in RCA: 95] [Impact Index Per Article: 47.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2022] [Indexed: 12/20/2022]
Abstract
Structural imaging remains an essential component of diagnosis, staging and response assessment in patients with cancer; however, as clinicians increasingly seek to noninvasively investigate tumour phenotypes and evaluate functional and molecular responses to therapy, theranostics - the combination of diagnostic imaging with targeted therapy - is becoming more widely implemented. The field of radiotheranostics, which is the focus of this Review, combines molecular imaging (primarily PET and SPECT) with targeted radionuclide therapy, which involves the use of small molecules, peptides and/or antibodies as carriers for therapeutic radionuclides, typically those emitting α-, β- or auger-radiation. The exponential, global expansion of radiotheranostics in oncology stems from its potential to target and eliminate tumour cells with minimal adverse effects, owing to a mechanism of action that differs distinctly from that of most other systemic therapies. Currently, an enormous opportunity exists to expand the number of patients who can benefit from this technology, to address the urgent needs of many thousands of patients across the world. In this Review, we describe the clinical experience with established radiotheranostics as well as novel areas of research and various barriers to progress.
Collapse
Affiliation(s)
- Lisa Bodei
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Department of Radiology, Weill Cornell Medical School, New York, NY, USA
| | - Ken Herrmann
- German Cancer Consortium, University Hospital Essen, Essen, Germany
- Department of Nuclear Medicine, University of Duisburg-Essen, University Hospital Essen, Essen, Germany
| | - Heiko Schöder
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Department of Radiology, Weill Cornell Medical School, New York, NY, USA
| | - Andrew M Scott
- Tumour Targeting Laboratory, Olivia Newton-John Cancer Research Institute, Melbourne, Victoria, Australia
- Department of Molecular Imaging and Therapy, Austin Health, Melbourne, Victoria, Australia
- School of Cancer Medicine, La Trobe University, Melbourne, Victoria, Australia
- Department of Medicine, University of Melbourne, Melbourne, Victoria, Australia
| | - Jason S Lewis
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
- Department of Radiology, Weill Cornell Medical School, New York, NY, USA.
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
- Department of Pharmacology, Weill Cornell Medical School, New York, NY, USA.
| |
Collapse
|
5
|
Hegi-Johnson F, Rudd S, Hicks RJ, De Ruysscher D, Trapani JA, John T, Donnelly P, Blyth B, Hanna G, Everitt S, Roselt P, MacManus MP. Imaging immunity in patients with cancer using positron emission tomography. NPJ Precis Oncol 2022; 6:24. [PMID: 35393508 PMCID: PMC8989882 DOI: 10.1038/s41698-022-00263-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 02/24/2022] [Indexed: 12/26/2022] Open
Abstract
Immune checkpoint inhibitors and related molecules can achieve tumour regression, and even prolonged survival, for a subset of cancer patients with an otherwise dire prognosis. However, it remains unclear why some patients respond to immunotherapy and others do not. PET imaging has the potential to characterise the spatial and temporal heterogeneity of both immunotherapy target molecules and the tumor immune microenvironment, suggesting a tantalising vision of personally-adapted immunomodulatory treatment regimens. Personalised combinations of immunotherapy with local therapies and other systemic therapies, would be informed by immune imaging and subsequently modified in accordance with therapeutically induced immune environmental changes. An ideal PET imaging biomarker would facilitate the choice of initial therapy and would permit sequential imaging in time-frames that could provide actionable information to guide subsequent therapy. Such imaging should provide either prognostic or predictive measures of responsiveness relevant to key immunotherapy types but, most importantly, guide key decisions on initiation, continuation, change or cessation of treatment to reduce the cost and morbidity of treatment while enhancing survival outcomes. We survey the current literature, focusing on clinically relevant immune checkpoint immunotherapies, for which novel PET tracers are being developed, and discuss what steps are needed to make this vision a reality.
Collapse
Affiliation(s)
- Fiona Hegi-Johnson
- Department of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- The Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Stacey Rudd
- Department of Chemistry, University of Melbourne, Melbourne, VIC, Australia
| | - Rodney J Hicks
- The Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
- Department of Cancer Imaging, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| | - Dirk De Ruysscher
- Department of Radiation Oncology (Maastro), GROW School for Oncology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Joseph A Trapani
- The Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| | - Thomas John
- The Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| | - Paul Donnelly
- Department of Chemistry, University of Melbourne, Melbourne, VIC, Australia
| | - Benjamin Blyth
- The Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Gerard Hanna
- Department of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- The Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Sarah Everitt
- Department of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- The Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Peter Roselt
- Department of Cancer Imaging, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| | - Michael P MacManus
- Department of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.
- The Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia.
| |
Collapse
|
6
|
Chandler CS, Bell MM, Chung SK, Veach DR, Fung EK, Punzalan B, Burnes Vargas D, Patel M, Xu H, Guo HF, Santich BH, Zanzonico PB, Monette S, Nash GM, Cercek A, Jungbluth A, Pandit-Taskar N, Cheung NKV, Larson SM, Cheal SM. Intraperitoneal Pretargeted Radioimmunotherapy for Colorectal Peritoneal Carcinomatosis. Mol Cancer Ther 2022; 21:125-137. [PMID: 34667111 PMCID: PMC9157533 DOI: 10.1158/1535-7163.mct-21-0353] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/22/2021] [Accepted: 10/15/2021] [Indexed: 11/16/2022]
Abstract
Peritoneal carcinomatosis (PC) is considered incurable, and more effective therapies are needed. Herein we test the hypothesis that GPA33-directed intracompartmental pretargeted radioimmunotherapy (PRIT) can cure colorectal peritoneal carcinomatosis. Nude mice were implanted intraperitoneally with luciferase-transduced GPA33-expressing SW1222 cells for aggressive peritoneal carcinomatosis (e.g., resected tumor mass 0.369 ± 0.246 g; n = 17 on day 29). For GPA33-PRIT, we administered intraperitoneally a high-affinity anti-GPA33/anti-DOTA bispecific antibody (BsAb), followed by clearing agent (intravenous), and lutetium-177 (Lu-177) or yttrium-86 (Y-86) radiolabeled DOTA-radiohapten (intraperitoneal) for beta/gamma-emitter therapy and PET imaging, respectively. The DOTA-radiohaptens were prepared from S-2-(4-aminobenzyl)-1,4,7, 10-tetraazacyclododecane tetraacetic acid chelate (DOTA-Bn). Efficacy and toxicity of single- versus three-cycle therapy were evaluated in mice 26-27 days post-tumor implantation. Single-cycle treatment ([177Lu]LuDOTA-Bn 111 MBq; tumor dose: 4,992 cGy) significantly prolonged median survival (MS) approximately 2-fold to 84.5 days in comparison with controls (P = 0.007). With three-cycle therapy (once weekly, total 333 MBq; tumor dose: 14,975 cGy), 6/8 (75%) survived long-term (MS > 183 days). Furthermore, for these treated long-term survivors, 1 mouse was completely disease free (microscopic "cure") at necropsy; the others showed stabilized disease, which was detectable during PET-CT using [86Y]DOTA-Bn. Treatment controls had MS ranging from 42-52.5 days (P < 0.001) and 19/20 mice succumbed to progressive intraperitoneal disease by 69 days. Multi-cycle GPA33 DOTA-PRIT significantly prolongs survival with reversible myelosuppression and no chronic marrow (929 cGy to blood) or kidney (982 cGy) radiotoxicity, with therapeutic indices of 12 for blood and 12 for kidneys. MTD was not reached.
Collapse
Affiliation(s)
| | - Meghan M Bell
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Sebastian K Chung
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Darren R Veach
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
- Department of Radiology, Weill Cornell Medicine, New York, New York
| | - Edward K Fung
- Department of Radiology, Weill Cornell Medicine, New York, New York
| | - Blesida Punzalan
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | | | - Mitesh Patel
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Hong Xu
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Hong-Fen Guo
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Brian H Santich
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Pat B Zanzonico
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Sébastien Monette
- Laboratory of Comparative Pathology, Memorial Sloan Kettering Cancer Center, Weill Cornell Medicine, and The Rockefeller University, New York, New York
| | - Garrett M Nash
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Andrea Cercek
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Achim Jungbluth
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Neeta Pandit-Taskar
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Nai Kong V Cheung
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Steven M Larson
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Sarah M Cheal
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York.
| |
Collapse
|
7
|
Kennedy J, Chicheportiche A, Keidar Z. Quantitative SPECT/CT for dosimetry of peptide receptor radionuclide therapy. Semin Nucl Med 2021; 52:229-242. [PMID: 34911637 DOI: 10.1053/j.semnuclmed.2021.11.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Neuroendocrine tumors (NETs) are uncommon malignancies of increasing incidence and prevalence. As these slow growing tumors usually overexpress somatostatin receptors (SSTRs), the use of 68Ga-DOTA-peptides (gallium-68 chelated with dodecane tetra-acetic acid to somatostatin), which bind to the SSTRs, allows for PET based imaging and selection of patients for peptide receptor radionuclide therapy (PRRT). PRRT with radiolabeled somatostatin analogues such as 177Lu-DOTATATE (lutetium-177-[DOTA,Tyr3]-octreotate), is mainly used for the treatment of metastatic or inoperable NETs. However, PRRT is generally administered at a fixed injected activity in order not to exceed dose limits in critical organs, which is suboptimal given the variability in radiopharmaceutical uptake among patients. Advances in SPECT (single photon emission computed tomography) imaging enable the absolute quantitative measure of the true radiopharmaceutical distribution providing for PRRT dosimetry in each patient. Personalized PRRT based on patient-specific dosimetry could improve therapeutic efficacy by optimizing effective tumor absorbed dose while limiting treatment related radiotoxicity.
Collapse
Affiliation(s)
- John Kennedy
- Department of Nuclear Medicine, Rambam Health Care Campus, Haifa, Israel; B. Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.
| | - Alexandre Chicheportiche
- Department of Nuclear Medicine and Biophysics, Hadassah Medical Organization and Faculty of Medicine, Hebrew University of Jerusalem, Israel
| | - Zohar Keidar
- Department of Nuclear Medicine, Rambam Health Care Campus, Haifa, Israel; B. Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| |
Collapse
|
8
|
Dacek MM, Veach DR, Cheal SM, Carter LM, McDevitt MR, Punzalan B, Burnes Vargas D, Kubik TZ, Monette S, Santich BH, Yang G, Ouerfelli O, Kesner AL, Cheung NKV, Scheinberg DA, Larson SM, Krebs S. Engineered Cells as a Test Platform for Radiohaptens in Pretargeted Imaging and Radioimmunotherapy Applications. Bioconjug Chem 2021; 32:649-654. [PMID: 33819023 DOI: 10.1021/acs.bioconjchem.0c00595] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pretargeted imaging and radioimmunotherapy approaches are designed to have superior targeting properties over directly targeted antibodies but impose more complex pharmacology, which hinders efforts to optimize the ligands prior to human applications. Human embryonic kidney 293T cells expressing the humanized single-chain variable fragment (scFv) C825 (huC825) with high-affinity for DOTA-haptens (293T-huC825) in a transmembrane-anchored format eliminated the requirement to use other pretargeting reagents and provided a simplified, accelerated assay of radiohapten capture while offering normalized cell surface expression of the molecular target of interest. Using binding assays, ex vivo biodistribution, and in vivo imaging, we demonstrated that radiohaptens based on benzyl-DOTA and a second generation "Proteus" DOTA-platform effectively and specifically engaged membrane-bound huC825, achieving favorable tumor-to-normal tissue uptake ratios in mice. Furthermore, [86Y]Y-DOTA-Bn predicted absorbed dose to critical organs with reasonable accuracy for both [177Lu]Lu-DOTA-Bn and [225Ac]Ac-Pr, which highlights the benefit of a dosimetry-based treatment approach.
Collapse
Affiliation(s)
- Megan M Dacek
- Molecular Pharmacology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States.,Department of Pharmacology, Weill Cornell Medical College, New York, New York 10065, United States
| | - Darren R Veach
- Molecular Imaging and Therapy Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States.,Radiochemistry and Imaging Sciences Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States.,Department of Radiology, Weill Cornell Medical College, New York, New York 10065, United States
| | - Sarah M Cheal
- Molecular Pharmacology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Lukas M Carter
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Michael R McDevitt
- Molecular Imaging and Therapy Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States.,Department of Radiology, Weill Cornell Medical College, New York, New York 10065, United States
| | - Blesida Punzalan
- Molecular Pharmacology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Daniela Burnes Vargas
- Molecular Pharmacology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Thomas Z Kubik
- Molecular Imaging and Therapy Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Sebastien Monette
- Tri-Institutional Laboratory of Comparative Pathology, Memorial Sloan Kettering Cancer Center, Weill Cornell Medicine, and The Rockefeller University, New York, New York 10065, United States
| | - Brian H Santich
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Guangbin Yang
- Organic Synthesis Core Facility, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Ouathek Ouerfelli
- Organic Synthesis Core Facility, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Adam L Kesner
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Nai-Kong V Cheung
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - David A Scheinberg
- Molecular Pharmacology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States.,Department of Pharmacology, Weill Cornell Medical College, New York, New York 10065, United States
| | - Steven M Larson
- Molecular Pharmacology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States.,Molecular Imaging and Therapy Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States.,Department of Radiology, Weill Cornell Medical College, New York, New York 10065, United States
| | - Simone Krebs
- Molecular Imaging and Therapy Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States.,Department of Radiology, Weill Cornell Medical College, New York, New York 10065, United States
| |
Collapse
|
9
|
Ghani S, Bahrami S, Rafiee B, Eyvazi S, Yarian F, Ahangarzadeh S, Khalili S, Shahzamani K, Jafarisani M, Bandehpour M, Kazemi B. Recent developments in antibody derivatives against colorectal cancer; A review. Life Sci 2020; 265:118791. [PMID: 33220288 DOI: 10.1016/j.lfs.2020.118791] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 10/10/2020] [Accepted: 11/14/2020] [Indexed: 12/16/2022]
Abstract
Colorectal cancer (CRC) is the fourth most common cause of cancer and mortality worldwide and is the third most common cancer in men and women. Surgery, radiotherapy, and chemotherapy are conventionally used for the treatment of colorectal cancer. However, these methods are associated with various side effects on normal cells. Thus, new studies are moving towards more effective and non-invasive methods for treatment of colorectal cancer. Targeted therapy of CRC is a promising new approach to enhance the efficiency and decrease the toxicity of the treatment. In targeted therapy of CRC, antibody fragments can directly inhibit tumor cell growth and proliferation. They also can act as an ideal carrier for targeted delivery of anticancer drugs. In the present study, the structure and function of different formats of antibody fragments, immune-targeted therapy of CRC using antibody fragments will be discussed.
Collapse
Affiliation(s)
- Sepideh Ghani
- Student Research Committee, Department of Medical Biotechnology, School of Advanced Technology in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Cellular & Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Samira Bahrami
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Behnam Rafiee
- Department of Pathobiology, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
| | - Shirin Eyvazi
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fatemeh Yarian
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Cellular & Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Shahrzad Ahangarzadeh
- Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Saeed Khalili
- Department of Biology Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran
| | - Kiana Shahzamani
- Isfahan Gastroenterology and Hepatology Research Center (IGHRC), Isfahan University of Medical Sciences, Isfahan, Iran
| | - Moslem Jafarisani
- Clinical Biochemistry, Cancer Prevention Research Center, Shahroud university of Medical Sciences, Shahroud, Iran
| | - Mojgan Bandehpour
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Cellular & Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Bahram Kazemi
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Cellular & Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| |
Collapse
|
10
|
Cheal SM, McDevitt MR, Santich BH, Patel M, Yang G, Fung EK, Veach DR, Bell M, Ahad A, Vargas DB, Punzalan B, Pillarsetty NVK, Xu H, Guo HF, Monette S, Michel AO, Piersigilli A, Scheinberg DA, Ouerfelli O, Cheung NKV, Larson SM. Alpha radioimmunotherapy using 225Ac-proteus-DOTA for solid tumors - safety at curative doses. Theranostics 2020; 10:11359-11375. [PMID: 33052220 PMCID: PMC7546012 DOI: 10.7150/thno.48810] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 07/29/2020] [Indexed: 02/07/2023] Open
Abstract
This is the initial report of an α-based pre-targeted radioimmunotherapy (PRIT) using 225Ac and its theranostic pair, 111In. We call our novel tumor-targeting DOTA-hapten PRIT system "proteus-DOTA" or "Pr." Herein we report the first results of radiochemistry development, radiopharmacology, and stoichiometry of tumor antigen binding, including the role of specific activity, anti-tumor efficacy, and normal tissue toxicity with the Pr-PRIT approach (as α-DOTA-PRIT). A series of α-DOTA-PRIT therapy studies were performed in three solid human cancer xenograft models of colorectal cancer (GPA33), breast cancer (HER2), and neuroblastoma (GD2), including evaluation of chronic toxicity at ~20 weeks of select survivors. Methods: Preliminary biodistribution experiments in SW1222 tumor-bearing mice revealed that 225Ac could not be efficiently pretargeted with current DOTA-Bn hapten utilized for 177Lu or 90Y, leading to poor tumor uptake in vivo. Therefore, we synthesized Pr consisting of an empty DOTA-chelate for 225Ac, tethered via a short polyethylene glycol linker to a lutetium-complexed DOTA for picomolar anti-DOTA chelate single-chain variable fragment (scFv) binding. Pr was radiolabeled with 225Ac and its imaging surrogate, 111In. In vitro studies verified anti-DOTA scFv recognition of [225Ac]Pr, and in vivo biodistribution and clearance studies were performed to evaluate hapten suitability and in vivo targeting efficiency. Results: Intravenously (i.v.) administered 225Ac- or 111In-radiolabeled Pr in mice showed rapid renal clearance and minimal normal tissue retention. In vivo pretargeting studies show high tumor accumulation of Pr (16.71 ± 5.11 %IA/g or 13.19 ± 3.88 %IA/g at 24 h p.i. for [225Ac]Pr and [111In]Pr, respectively) and relatively low uptake in normal tissues (all average ≤ 1.4 %IA/g at 24 h p.i.). Maximum tolerated dose (MTD) was not reached for either [225Ac]Pr alone or pretargeted [225Ac]Pr at administered activities up to 296 kBq/mouse. Single-cycle treatment consisting of α-DOTA-PRIT with either huA33-C825 bispecific anti-tumor/anti-DOTA-hapten antibody (BsAb), anti-HER2-C825 BsAb, or hu3F8-C825 BsAb for targeting GPA33, HER2, or GD2, respectively, was highly effective. In the GPA33 model, no complete responses (CRs) were observed but prolonged overall survival of treated animals was 42 d for α-DOTA-PRIT vs. 25 d for [225Ac]Pr only (P < 0.0001); for GD2, CRs (7/7, 100%) and histologic cures (4/7, 57%); and for HER2, CRs (7/19, 37%) and histologic cures (10/19, 56%) with no acute or chronic toxicity. Conclusions: [225Ac]Pr and its imaging biomarker [111In]Pr demonstrate optimal radiopharmacologic behavior for theranostic applications of α-DOTA-PRIT. For this initial evaluation of efficacy and toxicity, single-cycle treatment regimens were performed in all three systems. Histologic toxicity was not observed, so MTD was not observed. Prolonged overall survival, CRs, and histologic cures were observed in treated animals. In comparison to RIT with anti-tumor IgG antibodies, [225Ac]Pr has a much improved safety profile. Ultimately, these data will be used to guide clinical development of toxicity and efficacy studies of [225Ac]Pr, with the goal of delivering massive lethal doses of radiation to achieve a high probability of cure without toxicity.
Collapse
|
11
|
Wei W, Liu Q, Jiang D, Zhao H, Kutyreff CJ, Engle JW, Liu J, Cai W. Tissue Factor-Targeted ImmunoPET Imaging and Radioimmunotherapy of Anaplastic Thyroid Cancer. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1903595. [PMID: 32670751 PMCID: PMC7341097 DOI: 10.1002/advs.201903595] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 04/04/2020] [Indexed: 05/30/2023]
Abstract
Anaplastic thyroid cancer (ATC) is the most aggressive subtype of thyroid cancers with a dismal prognosis. It is aimed to explore a new biomarker and devise a marker-dependent theranostic pair for ATC. Flow cytometry is used to determine tissue factor (TF) expression in thyroid cancer cell lines. ALT-836, a TF-specific monoclonal antibody, is radiolabeled with 64Cu to develop 64Cu-NOTA-ALT-836. The diagnostic utility is assessed by immuno-positron emission tomography (immunoPET) imaging in ATC models. To facilitate total surgical removal of orthotopic ATCs, a near-infrared fluorescent imaging probe IRDye 800CW-ALT-836 is designed. As the therapeutic component, 131I-ALT-836 is further developed and the radioimmunotherapy (RIT) efficacy of this agent is interrogated in orthotopic ATC models. The results demonstrate that TF is highly expressed on the ATC cell line THJ-16T. 64Cu-NOTA-ALT-836 immunoPET imaging clearly delineates both subcutaneous and orthotopic ATCs, with a peak tumor uptake of 19.93 ± 2.17% ID per g (n = 3) and 37.20 ± 1.71% ID per g (n = 3), respectively. Fluorescent imaging with IRDye 800CW-ALT-836 facilitates the total resection of orthotopic ATCs. Moreover, 131I-ALT-836 RIT prolongs the survival of ATC-bearing mice. Taken together, TF is a promising marker for ATC and successive use of 64Cu-NOTA-ALT-836 and 131I-ALT-836 can realize precise management of ATC.
Collapse
Affiliation(s)
- Weijun Wei
- Department of Nuclear MedicineInstitute of Clinical Nuclear MedicineRenji Hospital, School of MedicineShanghai Jiao Tong University State Key Laboratory of Oncogenes and Related GenesShanghai Cancer Institute1630 Dongfang RdShanghai200127China
- Departments of Radiology and Medical PhysicsUniversity of Wisconsin–MadisonMadisonWI53705USA
| | - Qiufang Liu
- Department of Nuclear MedicineFudan University Shanghai Cancer CenterFudan University270 Dongan RdShanghai200032China
| | - Dawei Jiang
- Departments of Radiology and Medical PhysicsUniversity of Wisconsin–MadisonMadisonWI53705USA
| | - Haitao Zhao
- Department of Nuclear MedicineInstitute of Clinical Nuclear MedicineRenji Hospital, School of MedicineShanghai Jiao Tong University State Key Laboratory of Oncogenes and Related GenesShanghai Cancer Institute1630 Dongfang RdShanghai200127China
| | - Christopher J. Kutyreff
- Departments of Radiology and Medical PhysicsUniversity of Wisconsin–MadisonMadisonWI53705USA
| | - Jonathan W. Engle
- Departments of Radiology and Medical PhysicsUniversity of Wisconsin–MadisonMadisonWI53705USA
| | - Jianjun Liu
- Department of Nuclear MedicineInstitute of Clinical Nuclear MedicineRenji Hospital, School of MedicineShanghai Jiao Tong University State Key Laboratory of Oncogenes and Related GenesShanghai Cancer Institute1630 Dongfang RdShanghai200127China
| | - Weibo Cai
- Departments of Radiology and Medical PhysicsUniversity of Wisconsin–MadisonMadisonWI53705USA
- University of Wisconsin Carbone Cancer CenterMadisonWI53705USA
| |
Collapse
|
12
|
Balibegloo M, Rezaei N. Development and clinical application of bispecific antibody in the treatment of colorectal cancer. Expert Rev Clin Immunol 2020; 16:689-709. [PMID: 32536227 DOI: 10.1080/1744666x.2020.1783249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Treatment of colorectal cancer as one of the most commonly diagnosed and a frequent cause of cancer-related deaths is of great challenges in health-related issues. AREAS COVERED Immunotherapy is the fourth pillar of cancer treatment which provides more novel therapeutic options with expanding investigational potentials. One of the modalities in immunotherapy is the use of bispecific antibodies. Despite demonstrating many promising roles, it still needs more advanced studies to identify the actual pros and cons. In this review, the application of bispecific antibody in the treatment of colorectal cancer has been explained, based on preclinical and clinical studies. The literature search was conducted mainly through PubMed in June and September 2019. EXPERT OPINION Bispecific antibody is in its early stages in colorectal cancer treatment, requiring modern technologies in manufacturing, better biomarkers and more specific target antigens, more studies on individual genetic variations, and conducting later phase clinical trials and systematic reviews to achieve better survival benefits.
Collapse
Affiliation(s)
- Maryam Balibegloo
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences , Tehran, Iran.,Cancer Immunology Project (CIP), Universal Scientific Education & Research Network (USERN) , Tehran, Iran
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences , Tehran, Iran.,Department of Immunology, School of Medicine, Tehran University of Medical Sciences , Tehran, Iran.,Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education & Research Network (USERN) , Tehran, Iran
| |
Collapse
|
13
|
Wei D, Tao Z, Shi Q, Wang L, Liu L, She T, Yi Q, Wen X, Liu L, Li S, Yang H, Jiang X. Selective Photokilling of Colorectal Tumors by Near-Infrared Photoimmunotherapy with a GPA33-Targeted Single-Chain Antibody Variable Fragment Conjugate. Mol Pharm 2020; 17:2508-2517. [PMID: 32396000 DOI: 10.1021/acs.molpharmaceut.0c00210] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Antibody-based near-infrared photoimmunotherapy (NIR-PIT) is an attractive strategy for cancer treatment. Tumor cells can be selectively and efficiently killed by the targeted delivery of an antibody-photoabsorber complex followed by exposure to NIR light. Glycoprotein A33 antigen (GPA33) is highly expressed in most human colorectal cancers (CRCs) and is an ideal diagnostic and therapeutic target. We previously produced a single-chain fragment of a variable antibody against GPA33 (A33scFv antibody). Here, we investigate the efficacy of NIR-PIT by combining A33scFv with the NIR photoabsorber IR700 (A33scFv-IR700). In vitro, recombinant A33scFv displayed specific binding and delivery of an NIR dye to GPA33-positive tumor cells. Furthermore, A33scFv-IR700-mediated NIR-PIT was successful in rapidly and specifically killing GPA33-positive colorectal tumor cells. NIR-PIT treatment induced the release of lactate dehydrogenase from tumor cells, followed by cell necrosis, rather than apoptosis, through the promotion of reactive oxygen species accumulation in tumor cells. In mice bearing LS174T tumor grafts, A33scFv selectively accumulated in GPA33-positive tumors. Following only a single injection of the conjugate and subsequent illumination, A33scFv-IR700-mediated NIR-PIT induced a significant increase in therapeutic response in LS174T-tumor mice compared with that in the non-NIR-PIT groups (p < 0.001). Because the GPA33 antigen is specifically expressed in CRC tumors, A33scFv-IR700 might be a promising antibody fragment-photoabsorber conjugate for NIR-PIT of CRC.
Collapse
Affiliation(s)
- Danfeng Wei
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu 610041, China.,Medical Research Center, The Third People's Hospital of Chengdu, The Second Affiliated Chengdu Clinical College of Chongqing Medical University, Chengdu 610031, China.,Key Laboratory of Transplant Engineering and Immunology, Regenerative Medical Research Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Ze Tao
- Key Laboratory of Transplant Engineering and Immunology, Regenerative Medical Research Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Qiuxiao Shi
- Key Laboratory of Transplant Engineering and Immunology, Regenerative Medical Research Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Lijun Wang
- Department of Ophthalmology, The Third People's Hospital of Chengdu, The Second Affiliated Chengdu Clinical College of Chongqing Medical University, Chengdu 610031, China
| | - Lei Liu
- Medical Research Center, The Third People's Hospital of Chengdu, The Second Affiliated Chengdu Clinical College of Chongqing Medical University, Chengdu 610031, China
| | - Tianshan She
- Key Laboratory of Transplant Engineering and Immunology, Regenerative Medical Research Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Qin Yi
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xiang Wen
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Lian Liu
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Shengfu Li
- Key Laboratory of Transplant Engineering and Immunology, Regenerative Medical Research Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Hao Yang
- Key Laboratory of Transplant Engineering and Immunology, Regenerative Medical Research Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xian Jiang
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu 610041, China
| |
Collapse
|
14
|
Abstract
Immuno-positron emission tomography (immunoPET) is a paradigm-shifting molecular imaging modality combining the superior targeting specificity of monoclonal antibody (mAb) and the inherent sensitivity of PET technique. A variety of radionuclides and mAbs have been exploited to develop immunoPET probes, which has been driven by the development and optimization of radiochemistry and conjugation strategies. In addition, tumor-targeting vectors with a short circulation time (e.g., Nanobody) or with an enhanced binding affinity (e.g., bispecific antibody) are being used to design novel immunoPET probes. Accordingly, several immunoPET probes, such as 89Zr-Df-pertuzumab and 89Zr-atezolizumab, have been successfully translated for clinical use. By noninvasively and dynamically revealing the expression of heterogeneous tumor antigens, immunoPET imaging is gradually changing the theranostic landscape of several types of malignancies. ImmunoPET is the method of choice for imaging specific tumor markers, immune cells, immune checkpoints, and inflammatory processes. Furthermore, the integration of immunoPET imaging in antibody drug development is of substantial significance because it provides pivotal information regarding antibody targeting abilities and distribution profiles. Herein, we present the latest immunoPET imaging strategies and their preclinical and clinical applications. We also emphasize current conjugation strategies that can be leveraged to develop next-generation immunoPET probes. Lastly, we discuss practical considerations to tune the development and translation of immunoPET imaging strategies.
Collapse
Affiliation(s)
- Weijun Wei
- Department of Nuclear Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
- Departments of Radiology and Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, Room 7137, Madison, Wisconsin 53705, United States
| | - Zachary T Rosenkrans
- Department of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Jianjun Liu
- Department of Nuclear Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Gang Huang
- Department of Nuclear Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
- Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China
| | - Quan-Yong Luo
- Department of Nuclear Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Weibo Cai
- Departments of Radiology and Medical Physics, University of Wisconsin-Madison, 1111 Highland Avenue, Room 7137, Madison, Wisconsin 53705, United States
- Department of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
- University of Wisconsin Carbone Cancer Center, Madison, Wisconsin 53705, United States
| |
Collapse
|
15
|
Cheal SM, Patel M, Yang G, Veach D, Xu H, Guo HF, Zanzonico PB, Axworthy DB, Cheung NKV, Ouerfelli O, Larson SM. An N-Acetylgalactosamino Dendron-Clearing Agent for High-Therapeutic-Index DOTA-Hapten Pretargeted Radioimmunotherapy. Bioconjug Chem 2020; 31:501-506. [PMID: 31891487 DOI: 10.1021/acs.bioconjchem.9b00736] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Clearing agents (CAs) can rapidly remove nonlocalized targeting biomolecules from circulation for hepatic catabolism, thereby enhancing the therapeutic index (TI), especially for blood (marrow), of the subsequently administered radioisotope in any multistep pretargeting strategy. Herein we describe the synthesis and in vivo evaluation of a fully synthetic glycodendrimer-based CA for DOTA-based pretargeted radioimmunotherapy (DOTA-PRIT). The novel dendron-CA consists of a nonradioactive yttrium-DOTA-Bn molecule attached via a linker to a glycodendron displaying 16 terminal α-thio-N-acetylgalactosamine (α-SGalNAc) units (CCA α-16-DOTA-Y3+; molecular weight: 9059 Da). Pretargeting [177Lu]LuDOTA-Bn with CCA α-16-DOTA-Y3+ to GPA33-expressing SW1222 human colorectal xenografts was highly effective, leading to absorbed doses of [177Lu]LuDOTA-Bn for blood, tumor, liver, spleen, and kidneys of 11.7, 468, 9.97, 5.49, and 13.3 cGy/MBq, respectively. Tumor-to-normal tissues absorbed-dose ratios (i.e., TIs) ranged from 40 (e.g., for blood and kidney) to about 550 for stomach.
Collapse
Affiliation(s)
- Sarah M Cheal
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Mitesh Patel
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Guangbin Yang
- Organic Synthesis Core Facility, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Darren Veach
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Hong Xu
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Hong-Fen Guo
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Pat B Zanzonico
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | | | - Nai-Kong V Cheung
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Ouathek Ouerfelli
- Organic Synthesis Core Facility, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Steven M Larson
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States.,Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| |
Collapse
|
16
|
Application of molecular imaging technology in tumor immunotherapy. Cell Immunol 2020; 348:104039. [DOI: 10.1016/j.cellimm.2020.104039] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/21/2019] [Accepted: 01/07/2020] [Indexed: 02/08/2023]
|
17
|
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]
|
18
|
Abstract
Molecular imaging enables both spatial and temporal understanding of the complex biologic systems underlying carcinogenesis and malignant spread. Single-photon emission tomography (SPECT) is a versatile nuclear imaging-based technique with ideal properties to study these processes in vivo in small animal models, as well as to identify potential drug candidates and characterize their antitumor action and potential adverse effects. Small animal SPECT and SPECT-CT (single-photon emission tomography combined with computer tomography) systems continue to evolve, as do the numerous SPECT radiopharmaceutical agents, allowing unprecedented sensitivity and quantitative molecular imaging capabilities. Several of these advances, their specific applications in oncology as well as new areas of exploration are highlighted in this chapter.
Collapse
Affiliation(s)
- Benjamin L Franc
- Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, H2232, MC 5281, Stanford, CA, 94305-5105, USA.
| | - Youngho Seo
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, USA
| | - Robert Flavell
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, USA
| | - Carina Mari Aparici
- Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, H2232, MC 5281, Stanford, CA, 94305-5105, USA
| |
Collapse
|
19
|
Goos JA, Cho A, Carter LM, Dilling TR, Davydova M, Mandleywala K, Puttick S, Gupta A, Price WS, Quinn JF, Whittaker MR, Lewis JS, Davis TP. Delivery of polymeric nanostars for molecular imaging and endoradiotherapy through the enhanced permeability and retention (EPR) effect. Theranostics 2020; 10:567-584. [PMID: 31903138 PMCID: PMC6929988 DOI: 10.7150/thno.36777] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 10/04/2019] [Indexed: 12/24/2022] Open
Abstract
Expression levels of biomarkers are generally unknown at initial diagnosis. The development of theranostic probes that do not rely on biomarker availability would expand therapy options for cancer patients, improve patient selection for nanomedicine and facilitate treatment of inoperable patients or patients with acquired therapy resistance. Herein, we report the development of star polymers, also known as nanostars, that allow for molecular imaging and/or endoradiotherapy based on passive targeting via the enhanced permeability and retention (EPR) effect. Methods: We synthesised a star copolymer, consisting of 7-8 centre-cross-linked arms that were modified with Gd3+ for magnetic resonance imaging (MRI), and functionalised either with 89Zr for in vivo quantification and positron emission tomography (PET) imaging, or with 177Lu for endoradiotherapy. 1H longitudinal relaxivities were determined over a continuum of magnetic field strengths ranging from 0.24 mT - 0.94 T at 37 °C (nuclear magnetic relaxation dispersion (NMRD) profile) and T 1-weighted MRI contrast enhancement was visualized at 3 T and 7 T. PET imaging and ex vivo biodistribution studies were performed in mice bearing tumours with high EPR (CT26) or low EPR (BxPC3) characteristics. Therapy studies were performed in mice with high EPR tumours and mean absorbed organ doses were estimated for a standard human model. Results: The star copolymer with Gd3+ displayed a significantly superior contrast enhancement ability (T 1 = 0.60 s) compared to the standard clinical contrast agent Gadovist (T 1 = 1.0 s). Quantification of tumour accumulation using the radiolabelled nanostars in tumour-bearing mice demonstrated an exceptionally high uptake in tumours with high EPR characteristics (14.8 - 21.7 %ID/g). Uptake of the star polymers in tumours with low EPR characteristics was significantly lower (P<0.001), suggesting passive tumour accumulation of the nanostars via the EPR effect. Survival of mice treated with high dose 177Lu-labelled star polymers was significantly higher than survival of mice treated with lower therapy doses or control mice (P=0.001), demonstrating the utility of the 177Lu-labelled star polymers as platforms for endoradiotherapy. Conclusion: Our work highlights the potential of star polymers as probes for the molecular imaging of cancer tissue or for the passive delivery of radionuclides for endoradiotherapy. Their high functionalisability and high tumour accumulation emphasises their versatility as powerful tools for nanomedicine.
Collapse
|
20
|
Parker CL, McSweeney MD, Lucas AT, Jacobs TM, Wadsworth D, Zamboni WC, Lai SK. Pretargeted delivery of PEG-coated drug carriers to breast tumors using multivalent, bispecific antibody against polyethylene glycol and HER2. NANOMEDICINE : NANOTECHNOLOGY, BIOLOGY, AND MEDICINE 2019; 21:102076. [PMID: 31394261 PMCID: PMC7224238 DOI: 10.1016/j.nano.2019.102076] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/18/2019] [Accepted: 07/29/2019] [Indexed: 12/19/2022]
Abstract
Pretargeting is an increasingly explored strategy to improve nanoparticle targeting, in which pretargeting molecules that bind both selected epitopes on target cells and nanocarriers are first administered, followed by the drug-loaded nanocarriers. Bispecific antibodies (bsAb) represent a promising class of pretargeting molecules, but how different bsAb formats may impact the efficiency of pretargeting remains poorly understood, in particular Fab valency and Fc receptor (FcR)-binding of bsAb. We found the tetravalent bsAb markedly enhanced PEGylated nanoparticle binding to target HER2+ cells relative to the bivalent bsAb in vitro. Pretargeting with tetravalent bsAb with abrogated FcR binding increased tumor accumulation of PEGylated liposomal doxorubicin (PLD) 3-fold compared to passively targeted PLD alone, and 5-fold vs pretargeting with tetravalent bsAb with normal FcR binding in vivo. Our work demonstrates that multivalency and elimination of FcRn recycling are both important features of pretargeting molecules, and further supports pretargeting as a promising nanoparticle delivery strategy.
Collapse
MESH Headings
- Animals
- Antibodies, Bispecific/chemistry
- Antibodies, Bispecific/pharmacology
- Antineoplastic Agents, Immunological/chemistry
- Antineoplastic Agents, Immunological/pharmacology
- Cell Line, Tumor
- Drug Carriers/chemistry
- Drug Carriers/pharmacology
- Female
- Humans
- Mice, Nude
- Neoplasms, Experimental/drug therapy
- Neoplasms, Experimental/metabolism
- Neoplasms, Experimental/pathology
- Polyethylene Glycols/chemistry
- Polyethylene Glycols/pharmacology
- Receptor, ErbB-2/antagonists & inhibitors
- Xenograft Model Antitumor Assays
- omega-Chloroacetophenone
Collapse
Affiliation(s)
- Christina L Parker
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, United States
| | - Morgan D McSweeney
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, United States
| | - Andrew T Lucas
- Division of Pharmacotherapy and Experimental Therapeutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, United States; UNC Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, United States; Carolina Center for Nanotechnology Excellence, University of North Carolina at Chapel Hill, United States
| | - Timothy M Jacobs
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, United States
| | - Daniel Wadsworth
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, United States
| | - William C Zamboni
- Division of Pharmacotherapy and Experimental Therapeutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, United States; UNC Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, United States; Carolina Center for Nanotechnology Excellence, University of North Carolina at Chapel Hill, United States
| | - Samuel K Lai
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, United States; Department of Biomedical Engineering, University of North Carolina at Chapel Hill, United States; Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, United States.
| |
Collapse
|
21
|
Therapeutic Applications of Pretargeting. Pharmaceutics 2019; 11:pharmaceutics11090434. [PMID: 31480515 PMCID: PMC6781323 DOI: 10.3390/pharmaceutics11090434] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 08/09/2019] [Accepted: 08/10/2019] [Indexed: 02/06/2023] Open
Abstract
Targeted therapies, such as radioimmunotherapy (RIT), present a promising treatment option for the eradication of tumor lesions. RIT has shown promising results especially for hematologic malignancies, but the therapeutic efficacy is limited by unfavorable tumor-to-background ratios resulting in high radiotoxicity. Pretargeting strategies can play an important role in addressing the high toxicity profile of RIT. Key to pretargeting is the concept of decoupling the targeting vehicle from the cytotoxic agent and administrating them separately. Studies have shown that this approach has the ability to enhance the therapeutic index as it can reduce side effects caused by off-target irradiation and thereby increase curative effects due to higher tolerated doses. Pretargeted RIT (PRIT) has been explored for imaging and treatment of different cancer types over the years. This review will give an overview of the various targeted therapies in which pretargeting has been applied, discussing PRIT with alpha- and beta-emitters and as part of combination therapy, plus its use in drug delivery systems.
Collapse
|
22
|
Pandit-Taskar N. Targeted Radioimmunotherapy and Theranostics with Alpha Emitters. J Med Imaging Radiat Sci 2019; 50:S41-S44. [PMID: 31451417 DOI: 10.1016/j.jmir.2019.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/12/2019] [Accepted: 07/16/2019] [Indexed: 11/29/2022]
Abstract
Radiolabeled antibodies allow for selective targeting of the cancer cells within a tumor. Both beta- and alpha-emitting radioisotopes can be linked to the antibodies for delivery of radiation to the cells. The choice of the radionuclide would depend on the biological characteristics of the antibody including its biodistribution and biological half-life. Alpha-emitting isotopes deliver high energy to target sites within short range and therefore less radiation to adjacent normal tissues. Whole antibodies have long biological clearance times that may be limiting due to radiation levels to blood and marrow. Novel strategies, such as development of smaller antibody fragments such as minibodies and diabodies, which have faster biological clearance, engineered bispecific antibodies, and multistep targeting that uses pretargeting and bioorthogonal click chemistry methods, appear promising. Several novel targets are being investigated in early-phase studies. This review provides a brief summary and current status of radioimmunotargeted agents in oncology.
Collapse
Affiliation(s)
- Neeta Pandit-Taskar
- Department of Radiology, Molecular Imaging and Therapy Service, Memorial Sloan Kettering Cancer Center, New York, New York, USA.
| |
Collapse
|
23
|
Membreno R, Keinänen OM, Cook BE, Tully KM, Fung KC, Lewis JS, Zeglis BM. Toward the Optimization of Click-Mediated Pretargeted Radioimmunotherapy. Mol Pharm 2019; 16:2259-2263. [PMID: 30912951 DOI: 10.1021/acs.molpharmaceut.9b00062] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Pretargeted radioimmunotherapy (PRIT) based on the inverse electron demand Diels-Alder reaction has shown promise in murine models of disease, yet the radiation dosimetry of this approach must be optimized to make it a viable clinical option. To this end, we have leveraged two recent developments in pretargeted imaging-dendritic scaffolds and masking agents-to improve the dosimetric profile of a proof-of-concept PRIT system that is based on the huA33 antibody, a 177Lu-labeled tetrazine radioligand ([177Lu]Lu-DOTA-PEG7-Tz), and a mouse model of A33 antigen-expressing colorectal carcinoma. Pretargeting using an huA33 immunoconjugate bearing a trans-cyclooctene-decorated dendritic scaffold (sshuA33-DEN-TCO) produced significantly higher tumoral activity concentrations at 120 h post-injection (23.0 ± 2.2 %ID/g) than those achieved with an analogous, dendrimer-lacking immunoconjugate (12.7 ± 2.6 %ID/g). However, pretargeting using sshuA33-DEN-TCO also resulted in increased activity concentrations in the blood at the same time point (1.9 ± 0.4 %ID/g) compared to the dendrimer-lacking construct (0.7 ± 0.2 %ID/g), thereby curtailing improvements to the tumor-to-blood therapeutic ratio of the system. In order to circumvent this issue, a tetrazine-labeled, dextran-based masking agent (Tz-DP) was injected prior to the radioligand to prevent the ligation between [177Lu]Lu-DOTA-PEG7-Tz and circulating immunoconjugate. This approach dramatically decreased the absorbed dose to the blood but also attenuated the absorbed dose to the tumor and increased the absorbed dose to the lungs. Ultimately, these data suggest that dendritic scaffolds and masking agents could be used to improve the dosimetry of PRIT, but the combination of these technologies will require extensive optimization.
Collapse
Affiliation(s)
- Rosemery Membreno
- Department of Chemistry , Hunter College of the City University of New York , New York , New York 10021 , United States.,Ph.D. Program in Chemistry , The Graduate Center of the City University of New York , New York , New York 10016 , United States
| | - Outi M Keinänen
- Department of Chemistry , Hunter College of the City University of New York , New York , New York 10021 , United States
| | - Brendon E Cook
- Department of Chemistry , Hunter College of the City University of New York , New York , New York 10021 , United States.,Ph.D. Program in Chemistry , The Graduate Center of the City University of New York , New York , New York 10016 , United States
| | | | - Kimberly C Fung
- Department of Chemistry , Hunter College of the City University of New York , New York , New York 10021 , United States.,Ph.D. Program in Chemistry , The Graduate Center of the City University of New York , New York , New York 10016 , United States
| | | | - Brian M Zeglis
- Department of Chemistry , Hunter College of the City University of New York , New York , New York 10021 , United States.,Ph.D. Program in Chemistry , The Graduate Center of the City University of New York , New York , New York 10016 , United States
| |
Collapse
|
24
|
Liu G. A Revisit to the Pretargeting Concept-A Target Conversion. Front Pharmacol 2018; 9:1476. [PMID: 30618765 PMCID: PMC6304396 DOI: 10.3389/fphar.2018.01476] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 12/03/2018] [Indexed: 01/22/2023] Open
Abstract
Pretargeting is often used as a tumor targeting strategy that provides much higher tumor to non-tumor ratios than direct-targeting using radiolabeled antibody. Due to the multiple injections, pretargeting is investigated less than direct targeting, but the high T/NT ratios have rendered it more useful for therapy. While the progress in using this strategy for tumor therapy has been regularly reviewed in the literature, this review focuses on the nature and quantitative understanding of the pretargeting concept. By doing so, it is the goal of this review to accelerate pretargeting development and translation to the clinic and to prepare the researchers who are not familiar with the pretargeting concept but are interested in applying it. The quantitative understanding is presented in a way understandable to the average researchers in the areas of drug development and clinical translation who have the basic concept of calculus and general chemistry.
Collapse
Affiliation(s)
- Guozheng Liu
- Department of Radiology, University of Massachusetts Medical School Worcester, MA, United States
| |
Collapse
|
25
|
Cheal SM, Xu H, Guo HF, Patel M, Punzalan B, Fung EK, Lee SG, Bell M, Singh M, Jungbluth AA, Zanzonico PB, Piersigilli A, Larson SM, Cheung NKV. Theranostic pretargeted radioimmunotherapy of internalizing solid tumor antigens in human tumor xenografts in mice: Curative treatment of HER2-positive breast carcinoma. Am J Cancer Res 2018; 8:5106-5125. [PMID: 30429889 PMCID: PMC6217068 DOI: 10.7150/thno.26585] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 07/24/2018] [Indexed: 12/11/2022] Open
Abstract
In recent reports, we have shown that optimized pretargeted radioimmunotherapy (PRIT) based on molecularly engineered antibody conjugates and 177Lu-DOTA chelate (DOTA-PRIT) can be used to cure mice bearing human solid tumor xenografts using antitumor antibodies to minimally internalizing membrane antigens, GPA33 (colon) and GD2 (neuroblastoma). However, many solid tumor membrane antigens are internalized after antibody binding and it is generally believed that internalizing tumor membrane antigens are not suitable targets for PRIT. In this study, we tested the hypothesis that DOTA-PRIT can be performed successfully to target HER2, an internalizing membrane antigen widely expressed in breast, ovarian, and gastroesophageal junction cancers. Methods: DOTA-PRIT was carried out in athymic nude mice bearing BT-474 xenografts, a HER2-expressing human breast cancer, using a three-step dosing regimen consisting of sequential intravenous administrations of: 1) a bispecific IgG-scFv (210 kD) format (BsAb) carrying the IgG sequence of the anti-HER2 antibody trastuzumab and the scFv “C825” with high-affinity, hapten-binding antibody for Bn-DOTA (metal) (BsAb: anti-HER2-C825), 2) a 500 kD dextran-based clearing agent, followed by 3) 177Lu-DOTA-Bn. At the time of treatment, athymic nude mice bearing established subcutaneous BT-474 tumors (medium- and smaller-sized tumors with tumor volumes of 209 ± 101 mm3 and ranging from palpable to 30 mm3, respectively), were studied along with controls. We studied single- and multi-dose regimens. For groups receiving fractionated treatment, we verified quantitative tumor targeting during each treatment cycle using non-invasive imaging with single-photon emission computed tomography/computed tomography (SPECT/CT). Results: We achieved high therapeutic indices (TI, the ratio of radiation-absorbed dose in tumor to radiation-absorbed dose to critical organs, such as bone marrow) for targeting in blood (TI = 28) and kidney (TI = 7), while delivering average radiation-absorbed doses of 39.9 cGy/MBq to tumor. Based on dosimetry estimates, we implemented a curative fractionated therapeutic regimen for medium-sized tumors that would deliver approximately 70 Gy to tumors, which required treatment with a total of 167 MBq 177Lu-DOTA-Bn/mouse (estimated absorbed tumor dose: 66 Gy). This regimen was well tolerated and achieved 100% complete responses (CRs; defined herein as tumor volume equal to or smaller than 4.2 mm3), including 62.5% histologic cure (5/8) and 37.5% microscopic residual disease (3/8) at 85 days (d). Treatment controls showed tumor progression to 207 ± 201% of pre-treatment volume at 85 d and no CRs. Finally, we show that treatment with this curative 177Lu regimen leads to a very low incidence of histopathologic abnormalities in critical organs such as bone marrow and kidney among survivors compared with non-treated controls. Conclusion: Contrary to popular belief, we demonstrate that DOTA-PRIT can be successfully adapted to an internalizing antigen-antibody system such as HER2, with sufficient TIs and absorbed tumor doses to achieve a high probability of cures of established human breast cancer xenografts while sparing critical organs of significant radiotoxicity.
Collapse
|
26
|
Wu Z, Guo HF, Xu H, Cheung NKV. Development of a Tetravalent Anti-GPA33/Anti-CD3 Bispecific Antibody for Colorectal Cancers. Mol Cancer Ther 2018; 17:2164-2175. [PMID: 30082472 DOI: 10.1158/1535-7163.mct-18-0026] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 06/17/2018] [Accepted: 07/31/2018] [Indexed: 01/09/2023]
Abstract
Despite progress in the treatment of colorectal cancer, curing metastatic colorectal cancer remains a major unmet medical need worldwide. Here, we describe a T-cell-engaging bispecific antibody (T-BsAb) to redirect polyclonal cytotoxic T cells to eradicate colorectal cancer. A33, a murine antibody specific for GPA33, was humanized to huA33 and reformatted to huA33-BsAb, based on a novel IgG(L)-scFv platform by linking the anti-CD3 huOKT3 scFv to the carboxyl end of the light chain. This T-BsAb was stably expressed in CHO cells and purified as a stable monomer by HPLC, retaining immunoreactivity by FACS through 30 days of incubation at 37°C. In vitro, it induced activation and expansion of unstimulated T cells and elicited potent T-cell-dependent cell-mediated cytotoxicity against colon and gastric cancer cells in an antigen-specific manner. In vivo, huA33-BsAb inhibited the colon and gastric cancer xenografts, in both subcutaneous and intraperitoneal tumor models. More importantly, both microsatellite instable and microsatellite stable colorectal cancer were effectively eliminated by huA33-BsAb. These preclinical results provide further support for the use of IgG(L)-scFv platform to build BsAb, and especially one targeting GPA33 for colorectal cancer. These preclinical results also support further development of huA33-BsAb as a potential immunotherapeutic. Mol Cancer Ther; 17(10); 2164-75. ©2018 AACR.
Collapse
Affiliation(s)
- Zhihao Wu
- Memorial Sloan Kettering Cancer Center, New York, New York
| | - Hong-Fen Guo
- Memorial Sloan Kettering Cancer Center, New York, New York
| | - Hong Xu
- Memorial Sloan Kettering Cancer Center, New York, New York
| | | |
Collapse
|
27
|
Carter LM, Poty S, Sharma SK, Lewis JS. Preclinical optimization of antibody-based radiopharmaceuticals for cancer imaging and radionuclide therapy-Model, vector, and radionuclide selection. J Labelled Comp Radiopharm 2018; 61:611-635. [PMID: 29412489 PMCID: PMC6081268 DOI: 10.1002/jlcr.3612] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 12/19/2017] [Accepted: 01/16/2018] [Indexed: 12/25/2022]
Abstract
Intact antibodies and their truncated counterparts (eg, Fab, scFv fragments) are generally exquisitely specific and selective vectors, enabling recognition of individual cancer-associated molecular phenotypes against a complex and dynamic biomolecular background. Complementary alignment of these advantages with unique properties of radionuclides is a defining paradigm in both radioimmunoimaging and radioimmunotherapy, which remain some of the most adept and promising tools for cancer diagnosis and treatment. This review discusses how translational potency can be maximized through rational selection of antibody-nuclide couples for radioimmunoimaging/therapy in preclinical models.
Collapse
Affiliation(s)
- Lukas M Carter
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Sophie Poty
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Sai Kiran Sharma
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Jason S Lewis
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York, USA
- Departments of Radiology and Pharmacology, Weill Cornell Medical College, New York, New York, USA
- Radiochemistry and Molecular Imaging Probes Core, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| |
Collapse
|
28
|
Carlin S. Penetrating the Barriers to Successful α-Radioimmunotherapy. J Nucl Med 2018; 59:934-936. [DOI: 10.2967/jnumed.117.205146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 02/21/2018] [Indexed: 01/02/2023] Open
|