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Lee HG, Kim H, Kim EJ, Park PG, Dong SM, Choi TH, Kim H, Chong CR, Liu JO, Chen J, Ambinder RF, Hayward SD, Park JH, Lee JM. Targeted therapy for Epstein-Barr virus-associated gastric carcinoma using low-dose gemcitabine-induced lytic activation. Oncotarget 2016; 6:31018-29. [PMID: 26427042 PMCID: PMC4741585 DOI: 10.18632/oncotarget.5041] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 08/24/2015] [Indexed: 12/26/2022] Open
Abstract
The constant presence of the viral genome in Epstein-Barr virus (EBV)-associated gastric cancers (EBVaGCs) suggests the applicability of novel EBV-targeted therapies. The antiviral nucleoside drug, ganciclovir (GCV), is effective only in the context of the viral lytic cycle in the presence of EBV-encoded thymidine kinase (TK)/protein kinase (PK) expression. In this study, screening of the Johns Hopkins Drug Library identified gemcitabine as a candidate for combination treatment with GCV. Pharmacological induction of EBV-TK or PK in EBVaGC-originated tumor cells were used to study combination treatment with GCV in vitro and in vivo. Gemcitabine was found to be a lytic inducer via activation of the ataxia telangiectasia-mutated (ATM)/p53 genotoxic stress pathway in EBVaGC. Using an EBVaGC mouse model and a [125I] fialuridine (FIAU)-based lytic activation imaging system, we evaluated gemcitabine-induced lytic activation in an in vivo system and confirmed the efficacy of gemcitabine-GCV combination treatment. This viral enzyme-targeted anti-tumor strategy may provide a new therapeutic approach for EBVaGCs.
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Affiliation(s)
- Hyun Gyu Lee
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hyemi Kim
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eun Jung Kim
- Radiopharmaceutical Research Team, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Pil-Gu Park
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Seung Myung Dong
- Research Institute, National Cancer Center, Goyang, Gyeonggi-do, Republic of Korea
| | - Tae Hyun Choi
- Radiopharmaceutical Research Team, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Hyunki Kim
- Department of Pathology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Curtis R Chong
- Lowe Center for Thoracic Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, MA, USA.,Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, MA, USA
| | - Jun O Liu
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jianmeng Chen
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Richard F Ambinder
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - S Diane Hayward
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jeon Han Park
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jae Myun Lee
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Republic of Korea
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Braghirolli AMS, Waissmann W, da Silva JB, dos Santos GR. Production of iodine-124 and its applications in nuclear medicine. Appl Radiat Isot 2014; 90:138-48. [PMID: 24747530 DOI: 10.1016/j.apradiso.2014.03.026] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 03/07/2014] [Accepted: 03/24/2014] [Indexed: 12/16/2022]
Abstract
Until recently, iodine-124 was not considered to be an attractive isotope for medical applications owing to its complex radioactive decay scheme, which includes several high-energy gamma rays. However, its unique chemical properties, and convenient half-life of 4.2 days indicated it would be only a matter of time for its frequent application to become a reality. The development of new medical imaging techniques, especially improvements in the technology of positron emission tomography (PET), such as the development of new detectors and signal processing electronics, has opened up new prospects for its application. With the increasing use of PET in medical oncology, pharmacokinetics, and drug metabolism, (124)I-labeled radiopharmaceuticals are now becoming one of the most useful tools for PET imaging, and owing to the convenient half-life of I-124, they can be used in PET scanners far away from the radionuclide production site. Thus far, the limited availability of this radionuclide has been an impediment to its wider application in clinical use. For example, sodium [(124)I]-iodide is potentially useful for diagnosis and dosimetry in thyroid disease and [(124)I]-M-iodobenzylguanidine ([(124)I]-MIBG) has enormous potential for use in cardiovascular imaging, diagnosis, and dosimetry of malignant diseases such as neuroblastoma, paraganglioma, pheochromocytoma, and carcinoids. However, despite that potential, both are still not widely used. This is a typical scenario of a rising new star among the new PET tracers.
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Affiliation(s)
- Ana Maria S Braghirolli
- Instituto de Engenharia Nuclear, IEN-CNEN, Divisão de Radiofármacos, Rua Hélio de Almeida 75, Cidade Universitária, Ilha do Fundão, 21941-906 Rio de Janeiro, Brazil.
| | - William Waissmann
- Fundação Oswaldo Cruz, Escola Nacional de Sáúde Pública Sérgio Arouca, Centro de Estudos da Saúde do Trabalhador e Ecologia Humana, Rua Leopoldo Bulhões 1480, Manguinhos, RJ, Rio de Janeiro 21041-210, Brazil.
| | - Juliana Batista da Silva
- Centro de Desenvolvimento da Tecnologia Nuclear, CDTN-CNEN, Av. Antônio Carlos, 6627 Campus UFMG, Pampulha, BH/MG CEP: 30161-970, Brazil.
| | - Gonçalo R dos Santos
- Instituto de Engenharia Nuclear, IEN-CNEN, Divisão de Radiofármacos, Rua Hélio de Almeida 75, Cidade Universitária, Ilha do Fundão, 21941-906 Rio de Janeiro, Brazil.
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Yan R, Sander K, Galante E, Rajkumar V, Badar A, Robson M, El-Emir E, Lythgoe MF, Pedley RB, Årstad E. A one-pot three-component radiochemical reaction for rapid assembly of 125I-labeled molecular probes. J Am Chem Soc 2013; 135:703-9. [PMID: 23194416 DOI: 10.1021/ja307926g] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Nuclear imaging in conjunction with radioactive tracers enables noninvasive measurements of biochemical events in vivo. However, access to tracers remains limited due to the lack of methods for rapid assembly of radiolabeled molecules with the prerequisite biological activity. Herein, we report a one-pot, three-component, copper(II)-mediated reaction of azides, alkynes, and [(125)I]iodide to yield 5-[(125)I]iodo-1,2,3-triazoles. Using a selection of azides and alkynes in a combinatorial approach, we have synthesized a library of structurally diverse (125)I-labeled triazoles functionalized with bioconjugation groups, fluorescent dyes, and biomolecules. Our preliminary biological evaluation suggests that 5-[(125)I]iodo-1,2,3-triazoles are resistant to deiodination in vivo, both as small molecular probes and as antibody conjugates. The ability to incorporate radioactive iodide into triazoles directly from the parent azides and alkynes makes the method broadly applicable and offers the potential to rapidly assemble molecular probes from an array of structurally diverse, and readily available, building blocks.
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Affiliation(s)
- Ran Yan
- Institute of Nuclear Medicine and Department of Chemistry, University College London, 235 Euston Road (T-5), London NW1 2BU, UK
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Moon BS, Jo NH, Lee KC, El-Gamal MI, An GI, Hong SH, Choi TH, Choi WK, Park JH, Cho JH, Cheon GJ, Oh CH. Comparison of D-[18. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.11.3309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Jo NH, Kim JY, El-Gamal MI, Choi WK, Park JH, Kim EJ, Cho JH, Ha HJ, Choi TH, Oh CH. Radiosynthesis and in vitro evaluation of 1-(tetrahydro-5-hydroxy-6-(hydroxymethyl)-2H-pyran-3-yl)-5-[125I]iodouracil: A new potential agent for HSV1-tk reporter gene monitoring. J Labelled Comp Radiopharm 2010. [DOI: 10.1002/jlcr.1819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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