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논문 기본 정보

자료유형
학술저널
저자정보
Seelam, Sudhakara Reddy (Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine) Lee, Ji Youn (Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine) Kim, Young Joo (Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine) Lee, Yun-Sang (Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine) Jeong, Jae Min (Department of Nuclear Medicine, Institute of Radiation Medicine, Seoul National University College of Medicine)
저널정보
대한방사성의약품학회 대한방사성의약품학회지 대한방사성의약품학회지 제1권 제2호
발행연도
2015.1
수록면
137 - 144 (8page)

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Hypoxia is an important adverse prognostic factor for tumor progression and is a major cause of failure of radiation therapy. In case of short-term hypoxia, the metabolism can recover to normal, but if hypoxia persists, it causes irreversible cell damage and finally leads to death. So a hypoxia marker would be very useful in oncology. In particular, 2-nitroimidazole can be reduced to form a reactive chemical species, which can bind irreversibly to cell components in the absence of sufficient oxygen, thus, the development of radiolabeled nitroimidazole derivatives for the imaging of hypoxia remains an active field of research to improve cancer therapy result. 2-nitroimidazole based hypoxia marker, [$^{18}F$]FMISO holds promise for the evaluation of tumor hypoxia by Positron emission tomography (PET), at both global and local levels. In the present study, [$^{18}F$]FMISO was synthesized using an automatic synthesis module with high radiochemical purity (>99%) in 60 min. Immunohistochemical analysis using pimonidazole confirmed the presence of hypoxia in xenografted CT-26 tumor tissue. A biodistribution study in CT-26 xenografted mice showed that the increased tumor-to-muscle ratio and tumor-to-blood ratios from 10 to 120 min post-injection. In the PET study, [$^{18}F$]FMISO also showed increased tumor-to-muscle ratios from 10 to 120 min post-injection. In conclusion, this study demonstrates the feasibility and utility of [$^{18}F$]FMISO for imaging hypoxiain mouse colon cancer model using small animal PET.

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