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논문 기본 정보

자료유형
학술저널
저자정보
Yoo, Ran Ji (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Sciences [KIRAMS]) Lee, Ji Woong (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Sciences [KIRAMS]) Lee, Kyo Chul (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Sciences [KIRAMS]) An, Gwang Il (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Sciences [KIRAMS]) Ko, In Ok (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Sciences [KIRAMS]) Chung, Wee Sup (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Sciences [KIRAMS]) Park, Ji Ae (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Sciences [KIRAMS]) Kim, Kyeong Min (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Sciences [KIRAMS]) Choi, Yang-Kyu (Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University) Kang, Joo Hyun (Molecular Imaging Research Center, Korea Institute of Radiological & Medical Sciences [KIRAMS]) Lim, Sang Moo (Department of Nuclear Medicine, K) Lee, Yong Jin
저널정보
대한방사성의약품학회 대한방사성의약품학회지 대한방사성의약품학회지 제1권 제2호
발행연도
2015.1
수록면
123 - 129 (7page)

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$^{64}Cu$-labeled diacetyl-bis($N^4$-methylthiosemicarbazone) is a promising agent for internal radiation therapy and imaging of hypoxic tissues. In the study, we confirmed hypoxia regions in VX2 tumor implanted rabbits with injection $^{64}Cu$-ATSM and $^{18}F$-FDG using positron emission tomography (PET)/computed tomography (CT). PET images with $^{18}F$-FDG and $^{64}Cu$-ATSM were obtained for 40 min by dynamic scan and additional delayed PET images of $^{64}Cu$-ATSM the acquired up to 48 hours. Correlation between intratumoral $O_2$ level and $^{64}Cu$-ATSM PET image was analyzed. $^{64}Cu$-ATSM and $^{18}F$-FDG were intravenously co-injected and the tumor was dissected and cut into slices for a dual-tracer autoradiographic analysis. In the PET imaging, $^{64}Cu$-ATSM in VX2 tumors displayed a specific uptake in hypoxic region for48 h. The uptake pattern of $^{64}Cu$-ATSM in VX2 tumor at 24 and 48 h did not match to the $^{18}F$-FDG. Through ROI analysis, in the early phase (dynamic scan), $^{18}F$-FDG has positive correlation with $^{64}Cu$-ATSM but late phase (24 and 48 h) of the $^{64}Cu$-ATSM showed negative correlation with $^{18}F$-FDG. High uptake of $^{64}Cu$-ATSM in hypoxic region was responded with significant decrease of oxygen pressure, which confirmed by $^{64}Cu$-ATSM PET imaging and autoradiographic analysis. In conclusion, $^{64}Cu$-ATSM can utilize for specific targeting of hypoxic region in tumor, and discrimination between necrotic- and viable hypoxic tissue.

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