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논문 기본 정보

자료유형
학술저널
저자정보
Kim, Jeong Hee (Department of iochemistry and Institute of Oral Biology, Collee of Dentistry Kyung Hee University) Lee, Eun Ju (Department of iochemistry and Institute of Oral Biology, Collee of Dentistry Kyung Hee University) Hyun, Jin Won (Department of iochemistry and Institute of Oral Biology, Collee of Dentistry Kyung Hee University) Kim, Sung Ho (Department of Veterinary Anatomy, College of Veterinary Medicine, Chonnam National University) Mar, Woongchon (Natural Products Research Institute, Seoul National University) Kim, Jin Kyu (Korea Atomic Energy Research Institute)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제21권 제6호
발행연도
1998.1
수록면
683 - 687 (5page)

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We have examined in vitro and in vivo radioprotective effects of a well-known thiol-containing compound, dithiothreitol (DTT). The treatment of both 0.5 and 1mM of DTT significantly increased clonogenic survival of ${\gamma}$-ray irradiated Chinese hamster (V79-4) cells. In order to investigate the possible radioprotective mechanism of DTT, we measured gamma-ray induced chromosome aberration by micronucleus assay. In the presence of 0.5mM or 1mM DTT, the frequencies of micronuclei were greatly reduced in all dose range examined (1.5-8 GY). Slightly higher reduction in micronucleus formation was observed in 1mM DTT-treated cells than in 0.5mM DTT-treated cells. In addition, incubation with both 0.5 and 1mM of DTT prior to gamma-ray irradiation reduced nucleosomal DNA fragmentation at about same extent, this result suggests that treatment of DTT at concentrations of 0.5 and 1mM reduced radiation-induced apoptosis. In vivo experiments, we also observed that DTT treatment reduced the incidence of apoptotic cells in mouse small intestine crypts. In irradiated control group 4.4${\pm}$0.5 apoptotic cells per crypt were observed. In DTT-administered and irradiated mice, only 2.1${\pm}$0.4 apoptotic cells per crypt was observed. In vitro and in vivo data obtained in this study showed that DTT reduced radiation-induced damages and it seems that the possible radioprotective mechanisms of action of DTT are prevention of chromosome aberration.

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