한국환경성돌연변이발암원학회지 (Environmental Mutagens and Carcinogens)
- 제8권1호
- /
- Pages.1-12
- /
- 1988
- /
- 1225-6307(pISSN)
환경성 유해요인이 유전물질과 세포활성에 미치는 영향 III. 포유동물세포에서 돌연변이원에 의한 DNA 상해의 회복에 미치는 DNA 중합효소저해제의 영향
Enviromental Toxic Agents on Genetic Material and Cellular Activity III. DNA Polymerase Inhibitors on Repair of Mutagen-Induced DNA Damage in Mammalian Cells
초록
본 연구는 Ethyl methanesulfonato(EMS) 혹은 Bleomycin(BLM)에 의해 유발된 DNA상해의 회복에 미치는 DNA 종합효소
The effects of aphidicolin (APC), an inhibitor of DNA polymerase alpha, or 2', 3'-dideoxythymidine 5'-triphosphate (ddTTP), an inhibitor of DNA polymerase beta, on the repair of DNA damage induced by ethyl methanesulfonate (EMS) or bleomycin (BLM) were investigated in Chinese hamster ovary (CHO)-K1 cells. Three assays were employed in this study: unscheduled DNA synthesis, alkaline elution and alkaline sucrose gradient sedimentation. It was shown that APC or ddTTP inhibited DNA induced by EMS, and thus, the post-treatment with APC or ddTTP following EMS treatment was resulted in the more amount of unscheduled DNA synthesis, and the more accumulation of DNA single-stand breaks than the cells post-incubated without APC or ddTTP. While, in the BLM induced DNA repair, only ddTTP inhibited DNA repair induced by BLM. And thus, the groups post-incubated with or without APC after BLM treatment had the same value in the amount of unscheduled DNA synthesis and of DNA single-strand breaks, while post-treatment with ddTTP was resulted in the increased amount of unscheduled DNA synthesis and the increased DNA sin -strand breaks than the group without ddTTP. These results suggested that both of DNA polymerase
키워드