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자료유형
학술저널
저자정보
Arimoto-Kobayashi, Sakae (Faculty of Pharmaceutical Sciences, Okayama University) Ando, Yoshiko (Faculty of Pharmaceutical Sciences, Okayama University) Horai, Yumi (Faculty of Pharmaceutical Sciences, Okayama University) Okamoto, Keinosuke (Faculty of Pharmaceutical Sciences, Okayama University) Hayatsu, Hikoya (Faculty of Pharmaceutical Sciences, Okayama University) Green, Michael H.L. (School of Pharmacy and Biomolecular Sciences, University of Brighton)
저널정보
한국광과학회 Journal of photoscience : an international journal officail organ of the korean society of photoscience Journal of photoscience : an international journal officail organ of the korean society of photoscience 제9권 제3호
발행연도
2002.1
수록면
49 - 50 (2page)

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N-Nitrosoproline(NPRO) is endogenously formed from proline and nitrite. NPRO has been reported to be nonmutagenic and noncarcinogenic. In this study, we have detected the direct mutagenicity of NPRO with UVA and UVB towards S. typhimurium. Formation of 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG), a mutagenic lesion, was observed in calf thymus DNA treated with NPRO plus simulated sunlight. Furthermore, the treatment with NPRO and sunlight induced single strand breaks in the superhelical replicative form of phage M13mp2 DNA. An analysis using scavengers suggested that both reactive oxygen species and NO radical mediate the strand breaks. The formation of nitric oxide was observed in NPRO solution irradiated with UVA. The co-mutagenic and co-toxic actions of NPRO and sunlight merit attention as possible mechanisms increasing the carcinogenic risk from UVA irradiation.

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