著者
松本 義久
出版者
公益社団法人 日本医学物理学会
雑誌
医学物理 (ISSN:13455354)
巻号頁・発行日
vol.34, no.2, pp.57-64, 2014 (Released:2015-03-06)
参考文献数
15

DNA double-strand break (DSB) is considered most deleterious among radiation-induced DNA damages and most relevant to the biological effects of radiation. In eukaryotic cells, DSB is repaired mainly through two pathways: non-homologous end-joining (NHEJ) and homologous recombination (HR). These repair pathways seem to play complementary roles. NHEJ is considered less accurate than HR, but HR is available only in late S and G2 phases in vertebrates. Recent studies elucidated how cells choose one from these two pathways depending on the circumstance: cell cycle phase, complexity of DNA damage and chromatin structure.

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