Dihydropyrazine Derivatives as a New Type of DNA Strand Breaking Agent.
作者:Tadatoshi YAMAGUCHI、Nobuhiro KASHIGE、Noriko MISHIRO、Fumio MIAKE、Kenji WATANABE
DOI:10.1248/bpb.19.1261
日期:——
The DNA strand-breaking activity of some dihydropyrazine derivatives, 2, 3-dihydro-5, 6-dimethylpyrazine (3), 2, 3-dihydro-2, 5, 6-trimethylpyrazine (4), 2, 3-dihydro-2, 2, 5, 6-tetramethylpyrazine (5), trans-2, 3-dimethyl-5, 6, 7, 8, 9, 10-hexahydroquinoxaline (6), its cis-compound (7) and the mixture of 6 and 7 (8) was tested by agarose gel electrophoresis using plasmide pBR322 ccc-DNA as a substrate. The order of DNA strand-breaking activity in the presence of Cu2+ was (7)>(8)≥(5)>(2)>(6)>(4)≥(1)≥(3). 2, 5-Bis(D-arabino-tetrahydroxybutyl)-2, 5-dihydropyrazine (1) and 2, 5-dihydro-3, 6-dimethylpyrazine (2) have already been described in terms of DNA breaking activity in a previous paper.The activity was suggested to be due to the dihydropyrazine skeleton, in addition to active oxygen radicals formed in an aqueous solutoin. The introduction of a methyl group to the dihydropyrazine skeleton enhanced the activities of dihydropyrazine derivatives. The possible chemical basis for DNA strand breakage by dihydropyrazine derivatives, especially in the presence of Cu2+, was discussed.
一些二氢吡嗪衍生物、2, 3-二氢-5, 6-二甲基吡嗪 (3)、2, 3-二氢-2, 5, 6-三甲基吡嗪 (4)、2, 3-二氢-2 的 DNA 链断裂活性, 2, 5, 6-四甲基吡嗪(5),反式-2, 3-二甲基-5, 6, 7, 8, 9, 10-六氢喹喔啉(6),其顺式化合物(7)以及6和的混合物使用质粒pBR322 ccc-DNA作为底物,通过琼脂糖凝胶电泳测试图7(8)。 Cu2+存在下DNA链断裂活性的顺序为(7)>(8)≥(5)>(2)>(6)>(4)≥(1)≥(3)。 2, 5-双(D-阿拉伯四羟基丁基)-2, 5-二氢吡嗪 (1) 和 2, 5-二氢-3, 6-二甲基吡嗪 (2) 已在之前的论文中根据 DNA 断裂活性进行了描述该活性被认为是由于二氢吡嗪骨架以及水溶液中形成的活性氧自由基所致。在二氢吡嗪骨架中引入甲基增强了二氢吡嗪衍生物的活性。讨论了二氢吡嗪衍生物造成 DNA 链断裂的可能化学基础,特别是在 Cu2+ 存在的情况下。