Hydrogen peroxide activated quinone methide precursors with enhanced DNA cross-linking capability and cytotoxicity towards cancer cells
作者:Yibin Wang、Heli Fan、Kumudha Balakrishnan、Zechao Lin、Sheng Cao、Wenbing Chen、Yukai Fan、Quibria A. Guthrie、Huabing Sun、Kelly A. Teske、Varsha Gandhi、Leggy A. Arnold、Xiaohua Peng
DOI:10.1016/j.ejmech.2017.03.041
日期:2017.6
activity. A cell-based screen demonstrated that compounds 2a and 5a with a OMe or OH group dramatically inhibited the growth of various tissue-derived cancer cells while normal cells were less affected. Induction of H2AX phosphorylation by these compounds in CLL lymphocytes provide evidence for a correlation between cell death and DNA damage. The compounds presented herein showed potent anticancer activities
由内源性生成的H2O2诱导的甲基苯醌(QM)形成对生物学和生物医学应用具有吸引力。为了克服由于H 2 O 2活化的QM前体的低生物活性而引起的电流限制,我们在本文中引入了几种新的芳基硼酸酯,其在苯环的不同位置和/或不同的中性离去基团上具有给电子取代基。通过使用Br作为离去基团而不是乙酰氧基,可以加快芳基硼酸酯与H2O2的反应速度,以及随后形成的双醌甲基化物和DNA交联反应。另外,一个供体基团放置在醌甲基化的新生exo-亚甲基上,大大改善了H2O2诱导的DNA链间交联的形成,并增强了细胞活性。多个供体基团降低了稳定性和DNA交联能力,导致细胞活性降低。基于细胞的筛选表明,具有OMe或OH基团的化合物2a和5a显着抑制了各种组织来源的癌细胞的生长,而正常细胞受到的影响较小。这些化合物在CLL淋巴细胞中诱导H2AX磷酸化提供了细胞死亡与DNA损伤之间相关性的证据。本文提供的化合物显示出有效的抗癌