摘要
背景:活性氧(ROS)是正常细胞代谢过程(例如线粒体氧化磷酸化)的副产物。虽然低水平的ROS是重要的信号分子,但高水平的ROS可能会破坏蛋白质,脂质和DNA。确实,氧化性DNA损伤是哺乳动物基因组中最常见的损伤类型,与人类疾病(例如癌症和神经退行性疾病)有关。尽管氧化性DNA损伤主要通过碱基切除修复(BER)途径清除,但最近的证据表明,其他途径,例如核苷酸切除修复(NER)和错配修复(MMR)也可以参与这些病变的清除。氧化性DNA损伤的最常见形式之一是碱基损伤8-氧鸟嘌呤(8-oxoG),如果不进行修复,可能会导致复制过程中G:C向A:T的转化,这是一种常见的诱变特征,可导致细胞凋亡。转型。 目的:修复氧化性DNA损伤,包括8-oxoG碱基损伤,涉及一系列酶促反应中许多蛋白质之间的功能相互作用。这篇综述描述了8-oxoG损害的BER初始阶段所涉及的关键蛋白的作用和氧化还原调节,即Apurinic / Apyrimidinic核酸内切酶1(APE1),人8-氧代鸟嘌呤DNA糖基化酶1(hOGG1)和链DNA结合蛋白1(hSSB1)。此外,讨论了靶向这些关键蛋白在癌症中的治疗潜力和方式。 结论:越来越明显的是某些DNA修复蛋白在多种修复途径中起作用。抑制这些因素将为开发更有效的癌症疗法提供有吸引力的策略。
关键词: ROS,BER,APE1,hOGG1,hSSB1 / NABP2 / OBFC2B,DNA修复,癌症治疗剂。
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