Department of Pathology, The University of Alabama at Birmingham, Birmingham, Alabama.
O'Neal Comprehensive Cancer Center, The University of Alabama at Birmingham, Birmingham, Alabama.
Mol Cancer Res. 2020 Feb;18(2):185-193. doi: 10.1158/1541-7786.MCR-19-0665. Epub 2019 Nov 1.
Radiation, alkylating agents, and platinum-based chemotherapy treatments eliminate cancer cells through the induction of excessive DNA damage. The resultant DNA damage challenges the cancer cell's DNA repair capacity. Among the different types of DNA damage induced in cells, double-strand breaks (DSB) are the most lethal if left unrepaired. Unrepaired DSBs in tumor cells exacerbate existing gene deletions, chromosome losses and rearrangements, and aberrant features that characteristically enable tumor progression, metastasis, and drug resistance. Tumor microenvironmental factors like hypoxia, inflammation, cellular metabolism, and the immune system profoundly influence DSB repair mechanisms. Here, we put into context the role of the microenvironment in governing DSB repair mechanisms.
辐射、烷化剂和基于铂的化疗通过诱导过度的 DNA 损伤来消除癌细胞。由此产生的 DNA 损伤挑战了癌细胞的 DNA 修复能力。在细胞中诱导的不同类型的 DNA 损伤中,如果不修复,双链断裂 (DSB) 是最致命的。肿瘤细胞中未修复的 DSB 会加剧现有基因缺失、染色体丢失和重排以及异常特征,这些特征通常使肿瘤能够进展、转移和产生耐药性。肿瘤微环境因素,如缺氧、炎症、细胞代谢和免疫系统,深刻地影响 DSB 修复机制。在这里,我们将微环境在调控 DSB 修复机制中的作用置于上下文中。