Department of Biological Sciences and Center for Reproductive Biology, University of Idaho, Moscow, ID 83844-3051, USA.
J Virol. 2011 Jun;85(12):6049-54. doi: 10.1128/JVI.02514-10. Epub 2011 Apr 13.
Human cytomegalovirus (HCMV) selectively relocalizes many DNA repair proteins, thereby avoiding a potentially detrimental damage response. In the present study, we evaluated interactions between HCMV and the homology-directed repair (HDR) pathway. In permissive human foreskin fibroblasts, a fluorescence-based double-stranded break repair assay was used to determine that HCMV stimulated HDR. Repair of both stably integrated and extrachromosomal reporter substrates was observed to increase. HDR was also stimulated through individual expression of the viral immediate-early protein IE1-72, mimicking full virus infection. These experiments further demonstrate HCMV's role in modulating critical cellular processes during a permissive infection.
人巨细胞病毒(HCMV)选择性地重新定位许多 DNA 修复蛋白,从而避免潜在的有害损伤反应。在本研究中,我们评估了 HCMV 与同源定向修复(HDR)途径之间的相互作用。在允许的人包皮成纤维细胞中,使用基于荧光的双链断裂修复测定法来确定 HCMV 刺激 HDR。观察到稳定整合和染色体外报告子底物的修复均增加。通过病毒立即早期蛋白 IE1-72 的单独表达也刺激了 HDR,模拟了完整病毒感染。这些实验进一步证明了 HCMV 在调节允许感染期间关键细胞过程中的作用。