腺病毒介导c-FLIPs基因诱导淋巴细胞抗凋亡作用

Adenovirus containing c-FLIPs gene induces antiapoptosis activation of lymphocyte in vitro

目的 探讨表达c FLIPs重组腺病毒诱导淋巴细胞抗凋亡作用。方法 采用RT PCR方法,从人T淋巴细胞株的总RNA中克隆c FLIPs基因;通过pAdeasy系统,构建表达c FLIPs的重组腺病毒Ad c FLIPs;Hochest染色法及PI染色流式细胞仪检测anti Apo 1诱导感染Ad c FLIPs后的H9细胞凋亡。结果 采用RT PCR方法从人T淋巴细胞株中扩增出c FLIPs基因;构建重组腺病毒Ad c FLIPs ;经Hoechst染色,荧光显微镜下观察细胞核的形态,结果发现,经anti Apo 1诱导凋亡处理2 4h后,未经Ad c FLIPs感染的H9细胞有大量的细胞核呈浓染致密的固缩形态或颗粒状荧光的凋亡细胞;Ad c FLIPs感染的H9细胞中细胞核呈浓染致密的固缩形态或颗粒状荧光的细胞数明显减少,大部分细胞染色质呈弥漫均匀低强度荧光;流式细胞仪分析经PI染色后的H9细胞,未经Ad c FLIPs预处理的H9细胞在anti Apo 1作用2 4h后,细胞的凋亡率分别为4 8 33%±7 4 1% ;经Ad c FLIPs预处理1d的H9细胞,其细胞凋亡率分别下降到3 6 0 %±0 2 1%。结论 重组腺病毒Ad c FLIPs可有效地诱导淋巴细胞的抗凋亡作用。

Objective To investigate the efficacy and mechanisms of recombinant adenovirus containing c-FLIPs (cellular FLICE-inhibitory protein short) in inducing antiapoptosis activation of lymphocyte in vitro. Methods c-FLIPs gene was cloned from total RNA of lymphocyte with RT-PCR methods, then constructed recombined adenovirus Ad.c-FLIPs by pAdeasy system. H9 cells infected with Ad.c-FLIPs produced antiapoptosis derived from anti-Apo-1 antibody, and those antiapoptosis evaluated with PI stain flow cytometry (FCM) and Hoechst stain. Results c-FLIPs gene was successfully cloned from lymphocytes and incorporated into recombinant adenovirus Ad.c-FLIPs.After exposure to anti-Apo-1 for 24 h, the apoptosis of H9 cells preconditioned by Ad.c-FLIPs for 24 h as measured by Hochest stain or FCM significantly decreased, compared with non-preconditioned cells,3.60%±0.21% vs. 48.33%±7.41%, respectively, indicating that Ad.c-FLIPs preconditioning protected H9 cells against apoptosis induced by anti-Apo-1. Conclusion Recombinant adenovirus Ad.c-FLIPs effectively induced anti-apoptosis activation of lymphocyte.