方法：培养人晶状体上皮细胞系HLE-B3并给予H₂O₂刺激。24h后，提取细胞总RNA进行基因表达谱芯片检测，并采用生物信息学数据库DAVID对氧化刺激组相比对照组显著上调的基因进行Gene Ontology(GO)功能富集分析。RT-qPCR对上调的基因进行验证。通过MTT和流式细胞仪检测细胞凋亡水平。

结果：表达谱芯片结果显示，氧化刺激造成HLEC中367个基因上调，GO分析表明这些基因富集于310个功能类别中，主要包括p53信号通路、细胞凋亡通路、细胞程序性死亡通路等。RT-qPCR结果证实，6个主要参与促凋亡或抗凋亡调节的基因，包括BCL2A1、TP53I3、FAS、ZMAT3、DDB2和BCL2L1，在氧化刺激后表达水平明显上升。MTT实验和流式细胞仪检测结果显示，H₂O₂刺激后HLEC凋亡逐渐上升，是细胞氧化损伤的主要表现。

结论：氧化刺激可同时诱导HLEC中促凋亡基因和抗凋亡基因表达水平上调，但最终仍然导致了细胞凋亡。

METHODS:Human lens epithelial cell line(HLE-B3)were cultured in normal condition or with H₂O₂ for 24h. Total RNA were extracted for gene expression profiling assay and gene ontology analysis was performed for the significantly up-regulated genes using bioinformational database DAVID. The elevated expressions of up-regulated genes in HLEC after oxidative stimulation were confirmed by RT-qPCR. The apoptosis of HLEC induced by oxidative damage was detected using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide(MTT)assay and flow cytometry.

RESULTS:Gene expression profiling assay demonstrated that 367 genes were up-regulated in HLEC after oxidative stimulation. These genes were enriched in 310 biological processes mainly associated with p53-related signaling pathways, apoptosis, programed cell death and etc. Six genes mainly pro- or anti-apoptotic, including BCL2A1,TP53I3,FAS,ZMAT3,DDB2 and BCL2L1, were confirmed to be up-regulated by oxidative stimulation using RT-qPCR(P<0.05). Results of MTT assay and flow cytometry showed that apoptosis of HLEC gradually appeared after cells were treated with H₂O₂ and became the main consequence of oxidative stimulation.

CONCLUSION:Oxidative stimulation can induce up-regulation of proapoptotic genes and lead to apoptosis of HLEC, even though antiapoptotic genes can also be promoted.