HPV16 E6 下调 DHRS2 表达可介导宫颈上皮细胞的致癌转化  

HPV16 E6 mediates oncogenic transformation of cervical epithelial cells by downregulating DHRS2 expression

作　　者：杜秀蓉 陶沐珩 贾永琴 伍婷婷 凌开建 王延洲 梁志清 DU Xiurong;TAO Muheng;JIA Yongqin;WU Tingting;LING Kaijian;WANG Yanzhou;LIANG Zhiqing(Department of Obstetrics and Gynecology,First Affiliated Hospital,Army Medical University(Third Military Medical University),Chongqing,400038,China)

机构地区：[1]陆军军医大学(第三军医大学)第一附属医院妇产科,重庆400038

出　　处：《陆军军医大学学报》2024年第7期715-724,共10页Journal of Army Medical University

基　　金：国家重点研发计划(2019YFC1005202)。

摘　　要：目的探讨HPV16 E6对宫颈上皮细胞基因及信号通路的影响,筛选与致癌转化相关的基因。方法构建HPV16 E6感染的正常人宫颈上皮细胞(HUCEC)模型,进行转录组测序筛选差异表达基因(differentially expressed genes,DEGs),并进行基因本体(Gene Ontology,GO)和京都基因和基因组(Kyoto Encyclopedia of Genes and Genomes,KEGG)富集分析差异信号通路。采用RT-qPCR验证主要差异下调表达基因。对主要差异基因的蛋白结构与HPV16 E6蛋白进行分子对接预测分析,通过RT-qPCR及Western blot验证HUCEC细胞模型中主要差异基因表达情况,并采用RT-qPCR及Western blot实验在宫颈癌细胞系SiHa及CaSki中进一步验证差异基因的表达。结果共筛选出差异表达2倍以上的基因55个。本研究聚焦下调差异基因,结果表明:负调控的差异基因GO功能富集于氧化还原过程;KEGG富集分析主要与碳水化合物代谢及癌症等相关。10个差异基因mRNA下调表达趋势与测序结果基本一致。分子对接预测DHRS2与HPV16 E6蛋白存在相互作用。与对照组比较,HUCEC细胞模型中HPV16 E6下调DHRS2的mRNA(P<0.01)和蛋白(P<0.05)、ETV5的蛋白(P<0.01)表达;在SiHa、CaSki细胞系中,与对照组比较,DHRS2的mRNA及蛋白表达亦明显下调(P<0.05),并与P53蛋白表达趋势正相关。结论HPV16 E6可能通过下调DHRS2表达介导宫颈细胞致癌转化,促进宫颈癌发生。Objective To explore the effects of HPV16 E6 on genes and signaling pathways in cervical epithelial cells and to screen genes associated with oncogenic transformation.Methods HUCEC models infected with HPV16 E6 were constructed,and transcriptome sequencing was performed to screen for differentially expressed genes(DEGs),which were subjected to Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment to analyze the differential signaling pathways.RT-qPCR was used to validate major differentially down-regulated expressed genes.After predicting the major differentially expressed proteins by molecular docking analysis,the expression of major differential genes in HUCEC cell model was verified by RT-qPCR and Western blotting.In addition,RT-qPCR and Western blotting were used to further verify the expression of major differential genes in cervical cancer cell lines,SiHa and CaSki.Results A total of 55 genes with more than two-fold differential expression were screened.The results centering on down-regulated genes showed that the negatively regulated differential gene was mainly enriched in redox processes;KEGG enrichment analysis revealed that it was mainly associated with carbohydrate metabolism and cancer.RT-qPCR results showed that the down-regulated differential expression trends of the selected 10 genes were basically consistent with the sequencing results.Molecular docking analysis predicted an interaction between DHRS2 and HPV16 E6,and RT-qPCR and Western blotting confirmed that HPV16 E6 down-regulated DHRS2 mRNA(P<0.01)and protein(P<0.05)and ETV5 protein expression(P<0.01).In SiHa and CaSki cells,compared with the control group,the mRNA and protein expression of DHRS2 was downregulated and positively correlated with the trend of P53 protein expression(P<0.05).Conclusion HPV16 E6 can mediate oncogenic transformation of cervical cells and promote cervical carcinogenesis through downregulating DHRS2 expression.

关 键 词：HPV16 E6 DHRS 2 宫颈上皮细胞 致癌转化 宫颈癌 

分 类 号：R373.9[医药卫生—病原生物学] R394.3[医药卫生—基础医学] R737.33