差异表达microRNA参与刀豆蛋白A诱导的自身免疫性肝炎小鼠模型肝损伤的功能分析  

A functional analysis of differentially expressed microRNAs involved in liver injury in mice with autoimmune hepatitis induced by concanavalin A

作　　者：郝健亨 李振城 刘莹 侯艺文 高艳 苗宇船 刘杨 郝慧琴 HAO Jianheng;LI Zhencheng;LIU Ying;HOU Yiwen;GAO Yan;MIAO Yuchuan;LIU Yang;HAO Huiqin(School of Basic Medical Sciences, Shanxi University of Chinese Medicine, Jinzhong, Shanxi 030619, China)

机构地区：[1]山西中医药大学基础医学院,山西晋中030619

出　　处：《临床肝胆病杂志》2021年第6期1360-1367,共8页Journal of Clinical Hepatology

基　　金：山西省教育厅科技创新项目(2020L0423);山西中医药大学科技创新能力培育计划项目(2020PY-JC-07);山西省应用基础研究计划面上项目(201901D111333);基于炎症反应的重大疾病创新药物山西省重点实验室开放课题基金资助项目(SXIDL-2018-07);山西省卫生健康委科研课题计划(2018002)。

摘　　要：目的探讨了刀豆蛋白A(ConA)诱导的自身免疫性肝炎(AIH)小鼠模型肝损伤发生发展过程中差异表达microRNA(miRNA)的变化和潜在作用。方法健康雄性SPF级C57BL/6小鼠8只,随机分为模型组(n=4)和对照组(n=4)。模型组按15 mg/kg的剂量给予尾静脉注射ConA,对照组给予等剂量生理盐水,造模8 h后处死全部小鼠,提取肝组织总RNA,采用基因芯片筛选差异表达miRNA,并对表达上调及表达下调的miRNA进行靶基因预测和功能分析。两组间比较采用独立样本t检验鉴定差异表达的miRNA。结果主成分分析结果显示,基因芯片中所提取数据的组间差异满足进一步分析的条件。与对照组比较,模型组小鼠肝脏中共检测到31个上调和18个下调表达的miRNA,与959个(601个上调,358个下调)靶基因存在调控关系。GO分析显示,与对照组比较,模型组中表达上调miRNA的靶基因主要具备“DNA binding”(P值=1.47×10-6)等分子功能,参与“transcription,DNA-templated”(P=2.36×10-7)等生物学过程,并主要富集在“neuronal cell body”(P=5.99×10-6)等细胞组分。表达下调miRNA的靶基因主要具备“RNA polymeraseⅡproximal promoter sequence-specific DNA binding”(P=2.49×10-6)等分子功能,参与“regulation of transcription,DNA-templated”(P=1.64×10-11)等生物过程,并主要富集在“nucleoplasm”(P=4.30×10-10)等细胞组分。KEGG通路分析结果表明上调靶点主要涉及“Endocytosis”(P=0.0004)等,下调靶点主要涉及“Hippo信号通路”(P=0.004)。结论AIH的发病中存在miRNA差异表达,这些miRNA差异表达谱可以为AIH的临床治疗提供新的靶点。Objective To investigate the changes and potential effects of differentially expressed microRNAs(miRNAs)in the development and progression of liver injury in a mouse model of autoimmune hepatitis(AIH)induced by concanavalin A(ConA).Methods Eight healthy male specific pathogen-free C57BL/6 mice were randomly divided into model group and control group,with four mice in each group.The mice in the model group were given tail vein injection of ConA 15 mg/kg,and those in the control group were given an equal volume of normal saline.All mice were sacrificed after 8 hours of modeling,Total RNA in liver tissue was extracted,gene microarray was used to screen out differentially expressed miRNAs,and target prediction and function analysis were performed for upregulated and downregulated miRNAs.The independent samples t-test was used for comparison of differentially expressed miRNAs between two groups.Results The principal component analysis showed that the inter-group difference of the data extracted by gene microarray met the conditions for further analysis.Compared with the control group,the model group had 31 upregulated miRNAs and 18 downregulated miRNAs in mouse liver,which had a regulatory relationship with 959 target genes(601 upregulated genes and 358 downregulated genes).GO analysis showed that in the model group,the target genes of the upregulated miRNAs mainly had the molecular functions such as“DNA binding”(P=1.47×10-6),participated in the biological processes such as“transcription,DNA-templated”(P=2.36×10-7),and were mainly enriched in the cellular components such as“neuronal cell body”(P=5.99×10-6),while the target genes of the downregulated miRNAs had the molecular functions such as“RNA polymerase II proximal promoter sequence-specific DNA binding”(P=2.49×10-6),participated in the biological processes such as“regulation of transcription,DNA-templated”(P=1.64×10-11),and were mainly enriched in the cellular components such as“nucleoplasm”(P=4.30×10-10).KEGG pathway enrichment analy

关 键 词：肝炎 自身免疫性 微RNAS 计算生物学 

分 类 号：R575.1[医药卫生—消化系统]