%0 Journal Article
%T [Study of the negative regulation of transforming growth factor beta type II receptor to inhibit the occurrence and development of liver fibrosis with miR-217].
%A Guo YW
%A Pang PJ
%A Sun YK
%A Guo YW
%A Pang PJ
%A Sun YK
%J Zhonghua Gan Zang Bing Za Zhi
%V 30
%N 7
%D Jul 2022 20
%M 36038346
暂无%R 10.3760/cma.j.cn501113-20200203-00026
%X Objective: To observe the effect of miR-217 on angiotensin II (AngII)-induced hepatic stellate cells (HSCs) activation, and carbon tetrachloride (CCl4)-induced overexpression in mice, so as to clarify miR-217 role in liver fibrosis. Methods: HSCs were stimulated with AngⅡ and the changes condition in the expression level of miR-217 were detected. HSCs were divided into control group, AngII-treated group and AngⅡ+miR-217-treated group. The expression levels of alpha-smooth muscle actin, fibroblast-specific protein 1 and collagen Ⅰ (Collagen Ⅰ) in each group were detected. The target gene of mir-217 was screened and verified by Targetscan and Dual luciferase gene reporter assay. Real-time quantitative PCR and Western blot were used to detect the effect of miR-217 on the expression level of transforming growth factor beta type Ⅱ receptor (TGFBR2). A CCl4-induced mouse liver fibrosis model was constructed. Masson staining and Sirius red staining were used to detect the effect of miR-217 overexpression on the progression of liver fibrosis in CCl4 mice. Data of two groups were compared using t-test. Data of multiple groups were statistically analyzed with one-way ANOVA. Results: The expression level of miR-217 was downregulated by AngⅡ-stimulated HSC cells. The expression levels of α-smooth muscle actin, fibroblast-specific protein 1 and Collagen Ⅰ induced by AngⅡ was inhibited by miR-217 mimics transfection. The 3'-UTR of TGFBR2 had specifically bind miR-217. The mRNA and protein expression levels of TGFBR2 was inhibited with miR-217 mimics transfection in HSCs. The overexpression of miR-217 had inhibited the expression levels of Collagen Ⅰ and Ⅲ in CCl4 mice and alleviated the progression of liver fibrosis . Conclusion: miR-217 regulates liver fibrosis by targeting TGFBR2, inhibits AngII-induced HSC activation, and slows down the process of liver fibrosis in CCl4 mice, suggesting that miR-217 may have an inhibitory effect on liver fibrosis.<BR>目的： 观察miR-217对血管紧张素Ⅱ（AngⅡ）诱导的肝星状细胞（HSC）活化的影响，观察四氯化碳（CCl4）诱导小鼠中miR-217过表达产生的效果，阐明miR-217在肝纤维化中的作用。 方法： 使用AngⅡ刺激HSC并检测miR-217表达水平的变化情况。将HSC分为对照组、AngⅡ处理组和AngⅡ+miR-217处理组，检测各组中α-平滑肌肌动蛋白，成纤维细胞特异蛋白1和Ⅰ型胶原蛋白（Collagen I）的表达水平。采用TargetScan和双荧光素酶报告基因实验对miR-217的靶基因进行筛选及验证。荧光实时定量PCR和Western blot检测miR-217对转化生长因子β受体Ⅱ（TGFBR2）表达水平的影响。构建CCl4诱导的小鼠肝纤维化模型，Masson染色和天狼星红染色检测过表达miR-217对CCl4小鼠肝纤维化进程的影响。2组数据间的比较采用t检验，多组数据比较采用One-Way ANOVA进行统计分析。 结果： AngⅡ刺激HSC细胞能下调miR-217的表达水平，转染miR-217 mimics能抑制AngⅡ诱导的α-平滑肌肌动蛋白，成纤维细胞特异蛋白1和Collagen I的表达水平。miR-217能特异性结合TGFBR2的3’-UTR，转染miR-217 mimic能抑制HSC中TGFBR2的mRNA和蛋白表达水平。CCl4小鼠中过表达miR-217能抑制Collagen I和Collagen Ⅲ的表达水平，缓解肝纤维化进程。 结论： miR-217通过靶向调控TGFBR2调节肝纤维化，抑制AngⅡ诱导的HSC活化，减缓CCl4小鼠的肝纤维化进程，表明miR-217可能具有抑制肝纤维化的功能。.