Objective: To investigate the dynamic expression of protein tyrosine phosphatase SHP2 in liver tissue of rats with carbon tetrachloride (CCl(4))-induced liver fibrosis. Methods: Rat liver fibrosis model was established by intraperitoneal injection of CCl(4). Rat liver tissue histopathological changes were detected by HE and Masson-trichrome staining. Immunohistochemical staining, Western blot and real-time fluorescent quantitative PCR were used to detect SHP2 protein and mRNA expression in rat liver tissue. One-way analysis of variance was used for the comparison of means between multiple groups, and the LSD test was used for further inter-group comparison. Results: CCl(4)-induced rat liver fibrosis model was successfully constructed, and with the extension of modeling time, the degree of liver fibrosis in rats were aggravated gradually. Immunohistochemical staining results showed that SHP2 was mainly expressed in the cytoplasm of rat liver tissues. With the aggravation of liver fibrosis, the number of cells with positive expression of SHP2 was aggravated gradually (P < 0.05). Western blot and real-time fluorescent quantitative PCR results showed that the expressions of SHP2 protein and mRNA in rat fibrotic liver tissues at different times in week 2, 4, 6, and 8 were higher in modeling than control group (P < 0.05), and was aggravated gradually with the liver fibrosis aggravation (P < 0.05). Conclusion: The expression of SHP2 protein and mRNA in the liver tissue of rats with CCl(4)-induced liver fibrosis increased gradually with the degree of liver fibrosis, and the degree of increase was consistent with the degree of liver fibrosis.
目的： 探讨蛋白酪氨酸磷酸酶SHP2在四氯化碳(CCl(4))诱导的肝纤维化大鼠肝组织中的动态表达。 方法： 采用腹腔注射CCl(4)的方法建立大鼠肝纤维化模型，用HE和Masson三色染色检测大鼠肝脏组织的病理组织学变化，采用免疫组织化学染色、蛋白质印迹法及实时荧光定量PCR技术检测大鼠肝组织的SHP2蛋白及mRNA表达。多组间均数比较采用单因素方差分析，进一步组间比较采用LSD检验。 结果： 成功构建CCl(4)诱导的大鼠肝纤维化模型，随着造模时的延长，大鼠肝纤维化程度逐渐加重。免疫组织化学染色结果显示大鼠肝组织的SHP2主要表达于细胞质，随着肝纤维化程度的加重，SHP2阳性表达的细胞逐渐增多(P < 0.05)。蛋白质印迹法及实时荧光定量PCR检测结果显示，造模第2、4、6周及第8周不同时间大鼠纤维化肝组织的SHP2蛋白及mRNA表达均高于对照组(P < 0.05),并随着肝纤维化的加重逐渐增高(P < 0.05)。 结论： CCl(4)诱导的肝纤维化大鼠肝组织中SHP2的蛋白及mRNA表达均随着肝纤维化程度的加重逐渐增高,其增高程度与肝纤维化程度一致。.
Keywords: Gene expression; Liver cirrhosis; SH2 domain-containing protein tyrosine phosphatase 2.