纤维化淤胆性肝炎肝组织基质金属蛋白酶1及金属蛋白酶组织抑制因子1的表达

目的观察纤维化淤胆性肝炎(FCH)患者肝组织基质金属蛋白酶1(MMP1)和金属蛋白酶组织抑制因子1(TIMP1)的表达以及胶原蛋白的沉积,从胶原降解的角度探讨FCH肝纤维化的发病机制。方法肾移植术后乙型肝病毒(HBV)相关性FCH肝组织标本9例,正常肝组织标本5例作对照。用免疫组化方法检测肝组织MMP1、TIMP1及I、III型胶原的表达。结果与对照组比较,FCH组的MMP1、TIMP1及I、III型胶原蛋白表达显著增加,肝组织I、III型胶原蛋白表达与TIMP1/MMP1比值呈正相关。结论肾移植术后HBV相关性FCH患者肝纤维化的发生与金属蛋白酶抑制因子增加,间质胶原蛋白的分解降低有关。

Expression of matrix metalloproteinase 1 and tissue inhibitor of metalloproteinase 1 in biopsy liver from patients with fibrosing cholestatic hepatitis

Objective To explore the fibrosis mechanism of patients with fibrosing cholestatic hepatitis(FCH) in the way of degradation of collagen.Methods The expressions of matrix metalloproteinase 1(MMP1) and tissue inhibitor of metalloproteinase 1(TIMP1),and contents of type I,III collagen proteins were detected by immunohistochemical staining in the liver tissues of 9 cases with FCH associated with HBV developed following renal transplantation and 5 cases without liver disease as controls.Results The expressions of MMP1 and TIMP1,and type I,III collagen proteins in the patients with FCH were significantly higher than those in the control group.There was a positive correlation between the expressions of type I,III collagen proteins and TIMP1/ MMP1 ratio.Conclusion Hepatic fibrosis in the patients with FCH associated with HBV developed following renal transplantation may be relative to the increase of TIMP1 expression which inhibit the degradation of collagen.