扶正化瘀方对纤维化肝脏MMP-2活性及Ⅳ型胶原表达的影响

The Effects of Fuzheng Huayu Recipe on Collagen Ⅳ Expression and MMP-2 Activity in Rat Fibrotic Liver

目的:探讨扶正化瘀方影响基质金属蛋白酶-2活性和Ⅳ型胶原蛋白表达的抗肝纤维化作用机制。方法:二甲基亚硝胺腹腔注射4周诱导大鼠肝纤维化模型,成模后治疗组以扶正化瘀方灌胃4周。检测血清肝功能、肝脏病理学、羟脯氨酸含量;免疫组织化学方法检测肝组织Ⅳ型胶原表达;Western印迹法分析肝组织Ⅳ型胶原、基质金属蛋白酶-2/9(matrix-metalloproteinases-2,MMP-2/9)、金属蛋白酶组织抑制物-2(tissue inhibitors of metalloproteinase-2,TIMP-2)表达水平;明胶酶图法检测肝组织MMP-2/9活性。结果:与正常大鼠比较,模型大鼠血清肝功能异常、肝组织炎症明显、肝组织Ⅳ型胶原表达与沉积增加,TIMP-2蛋白表达增加,MMP-2蛋白表达变化不明显,而MMP-2活性水平明显上升。扶正化瘀方显著减轻肝脏炎症和胶原沉积;减少Ⅳ型胶原蛋白表达和沉积;降低TIMP-2蛋白表达;抑制MMP-2活性。结论:扶正化瘀方可通过抑制肝脏Ⅳ型胶原病理增生沉积、下调MMP-2活性水平、减轻肝组织的破坏与重构而发挥抗肝纤维化的作用。

Objective: To investigate the effects of Fuzheng Huayu recipe(FZHY recipe) on collagen Ⅳ expression and matrixmetalloproteinases-2(MMP-2) activity,explore the mechanisms of the recipe action against liver fibrosis.Methods: Liver fibrosis was induced by intraperitoneal injection of dimethylnitrosamine(DMN).The rats in FZHY group were administered with FZHY recipe ig for 4 weeks after the model was established.Serum ALT,AST activities,total bilirubin and Alb levels were determined using commercial kits;serum ...