狭基线纹香茶菜对免疫肝损伤小鼠ICAM-1mRNA和蛋白表达的影响

目的:以Con A诱导小鼠免疫性肝损伤模型,研究狭基线纹香茶菜对免疫肝损伤小鼠ICAM-1mRNA和蛋白表达的影响,探讨其抗免疫肝损伤的作用机理。方法:小鼠尾静脉注射ConA 25mg/kg制备免疫肝损伤模型,灌胃给予狭基线纹香茶菜水提物7d后,不同时间点取血检测血清ALT、AST水平,取肝组织,提取总RNA反转录聚合酶链式反应(RT-PCR)对肝脏ICAM-1mRNA进行半定量测定,免疫组化法检测肝组织ICAM-1蛋白的表达。结果:与正常对照组相比,模型组小鼠血清AST、ALT水平明显高于正常组,狭基线纹香茶菜水提物9.2g/kg可明显降低肝损伤小鼠血清ALT、AST水平。肝组织4h ICAM-1 mRNA和蛋白表达显著增强,至8h仍保持较高的表达。阳性药PDTC和狭基线纹香茶菜水提物大剂量组ICAM-1mRNA和蛋白表达显著低于模型组。结论:ConA损伤后,血清ALT、AST水平升高,肝组织中ICAM-1mRNA和蛋白表达明显增强,狭基线纹香茶菜组可通过降低损伤肝组织ICAM-1mRNA和蛋白的表达,而对免疫肝损伤小鼠起保护作用,这可能是其护肝降酶作用机理之一。

Study on mRNA and protein expression of ICAM-1 of mice with immune injury treated by water-soluble extract from Isodon lophanthoides var.gerardianus (Benth.) Har.

Objective: Immune liver injury model was induced by ConA to observe influence of water-soluble extract from Isodon lophanthoides var.ge-rardianus on ICAM-1mRNA and protein expression,aiming to explore its mechanism of protective action against liver injury.Methods: Mice were challenged by a single tail intravenous injection of ConA(25mg/kg) to induce immnuce liver injury,meanwhile,water-soluble extract from Isodon lophanthoides var.gerardianus is administrated to mice for 7days,we collected blood and liver ...