乌药对急性酒精性肝损伤的保护作用及机制初探

目的 探讨乌药对急性酒精性肝损伤的保护作用和可能机制. 方法 将40只SD大鼠随机分为正常对照组、模型对照组、联苯双酯组以及乌药醇提物组. 各组分别于末次给药后测定血丙氨酸转氨酶( ALT )、天门冬氨酸转氨酶(AST)、超氧化物歧化酶(SOD)及丙二醛(MDA)水平;处死大鼠后制备肝匀浆,分别检测 SOD和 MDA水平;HE染色法观察大鼠肝病理学变化,免疫组化法检测肝组织核因子-κB ( NF-κB)及肿瘤坏死因子-α( TNF-α)、白细胞介素1β( IL-1β)表达. 结果 与模型对照组比较,乌药醇提取物组大鼠血清中ALT、AST、MDA水平显著降低,血清SOD活性及肝组织SOD活性升高,差异有统计学意义(P<0. 05). 乌药醇提取物组肝组织中IL-1β及NF-κB、TNF-α表达降低. 结论乌药醇提取物可提高急性酒精中毒性肝组织的 SOD 活性,增加抗氧化能力,并可降低肝细胞炎症因子,可能对酒精性肝损伤具有保护作用.

Protective effects of linderae on alcoholic-induced acute liver injury in SD rats

Objective To study the effects of linderae on alcoholic-induced acute liver injury in SD rats. Methods Forty SD rats were randomly divided into normal group, model group, biphenyl double ester group,and radix lin-derae group. The levels of serum alanine aminotransferase ( ALT) ,aspartate aminotransferase ( AST) were detected with routine laboratory methods using an autoanalyzer. Histopathological changes were assessed by HE. The activities of superoxidedismutase ( SOD) and the level of malondialdehyde ( MDA) in liver homogenates were measured by spectrophotometry. The expression of interleukin-1β( IL-1β) ,nuclear factor-κB( NF-κB) , and tumor necrosis fac-tor-α ( TNF-α) in the liver were analyzed by immunohistochemistry. Results Compared with the normal group, the levels of serum ALT, AST in rats treated with radix linderae were significantly decreased. The activity of serum and liver tissue SOD was significantly increased. Furthermore, the levels of IL-1β, NF-κB and TNF-αwere signifi-cantly decreased after treatment with radix linderae ( P<0. 05 ) . Conclusion The results of our study indicate that extracts from radix linderae alleviate alcoholic liver injury, in part maybe by improving the SOD activity of liver tis-sue and by increasing the antioxidant capacity. Meanwhile, the ability of linderae to reduce proinflammatory cyto-kine has a direct protective effect on hepatocytes.