【摘要】 目的研究原花青素对乙醇导致肝脏损伤的保护作用机制。方法将昆明种小鼠分为正常对照组、乙醇对照组、原花青素低剂量组(100mg/kg)和高剂量组(300mg/kg),观察各组小鼠血清丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶(AST)以及肝匀浆中丙二醛(MDA)、超氧化物歧化酶(SOD)和活性氧(ROS)等指标水平,并采用逆转录-聚合酶链反应(RT-PCR)检测肝组织Cu,Zn-SOD和toll样受体4(TLR4)的mRNA水平。结果原花青素低、高剂量组与乙醇对照组比较,ALT、MDA、ROS明显降低(P<0.01),SOD明显升高(P<0.01),并可使Cu,Zn-SODmRNA的表达上调和TLR4mRNA的表达下调。结论原花青素对小鼠乙醇性肝损伤的保护作用与增强Cu,Zn-SOD的表达、抑制TLR4的表达有关。更多还原

【Abstract】 Objective To study the mechanism of protective effects of procyanidins on liver injury model induced by alcohol in mice. Methods Mice were divided into 3 groups to set up the model of liver injury induced by alcohol in mice: the group of liver injury induced by alcohol, the group of procyanidins with low doses (100mg/kg), the group of procyanidins with high doses(300mg/kg). Then established normal group of control. The model of liver injury induced by alcohol in mice was used to investigate the protective effects at low and high doses procyanidins in serum indicated by alanine aminotransferase (ALT), asparate aminotransferase (AST) and in liver homogenate indicated by malonaldehyde (MDA), superoxide dismutase (SOD), reactive oxygen species (ROS). The levels of Cu,Zn-SOD mRNA in hepatic tissue and toll like receptor 4 (TLR4) mRNA were determined by using reverse transcription polymerase chain reaction (RT-PCR) technique. Results The procyanidins with low and high doses could reduce ALT,MDA,ROS content and increase SOD level, up-regulate the expression of Cu, Zn-SOD mRNA and down-regulate the expression of TLR4 mRNA. Conclusion Mechanism of the protective effects on liver injuries of mice induced by alcoholmay be associated with promoting the expression of Cu,Zn-SOD and suppressing the expression of TLR4 mRNA.更多还原