摘要
探讨红杉醇对2型糖尿病大鼠肝病NADPH氧化酶亚单位p22 phox和p47 phox表达的影响。采用高脂高糖饮食加腹腔注射小剂量链脲佐菌素(streptozotocin,STZ)诱导糖尿病大鼠肝病模型,红杉醇(50、25及12.5 mg.kg 1.d 1)治疗6周。于末次给药后测定血糖、丙氨酸氨基转移酶(ALT)、天冬氨酸氨基转移酶(AST)、总抗氧化能力(T-AOC)、过氧化氢(H2O2)、NO和胰岛素(Ins)的含量;real-time PCR测定肝脏p22 phox和p47phox mRNA表达;Western blotting法测定p22 phox和p47 phox蛋白表达,HE染色观察肝脏病理变化。结果发现,红杉醇各剂量组能降低模型大鼠空腹血糖、ALT、AST、Ins和H2O2含量,恢复胰岛素敏感指数(ISI)及体重,升高肝组织T-AOC和NO含量;降低肝组织NADPH氧化酶亚单位p22 phox和p47 phox mRNA及蛋白表达,改善肝细胞病理改变(水肿、点状或灶状坏死及炎症细胞浸润)。上述结果表明,红杉醇可通过降低NADPH氧化酶表达进而改善2型糖尿病大鼠肝病的氧化应激损伤。
This study is to observe the effects of sequoyitol on the expression of NADPH oxidase subunits p22 phox and p47 phox in rats with type 2 diabetic liver diseases. The model of high fat and high sugar diet as well as intraperitoneal injection of small dose of streptozotocin （STZ, 35 mg .kg-1） induced diabetic rat liver disease was used. After sequoyitol （50, 25 and 12.5 mg-kg-1） was administrated for 6 weeks, the contents of blood glucose （BG）, alanine aminotransferase （ALT）, aspartate aminotransferase （AST）, total antioxidant capacity （T-AOC）, hydrogen peroxide （H202）, NO and insulin （Ins） were measured, liver p22 phox and p47 phox mRNA content was determined with real-time PCR and the expression of p22 phox and p47 phox protein was examined by Western blotting. In addition, pathological changes in liver were observed with HE staining. Sequoyitol could reduce the content of fasting blood glucose, ALT, AST, Ins and H 202, restore insulin sensitive index （ISI） and weight, elevate liver tissue T-AOC and NO content, reduce the NADPH oxidase subunit liver tissue p22 phox and p47 phox mRNA and protein expression, as well as ameliorate liver pathologic lesions. The results showed that sequoyitol can ease the type 2 diabetic rat liver oxidative stress by lowering NADPH oxidase expression.
出处
《药学学报》
CAS
CSCD
北大核心
2013年第4期489-494,共6页
Acta Pharmaceutica Sinica
基金
安徽省教育厅高校省级优秀青年人才基金项目(2011SQRL105)
