银杏叶提取物对早期糖尿病肾病大鼠肾脏保护作用机制研究
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摘要
目的观察银杏叶提取物对早期糖尿病肾病(DN)大鼠炎性反应表达的影响,探讨银杏叶提取物保护糖尿病肾病肾脏的部分机制。方法成年雄性Wistar大鼠随机分成对照组、糖尿病组和银杏叶提取物。采用腹腔注射链脲佐菌素的方法建立DN模型,银杏叶组灌胃银杏叶片溶液96 mg/(kg·d),并于实验12周时对动物进行处理,ELISA方法检测白细胞介素-6(IL-6)、晚期糖基化终产物(AGEs)、血浆Nod样受体蛋白-3(NLRP3)水平及免疫组织化学检测肾组织纤连蛋白和胶原Ⅳ蛋白水平的变化,并对部分肾脏标本进行肾脏肥大指数检测。结果 1)与对照组比较,模型组BUN和Cr水平均升高(P <0.05);与模型组比较,银杏叶组BUN和Cr浓度明显下降(P <0.01或P <0.05);2)与对照组相比较,模型组IL-6、AGEs、NLRP3表达水平均增高(P <0.05);与模型组比较,银杏叶组IL-6、AGEs、NLRP3表达水平均明显下降(P <0.01);3)与对照组相比较,模型组FN、CoⅣ蛋白表达水平均增高(P <0.05)。与模型组比较,银杏叶组FN、CoⅣ蛋白表达水平均明显下降(P <0.01)。结论炎性反应参与了DN的发病发展,银杏叶提取物可能通过抑制NLRP3炎症小体激活和AGEs-RAGE相互作用,对DN大鼠起到肾脏保护作用。
        
引文
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