摘要：目的探讨血管紧张素Ⅱ受体拮抗剂氯沙坦对糖尿病大鼠肾小球病变的保护作用及其机制。方法观察氯沙坦对糖尿病鼠肾血流量、肾脏体积及尿蛋白排泄的影响，以及对血、肾组织局部一氧化氮(NO)，内皮素(ET)、转化生长因子-β(TGP-β1)含量的影响。结果氯沙坦可降低尿白蛋白、β2，微球蛋白(β2-m)排泄率，肌酐清除率(Ccr)及阻遏早期肾小球肥大，且不同程度降低肾组织局部NO、ET含量，大剂量氯沙坦还能降低尿液中TGP-β1含量。结论氯沙坦对糖尿病肾脏有保护作用，此作用可能与氯沙坦降低肾组织局部NO、ET及TCF-β1水平有关。

Protective effects of Iosartan on diabetic glomerulopathy in sTZ-induced diabetic rats

lU Xiaohua,FENG Lie,XU Minhua(the First Affiliated Hospital of Medical College , Jinan University , Guangzhou 510630, China)

Abstract：Objective To evaluate the protective effects of specific antagonists of angiotensin Ⅱ receptor losartan on the kidneys of diabetic rats and study their mechanisms. Methods Changes of urinary albumin, β2-m excretion, creatinine clearance(Ccr), NO, ET level of plasma,urine and renal tissue, serum and urinary TGF-β1 concentration and mean glomerular volume were measured. Results Losartan could correct elevated urinary albumin, β2-m excretion, Ccr and mean glomerular volume. Urinary and renal tissue NO, ET concentration decreased after diabetic rats received iosartan. Large doses of losartan also reduced urinary TGF-β1 level. Conclusion Losartan can protect the kidney of diabetic rats and the decrease of NO, ET, TGF-β1 concentration in renal tissue may be a mechanism for this action.

Keywords：Diabetic glomerulopathy; Nitric oxide; Endothelin; Transforming growth factor-β; Losartan参考文献：

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收稿日期：1999-08-28