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首页> 外文期刊>Biological & pharmaceutical bulletin >Effects of Angiotensin Receptor Blocker on Oxidative Stress and Cardio-Renal Function in Streptozotocin-Induced Diabetic Rats
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Effects of Angiotensin Receptor Blocker on Oxidative Stress and Cardio-Renal Function in Streptozotocin-Induced Diabetic Rats

机译:血管紧张素受体阻滞剂对链脲佐菌素诱导的糖尿病大鼠氧化应激和心肺功能的影响

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The important role of renin-angiotensin-aldosterone system blockade in the treatment of diabetes-induced cardiomyopathy and nephropathy has been clearly established. The present stud), examined the effect of angiotensin 11 type I receptor blocker (ARB) losartan on oxidative stress and cardio-renal function in streptozotocin (STZ)-induced diabetic rats. Losartan treatment resulted in improvement of myocardial function and suppressed cardiac and renal fibrosis compared with the diabetic group. Losartan treatment also down-regulated transforming growth factor-beta 1 expression and attenuated the increased expression levels of p22(phox) and Nox4. Blood urea nitrogen (BUN) and urinary protein levels were increased significantly in the diabetic group. Losartan treatment significantly reduced proteinuria but not BUN level. Moreover, the elevated level of malondialdehyde in both heart and kidney were significantly reduced in the losartan-treated group compared with the diabetic group. These results provided evidence that oxidative stress plays a major role in diabetic rats induced by STZ, and treatment with the ARB might be beneficial for preventing the development and progression of diabetic disease.
机译:已经清楚地确定了肾素-血管紧张素-醛固酮系统阻滞在治疗糖尿病引起的心肌病和肾病中的重要作用。本研究)检查了血管紧张素11型I受体阻滞剂(ARB)氯沙坦对链脲佐菌素(STZ)诱导的糖尿病大鼠的氧化应激和心肾功能的影响。与糖尿病组相比,氯沙坦治疗可改善心肌功能并抑制心脏和肾脏纤维化。氯沙坦治疗还下调了转化生长因子β1的表达,并减弱了p22(phox)和Nox4表达水平的提高。糖尿病组的血尿素氮(BUN)和尿蛋白水平显着增加。氯沙坦治疗可显着降低蛋白尿,但不能降低BUN水平。此外,与糖尿病组相比,氯沙坦治疗组心脏和肾脏中丙二醛水平的升高明显降低。这些结果提供了证据,氧化应激在STZ诱导的糖尿病大鼠中起主要作用,而ARB的治疗可能对预防糖尿病疾病的发展和进展有益。

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