Dietary restriction ameliorates diabetic nephropathy through anti-inflammatory effects and regulation of the autophagy via restoration of Sirt1 in diabetic Wistar fatty (fa/fa) rats: a model of type 2 diabetes.

Dietary restriction ameliorates diabetic nephropathy through anti-inflammatory effects and regulation of the autophagy via restoration of Sirt1 in diabetic Wistar fatty (fa/fa) rats: a model of type 2 diabetes.
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DOI:
10.1155/2011/908185
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发表时间:
2011
影响因子:
--
通讯作者:
Koya D
Koya D
中科院分区:
其他
文献类型:
--
作者:
Kitada M;Takeda A;Nagai T;Ito H;Kanasaki K;Koya D

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目的。尽管饮食限制 (DR) 对寿命、与年龄相关的疾病(包括糖尿病和心血管疾病)有有益影响,但其对 2 型糖尿病肾病的影响仍不清楚。本研究检查了 DR 对 Wistar 脂肪 (fa/fa) 大鼠 (WFR) 的肾脏保护作用。 方法。 WFR 接受 DR(40% 限制)治疗 24 周。评估了尿白蛋白排泄、肌酐清除率、肾脏组织学、乙酰化 NF-κB (p65)、Sirt1 蛋白表达和肾皮质中 p62/Sqstm 1 积累,以及近端肾小管细胞中线粒体形态和自噬体的电子显微镜观察。 结果。 DR 改善了肾脏异常,包括 WFR 中的炎症。 DR 改善了 WFR 中 Sirt1 水平的降低、乙酰化 NF-κB 的增加以及自噬受损。 结论。 DR通过恢复WFR肾脏中的Sirt1发挥抗炎作用并改善自噬失调,从而改善2型糖尿病的肾损伤。
Aim. Despite the beneficial effects of dietary restriction (DR) on lifespan, age-related diseases, including diabetes and cardiovascular diseases, its effects on type 2 diabetic nephropathy remain unknown. This study examined the renoprotective effects of DR in Wistar fatty (fa/fa) rats (WFRs). Methods. WFRs were treated with DR (40% restriction) for 24 weeks. Urinary albumin excretion, creatinine clearance, renal histologies, acetylated-NF-κB (p65), Sirt1 protein expression, and p62/Sqstm 1 accumulation in the renal cortex, as well as electron microscopic observation of mitochondrial morphology and autophagosomes in proximal tubular cells were estimated. Results. DR ameliorated renal abnormalities including inflammation in WFRs. The decrease in Sirt1 levels, increase in acetylated-NF-κB, and impaired autophagy in WFRs were improved by DR. Conclusions. DR exerted anti-inflammatory effects and improved the dysregulation of autophagy through the restoration of Sirt1 in the kidneys of WFRs, which resulted in the amelioration of renal injuries in type 2 diabetes.
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