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The effect of resveratrol on FoxO1 expression in kidneys of diabetic nephropathy rats

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Abstract

Reactive oxygen species production has recently been established as an essential contributor in the development of diabetic nephropathy (DN). Resveratrol, a natural anti-oxidants with biological activity, is known to be an activator of sirtuin1 (Sirt1). Forkhead transcription factor O1 (FoxO1) plays a role not only in regulating metabolism but also in oxidant stress. The present study was carried out to examine whether resveratrol had protective effect on diabetic kidney by modulation of the Sirt1/FoxO1 pathway. To investigate the effect of FoxO1 on oxidant stress, male Sprague–Dawley rats were injected with a single dose of 60 mg/kg streptozotocin (STZ) to induce diabetes. Here we show that the FoxO1 activity was significantly reduced and with a concomitant decrease in the expression of FoxO1 target gene, catalase in diabetic kidney. The FoxO1 downregulation correlated with an increase in the generation of malondialdehyde (MDA), a decrease in the activity of SOD and an increase in the expression of collagen IV and fibronectin proteins in renal cortex of diabetic rats. Treatment with the sirtuin agonist resveratrol, with an increase in the expression of Sirt1, significantly increased FoxO1 activity in diabetic kidney. This correlated with a decrease in the generation of MDA, an increase in the activity of SOD, a partial reversal of collagen IV and fibronectin proteins levels and more improved kidney pathological and biochemical indicators changes. Together these results indicate that it is characterized by decreased activity of FoxO1 in diabetic kidney. These data also suggest that modulation of the Sirt1/FoxO1 pathway may be a potentially useful therapeutic target for DN.

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Acknowledgments

This study was supported in part by the grants from the National Natural Science Funds of China (No. 51020009). We thank Mr. Shan-Feng Zhang and Mrs. Xiu-Hua Ren at Basic Medical College of Zhengzhou University for their insightful advice and technical assistance. We also thank Dr. Sheng-Jun Zhang at Medical College of Zhengzhou University for his insightful critique of the manuscript.

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Authors and Affiliations

  1. Division of Endocrinology, Department of Internal Medicine, The First Affiliated Hospital of Zhengzhou University, 40 Daxue Road, Zhengzhou, 450052, People’s Republic of China

    Lina Wu, Yinghui Zhang, Xiaokun Ma, Na Zhang & Guijun Qin

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  1. Lina Wu
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  2. Yinghui Zhang
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  3. Xiaokun Ma
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  4. Na Zhang
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  5. Guijun Qin
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Correspondence to Guijun Qin.

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Wu, L., Zhang, Y., Ma, X. et al. The effect of resveratrol on FoxO1 expression in kidneys of diabetic nephropathy rats. Mol Biol Rep 39, 9085–9093 (2012). https://doi.org/10.1007/s11033-012-1780-z

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  • DOI: https://doi.org/10.1007/s11033-012-1780-z

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