Abstract
Resveratrol (RSV) has beneficial effects on renal diseases, but its underlying mechanisms are still unclear. In the present study, we investigate the renoprotective effects of RSV on obesity-related renal diseases and clarify the potential mechanisms. Male C57BL/6J mice were fed with high-fat diet (HFD) with or without 400 mg/kg RSV treatment for 12 weeks. Feeding HFD induced renal injuries, but treating them with RSV significantly decreased glomerular volume (p < 0.05), glycogen (p < 0.01) and collagen (p < 0.05) in renal tissues. Although slightly changed body weight and fasting blood glucose, RSV attenuated renal dysfunction, including decreased levels of blood urea nitrogen (p < 0.05), urea protein (p < 0.01), and microalbuminuria (p < 0.01). Furthermore, RSV treatment markedly reduced gene expression of tumor necrosis factor (TNF)-α, interleukin (IL)-6 and inducible nitric oxide synthase (iNOS) (all p < 0.05), 4-Hydroxynonenal expression (p < 0.01), and lipid accumulation. Mechanistically, RSV enhanced the expression of lipolytic genes, peroxisome proliferator-activated receptor (PPAR)-α (p < 0.001), carnitine palmitoyltransferase (CPT)-1 (p < 0.05), and medium-chain acyl-coenzyme A dehydrogenase (MCAD) (p < 0.01), but had no effect on lipogenic genes, PPAR-γ and sterol regulatory element-binding protein (SREBP)-1c. RSV also obviously increased renal PPAR-α protein expression (p < 0.001) and the phosphorylation of AMPK level. Collectively, these results support the therapeutic effects of RSV on high-fat diet-induced renal damages at least partially through targeting on PPAR-α signaling pathway.
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The authors thank Dr Shan Lu for technical support in the animal studies.
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Zhou, Y., Lin, S., Zhang, L. et al. Resveratrol prevents renal lipotoxicity in high-fat diet-treated mouse model through regulating PPAR-α pathway. Mol Cell Biochem 411, 143–150 (2016). https://doi.org/10.1007/s11010-015-2576-y
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DOI: https://doi.org/10.1007/s11010-015-2576-y