ANGPT2 and liver dysplastic nodule: In addition, resveratrol has beneficial effects in cultured podocytes and ECs by ameliorating the HG-induced expression of VEGF and Flk-1, but these effects are abolished by knocking down sirtuin-1 [115].These findings suggest that sirtuin-1 can attenuate abnormal angiogenesis in DN by modulating VEGF, Flk-1, and angiopoietin 2.