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Resveratrol improves uric acid-induced pancreatic β-cells injury and dysfunction through regulation of miR-126.
Biomedicine & Pharmacotherapy 2018 June
Resveratrol (RSV) has been reported to exert anti-inflammatory, anti-oxidant and anti-cancer effects both in vivo and in vitro, and is widely used to treat various diseases. However, the effect of RSV on type 2 diabetes (T2D) is still unclear. The present study aimed to explore the effect of RSV on UA-induced cell injury and dysfunction in pancreatic β-cells. The mouse insulinoma cell line Min6 was treated with 5 mg/dl UA and different concentrations of RSV. Then, cell viability, apoptosis, apoptosis-associated factors, iNOS expression and insulin secretion were examined by CCK-8, flow cytometry, western blot, qRT-PCR and glucose-stimulated insulin secretion (GSIS), respectively. MiR-126 inhibitor and sh-KLF2 were transfected into Min6 cells to alter the expression levels and to reveal the regulatory relationship with RSV. PI3K/AKT signal pathway was analyzed by western blot to uncover the underling mechanism. UA treatment suppressed cell viability, promoted apoptosis, enhanced iNOS expression and decreased insulin secretion in Min6 cells. RSV significantly alleviated UA-induced injury and dysfunction in Min6 cells. The expression level of miR-126 was up-regulated by RSV, and suppression of miR-126 abolished the protective effect of RSV on UA-injured Min6 cells. Additionally, RSV up-regulated KLF2 expression, the promoting effect of RSV on miR-126 expression was reversed by KLF2 silence. Besides, RSV activated PI3K/AKT signal pathway by up-regulation of miR-126 in UA-injured Min6 cells. These data indicated that RSV could protect Min6 cells against UA-induced injury and dysfunction by regulation of miR-126 and activation of PI3K/AKT signal pathway.
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