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木犀草素通过涉及 Nrf2 途径和调节 miR320 发挥对缺血再灌注损伤的肾保护作用。

Luteolin confers renoprotection against ischemia-reperfusion injury via involving Nrf2 pathway and regulating miR320.

机构信息

Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.

Cellular and Molecular Research Center, Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.

出版信息

Mol Biol Rep. 2019 Aug;46(4):4039-4047. doi: 10.1007/s11033-019-04853-0. Epub 2019 May 14.

Abstract

This work aims to evaluate the renoprotective effect of luteolin on expression of Nrf2 and miR320 in ischemia-reperfusion (I/R) injury in rats. Thirty rats were randomly divided into five groups; control, Luteolin (50 mg/kg), ischemia-reperfusion (I/R), DMSO (0/1%) + I/R and Luteolin+I/R, (n = 6 each). Administration of luteolin and DMSO was carried out by gavage for 3 days before renal I/R. Then, the rats were subjected to bilateral renal ischemia for 45 min and followed by reperfusion for 2 h. All rats were killed and the renal function, histological changes, oxidative stress degree, in all of groups were evaluated. In addition, the effects of luteolin on renal expression of Nrf2 and miR320 were examined by immunohistochemistry and real time- PCR. Luteolin significantly improved the creatinine (Cr) and blood urea nitrogen (BUN) levels in Luteolin + I/R group compared to I/R group (p < 0.001 and p < 0.001 respectively). Reduction of enzymatic activity of superoxide dismutase, glutathione peroxidase and catalase in I/R and DMSO + I/R groups, was significantly improved by Luteolin (p < 0.05) in Luteolin + I/R group. Pre-treatment with luteolin also resulted in significant reduction in tissue MDA level (p < 0.001), Nrf2 (p < 0.001) and miR320 expression (P < 0.05) that were increased by renal I/R. Also, the rats pretreated with luteolin had nearly normal structure of the kidney. These results indicate that luteolin protects the kidney against I/R injury via reducing oxidative stress, increasing antioxidant enzymes and reducing expression of Nrf2 and miR320.

摘要

本研究旨在评估木樨草素对大鼠缺血再灌注(I/R)损伤中 Nrf2 和 miR320 表达的肾保护作用。30 只大鼠随机分为 5 组:对照组、木樨草素(50mg/kg)组、I/R 组、DMSO(0/1%)+I/R 组和木樨草素+I/R 组(每组 6 只)。在肾 I/R 前 3 天通过灌胃给予木樨草素和 DMSO 进行给药。然后,大鼠双侧肾脏缺血 45min,再灌注 2h。所有大鼠均处死,评估各组肾功能、组织学变化、氧化应激程度。此外,通过免疫组织化学和实时 PCR 检测木樨草素对肾 Nrf2 和 miR320 表达的影响。与 I/R 组相比,木樨草素+I/R 组肌酐(Cr)和血尿素氮(BUN)水平显著改善(p<0.001 和 p<0.001)。与 I/R 组和 DMSO+I/R 组相比,木樨草素+I/R 组超氧化物歧化酶、谷胱甘肽过氧化物酶和过氧化氢酶的酶活性降低得到显著改善(p<0.05)。木樨草素预处理还导致组织 MDA 水平(p<0.001)、Nrf2(p<0.001)和 miR320 表达(P<0.05)降低,而这些变化均是由肾 I/R 引起的。此外,用木樨草素预处理的大鼠肾脏结构几乎正常。这些结果表明,木樨草素通过降低氧化应激、增加抗氧化酶和减少 Nrf2 和 miR320 的表达来保护肾脏免受 I/R 损伤。

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