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Piceatannol inhibits pyroptosis and suppresses oxLDL-induced lipid storage in macrophages by regulating miR-200a/Nrf2/GSDMD axis.
Bioscience Reports ( IF 4 ) Pub Date : 2020-09-04 , DOI: 10.1042/bsr20201366
Zhongyuan Mu 1, 2, 3 , Hongling Zhang 4 , Peng Lei 1, 2, 3
Affiliation  

As a major bioactive compound from grapes, piceatannol has been reported to exert anti-atherosclerotic activity in various studies. Nevertheless, the mechanism underlying the effect of piceatannol against atherosclerosis is elusive. Our study identified miR-200a/Nrf2/GSDMD signaling pathway as critical mediators in the effect of piceatannol on macrophages. In this study, we confirmed that treatment of piceatannol repressed the oxLDL-induced lipid storage in macrophages. Compared to control group, piceatannol inhibited TG storage and the activity of caspase1. It is noting that in response to oxLDL challenge, piceatannol abated the pyroptosis in RAW264.7 cells, with a decreased expression of caspase1, GSDMD, IL-18, IL-1b and NLRP3. Moreover, we investigated the role of miR-200a/Nrf2 signaling pathway in the effect of piceatannol. The results declared that after transfection of si-miR-200a or si-Nrf2 plasmids, the effects of piceatannol on macrophages were converted, including lipid storage and pyroptosis. Importantly, si-miR-200a plasmid reduced the expression of Nrf2, indicating that miR-200a acted as an enhancer of Nrf2 in macrophages. Collectively, our findings demonstrate that piceatannol exerts anti-atherosclerotic activity on RAW264.7 cells by regulating miR-200a/Nrf2/GSDMD signaling. This study is the first time to identify miR-200a as a candidate target in atherosclerosis and declared an association between miR-200a and pyroptosis, which provides a novel therapy for the treatment of atherosclerosis.

中文翻译:

Piceatannol 通过调节 miR-200a/Nrf2/GSDMD 轴抑制细胞焦亡并抑制巨噬细胞中 oxLDL 诱导的脂质储存。

作为来自葡萄的主要生物活性化合物,有报道称,piceatannol 在各种研究中具有抗动脉粥样硬化活性。然而,piceatannol 对动脉粥样硬化作用的潜在机制是难以捉摸的。我们的研究将 miR-200a/Nrf2/GSDMD 信号通路确定为 piceatannol 对巨噬细胞影响的关键介质。在这项研究中,我们证实了 piceatannol 的治疗抑制了巨噬细胞中 oxLDL 诱导的脂质储存。与对照组相比,piceatannol 抑制 TG 储存和 caspase1 的活性。值得注意的是,作为对 oxLDL 攻击的响应,piceatannol 减轻了 RAW264.7 细胞中的细胞焦亡,同时降低了 caspase1、GSDMD、IL-18、IL-1b 和 NLRP3 的表达。此外,我们研究了 miR-200a/Nrf2 信号通路在 piceatannol 的作用中的作用。结果表明,转染si-miR-200a或si-Nrf2质粒后,piceatannol对巨噬细胞的作用发生了转化,包括脂质储存和细胞焦亡。重要的是,si-miR-200a 质粒降低了 Nrf2 的表达,表明 miR-200a 在巨噬细胞中充当 Nrf2 的增强子。总的来说,我们的研究结果表明,piceatannol 通过调节 miR-200a/Nrf2/GSDMD 信号传导对 RAW264.7 细胞发挥抗动脉粥样硬化活性。本研究首次将miR-200a确定为动脉粥样硬化的候选靶点,并宣布了miR-200a与细胞焦亡之间的关联,为动脉粥样硬化的治疗提供了一种新的治疗方法。重要的是,si-miR-200a 质粒降低了 Nrf2 的表达,表明 miR-200a 在巨噬细胞中充当 Nrf2 的增强子。总的来说,我们的研究结果表明,piceatannol 通过调节 miR-200a/Nrf2/GSDMD 信号传导对 RAW264.7 细胞发挥抗动脉粥样硬化活性。本研究首次将miR-200a确定为动脉粥样硬化的候选靶点,并宣布miR-200a与细胞焦亡之间存在关联,为动脉粥样硬化的治疗提供了一种新的治疗方法。重要的是,si-miR-200a 质粒降低了 Nrf2 的表达,表明 miR-200a 在巨噬细胞中充当 Nrf2 的增强子。总的来说,我们的研究结果表明,piceatannol 通过调节 miR-200a/Nrf2/GSDMD 信号传导对 RAW264.7 细胞发挥抗动脉粥样硬化活性。本研究首次将miR-200a确定为动脉粥样硬化的候选靶点,并宣布了miR-200a与细胞焦亡之间的关联,为动脉粥样硬化的治疗提供了一种新的治疗方法。
更新日期:2020-09-07
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