Mifepristone (RU486) inhibits dietary lipid digestion by antagonizing the role of glucocorticoid receptor on lipase transcription.

Mifepristone (RU486) inhibits dietary lipid digestion by antagonizing the role of glucocorticoid receptor on lipase transcription.
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米非司酮 (RU486) 通过拮抗糖皮质激素受体对脂肪酶转录的作用来抑制膳食脂质消化

DOI:
10.1016/j.isci.2021.102507
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发表时间:
2021-06-25
期刊:
影响因子:
5.8
通讯作者:
Deng H
Deng H
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Ma P;Zhang Y;Liang Q;Yin Y;Wang S;Han R;Huo C;Deng H

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脂质的消化和吸收受到严格调节,以满足组织之间的代谢需求。这些过程如何协调尚不清楚。在这里,我们发现米非司酮 (RU486) 可以防止果蝇和小鼠的脂质消化。在果蝇中,RU486 通过转录下调肠道中的 Magro 来抑制脂质消化。同样,RU486 也通过糖皮质激素受体 (GR) 抑制小鼠肠道脂质摄取。进一步的研究表明,胰腺脂肪酶Pnlip是胰腺组织中GR的直接转录靶标。饲喂高脂肪饮食 (HFD) 的小鼠中的糖皮质激素水平显着低于饲喂传统饮食的小鼠,并且 RU486 给药可抑制 HFD 诱导的小鼠和果蝇肥胖。我们的研究结果确定了 RU486 作为 GR 拮抗剂系统调节脂质代谢的新机制,为糖皮质激素/GR 在库欣病、糖尿病和其他相关代谢综合征中的作用提供了新的见解。 RU486 抑制小鼠和果蝇的脂质消化。在果蝇中,脂肪酶 Magro 通过 dERR 被 RU486 转录抑制。在小鼠中,RU486 通过胰腺中的 (GR)/PTL 途径抑制肠道脂质消化。 RU486 可减轻果蝇和小鼠高脂肪饮食引起的肥胖。脂质;细胞生理学;代谢工程
Lipid digestion and absorption are tightly regulated to cope with metabolic demands among tissues. How these processes are coordinated is not well characterized. Here, we found that mifepristone (RU486) prevents lipid digestion both in flies and mice. In flies, RU486 administration suppresses lipid digestion by transcriptional downregulating Magro in guts. Similarly, intestinal lipid uptake in mice was also suppressed by RU486 through the glucocorticoid receptor (GR). Further studies showed that the pancreatic lipase Pnlip is a direct transcriptional target of GR in pancreas tissues. Glucocorticoid levels in mice fed a high fat diet (HFD) are significantly lower than those fed on a conventional diet, and RU486 administration inhibits HFD-induced obesity both in mice and flies. Our findings identified a novel mechanism of RU486 functions as a GR antagonist systematically regulating lipid metabolism, providing new insight on the role of Glucocorticoid/GR in Cushing disease, diabetes, and other related metabolic syndromes. RU486 suppresses lipid digestion both in mice and flies. In flies, lipase Magro is transcriptionally suppressed by RU486 through dERR. In mice, intestinal lipid digestion is inhibited by RU486 through (GR)/PTL pathway in pancreas. RU486 alleviates high fat diet-induced obesity both in flies and mice. Lipid; Cellular physiology; Metabolic engineering
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发表时间: 2015-04
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