肠内分泌细胞中的遗传幕揭示了控制蛋白质感应和GLP-1释放的机制
bioRxiv : the preprint server for biology
|January 16, 2026
概括
肠内分泌细胞 (EECs) 感知饮食中的蛋白质不是通过已知的传感器,而是通过线粒体呼吸. 促进这一过程可以增强营养感应和GLP-1释放,这表明新的治疗点.
科学领域:
- 胃肠道学和新陈代谢学
- 细胞生物学 细胞生物学
- 分子内分泌学分子内分泌学
背景情况:
- 肠内分泌细胞 (EEC) 是重要的胃肠营养传感器.
- 它们释放像葡萄糖类1 (GLP-1) 这样的激素来调节食欲和肠道功能.
- 缺乏系统研究,绘制与EEC营养感应有关的基因和途径的地图.
研究的目的:
- 开发一种高通量选策略,用于识别营养诱导的EEC激活所需的基因.
- 研究欧洲经济共同体 (EECs) 中饮食蛋白质感应背后的机制.
- 探索细胞内代谢在EEC功能中的作用.
主要方法:
- 使用超过20,000个sgRNAs的高通量屏幕被用来识别EEC细胞系中营养感应必需的基因.
- 进行了二次测试,以验证已识别的基因的作用,重点关注线粒体呼吸和氧化酸化 (OXPHOS).
- 在不同的OXPHOS条件下,对营养和非营养刺激的反应中测量了EEC激活和GLP-1释放.
主要成果:
- 之前提出的蛋白质传感器基因被发现是可以在EEC中进行蛋白质传感的.
- 与线粒体呼吸相关的基因,特别是氧化酸化 (OXPHOS),被确定为营养感应的关键.
- 损害OXPHOS降低了营养诱导的EEC激活和GLP-1释放,同时增强OXPHOS增加了这些反应.
结论:
- 细胞内代谢,特别是线粒体氧化酸化,在EEC检测食蛋白质中起着关键作用.
- 欧共体营养传感可能包括监测氨基酸进入TCA循环.
- 这项研究为发现促进肠道释放的基因和途径提供了一个框架,例如GLP-1,以获得治疗益处.
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