甘-3-酸盐激活了CHREBP,FGF21转录和代在素缺乏症中
Vinod Tiwari1, Byungchang Jin2, Olivia Sun1
1Beckman Research Institute of City of Hope; Duarte, USA.
bioRxiv : the preprint server for biology
|January 7, 2025
概括
素缺乏 (SLC25A13损失) 导致甘-3-酸盐的积累,激活ChREBP. 这导致FGF21的产生,抑制甜食/酒精摄入量,促进脂质生成,导致肝病.
科学领域:
- 生物化学 生物化学
- 代谢性疾病是一种代谢性疾病.
- 遗传学 是一个遗传学.
背景情况:
- 素缺乏症 (CD) 由SLC25A13的失活引起,从而损害了肝细胞中的线粒体电子运输.
- 患有CD的患者表现出对糖果的厌恶,这表明SLC25A13功能与饮食偏好之间存在联系.
研究的目的:
- 阐明SLC25A13损失影响新陈代谢途径和食物选择的机制.
- 研究甘-3-酸盐 (G3P) 和ChREBP在CD和相关代谢障碍的病理生理学中的作用.
主要方法:
- 利用小鼠和人类的数据来分析SLC25A13缺陷下游的分子机制.
- 研究了通过G3P积累激活碳水化合物反应元素结合蛋白 (ChREBP).
- 研究了FGF21在调解行为和代谢变化的作用.
主要成果:
- 失去了SLC25A13会导致糖醇-3-酸盐 (G3P) 在肝细胞中的积累.
- G3P激活了ChREBP,促进了FGF21的转录和参与de novo脂质生成的基因.
- FGF21以中心作用减少糖果和酒精的摄入量,并有助于代谢功能障碍相关的脂肪性肝病 (MASLD).
结论:
- 确定了G3P-ChREBP作为兰德尔循环的新组成部分,将肝脏新陈代谢与大脑介导的食物选择联系起来.
- 建立了一个新的系统,向大脑传达肝脏代谢状态,影响对糖果和酒精的食欲.
- 为了解FGF21调节和潜在的治疗策略提供了一个框架,用于在CD中支持精瘦MASLD和尿素循环.
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