体驱动的脂质重塑支持热能适应禁食
bioRxiv : the preprint server for biology
|July 16, 2025
概括
禁食激活棕色脂肪,燃烧体以产生热量和脂肪合成. 这种代谢适应有助于生存和改善脂质概况,为饮食干预提供了目标.
科学领域:
- 代谢适应 代谢适应
- 棕色脂肪组织 (BAT) 的生物学
- 营养生物化学 营养生物化学
背景情况:
- 禁食诱导的代谢变化可能会赋予生存优势,并影响现代体重增加.
- 棕色脂肪组织 (BAT) 热生成在禁食期间被抑制,但其代谢重新连接仍然不清楚.
- 了解BAT对禁食的反应对于代谢健康和弹性至关重要.
研究的目的:
- 为了研究棕色脂肪组织 (BAT) 在禁食和暴露在寒冷中如何利用体.
- 确定在BAT中使用乙乙酸盐 (AcAc) 的代谢命运和功能后果.
- 探索BAT的代谢与间歇性禁食对脂质特征的益处之间的联系.
主要方法:
- 在禁食和寒冷挑战条件下利用了小鼠模型.
- 在棕色脂肪细胞中使用稳定同位素追踪和定量代谢流量分析.
- 从基因小鼠模型中对BAT进行了脂组学,基因小鼠模型的基因基因基因基因发生变化.
- 研究了消除或增强肝生成对温度调节的影响.
主要成果:
- 棕色脂肪组织 (BAT) 在禁食和感冒期间消耗了体,特别是乙乙酸盐 (AcAc).
- 消灭肝脏生成损害了体温防御,而增强AcAc输出则改善了它.
- 在BAT中,AcAc被用于线粒体氧化和细胞质脂类生物合成.
- 在BAT中,AcAc衍生碳优先支持多不和脂肪酸合成.
结论:
- 热性脂肪细胞对体的利用是禁食和寒冷压力期间的关键代谢适应.
- 这一过程有助于代谢弹性,并改善脂质概况,如在小鼠和人类中观察到的.
- 在BAT中准体代谢可能会优化间歇性禁食等饮食方案的好处.
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