器官特异性脂质谱以营养依赖的方式影响/支持代谢健康
Cassandra Tabasso1, Chaitanya K Gavini1,2, Karin Zemski Berry3,2
1Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Bugnon 7, Lausanne, Vaud, 1005, Switzerland.
bioRxiv : the preprint server for biology
|January 7, 2026
概括
西方饮食消费改变了骨肌肉的脂质配置,特别是在线粒体和脂质滴中,影响了代谢健康. 这些亚细胞变化,包括糖醇和脂变化,是新兴胰岛素耐药性的关键指标.
科学领域:
- 生物化学 生物化学
- 代谢生理学 代谢生理学
- 细胞生物学 细胞生物学
背景情况:
- 西方饮食 (WD) 导致肥胖和胰岛素抵抗 (IR).
- 食脂肪影响全身脂质代谢和胰岛素敏感性.
- 细胞下脂质分布和脂肪酸 (FA) 在骨肌肉中的结合是鲜为人知的.
研究的目的:
- 调查饮食FA摄入如何重塑线粒体和脂质滴滴 (LD) 脂质配置文件.
- 为了确定器官特异性脂质谱是否与代谢健康相关.
- 为了确定与代谢功能障碍相关的特定脂类和FA组成.
主要方法:
- 小鼠被食了WD或对照食12周.
- 评估了全身新陈代谢,胰岛素敏感性和基质使用.
- 进行了线粒体的有机溶解脂组学和从肌底肌肉中的LDs.
- 量化了二甲基甘油 (DAG) 异构体和脂 (PL) 类,并对总溶解物 (TL),线粒体和LDs进行了FA分析.
主要成果:
- 在小鼠中,WD诱导肥胖,脱脂症和IR.
- 内肌细胞脂质增加,而线粒体丰度保持不变.
- 有机细胞溶解的脂管组学揭示了明显的亚细胞脂质特征.
- DAG FA的成分反映了饮食中的FA供应,WD增加了和的FA (SFA).
- PL重塑是分区特定的,线粒体和LD的协调变化被TL掩盖.
- 与LD相关的1,3-DAG,PE和PG与代谢健康有关,并被WD破坏.
结论:
- 饮食中的脂质过载会导致明显的,隔间特定的骨肌脂质组重塑.
- 在DAG和PL类中,在亚细胞区间中显示出不同的FA合并.
- 在LDs和线粒体之间的协调重塑是在整个肌肉水平上被掩盖的.
- LD脂和DAG立体异构体是新兴IR的潜在早期分子标志.
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