糖醇代谢驱动宿主-病原体反应在Drosophila的肠道感染期间
Xiaotong Li1,2, Mohamed Mlih2, Jason Karpac1,2
1Department of Biology, Texas A&M University, College Station, TX, 77843, USA.
bioRxiv : the preprint server for biology
|September 15, 2025
概括
主体对感染的免疫反应涉及脂质代谢. 这项研究表明,肠道中的1,2-二甲糖醇 (DAG) 通过调节排便来促进病原体清除,从而提高宿主生存率.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 代谢调节 代谢调节 代谢调节
背景情况:
- 脂质代谢对细胞功能至关重要,包括能量储存和膜结构.
- 脂质越来越多地被认为是它们在调节宿主免疫力和宿主-病原体相互作用方面的重要作用.
研究的目的:
- 阐明一种新的脂质驱动机制,控制宿主防御对肠道感染.
- 研究中性脂质,特别是1,2-二甲基甘油 (DAG) 在调节病原体清除和宿主存活中的作用.
主要方法:
- 利用Drosophila melanogaster作为一个模型生物来研究肠道感染.
- 研究了破坏DAG生物合成和脂质运输在中肠肠道细胞 (ECs) 的影响.
- 评估了食脂质补充对宿主生存和脂质储存的影响.
主要成果:
- 肠道感染诱导了Drosophila中肠中的1,2-二甲基甘油 (DAG) 显著积累.
- 在中肠肠肠细胞中DAG代谢或运输的干扰,损害了脂质积累和减少宿主存活率.
- 食脂质补充剂增强了脂质储存,改善了宿主生存率.
- DAG积累与中肠内脏肌 (VM) 中蛋白激酶C (PKC) 活性增加和信号传递相关,促进肌肉收缩和通过排便驱逐病原体.
结论:
- 1,2-二甲基糖醇 (DAG) 在宿主防御机制中对肠道病原体起着至关重要的作用.
- 脂质代谢,特别是DAG信号传递,调节了中肠运动和通过排便清除病原体.
- 这些发现揭示了DAG代谢在先天免疫和感染结果中以前未知的功能.
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