证据表明巨细胞中的线粒体被微自细胞破坏
Shiou-Ling Lu1, Siyu Chen1, Kazuya Noda1,2
1Department of Oral Cellular Biology, Center for Frontier Oral Science, Graduate School of Dentistry, The University of Osaka, Osaka, Japan.
Nature communications
|August 30, 2025
概括
微自直接通过Rab32阳性细胞在巨中的线粒体等细胞器分解. 这一过程对于巨细胞M1极化和代谢重编程至关重要.
科学领域:
- 细胞生物学
- 免疫学
- 分子生物学
背景情况:
- 微自是一种细胞降解途径,其中溶酶体吞基质.
- 溶酶体相关器官 (LROs) 在细胞过程中发挥着不同的作用.
- 巨分化对免疫反应和代谢平衡至关重要.
研究的目的:
- 研究Rab32阳性LROs在巨细胞内细胞降解中的作用.
- 阐明 LRO 吞器官的机制,独立于其他降解途径.
- 确定这种降解过程对巨细胞两极分化和功能的影响.
主要方法:
- 使用巨细胞培养模型.
- 通过显微镜和生物化学测试来研究器官吞.
- 检查了Rab32,酸氨酸3,5-双酸盐,无处不在和p62/SQSTM1的作用.
- 评估野生型和Rab32/38双敲击型巨细胞的M1极化和代谢变化.
主要成果:
- 拉布32阳性LRO通过膜侵入/突出直接吞细胞器,包括线粒体和内体.
- 线粒体的降解独立于宏自和ESCRT机制.
- Rab32 GTPase,PI(3,5) P2,无处不在和p62/SQSTM1对于这种微自途径至关重要.
- 通过这种途径消除线粒体促进了对糖分的代谢重编程.
- 在Rab32/38双击细胞中,巨细胞的M1极化显著受损.
结论:
- 由Rab32阳性LROs介导的微自是一种新的细胞器降解机制.
- 这一途径对于调节巨代谢和M1极化至关重要.
- 这些发现揭示了微自在免疫细胞生理中的新作用.
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