Sfxn5 调控中性粒细胞扩散的阿克聚合 取决于一个酸盐-胆固醇-PI 路径......4,5) P2
Huan Zhang1, Ling Meng1, Yang Liu1
1Laboratory of Developmental Biology, Department of Cell Biology and Genetics, School of Basic Medical Sciences, Chongqing Medical University, Chongqing, China.
Journal of immunology (Baltimore, Md. : 1950)
|June 16, 2023
概括
赛德罗弗莱克辛-5 (Sfxn5) 缺乏症通过降低细胞酸和胆固醇来损害中性粒细胞的扩散和迁移,而这些化合物对actin聚合和炎症反应至关重要. 这项研究显示Sfxn5
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 中性粒细胞的扩散对于炎症组织的招募至关重要.
- 赛德罗素 (Sfxn) 蛋白质是线粒体的代谢物转运体.
- Sfxn5的细胞功能在很大程度上是未知的.
研究的目的:
- 研究Sfxn5在中性粒细胞功能和炎症招募中的作用.
- 阐明Sfxn5影响中性粒细胞行为的分子机制.
主要方法:
- 利用小干扰RNA和morpholino注射,在小鼠和斑马鱼中产生Sfxn5缺乏的中性粒细胞.
- 评估中性粒细胞的招募,扩散,粘附,化学反应和ROS的产生.
- 分析了细胞内代谢物水平 (酸盐,乙CoA,胆固醇) 和血PI (4,5) P2.2.
- 研究了外源酸盐和胆固醇补充剂的影响.
主要成果:
- 缺少Sfxn5显著降低了中性粒细胞的招募,扩散和相关的细胞功能.
- 在Sfxn5缺乏的中性粒细胞中,乙烯酸聚合受损.
- 细胞酸盐酸盐,乙-CoA和胆固醇水平下降,同时降低了血膜PI(4,5) P2.2.
- 酸盐或胆固醇补充剂部分恢复了PI (4,5) P2水平,活性蛋白聚合和细胞扩散.
结论:
- Sfxn5对于维持细胞酸盐水平至关重要,支持胆固醇合成.
- 这一过程对于中性粒细胞扩散过程中的PI{4,5) P2依赖性活性蛋白聚合至关重要.
- Sfxn5在中性粒细胞迁移和炎症反应中起着关键作用.
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