包装释放和针对性传递的细胞因子由循环中的migrasomes在循环中的
Haifeng Jiao1, Xiaopeng Li1, Ying Li1
1State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Centre for Life Sciences, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing, China.
Cell discovery
|December 8, 2024
概括
单细胞在刺激后释放含有TNF-α和IL-6等炎症性细胞因子的迁移体. 这些细胞因子丰富的迁移体作为细胞外囊泡,在炎症部位集中炎症信号.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 细胞外囊泡 细胞外囊泡
背景情况:
- 在动态系统 (如循环系统) 中建立局部化的细胞因子梯度是一个重大挑战.
- 细胞因子在调节免疫反应中起着至关重要的作用,但它们的受控释放和传递仍然是积极研究的领域.
研究的目的:
- 调查单细胞衍生型迁移体在细胞因子运输和释放中的作用.
- 阐明免疫反应期间发炎性细胞因子递送的新机制.
主要方法:
- 用脂聚糖 (LPS) 刺激单细胞.
- 从生物流体中分离和表征迁移体.
- 在密格拉索姆体内的细胞因子含量 (TNF-α,IL-6) 的量化.
- 通过迁移体包装和外细胞分裂释放细胞因子的分析.
主要成果:
- 单细胞释放出显著富含炎症性细胞因子的迁移体,包括瘤亡因子-α (TNF-α) 和互白素-6 (IL-6).
- 细胞因子通过分泌载体被运输到迁移体中,可以通过直接的外细胞分裂或迁移体脱离释放出来.
- 在接受LPS治疗的小鼠的血液样本中,检测到大量的TNF-α和IL-6在密格拉索姆包装的形式中.
- 单细胞衍生的迁移体作为细胞外囊泡起作用,专门用于缩和输送细胞因子.
结论:
- 独立的,单细胞衍生的迁移体作为强大的细胞因子载体,代表局部炎症信号放大的一种新机制.
- 这些带有细胞因子的迁移体在炎症部位迅速积累,形成缩的细胞因子来源,并为免疫反应调节提供了新的见解.
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