中性粒细胞表现出明显的迁移表型,这些表型由超内皮细胞迁移调节
bioRxiv : the preprint server for biology
|December 16, 2024
概括
超内皮迁移 (TEM) 将多态核中性粒细胞 (PMN) 从高持久性迁移转移到低持久性迁移. GRK2信号传递调解了这种TEM诱导的表型变化,这对免疫细胞功能和炎症解决至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 多态核中性粒细胞 (PMN) 的扩散对先天免疫至关重要,涉及跨内皮移动 (TEM) 和间位移动.
- 尽管TEM引发了复杂的信号级联,但TEM对随后的PMN间歇性迁移的影响仍然不清楚.
研究的目的:
- 研究TEM对PMN间位迁移表型的生物物理影响.
- 阐明GRK2信号在调解PMN迁移中TEM诱导的变化的作用.
主要方法:
- 人体血管内皮细胞 (VECs) 培养在跨井插入器上,模拟内皮.
- 类似于PMN的分化HL60 (dHL-60) 细胞接受了TEM,并通过原基质量表量化了它们随后的3D迁移.
- 用GRK2抑制来评估其在表型调节和细胞功能中的作用.
主要成果:
- 超过5万个细胞轨迹揭示了两个不同的PMN迁移表型:高持久性 (直线,快速) 和低持久性 (不稳定,缓慢).
- 在PMN中,TEM引发了从高持久性迁移到低持久性迁移的显著转变.
- 抑制GRK2损害了这种TEM诱导的表型变化,并降低了PMN的细胞能力.
结论:
- TEM对PMN进行原始化,通过GRK2信号改变其迁移表型,以提高空间探索和炎症分辨率.
- 这些发现为免疫反应期间PMN功能的生物物理调节提供了新的见解.
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