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等离子素通过从细胞表面割断结合的CCL21来减少人体T细胞在内皮样细胞上的被捕

James Jack Willis Hucklesby¹, Catherine Elizabeth Angel², Euan Scott Graham³

¹School of Biological Sciences, Faculty of Science, University of Auckland, Auckland, New Zealand; Department of Molecular Medicine and Pathology, The University of Auckland, New Zealand.

Experimental cell research

|February 26, 2025

概括

等离子体在内皮细胞上切割细胞表面CCL21 (化学因子C-C动图联体21),降低在剪切应力下T细胞的粘附. 这个过程可能由内皮细胞调节.

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:

CCL21 (化学因子C-C动态联结体21) 对于淋巴细胞归向和跨内皮细胞迁移至关重要.
CCL21与内皮细胞表面结合,调解淋巴细胞的停止,但其从这些细胞释放的机制尚不清楚.
已知等离子素可以从免疫细胞中切割CCL21,但不能从内皮细胞中切割.

研究的目的:

为了研究CCL21从内皮细胞表面分裂的机制.
确定等离子素在释放细胞表面CCL21.21中的作用.
评估由等离子体介导的CCL21释放对T细胞粘附的影响.

主要方法:

使用了人类内皮状细胞系 (ECV304/LS12和HMEC-1).
研究了细胞表面结合和激活等离子体.
在剪切应力条件下评估CCL21释放和T细胞粘附.

主要成果:

ECV304 (LS12) 和HMEC-1细胞与等离子体结合.
ECV304 (LS12) 细胞内源地激活等离子素释放CCL21;HMEC-1细胞需要外源的tPA进行这种激活.
在剪切应力下,等离子素显著降低了T细胞对表达表面CCL21的内皮细胞的粘附.

结论:

等离子体切割内皮细胞表面CCL21,在剪切应力下降T细胞粘附.
内皮细胞差异地表达等离子素激活剂,可能调节等离子素的可用性和T细胞的停止.
这项研究阐明了一种控制内皮屏障T细胞迁移的新机制.

关键词:

CCL2121 CCL21 CCL21 CCL21 CCL21 CCL21 CCL21 CCL21 CCL21 化学物质化学物质是化学物质.内皮细胞是内皮细胞.塑胺是什么意思塑原生是因为塑.一个T细胞细胞.组织等离子素激活剂 tPAPA tPAPA 是一个很好的方法.

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