膀性泌尿酶受体 uPAR 对血管细胞迁移和增殖的差异性影响
Polina Klimovich1,2, Artem Maier3, Valentina Dzreyan3
1Institute of Experimental Cardiology, National Medical Research Center of Cardiology Named After Academician E.I. Chazov, 121552, Moscow, Russia. lex2050@mail.ru.
Molecular and cellular biochemistry
|October 29, 2025
概括
带有尿素酶血激活受体 (uPAR) 的介质细胞干/细胞 (MSC) 衍生的细胞外囊对于血管生成至关重要. 缺乏UPAR会损害内皮细胞迁移和血管形成,突出显示UPAR的存在.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生化学
- 再生医学是一种再生医学.
背景情况:
- 血管新生,新血管的形成,对于组织再生和修复至关重要.
- 介质细胞干/干细胞 (MSC) 和它们分泌的细胞外囊泡 (EV) 越来越多地被认为是促进再生过程的角色.
- 泌尿酸酶等离子激素激活器系统 (uPAS),包括泌尿酸酶等离子激活器 (uPA) 和其受体 (uPAR),在细胞信号和组织重塑中起着复杂的作用.
研究的目的:
- 通过将其纳入MSC衍生的细胞外囊 (EVs) 来研究尿素酶等离子素激活剂受体 (uPAR) 参与血管生成的新奇机制.
- 在MSC-EV中阐明UPAR和uPA在调节内皮细胞 (EC) 和光滑肌细胞 (SMC) 行为的特定作用.
- 了解MSC中PAR的缺失如何影响EV的组成及其血管生成潜力.
主要方法:
- 使用超过,流细胞测量,西部涂抹 (WB) 和纳米粒子跟踪分析,对MSC衍生的EVs进行隔离和表征.
- 使用Matrigel中的大动脉环模型评估血管生成,以评估毛细血管样结构的形成和血管细胞迁移.
- 使用显微镜,WB和ELISA分析细胞迁移,增殖,信号通路 (Akt) 和蛋白质含量 (uPA, uPAR).
主要成果:
- uPA和uPAR被纳入MSC分泌的EV中,并调节EC和SMC的扩散和迁移.
- 来自缺乏UPAR的MSC的EV促进了SMC迁移,但未能支持EC迁移和毛细管状结构的形成.
- 在MSC中缺少UPAR导致uPA表达失调,并增加了EV中的uPA含量,EC与uPA对SMC的影响相比,对UPAR缺少的敏感性更高.
结论:
- 携带UPAR的MSC衍生的EV是血管生成的重要调节剂,影响EC和SMC功能.
- 电动汽车中的UPAR在促进EC迁移和毛细血管形成方面发挥着关键作用,而uPA主要推动SMC迁移.
- 这些发现揭示了PAR,uPA和EV在血管生成中的微妙相互作用,为再生医学提供了新的治疗点.
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