来自皮肤肌纤维细胞的微囊,通过不同的内分细胞形成途径,改变了血液和淋巴屏障的完整性
Syrine Arif1, Megan Richer1, Sébastien Larochelle1
1Centre de recherche en organogénèse expérimentale de l'Université Laval/LOEX Centre de recherche du CHU de Québec-Université Laval Quebec Canada.
Journal of extracellular biology
|June 28, 2024
概括
伤口肌纤维细胞微囊 (MVs) 不同地影响内皮壁垒. MVs穿过淋巴内皮细胞,关闭结节,但不是血液内皮细胞,打开它们,影响伤口愈合.
科学领域:
- 细胞生物学 细胞生物学
- 细胞外囊泡 细胞外囊泡
- 内皮细胞生物学 内皮细胞生物学
背景情况:
- 微 (MVs) 通过转移生物分子来调解细胞间的通信.
- 皮肤伤口肌纤维细胞 (Wmyo) 产生影响人类皮肤微血管内皮细胞 (HDMEC) 的MV.
- 对于Wmyo-MVs对HDMEC亚群的传输和屏障效应仍然不清楚.
研究的目的:
- 研究Wmyo-MV在血液内皮细胞 (BEC) 和淋巴内皮细胞 (LEC) 上的传输和影响.
- 确定MV诱导的内皮屏障完整性和细胞-细胞结合的变化.
- 阐明参与MV-内皮相互作用的机制和途径.
主要方法:
- 使用了体外内皮质屏障模型与BEC和LEC.
- 在内皮单层中跟踪Wmyo-MV转位.
- 使用显微镜和功能分析分析了MV对内皮细胞-细胞结合和屏障透性的影响.
- 研究的MV内化途径 (卡韦林依赖,巨细胞).
主要成果:
- Wmyo-MVs通过了LEC屏障,但没有越过BEC屏障.
- MVs通过卡韦林依赖的路径诱导了 BEC 中的结口开放.
- 在LEC中,MVs通过巨型皮诺细胞化诱导了结合关闭.
- MV膜蛋白,而不是VEGF家族成员,调解了这些结点效应.
- 屏障透性的变化影响了随后的MV转位.
结论:
- 来自Wmyo的MVs与BEC和LEC障碍物产生明显的相互作用,影响其完整性.
- 这些差异效应表明,MVs在伤口愈合期间调节内皮屏障功能的过程中起着作用.
- 了解MV-内皮相互作用,可以了解伤口修复中的病理和生理过程.
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