视网膜微血管细胞释放的促炎/血管因子是由来自M1-激活的微质细胞的细胞外囊所介导的
Elena Beltramo1, Aurora Mazzeo1, Massimo Porta1
1Department of Medical Sciences, University of Turin, 10126 Torino, Italy.
International journal of molecular sciences
|January 11, 2024
概括
炎症性微质细胞释放出细胞外囊泡 (EVs),在糖尿病视网膜病变 (DR) 中损害视网膜微血管结构. 胺治疗减少了这些有害的EV效应,这表明了DR的潜在治疗策略.
科学领域:
- 眼科医生 眼科 眼科
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 糖尿病视网膜病变 (DR) 涉及视网膜神经元和血管系统之间的复杂相互作用.
- 微质在视网膜炎症中起着关键作用,可能释放细胞外囊泡 (EVs),调解损伤.
研究的目的:
- 为了鉴别发炎的人类微质细胞的EVs.
- 研究这些EV对视网膜微血管细胞的影响.
- 在这种情况下,评估胺的抗炎潜力.
主要方法:
- 人类微质细胞被偏向到M1的亲炎症状态.
- 细胞外囊泡 (EVs) 被分离和表征.
- 视网膜内皮细胞 (HREC) 和皮质细胞 (HRPs) 用M1衍生的EVs进行刺激.
- 评估了细胞功能和炎症因子释放.
- 胺被添加到M1-微质培养物中.
主要成果:
- 由M1衍生出的EV含有增加的miR-21,miR-155,CCL2,MMP2和MMP9.9的含量.
- 这些EV诱导了HRPs和HREC中的亡,增殖,迁移和ROS生产.
- 在微血管细胞中,EV暴露增加了促炎和血管性因素 (IL-1β,IL-6,MMP9,CCL2,VEGF,Ang2,PDGF-B).
- 胺治疗在很大程度上扭转了这些有害影响.
结论:
- 在炎症状态下,微质衍生的EVs促进微血管功能障碍并加剧DR特征.
- 胺通过调节微质EV释放及其对视网膜血管结构的影响来表现出抗炎作用.
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