来自人类调节性巨细胞 (L-EVMreg) 的大型细胞外囊在体外减弱CD3/CD28诱导的T细胞激活
Martin Albrecht1, Lars Hummitzsch2, Rene Rusch3
1Department of Anesthesiology and Intensive Care Medicine, University Hospital of Schleswig-Holstein, Kiel, Germany. martin.albrecht@uksh.de.
概括
由调节性巨细胞 (Mreg) 释放的大型细胞外囊 (L-EVs) 可以抑制T细胞激活. 这些L-EVs表现出脂素阳性,可能在治疗T细胞相关疾病方面具有临床意义.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 细胞外囊泡 细胞外囊泡
背景情况:
- 调节性巨细胞 (Mreg) 是天生的免疫系统的关键组成部分.
- 释放出大型细胞外囊泡 (L-EVs),调节生物过程.
- 之前的研究表明L-EVs调节伤口愈合和血管生成.
研究的目的:
- 研究来自Mreg的L-EVs对T细胞激活的影响.
- 为了确定L-EV是否可以调节CD3/CD28介导的T细胞反应.
- 探索L-EVs在T细胞介导疾病中的潜在临床相关性.
主要方法:
- 从血液单细胞中区分出人类的Mreg.
- 通过微分离离心,从Mreg培养超体中分离的L-EVs.
- 使用CD3/CD28珠子激活的人类T细胞,有或没有Mreg或L-EVs.
- 量化T细胞激活通过流细胞计测量大酶B的量化T细胞激活.
- 使用光显微镜分析了Mreg和L-EVs对酸素素 (PS) 的暴露.
主要成果:
- 通过增加细胞大小,颗粒度和B粒酶表达,证实了T细胞激活.
- Mreg显著降低了T细胞激活.
- L-EVs表现出对CD4+和CD8+T细胞激活的剂量依赖抑制.
- 在L-EV的表面检测到脂氨酸.
结论:
- 由Mreg释放的L-EV可以减弱CD3/CD28介导的T细胞激活.
- L-EVs表现出免疫抑制性质,特别是针对CD4+T细胞.
- L-EVs可能具有重要的临床潜力,用于治疗特征为过度T细胞活动的疾病.
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