表达ASC的pyroptotic细胞外囊泡通过保护B细胞来缓解败血症
Weiying Huang1, Ben Wang1, Qianmin Ou1
1Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, South China Center of Craniofacial Stem Cell Research, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, China.
Molecular therapy : the journal of the American Society of Gene Therapy
|December 14, 2023
概括
鉴定和特征化了热性细胞外囊泡 (pyroEVs). 这些pyroEVs保护B细胞并通过抑制Toll-like受体4来改善败血症的生存率.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 生物化学 生物化学
背景情况:
- 热症是一种炎症性细胞死亡,释放纳米尺寸囊泡.
- 已知apoptotic囊泡 (apoVs) 的功能已知,但 pyroptotic EVs (pyroEVs) 仍然没有特征.
- 了解pyroEV对于它们的治疗潜力至关重要.
研究的目的:
- 为了识别和描述pyroEVs.
- 为了研究pyroEVs在败血症中的治疗潜力.
- 为了阐明B细胞介导免疫中pyroEVs的机制.
主要方法:
- 从MSC和败血性小鼠血液中分离和描述pyroEVs.
- 将pyroEVs与apoVs和exosomes进行比较,使用ASC和分裂caspase-3等标记物.
- 在体内研究评估pyroEVs对B细胞的影响,炎症和败血症小鼠的生存.
主要成果:
- 通过表达ASC而识别和区分PyroEVs和apoVs,但没有分裂caspase-3.
- 由MSC衍生的pyroEVs保护了脏和骨髓中的B细胞,减少了炎症.
- 在败血症小鼠中,PyroEVs通过与B细胞结合并抑制Toll类受体提高了生存率.
结论:
- PyroEV 是一个独特的细胞外囊泡类别,具有独特的特征.
- 通过调节B细胞反应,PyroEVs在败血症中显示出治疗潜力.
- 在pyroEV上的ASC蛋白调解它们对炎症细胞死亡的保护作用.
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