骨髓中介细胞干细胞衍生的外体促进M2极化,并防止急性肺损伤
Yongmei Cao1, Weifeng Huang2, Jiawei Shang2
1Department of Critical Care Medicine, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.
概括
骨髓介质干细胞衍生的外体细胞 (BMSCs-Exos) 通过通过miR-137-3p传递促进M2巨细胞极化来改善急性肺损伤. 这种机制抑制M1极化,减少炎症,缓解肺损伤.
科学领域:
- 再生医学是一种再生医学.
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 急性肺损伤 (ALI) 是一种严重的疾病,治疗选择有限.
- 膜巨细胞极化在ALI的发病过程中起着关键作用.
- 介质干细胞衍生的外体细胞 (BMSCs-Exos) 显示出对ALI的治疗潜力.
研究的目的:
- 研究BMSCs-Exos在ALI中调节膜巨细胞极化的分子机制.
- 确定miR-137-3p在BMSCs-Exos对ALI治疗效果中的作用.
主要方法:
- BMSCs-Exos被隔离并进行了表征.
- 试验室研究涉及用BMSCs-Exos治疗小鼠膜巨细胞 (MH-S),然后进行脂多糖 (LPS) 和干扰素- (IFN-γ) 刺激.
- 在体内研究中使用了用BMSCs-Exos治疗的LPS诱导的ALI小鼠模型.
- 分子分析包括露西法酶记者测定,西部斑点,RT-qPCR,以及对炎症性细胞因子和活性氧物种 (ROS) 的评估.
主要成果:
- BMSCs-Exos治疗将巨细胞的两极分化从M1转移到M2表型,减少促炎细胞因子 (TNF-α,IL-1β) 和增加抗炎细胞因子 (IL-10).
- BMSCs-Exos上调了miR-137-3p,它向并抑制了TRIM24表达,促进了M2极化标记物 (Arg1,Fizz1) 并减少了M1标记物 (Nos2) 和ROS产生.
- 在体内,BMSCs-Exos给药减轻了ALI小鼠的肺组织病理学,改善了肺功能,并减少了肺损伤.
结论:
- BMSCs-Exos通过将miR-137-3p输送到膜巨细胞,对ALI产生治疗作用.
- 这种传递促进M2极化,并抑制M1极化,从而减轻肺炎和损伤.
- BMSCs-Exos代表了急性肺损伤的有前途的无细胞治疗策略.
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