来自hucMSCs的外基因组以IFN-γ为原料,通过调节miR-199b-5p/AFTPH轴来抑制LPS诱导的ALI中的NF-κB信号通路
Chun Wang1,2, Yiran Yang1, Chen Jiang1
1Kunming Medical University, Kunming, Yunnan, China.
Cell biochemistry and biophysics
|January 12, 2024
概括
来自介质干细胞的干细胞的干细胞向miR-199b-5p/AFTPH轴以抑制NF-κB信号传递,为急性肺损伤 (ALI) 提供一种新的无细胞疗法. 这种机制为治疗ALI提供了新的方向.
科学领域:
- 再生医学是一种再生医学.
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 介质干细胞 (MSC) 衍生的外体对治疗急性肺损伤 (ALI) 至关重要.
- 在ALI中MSC外生体作用的精确机制,特别是在改变的微环境中,需要进一步阐明.
- 开发ALI的无细胞治疗策略是一个重要的临床目标.
研究的目的:
- 在ALI治疗中研究由干子- (IFN-γ) 培养的人类带MSCs (hucMSCs) 衍生的外体的机制.
- 为ALI提出一种新的,无细胞的治疗策略,利用原始化外体.
- 为了确定参与外体介导ALI治疗的分子途径.
主要方法:
- 从hucMSC上游体中分离出外体,用IFN-γ.exos进行原始化 (IFN-γ-exos) 和未原始化 (CON-exos).
- 评估NF-κB信号通路的活性是使用西部斑点和免疫组织化学染色.
- 通过RT-qPCR量化了miR-199b-5p的表达;通过双露西法酶记者测定和细胞转染研究了它与AFTPH的相互作用.
- 蛋白质相互作用通过共免疫沉和西方布洛特分析.
主要成果:
- 与CON-exos相比,IFN-γ-exos在ALI模型中显著抑制了NF-κB信号通路.
- 发现miR-199b-5p在IFN-γ-exos组下调,直接向AFTPH.
- 证明AFTPH与NF-κB p65相互作用,表明它在信号通路中的作用.
- 确定了miR-199b-5p/AFTPH轴作为IFN-γ-exos在ALI中抑制NF-κB信号传递的关键调解器.
结论:
- IFN-γ-primed hucMSC外体通过miR-199b-5p/AFTPH轴抑制ALI中的NF-κB信号通路.
- 这项研究阐明了一种用于ALI的基于外体的治疗的新型分子机制.
- 这些发现支持一种有希望的无细胞治疗方法来治疗急性肺损伤.
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