来自骨髓介质干细胞的细胞外囊泡通过micro-7045-5p改善肝纤维化
Zhejun Liu1, Xiaodan Jiang1, Hongjie You2
1School of Traditional Chinese Medicine, Capital Medical University, Beijing, China.
Molecular and cellular biochemistry
|November 8, 2024
概括
骨髓介质干细胞衍生的细胞外囊泡 (BMSC-EVs) 促进肝星细胞 (HSCs) 的自,并缓解肝纤维化. BMSC-EVs提供miR-7045-5p以抑制PI3K/Akt/mTOR通路,为肝纤维化提供潜在的治疗策略.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 再生医学是一种再生医学.
背景情况:
- 肝纤维化是慢性肝病中的一个进展性疾病.
- 骨髓介质干细胞衍生的细胞外囊泡 (BMSC-EVs) 显示出治疗肝纤维化的前景.
- 肝纤维化中BMSC-EVs的精确机制仍在研究中.
研究的目的:
- 研究含有miR-7045-5p的BMSC-EVs在肝纤维化期间调节肝星细胞 (HSC) 自中的作用.
- 阐明BMSC-EVs影响HSC激活和纤维生成的分子机制.
主要方法:
- 对BMSC-EVs的隔离和表征.
- 在HSC中评估BMSC-EV的吸收和局部化.
- 评估BMSC-EVs对HSC纤维化激活和自标记物的影响,使用西部抹杀,qRT-PCR和ELISA.
- 分析与自相关的信号通路 (PI3K/Akt/mTOR).
- 鉴定和验证miR-7045-5p在BMSC-EVs治疗效果中的作用.
主要成果:
- 证实BMSC-EV已经被HSC采用.
- 在HSC中,BMSC-EV抑制了纤维激活标记物 (COL1-A1,α-SMA) 和调制的自标记物 (p62,Atg16L1,Beclin-1,LC3).
- miR-7045-5p被富含BMSC-EVs,并针对Akt.
- 在CCl4诱导的小鼠模型中,BMSC-EV-miR-7045-5p通过抑制PI3K/Akt/mTOR通路改善了肝纤维化.
- miR-7045-5p抑制了TGF-β1诱导的HSC激活.
结论:
- BMSC-EVs促进HSC自和减轻肝纤维化.
- 治疗效果至少部分通过提供像miR-7045-5p这样的抗纤维性miRNAs来调节.
- 抑制PI3K/Akt/mTOR信号通路是BMSC-EVs抗纤维性作用的关键机制.
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