介酶干细胞通过抑制肝内B细胞的致病功能来缓解小鼠肝纤维化
Xudong Feng1, Bing Feng1, Jiahang Zhou1
1State Key Laboratory for the Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou City, China.
Hepatology (Baltimore, Md.)
|March 28, 2024
概括
介酶干细胞 (MSCs) 通过抑制亲纤维性肝脏内B细胞来改善肝纤维化. MSCs通过外体调节B细胞的增殖和细胞因子的产生,为肝纤维化提供了一种新的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 肝病学 肝病学是一种肝病学.
背景情况:
- 介酶干细胞 (MSC) 具有免疫调节特性,有利于治疗肝纤维化 (LF).
- 肝脏内B细胞与肺炎的发病有关,但它们的确切作用和与MSCs的相互作用仍然不清楚.
研究的目的:
- 调查MSCs抑制亲纤维性肝脏内B细胞活动的潜力.
- 阐明MSCs在LF的背景下调节B细胞功能的机制.
主要方法:
- 在LF的小鼠模型中给予MSCs.
- 单细胞RNA测序以表征肝脏内B细胞群.
- B细胞切除 (μMT小鼠) 和收养转移实验.
- 外体介导信号通路分析 (MAPK,NF-κB).
主要成果:
- MSC治疗显著降低了肝纤维化标志物,包括肌纤维细胞激活和原沉积.
- MSCs降低了肝内部B细胞的透,激活和促炎性细胞因子的产生.
- 在纤维性肝脏中,特定的纯粹B细胞亚型 (B-II) 被确定为丰富且具有炎症作用.
- B细胞枯竭或阻塞减弱了纤维化,而B细胞转移则重复了它,证实了它们的致病作用.
- MSCs通过外体抑制了B细胞的增殖和细胞因子的产生,向MAPK和NF-κB通路.
结论:
- 肝脏内B细胞是MSC介导的肝纤维化改善的关键目标.
- 通过调节B细胞活性,MSCs发挥治疗作用,突显出一种新的作用机制.
- 向肝脏内B细胞代表了肝纤维化的有前途的治疗途径.
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