骨肌干细胞通过YY1-CCL5轴调节杜申肌缩症小鼠的利基功能
Yang Li1,2, Chuhan Li1, Qiang Sun1,2
1Department of Orthopaedics and Traumatology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong SAR, China.
Nature communications
|February 3, 2025
概括
在肌肉干细胞中删除阴阳1 (YY1) 通过破坏细胞相互作用,使肌肉衰竭恶化. 用Maraviroc阻断CCL5/CCR5信号,可以改善肌肉功能,提供一种潜在的治疗方法.
科学领域:
- 肌肉干细胞生物学 肌肉干细胞生物学
- 再生医学是一种再生医学.
- 免疫学 免疫学 免疫学
背景情况:
- 成人骨肌干细胞 (MuSCs) 对于肌肉修复至关重要,但在肌肉发育不良时是失调的.
- 巨细胞 (MPs) 和纤维基原体 (FAPs) 与MuSCs相互作用,它们的放松调节有助于肌肉纤维化和炎症.
研究的目的:
- 为了调查转录因子阴阳1 (YY1) 在肌肉发育不良期间在MuSCs中的作用.
- 探索 MuSC 中 YY1 删除如何影响利基,并为疾病病理学做出贡献.
- 为了确定肌肉衰竭的潜在治疗点.
主要方法:
- 使用遗传模型在MuSC中内在删除YY1.
- 分析MP和FAP的组成和异质性.
- 在MuSC中评估免疫基因表达,包括Ccl5.5.
- 调查CCL5/CCR5信号轴及其在MP招聘和FAP清关中的作用.
- 使用Maraviroc.对CCL5/CCR5轴的药理学阻塞.
- 对YY1对Ccl5.5的转录调节进行了检查.
主要成果:
- 在MuSC中YY1删除通过改变MP和FAP群体而加剧肌肉发育不良.
- 在 MuSCs 中,YY1 损失会诱导免疫基因表达,特别是 Ccl5.
- CCL5分泌促进MP的招募,并通过TGFβ1阻碍FAP的清除,使纤维化恶化.
- 用马拉维洛克阻断CCL5/CCR5轴可缓解衰变并改善肌肉性能.
- 通过调节增强剂-促进剂循环,YY1直接抑制了Ccl5的转录.
结论:
- MuSCs积极塑造他们的利基,YY1在这个过程中发挥着关键作用.
- MuSC中的YY1-CCL5轴是肌肉衰竭中炎症和纤维化的关键驱动因素.
- 准CCL5/CCR5通路是肌肉发育不良的有希望的治疗策略.
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