由TNF-α驱动的m6A修饰通过调节HDAC5-依赖的超级增强剂来破坏MSCs的免疫调节功能
Weihao Zhang1, Jiajie Lin1, Yi Zhou1
1Department of Orthopedics, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, China.
Cell death & disease
|December 23, 2025
概括
瘤坏死因子-α (TNF-α) 通过降低HDAC5来损害介质干细胞 (MSC),阻碍它们的免疫功能. 在MSC中过度表达HDAC5增强了它们对炎症疾病的治疗潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 干细胞生物学 干细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 介质干细胞 (MSC) 对于治疗炎症性疾病至关重要,因为它们具有免疫抑制性质.
- 炎症性微环境可以显著损害MSC的治疗疗效 in vivo.
- 瘤坏死因子-α (TNF-α) 是一个关键的炎症媒介,影响MSC功能.
研究的目的:
- 阐明TNF-α损害MSC免疫抑制功能的机制.
- 为了确定参与MSC功能障碍的表观遗传调节者.
- 制定策略,以提高MSC在炎症条件下的治疗潜力.
主要方法:
- 研究了TNF-α对MSC和T细胞增殖的影响.
- 分析了HDAC5,超级增强剂 (SE) 和白血病抑制因子 (LIF) 的表达.
- 利用m6A修饰试验 (WTAP,YTHDF2) 来研究mRNA的稳定性.
- 在炎症性关节炎的小鼠模型中测试了HDAC5-过度表达的MSCs的疗效.
主要成果:
- TNF-α治疗降低了HDAC5表达,导致SE活性和LIF表达增加,从而损害了MSC免疫抑制.
- 通过其mRNA的WTAP介导的m6A修改,TNF-α降低了HDAC5的调节,而YTHDF2降低了mRNA的稳定性.
- 在炎症性关节炎的小鼠中,静脉注射过度表达HDAC5的MSC显著改善了治疗结果.
结论:
- 一种新的表观遗传调节机制涉及超级增强剂和m6A修饰控制MSC免疫抑制功能.
- 针对HDAC5及其调节途径提供了一个有希望的策略,以增强MSC为基础的治疗炎症性疾病.
- 这项研究为改善MSCs在治疗炎症疾病中的临床应用提供了基础.
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