针对TGF-β信号的微RNA通过破坏调节性T细胞发育和功能来加剧中枢神经系统自身免疫
Christina N Rau1, Mary E Severin1,2, Priscilla W Lee1,3
1Department of Microbial Infection and Immunity, Wexner Medical Center, The Ohio State University, Columbus, Ohio, USA.
European journal of immunology
|April 18, 2024
概括
转化生长因子β (TGF-β) 信号干扰,通常涉及microRNAs (miRNAs),增加了对中枢神经系统 (CNS) 自免疫的敏感性,如多发性硬化症 (MS). 恢复TGF-β信号传递可能有助于恢复MS患者的免疫平衡.
科学领域:
- 免疫学 免疫学 免疫学
- 神经免疫学 神经免疫学
- 分子生物学分子生物学
背景情况:
- 转化增长因子β (TGF-β) 信号对于免疫平衡至关重要,对调节性T细胞 (Tregs) 进行调节,并抑制自身免疫反应.
- 失调的TGF-β信号与诸如多发性硬化症 (MS) 等自身免疫性疾病有关.
- 针对TGF-β信号的microRNAs (miRNAs) 在MS患者中被上调,从而损害了Treg生成.
研究的目的:
- 研究向TGF-β信号与miRNAs对中枢神经系统 (CNS) 自免疫力的影响.
- 在小鼠模型中确定TGF-β相关的miRNAs在实验性自身免疫脑膜炎 (EAE) 的发展中的作用.
主要方法:
- 使用了实验性自身免疫性脑膜炎 (EAE) 动物模型.
- 在新生小鼠的产周期间给药的针对TGF-β信号的miRNAs.
- 评估Treg频率,T细胞受体谱的多样性和成年时的T细胞受体群 (Th1,Th17).
主要成果:
- 在EAE模型中,对TGF-β向miRNAs的围产期服用增加了对中枢神经系统自身免疫的敏感性.
- 新生儿接触这些miRNA导致Treg频率降低,并在成年后减少T细胞受体谱的多样性.
- 在CD4T细胞中miRNA过度表达加剧了EAE,与Th1和Th17细胞频率的增加相关.
结论:
- 高水平的TGF-β关联小RNAs会影响Treg发育和多样性,促进T细胞活性.
- 这些miRNAs有助于增加对中枢神经系统自身免疫的敏感性,这表明它们是MS的潜在风险因素.
- 恢复最佳的TGF-β信号传递是一种潜在的治疗策略,用于MS中免疫恒温.
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