在对IL-12治疗的反应中,PRMT5调节了抑制Th1类iTregs的表观遗传变化
Nidhi Jadon1, Sudarvili Shanthalingam2, Gregory N Tew3
1Graduate Program in Animal Biotechnology and Biomedical Sciences, Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, MA, United States.
Frontiers in immunology
|January 23, 2024
概括
治疗性T辅助1样诱导调节性T细胞 (iTregs) 显示增强的抑制功能. 蛋白质氨酸甲基转移酶5 (PRMT5) 调节这些细胞,为无形性贫血 (AA) 治疗提供了潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 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:
- 诱导调节T细胞 (iTregs) 是具有治疗潜力的免疫抑制免疫细胞.
- 调节器的可塑性允许获得类似于T效应器的能力,例如类似于T助手1 (Th1) 的iTregs.
- 无形性贫血 (AA) 是一种自身免疫性疾病,涉及免疫介导的骨髓干细胞的破坏.
研究的目的:
- 调查蛋白质氨酸甲基转移酶5 (PRMT5) 在Th1-类iTregs中的作用.
- 要了解iTregs.中sirtuin 1 (Sirt1) 的PRMT5调节.
- 评估Th1-like iTregs作为潜在的基于细胞的AA治疗方法.
主要方法:
- 使用IL-12生成Th1-类iTregs并评估它们的抑制能力.
- 通过基因组对称的阿尔金因二甲基化 (H3R2me2s) 测量了PRMT5酶活性.
- 利用ChIP测序和淘汰实验来验证PRMT5的作用,并在AA的小鼠模型中测试Th1-like iTregs.
主要成果:
- 治疗IL-12增强了iTreg抑制功能,并增加了PRMT5活性 (H3R2me2s).
- 发现H3R2me2s在Th1-like iTregs中结合了Sirt1促进子,降低了Sirt1的表达.
- 在AA的小鼠模型中,给予Th1-like iTregs可以改善生存率.
结论:
- PRMT5对于Th1类iTregs的优越抑制能力和稳定性至关重要.
- Th1-类iTregs在治疗无质性贫血方面显示出治疗潜力.
- 抑制PRMT5会降低Th1-类iTregs的抑制能力.
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