甲基转移酶Setd2通过脂重塑预防T细胞介导的自身免疫性疾病
概括
酶Setd2通过改变细胞代谢来抑制炎症性Th17细胞并促进调节性T (Treg) 细胞. 这种T细胞平衡的表观遗传调节为神经炎症疾病提供了潜在的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 细胞代谢 细胞代谢
背景情况:
- 包括T辅助细胞17 (Th17) 和调节性T (Treg) 细胞在内的T细胞分化对于免疫恒温至关重要.
- 代谢重编程和表观遗传修饰是T细胞功能的关键调节者.
- 将表观遗传控制与T细胞代谢重编程和平衡联系在一起的精确机制在很大程度上是未知的.
研究的目的:
- 研究表观遗传修饰剂Setd2在调节Th17/Treg细胞平衡中的作用.
- 阐明Setd2通过代谢途径影响T细胞分化的分子机制.
- 探索Setd2在神经炎症疾病中的治疗潜力.
主要方法:
- 利用小鼠模型和初级T细胞培养.
- 采用了诸如H3K36me3的ChIP-seq,RNA-seq和脂质组分析等技术.
- 在实验性自身免疫脑膜炎 (EAE) 中评估T细胞分化,细胞因子生产和疾病严重程度.
主要成果:
- 缺少Setd2会影响调节性T细胞 (iTreg) 两极分化,并促进Th17细胞的发育.
- Setd2 直接催化 Lpcat4 基因促进体的 H3K36 三甲基化,对其表达进行上调调节.
- 通过lpcat4介导的脂重塑可以减少内分泌网膜和氧化应激,抑制HIF-1α活性,促进Treg分化.
- 在EAE模型中,由于Th17/Treg不平衡,Setd2的损失会加剧神经炎症和脱髓化.
结论:
- Setd2 作为一种关键的表观遗传调节剂,抑制 Th17 细胞的发育,并通过脂重塑促进 iTreg 细胞的极化.
- Setd2 作为T细胞介导的自身免疫的表观遗传制动作用.
- 针对Setd2介导的途径可能为诸如多发性硬化症等神经炎症性疾病提供新的治疗策略.
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