在初级Sjogren综合征中,EZH2通过METTL3-介导的m6A修饰促进B细胞自身免疫
Yiying Yang1, Muyuan Li2, Liqing Ding3
1Department of Rheumatology, Xiangya Hospital, Central South University, Changsha, Hunan, China; Department of Pathophysiology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China; Sepsis Translational Medicine Key Lab of Hunan Province, Changsha, Hunan, China; Postdoctoral Research Station of Biology, School of Basic Medicine Science, Central South University, Changsha, Hunan, China.
Journal of autoimmunity
|November 22, 2024
概括
增强性肠道同源2 (EZH2) 在初级Sjögren综合征 (pSS) B细胞中被上调,导致自身免疫反应. 抑制EZH2通过减少B细胞激活和自身抗体的产生,为pSS提供了一个有希望的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 自免疫性疾病 自免疫性疾病
背景情况:
- 增强质同源2 (EZH2) 对于B细胞激活和分化至关重要.
- 主要Sjögren综合征 (pSS) 是一种由B细胞介导的自身免疫性疾病.
- EZH2在pSS病原体中的特定作用需要进一步阐明.
研究的目的:
- 调查EZH2在pSS中的B细胞自身免疫反应中的作用.
- 探索EZH2抑制对于pSS治疗的治疗潜力.
主要方法:
- 从pSS患者的外周血液B细胞的单细胞RNA测序.
- 在B细胞子集和唾液腺中验证EZH2和METTL3表达.
- 在Sjögren综合征试验小鼠模型中对EZH2抑制的评估.
- 通过RNA-seq,ChIP-seq和机械分析来确定EZH2的点和调节途径.
主要成果:
- 在PSS患者和小鼠模型的B细胞中,EZH2显著上调,与疾病活性相关 (ESSDAI).
- 抑制EZH2可缓解SS类症状,并减少小鼠自身抗体的产生.
- 在pSS中,METTL3也被上调,与疾病活性呈正相关性,并通过EZH2mRNA的m6A修饰促进EZH2的表达.
- 通过修改CDKN1A位点,EZH2抑制了B细胞亡并增强了增殖.
结论:
- 通过METTL3介导的EZH2上调有助于PSS中B细胞自身免疫反应.
- 抑制EZH2代表了治疗PSS的潜在治疗策略.
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