在SLE CD4+T细胞中,SETD3通过操纵基因素甲基化和乙化来调节Bcl-6表达和Tfh分化
Shu Ding1, Shengjie Xue2, Yu Rao1
1Department of Dermatology, The Third Xiangya Hospital of Central South University, #138 Tong Zipo Road, Changsha, 410013, Hunan, China.
Clinical epigenetics
|November 22, 2025
概括
系统性红斑狼 (SLE) CD4+ T细胞显示SETD3的升高,该细胞通过修改其促进体来调节Bcl-6的表达. 在SLE患者中抑制SETD3可降低Bcl-6表达和Tfh细胞分化.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 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:
- 在SLE病变发生过程中,Tfh细胞是关键.
- 在SLE CD4+ T细胞中,SETD3被上调,并影响CXCR5的表达.
- 需要澄清SETD3在基因素修饰和Tfh细胞调节中的机制,特别是Bcl-6.
研究的目的:
- 研究SETD3在Tfh细胞分化中的分子机制.
- 为了确定SETD3是否直接调节Bcl-6表达.
- 探索SETD3在SLE发病过程中的作用.
主要方法:
- 在Tfh细胞分化过程中对SETD3表达的分析.
- 与SETD3表达和评估BCL-6水平和Tfh差异化的干扰.
- 染色体免疫沉试验检查Bcl-6促进体中的组素修饰.
- 对SETD3和基因组修饰酶之间的蛋白相互作用进行分析.
主要成果:
- 在Tfh细胞分化过程中,SETD3表达是持续的.
- 抑制SETD3阻碍了Bcl-6的表达和Tfh细胞的分化.
- SETD3与NSD3,SMYD2,p300和CBP相互作用,在Bcl-6促进体中调解H3K4me3/K36me3和H3K9ac/K14ac的修饰,从而上调Bcl-6.
- 由于SETD3介导的相关酶的上调,SLE CD4+ T细胞在Bcl-6促进体的H3K4me3/K36me3和H3K9ac/K14ac增加.
结论:
- 在SLE CD4+ T细胞中SETD3升高将NSD3,SMYD2,p300和CBP招募到Bcl-6促进体中.
- 这种招募导致素H3K4/K36甲基化和H3K9/K14乙化增加.
- 表观遗传修改调节Bcl-6的上调,有助于SLE中的Tfh细胞分化.
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