TET蛋白调节Drosha表达并影响iNKT细胞中的微RNA
Marianthi Gioulbasani1,2, Tarmo Äijö1, Jair E Valenzuela1,3
1Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
bioRxiv : the preprint server for biology
|August 12, 2024
概括
DNA脱甲基酶TET2和TET3调节微RNA的产生,影响不变的自然杀手T (iNKT) 细胞分化. 这些酶的损失会影响Drosha和Let-7微RNA,影响iNKT细胞中的PLZF表达.
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.
- 分子生物学分子生物学
背景情况:
- TET2和TET3是DNA脱甲基酶,对于不变的自然杀手T (iNKT) 细胞分化至关重要.
- 矛盾的是,TET2/3的损失会对iNKT细胞中的几种基因产生上调,这表明基因抑制剂的调节.
研究的目的:
- 研究iNKT细胞中TET2/3介导基因调节背后的机制.
- 探索TET2/3在微RNA生物发生中的作用及其对iNKT细胞分化的影响.
主要方法:
- 在iNKT细胞中对TET2和TET3损失的基因表达变化的分析.
- 染色体免疫沉和5-基甲基细胞素 (5hmC) 分析,以评估TET蛋白活性.
- 研究微RNA表达,包括Let-7家族及其点.
主要成果:
- TET2和TET3通过DNA脱甲基和染色质可访问性协同调节Drosha表达.
- 失去TET2/3导致特定微RNA的下调,包括Let-7家族.
- 下调的Let-7微RNA通常会抑制PLZF,这是一个iNKT细胞系特异因子.
结论:
- 通过Drosha,TET蛋白调节microRNA生物发生,为TET介导的基因表达控制增加了一个新层.
- 这一途径将TET介导的表观遗传调节与基于微RNA的iNKT细胞分化的控制联系起来.
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