通过转录基因分析揭示了T细胞中低甲基化诱导的调节程序
Memnon Lysandrou1, Panagiota Stamou1, Dionysia Kefala1
1Bone Marrow Transplantation Unit and Institute of Cell Therapy, University of Patras, Rio, Greece.
Frontiers in immunology
|October 13, 2023
概括
低甲基化剂将T细胞转化为强大的诱导调节性T细胞 (iTregs),表达HLA-G. 这些通过RNA-seq分离的HLA-G阳性 (G+) 细胞显示出独特的免疫抑制机制,与FOXP3.3不同.
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:
- 调节性T细胞 (Tregs) 对免疫耐受性和预防自身免疫性疾病至关重要.
- 自然存在的Tregs (nTregs) 依赖于表观遗传调节,但诱导的Tregs (iTregs) 缺乏明确的身份和机制.
- 低甲基化剂 (HA) 可以将T细胞转化为具有抑制性能的iTregs (HA-iTregs).
研究的目的:
- 阐明HA诱导的iTregs (HA-iTregs) 的分子特征和机制.
- 为了确定特定的标记物来隔离强烈抑制HA-iTreg群体.
- 为了比较抑制性 (G+) 和非抑制性 (G-) HA-iTregs 的转录组特征.
主要方法:
- 使用低甲基化剂 (HA) 的T细胞转化.
- 隔离HLA-G阳性 (G+) 和HLA-G阴性 (G-) 细胞群.
- 高通量RNA测序 (RNA-seq) 和单细胞RNA-seq分析.
- 细胞因子分析和基因表达分析 (IDO-1,CCL17/22).
主要成果:
- HA-iTregs表现出一个明显的抑制子集 (G+细胞),标志着新的HLA-G表达.
- G+细胞显示上调的免疫反应通路和类似nTregs的分子特征.
- FOXP3和T-辅助特征在G+细胞抑制功能中起小作用.
- 在G+细胞中观察到髓质抑制基因 (IDO-1,CCL17/22) 的异位表达.
结论:
- 这项研究定义了一个强大的HA-iTreg群体 (G+细胞) 的分子特征.
- HLA-G作为一种可靠的标记物,用于隔离抑制HA-iTregs.
- HA-iTreg功能可能涉及新的,异位骨髓特定的抑制机制.
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