一个Foxp3 cis元素在保护调节性T细胞身份的功能
Xudong Li1, Yuqiong Liang1, Mathias LeBlanc1
1Nomis Foundation Laboratories for Immunobiology and Microbial Pathogenesis, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.
Cell
|August 16, 2014
概括
一个特定的DNA元素,保存的非编码序列2 (CNS2),保护调节性T (Treg) 细胞的身份. 这种表观遗传机制维持免疫平衡,并通过感知环境线索来预防自身免疫性疾病.
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.
- 细胞生物学 细胞生物学
背景情况:
- 多细胞生物依赖于终端分化的细胞来保持恒常的血统特异性.
- 调节性T (Treg) 细胞对于免疫平衡至关重要,由转录因子Foxp3.3定义.
- 保护细胞身份免受塑性赋予环境线索的机制尚不清楚.
研究的目的:
- 调查表观遗传机制是否保护Treg细胞身份免受环境信号的影响.
- 阐明保存非编码序列2 (CNS2) 在维持Treg细胞稳定性和功能中的作用.
主要方法:
- 对CNS2的分析,是一种CpG丰富的Foxp3内性cis元素,在成熟的Tregs中脱甲基化.
- 研究 CNS2 与激活 Tregs 中的 Foxp3 促进体的相互作用.
- 评估TCR/NFAT激活对中枢神经系统2功能的影响.
主要成果:
- 中枢神经系统2在成熟的Tregs中被特别去甲基化,并在免疫恒常中发挥作用.
- CNS2保护激活Tregs中的Foxp3表达,防止破坏细胞因子条件的稳定.
- 中枢神经系统2感知TCR/NFAT激活,促进其与Foxp3促进体的相互作用.
结论:
- 像CNS2这样的表观遗传标记的cis元素可以保护细胞的身份.
- CNS2通过感知环境线索来保护Treg细胞的身份,这对于分化和可塑性至关重要.
- 这种机制维持免疫平衡,并限制自身免疫性疾病的发展,而不妨碍初始细胞分化.
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