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Dynamic expression of transcription factors T-bet and GATA-3 by regulatory T cells maintains immunotolerance

机译:调节性T细胞动态表达转录因子T-bet和GATA-3维持免疫耐受

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摘要

Regulatory T cells (T-reg cells) can express the transcription factors T-bet and GATA-3, but the function of this expression and whether such cells represent stable subsets is still unknown. By using various reporter tools, we found that the expression of T-bet and GATA-3 in T-reg cells was dynamically influenced by the cytokine environment. T-reg cell-specific deletion of the gene encoding either T-bet (Tbx21) or GATA-3 (Gata3) alone did not result in loss of T-reg cell function; however, mice with combined deficiency in both genes in T-reg cells developed severe autoimmune-like diseases. Loss of T-reg cell function correlated with upregulation of expression of the transcription factor ROR gamma t and reduced expression of the transcription factor Foxp3. Thus, in the steady state, activated T-reg cells transiently upregulated either T-bet or GATA-3 to maintain T cell homeostasis.
机译:调节性T细胞(T-reg细胞)可以表达转录因子T-bet和GATA-3,但是这种表达的功能以及这种细胞是否代表稳定的亚组仍然是未知的。通过使用各种报告工具,我们发现T-reg细胞中T-bet和GATA-3的表达受到细胞因子环境的动态影响。单独编码T-bet(Tbx21)或GATA-3(Gata3)的基因的T-reg细胞特异性缺失并没有导致T-reg细胞功能的丧失。然而,在T-reg细胞中这两种基因都缺乏的小鼠发展出严重的自身免疫性疾病。 T-reg细胞功能的丧失与转录因子RORγt的表达上调和转录因子Foxp3的表达降低有关。因此,在稳定状态下,活化的T-reg细胞会瞬时上调T-bet或GATA-3,以维持T细胞的稳态。

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