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Protein Prenylation Drives Discrete Signaling Programs for the Differentiation and Maintenance of Effector T-reg Cells

机译:蛋白质旺苯化驱动离散的信号传导程序,用于分化和维持效应T-Reg细胞

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摘要

Effector regulatory T (eT(reg)) cells are essential for immune tolerance and depend upon T cell receptor (TCR) signals for generation. The immunometabolic signaling mechanisms that promote the differentiation and maintenance of eT(reg) cells remain unclear. Here, we show that isoprenoid-dependent posttranslational lipid modifications dictate eT(reg) cell accumulation and function by intersecting with TCR-induced intracellular signaling. We find that isoprenoids are essential for activated T-reg cell suppressive activity, and T-reg cell-specific deletion of the respective farnesylation- and geranylgeranylation-promoting enzymes Fntb or Pggt1b leads to the development of fatal autoimmunity, associated with reduced eT(reg) cell accumulation. Mechanistically, Fntb promotes eT(reg) cell maintenance by regulating mTORC1 activity and ICOS expression. In contrast, Pggt1b acts as a rheostat of TCR-dependent transcriptional programming and Rac-mediated signaling for establishment of eT(reg) cell differentiation and immune tolerance. Therefore, our results identify bidirectional metabolic signaling, specifically between immunoreceptor signaling and metabolism-mediated posttranslational lipid modifications, for the differentiation and maintenance of eT(reg) cells.
机译:效应调节性T(eT(reg))细胞对免疫耐受至关重要,依赖T细胞受体(TCR)信号产生。促进eT(reg)细胞分化和维持的免疫代谢信号机制尚不清楚。在这里,我们表明类异戊二烯依赖性翻译后脂质修饰通过与TCR诱导的细胞内信号交叉来决定eT(reg)细胞的积累和功能。我们发现类异戊二烯对激活的T-reg细胞抑制活性至关重要,并且T-reg细胞特异性缺失相应的法尼基化和香叶基化促进酶Fntb或Pggt1b会导致致命性自身免疫的发展,与eT(reg)细胞积聚减少有关。机制上,Fntb通过调节mTORC1活性和ICOS表达促进eT(reg)细胞的维持。相反,Pggt1b作为TCR依赖的转录编程和Rac介导的信号转导的变阻器,用于建立eT(reg)细胞分化和免疫耐受。因此,我们的结果确定了双向代谢信号,特别是在免疫受体信号和代谢介导的翻译后脂质修饰之间,用于eT(reg)细胞的分化和维持。

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  • 来源
    《Cell metabolism》 |2020年第6期|共24页
  • 作者单位

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Pathol Memphis TN 38105 USA;

    St Jude Childrens Res Hosp Dept Immunol Memphis TN 38105 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 内分泌腺疾病及代谢病;
  • 关键词

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