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cMyc-p53 feedback mechanism regulates the dynamics of T lymphocytes in the immune response

机译:CMYC-P53反馈机制调节免疫应答中T淋巴细胞的动态

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摘要

Activation and proliferation of T cells are tightly regulated during the immune response. We show here that kinetics of proliferation of PHA activated T cells follows the expression of cMyc. Expression of p53 is also elevated and remains high several days after activation. To investigate the role of p53 in activated T cells, its expression was further elevated with nultin-3 treatment, a small molecule that dissociates the E3 ubiquitin protein ligase MDM2 from p53. Concomitantly, cMyc expression and proliferation decreased. At the other end of the cMyc-p53 axis, inhibition of cMyc with 10058-F4 led to down regulation of p53, likely through the lower level of cMyc induced p14ARF, which is also known to dissociate the p53-MDM2 complex. Both compounds induced cell cycle arrest and apoptosis. We conclude that the feedback regulation between cMyc and p53 is important for the T cell homeostasis. We also show that the two compounds modulating p53 and cMyc levels inhibited proliferation without abolishing the cytotoxic function, thus demonstrating the dichotomy between proliferation and cytotoxicity in activated T cells.
机译:在免疫应答期间,T细胞的活化和增殖严格调节。我们展示了PHA活化T细胞的增殖动力学遵循CMYC的表达。 P53的表达也升高,活化后几天仍然高。为了研究P53在活性T细胞中的作用,其表达进一步用Nultin-3处理升高,该小分子从P53解离E3泛素蛋白连接酶MDM2。伴随,CMYC表达和增殖降低。在CMYC-P53轴的另一端,具有10058-F4的CMYC的抑制导致P53的调节,可能通过CMYC诱导的P14ARF的较低水平,这也已知解离P53-MDM2复合物。两种化合物诱导细胞周期停滞和细胞凋亡。我们得出结论,CMYC和P53之间的反馈调节对于T细胞稳态是重要的。我们还表明,两种化合物调节P53和CMYC水平的化合物抑制增殖,而不消除细胞毒性功能,从而证明了活化T细胞中增殖和细胞毒性之间的二分法。

著录项

  • 来源
    《Cell cycle》 |2016年第9期|共9页
  • 作者单位

    Karolinska Inst Dept Microbiol Tumor &

    Cell Biol Nobels Vag 16 S-17177 Stockholm Sweden;

    Karolinska Inst Dept Microbiol Tumor &

    Cell Biol Nobels Vag 16 S-17177 Stockholm Sweden;

    Karolinska Inst Dept Microbiol Tumor &

    Cell Biol Nobels Vag 16 S-17177 Stockholm Sweden;

    Karolinska Inst Dept Microbiol Tumor &

    Cell Biol Nobels Vag 16 S-17177 Stockholm Sweden;

    Karolinska Inst Dept Microbiol Tumor &

    Cell Biol Nobels Vag 16 S-17177 Stockholm Sweden;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 细胞生物学;
  • 关键词

    apoptosis; cMyc; nutlin-3; p53; T cells; 10058-F4;

    机译:细胞凋亡;CMYC;Nutlin-3;P53;T细胞;10058-F4;

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