The kinase p38 activated by the metabolic regulator AMPK and scaffold TAB1 drives the senescence of human T cells.
The kinase p38 activated by the metabolic regulator AMPK and scaffold TAB1 drives the senescence of human T cells.
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In T lymphocytes, p38 MAP kinase (MAPK) regulates pleiotropic functions and is activated by canonical MAPK signaling or the alternative T cell receptor (TCR) activation pathway. Here we show that senescent human T cells lack the canonical and alternative pathways of p38 activation, but spontaneously engage the metabolic master regulator AMPK to trigger p38 recruitment to the scaffold TAB1 causing p38 auto-phosphorylation. Signaling via this pathway inhibits telomerase activity, T cell proliferation and expression of key components of the TCR signalosome. Our findings identify an unrecognized mode of p38 activation in T cells driven by intracellular changes such as low-nutrient and DNA-damage signaling (‘intra-sensory’ pathway). The proliferative defect of senescent T cells is reversed by blocking AMPK-TAB1-dependent p38 activation.
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影响因子:
16.8
作者:
De Nicola, Gian Felice;Martin, Eva Denise;Chaikuad, Apirat;Bassi, Rekha;Clark, James;Martino, Luigi;Verma, Sharwari;Sicard, Pierre;Tata, Renee;Atkinson, R. Andrew;Knapp, Stefan;Conte, Maria R.;Marber, Michael S.
通讯作者:
Marber, Michael S.
DOI:
10.1073/pnas.0610216104
发表时间:
2007-01-16
影响因子:
11.1
作者:
Blaettler, Sharon M.;Rencurel, Franck;Meyer, Urs A.
通讯作者:
Meyer, Urs A.
影响因子:
56.9
作者:
Ge, BX;Gram, H;Han, JH
通讯作者:
Han, JH
DOI:
10.1038/nri2888
发表时间:
2011-02
期刊:
Nature reviews. Immunology
影响因子:
--
作者:
通讯作者:
--
影响因子:
64.5
作者:
Chang CH;Curtis JD;Maggi LB Jr;Faubert B;Villarino AV;O'Sullivan D;Huang SC;van der Windt GJ;Blagih J;Qiu J;Weber JD;Pearce EJ;Jones RG;Pearce EL
通讯作者:
Pearce EL