Direct activation of TACE-mediated ectodomain shedding by p38 MAP kinase regulates EGF receptor-dependent cell proliferation.
Direct activation of TACE-mediated ectodomain shedding by p38 MAP kinase regulates EGF receptor-dependent cell proliferation.
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DOI:
10.1016/j.molcel.2010.01.034
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发表时间:
2010-02-26
期刊:
影响因子:
16
通讯作者:
Derynck R
中科院分区:
文献类型:
--
作者:
Xu P;Derynck R
Inflammatory stimuli activate ectodomain shedding of TNF-α, L-selectin and other transmembrane proteins. We show that p38 MAP kinase, which is activated in response to inflammatory or stress signals, directly activates TACE, a membrane-associated metalloprotease that effects shedding in response to growth factors and Erk MAP kinase activation. p38α MAP kinase interacts with the cytoplasmic domain of TACE, and phosphorylates it on Thr735, which is required for TACE-mediated ectodomain shedding. Activation of TACE by p38 MAP kinase results in the release of TGF-α family ligands, which activate EGF receptor signaling leading to enhanced cell proliferation. Conversely, depletion of p38α MAP kinase activity suppresses EGF receptor signaling and downstream Erk MAP kinase signaling, as well as autocrine EGF receptor-dependent proliferation. Autocrine EGF receptor activation through TACE-mediated ectodomain shedding intimately links inflammation and cancer progression, and may play a role in stress and conditions that relate to p38 MAP kinase activation.
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