MEKK3 is required for lysophosphatidic acid-induced NF-kappaB activation.
MEKK3 is required for lysophosphatidic acid-induced NF-kappaB activation.
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DOI:
10.1016/j.cellsig.2009.05.007
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发表时间:
2009-10
影响因子:
4.8
通讯作者:
Yang J
中科院分区:
文献类型:
--
作者:
Sun W;Li H;Yu Y;Fan Y;Grabiner BC;Mao R;Ge N;Zhang H;Fu S;Lin X;Yang J
Lysophosphatidic acid (LPA) is a potent agonist that exerts various cellular functions on many cell types through binding to its cognate G protein-coupled receptors (GPCRs). Although LPA induces NF-κB activation by acting on its GPCR receptor, the molecular mechanism of LPA receptor-mediated NF-κB activation remains to be well defined. In the present study, by using MEKK3-, TAK1-, and IKKβ-deficient murine embryonic fibroblasts (MEFs), we found that MEKK3 but not TAK1 deficiency impairs LPA and protein kinase C (PKC)-induced IκB kinase (IKK)-NF-κB activation, and IKKβ is required for PKC-induced NF-κB activation. In addition, we demonstrate that LPA and PKC-induced IL-6 and MIP-2 production are abolished in the absence of MEKK3 but not TAK1. Together, our results provide the genetic evidence that MEKK3 but not TAK1 is required for LPA receptor-mediated IKK-NF-κB activation.
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