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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zhang, Jing Shu, Hong-bing Zheng, Hao Li, Qi He, Xiao Chen, Rui Li, Shu Ran, Yong |
| Description | Author Affiliation: Zheng H ( College of Life Sciences, Wuhan University, Wuhan 430072, China.) |
| Abstract | The transcription factor NF-κB is critically involved in the inflammatory response triggered by the proinflammatory cytokines TNF and IL-1. Various studies have demonstrated that activation of TAK1 (TGF-ß-activated kinase 1) is an essential step in TNF- and IL-1-induced NF-κB activation pathways. In this study, we identified a member of the dual-specificity phosphatase family, DUSP14, as a negative regulator of TNF- and IL-1-triggered NF-κB activation by expression screens. We found that DUSP14 interacted with TAK1 and that this interaction was enhanced by TNF or IL-1 stimulation. Overexpression of DUSP14 dephosphorylated TAK1 at Thr-187, a residue in the activation loop critically involved in TAK1 activation. Knockdown of DUSP14 increased basal as well as TNF- and IL-1-induced TAK1 phosphorylation at Thr-187. Overexpression of DUSP14, but not its phosphatase-deficient mutant, inhibited TNF- and IL-1-induced as well as TAK1-mediated NF-κB activation, whereas knockdown of DUSP14 had opposite effects. These findings suggest that DUSP14 negatively regulates TNF- or IL-1-induced NF-κB activation by dephosphorylating TAK1 at Thr-187. Our study reveals a new post-translational regulatory mechanism of NF-κB activation triggered by the proinflammatory cytokines. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 2 |
| Volume Number | 288 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2013-01-11 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Dual-Specificity Phosphatases Physiology Interleukin-1 MAP Kinase Kinase Kinases Metabolism Mitogen-Activated Protein Kinase Phosphatases NF-kappa B Tumor Necrosis Factor-alpha Cell Line Genetics Gene Knockdown Techniques Phosphorylation Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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