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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Leslie, Kristen L. Wehbi, Vanessa L. Song, Gyun Jee Barrick, Stacey Vilardaga, Jean-pierre Bisello, Alessandro Bauer, Philip M. |
| Description | Author Affiliation: Leslie KL ( From the Department of Pharmacology and Chemical Biology.) |
| Abstract | The interaction between vascular cells and macrophages is critical during vascular remodeling. Here we report that the scaffolding protein, ezrin-binding phosphoprotein 50 (EBP50), is a central regulator of macrophage and vascular smooth muscle cells (VSMC) function. EBP50 is up-regulated in intimal VSMC following endoluminal injury and promotes neointima formation. However, the mechanisms underlying these effects are not fully understood. Because of the fundamental role that inflammation plays in vascular diseases, we hypothesized that EBP50 mediates macrophage activation and the response of vessels to inflammation. Indeed, EBP50 expression increased in primary macrophages and VSMC, and in the aorta of mice, upon treatment with LPS or TNF . This increase was nuclear factor-κB (NF-κB)-dependent. Conversely, activation of NF-κB was impaired in EBP50-null VSMC and macrophages. We found that inflammatory stimuli promote the formation of an EBP50-PKCζ complex at the cell membrane that induces NF-κB signaling. Macrophage activation and vascular inflammation after acute LPS treatment were reduced in EBP50-null cells and mice as compared with WT. Furthermore, macrophage recruitment to vascular lesions was significantly reduced in EBP50 knock-out mice. Thus, EBP50 and NF-κB participate in a feed-forward loop leading to increased macrophage activation and enhanced response of vascular cells to inflammation. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 51 |
| Volume Number | 288 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2013-12-20 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Feedback, Physiological NF-kappa B Metabolism Phosphoproteins Sodium-Hydrogen Antiporter Vasculitis Animals Aorta Human Umbilical Vein Endothelial Cells Drug Effects Physiology Lipopolysaccharides Pharmacology Macrophages Mice Mice, Inbred C57BL Myocytes, Smooth Muscle Genetics Protein Kinase C Tumor Necrosis Factor-alpha Etiology Research Support, N.I.H., Extramural 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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