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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Griffin, Gabriel K. Lichtman, Andrew H. Azcutia, Veronica Alcaide, Pilar Croce, Kevin J. Maganto-Garcia, Elena Tarrio, Margarite L. Grabie, Nir Newton, Gail Bu, De-xiu Luscinskas, Francis W. |
| Description | Country affiliation: United States Author Affiliation: Griffin GK ( Duke University School of Medicine, Durham, NC 27710, USA.) |
| Abstract | IL-17A (IL-17) is the signature cytokine produced by Th17 cells and has been implicated in host defense against infection and the pathophysiology of autoimmunity and cardiovascular disease. Little is known, however, about the influence of IL-17 on endothelial activation and leukocyte influx to sites of inflammation. We hypothesized that IL-17 would induce a distinct pattern of endothelial activation and leukocyte recruitment when compared with the Th1 cytokine IFN-γ. We found that IL-17 alone had minimal activating effects on cultured endothelium, whereas the combination of TNF- and IL-17 produced a synergistic increase in the expression of both P-selectin and E-selectin. Using intravital microscopy of the mouse cremaster muscle, we found that TNF- and IL-17 also led to a synergistic increase in E-selectin-dependent leukocyte rolling on microvascular endothelium in vivo. In addition, TNF- and IL-17 enhanced endothelial expression of the neutrophilic chemokines CXCL1, CXCL2, and CXCL5 and led to a functional increase in leukocyte transmigration in vivo and CXCR2-dependent neutrophil but not T cell transmigration in a parallel-plate flow chamber system. By contrast, endothelial activation with TNF- and IFN-γ preferentially induced the expression of the integrin ligands ICAM-1 and VCAM-1, as well as the T cell chemokines CXCL9, CXCL10, and CCL5. These effects were further associated with a functional increase in T cell but not neutrophil transmigration under laminar shear flow. Overall, these data show that IL-17 and TNF- act in a synergistic manner to induce a distinct pattern of endothelial activation that sustains and enhances neutrophil influx to sites of inflammation. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1200385 |
| Journal | The Journal of Immunology |
| Issue Number | 12 |
| Volume Number | 188 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2012-06-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Endothelial Cells Metabolism Inflammation Interleukin-17 Neutrophil Infiltration Immunology Tumor Necrosis Factor-alpha Animals Chemokines Biosynthesis Flow Cytometry Leukocyte Rolling Mice Mice, Inbred C57bl Mice, Knockout Reverse Transcriptase Polymerase Chain Reaction T-lymphocytes Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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