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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ely, Kenneth H. Enelow, Richard I. DeBerge, Matthew P. |
| Description | Author Affiliation: DeBerge MP ( Department of Medicine, Geisel School of Medicine at Dartmouth College, Lebanon, NH 03756); Ely KH ( Department of Medicine, Geisel School of Medicine at Dartmouth College, Lebanon, NH 03756); Enelow RI ( Department of Medicine, Geisel School of Medicine at Dartmouth College, Lebanon, NH 03756) |
| Abstract | TNF- is a pleotropic cytokine that has both proinflammatory and anti-inflammatory functions during influenza infection. TNF- is first expressed as a transmembrane protein that is proteolytically processed to release a soluble form. Transmembrane TNF- (memTNF- ) and soluble TNF- (solTNF- ) have been shown to exert distinct tissue-protective or tissue-pathologic effects in several disease models. However, the relative contributions of memTNF- or solTNF- in regulating pulmonary immunopathology following influenza infection are unclear. Therefore, we performed intranasal influenza infection in mice exclusively expressing noncleavable memTNF- or lacking TNF- entirely and examined the outcomes. We found that solTNF- , but not memTNF- , was required to limit the size of the immune response and the extent of injury. In the absence of solTNF- , there was a significant increase in the CD8(+) T cell response, including virus-specific CD8(+) T cells, which was due in part to an increased resistance to activation-induced cell death. We found that solTNF- mediates these immunoregulatory effects primarily through TNFR1, because mice deficient in TNFR1, but not TNFR2, exhibited dysregulated immune responses and exacerbated injury similar to that observed in mice lacking solTNF- . We also found that solTNF- expression was required early during infection to regulate the magnitude of the CD8(+) T cell response, indicating that early inflammatory events are critical for the regulation of the effector phase. Taken together, these findings suggest that processing of memTNF- to release solTNF- is a critical event regulating the immune response during influenza infection. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1302729 |
| Journal | The Journal of Immunology |
| Issue Number | 12 |
| Volume Number | 192 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2014-06-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cd8-positive T-lymphocytes Immunology Cell Membrane Influenza A Virus, H1n1 Subtype Orthomyxoviridae Infections Receptors, Tumor Necrosis Factor, Type I Tumor Necrosis Factor-alpha Animals Pathology Cell Death Genetics Mice Mice, Knockout Receptors, Tumor Necrosis Factor, Type Ii Solubility 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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