| First Author | Nagarkar DR | Year | 2009 |
| Journal | J Immunol | Volume | 183 |
| Issue | 10 | Pages | 6698-707 |
| PubMed ID | 19864593 | Mgi Jnum | J:157178 |
| Mgi Id | MGI:4430140 | Doi | 10.4049/jimmunol.0900298 |
| Citation | Nagarkar DR, et al. (2009) CXCR2 is required for neutrophilic airway inflammation and hyperresponsiveness in a mouse model of human rhinovirus infection. J Immunol 183(10):6698-707 |
| abstractText | Human rhinovirus (RV) infection is responsible for the majority of virus-induced asthma exacerbations. Using a mouse model of human RV infection, we sought to determine the requirement of CXCR2, the receptor for ELR-positive CXC chemokines, for RV-induced airway neutrophilia and hyperresponsiveness. Wild-type and CXCR2(-/-) mice were inoculated intranasally with RV1B or sham HeLa cell supernatant. Following RV1B infection, CXCR2(-/-) mice showed reduced airway and lung neutrophils and cholinergic responsiveness compared with wild-type mice. Similar results were obtained in mice treated with neutralizing Ab to Ly6G, a neutrophil-depleting Ab. Lungs from RV-infected, CXCR2(-/-) mice showed significantly reduced production of TNF-alpha, MIP-2/CXCL2, and KC/CXCL1 and lower expression of MUC5B compared with RV-treated wild-type mice. The requirement of TNF-alpha for RV1B-induced airway responses was tested using TNFR1(-/-) mice. TNFR1(-/-) animals displayed reduced airway responsiveness to RV1B, even when exogenous MIP-2 was added to the airways. We conclude that CXCR2 is required for RV-induced neutrophilic airway inflammation and that neutrophil TNF-alpha release is required for airway hyperresponsiveness. |
