Title | Respiratory virus-induced EGFR activation suppresses IRF1-dependent interferon lambda and antiviral defense in airway epithelium. | ||
Author | Ueki, Iris F; Min-Oo, Gundula; Kalinowski, April; Ballon-Landa, Eric; Lanier, Lewis L; Nadel, Jay A; Koff, Jonathan L | ||
Journal | J Exp Med | Publication Year/Month | 2013-Sep |
PMID | 23999497 | PMCID | PMC3782052 |
Affiliation | 1.Department of Medicine, 2 Cardiovascular Research Institute, 3 Department of Microbiology and Immunology, and 4 Cancer Research Institute, University of California, San Francisco, San Francisco, CA 94122. |
Viruses suppress host responses to increase infection, and understanding these mechanisms has provided insights into cellular signaling and led to novel therapies. Many viruses (e.g., Influenza virus, Rhinovirus [RV], Cytomegalovirus, Epstein-Barr virus, and Hepatitis C virus) activate epithelial epidermal growth factor receptor (EGFR), a tyrosine kinase receptor, but the role of EGFR in viral pathogenesis is not clear. Interferon (IFN) signaling is a critical innate antiviral host response and recent experiments have implicated IFN-lambda, a type III IFN, as the most significant IFN for mucosal antiviral immune responses. Despite the importance of IFN-lambda in epithelial antiviral responses, the role and mechanisms of epithelial IFN-lambda signaling have not been fully elucidated. We report that respiratory virus-induced EGFR activation suppresses endogenous airway epithelial antiviral signaling. We found that Influenza virus- and RV-induced EGFR activation suppressed IFN regulatory factor (IRF) 1-induced IFN-lambda production and increased viral infection. In addition, inhibition of EGFR during viral infection augmented IRF1 and IFN-lambda, which resulted in decreased viral titers in vitro and in vivo. These findings describe a novel mechanism that viruses use to suppress endogenous antiviral defenses, and provide potential targets for future therapies.