Londrigan SL, et al. IFITM3 and type I interferons are important for the control of influenza A virus replication in murine macrophages. Virology. 2019 Nov 5;540:17-22.
Abortive infection of macrophages serves as a "dead end" for most seasonal influenza A virus (IAV) strains, and it is likely to contribute to effective host defence. Interferon (IFN)-induced transmembrane protein 3 (IFITM3) restricts the early stages of IAV replication in epithelial cells, but IFITM3 restriction of IAV replication in macrophages has not been previously investigated. Herein, macrophages isolated from IFITM3-deficient mice were more susceptible to initial IAV infection, but late-stage viral replication was still controlled through abortive infection. Strikingly, IFNα/β receptor (IFNAR)-deficient macrophages infected with IAV were not only more susceptible to initial infection, but these cells also supported productive viral replication. Significantly, we have established that abortive IAV infection in macrophages is controlled through a type I IFN-dependent mechanism, where late-stage IAV replication can proceed in the absence of type I IFN responses. These findings provide novel mechanistic insight into macrophage-specific processes that potently shut down IAV replication.
See Also:
Latest articles in those days:
- Emergence of HPAI H5N6 Clade 2.3.4.4b in Wild Birds: A Case Study From South Korea, 2023 2 days ago
- Age-Dependent Pathogenesis of Influenza A Virus H7N9 Mediated Through PB1-F2-Induced Mitochondrial DNA Release and Activation of cGAS-STING-NF-κB Signaling 2 days ago
- Genotypic Clustering of H5N1 Avian Influenza Viruses in North America Evaluated by Ordination Analysis 2 days ago
- Protocol for enhanced human surveillance of avian influenza A(H5N1) on farms in Canada 3 days ago
- Evolutionary analysis of Hemagglutinin and neuraminidase gene variation in H1N1 swine influenza virus from vaccine intervention in China 3 days ago
[Go Top] [Close Window]