Xia C, Seo YJ, Studstill CJ, Vijayan M, Wolf J. Transient inhibition of sphingosine kinases confers protection to influenza A virus infected mice. Antiviral Res. 2018 Aug 17. pii: S0166-3542(18)302
Influenza continues to pose a threat to public health by causing illness and mortality in humans. Discovering host factors that regulate influenza virus propagation is vital for the development of novel drugs. We have previously reported that sphingosine kinase (SphK) 1 promotes influenza A virus (IAV) replication in vitro. Here we demonstrate that the other isoform of SphK, SphK2 promotes the replication of influenza A virus (IAV) in cultured cells, and temporary inhibition of SphK1 or SphK2 enhances the host defense against influenza in mice. IAV infection led to an increased expression and phosphorylation of SphK2 in host cells. Furthermore, pharmacologic inhibition or siRNA-based knockdown of SphK2 attenuated IAV replication in vitro. Notably, oral administration of an SphK2-specific inhibitor substantially improved the viability of mice following IAV infection. In addition, the local instillation of an SphK1-specific inhibitor or an inhibitor that globally blocks SphK1 and SphK2 provided protection to IAV-infected mice. Collectively, our results indicate that both SphK1 and SphK2 function as proviral factors during IAV infection in vivo. Therefore, SphK1 and SphK2 represent potential host targets for therapeutics against influenza.
See Also:
Latest articles in those days:
- Establishment of Swine Primary Nasal, Tracheal, and Bronchial Epithelial Cell Culture Models for the Study of Influenza Virus Infection 20 hours ago
- Highly pathogenic avian influenza H5N1 virus infections in pinnipeds and seabirds in Uruguay: implications for bird-mammal transmission in South America 20 hours ago
- Development and evaluation of a multiplex real-time RT-PCR assay for simultaneous detection of H5, H7, and H9 subtype avian influenza viruses 1 days ago
- Evolutionary dynamics and comparative pathogenicity of clade 2.3.4.4b H5 subtype avian influenza viruses, China, 2021~2022 1 days ago
- Oxymatrine Modulation of TLR3 Signaling: A Dual-Action Mechanism for H9N2 Avian Influenza Virus Defense and Immune Regulation 2 days ago
[Go Top] [Close Window]