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• W2019948656 abstract "ABSTRACT Mammalian cells produce many proteins, such as IFITM3, ISG15, MxA, and viperin, that inhibit influenza A virus (IAV) infection. Here, we show that a new class of host protein, histone deacetylase 6 (HDAC6), inhibits IAV infection. We found that HDAC6-overexpressing cells release about 3-fold less IAV progeny, whereas HDAC6-depleted cells release about 6-fold more IAV progeny. The deacetylase activity of HDAC6 played a role in its anti-IAV function as tubacin, a specific small-molecule inhibitor of HDAC6, increased the release of IAV progeny in a dose-dependent manner. Further, as visualized by electron microscopy, tubacin-treated cells showed an increase in IAV budding at the plasma membrane, the site of IAV assembly. Tubacin is a domain-specific inhibitor and binds to one of the two HDAC6 catalytic domains possessing tubulin deacetylase activity. This indicated the potential involvement of acetylated microtubules in the trafficking of viral components to the plasma membrane. Indeed, as quantified by flow cytometry, there was about a 2.0- to 2.5-fold increase and about a 2.0-fold decrease in the amount of viral envelope protein hemagglutinin present on the plasma membrane of tubacin-treated/HDAC6-depleted and HDAC6-overexpressing cells, respectively. In addition, the viral ribonucleoprotein complex was colocalized with acetylated microtubule filaments, and viral nucleoprotein coimmunoprecipitated with acetylated tubulin. Together, our findings indicate that HDAC6 is an anti-IAV host factor and exerts its anti-IAV function by negatively regulating the trafficking of viral components to the host cell plasma membrane via its substrate, acetylated microtubules. IMPORTANCE Host cells produce many proteins that have the natural ability to restrict influenza virus infection. Here, we discovered that another host protein, histone deacetylase 6 (HDAC6), inhibits influenza virus infection. We demonstrate that HDAC6 exerts its anti-influenza virus function by negatively regulating the trafficking of viral components to the site of influenza virus assembly via its substrate, acetylated microtubules. HDAC6 is a multisubstrate enzyme and regulates multiple cellular pathways, including the ones leading to various cancers, neurodegenerative diseases, and inflammatory disorders. Therefore, several drugs targeting HDAC6 are under clinical development for the treatment of a wide range of diseases. Influenza virus continues to be a major global public health problem due to regular emergence of drug-resistant and novel influenza virus strains in humans. As an alternative antiviral strategy, HDAC6 modulators could be employed to stimulate the anti-influenza virus potential of endogenous HDAC6 to inhibit influenza virus infection." @default.
• W2019948656 created "2016-06-24" @default.
• W2019948656 creator A5022168120 @default.
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• W2019948656 date "2014-10-01" @default.
• W2019948656 modified "2023-10-12" @default.
• W2019948656 title "Histone Deacetylase 6 Inhibits Influenza A Virus Release by Downregulating the Trafficking of Viral Components to the Plasma Membrane via Its Substrate, Acetylated Microtubules" @default.
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• W2019948656 doi "https://doi.org/10.1128/jvi.00727-14" @default.
• W2019948656 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4178787" @default.
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