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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 FASEB+J 2003 ; 17 (6): 758-60 Nephropedia Template TP
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Influenza A virus replication is dependent on an antioxidant pathway that involves GSH and Bcl-2 #MMPMID12594179
FASEB J 2003[Apr]; 17 (6): 758-60 PMID12594179show ga
Growing evidence indicates that viral replication is regulated by the redox state of the host cell. We demonstrate that cells of different origins display differential permissivity for influenza A virus replication, depending on their intracellular redox power as reflected by Bcl-2 expression and glutathione (GSH) content. Bcl-2 expressing cells were found to have higher intracellular levels of GSH and to produce lower amounts of virus than Bcl-2 negative cells. Two different steps in the virus life-cycle were involved in Bcl-2/GSH mediated viral inhibition: 1) expression of late viral proteins (in particular hemagglutinin and matrix); and 2) nuclear-cytoplasmic translocation of viral ribonucleoproteins (vRNPs). Buthionine-sulfoximine-induced inhibition of GSH synthesis in Bcl-2 expressing cells caused an increase in the expression of late viral proteins but did not restore vRNP export to the cytoplasm. Collectively, our findings show that both Bcl-2 expression and GSH content contribute to the host cell's ability to down-regulate influenza virus replication, although their effects are exerted at different stages of the viral life-cycle. In certain cell populations, this form of down-regulation might conceivably favor the establishment of persistent viral infection.