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Journal Article
Research Support, Non-U.S. Gov't
Increased hydroxymethylglutaryl coenzyme A reductase activity during respiratory syncytial virus infection mediates actin dependent inter-cellular virus transmission.
Antiviral Research 2013 October
We have examined the role that hydroxymethylglutaryl coenzyme A reductase (HMGCR) plays during respiratory syncytial virus (RSV) maturation. Imaging analysis indicated that virus-induced changes in F-actin structure correlated with the formation of virus filaments, and that these virus filaments played a direct role in virus cell-to-cell transmission. Treatment with cytochalasin D (CYD) prevented virus filament formation and virus transmission, but this could be reversed by removal of CYD. This observation, together with the presence of F-actin within the virus filaments suggested that newly polymerised F-actin was required for virus transmission. The virus-induced change in F-actin was inhibited by the HMGCR inhibitor lovastatin, and this correlated with the inhibition of both virus filament formation and the incorporation of F-actin in these virus structures. Furthermore, this inhibitory effect on virus filament formation correlated with a significant reduction in RSV transmission. Collectively these data suggested that HMGCR-mediated changes in F-actin structure play an important role in the inter-cellular transmission of mature RSV particles. These data also highlighted the interplay between cellular metabolism and RSV transmission, and demonstrate that this interaction can be targeted using anti-virus strategies.
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