Effect of tunicamycin on the development of the cytopathic effect in Sindbis virus-infected avian fibroblasts - PubMed (original) (raw)
Effect of tunicamycin on the development of the cytopathic effect in Sindbis virus-infected avian fibroblasts
E T Ulug et al. Virology. 1985 Jun.
Abstract
In Sindbis virus-infected avian cells the development of the cytopathic effect is correlated with the disruption of plasma membrane function. Sindbis virus inhibits the activity of the Na+K+ATPase, a membrane-associated enzyme complex which regulates intracellular monovalent cation levels. Tunicamycin, which blocks envelope protein glycosylation, prevents inhibition of Na+K+ATPase activity and the development of morphological changes in Sindbis virus-infected cells. Although inhibition of Na+K+ATPase activity is not essential for the termination of host protein synthesis, membrane-mediated events may favor the selective translation of viral proteins. The termination of host protein synthesis does not contribute to the development of these cytopathic changes in the time frame examined. In tunicamycin-treated, Sindbis virus-infected cells, unglycosylated E1 is inserted into the plasma membrane but virus release is prevented. In productively infected cells, therefore, the inhibition of Na+K+ATPase activity and the development of the cytopathic effect may result from terminal events in virus assembly and/or virus release.
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