Spontaneous release of stable viral double-stranded RNA into the extracellular medium by influenza virus-infected MDCK epithelial cells: implications for the viral acute phase response

Spontaneous release of stable viral double-stranded RNA into the extracellular medium by... The viral factor responsible for triggering the acute phase response, or ‘flu’ syndrome, associated with many acute viral infections is not defined. One candidate viral factor is double-stranded RNA (dsRNA) generated during viral replication. In this report we demonstrate by reverse-transcriptase polymerase-chain reaction that nuclease-stable viral RNA was released from influenza-infected MDCK epithelial cells at the time of cell lysis. Removal of virion-associated RNA by ultracentrifugation left equal amounts of positive-and negative-strand viral RNA in the medium that resisted degradation by endogenous RNase in the medium and by exogenous RNase added prior to phenol extraction. These data are the first demonstration that viral RNA with characteristics of dsRNA is spontaneously released from dying influenza virus-infected cells, and thus is available to amplify cytokine induction and contribute to systemic disease. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Spontaneous release of stable viral double-stranded RNA into the extracellular medium by influenza virus-infected MDCK epithelial cells: implications for the viral acute phase response

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Publisher
Springer Journals
Copyright
Copyright © Wien by 1998 Springer-Verlag/
Subject
Legacy
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s007050050467
Publisher site
See Article on Publisher Site

Abstract

The viral factor responsible for triggering the acute phase response, or ‘flu’ syndrome, associated with many acute viral infections is not defined. One candidate viral factor is double-stranded RNA (dsRNA) generated during viral replication. In this report we demonstrate by reverse-transcriptase polymerase-chain reaction that nuclease-stable viral RNA was released from influenza-infected MDCK epithelial cells at the time of cell lysis. Removal of virion-associated RNA by ultracentrifugation left equal amounts of positive-and negative-strand viral RNA in the medium that resisted degradation by endogenous RNase in the medium and by exogenous RNase added prior to phenol extraction. These data are the first demonstration that viral RNA with characteristics of dsRNA is spontaneously released from dying influenza virus-infected cells, and thus is available to amplify cytokine induction and contribute to systemic disease.

Journal

Archives of VirologySpringer Journals

Published: Dec 1, 1998

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