Send to

Choose Destination
Virology. 2008 May 10;374(2):399-410. doi: 10.1016/j.virol.2008.01.022. Epub 2008 Feb 12.

Attenuation of the type I interferon response in cells infected with human rhinovirus.

Author information

Department of Microbiology, Molecular Biology and Biochemistry, University of Idaho, Moscow, Idaho 83844-3052, USA.


The type I interferon (IFN) response requires the coordinated activation of the latent transcription factors NF-kappaB, IRF-3 and ATF-2 which in turn activate transcription from the IFN-beta promoter. Here we have examined the type I interferon response in rhinovirus type 14-infected A549 cells, with particular emphasis on the status of the transcription factor IRF-3. Our results indicate that although rhinovirus type 14 (RV14) infection induces the activation of NF-kappaB and ATF-2, only very low levels of IFN-beta mRNA are detected. Analysis of ISG54 mRNA levels revealed very little induction of this IRF-3 responsive transcript and suggested that IRF-3 activation might be impaired. Examination of IRF-3 in RV14-infected cells demonstrated only low levels of phosphorylation, a lack of homodimer formation and an absence of nuclear accumulation indicating that this transcription factor is not activated. Inhibition of viral protein synthesis following infection resulted in an increase in IFN-beta mRNA levels indicating that viral gene products prevent induction of this pathway. Collectively, these results indicate that RV14 infection inhibits the host type I interferon response by interfering with IRF-3 activation.

[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center