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2016 ; 5
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A systematic view on influenza induced host shutoff
#MMPMID27525483
Bercovich-Kinori A
; Tai J
; Gelbart IA
; Shitrit A
; Ben-Moshe S
; Drori Y
; Itzkovitz S
; Mandelboim M
; Stern-Ginossar N
Elife
2016[Aug]; 5
(ä): ä PMID27525483
show ga
Host shutoff is a common strategy used by viruses to repress cellular mRNA
translation and concomitantly allow the efficient translation of viral mRNAs.
Here we use RNA-sequencing and ribosome profiling to explore the mechanisms that
are being utilized by the Influenza A virus (IAV) to induce host shutoff. We show
that viral transcripts are not preferentially translated and instead the decline
in cellular protein synthesis is mediated by viral takeover on the mRNA pool. Our
measurements also uncover strong variability in the levels of cellular
transcripts reduction, revealing that short transcripts are less affected by IAV.
Interestingly, these mRNAs that are refractory to IAV infection are enriched in
cell maintenance processes such as oxidative phosphorylation. Furthermore, we
show that the continuous oxidative phosphorylation activity is important for
viral propagation. Our results advance our understanding of IAV-induced shutoff,
and suggest a mechanism that facilitates the translation of genes with important
housekeeping functions.
|*Gene Expression Regulation
[MESH]
|*Host-Pathogen Interactions
[MESH]
|*Protein Biosynthesis
[MESH]
|*Transcription, Genetic
[MESH]
|Cell Line
[MESH]
|Epithelial Cells/physiology/virology
[MESH]
|Humans
[MESH]
|Influenza A virus/genetics/growth & development/*physiology
[MESH]