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Cellular Microbiology
Article . 2016 . Peer-reviewed
License: Wiley TDM
Data sources: Crossref
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http://dx.doi.org/10.1111/cmi....
Article . 2016 . Peer-reviewed
Data sources: SNSF P3 Database
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Shigella flexnerimodulates stress granule composition and inhibits stress granule aggregation

Erratum
Authors: Vonaesch Pascale; Campbell-Valois François-Xavier; Dufour Alexandre; Sansonetti Philippe J; Schnupf Pamela;

Shigella flexnerimodulates stress granule composition and inhibits stress granule aggregation

Abstract

Invasion and multiplication of the facultative, cytosolic, enteropathogen Shigella flexneri within the colonic epithelial lining leads to an acute inflammatory response, fever and diarrhea. During the inflammatory process, infected cells are subjected to numerous stresses including heat, oxidative stress and genotoxic stress. The evolutionarily conserved pathway of cellular stress management is the formation of stress granules that store translationally inactive cellular mRNAs and interfere with cellular signalling pathways by sequestering signalling components. In this study, we investigated the ability of S. flexneri-infected cells to form stress granules in response to exogenous stresses. We found that S. flexneri infection inhibits movement of the stress granule markers eIF3 and eIF4B into stress granules and prevents the aggregation of G3BP1 and eIF4G-containing stress granules. This inhibition occurred only with invasive, but not with non-invasive bacteria and occurred in response to stresses that induce translational arrest through the phosphorylation of eIF2α and by treating cells with pateamine A, a drug that induces stress granules by inhibiting the eIF4A helicase. The S. flexneri-mediated stress granule inhibition could be largely phenocopied by the microtubule-destabilizing drug nocodazole and while S. flexneri infection did not lead to microtubule depolymerization, infection greatly enhanced acetylation of alpha-tubulin. Our data suggest that qualitative differences in the microtubule network or subversion of the microtubule-transport machinery by S. flexneri may be involved in preventing the full execution of this cellular stress response.

Related Organizations
Keywords

Eukaryotic Initiation Factor-3, Eukaryotic Initiation Factor-2, DNA Helicases, Golgi Apparatus, Cytoplasmic Granules, Microtubules, Actins, RNA Recognition Motif Proteins, Host-Pathogen Interactions, Mutation, Epoxy Compounds, Humans, Macrolides, Eukaryotic Initiation Factors, Phosphorylation, Carrier Proteins, Poly-ADP-Ribose Binding Proteins, RNA Helicases, Dysentery, Bacillary, HeLa Cells

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    12
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
12
Top 10%
Average
Average
gold