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PI5P Triggers ICAM-1 Degradation in Shigella Infected Cells, Thus Dampening Immune Cell Recruitment
INSERM U1048, I2MC and Universite´ Paul Sabatier, 31432 Toulouse, France.
Umeå University, Faculty of Medicine, Molecular Infection Medicine Sweden (MIMS). Umeå University, Faculty of Medicine, Umeå Centre for Microbial Research (UCMR). Umeå University, Faculty of Medicine, Department of Molecular Biology (Faculty of Medicine). INSERM U1202, Unite´ de Pathogénie Microbienne Moléculaire, Institut Pasteur, 75724 Paris Cedex 15, France. (Andrea Puhar)ORCID iD: 0000-0002-9915-002X
INSERM U1048, I2MC and Universite´ Paul Sabatier, 31432 Toulouse, France.
INSERM U1048, I2MC and Universite´ Paul Sabatier, 31432 Toulouse, France.
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2016 (English)In: Cell reports, ISSN 2211-1247, E-ISSN 2211-1247, Vol. 14, no 4, 750-759 p.Article in journal (Refereed) Published
Abstract [en]

Shigella flexneri, the pathogen responsible for bacillary dysentery, has evolved multiple strategies to control the inflammatory response. Here, we show that Shigella subverts the subcellular trafficking of the intercellular adhesion molecule-1 (ICAM-1), a key molecule in immune cell recruitment, in a mechanism dependent on the injected bacterial enzyme IpgD and its product, the lipid mediator PI5P. Overexpression of IpgD, but not a phosphatase dead mutant, induced the internalization and the degradation of ICAM-1 in intestinal epithelial cells. Remarkably, addition of permeant PI5P reproduced IpgD effects and led to the inhibition of neutrophil recruitment. Finally, these results were confirmed in an in vivo model of Shigella infection where IpgD-dependent ICAM-1 internalization reduced neutrophil adhesion. In conclusion, we describe here an immune evasion mechanism used by the pathogen Shigella to divert the host cell trafficking machinery in order to reduce immune cell recruitment.

Place, publisher, year, edition, pages
Cell Press , 2016. Vol. 14, no 4, 750-759 p.
National Category
Cell Biology
Research subject
Infectious Diseases
Identifiers
URN: urn:nbn:se:umu:diva-115891DOI: 10.1016/j.celrep.2015.12.079OAI: oai:DiVA.org:umu-115891DiVA: diva2:900958
Available from: 2016-02-05 Created: 2016-02-05 Last updated: 2017-11-30Bibliographically approved

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Molecular Infection Medicine Sweden (MIMS)Umeå Centre for Microbial Research (UCMR)Department of Molecular Biology (Faculty of Medicine)
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