Shigella Effector IpaB-Induced Cholesterol Relocation Disrupts the Golgi Complex and Recycling Network to Inhibit Host Cell Secretion

Shigella infection causes destruction of the human colonic epithelial barrier. The Golgi network and recycling endosomes are essential for maintaining epithelial barrier function. Here we show that Shigella epithelial invasion induces fragmentation of the Golgi complex with consequent inhibition of...

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Published inCell host & microbe Vol. 12; no. 3; pp. 381 - 389
Main Authors Mounier, Joëlle, Boncompain, Gaëlle, Senerovic, Lidija, Lagache, Thibault, Chrétien, Fabrice, Perez, Franck, Kolbe, Michael, Olivo-Marin, Jean-Christophe, Sansonetti, Philippe J., Sauvonnet, Nathalie
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 13.09.2012
Subjects
Bacterial Proteins - metabolism
Cell Line
Cholesterol - metabolism
Endosomes - metabolism
Endosomes - ultrastructure
Golgi Apparatus - metabolism
Golgi Apparatus - ultrastructure
Host-Pathogen Interactions
Humans
Microscopy, Fluorescence
Proteins - secretion
Shigella - pathogenicity
Virulence Factors - metabolism
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Summary:Shigella infection causes destruction of the human colonic epithelial barrier. The Golgi network and recycling endosomes are essential for maintaining epithelial barrier function. Here we show that Shigella epithelial invasion induces fragmentation of the Golgi complex with consequent inhibition of both secretion and retrograde transport in the infected host cell. Shigella induces tubulation of the Rab11-positive compartment, thereby affecting cell surface receptor recycling. The molecular process underlying the observed damage to the Golgi complex and receptor recycling is a massive redistribution of plasma membrane cholesterol to the sites of Shigella entry. IpaB, a virulence factor of Shigella that is known to bind cholesterol, is necessary and sufficient to induce Golgi fragmentation and reorganization of the recycling compartment. Shigella infection-induced Golgi disorganization was also observed in vivo, suggesting that this mechanism affecting the sorting of cell surface molecules likely contributes to host epithelial barrier disruption associated with Shigella pathogenesis. ► Shigella inhibits cell surface receptor recycling ► Shigella disrupts the Golgi network and its secretory function ► Cholesterol delocalization by Shigella entry underlies Golgi disruption ► The cholesterol-binding Shigella effector IpaB disrupts the Golgi network
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ISSN:1931-3128
1934-6069
DOI:10.1016/j.chom.2012.07.010