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© Research
Publication : Nature immunology

Nod1 responds to peptidoglycan delivered by the Helicobacter pylori cag pathogenicity island

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature immunology - 17 Oct 2004

Viala J, Chaput C, Boneca IG, Cardona A, Girardin SE, Moran AP, Athman R, Mémet S, Huerre MR, Coyle AJ, DiStefano PS, Sansonetti PJ, Labigne A, Bertin J, Philpott DJ, Ferrero RL

Link to Pubmed [PMID] – 15489856

Nat. Immunol. 2004 Nov;5(11):1166-74

Epithelial cells can respond to conserved bacterial products that are internalized after either bacterial invasion or liposome treatment of cells. We report here that the noninvasive Gram-negative pathogen Helicobacter pylori was recognized by epithelial cells via Nod1, an intracellular pathogen-recognition molecule with specificity for Gram-negative peptidoglycan. Nod1 detection of H. pylori depended on the delivery of peptidoglycan to host cells by a bacterial type IV secretion system, encoded by the H. pylori cag pathogenicity island. Consistent with involvement of Nod1 in host defense, Nod1-deficient mice were more susceptible to infection by cag pathogenicity island-positive H. pylori than were wild-type mice. We propose that sensing of H. pylori by Nod1 represents a model for host recognition of noninvasive pathogens.

http://www.ncbi.nlm.nih.gov/pubmed/15489856