title: Insights into Campylobacter jejuni colonization of the mammalian intestinal tract using a novel mouse model of infection.
abstract: A lack of relevant disease models for Campylobacter jejuni has long been an obstacle to research into this common enteric pathogen. We recently published that mice deficient in Single IgG Interleukin-1 related receptor (SIGIRR), a repressor of MyD88-dependent innate immune signaling, were highly susceptible to enteric infection by murine bacterial pathogens. Subsequently, we successfully employed these mice as an animal model for the human pathogen C. jejuni and gained substantial new insights into infection by this pathogen. The infected mice developed significant intestinal inflammation, primarily via TLR4 stimulation. Furthermore, the resulting gastroenteritis was dependent on C. jejuni pathogenesis as bacterial strains suffering mutations in key virulence factors were attenuated in causing disease. The ability to infect SIGIRR-deficient mice with C. jejuni sheds new light onto how these bacteria colonize the mucus layer of the intestinal tract, invade epithelial cells, and raises new prospects for studying the virulence strategies and pathogenesis of C. jejuni.
authors.affiliation: a Division of Gastroenterology ; BC's Children's Hospital; The Child and Family Research Institute and The University of British Columbia ; Vancouver , BC Canada.
authors.forename: Martin
authors.initials: M
authors.lastname: Stahl
authors.forename: Bruce A
authors.initials: BA
authors.lastname: Vallance
mesh_terms: D000818:Animals; D002169:Campylobacter Infections / Q000382:microbiology* / Q000473:pathology*; D016123:Campylobacter jejuni / Q000254:growth & development*; D004195:Disease Models, Animal; D005759:Gastroenteritis / Q000382:microbiology / Q000473:pathology; D041981:Gastrointestinal Tract / Q000382:microbiology* / Q000473:pathology*; D051379:Mice; D018345:Mice, Knockout; D017472:Receptors, Interleukin-1 / Q000172:deficiency
chemical_list: D017472:Receptors, Interleukin-1; C484529:SIGIRR protein, mouse
keywords: Campylobacter jejuni; SIGIRR; gastroenteritis; innate immunity; mouse model; toll-like receptors
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