title: Infection with Campylobacter jejuni induces tyrosine-phosphorylated proteins into INT-407 cells.
abstract: The mechanisms used by Campylobacter jejuni to induce internalization into host intestinal epithelial cells have not been defined. In this study, we obtained evidence that exposure of INT-407 cells to protein kinase inhibitors results in decreased invasion of these cells by C. jejuni in a dose dependent manner. Preincubation of INT-407 cells in the presence of staurosporine, tyrphostin 46 and genistein decreased invasion of these cells by C. jejuni significantly. Moreover, C. jejuni infection of INT-407 cells induced tyrosine phosphorylation of several Triton X-100 soluble proteins with approximate molecular weights of 170, 145, 90, 60 and 55 kDa that were absent or reduced in the presence of genistein in cells after 1 hr of pretreatment. These data suggest that tyrosine protein kinase-linked pathways strongly regulate the internalization of C. jejuni into intestinal epithelial cells.
authors.affiliation: Laboratory of Veterinary Public Health, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan.
authors.forename: Debabrata
authors.initials: D
authors.lastname: Biswas
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Niwa
authors.forename: Kikuji
authors.initials: K
authors.lastname: Itoh
mesh_terms: D016123:Campylobacter jejuni / Q000472:pathogenicity*; D002478:Cells, Cultured; D004791:Enzyme Inhibitors / Q000494:pharmacology; D019833:Genistein / Q000494:pharmacology; D006801:Humans; D007422:Intestines / Q000166:cytology / Q000382:microbiology*; D010766:Phosphorylation; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism*; D011506:Proteins / Q000378:metabolism*; D019311:Staurosporine / Q000494:pharmacology; D014443:Tyrosine / Q000378:metabolism*; D020032:Tyrphostins / Q000494:pharmacology
chemical_list: D004791:Enzyme Inhibitors; D011506:Proteins; D020032:Tyrphostins; C086599:tyrphostin A46; D014443:Tyrosine; D019833:Genistein; D011505:Protein-Tyrosine Kinases; D019311:Staurosporine