Campylobacter jejuni activates mitogen-activated protein kinases in Caco-2 cell monolayers and in vitro infected primary human colonic tissue.
The mitogen-activated protein kinases (MAPKs) play a central role in many host signalling pathways. These signalling proteins are known to be involved in host responses against invasive bacteria including generation of chemotactic and inflammatory cytokines. It was hypothesized that Campylobacter jejuni may activate MAPKs, as intestinal infection may induce a clinical and pathological picture of acute colonic inflammation. Infection of Caco-2 cell monolayers (human colonic epithelial cell line) and human colonic tissue with C. jejuni in vitro demonstrated increased MAPK activity for ERK 1/2 (p44/42 MAPK), JNK and p38 MAPKs. Kinase activity and phosphorylated forms were increased in infected Caco-2 cells and human colonic explants, suggesting that these pathways are important in inflammatory responses induced by C. jejuni in man.
MacCallum
Amanda
A
Institute of Comparative Medicine, Sir Henry Wellcome Building, University of Glasgow Faculty of Veterinary Medicine, Bearsden Road, Glasgow G61 1QH, UK.
Haddock
Graham
G
Department of Paediatric Surgery, Yorkhill Hospital, Glasgow G3 8SJ, UK.
Everest
Paul H
PH
Institute of Comparative Medicine, Sir Henry Wellcome Building, University of Glasgow Faculty of Veterinary Medicine, Bearsden Road, Glasgow G61 1QH, UK.
D018938:Caco-2 Cells / Q000382:microbiology*; D016123:Campylobacter jejuni / Q000276:immunology / Q000502:physiology*; D003106:Colon / Q000166:cytology / Q000201:enzymology* / Q000382:microbiology; D004789:Enzyme Activation; D006801:Humans; D048031:JNK Mitogen-Activated Protein Kinases / Q000378:metabolism; D048369:MAP Kinase Kinase 1 / Q000378:metabolism; D020935:MAP Kinase Signaling System / Q000276:immunology; D020928:Mitogen-Activated Protein Kinases / Q000276:immunology / Q000378:metabolism*; D048051:p38 Mitogen-Activated Protein Kinases / Q000378:metabolism
D048031:JNK Mitogen-Activated Protein Kinases; D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases; D048369:MAP Kinase Kinase 1; C482125:MAP2K1 protein, human