Kallikrein–kinin system in inflammatory bowel diseases: Intestinal involvement and correlation with the degree of tissue inflammation

Tissue kallikrein and its natural inhibitor, kallistatin, play opposite roles in the generation of bradykinin, a potent mediator of inflammation. Observations on experimental models and humans with ulcerative colitis suggest a pathogenetic role of the kallikrein–kinin system in inflammatory bowel di...

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Veröffentlicht in:Digestive and liver disease 2005-09, Vol.37 (9), p.665-673
Hauptverfasser: Devani, M., Vecchi, M., Ferrero, S., Avesani, E. Contessini, Arizzi, C., Chao, L., Colman, R.W., Cugno, M.
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container_end_page 673
container_issue 9
container_start_page 665
container_title Digestive and liver disease
container_volume 37
creator Devani, M.
Vecchi, M.
Ferrero, S.
Avesani, E. Contessini
Arizzi, C.
Chao, L.
Colman, R.W.
Cugno, M.
description Tissue kallikrein and its natural inhibitor, kallistatin, play opposite roles in the generation of bradykinin, a potent mediator of inflammation. Observations on experimental models and humans with ulcerative colitis suggest a pathogenetic role of the kallikrein–kinin system in inflammatory bowel diseases. To evaluate tissue kallikrein and kallistatin in intestinal tissue samples from Crohn's disease and ulcerative colitis patients with different degrees of disease involvement. Full-thickness surgical intestinal samples were obtained from 144 subjects (38 normal controls, 32 inflammatory controls, 38 Crohn's disease, 36 ulcerative colitis) and tested for kallikrein and kallistatin by immunoperoxidase techniques. Compared with controls, kallikrein immunoreactivity was significantly weaker in goblet cells ( p = 0.0001) and significantly stronger in interstitium ( p = 0.0001) of the Crohn's disease and ulcerative colitis samples. Kallistatin colocalised with kallikrein, with almost no reactivity in goblet cells but strong reactivity in interstitium of inflammatory bowel disease patients ( p = 0.0001 versus controls). The kallikrein and kallistatin depletion of goblet cells and the increased interstitial kallikrein and kallistatin reactivity correlated with the degree of tissue inflammation ( p = 0.0001). Disease-free samples had normal kallikrein and kallistatin patterns. Kallikrein–kinin system is actively involved in inflammatory bowel disease as a result of the release of kallikrein in the intestinal extracellular space; this involvement correlates with the degree of tissue inflammation. The normal pattern observed in the disease-free samples seems to rule out a genetic defect of kallikrein and kallistatin in inflammatory bowel diseases.
doi_str_mv 10.1016/j.dld.2005.01.021
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subjects Adult
Aged
Aged, 80 and over
Carrier Proteins - analysis
Colon - chemistry
Colon - pathology
Crohn's disease
Female
Humans
Immunohistochemistry
Inflammatory Bowel Diseases - pathology
Inflammatory Bowel Diseases - physiopathology
Intestinal tissue kallikrein
Kallikrein-Kinin System
Kallikreins - analysis
Kallistatin
Male
Middle Aged
Serpins - analysis
Ulcerative colitis
title Kallikrein–kinin system in inflammatory bowel diseases: Intestinal involvement and correlation with the degree of tissue inflammation
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