Stimulation of inflammatory mediators secretion by chemotactic peptides in rat colitis model
Acta gastroenterol. latinoam
;
26(1): 23-30, 1996. ilus, tab, graf
Article
in English
| LILACS
| ID: lil-186443
ABSTRACT
Colonic inflammation was produced in rats by chemotactic peptides acting on polymorphonuclear leucocytes. Instillation during one hour of formylated tripeptide formylmethionyl-leucy-phenylalanine (FMLP) and a tetrapeptide alanine-glycine-sefine-glutamine (AGSG) into rat colon caused erosions and exulcerations. Neutrophils increased secondary to instillation, predominantly with FMLP, and mucus depletion was marked in the cecum. Chloride ion secretion and mucosal permeability were significatively greater in the colonic lumen with the chemotactic peptides. Histamine and serotonin concentration were greater in the colonic fluid in animals treated with the peptides. These observations could suggest that the presence of chemotactic peptides at the colonic lumen produce changes at the mucosal wall, that would participate in generation and perpetuation of the colonic inflammation.
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Index:
LILACS (Americas)
Main subject:
Chlorides
/
Colitis
/
Inflammation Mediators
/
Intestinal Mucosa
/
Mucins
/
N-Formylmethionine Leucyl-Phenylalanine
Limits:
Animals
Language:
English
Journal:
Acta gastroenterol. latinoam
Journal subject:
Gastroenterology
Year:
1996
Type:
Article
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