Selective COX-2 inhibitor delays experimental gastric ulcer healing by stimulating gastric acid secretion in rats.
- Author:
Mei-rong HE
1
;
Jin-qiu LIN
;
Yu-gang SONG
Author Information
- Publication Type:Journal Article
- MeSH: Animals; Celecoxib; Cyclooxygenase 2 Inhibitors; pharmacology; therapeutic use; Gastric Acid; secretion; Gene Expression Regulation, Enzymologic; drug effects; H(+)-K(+)-Exchanging ATPase; genetics; metabolism; Hydrogen-Ion Concentration; Male; Microvilli; drug effects; pathology; Parietal Cells, Gastric; drug effects; ultrastructure; Pyrazoles; pharmacology; therapeutic use; RNA, Messenger; genetics; metabolism; Rats; Rats, Wistar; Stomach Ulcer; drug therapy; metabolism; pathology; Sulfonamides; pharmacology; therapeutic use
- From: Journal of Southern Medical University 2007;27(7):1015-1017
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo observe the effect of selective cyclooxygenase-2 (COX-2) inhibitor on the healing of experimental gastric ulcer in rats and explore its mechanisms in light of gastric acid secretion.
METHODSGastric ulcers were induced in rats by an application of acetic acid to the serosal surface of the anterior gastric body. The effects of selective COX-2 inhibitor, celecoxib, on the healing of gastric ulcer, the total acidity of gastric juice, the expressions of H+, K+-ATPase mRNA and protein, and the ultrastructure of the parietal cell were observed in comparison with the effects of normal saline.
RESULTSNine days after ulcer induction, the ulcer area was 11.9-/+3.1 mm square and 19.7-/+3.8 mm square in rats with normal saline and celecoxib treatments, respectively (P<0.01). The total acidity of gastric juice and the expressions of H+, K+-ATPase mRNA and protein in celecoxib group were significantly higher than that in normal saline group at both 6 and 9 days after ulcer induction, but no significant difference was found between the two groups in the amount of secretary canaliculus and microvillus.
CONCLUSIONSelective COX-2 inhibitor can significantly delay the healing of experimental gastric ulcer in rats, the mechanism of which might be associated with enhanced digestive action of gastric acid on the new granulation tissue at the ulcer base as a result of celecoxib-stimulated gastric acid secretion of the parietal cells.
