title: Effects of pectin-induced passive linkage of gastric H+ on the gastric acid secretion on the development of ethanol- and salicylate-induced gastric mucosal lesions in rats.
abstract: The aim of this study was to evaluate the effects of intragastrically given pectin-induced physicochemical properties and actions on active gastric acid secretion and on the development of ethanol- and aspirin-induced gastric mucosal lesions. The observations were carried out on CFY-strain rats, fasted for 24 h before the experiments with water ad libitum. The observations were carried out in two experimental series. A) The gastric mucosal lesions were produced by intragastrically given 96% ethanol or aspirin prepared with 0.2 M HCl. Different doses of pectin (100, 50 and 25 mg x kg(-1), respectively) were administered intragastrically 30 min before giving necrotizing agents. The number of gastric lesions was noted 1 h after the administration, while the severity of gastric mucosal lesions was scored by semi-quantitative scale. B) The effects of pectin were studied on the volume and H+ secretion of the stomach in 4-h pylorus-ligated rats. It has been found that: 1) the gastric mucosal lesions could be produced in 100% of rats by the application of both necrotizing agents. 2) Pectin in doses of 50-100 mg x kg(-1) increased the number of gastric mucosal lesions in both models, while no increase was produced by the application of 25-mg x kg(-1) dose. 3) The severity of mucosal lesions increased significantly after the administration of all doses of pectin. 4) The pectin-induced increase of gastric lesions (number) showed a dose-response effect. 5) The pectin produced a significant increase in the volume of gastric secretion and gastric H+ secretion. It has been concluded that: a) pectin-induced physicochemical changes are able to enhance the aggression to gastric mucosa produced by ethanol and aspirin; b) a positive correlation exists between the linkage of H+ to pectin and significant active metabolic response in the rat stomach; c) pectin alone stimulates the active metabolic process of the gastric H+ secretion.
authors.affiliation: First Department of Medicine, University Medical School of Pécs, Hungary.
authors.forename: M
authors.initials: M
authors.lastname: Figler
authors.forename: I
authors.initials: I
authors.lastname: Szabó
authors.forename: G
authors.initials: G
authors.lastname: Mózsik
mesh_terms: D000818:Animals; D001241:Aspirin / Q000008:administration & dosage; D004305:Dose-Response Relationship, Drug; D000431:Ethanol; D005744:Gastric Acid / Q000378:metabolism*; D005753:Gastric Mucosa / Q000187:drug effects / Q000378:metabolism* / Q000473:pathology; D006851:Hydrochloric Acid; D006859:Hydrogen / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D010368:Pectins / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D013272:Stomach Diseases / Q000139:chemically induced / Q000473:pathology
chemical_list: D000431:Ethanol; D006859:Hydrogen; D010368:Pectins; D006851:Hydrochloric Acid; D001241:Aspirin