title: Protective effect of teprenone against acute gastric mucosal lesions induced by compound 48/80, a mast cell degranulator, in rats.
abstract: The protective effect of teprenone, an anti-ulcer drug, against acute gastric mucosal lesions was examined in rats with a single intraperitoneal injection of compound 48/80 (0.75 mg/kg). Teprenone (50, 100, or 200 mg/kg) was orally administered 0.5 h before compound 48/80 treatment. Administered teprenone prevented gastric mucosal lesion development found at 3 h after compound 48/80 treatment dose-dependently, although no dose of teprenone affected the decreased gastric mucosal blood flow and increased serum serotonin and histamine concentrations found at 3 h after the treatment. Increases in the activities of myeloperoxdiase (an index of neutrophil infiltration) and xanthine oxidase and the content of thiobarbituric acid reactive substances (an index of lipid peroxidation) and decreases in the contents of hexosamine (a marker of gastric mucus) and adherent mucus occurred in gastric mucosal tissues at 3 h after compound 48/80 treatment. Administered teprenone dose-dependently attenuated all these changes found at 3 h after compound 48/80 treatment. These results indicate that orally administered teprenone protects against compound 48/80-induced acute gastric mucosal lesions in rats possibly through its stimulatory action on gastric mucus synthesis and secretion and its inhibitory action on neutrophil infiltration and enhanced lipid peroxidation in the gastric mucosal tissue.
authors.affiliation: Department of Chemistry, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan. yohta@fujita-hu.ac.jp
authors.forename: Yoshiji
authors.initials: Y
authors.lastname: Ohta
authors.forename: Takashi
authors.initials: T
authors.lastname: Kobayashi
authors.forename: Kazuo
authors.initials: K
authors.lastname: Inui
authors.forename: Junji
authors.initials: J
authors.lastname: Yoshino
authors.forename: Saburo
authors.initials: S
authors.lastname: Nakazawa
mesh_terms: D000208:Acute Disease; D000818:Animals; D015550:Cell Degranulation / Q000187:drug effects / Q000502:physiology; D004224:Diterpenes / Q000494:pharmacology / Q000627:therapeutic use*; D004305:Dose-Response Relationship, Drug; D005753:Gastric Mucosa / Q000098:blood supply / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D008407:Mast Cells / Q000187:drug effects* / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D013276:Stomach Ulcer / Q000139:chemically induced / Q000378:metabolism / Q000517:prevention & control*; D003189:p-Methoxy-N-methylphenethylamine / Q000633:toxicity*
chemical_list: D004224:Diterpenes; D003189:p-Methoxy-N-methylphenethylamine; C031049:geranylgeranylacetone