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Life Sciences 1994

Effects of the new histamine H2 receptor antagonist, FRG-8813, on gastric mucin in rats with or without acidified ethanol-induced gastric damage.

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T Ichikawa
K Ishihara
Y Komuro
Y Kojima
K Saigenji
K Hotta

Kata kunci

Abstrak

It is not presently well understood whether the histamine H2 receptor antagonist has a function other than the inhibition of gastric acid secretion, such as the effect on the gastric mucosal defence mechanism. In this paper, we report the effect of FRG-8813 (N-[4-[4-(piperidinylmethyl)pyridyl-2-oxy]-(Z)-2-butenyl]-2- (furfurylsulfinyl) acetamide), a new histamine H2 receptor antagonist, on the rat gastric mucin content with or without 0.15N HCl-ethanol (60 %)-induced gastric damage. The prior administration of FRG-8813 significantly inhibited the occurrence of macroscopically observable hemorrhagic lesions induced by the acidified ethanol treatment. Using a newly developed biochemical method, the mucin content of the deep corpus and antral mucosa of the acidified ethanol-treated animals was significantly reduced to 50% and 32% of the control, respectively. These reductions were inhibited by the pretreatment with FRG-8813. Total mucin content in the entire stomach recovered to about 80% of the control value after pretreatment with FRG-8813. A single oral administration of FRG-8813 (30 mg/kg) caused no significant change in the total mucin content, but mucin in the adherent mucus gel layer selectively and significantly increased to 250% of the control. These results suggest that FRG-8813 not only inhibits acid secretion but may also affect the gastric mucosal defensive mechanism as well.

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