Gastric cytoprotective anti-ulcerogenic actions of hydroxychalcones in rats.

Abstract:

:The preventive effects of hydroxychalcone derivatives on ulcer formation induced by severe necrotizing agents such as 60% ethanol in 150 mM HCl (HCl-ethanol) and 0.2 N NaOH in rats were examined. Among the compounds tested, 2',4'-dihydroxychalcone gave the strongest activity in both experimental models and protected the gastric mucosa from the insult of either necrotizing agent at oral doses ranging from 1 to 10 mg/kg, as evidenced by a dose-related reduction in the ulcer index. The mucosal protective activity of 2',4'-dihydroxychalcone was not affected by pretreatment with indomethacin (5 mg/kg, s.c.). To investigate the detailed mechanism of the mucosal protective action of 2',4'-dihydroxychalcone, its inhibitory effects on the decrease in the hexosamine content from the gastric mucus induced by HCl-ethanol were studied by using it in combination with a dye, Alcian blue. As a result, 2',4'-dihydroxychalcone at an oral dose of 10 mg/kg inhibited the decrease in the dye-recovery from the gastric mucus induced by HCl-ethanol. PGE2 at an oral dose of 0.1 mg/kg exhibited a similar action. These results established that 2',4'-dihydroxychalcone is a potent cytoprotective agent similar to PGE2 effectively preventing gastric ulcer formation induced by strong necrotizing agents and seems to suggest that this compound protects the stomach against its own peptic secretions by reinforcement of gastric resistances. In fact, 2',4'-dihydroxychalcone prevented ulcer formation induced by water-immersion stress in rats and also showed a marked enhancement of the healing of acetic acid-induced gastric ulcers in rats.

journal_name

Planta Med

journal_title

Planta medica

authors

Yamamoto K,Kakegawa H,Ueda H,Matsumoto H,Sudo T,Miki T,Satoh T

doi

10.1055/s-2006-961498

subject

Has Abstract

pub_date

1992-10-01 00:00:00

pages

389-93

issue

5

eissn

0032-0943

issn

1439-0221

journal_volume

58

pub_type

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