Fluctuation of the mucosal hydroxyproline content in compound 48/80-induced gastric lesions in rats.

Extensive gastric mucosal lesions were observed after i.p. administration of compound 48/80 (0.75 mg/kg) for 3 days to rats. The mucosal hydroxyproline content was significantly increased at 4 h after the last injection of compound 48/80 and subsequently decreased as the lesions were healed. Treatment with cimetidine (50 mg/kg, i.p.) did not prevent compound 48/80-induced gastric lesions. The increase in the mucosal hydroxyproline content was significantly reduced by treatment with cimetidine. This fact suggested that cimetidine might have an inhibitory effect on the regeneration of connective tissue.