effect of serotonin on basal gastric acid secretion in pylorus ligated rats of different age groups

ABSTRACT

The effect of serotonin on gastric acid secretion and its acidity have been examined by using four hour pylorus ligated rats of different age groups. Serotonin alone decreased the volume of gastric secretion and, free and total acidity in both younger and older animals, while methylsergide alone increased these parameters. Each of these drugs produced a significantly higher response in older animals. Methylsergide when given with serotonin abolished the inhibitory effect of serotonin and the observed secretions were similar to those of basal state. This indicates that serotonin as gastric inhibitor acts in accordance with parietal cell mass which increases with age