Alterations in gastric acid secretion following hepatic vagotomy at a stage of development in rats.
The relation of gastric acid secretion to the hepatic vagal section was examined in consideration of developmental stages of a rat. Acid outputs in rats deprived of food for 22 hr before the experiment were estimated with or without insulin. The animals were classified into five groups according to their body weights at the experiments (50, 100, 200, 300 and 400 g). Hepatic vagotomy was effective in decreasing acid output in all of the groups treated with food deprivation and insulin, and it was found that there was a close relationship between the output and glucose concentration in the portal blood. In rats treated only with food deprivation, hepatic vagotomy produced different effects for the five groups; the vagotomy failed to cause acid response when the rats weighed about 300 and 400 g, while in the animals weighing about 50, 100 and 200 g acid outputs were reduced following the vagotomy. It was noted that the sensitivity to hypoglycemia in the acid output was greater in the young rats than the older ones. Results suggest that function of the hepatic vagal nerve may be prominent in modulating acid secretion in an earlier stage of development when the animals are most sensitive to hypoglycemia.
Ohtake
M
M
Department of Surgery, Niigata University School of Medicine, Japan.
Sakaguchi
T
T
D000375:Aging / Q000378:metabolism*; D000818:Animals; D001786:Blood Glucose / Q000378:metabolism; D001835:Body Weight; D005508:Food Deprivation; D005744:Gastric Acid / Q000378:metabolism*; D007328:Insulin / Q000494:pharmacology; D008099:Liver / Q000254:growth & development / Q000294:innervation* / Q000378:metabolism; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D014628:Vagotomy; D014630:Vagus Nerve / Q000254:growth & development / Q000502:physiology*
D001786:Blood Glucose; D007328:Insulin