Inhibition of gastric secretion by thyroid preparations

Abstract
Four dogs with Thomas gastric pouches and one dog with a Heidenhain pouch were stimulated to secrete gastric juice by feeding 100 gm of lean beef. Feeding whole desiccated thyroid ordinarily caused a significant fall in volume of gastric juice and in the total quantity of HCl secreted. Crystalline thyroxine yielded erratic results and one trial with triiodothyronine produced a significant increase in gastric secretion. Thyroidectomy in one dog resulted in a gradual decline in secretion, but hypothyroidism produced by administration of mercaptoimidazole in another animal lead to a significant increase in secretion.

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