Abstract
Cinchophen injected into the cerebral ventricle reacted with the hypothalamus somewhere in the vicinity ventricle, and produced a release of ACTH as indicated by a rise in peripheral plasma 11-OHCS concentration in the dog. The amount of cinchophen injected into the ventricle corresponds to about 1/600 of the dose required to produce the same effect by the intravenous route. Repeated intraventricular injections of cinchophen were effective in producing gastric erosions and ulcers at smaller doses than the intravenous one (1/100 and 1/400). Damage to the gastric wall might be due to a mechanism involving a localized portion of the hypothalamus and/or via a cerebral ventricle. Bilateral truncal vagotomy did not have any effect on chronic ulcer production. The cinchophen ulcerations were accompanied by an increase in plasma corticosteroids. The new experimental technique for producing peptic ulcer in dogs via a central neurohumoral mechanism is described.
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