Abstract
The feeding related endogenous sugar acids, 2-deoxytetronic acid, 2-DTA and 3-deoxypentonic acid, 3-DPA, were investigated for their peripheral and central (hypothalamic) control of gastric acid secretion, and effects on activity of lateral hypothalamic (LHA) neurons in rats. Peripheral gastric acid secretion was not affected by either 2-DTA or 3-DPA. Slight gastric acid secretion was elicited by 3-DPA only when it was applied directly into the gastric related site of the LHA. Gastric acid secretion induced by 2-deoxy-D-glucose (2DG) was suppressed by application of 2-DTA in the LHA. 3-DPA had no effect on 2DG induced secretion. Electrophoretic application of 2-DTA significantly inhibited the activity of both gastric and non-gastric type glucose-sensitive neurons in the LHA, and 3-DPA significantly excited both types of glucose-sensitive neurons. The results agree with previous reports that 2-DTA and 3-DPA are endogenous satiety and hunger factors, respectively, and act by modulating hypothalamic control of gastric acid secretion which is mediated through gastric type and non-gastric type glucose-sensitive neurons.
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