Abstract
Gastrin release and gastric secretion in response to i.v. dimethylxanthine (2 mg/kg for 5 min followed by a 55-min infusion of 2.5 mg/kg) were studied in 25 normal subjects. Gastrin release was significantly stimulated, whereas gastric acid and pepsin secretion was inhibited. The adenylcyclase activation may, therefore, play a role in the mechanism of gastrin release. Moreover, dimethylxanthine seems to be a useful aid in studies on G-cell function in man.
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