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Comparative Study
Journal Article
A possible role of GLP-1 in the pathophysiology of early dumping syndrome.
Digestive Diseases and Sciences 2005 December
Exaggerated plasma concentrations of GLP-1 precede reactive hypoglycemia after oral glucose in gastrectomy patients, resulting in late dumping syndrome. Recently, we showed that GLP-1 elicits the activation of sympathetic outflow. Because sympathetic activation is thought to be a cause of early dumping, we hypothesized that exaggerated GLP-1 may contribute to the pathophysiology of early dumping syndrome. In 11 patients after gastrectomy and 14 controls, blood pressure, heart rate, and plasma concentrations of norepinephrine, epinephrine, GLP-1, glucagon, insulin, and glucose were measured after oral glucose. In gastrectomy patients, GLP-1, norepinephrine, and heart rate peaked 15 to 30 min after oral glucose. Significant positive correlations were found among GLP-1, norepinephrine, and heart rate at 30 min, and these parameters at 30 min were significantly higher in patients with early dumping syndrome. These results suggest that GLP-1 is involved in the pathophysiology of early dumping syndrome.
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