Related Experiment Videos
Duodenal acid is without importance for the postprandial PP release
Scandinavian Journal of Gastroenterology
|August 1, 1982
Summary
Duodenal acidification may slightly increase pancreatic polypeptide (PP) release. However, gastric acid secretion is not important for meal-induced PP release in healthy individuals or those with achlorhydria.
Area of Science:
- Gastroenterology
- Endocrinology
- Physiology
Background:
- Pancreatic polypeptide (PP) is a hormone released from endocrine cells in the pancreas.
- Its release is stimulated by food intake, but the precise mechanisms, particularly the role of gastric acid, are not fully understood.
Purpose of the Study:
- To investigate the role of duodenal acidification and gastric acid secretion in the release of plasma pancreatic polypeptide (PP).
- To determine if gastric acid inhibition affects postprandial PP release.
- To compare meal-induced PP release in patients with achlorhydria versus healthy controls.
Main Methods:
- Duodenal infusion of hydrochloric acid (HCl) and bile in healthy subjects.
- Administration of the H2-receptor antagonist ranitidine to inhibit gastric acid secretion.
- Measurement of plasma PP levels before and after stimuli.
- Comparison of meal-induced PP release in achlorhydric patients and normal controls.
Main Results:
- Duodenal infusion of HCl caused a slight but significant increase in plasma PP.
- Bile infusion did not affect basal plasma PP levels.
- Ranitidine did not alter postprandial PP release.
- Meal-induced PP release was similar in achlorhydric patients and healthy controls.
Conclusions:
- Duodenal acidification can stimulate pancreatic polypeptide (PP) release.
- Gastric acid secretion plays a minimal role in postprandial PP release.
- The findings suggest that factors other than gastric acid are primarily responsible for meal-stimulated PP release.