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Updated: Aug 11, 2026

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Published on: March 22, 2024
Cyclic adenosine monophosphate and human gastric acid secretion
This study investigated cyclic AMP (adenosine 3',5'-monophosphate) levels during gastric acid stimulation. Findings suggest cyclic AMP is not a primary mediator of human gastric acid secretion, though betazole stimulation increased its output.
Area of Science:
- Gastroenterology
- Molecular Biology
- Biochemistry
Background:
- Cyclic adenosine monophosphate (cAMP) is a key intracellular second messenger.
- Its role in regulating gastric acid secretion in humans is not fully elucidated.
- Gastric acid secretion can be stimulated by agents like betazole and pentagastrin.
Purpose of the Study:
- To investigate the levels of cAMP in gastric juice, plasma, and urine.
- To determine the relationship between cAMP and gastric acid secretion stimulated by betazole and pentagastrin.
- To assess the potential role of cAMP as a mediator in human gastric acid secretion.
Main Methods:
- Measurement of cAMP concentrations using radioimmunoassay.
- Analysis of gastric juice, plasma, and urine samples from 27 subjects.
- Stimulation of gastric acid secretion using betazole and pentagastrin.
Main Results:
- No significant increase in cAMP concentration was observed in gastric juice, plasma, or urine after betazole or pentagastrin stimulation.
- Betazole stimulation was associated with a statistically significant increase in cAMP output into gastric juice (P < 0.05).
- Pentagastrin stimulation did not alter cAMP output, despite achieving similar peak acid output as betazole.
Conclusions:
- The lack of increased cAMP concentration supports the hypothesis that cAMP is not a primary mediator of gastric acid secretion induced by betazole or pentagastrin in humans.
- The physiological significance of increased cAMP output into gastric juice following betazole stimulation requires further investigation.
- These findings contribute to understanding the complex mechanisms of gastric acid regulation.
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