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Summary
Intravenous arginine infusion is a weak stimulus for gastrin release in humans. While some individuals showed a rise in serum gastrin, the overall response was less consistent and smaller than previously reported.
Area of Science:
- Gastroenterology
- Endocrinology
- Human Physiology
Background:
- Arginine infusion has been previously suggested as a potent stimulator of endogenous gastrin release.
- Gastrin plays a crucial role in regulating gastric acid secretion and gastrointestinal motility.
Purpose of the Study:
- To re-examine the effect of intravenous arginine infusion on serum gastrin levels in healthy human subjects.
- To compare the observed gastrin response with previous findings.
Main Methods:
- 12 healthy human subjects received intravenous arginine infusion.
- Serum gastrin levels were measured before, during, and after arginine infusion.
- Statistical analysis was performed to assess significant changes in gastrin levels.
Main Results:
- 6 out of 12 subjects exhibited a serum gastrin rise of 40% or more, with responses occurring at varied times.
- Overall mean serum gastrin levels showed only a small increase, with a statistically significant rise (p < 0.05) observed only during the infusion period.
- The gastrin response to arginine infusion in this study was less pronounced and less consistent compared to prior reports.
Conclusions:
- Intravenous arginine infusion appears to be a less potent stimulus for gastrin release than previously suggested.
- Individual variability in gastrin response to arginine exists.
- Further research may be needed to elucidate the mechanisms underlying gastrin regulation by amino acids.