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Related Experiment Videos

Changes in acid secretion over the years. A 30-year longitudinal study

G Trey1, I N Marks, J A Louw

  • 1Gastrointestinal Clinic, Groote Schuur Hospital, University of Cape Town, South Africa.

Journal of Clinical Gastroenterology
|December 31, 1997
PubMed
Summary

Aging significantly reduces gastric acid secretion. This longitudinal study in physicians found decreased basal and maximum acid output over 30 years, linked to atrophic gastritis and H. pylori infection.

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Area of Science:

  • Gastroenterology
  • Aging Research
  • Physiology

Background:

  • Gastric acid secretion is crucial for digestion and nutrient absorption.
  • Changes in gastric acid output with aging are not fully understood.
  • Helicobacter pylori infection is a common cause of gastritis.

Purpose of the Study:

  • To investigate the long-term effects of aging on gastric acid secretion.
  • To correlate changes in acid output with histological findings and H. pylori status.

Main Methods:

  • Longitudinal study of 11 physicians with repeated augmented histamine tests over 30 years.
  • Upper gastrointestinal endoscopy and biopsies for histological analysis.
  • Assessment of Helicobacter pylori infection status.

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Main Results:

  • Mean basal acid output decreased significantly from 7.3 to 1.9 mEq/hr (p < 0.001).
  • Mean maximum acid output decreased significantly from 29.9 to 20.3 mEq/hr (p < 0.01).
  • Pronounced decreases in acid output were associated with atrophic gastritis and/or H. pylori infection.

Conclusions:

  • Aging is associated with a significant decline in gastric acid secretion.
  • Atrophic gastritis and H. pylori infection may contribute to age-related reductions in acid output.
  • These findings have implications for understanding age-related digestive changes.