Antral gastrin concentration in upper-gastrointestinal disease

Area of Science:

• Gastroenterology
• Endocrinology
• Oncology

Background:

• Antral gastrin concentration (AGC) plays a crucial role in regulating gastric acid secretion.
• Abnormalities in gastrin levels are associated with various gastrointestinal disorders.
• Understanding AGC variations can aid in diagnosing and managing conditions like peptic ulcers and Zollinger-Ellison syndrome.

Purpose of the Study:

• To investigate the relationship between antral gastrin concentration (AGC) and different gastrointestinal diagnoses.
• To compare AGC levels in patients with various conditions to a control group with normal endoscopic findings.
• To explore the correlation between AGC and gastrin output or acid secretion.

Main Methods:

• Collected prepyloric mucosal specimens via forceps biopsy during endoscopy from 174 patients.
• Measured Antral Gastrin Concentration (AGC) in ng gastrin/mg tissue.
• Analyzed AGC in relation to diagnoses including duodenal ulcer, gastric ulcers, Zollinger-Ellison syndrome, gastritis, esophagitis, and gastric atrophy. Correlated AGC with meal-stimulated gastrin output and histalog-stimulated acid output in subgroups.

Main Results:

• Mean AGC in controls was 14.2 ng/mg. AGC was similar in duodenal and gastric ulcers but significantly lower in body/fundus ulcers and Zollinger-Ellison syndrome (4.9 ng/mg).
• AGC was significantly higher in gastritis (25.8 ng/mg), esophagitis (23.2 ng/mg), and gastric atrophy with hypergastrinemia (44.6 ng/mg).
• AGC positively correlated with gastrin output (r=0.47) and inversely with maximum acid output (r=-0.20).

Conclusions:

• Antral gastrin concentration (AGC) shows distinct patterns in various gastrointestinal diseases.
• Elevated AGC is associated with conditions like gastritis and esophagitis, while reduced AGC is observed in specific ulcer types and Zollinger-Ellison syndrome.
• AGC is a potential biomarker reflecting underlying pathophysiological changes in the stomach.