Simultaneous measurement of basal pancreatic, gastric acid secretion, plasma gastrin, and secretin during smoking

Area of Science:

• Gastroenterology
• Physiology

Background:

• Peptic ulcer disease (PUD) is a common gastrointestinal disorder.
• The relationship between cigarette smoking and PUD is a significant public health concern.
• Understanding the physiological effects of smoking on gastric and pancreatic secretions is crucial for PUD research.

Purpose of the Study:

• To investigate the acute effects of smoking on basal gastric acid and pancreatic secretion.
• To compare these effects in individuals with and without a history of duodenal ulcer.
• To explore the role of nicotine, gastrin, and secretin in mediating these effects.

Main Methods:

• 10 healthy subjects and 10 with a history of duodenal ulcer smoked one unfiltered cigarette every 15 minutes for 1 hour.
• Basal gastric acid output, pancreatic fluid and bicarbonate secretion were measured.
• Plasma concentrations of nicotine, gastrin, and secretin were monitored.

Main Results:

• Smoking caused a transient increase in basal gastric acid output, more pronounced in the duodenal ulcer group.
• Fluid and bicarbonate pancreatic secretion were significantly inhibited during smoking.
• The inhibition of pancreatic secretion correlated with plasma nicotine levels, not gastrin or secretin.
• Recovery of pancreatic secretion was slower in the non-ulcer group.

Conclusions:

• Smoking acutely alters gastric acid and pancreatic secretions in a manner primarily mediated by nicotine.
• The findings suggest a physiological basis for the association between smoking and peptic ulcer disease.
• Further research is warranted to elucidate the precise mechanisms and clinical implications.