Increased gastric acid secretion after massive small bowel resection is related to a decrease in enterogastrones

Area of Science:

• Gastroenterology
• Endocrinology
• Surgical Physiology

Background:

• The impact of small bowel resection on gastric secretion is debated.
• Understanding these effects is crucial for managing post-surgical patients.

Purpose of the Study:

• To investigate the influence of proximal and distal small bowel resection on gastric acid secretion.
• To examine hormonal changes, including gastrin, secretin, and neurotensin, following small bowel resection.

Main Methods:

• Studied basal and pentagastrin-stimulated gastric acid secretion in 12 dogs before and after 60% small bowel resection.
• Assessed serum levels of gastrin, secretin, and neurotensin.
• Utilized rat bioassays to detect potential circulating secretagogues.

Main Results:

• Proximal small bowel resection significantly increased basal and low-dose pentagastrin-stimulated gastric acid secretion.
• Distal small bowel resection did not alter gastric secretion.
• Proximal resection reduced serum secretin levels but did not affect gastrin or neurotensin.
• No circulating secretagogues were identified post-resection.

Conclusions:

• Proximal, but not distal, small bowel resection enhances gastric acid secretion.
• The observed increase in gastric secretion after proximal resection may be attributed to decreased circulating secretin levels.