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Related Experiment Videos

Why does somatostatin cause gallstones?

S A Ahrendt1, G E McGuire, H A Pitt

  • 1Department of Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland.

American Journal of Surgery
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

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Octreotide alters bile composition and causes gallbladder stasis, increasing concentrations of calcium, bilirubin, protein, and lipids. This raises the likelihood of gallstone formation.

Area of Science:

  • Gastroenterology
  • Pharmacology
  • Bile Acid Metabolism

Background:

  • Long-term octreotide use is linked to gallstone formation.
  • Octreotide, a somatostatin analogue, affects bile secretion and gallbladder emptying.
  • The impact of octreotide on gallbladder bile composition is not well understood.

Purpose of the Study:

  • To investigate octreotide's effect on hepatic and gallbladder bile composition.
  • To determine if octreotide causes gallbladder stasis.
  • To assess the impact of octreotide on bile solute concentrations.

Main Methods:

  • Prairie dogs received octreotide or saline for 5 days.
  • Cholecystectomy and bile duct cannulation were performed.
  • Hepatic and gallbladder bile composition and pH were analyzed.

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Main Results:

  • Octreotide increased hepatic bile concentrations of bilirubin and protein.
  • Octreotide decreased an index of gallbladder stasis (Rsa).
  • Octreotide increased gallbladder bile concentrations of calcium, bilirubin, protein, lipids, and hydrogen ions, while decreasing bile pH.

Conclusions:

  • Octreotide alters hepatic bile composition and induces gallbladder stasis in prairie dogs.
  • Octreotide increases concentrations of key solutes in gallbladder bile.
  • These changes likely increase the risk of cholesterol and calcium bilirubinate precipitation, contributing to gallstone formation.