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Dietary N-3 polyunsaturated fatty acids decrease biliary cholesterol saturation in gallstone disease.

F Berr1, J Holl, D Jüngst

  • 1Department of Medicine II, Klinikum Grosshadern, University of Munich, Germany.

Hepatology (Baltimore, Md.)
|October 1, 1992
PubMed
Summary
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Dietary n-3 polyunsaturated fatty acids altered biliary phospholipids, reducing cholesterol saturation in gallstone patients. However, this change was insufficient to prevent cholesterol crystal nucleation in bile.

Area of Science:

  • Biochemistry
  • Gastroenterology
  • Nutrition Science

Background:

  • Biliary phospholipid fatty acid composition impacts cholesterol secretion.
  • Understanding how dietary fatty acids affect bile composition is crucial for gallstone disease management.

Purpose of the Study:

  • To investigate if replacing specific fatty acids with n-3 polyunsaturated fatty acids in biliary phosphatidylcholines reduces cholesterol supersaturation and prevents cholesterol crystal precipitation in gallstone patients.
  • To assess the effect of marine fish oil supplementation on bile composition and cholesterol saturation.

Main Methods:

  • Seven gallstone patients received marine fish oil supplementation for 5 weeks.
  • Duodenal bile was collected and analyzed for phospholipid fatty acid composition and cholesterol saturation index.

Related Experiment Videos

  • Gallbladder function was assessed via cholecystokinin infusion.

    • Main Results:

    • n-3 polyunsaturated fatty acid intake significantly increased eicosapentaenoic and docosahexaenoic acids while decreasing linoleic and arachidonic acids in biliary phospholipids.
    • The molar ratio of cholesterol to phospholipids decreased by 19%.
    • Cholesterol saturation index was reduced by 25%, but bile nucleation time was not prolonged, indicating insufficient reduction to prevent crystal formation.

    Conclusions:

    • Dietary n-3 polyunsaturated fatty acids can modify the fatty acid composition of biliary phosphatidylcholines.
    • This modification leads to reduced cholesterol saturation in bile.
    • The observed reduction in cholesterol saturation, while significant, was not sufficient to prevent cholesterol crystal nucleation in the studied gallstone patients.