Inulin attenuates atherosclerosis in apolipoprotein E-deficient mice

Area of Science:

• Nutritional Science
• Cardiovascular Research
• Gastroenterology

Background:

• Atherosclerosis is a major cause of cardiovascular disease.
• Dietary interventions, including prebiotics, are explored for cardiovascular health.
• Inulin-type fructans are known for their prebiotic effects and potential metabolic benefits.

Purpose of the Study:

• To investigate the effects of different inulin-type fructan fractions on atherosclerotic plaque formation.
• To evaluate the impact of these fructans on lipid metabolism in a mouse model.

Main Methods:

• Male apo E-deficient mice were fed diets with long-chain inulin, oligofructose, or oligofructose-enriched inulin for 16 weeks.
• Atherosclerotic plaque area was quantified using histomorphometry in the aortic sinus.
• Plasma and hepatic lipid concentrations (cholesterol and triacylglycerol) were measured.

Main Results:

• Long-chain inulin and oligofructose-enriched inulin reduced atherosclerotic lesion area by approximately 35% and 25%, respectively.
• All tested fructans significantly reduced plasma and hepatic triacylglycerol concentrations.
• Long-chain inulin and oligofructose-enriched inulin significantly lowered plasma and hepatic cholesterol concentrations.

Conclusions:

• Long-chain inulin, alone or in combination with oligofructose, demonstrates potent inhibition of atherosclerotic plaque formation.
• These effects are likely mediated through significant improvements in lipid metabolism.
• Inulin-type fructans show promise as a dietary strategy for managing atherosclerosis.