CD36 Modulates Fasting and Preabsorptive Hormone and Bile Acid Levels

Area of Science:

• Metabolic disease research
• Human genetics
• Nutritional science

Background:

• Abnormal fatty acid (FA) metabolism is linked to diabetes and cardiovascular disease.
• The FA receptor CD36 is associated with metabolic syndrome risk.
• CD36's role in human fat metabolism is not well understood.

Purpose of the Study:

• To investigate the impact of a specific CD36 gene variant (rs3211938 G/T) on postprandial hormone and bile acid (BA) responses.
• To determine if reduced CD36 levels, due to the minor G allele, affect hormonal regulation after a high-fat meal (HFM).

Main Methods:

• Studied obese African American women with the CD36 variant (G allele carriers) and without (noncarriers).
• Measured plasma hormones, bile acids, and serum lipoproteins before and after a HFM.
• Assessed early preabsorptive and extended postprandial responses.

Main Results:

• G-allele carriers showed reduced fasting cholesterol and specific bile acids.
• Fasting GLP-1 and pancreatic polypeptide levels were significantly lower in carriers.
• Post-meal, carriers exhibited blunted insulin, C-peptide, and incretin responses.
• Bile acid profiles and FGF19 responses differed between carriers and noncarriers.

Conclusions:

• CD36 plays a critical role in preabsorptive hormonal and bile acid regulation.
• These responses are key to coordinating brain and gut functions in energy metabolism.
• The CD36 variant influences key metabolic pathways, potentially impacting disease risk.