Postprandial lipemia associates with liver fat content

Area of Science:

• Metabolic research
• Cardiovascular disease research

Background:

• Postprandial lipemia and low adiponectin are emerging risk factors for vascular disease.
• Liver fat accumulation is increasingly recognized as a contributor to metabolic dysfunction.

Purpose of the Study:

• To investigate if liver fat content and adiponectin levels predict postprandial triglyceride-rich lipoprotein (TRL) responses.
• To assess the relationship between liver fat, adiponectin, and markers of postprandial lipid metabolism.

Main Methods:

• Twenty-nine men were categorized into low (<5%) or high (>5%) liver fat groups using magnetic resonance proton spectroscopy.
• Participants underwent an oral fat tolerance test, euglycemic hyperinsulinemic clamp, and abdominal fat imaging, with postprandial TRL measurements (TG, cholesterol, apoB-48, apoB-100).

Main Results:

• High liver fat was associated with increased postprandial lipid responses in plasma, chylomicron, and very-low-density lipoprotein 1 (VLDL1) fractions.
• Liver fat positively correlated with postprandial TG, cholesterol, apoB-48, and apoB-100 responses in VLDL1.
• Fasting adiponectin levels showed an inverse correlation with postprandial lipids and liver fat content.

Conclusions:

• Liver fat content is a strong predictor of postprandial TRL responses, outperforming glucose metabolism and body adiposity measures.
• Low adiponectin is closely associated with high liver fat and impaired TRL metabolism.
• Elevated liver fat and associated postprandial lipemia are potential cardiovascular disease risk factors.