High-throughput LC-MS method to investigate postprandial lipemia: considerations for future precision nutrition...

Area of Science:

• Metabolic Research
• Nutritional Science
• Cardiovascular Disease Risk Factors

Background:

• Elevated postprandial lipemia is a significant risk factor for cardiovascular disease.
• Current methods for quantifying postmeal lipid handling in humans are limited.
• Understanding dietary lipid metabolism is crucial for personalized health strategies.

Purpose of the Study:

• To test a novel stable isotope tracer method for tracking dietary lipid appearance in humans.
• To quantify postprandial lipid handling following meals with varying fat content.
• To assess the utility of this method for precision nutrition and clinical research.

Main Methods:

• A stable isotope tracer (2H11-oleate) was incorporated into liquid meals with low, moderate, and high fat content.
• 12 healthy men consumed these meals in a randomized crossover design.
• Blood samples were collected over 8 hours, and triglyceride-rich lipoproteins were isolated and analyzed using ultracentrifugation and LC-MS.

Main Results:

• The novel stable isotope tracer method successfully quantified dietary lipid appearance and turnover.
• Plasma triglyceride concentrations and lipid particle dynamics varied significantly with meal fat content.
• TG 54:3 and singly labeled molecules showed higher plasma absolute entry rates, supporting the method's sensitivity.

Conclusions:

• The developed stable isotope labeling method is effective for investigating human postprandial lipemia.
• This technique can be applied to precision nutrition studies to characterize individual responses to dietary fats.
• The method offers a valuable tool for basic science research and clinical drug development in metabolic health.