High-density lipoprotein particle size and concentration and coronary risk

Area of Science:

• Cardiovascular Disease Research
• Lipid Metabolism
• Biomarker Discovery

Background:

• High-density lipoprotein (HDL) cholesterol is inversely linked to coronary artery disease (CAD) risk.
• HDL particle heterogeneity suggests differential associations with cardiovascular risk factors.

Purpose of the Study:

• To investigate the independent associations of HDL size and particle concentration with future CAD risk.
• To elucidate the relationship between HDL characteristics and cardiovascular risk.

Main Methods:

• Nested case-control study within the EPIC-Norfolk cohort (1993-2003).
• Participants included 822 men and women who developed CAD and 1401 matched controls without CAD.
• HDL particle concentration and size measured using nuclear magnetic resonance spectroscopy and gradient gel electrophoresis.

Main Results:

• Lower HDL particle concentration and HDL size observed in CAD cases compared to controls.
• HDL size associated with metabolic syndrome markers; HDL particle concentration was not.
• HDL particle concentration independently predicted CAD risk (adjusted odds ratio, 0.50).
• HDL size's association with CAD risk was explained by apolipoprotein B and triglyceride levels.

Conclusions:

• HDL particle concentration, but not HDL size, is an independent predictor of CAD risk.
• The association of HDL size with CAD risk is largely explained by metabolic syndrome markers.
• Findings highlight the distinct roles of HDL size and concentration in cardiovascular risk assessment.