Characterization and response to exercise training of HDL-specific phospholipid efflux

Area of Science:

• Cardiovascular Health
• Biomarker Research
• Exercise Physiology

Background:

• HDL-specific phospholipid efflux (HDL-SPE) is a novel cell-free assay measuring HDL function.
• HDL-SPE is inversely associated with coronary artery disease (CAD).
• The impact of exercise training on HDL-SPE remains largely unknown.

Purpose of the Study:

• To investigate the effect of endurance exercise training on HDL-SPE.
• To examine HDL-SPE in a large, diverse cohort without overt disease.

Main Methods:

• 508 participants from the HERITAGE Family Study underwent 20 weeks of endurance exercise.
• Clinical and functional HDL measures, including HDL-SPE, were assessed pre- and post-training.
• Pearson correlations and paired t-tests analyzed associations and training effects.

Main Results:

• Mean HDL-SPE was higher in females and White participants.
• Baseline HDL-SPE strongly correlated with HDL-C and apoA-I.
• HDL-SPE increased post-training, particularly in those with lowest baseline levels, and changes correlated with HDL-C, apoA-I, and HDL size.

Conclusions:

• Regular exercise training enhances HDL-SPE.
• Improvements in HDL-SPE are linked to changes in HDL size and subclass concentrations.
• Individuals at higher risk for CAD may gain the most benefit from exercise regarding this HDL function biomarker.