Inflammation, remodeling, and other factors affecting HDL cholesterol efflux

Area of Science:

• Cardiovascular Science
• Lipid Metabolism
• Molecular Biology

Background:

• High-density lipoprotein (HDL) cholesterol efflux capacity (CEC) is a cardiovascular risk predictor, independent of HDL cholesterol levels.
• The molecular determinants governing HDL CEC remain largely uncharacterized.
• HDL is a heterogeneous particle population with diverse compositions influencing CEC.

Purpose of the Study:

• To review recent findings connecting HDL composition and CEC.
• To elucidate the molecular determinants of HDL CEC.
• To explore the impact of inflammation on HDL function and CEC.

Main Methods:

• Review of recent animal and human studies.
• Analysis of factors associated with HDL composition and CEC.
• Discussion of inflammatory effects on HDL remodeling and CEC pathways.

Main Results:

• Multiple factors, including proteins, lipid composition, and HDL subpopulations, are associated with CEC.
• Inflammation significantly remodels HDL, impairing overall CEC but potentially enhancing specific pathways like ATP-binding cassette transporter G1-mediated efflux.
• Chronic inflammation exerts subtler effects on HDL CEC compared to acute inflammation.

Conclusions:

• Understanding the factors controlling HDL CEC is crucial for developing novel therapeutic interventions.
• Standardization of assays for HDL composition and CEC is essential for progress.
• Elucidating the molecular basis of HDL CEC may lead to improved strategies for managing cardiovascular risk.