Impact of cigarette smoking cessation on high-density lipoprotein functionality

Area of Science:

• Cardiovascular Disease Research
• Lipid Metabolism and Function

Background:

• Smoking cessation is crucial for reducing cardiovascular disease (CVD) risk and improving public health outcomes.
• The impact of smoking cessation on high-density lipoprotein (HDL) functionality remains an area of investigation.

Purpose of the Study:

• To investigate the effects of smoking cessation on HDL functionality, including cholesterol efflux capacity and anti-inflammatory properties.

Main Methods:

• A randomized trial (VN-SEESAW Study) involving 32 smokers treated with varenicline or a nicotine patch for 12 weeks.
• Measurements included plasma lipid profiles, HDL malondialdehyde (MDA) levels, HDL subfractions, cholesterol efflux capacity, and HDL's anti-inflammatory activity before and after intervention.

Main Results:

• Smoking cessation significantly improved cholesterol efflux capacity and the HDL inflammatory index (HII).
• These functional improvements were more pronounced in successful quitters compared to unsuccessful ones.
• Changes in cholesterol efflux capacity and HII correlated with reductions in end-expiratory CO and HDL MDA levels, respectively.

Conclusions:

• Smoking cessation enhances HDL functionality by increasing cholesterol efflux capacity and decreasing HII, independent of changes in HDL-C or apoA-I levels.
• Improved HDL functionality may represent a significant mechanism through which smoking cessation mitigates cardiovascular disease risk.