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Updated: May 5, 2026
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Cholesterol Efflux Assay
Published on: March 6, 2012
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Common genetic variation in ABCA1 is associated with altered lipoprotein levels and a modified risk for coronary
S M Clee1, A H Zwinderman, J C Engert
1Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, Canada.
Circulation
|March 10, 2001
Summary
Common variations in the ATP-binding cassette transporter 1 (ABCA1) gene impact high-density lipoprotein cholesterol (HDL-C) levels and coronary artery disease (CAD) risk. The R219K variant is linked to slower atherosclerosis progression and reduced CAD severity.
Area of Science:
- Genetics and Cardiovascular Disease
- Molecular Biology and Lipid Metabolism
Background:
- Low high-density lipoprotein cholesterol (HDL-C) is a known risk factor for coronary artery disease (CAD).
- The ATP-binding cassette transporter 1 (ABCA1) gene is crucial for cholesterol efflux and HDL production.
- Genetic variations in ABCA1 are linked to HDL deficiency, dyslipidemia, and increased CAD risk.
Purpose of the Study:
- To investigate the influence of common genetic variations within the ABCA1 gene on plasma lipid levels.
- To determine the association between ABCA1 gene polymorphisms and the severity of coronary artery disease (CAD) in the general population.
Main Methods:
- Analysis of phenotypic effects of single nucleotide polymorphisms (SNPs) in the coding region of the ABCA1 gene.
- Examining the carrier frequency of the R219K variant in European populations.
- Assessing the impact of the R219K variant on CAD severity, atherosclerosis progression, plasma lipid levels, and coronary events.
Main Results:
- The R219K variant, with a 46% carrier frequency in Europeans, was associated with reduced CAD severity and slower atherosclerosis progression.
- Carriers of R219K showed decreased focal and diffuse atherosclerosis and fewer coronary events compared to non-carriers.
- R219K carriers exhibited decreased triglyceride levels and a trend towards increased HDL-C levels.
Conclusions:
- Common variations in the ABCA1 gene significantly influence plasma lipid profiles.
- Genetic variation in ABCA1 plays a substantial role in determining the severity of coronary artery disease (CAD).
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