Related Experiment Videos
Small, dense, low-density lipoprotein and atherosclerosis
1Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA. www.berkeleyheartlab.com.
Insights
Abnormal patterns in low-density lipoprotein (LDL) and high-density lipoprotein (HDL) subclasses are key drivers of coronary artery disease (CAD). Standard lipid tests often miss these crucial subclass variations, impacting patient care.
Area of Science:
- Cardiovascular Medicine
- Clinical Chemistry
- Biochemistry
Background:
- Low-density lipoprotein (LDL) and high-density lipoprotein (HDL) subclass distribution disorders are significant contributors to coronary artery disease (CAD).
- Elevated low-density lipoprotein cholesterol (LDLC) alone is less indicative of CAD risk than subclass abnormalities.
- Current routine blood tests may not identify all metabolic contributors to CAD.
Purpose of the Study:
- To highlight the clinical significance of LDL and HDL subclass distribution in patient management.
- To emphasize the need for standardized laboratory methods for subclass analysis.
- To underscore the limitations of conventional lipid profiles in detecting CAD risk factors.
Main Methods:
- Laboratory determination of LDL and HDL subclass distribution using analytic ultracentrifugation or polyacrylamide gradient gel electrophoresis.
- Review of recent research emphasizing the role of subclass distribution in CAD.
- Analysis of findings from electron beam computed tomography in asymptomatic individuals.
Main Results:
- Disorders in LDL and HDL subclass distribution are more prevalent contributors to CAD than elevated LDLC.
- A significant proportion of individuals with established CAD have normal lipid levels according to National Cholesterol Education Program (NCEP) criteria.
- Subclass analysis is crucial for identifying metabolic abnormalities not detected by routine lipid tests.
Conclusions:
- LDL and HDL subclass distribution is a critical factor in CAD pathogenesis and patient management.
- Standardized quality control and research standards are essential for reliable subclass testing.
- Further research and clinical application of subclass analysis are necessary for comprehensive CAD risk assessment.
Abstract:
Disorders of low-density lipoprotein (LDL) and high- density lipoprotein (HDL) subclass distribution are more common contributors to coronary artery disease (CAD) than is elevated low-density lipoprotein cholesterol (LDLC). Recent research has emphasized the importance of LDL and HDL subclass distribution in patient management and response to treatments. Laboratory determination of LDL and HDL subclass distribution involves analytic ultracentrifugation or polyacrylalmide gradient gel electrophoresis. If subclass distribution is to be used for patient management, research quality control and standards are necessary in order to assure that the patient's values accurately reflect the metabolic disorder. The importance of this topic for patient care has been recognized by the medical insurance industry. Investigations employing electron beam computed tomography in asymptomatic individuals has revealed that 50% with established CAD have normal lipids by National Cholesterol Education Program (NCEP) criteria. However, a large proportion of other metabolic contributors to CAD are not revealed by routine blood tests.