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Genetic and environmental influences on LDL subclass phenotypes

M A Austin1

  • 1Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle 98195.

Clinical Genetics
|July 1, 1994
PubMed
Summary

Small, dense low-density lipoprotein (LDL) subclass phenotype B is linked to higher coronary heart disease (CHD) risk. Lifestyle and genetics influence this phenotype, offering targets for intervention.

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Area of Science:

  • Cardiovascular Science
  • Lipid Metabolism
  • Genetics

Background:

  • Accumulating evidence suggests low-density lipoprotein (LDL) subclasses play a role in atherosclerosis.
  • A predominance of small, dense LDL (LDL subclass phenotype B) is associated with increased coronary heart disease (CHD) risk.

Purpose of the Study:

  • To review the evidence linking LDL subclasses to CHD risk.
  • To explore the genetic and environmental factors influencing LDL subclass phenotypes.
  • To identify potential intervention strategies for genetically susceptible individuals.

Main Methods:

  • Review of case-control, family, genetic linkage, and twin studies.
  • Analysis of associations between LDL subclass phenotype B and atherogenic lipoprotein profiles.

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  • Examination of the influence of genetic and non-genetic factors on LDL subclass expression.

    • Main Results:

    • LDL subclass phenotype B is consistently associated with increased CHD risk.
    • Phenotype B is characterized by an atherogenic lipoprotein profile: increased triglycerides and decreased high-density lipoprotein cholesterol.
    • LDL subclasses are influenced by major gene effects and non-genetic factors like medications, diet, and exercise.

    Conclusions:

    • The interplay of genetic predisposition and environmental factors in LDL subclass expression offers opportunities for targeted CHD risk reduction.
    • Understanding these influences can lead to personalized intervention strategies for individuals at genetic risk.