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Related Experiment Videos

Apolipoprotein E polymorphism and insulin levels in a biethnic population

R Valdez1, B V Howard, M P Stern

  • 1Division of Clinical Epidemiology, University of Texas Health Science Center at San Antonio 78284-7873, USA.

Diabetes Care
|July 1, 1995
PubMed
Summary

Apolipoprotein E (apoE) 3/2 phenotype is linked to lower cholesterol and improved insulin sensitivity, suggesting a broader metabolic role beyond lipid levels in cardiovascular risk.

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Area of Science:

  • Genetics and Cardiovascular Health
  • Metabolic Syndrome Research
  • Human Physiology

Background:

  • Apolipoprotein E (apoE) plays a crucial role in lipid metabolism.
  • Understanding apoE polymorphism's impact on cardiovascular risk factors is essential.
  • Previous studies primarily focused on cholesterol levels.

Purpose of the Study:

  • To investigate the association between apolipoprotein E (apoE) phenotypes and cardiovascular risk factors beyond cholesterol.
  • To examine the relationship with insulinemia and insulin resistance.

Main Methods:

  • Study included 320 nondiabetic Mexican-Americans and non-Hispanic whites.
  • Analyzed three major apoE phenotypes: apoE 3/2, apoE 3/3, and apoE 4/3.
  • Assessed indicators of insulin resistance: fasting insulin, glucose, and lipid levels.

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Main Results:

  • Frequencies of apoE phenotypes varied between ethnic groups but associations were consistent.
  • The apoE 3/2 phenotype showed lower total and LDL cholesterol levels.
  • Individuals with apoE 3/2 also exhibited lower fasting and 2-hour postload insulin levels.

Conclusions:

  • Apolipoprotein E (apoE) variability is associated with a wider range of metabolic factors.
  • These factors are linked to insulin resistance, extending beyond cholesterol levels.
  • The apoE locus influences metabolic health relevant to cardiovascular disease.