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Apolipoprotein E and atherosclerosis in Alaska Natives
W D Scheer1, D A Boudreau, G T Malcom
1Department of Pathology, Louisiana State University Medical School, New Orleans 70112, USA.
Atherosclerosis
|April 24, 1995
Summary
Apolipoprotein E (apo E) genotype influences atherosclerosis extent in Alaska Natives' coronary arteries. The E2 allele may reduce lesions, while E4 may increase them, linked to serum cholesterol levels.
Area of Science:
- Genetics
- Cardiovascular Disease
- Population Health
Background:
- Apolipoprotein E (apo E) is crucial for lipid metabolism.
- Genetic variations in apo E influence cardiovascular disease risk.
- Alaska Natives represent a unique population for genetic studies.
Purpose of the Study:
- To investigate the association between apo E genotypes and atherosclerosis in Alaska Natives.
- To determine if apo E genotype affects lipid profiles in this population.
Main Methods:
- Forensic necropsy specimens (arterial, liver, serum) from 130 Alaska Natives were analyzed.
- Apolipoprotein E (apo E) genotypes were determined.
- Extent of coronary artery lesions and serum lipid levels (total cholesterol, HDL-C, LDL + VLDL-C) were quantified and analyzed by genotype.
Main Results:
- Significant differences in coronary artery lesion extent were observed among apo E genotypes.
- The E2 allele was associated with fewer lesions, and the E4 allele with more lesions, relative to E3 homozygotes.
- These differences became non-significant after adjusting for LDL + VLDL-C, though a pattern persisted suggesting E2 lowers and E4 raises cholesterol.
Conclusions:
- Apo E genotype appears to influence coronary artery atherosclerosis extent in Alaska Natives.
- This effect is likely mediated through apo E's known role in regulating serum lipids, particularly LDL + VLDL-C.
- Further research into apo E's impact on cardiovascular health in indigenous populations is warranted.