The relationship between apolipoprotein E and serum oxidation-related variables is apolipoprotein E phenotype dependent.
To examine the relationship between apolipoprotein E and serum oxidation status, we assayed apolipoprotein E level, apolipoprotein E phenotype, and levels of lipid peroxides and transition metal ions and their binding proteins in sera from apparently healthy individuals. The study group included 129 women aged 22-63 years and 53 men aged 22-56 years. Among subjects with apolipoprotein E 4/3 phenotype, lipid peroxide levels were higher compared with E 3/2 phenotype (786 +/- 182 nmol/l vs. 659 +/- 174 nmol/l, P = 0.015), and ceruloplasmin levels were slightly higher compared with apolipoprotein E 3/3 phenotype (0.28 +/- 0.08 mg/l vs. 0.26 +/- 0.06 mg/l, P = 0.035). In the study group as a whole, there were significant associations between serum apolipoprotein E level, and serum levels of ceruloplasmin (r = 0.266, P < 0.001) and ferritin (r = 0.2, P < 0.007). Among subjects with apolipoprotein E 4/3 phenotype, there was a significant association between serum apolipoprotein E and lipid peroxide levels (r = 0.470, P < 0.01), which was not apparent among subjects with E 3/3 or E 3/2 phenotypes. In multivariate analysis, apolipoprotein E phenotype was a small but significant independent contributor to variation in serum lipid peroxide levels. These data suggest that there may be heterogeneity among apolipoprotein E phenotypes in their relationships with serum lipid oxidation status.
Rockefeller University, New York, NY 10021-6399, USA.
J D
JD
Smith
M
M
Miyata
S E
SE
Poulin
L M
LM
Neveux
W Y
WY
Craig
D000328:Adult; D001057:Apolipoproteins E / Q000097:blood*; D005260:Female; D006801:Humans; D015227:Lipid Peroxidation; D008297:Male; D008875:Middle Aged; D010084:Oxidation-Reduction; D010641:Phenotype; D017392:Thiobarbituric Acid Reactive Substances; D014815:Vitamins / Q000008:administration & dosage
D001057:Apolipoproteins E; D017392:Thiobarbituric Acid Reactive Substances; D014815:Vitamins