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Nephrology Dialysis Transplantation, Vol 12, Issue 1 141-144, Copyright © 1997 by Oxford University Press

ORIGINAL ARTICLES

Influence of variation at the apolipoprotein E locus on lipid and lipoprotein levels in CAPD patients

G Eggertsen, O Heimburger, P Stenvinkel and L Berglund
Division of Clinical Chemistry, Department of Medical Laboratory Sciences and Technology, and Department of Nephrology, Karolinska Institute, Huddinge University Hospital, Sweden; Corresponding author at: Division of Preventive Medicine and Nutrition, Department of Medicine, College of Physicians and Surgeons of Columbia University, 630 West 168th Street, New York, NY 10032, USA

Background. Variation at the apolipoprotein E (apo E) locus influence lipid and lipoprotein levels in the normal population, and is associated with premature coronary artery disease. Patients with end-stage kidney disease or undergoing dialysis treatment are particularly prone to develop accelerated atherosclerosis. Methods. To evaluate the influence of genetic variation at the apo E locus, apo E genotypes and serum lipid and lipoprotein levels were measured in 51 subjects undergoing continuous ambulatory peritoneal dialysis (CAPD). Results. The distribution of apo E phenotypes and apo E allelic frequency among the CAPD subjects (&egr;2 0.049; &egr;3 0.745; &egr;4 0.206) corresponded to the healthy Swedish population. In the CAPD subjects, total serum and LDL cholesterol levels were high (6.7±1.5 mmol/l and 4.2±1.3 mmol/l respectively) and HDL cholesterol levels were low (1.2±0.5 mmol/l). When directly comparing the two major apo E groups, E 3/3 subjects (n=30) and E4/3 and 4/4 subjects, &egr;4-carriers, (n=16), LDL cholesterol levels were significantly higher among &egr;4-carriers (4,8±1.1 vs 4.0±1.2 mmol/l, P<0.03), but total serum cholesterol levels was not higher among the &egr;4-carriers (7.3±1.3 vs 6.5±1.5 mmol/l, P<0.08). Serum triglycerides or HDL cholesterol levels did not differ significantly between &agr;3-homozygotes and &egr;4-carriers. Conclusions. The results demonstrate a strong effect of variation of the apo E locus on LDL cholesterol levels in CAPD subjects, suggesting that &egr;4-carriers may be more susceptible to accelerated development of atherosclerosis in this condition. Keywords: atherosclerosis; apolipoprotein E; kidney disease; LDL cholesterol; peritoneal dialysis
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