4.3 Article

Apolipoprotein E (APOE) polymorphism influences serum APOE levels in Alzheimer's disease patients and centenarians

Journal

NEUROREPORT
Volume 14, Issue 4, Pages 605-608

Publisher

LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00001756-200303240-00016

Keywords

Alzheimer's disease; apolipoprotein E genotype; centenarians; longevity; serum apolipoprotein E

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Vascular factors may play a role in the etiology of Alzheimer's disease (AD) and increased serum apolipoprotein E (APOE) levels in AD could be of interest, as APOE concentration is associated with vascular disease. Aims of this study were to evaluate the influence of APOE genotype on serum APOE levels, and, secondly, to study serum APOE concentrations in relation to age and AD. APOE genotypes, serum total cholesterol, LDL cholesterol, HDL cholesterol, total cholesterol/HDL cholesterol ratio, triglycerides, and serum APOE were performed on 52 healthy centenarians, 49 AD patients, 45 age-matched controls, and 72 young healthy adults. In all study population a significant trend in reduction of serum APOE levels from APOE epsilon2- to epsilon4 carriers was observed. The difference in serum APOE levels among age groups significantly decreased in epsilon4 carriers only, including HDL cholesterol; no significant differences between AD patients and age-matched controls were found. In these highly selected populations, APOE genotype distribution strongly influences serum APOE concentration, not suggesting, at present, a possible role as a biochemical marker for AD, but only as a putative longevity factor.

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