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Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology
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Apolipoprotein E gene in physiological and pathological aging.

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PubMed
Summary
This summary is machine-generated.

The apolipoprotein E (APOE) ε4 allele is strongly linked to Alzheimer's disease (AD) risk. However, APOE genotype does not appear to significantly influence longevity in centenarians.

Keywords:
Alzheimer’s diseaseApolipoprotein ECentenariansLongevity

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Area of Science:

  • Genetics
  • Neuroscience
  • Gerontology

Background:

  • Genetic factors influence human longevity.
  • The apolipoprotein E (APOE) gene, with its variants (ε2, ε3, ε4), is crucial in aging.
  • APOE ε4 is a known risk factor for Alzheimer's disease (AD).

Purpose of the Study:

  • To investigate the association between APOE genotype/alleles and physiological/pathological brain aging.
  • To determine if APOE variants impact longevity, particularly in the oldest old.

Main Methods:

  • Comparative analysis of APOE genotype and allele distributions.
  • Study cohorts included centenarians (n=106), cognitively normal octogenarians (n=351), and octogenarians with AD (n=294).

Main Results:

  • No significant differences in APOE genotype/allele distributions were found between controls and centenarians.
  • APOE ε4 allele prevalence was significantly lower in centenarians compared to AD patients.
  • APOE ε2 and ε3 alleles were more frequent in centenarians, while ε4 was less frequent, showing a positive association with AD and negative with longevity.

Conclusions:

  • The APOE ε4 allele is strongly associated with an increased risk of Alzheimer's disease.
  • APOE genotype significantly influences AD risk but does not appear to be a major determinant of human longevity.