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Apolipoprotein E and Alzheimer's disease

W J Strittmatter1, A D Roses

  • 1Department of Medicine (Neurology), Joseph and Kathleen Bryan Alzheimer's Disease Research Center, Duke University Medical Center, Durham, North Carolina, 27710, USA.

Annual Review of Neuroscience
|January 1, 1996
PubMed
Summary

The apolipoprotein E (APOE) gene influences Alzheimer's disease risk and onset age. Specific APOE variants, particularly APOE4, significantly impact disease progression and molecular interactions within the brain.

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Area of Science:

  • Neuroscience
  • Genetics
  • Biochemistry

Background:

  • The apolipoprotein E locus (APOE) is a key genetic factor influencing Alzheimer's disease (AD) risk and age of onset.
  • APOE gene variations, specifically alleles APOE4, APOE3, and APOE2, differentially affect AD probability and disease timing.

Purpose of the Study:

  • To explore the relevance of apolipoprotein E metabolism in Alzheimer's disease pathogenesis.
  • To investigate how APOE isoform-specific interactions contribute to disease expression and progression.

Main Methods:

  • Review of existing literature on APOE genetics and Alzheimer's disease.
  • Analysis of isoform-specific molecular interactions of apolipoprotein E.
  • Examination of APOE interactions with AD pathological hallmarks like neurofibrillary tangles and neuritic plaques.

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Main Results:

  • The APOE4 allele is linked to an increased probability and earlier onset of Alzheimer's disease.
  • APOE3 and APOE2 alleles are associated with decreased disease probability and later onset.
  • APOE isoforms exhibit specific interactions with other molecules and AD pathologies.

Conclusions:

  • Apolipoprotein E metabolism and its isoform-specific interactions are critical to understanding Alzheimer's disease pathogenesis.
  • These interactions may dictate the rate of disease expression through unique molecular pathways.
  • Current hypotheses on AD pathogenesis increasingly incorporate the role of apolipoprotein E.