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Vincent Malotaux1,2, David Fernando Aguillón Niño3, Isabela Gonzalez1

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Summary
This summary is machine-generated.

The APOE3-Christchurch variant shows distinct brain structure differences in carriers, with increased fronto-parietal cortical thickness, potentially contributing to Alzheimer's disease resistance.

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Area of Science:

  • Neuroimaging
  • Genetics
  • Alzheimer's Disease Research

Background:

  • The APOE3-Christchurch (APOE3Ch) variant is associated with protection against Alzheimer's disease (AD).
  • Mechanisms of AD resistance linked to APOE3Ch are not fully understood.
  • Structural neuroimaging may reveal early brain changes in AD-resistant individuals.

Purpose of the Study:

  • To investigate early structural brain differences in middle-aged heterozygous APOE3Ch carriers compared to non-carriers.
  • To analyze cortical thickness (CT) patterns in relation to AD risk and resistance.

Main Methods:

  • Structural MRI was used to assess cortical thickness in 52 non-demented individuals (15 APOE3Ch carriers, 37 non-carriers).
  • Voxel-based morphometry and region of interest (ROI) analyses were performed.
  • Clinical measures included Mini-Mental State Exam (MMSE) and Functional Assessment Staging Tool (FAST) scores.

Main Results:

  • APOE3Ch carriers and non-carriers showed similar cognitive scores (MMSE, FAST).
  • APOE3Ch carriers exhibited increased cortical thickness in frontal and parietal regions.
  • Reduced cortical thickness was observed in occipital and temporal regions of APOE3Ch carriers.

Conclusions:

  • Heterozygous APOE3Ch carriers display unique early cortical thickness patterns, with greater fronto-parietal thickness.
  • These structural differences may enhance cognitive reserve and contribute to AD resistance.
  • Further multimodal brain imaging studies are needed to elucidate AD resistance mechanisms.