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Associations between white matter lesions, cerebrovascular risk factors, and low CSF Abeta42

V Stenset1, L Johnsen, D Kocot

  • 1Department of Neurology, Akershus University Hospital, Sykehusveien 27, NO-1478 Lørenskog, Norway. vidar.stenset@medisin.uio.no

Neurology
|September 13, 2006
PubMed
Abstract

Insights

White matter lesions (WMLs) and hypercholesterolemia are linked to lower cerebrospinal fluid Abeta42 levels, a marker for Alzheimer disease (AD). These factors may independently impact AD progression.

Area of Science:

  • Neurology
  • Neuroimaging
  • Biomarkers

Background:

  • Alzheimer disease (AD) is a progressive neurodegenerative disorder.
  • White matter lesions (WMLs) are common in aging and associated with cognitive decline.
  • Cerebrospinal fluid (CSF) Abeta42 is a key biomarker for AD pathology.

Purpose of the Study:

  • To investigate the relationship between WMLs, their risk factors, and AD biomarkers.
  • To determine if cerebrovascular risk factors influence WMLs and AD markers.

Main Methods:

  • 127 patients with memory impairment underwent brain MRI for WML assessment.
  • WMLs were quantified using a semiquantitative scale.
  • Path analysis explored associations between risk factors (hypertension, hyperhomocysteinemia, hypercholesterolemia, APOE-epsilon4) and WMLs/CSF Abeta42.

Main Results:

  • Hypertension and hyperhomocysteinemia were significantly associated with higher WML scores.
  • Hypercholesterolemia increased the likelihood of low CSF Abeta42 levels.
  • Increased WML scores and the APOE-epsilon4 genotype were linked to reduced CSF Abeta42.

Conclusions:

  • Both hypercholesterolemia and WMLs appear to independently contribute to reduced CSF Abeta42 levels.
  • These findings suggest distinct pathways influencing AD pathology.

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