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APOE epsilon4 is associated with impaired verbal learning in patients with MS

G Koutsis1, M Panas, E Giogkaraki

  • 1Department of Neurology, University of Athens, Aeginition Hospital, Greece. gkoutsi2@otenet.gr

Neurology
|February 21, 2007
PubMed
Abstract

Insights

The APOE epsilon4 gene variant significantly increases the risk of verbal learning impairment in multiple sclerosis (MS) patients. This finding highlights a specific genetic risk factor for cognitive decline in MS.

Area of Science:

  • Neuroscience
  • Genetics
  • Neurology

Background:

  • Multiple sclerosis (MS) is a chronic neurological disease affecting cognitive function.
  • The apolipoprotein E (APOE) epsilon4 allele is a known risk factor for various neurological disorders.

Purpose of the Study:

  • To examine the impact of the APOE epsilon4 allele on cognitive performance in Greek patients with MS.
  • To identify specific cognitive domains affected by APOE epsilon4 in MS.

Main Methods:

  • Neuropsychological assessment using Rao's Brief Repeatable Battery.
  • Genotyping for the APOE gene in 125 MS patients and 43 controls.
  • Statistical analysis to determine the association between APOE epsilon4 and cognitive function.

Main Results:

  • Cognitive impairment was present in 51% of MS patients.
  • APOE epsilon4 carriers showed a sixfold increased risk of verbal learning impairment compared to non-carriers (OR 6.28).
  • The association was specific to verbal learning, with no significant effects observed in other cognitive domains.

Conclusions:

  • The APOE epsilon4 allele is associated with impaired verbal learning in patients with multiple sclerosis.
  • This genetic factor may contribute to specific cognitive deficits in MS.

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