Apolipoprotein E, cardiovascular disease and cognitive function in aging women

Area of Science:

• Neuroscience
• Genetics
• Epidemiology

Background:

• The apolipoprotein E (APOE) e4 allele is a known risk factor for Alzheimer disease and cardiovascular diseases.
• Understanding the impact of APOE genotypes on cognitive function is crucial for developing targeted interventions.

Purpose of the Study:

• To investigate the association between APOE genotypes, cardiovascular conditions, and cognitive function in older women.
• To examine the influence of APOE on cognitive decline over time.

Main Methods:

• Analysis of APOE genotypes in 4227 Nurses' Health Study participants (aged 70-80).
• Telephone cognitive assessments (general cognition, fluency, memory) conducted from 1995-2001 and 2 years later.
• Correlation of cognitive data with self-reported cardiovascular conditions from biennial questionnaires since 1976.

Main Results:

• APOE e4 carriers performed worse at baseline and showed greater cognitive decline compared to e3/3 genotype women (p-trend=0.0003).
• APOE e2 carriers aged 75+ demonstrated the best cognitive performance.
• Women with APOE e4 and cardiovascular conditions (e.g., TIA, hypertension) exhibited the poorest cognitive outcomes.

Conclusions:

• APOE genotype significantly influences cognitive function and decline in older women.
• Cardiovascular disease prevention may be a key strategy to limit APOE e4-associated cognitive impairment.