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Updated: Jul 10, 2026
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Generalized Psychophysiological Interaction (PPI) Analysis of Memory Related Connectivity in Individuals at Genetic Risk for Alzheimer's Disease
Published on: November 14, 2017
Association between apolipoprotein E4 and cognitive decline in elderly adults.
Chris J Packard1, Rudi G J Westendorp, David J Stott
1Department of Vascular Biochemistry, University of Glasgow, Glasgow, Scotland. chris.packard@clinmed.gla.ac.uk
Journal of the American Geriatrics Society
|November 6, 2007
Summary
The apolipoprotein E(4) variant is linked to faster cognitive decline in older adults, increasing dementia risk. This finding highlights the role of E(4) in age-related cognitive impairment.
Area of Science:
- Neuroscience
- Genetics
- Gerontology
Background:
- Cognitive decline is a significant concern in aging populations.
- Apolipoprotein E (APOE) genotype is a known risk factor for Alzheimer's disease.
- The specific impact of APOE on cognitive function in non-demented elderly individuals requires further elucidation.
Purpose of the Study:
- To investigate the association between apolipoprotein E (APOE) genotype and cognitive decline in elderly individuals.
- To determine if APOE influences memory, information processing speed, and daily living activities over time.
Main Methods:
- Prospective cohort study (PROSPER) involving 5,804 participants aged 70-82.
- Cognitive assessments included memory (Picture-Word Recall) and information processing speed (Stroop, Letter-Digit Coding).
- Follow-up averaged 3.2 years, with repeated cognitive and activities of daily living assessments.
Main Results:
- APOE ε4 carriers exhibited poorer baseline memory and slower processing speed compared to non-carriers.
- APOE ε4 was associated with a significantly greater decline in memory scores over the follow-up period.
- A decline in instrumental activities of daily living was also associated with APOE ε4 presence.
Conclusions:
- The APOE ε4 allele is associated with accelerated cognitive decline in elderly individuals.
- APOE ε4 may predispose individuals to dementia by exacerbating age-related cognitive changes.
- These findings underscore the importance of genetic factors in cognitive aging.
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