Head circumference, apolipoprotein E genotype and cognition in the Bavarian School Sisters Study
R Perneczky1, P Alexopoulos, S Wagenpfeil
1Department of psychiatry and psychotherapy, Technische Universität München, 22, Ismaninger Street, 81675 München, Germany. robert.perneczky@lrz.tum.de
Summary
Larger head circumference may protect against Alzheimer's disease risks. This study found that a larger head size can reduce the negative cognitive effects associated with the apolipoprotein E (APOE) ɛ4 allele.
Area of Science:
- Neuroscience
- Genetics
- Cognitive Aging
Background:
- The apolipoprotein E (APOE) ɛ4 allele is a known risk factor for early-onset Alzheimer's disease.
- Larger head circumference has been linked to cognitive resilience.
Purpose of the Study:
- To investigate if larger head circumference mitigates the cognitive impact of the APOE ɛ4 allele.
- Examining the interplay between genetic predisposition and physical traits in cognitive decline.
Main Methods:
- Studied 380 Catholic sisters across a cognitive spectrum.
- Utilized linear regression analysis, controlling for cognitive decline risk factors.
Main Results:
- APOE ɛ4 allele correlated with poorer cognitive function.
- Larger head circumference attenuated the detrimental effects of the APOE ɛ4 allele on cognition.
Conclusions:
- Larger head circumference (indicating larger brain size) may confer resilience against genetic factors influencing cognitive impairment.
- Enhanced brain or cognitive reserve might explain this protective association.
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