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Published on: October 1, 2013
Adipose tissue fatty acid composition and cognitive impairment
Frej Stilling1, Alicja Wolk2, Dorota Religa3
1Unit of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden.
Higher levels of eicosapentaenoic acid (EPA) to arachidonic acid (AA) in adipose tissue may be linked to better cognitive function. This association was also seen with EPA, docosahexaenoic acid (DHA), and their ratios to AA.
Area of Science:
- Nutritional Neuroscience
- Biomarkers of Cognitive Health
Background:
- Cognitive function decline is a growing public health concern.
- Omega-3 and omega-6 fatty acids play crucial roles in brain health.
- Adipose tissue fatty acid composition may reflect long-term dietary intake and systemic levels.
Purpose of the Study:
- To investigate the association between adipose tissue fatty acid composition, specifically eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), arachidonic acid (AA), and their ratios, with impaired cognitive function.
- To explore the relationship with incident dementia in a prospective analysis.
Main Methods:
- Cross-sectional analysis of 481 Swedish men from the Cohort of Swedish Men-Clinical.
- Adipose tissue fatty acid composition and cognitive function were assessed.
- Binomial log-linear regression and Cox proportional hazards models were used.
Main Results:
- A graded reduction in impaired cognitive function was observed with increasing tertiles of the adipose tissue EPA/AA ratio (Ptrend=0.01).
- The highest tertile of EPA/AA ratio was associated with a 36% lower prevalence of impaired cognitive function compared to the lowest tertile (PR=0.64, 95% CI 0.45-0.91).
- EPA, DHA, and the DHA/AA ratio showed similar trends, though confidence intervals included the null; AA alone was not associated.
Conclusions:
- A higher ratio of EPA to AA in adipose tissue may be associated with better cognitive function.
- While EPA, DHA, and DHA/AA ratios showed similar patterns, the association was less definitive.
- These findings highlight the potential role of specific fatty acid profiles in maintaining cognitive health.
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