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Plasma antioxidant activity and vascular dementia
Danuta Ryglewicz1, Maria Rodo, Piotr Krzysztof Kunicki
1Institute of Psychiatry and Neurology, National Institute of Cardiology, Warsaw, Poland.
Journal of the Neurological Sciences
|November 6, 2002
Summary
Vascular dementia patients show lower alpha-tocopherol levels, indicating reduced antioxidant defense after a stroke. This suggests a link between antioxidant status and cognitive impairment following stroke.
Area of Science:
- Neuroscience
- Biochemistry
- Gerontology
Background:
- Antioxidant activity's role in stroke-induced neuronal damage is poorly understood.
- Reduced antioxidant defense and increased free radicals may exacerbate neuronal injury.
- Low alpha-tocopherol concentrations may contribute to post-stroke dementia development.
Purpose of the Study:
- To assess alpha-tocopherol levels in dementia patients versus controls.
- To evaluate low-density lipoprotein (LDL) susceptibility to oxidation in dementia patients.
- To investigate the relationship between antioxidant status and cognitive impairment post-stroke.
Main Methods:
- Compared 68 dementia patients (42 vascular dementia, 26 Alzheimer's type) with 46 controls.
- Measured lipids, alpha-tocopherol, and LDL oxidation kinetics.
- Utilized DSM-IV criteria for dementia diagnosis.
Main Results:
- Vascular dementia patients had significantly lower triglycerides and LDL compared to Alzheimer's patients.
- Alpha-tocopherol levels were significantly lower in vascular dementia patients (9.9 ng/ml) versus Alzheimer's (12.6 ng/ml) and controls (12.6 ng/ml).
- No significant differences in LDL oxidation susceptibility were found between groups.
Conclusions:
- Patients with vascular dementia exhibit reduced plasma alpha-tocopherol levels.
- This indicates a compromised antioxidant defense system in vascular dementia.
- Findings suggest a potential role for alpha-tocopherol in mitigating stroke-related cognitive decline.