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Long-Term Vitamin E-Deficient Mice Exhibit Cognitive Dysfunction via Elevation of Brain Oxidation
Koji Fukui1, Keisuke Nakamura, Masashi Shirai
1Physiological Chemistry Laboratory, Department of Bioscience and Engineering, College of Systems Engineering and Sciences, Shibaura Institute of Technology.
Journal of Nutritional Science and Vitaminology
|December 8, 2015
Summary
Vitamin E deficiency impairs cognitive function and accelerates brain oxidation. Monitoring vitamin E levels is crucial for preventing cognitive dysfunction, even in healthy individuals.
Area of Science:
- Neuroscience
- Nutritional Science
- Biochemistry
Background:
- Vitamin E is a key antioxidant protecting tissues from oxidative damage.
- Chronic vitamin E deficiency's impact on cognitive function remains incompletely understood.
- Oxidative stress in the brain is implicated in cognitive decline.
Purpose of the Study:
- To investigate the effects of chronic vitamin E deficiency on cognitive function in mice.
- To assess the relationship between vitamin E deficiency, brain oxidation, and cognitive performance.
- To determine if vitamin E deficiency influences lipid peroxidation and cholesterol levels in the brain.
Main Methods:
- Vitamin E-deficient diet induced deficiency in mice.
- Cognitive function assessed using the Morris water maze task.
- Antioxidant enzyme activity, lipid peroxidation, and serum cholesterol measured in brain regions.
Main Results:
- Short-term vitamin E deficiency (3 months) impaired cognitive function.
- Long-term vitamin E deficiency (6 months) increased lipid peroxidation in brain regions.
- Both short- and long-term deficiency elevated serum cholesterol levels.
- Aged mice (24 months) were used as a control for aging effects.
Conclusions:
- Chronic vitamin E deficiency may accelerate brain oxidation and impair cognitive function.
- Elevated lipid peroxidation and cholesterol suggest increased oxidative stress.
- Maintaining adequate vitamin E levels is important for preserving cognitive health.
