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Concomitant brainstem axonal dystrophy and necrotizing myopathy in vitamin E-deficient rats
S R Pillai1, M G Traber, H J Kayden
1Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, AL 36849.
Journal of the Neurological Sciences
|May 1, 1994
Summary
Vitamin E depletion in rats led to severe alpha-tocopherol loss in tissues, preceding muscle and nerve damage. These vitamin E deficiency effects occurred independently in muscle and nervous tissues.
Area of Science:
- Biochemistry
- Neuroscience
- Pathology
Background:
- Vitamin E is a crucial antioxidant protecting cell membranes.
- Its deficiency can lead to various health issues, including neurological and muscular problems.
- Understanding the timeline and tissue-specific effects of vitamin E depletion is vital.
Purpose of the Study:
- To investigate the impact of vitamin E depletion on alpha-tocopherol levels.
- To assess electrophysiological changes in rats with vitamin E deficiency.
- To correlate tissue alpha-tocopherol concentrations with histopathological findings.
Main Methods:
- Wistar rats were fed vitamin E-deficient or control diets for up to 61 weeks.
- Electrophysiologic tests included electromyography and evoked potentials.
- Tissue alpha-tocopherol concentrations and histopathology of nervous system and muscles were analyzed.
Main Results:
- Severe alpha-tocopherol depletion occurred in adipose tissue and peripheral nerves by 61 weeks.
- Histopathology revealed type 1 muscle fiber necrosis and spheroids in gracile and cuneate nuclei.
- Electrophysiological tests remained normal throughout the study period.
Conclusions:
- Low tissue alpha-tocopherol concentrations precede observable histological changes.
- Vitamin E deficiency causes distinct pathological changes in muscle and nervous tissues.
- These findings highlight the independent progression of pathology in different tissues during vitamin E deficiency.