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Activities of 2 enzymes protecting from free radical damage, erythrocyte glutathione peroxidase and superoxide dismutase, were measured in 4 patients with Alzheimer's disease, in 4 with multi-infarct dementia, in 1 with Huntington's disease and in 1 with Hakola-Nasu disease. In none of these dementing diseases the activities were diminished compared to controls.
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Sulkava et al. (1986) studied this question.
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