Abstract
Suckling rats were exposed to methylmercury chloride or diethylmercury in order to induce chronic sublethal intoxication during the period of active myelination. Doses of 5 mg Hg/kg body weight were injected every second day from 5-25 days of age. The rats were killed at 27-28 days of age, and the brains contained about 1 microgram Hg/g wet weight. No changes in brain weight, myelin content of proteins or phospholipids were found, whereas the cholesterol and galactolipid levels were slightly reduced. The most significant change observed was a decrease in the ratio between alpha-hydroxy fatty acid and the nonsubstituted fatty acid in the myelin cerebrosides. The biochemical changes were less pronounced in the animals given diethylmercury than in animals receiving methylmercury.
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