[Localization and causes of lipid peroxidation disorders in the rat cerebral cortex in the early stages of hereditary retinal degeneration].

It is established that previously observed increased rate of the induced lipid peroxidation in brain tissue of rats with hereditary retinal degeneration as compared with normal rats is due to the change of the rate of this process in the microsome cortex brain fraction and was not observed in the mitochondrial-synaptosomal and nuclear fractions. The content of nonheme iron ions in microsome cortex brain fraction of the Campbell rats is decreased by 35% and of the Fe ion was in the reduced form as compared with the Wistar rats. The ratio of Fe2+/Fe3+ in this fraction of the Campbell rats will be 5.21; Wistar rats--0.51. The increase of the reduced form of the Fe ion may be a result of the increased rate of the glucose-6-phosphate dehydrogenase activity in cortex brain tissue of the Campbell rats. We accept change of the content and the forms of the Fe ions in the microsome cortex brain fraction as a cause of the increased rate of induced lipid peroxidation in brain of the Campbell rats. All the observed phenomena are manifested at the early stage of life and indicated that different metabolic disorders can be observed in the Campbell rats not only in the retina and eye pigment epithelium but also in the brain tissue.