The total gamma-irradiation of Wistar rats at a dose of 0.25 Gy as well as at higher doses (0.5, 2 and 4.5 Gy) produces in the capillary endothelial cells of myocardium and lung a pronounced, dose-independent increase of the yield of necrotized cells. Similar changes were revealed in the animals, of which one of the parents (a male one day, a female seven days prior to copulation) was irradiated at doses of 0.25 and 0.5 Gy. This effect was observed in all studied descendants. The massive induction of the changes already by low radiation actions and their dose-independence allow considering the revealed effects as a manifestation of peculiar cellular reactions that presumably have epigenetic nature.
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