Tryapitsina G A, Osipov D I, Yegoreichenkov E A, Shishkina E A, Rudolfsen G, Teien H C, Sneve M, Pryakhin E A, Akleyev A V
Radiats Biol Radioecol. 2017 Jan;57(1):98-107.
At present volumetric activity of β-emitting radionuclides in water at various locations of the Techa River ranges from 5 to 40-Bq/L; a specific activity of β-emitting radionuclides in the bottom sediments at various locations ranges 10 Ito 106 Bq/kg dry weight. A significant increase of the erythroblast content in blood as compared to that in the roach from the reference watercourse (the Miass River) was observed during spawning in the spring. Due to this fact the number of erythrocytes was equal to that in the control animals under chronic radiation exposure at the dose rates of 0.9 and 16 μGy/day, and was insufficient at the dose rate of 108 gGy/day. During summer feeding no changes in the indexes of erythropoiesis in roach were observed under chronic radiation exposure at the dose rate of 0.9 μGy/day; the number of erythrocytes in the peripheral blood declines when the dose rates are 16 and 108 μGy/day. When performing a regression analysis, we revealed a dose-rate-dependent decrease in the absolute number of erythrocytes, normocytes, polychromatocytes, dividing and non-dividing erythroid cells in the peripheral blood of roach from the Techa River and an increase of a relative number of normochromatophylic erythrocytes.
目前，捷恰河不同位置水体中β发射性放射性核素的比活度范围为5至40贝可勒尔/升；不同位置底部沉积物中β发射性放射性核素的比活度范围为10至10⁶贝可勒尔/千克干重。春季产卵期间，与对照水道（米亚斯河）中的拟鲤相比，观察到血液中红细胞含量显著增加。由于这一事实，在0.9和16微戈瑞/天的剂量率慢性辐射暴露下，红细胞数量与对照动物相同，而在108戈瑞/天的剂量率下则不足。夏季摄食期间，在0.9微戈瑞/天的剂量率慢性辐射暴露下，未观察到拟鲤红细胞生成指标的变化；当剂量率为16和108微戈瑞/天时，外周血中的红细胞数量减少。进行回归分析时，我们发现捷恰河拟鲤外周血中红细胞、正常红细胞、多染性红细胞、分裂和未分裂红细胞的绝对数量呈剂量率依赖性下降，正色红细胞的相对数量增加。
