Radiation biology. Radioecology
ISSN: 0869-8031

Archives → 2019 → Vol. 59, No. 1 → pp. 82-93

Article

Reaction of Erythropoiesis on Trypanosomal Invasion in Fish Inhabiting the Radioactive Contaminated Techa River

Tryapitsyna G.A.1,2, Pryakhin E.A.1, Osipov D.I.1, Egoreichenkov E.A.1,2, Rudolfsen G.3,4, Teyen H.-K.5, Sneve M.3, Akleyev A.V.1,2

1Urals Research Center for Radiation Medicine, Chelyabinsk, Russia 2 Chelyabinsk State University, Chelyabinsk, Russia 3Norwegian Radiation Protection Authority, Tromso, Norway 4University of Tromso, Tromso, Norway 5Norwegian University of Life Sciences (UMB), Center of Excellence in Environmental Radioactivity (CERAD), As, Norway

Abstract

The influence of trypanosomal invasion on the erythropoiesis in fish (roach (Rutilus rutilus L., 1758), perch Perca fluviatilis L., 1758), pike Esox lucius L., 1758), inhabiting radioactively contaminated Techa Rivera and in fish inhabiting the comparison watercourse Miass River was performed. It is shown that in summer the proportion of infected fish (40%) is higher than in spring (20%); the highest incidence rate was in perch (45%), the next was pike (23%) and the lowest level was in roach (14%). The incidence rate declines from the upper reaches (44%) to the lower reaches (12%). Under conditions of chronic radiation exposure in the dose range of 3–150 μGy/day, the combined effect of radiation and trypanosomal invasion is characterized by antagonistic interaction on the productivity of blast cells and the additive interaction on the production of more differentiated (normocytes) cells and the number of mature erythrocytes. A statistically significant effect of trypanosomal invasion on the percentage composition of erythroid cells of different degree of maturity in peripheral blood was revealed. The dose rate of irradiation statistically significantly affects the percentage of erythroblasts and pronormocytes and the absolute number of erythroid cells in the peripheral blood. Trypanosomal invasion in fish can modify the effect of radiation on hematopoiesis.

Keywords

Radioactive contamination, radionuclides, Techa River, erythropoiesis, trypanosomes, fish

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