Peculiarities of the effect of low-dose-rate radiation simulating high-altitude flight conditions on mice in vivo |
| |
Authors: | S I Zaichkina O M Rozanova G F Aptikaeva A Kh Akhmadieva E N Smirnova S P Romanchenko N P Sirota O A Vachrusheva V N Peleshko |
| |
Institution: | (1) Institute of Theoretical and Experimental Biophysics, Pushchino, Russia;(2) Institute of High Energy Physics, Protvino, Russia |
| |
Abstract: | In the present work, the effect of a low-dose rate of high-LET radiation in polychromatic erythrocytes of mice bone marrow
was investigated in vivo. The spectral and component composition of the radiation field used was similar to that present in
the atmosphere at an altitude of about 10 km. The dose dependence, adaptive response, and genetic instability in the F1 generation born from males irradiated under these conditions were examined using the micronucleus test. Irradiation of the
mice was performed for 24 h per day in the radiation field behind the concrete shield of the Serpukhov accelerator. Protons
of 70 GeV were used over a period of 15–31 days, to accumulate doses of 11.5–31.5 cGy. The experiment demonstrated that irradiation
of mice in vivo in this dose range leads to an increase in cytogenetic damage to bone marrow cells, but does not induce any
adaptive response. In mice pre-irradiated with a dose of 11.5 cGy, an increase in sensitivity was observed after an additional
irradiation with a dose of 1.5 Gy. The absence of an adaptive response suggests existence of genetic instability. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|