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Long-Term Persistence of Increased Number of γH2AX + Peripheral Blood Lymphocytes in Monkeys Exposed to Negative Factors of Space Flights: Ionizing Radiation and Simulated Hypogravity.

Authors :
Blokhinа TM
Yashkina EI
Belyaeva AG
Perevezentsev AA
Shtemberg AS
Osipov AN
Source :
Bulletin of experimental biology and medicine [Bull Exp Biol Med] 2021 Nov; Vol. 172 (1), pp. 81-84. Date of Electronic Publication: 2021 Nov 18.
Publication Year :
2021

Abstract

We studied the influence of ionizing radiation and hypogravity as negative factors of space flights on DNA damage in peripheral blood lymphocytes of rhesus monkeys at different times after exposure (from 1 to 446 days). The proportion of cells with high numbers of DNA double-strand breaks (DSB), positive for the surrogate DSB marker-protein γH2AX, was monitored using flow cytometry. Some animals were exposed to 7-day antiorthostatic hypokinesia simulating hypogravity, the others to a combined effect of antiorthostatic hypokinesia, whole-body γ-irradiation (2.34 cGy/h, dose 1 Gy), and irradiation of the head with <superscript>12</superscript> C ions (450 MeV, dose 1 Gy). Exposure to antiorthostatic hypokinesia led to a significant increase in the proportion of γH2AX <superscript>+</superscript> lymphocytes only on the first day after exposure, whereas after combined exposure, increased numbers of damaged lymphocytes were recorded up to 42 days after exposure.<br /> (© 2021. Springer Science+Business Media, LLC, part of Springer Nature.)

Details

Language :
English
ISSN :
1573-8221
Volume :
172
Issue :
1
Database :
MEDLINE
Journal :
Bulletin of experimental biology and medicine
Publication Type :
Academic Journal
Accession number :
34791560
Full Text :
https://doi.org/10.1007/s10517-021-05336-8