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- Title
Increased Yield of Residual γH2AX Foci in p53-Deficient Human Lung Carcinoma Cells Exposed to Subpicosecond Beams of Accelerated Electrons.
- Authors
Vorobyeva, N. Yu.; Babayan, N. S.; Grigoryan, B. A.; Sargsyan, A. A.; Khondkaryan, L. G.; Apresyan, L. S.; Chigasova, A. K.; Yashkina, E. I.; Guryev, D. V.; Rodneva, S. M.; Tsishnatti, A. A.; Fedotov, Yu. A.; Arutyunyan, R. M.; Osipov, A. N.
- Abstract
We studied quantitative yield of residual (24 h post-irradiation) phosphorylated histone (γH2AX) foci as a marker of DNA double strand breaks in wild-type A549 and p53-deficient H1299 human lung carcinoma cells after exposure to subpicosecond (energy 4 MeV, pulse duration 400 fsec, peak dose rate during the pulse 16 GGy/s) and quasi-continuous (energy 3.6 MeV) beams of accelerated electrons in a dose range of 0.5-10.0 Gy. The efficiency of pulse irradiation in A549 and H1299 cells assessed by the yield of residual foci was higher than the efficiency of quasi-continuous exposure by 1.8 and 5.3 times, respectively. Significant differences in quantitative yield of residual γH2AX foci between wild-type and p53-deficient cell lines were observed only after exposure to subpicosecond, but not quasi-continuous beams of accelerated electrons.
- Subjects
LUNGS; ELECTRON beams; DOUBLE-strand DNA breaks; IONIZING radiation; GAMMA rays; CARCINOMA
- Publication
Bulletin of Experimental Biology & Medicine, 2022, Vol 172, Issue 6, p756
- ISSN
0007-4888
- Publication type
Article
- DOI
10.1007/s10517-022-05472-9