Increased Yield of Residual γH2AX Foci in p53-Deficient Human Lung Carcinoma Cells Exposed to Subpicosecond Beams of Accelerated Electrons.
Bull Exp Biol Med
; 172(6): 756-759, 2022 Apr.
Article
en En
| MEDLINE
| ID: mdl-35501643
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.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Histonas
/
Proteína p53 Supresora de Tumor
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Electrones
/
Neoplasias Pulmonares
Límite:
Humans
Idioma:
En
Revista:
Bull Exp Biol Med
Año:
2022
Tipo del documento:
Article
País de afiliación:
Rusia