The level of induced DNA double-strand breaks does not correlate with cell killing in X-irradiated mitotic and G1-phase CHO cells.
The level of induced DNA double-strand breaks does not correlate with cell killing in X-irradiated mitotic and G1-phase CHO cells.
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在 X 射线照射的有丝分裂和 G1 期 CHO 细胞中,诱导的 DNA 双链断裂水平与细胞杀伤无关。
DOI:
10.1080/09553008814552531
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发表时间:
1988
期刊:
影响因子:
--
通讯作者:
Okayasu,R
中科院分区:
文献类型:
--
作者:
Iliakis,G;Okayasu,R
The neutral (pH 9·6) filter elution technique was used to evaluate DNA damage induced in CHO cells irradiated at mitosis or in G1-phase under various incubation and postirradiation treatment conditions. Mitotic and G1/S border cells were more sensitive to radiation than G1cells with respect to cell killing, but showed similar (G1/S) or lower (M) DNA elution dose–response curves. Similar cell survival and DNA/elution dose–response curves were obtained with plateauphase cultures containing mainly G1-cells, as well as with G1cells obtained after division of mitotic cells in either fresh or conditioned medium. However, survival of plateau-phase cells could be modified substantially by delayed-plating or postirradiation treatment with araA. These results, together with previously published observations, indicate that induction of DNA dsb cannot be invoked as an explanation for the variations in radiosensitivity observed through the cycle, or as an explanation for the formation of the survival curve shoulder. It is proposed that repair and fixation of radiation-induced DNA damage, expressed at the cell survival level as repair and fixation of alpha-PLD, are responsible for these effects.
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影响因子:
3.4
作者:
G. Iliakis;M. Nüsse
通讯作者:
M. Nüsse
影响因子:
64.8
作者:
T. Terasima;T. Terasima;L. Tolmach
通讯作者:
L. Tolmach
DOI:
10.1080/09553008314550681
发表时间:
1983
期刊:
International journal of radiation biology and related studies in physics, chemistry, and medicine
影响因子:
--
作者:
D. Blöcher;M. Nüsse;P. Bryant
通讯作者:
P. Bryant
影响因子:
3.4
作者:
H. Sasaki;T. Nishimoto
通讯作者:
T. Nishimoto
影响因子:
1.7
作者:
G. Iliakis;M. Nüsse
通讯作者:
M. Nüsse