Induction of chromosomal aberrations and sister chromatid exchanges by alpha particles in density-inhibited cultures of mouse 10T1/2 and 3T3 cells.

Induction of chromosomal aberrations and sister chromatid exchanges by alpha particles in density-inhibited cultures of mouse 10T1/2 and 3T3 cells.
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在小鼠 10T1/2 和 3T3 细胞的密度抑制培养物中,α 粒子诱导染色体畸变和姐妹染色单体交换。

DOI:
10.1080/09553009014550321
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发表时间:
1990
影响因子:
2.6
通讯作者:
Little,JB
Little,JB
中科院分区:
医学3区
文献类型:
--
作者:
Nagasawa,H;Robertson,J;Little,JB

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我们研究了220 kV X射线和5·3 MeV α粒子诱发细胞杀伤、染色体畸变和姐妹染色单体交换(SCE)的剂量-反应关系。在密度抑制的融合培养物中照射细胞。小鼠3 T3细胞的X射线和α粒子存活曲线的D_0值分别为1·7戈伊和0·7戈伊,外推数分别为2·5和1·0。在3 T3细胞中,染色体畸变随α辐射剂量线性增加,大致随X射线剂量的平方增加。在37%的存活率下,X射线诱导每个细胞1.0个染色体畸变,α射线诱导每个细胞1.7个染色体畸变,但没有畸变的细胞比例相似。在汇合保持恢复实验中,在汇合保持的第一个4小时期间,X射线诱导的畸变减少了50%。放置时间长达24 h时,未观察到α诱导的畸变下降。在3 T3和10 T1/2细胞中,X射线诱导SCE的剂量-反应关系随剂量增加而线性增加,直至100 cGy,然后下降,在400 cGy后接近背景水平。在2.5 ~ 5.0cGy剂量范围内,SCE的诱导率迅速升高,然后下降。低剂量(2.5 ~ 5.0cGy)α粒子诱发SCE的相对生物学效应(RBE)为15-25。
We examined the dose—response relationships for the induction of cell killing, chromosomal aberrations and sister chromatid exchanges (SCE) by 220 kV X-rays and 5·3 MeV alpha particles from a238Pu source. The cells were irradiated in density-inhibited, confluent cultures. TheD0values for the X-ray and alpha particle survival curves were 1·7 Gy and 0·7 Gy, and the extrapolation numbers 2·5 and 1·0, respectively, for mouse 3T3 cells. Chromosomal aberrations increased linearly with dose for alpha-radiation and roughly with the square of dose for X-rays in 3T3 cells. At 37 per cent survival, 1·0 chromosomal aberration per cell was induced by X-rays and 1·7 per cell by alpha-radiation, but the fraction of cells without aberrations was similar. In confluent holding recovery experiments there was a 50 per cent reduction in X-ray-induced aberrations during the first 4 h of confluent holding. No decline in alpha-induced aberrations was observed with holding times up to 24 h. The dose—response relationship for the induction of SCE by X-rays increased linearly with doses up to 100 cGy in both 3T3 and 10T½ cells, then declined, reaching nearly background levels after 400 cGy. The induction of SCE increased rapidly in these cell lines with doses of 2·5–5·0 cGy of alpha-radiation, then declined. The relative biological effectiveness (RBE) was 15–25 for the induction of SCE by low doses (2·5–5·0 cGy) of alpha particles.
DNA 修复和恶性转化:X 射线照射、12-O-十四烷酰基-佛波醇-13-乙酸酯和蛋白酶抑制剂对小鼠 10T 1/2 细胞转化和姐妹染色单体交换的影响。
DOI: 10.2307/3575095
发表时间: 1979
期刊: Radiation research
影响因子: 3.4
作者:
J. Little;H. Nagasawa;A. Kennedy
通讯作者: A. Kennedy
姐妹染色单体交换——一种对破坏人类染色体的试剂的灵敏测定。
DOI: 10.1016/s0027-5107(75)80013-3
发表时间: 1975
期刊: Mutation research
影响因子: --
作者:
E. Solomon;M. Bobrow
通讯作者: M. Bobrow
钚 238 α 粒子在 G0 淋巴细胞中诱导姐妹染色单体交换 (SCE)。
DOI: --
发表时间: 1988
期刊: International Journal of Radiation Biology and Related Studies in Physics Chemistry and Medicine
影响因子: --
作者:
S. Aghamohammadi;D. T. Goodhead;J. R. Savage
通讯作者: J. R. Savage
DOI: 10.1093/jnci/21.3.437
发表时间: 1958
期刊: Journal of the National Cancer Institute
影响因子: --
作者:
T. Hsu;Oleta Klatt
通讯作者: Oleta Klatt
X射线照射的正常人二倍体成纤维细胞汇合保持恢复期间染色体畸变和姐妹染色单体交换频率的变化。
DOI: 10.1080/09553008514551651
发表时间: 1985
期刊: International journal of radiation biology and related studies in physics, chemistry, and medicine
影响因子: --
作者:
Nagasawa,H;Little,JB
通讯作者: Little,JB