Evidence for Msh2 haploinsufficiency in mice revealed by MNU-induced sister-chromatid exchange analysis.

Evidence for Msh2 haploinsufficiency in mice revealed by MNU-induced sister-chromatid exchange analysis.
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DOI:
10.1054/bjoc.2000.1422
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发表时间:
2000-11
影响因子:
8.8
通讯作者:
Fodde R
Fodde R
中科院分区:
医学1区
文献类型:
--
作者:
Bouffler SD;Hofland N;Cox R;Fodde R

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在HNPCC Msh 2 Δ 7 N的靶向小鼠模型中研究了Msh 2在染色体稳定性中的作用。Msh 2 +/+ Msh 2 +/-和Msh 2-/-小鼠骨髓中的染色体畸变频率相似,并且未观察到体内X射线照射的差异效应。相比之下,甲基亚硝基脲(MNU)诱导的姐妹染色单体交换(SCE)在Msh 2-/-和Msh 2 +/-细胞中分别降低至~20%和~45%野生型水平,表明小鼠Msh 2基因单倍不足的表型效应。© 2000癌症研究运动
The role of Msh2 in chromosome stability has been investigated in a targeted mouse model for HNPCC Msh2Δ7N. Chromosome aberration frequencies were similar in bone marrow of Msh2+/+Msh2+/–and Msh2–/–mice and no differential effects of in vivo X-irradiation were noted. By contrast, the induction of sister-chromatid exchanges (SCEs) by methyl nitrosourea (MNU) was reduced in Msh2–/–and Msh2+/–cells to ~20% and ~45% wild-type levels respectively indicating a phenotypic effect of haploinsufficiency of the mouse Msh2 gene. © 2000 CancerResearch Campaign
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