p53 null fluorescent yellow direct repeat (FYDR) mice have normal levels of homologous recombination.
p53 null fluorescent yellow direct repeat (FYDR) mice have normal levels of homologous recombination.
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DOI:
10.1016/j.dnarep.2011.09.009
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发表时间:
2011-12-10
期刊:
影响因子:
3.8
通讯作者:
Engelward BP
中科院分区:
文献类型:
--
作者:
Wiktor-Brown DM;Sukup-Jackson MR;Fakhraldeen SA;Hendricks CA;Engelward BP
The tumor suppressor p53 is a transcription factor whose function is critical for maintaining genomic stability in mammalian cells. In response to DNA damage, p53 initiates a signaling cascade that results in cell cycle arrest, DNA repair or, if the damage is severe, programmed cell death. In addition, p53 interacts with repair proteins involved in homologous recombination. Mitotic homologous recombination (HR) plays an essential role in the repair of double-strand breaks (DSBs) and broken replication forks. Loss of function of either p53 or HR leads to an increased risk of cancer. Given the importance of both p53 and HR in maintaining genomic integrity, we analyzed the effect of p53 on HR in vivo using Fluorescent Yellow Direct Repeat (FYDR) mice as well as with the sister chromatid exchange (SCE) assay. FYDR mice carry a direct repeat substrate in which an HR event can yield a fluorescent phenotype. Here, we show that p53 status does not significantly affect spontaneous HR in adult pancreatic cells in vivo or in primary fibroblasts in vitro when assessed using the FYDR substrate and SCEs. In addition, primary fibroblasts from p53 null mice do not show increased susceptibility to DNA damage-induced HR when challenged with mitomycin C. Taken together, the FYDR direct repeat assay and SCE analysis indicate that, for some tissues and cell types, p53 status does not greatly impact HR.
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DOI:
10.1073/pnas.1232231100
发表时间:
2003-05-27
影响因子:
11.1
作者:
Hendricks, CA;Almeida, KH;Engelward, BP
通讯作者:
Engelward, BP
影响因子:
8
作者:
Janz, C;Wiesmüller, L
通讯作者:
Wiesmüller, L
DOI:
10.1073/pnas.90.1.297
发表时间:
1993-01-01
影响因子:
11.1
作者:
GONDO, Y;GARDNER, JM;BRILLIANT, MH
通讯作者:
BRILLIANT, MH
DOI:
10.1016/s0027-5107(96)00223-0
发表时间:
1997-03-04
影响因子:
2.3
作者:
Honma, M;Hayashi, M;Sofuni, T
通讯作者:
Sofuni, T
影响因子:
5.3
作者:
Dudenhöffer, C;Rohaly, G;Wiesmüller, L
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Wiesmüller, L