Misregulation of Rad50 expression in melanoma cells.

Misregulation of Rad50 expression in melanoma cells.
复制标题

DOI:
10.1111/j.1600-0560.2012.01915.x
复制
发表时间:
2012-07
影响因子:
1.7
通讯作者:
Cheung WL
Cheung WL
中科院分区:
医学4区
文献类型:
--
作者:
Avaritt NL;Owens R;Larson SK;Reynolds M;Byrum S;Hiatt KM;Smoller BR;Tackett AJ;Cheung WL

文献摘要

参考文献

被引文献

相似文献

通过组蛋白 H2AX 磷酸化检测到,人类黑色素瘤组织中 DNA 双链断裂增加。我们研究了 DNA 双链断裂的两个下游效应子 Rad50 和 53BP1(肿瘤抑制因子 p53 结合蛋白 1),以确定它们在人原代黑色素瘤细胞中是否发生改变。黑色素瘤病例表现出高 Rad50 染色 (81.8%; 9/11) 的频率明显高于传统或非典型黑素细胞痣 (0%; 0/18)。相比之下,黑色素瘤和痣之间 53BP1 的染色模式似乎相似。这是第一项证明人类黑色素瘤细胞中 DNA 修复途径的激活和失调的研究。 Rad50(DNA 双链断裂修复必需复合物的一个组成部分)的染色特征在黑色素瘤细胞中的染色强度和阳性黑色素瘤细胞数量均明显增加。有趣的是,在 Rad50 染色增加的黑色素瘤病例中,大多数表现出细胞质而非细胞核染色(88.9%,8/9)。需要进一步的研究来确定这种错误定位的原因及其对黑色素瘤 DNA 双链断裂修复的影响(如果有的话)。
DNA double-strand breaks are increased in human melanoma tissue as detected by histone H2AX phosphorylation. We investigated two of the downstream effectors of DNA double-strand breaks, Rad50 and 53BP1 (tumor suppressor p53 binding protein 1), to determine if they are altered in human primary melanoma cells. Melanoma cases demonstrated high Rad50 staining (81.8%; 9/11) significantly more frequently than conventional or atypical melanocytic nevi (0%; 0/18). In contrast, the staining pattern for 53BP1 appears similar between melanoma and nevi. This is the first study that demonstrates activation and misregulation of the DNA repair pathway in human melanoma cells. The staining features of Rad50, a component of an essential DNA double-strand break repair complex, are clearly increased in melanoma cells with regards to both staining intensity and the number of positive melanoma cells. Interestingly, among the melanoma cases with increased Rad50 staining, most demonstrated cytoplasmic rather than nuclear staining (88.9%, 8/9). Further studies are needed to determine the cause of this mislocalization and its affects, if any, on DNA double-strand break repair in melanoma.
DOI: 10.1038/nature05268
发表时间: 2006-11-30
期刊: NATURE
影响因子: 64.8
作者:
Bartkova, Jirina;Rezaei, Nousin;Gorgoulis, Vassilis G.
通讯作者: Gorgoulis, Vassilis G.
DOI: 10.1002/jcp.10475
发表时间: 2004-05-01
影响因子: 5.6
作者:
Seno, JD;Dynlacht, JR
通讯作者: Dynlacht, JR
DOI: 10.1016/j.humpath.2008.03.007
发表时间: 2008-11-01
期刊: HUMAN PATHOLOGY
影响因子: 3.3
作者:
Wasco, Matthew J.;Pu, Robert T.;Ma, Linglei
通讯作者: Ma, Linglei
DOI: 10.1038/85798
发表时间: 2001-03-01
期刊: NATURE GENETICS
影响因子: 30.8
作者:
Khanna, KK;Jackson, SP
通讯作者: Jackson, SP
DOI: 10.1038/nrm3047
发表时间: 2011-02
期刊: Nature reviews. Molecular cell biology
影响因子: --
作者:
通讯作者: --