DNA repair efficiency in transgenic mice over expressing ribosomal protein S3.

DNA repair efficiency in transgenic mice over expressing ribosomal protein S3.
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DOI:
10.1016/j.mrfmmm.2009.03.005
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发表时间:
2009-06-18
影响因子:
2.3
通讯作者:
Deutsch, Walter A.
Deutsch, Walter A.
中科院分区:
医学4区
文献类型:
--
作者:
Hegde, Vijay;Yadavilli, Sridevi;McLaughlin, Leslie D.;Deutsch, Walter A.

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人核糖体蛋白S3(RPS 3)以前已被证明具有替代作用,而不是参与蛋白质合成。例如,我们的体外研究已经表明,RPS 3对7,8-二氢-8-氧代鸟嘌呤(8-oxoG)具有非常高的结合亲和力。值得注意的是,在暴露于氧化应激的细胞中,RPS 3易位到细胞核,在那里它与8-oxoG的病灶共定位。我们设计了过表达RPS 3的转基因小鼠,试图确定RPS 3易位在整个动物中的结果。从这些转基因小鼠中分离的小鼠胚胎成纤维细胞(MEF)显示出与野生型小鼠的MEF相比,暴露于氧化损伤的细胞中DNA损伤的积累增加。在暴露于氧化应激的MEF中,我们观察到RPS 3从细胞质易位到细胞核并共定位到8-oxoG焦点,这一观察结果可能涉及阻断该诱变基础的修复,从而解释了为什么暴露于氧化应激的转基因MEF具有更高水平的DNA损伤。
Human ribosomal protein S3 (RPS3) has previously been shown to have alternative roles beyond its participation in protein synthesis. For example, our in vitro studies have shown that RPS3 has an extraordinarily high binding affinity for 7, 8-dihydro-8-oxoguanine (8-oxoG). Notably, in cells exposed to oxidative stress RPS3 translocates to the nucleus where it co-localizes with foci of 8-oxoG. We have engineered transgenic mice over expressing RPS3 in an attempt to determine the outcome of RPS3 translocation in a whole animal. Mouse embryonic fibroblasts (MEF's) isolated from these transgenic mice showed an increased accumulation of DNA damage in cells exposed to oxidative damage when compared to MEF's from wild-type mice. In MEF's exposed to oxidative stress we observed the translocation of RPS3 from the cytoplasm to the nucleus and co-localizing to 8-oxoG foci, an observation that could involve the blocking of the repair of this mutagenic base and thereby explain why transgenic MEF's exposed to oxidative stress have higher levels of DNA damage.
DOI: 10.1016/j.dnarep.2006.04.001
发表时间: 2006-07-13
期刊: DNA REPAIR
影响因子: 3.8
作者:
Heyde, Vijay;Wanyb, Mu;Deutsch, Walter A.
通讯作者: Deutsch, Walter A.
DOI: 10.1016/j.dnarep.2007.04.009
发表时间: 2007-10-01
期刊: DNA REPAIR
影响因子: 3.8
作者:
Yadavilli, Sridevi;Hede, Vijay;Deutsch, Walter A.
通讯作者: Deutsch, Walter A.
DOI: 10.1021/bi049234b
发表时间: 2004-11-09
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Hegde, V;Wang, M;Deutsch, WA
通讯作者: Deutsch, WA
DOI: 10.1016/s0014-5793(04)00074-2
发表时间: 2004-02-27
期刊: FEBS LETTERS
影响因子: 3.5
作者:
Jang, CY;Lee, JY;Kim, J
通讯作者: Kim, J
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DOI: 10.1371/journal.pgen.0030056
发表时间: 2007-04-06
期刊: PLoS genetics
影响因子: 4.5
作者:
Curran SP;Ruvkun G
通讯作者: Ruvkun G