The RNA-binding zinc-finger protein tristetraprolin regulates AU-rich mRNAs involved in breast cancer-related processes.

The RNA-binding zinc-finger protein tristetraprolin regulates AU-rich mRNAs involved in breast cancer-related processes.
复制标题

RNA 结合锌指蛋白 tristetraprolin 调节参与乳腺癌相关过程的富含 AU 的 mRNA。

DOI:
10.1038/onc.2010.168
复制
发表时间:
2010-07-22
期刊:
影响因子:
8
通讯作者:
Khabar, K. S. A.
Khabar, K. S. A.
中科院分区:
医学1区
文献类型:
--
作者:
Al-Souhibani, N.;Al-Ahmadi, W.;Hesketh, J. E.;Blackshear, P. J.;Khabar, K. S. A.

文献摘要

参考文献

被引文献

相似文献

Tristetraprolin(TTP或ZFP36)是一种串联CCCH锌指的RNA结合蛋白,可调节某些富含AU的mRNA的稳定性,这表明TTP与正常细胞类型相比,TTP缺乏。与正常的乳腺细胞系相比,侵入性乳腺癌细胞(MDA-MB-231)较低,MCF12A和MCF-10使用新方法进行探测。通过表达与WT TTP相比,C124R Finger TTP突变体的作用,C124R TTP能够使用AS-Gene MicroArray cyply ttp。 ,鉴定出TTP调节的新靶标的是尿激酶纤溶酶原激活剂(UPA),UPA受体和基质金属蛋白酶1(MMP1)在肿瘤类型中扮演着突出的乳腺癌侵袭和这些靶标的表达。通过实时PCR评估的成纤维细胞,而TTP强迫恢复TTP导致其mRNA水平降低。但是,对于这些目标转录,TTP的c124r却减少了,而突变体C124R TTP则增加了融合到目标的报道构造的活性。 ,以3'UTR和依赖性方式调节与细胞生长,侵袭和转移有关的癌症相关基因的重要子集。
Tristetraprolin (TTP or ZFP36) is a tandem CCCH zinc finger RNA binding protein that regulates the stability of certain AU-rich mRNAs. Recent work suggests that TTP is deficient in cancer cells when compared to normal cell types. Here we found that TTP expression was lower in invasive breast cancer cells (MDA-MB-231) compared to normal breast cell lines, MCF12A and MCF-10. TTP targets were probed using a novel approach by expressing the C124R zinc finger TTP mutant that act as dominant negative and increase target mRNA expression. In contrast to wt TTP, C124R TTP was able to increase certain ARE-mRNA expression in serum-stimulated breast cancer cells. Using an ARE-gene microarray, novel targets of TTP regulation were identified; urokinase plasminogen activator (uPA), uPA receptor, and matrix metallo-proteinase-1 (MMP1), all known to play prominent roles in breast cancer invasion and metastasis. Expression of these targets was upregulated in the tumorigenic types, particularly, the highly invasive MDA-MB-231. The mRNA half lives of these TTP-regulated genes were increased in TTP-knockout embryonic mouse fibroblasts as assessed by real time PCR while forced restoration of TTP by transfection led to a reduction of their mRNA levels. RNA immunoprecipitation confirmed an association of TTP, but not C124R, with these target transcripts. Moreover, TTP reduced, while the mutant C124R TTP increased, the activity of reporter constructs fused to target ARE. As a result of TTP regulation, invasiveness of MDAMB231 cells was reduced. The data suggest that TTP, in a 3′UTR- and ARE-dependent manner, regulates an important subset of cancer-related genes that are involved in cellular growth, invasion, and metastasis.
DOI: 10.1074/jbc.m001696200
发表时间: 2000-06-09
影响因子: 4.8
作者:
Lai, WS;Carballo, E;Blackshear, PJ
通讯作者: Blackshear, PJ
DOI: 10.1038/sj.onc.1206862
发表时间: 2003-10-16
期刊: ONCOGENE
影响因子: 8
作者:
de Silanes, IL;Fan, JS;Gorospe, M
通讯作者: Gorospe, M
DOI: 10.1158/0008-5472.can-08-4238
发表时间: 2009-06-15
期刊: Cancer research
影响因子: 11.2
作者:
Brennan SE;Kuwano Y;Alkharouf N;Blackshear PJ;Gorospe M;Wilson GM
通讯作者: Wilson GM
DOI: 10.1074/jbc.m110395200
发表时间: 2002-03-15
影响因子: 4.8
作者:
Lai, WS;Kennington, EA;Blackshear, PJ
通讯作者: Blackshear, PJ
DOI: 10.1111/j.1349-7006.1996.tb00266.x
发表时间: 1996-06-01
期刊: JAPANESE JOURNAL OF CANCER RESEARCH
影响因子: --
作者:
Iwata, H;Kobayashi, S;Okada, Y
通讯作者: Okada, Y