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.
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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
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发表时间:
2010-07-22
期刊:
影响因子:
8
通讯作者:
Khabar, K. S. A.
中科院分区:
文献类型:
--
作者:
Al-Souhibani, N.;Al-Ahmadi, W.;Hesketh, J. E.;Blackshear, P. J.;Khabar, K. S. A.
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.
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影响因子:
4.8
作者:
Lai, WS;Carballo, E;Blackshear, PJ
通讯作者:
Blackshear, PJ
影响因子:
8
作者:
de Silanes, IL;Fan, JS;Gorospe, M
通讯作者:
Gorospe, M
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
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