A Peroxidase Peroxiredoxin 1-Specific Redox Regulation of the Novel FOXO3 microRNA Target let-7.

A Peroxidase Peroxiredoxin 1-Specific Redox Regulation of the Novel FOXO3 microRNA Target let-7.
复制标题

DOI:
10.1089/ars.2016.6871
复制
发表时间:
2018-01-01
影响因子:
6.6
通讯作者:
Neumann CA
Neumann CA
中科院分区:
生物学2区
文献类型:
--
作者:
Hopkins BL;Nadler M;Skoko JJ;Bertomeu T;Pelosi A;Shafaei PM;Levine K;Schempf A;Pennarun B;Yang B;Datta D;Bucur O;Ndebele K;Oesterreich S;Yang D;Giulia Rizzo M;Khosravi-Far R;Neumann CA

文献摘要

参考文献

被引文献

相似文献

精确的氧化还原信号是通过翻译后的蛋白质修饰,如蛋白质硫醇的氧化而获得的。过氧化物酶过氧化物酶1 (PRDX1)通过改变其半胱氨酸的硫醇氧化来调节信号转导。我们在这里证明了PRDX1是肿瘤抑制转录因子FOXO3的结合伴侣,直接调节FOXO3的应激反应。氧化应激升高引起二硫结合异源三聚体的形成,将二聚体PRDX1连接到单体FOXO3。缺乏PRDX1增强FOXO3的核定位和转录,这依赖于FOXO3中Cys31或Cys150的存在。值得注意的是,FOXO3- t32的磷酸化在这些突变体中组成性增强,但突变体FOXO3的核易位通过PI3K抑制得以恢复。本研究表明,在H2O2暴露下,肿瘤抑制mirna let-7b和let-7c的转录受FOXO3或PRDX1表达水平的调控,而let-7c是FOXO3的新靶点。同时,抑制let-7 microrna会增加prdx1缺陷乳腺癌细胞中的let-7表型。总之,这些数据确定了h2o2敏感的PRDX1-FOXO3信号轴的存在,该信号轴在氧化应激反应中微调FOXO3活性,使其朝着基因目标的转录方向发展。Antioxid。氧化还原信号,28,62-77。
Precision in redox signaling is attained through posttranslational protein modifications such as oxidation of protein thiols. The peroxidase peroxiredoxin 1 (PRDX1) regulates signal transduction through changes in thiol oxidation of its cysteines. We demonstrate here that PRDX1 is a binding partner for the tumor suppressive transcription factor FOXO3 that directly regulates the FOXO3 stress response. Heightened oxidative stress evokes formation of disulfide-bound heterotrimers linking dimeric PRDX1 to monomeric FOXO3. Absence of PRDX1 enhances FOXO3 nuclear localization and transcription that are dependent on the presence of Cys31 or Cys150 within FOXO3. Notably, FOXO3-T32 phosphorylation is constitutively enhanced in these mutants, but nuclear translocation of mutant FOXO3 is restored with PI3K inhibition. Here we show that on H2O2 exposure, transcription of tumor suppressive miRNAs let-7b and let-7c is regulated by FOXO3 or PRDX1 expression levels and that let-7c is a novel target for FOXO3. Conjointly, inhibition of let-7 microRNAs increases let-7-phenotypes in PRDX1-deficient breast cancer cells. Altogether, these data ascertain the existence of an H2O2-sensitive PRDX1-FOXO3 signaling axis that fine tunes FOXO3 activity toward the transcription of gene targets in response to oxidative stress. Antioxid. Redox Signal. 28, 62–77.
DOI: 10.1111/j.1742-4658.2009.06985.x
发表时间: 2009-05
期刊: The FEBS journal
影响因子: --
作者:
Hall A;Karplus PA;Poole LB
通讯作者: Poole LB
DOI: 10.1016/s0092-8674(00)80595-4
发表时间: 1999-03-19
期刊: CELL
影响因子: 64.5
作者:
Brunet, A;Bonni, A;Greenberg, ME
通讯作者: Greenberg, ME
DOI: 10.1093/nar/gkv1120
发表时间: 2016-02-29
影响因子: 14.9
作者:
Chen X;Ji Z;Webber A;Sharrocks AD
通讯作者: Sharrocks AD
DOI: 10.3390/ijms141122202
发表时间: 2013-11-11
影响因子: 5.6
作者:
D'Ippolito E;Iorio MV
通讯作者: Iorio MV
DOI: 10.1186/bcr3236
发表时间: 2012-07-27
期刊: Breast cancer research : BCR
影响因子: --
作者:
Fredlund E;Staaf J;Rantala JK;Kallioniemi O;Borg A;Ringnér M
通讯作者: Ringnér M