RNA-binding proteins implicated in the hypoxic response.

RNA-binding proteins implicated in the hypoxic response.
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DOI:
10.1111/j.1582-4934.2009.00842.x
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发表时间:
2009-09
影响因子:
5.3
通讯作者:
Gorospe M
Gorospe M
中科院分区:
医学2区
文献类型:
--
作者:
Masuda K;Abdelmohsen K;Gorospe M

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在细胞对低氧水平的反应中,基因表达模式受到转录后过程的强烈影响。RNA结合蛋白(RBP)是响应包括缺氧在内的多种胁迫的基因表达的关键调节因子。在这里,我们审查的限制性商业惯例,调节mRNA的周转和翻译,以应对缺氧的挑战。RBP HuR(human antigen R)和PTB(polypyrimidine tract-binding protein)与编码低氧反应蛋白的mRNA(如HIF-1α和VEGF mRNA)相关,在低氧后增强其表达,并在建立低氧基因表达模式中起主要作用。其他RBP如铁反应元件结合蛋白(IRP)、胞质多聚腺苷酸化元件结合蛋白(CPEB)和几种异质核核糖核蛋白(hnRNP)也与低氧调节转录物结合,并调节编码蛋白的水平。我们讨论了RBP对缺氧基因表达的有效调控,以及在异常缺氧反应疾病中靶向缺氧调控RBP的日益增加的兴趣。
In cells responding to low oxygen levels, gene expression patterns are strongly influenced by post-transcriptional processes. RNA-binding proteins (RBPs) are pivotal regulators of gene expression in response to numerous stresses, including hypoxia. Here, we review the RBPs that modulate mRNA turnover and translation in response to hypoxic challenge. The RBPs HuR (human antigen R) and PTB (polypyrimidine tract-binding protein) associate with mRNAs encoding hypoxia-response proteins such as HIF-1α and VEGF mRNAs, enhance their expression after hypoxia and play a major role in establishing hypoxic gene expression patterns. Additional RBPs such as iron-response element-binding proteins (IRPs), cytoplasmic polyadenylation-element-binding proteins (CPEBs) and several heterogeneous nuclear ribonucleoproteins (hnRNPs) also bind to hypoxia-regulated transcripts and modulate the levels of the encoded proteins. We discuss the efficient regulation of hypoxic gene expression by RBPs and the mounting interest in targeting hypoxia-regulatory RBPs in diseases with aberrant hypoxic responses.
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