PTEN regulation of ERK1/2 signaling in cancer.

PTEN regulation of ERK1/2 signaling in cancer.
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DOI:
10.3109/10799893.2012.695798
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发表时间:
2012-08
期刊:
Journal of receptor and signal transduction research
影响因子:
--
通讯作者:
Hinton CV
Hinton CV
中科院分区:
其他
文献类型:
--
作者:
Chetram MA;Hinton CV

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自发现以来,肿瘤抑制蛋白磷酸酶和张力蛋白同源物(PTEN)已成为一种具有广泛功能的分子,通常通过其脂质磷酸酶活性来调节;然而,PTEN也以不依赖磷酸酶的方式发挥作用。已充分确定,PTEN调节几种信号传导途径,例如磷酸肌醇3-激酶(PI 3 K)/蛋白激酶B(AKT)、janus激酶(JAK)/信号转导和转录激活因子(STAT)、粘着斑激酶(FAK)和最近的细胞外信号调节激酶(ERK)1/2,其中这些途径的激活通常导致癌症发展和进展。关于这些途径中的大多数,PTEN介导的调节的基本分子机制已经很好地建立,但对于ERK 1/2途径还没有那么多。事实上,越来越多的证据表明,在几种恶性肿瘤中,PTEN表达和ERK 1/2之间存在负相关。然而,PTEN调节ERK 1/2的详细机制知之甚少。在这篇综述中,我们讨论了PTEN在调节ERK 1/2的作用,直接针对shc/Raf/MEK和PI 3 K/AKT级联,以及两者之间的一个假定的串扰。
Since its discovery, the tumor suppressor phosphatase and tensin homolog (PTEN) has become a molecule with a wide spectrum of functions, which is typically meditated through its lipid phosphatase activity; however, PTEN also functions in a phosphatase-independent manner. It is well established that PTEN regulates several signaling pathways, such as phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT), janus kinase (JAK)/signal transducers and activators of transcription (STAT), focal adhesion kinase (FAK), and more recent, extracellular signal-regulated kinase (ERK)1/2, where activation of these pathways typically leads to cancer development and progression. In regard to most of these pathways, the underlining molecular mechanism of PTEN-mediated regulation is well established, but not so much for the ERK1/2 pathway. Indeed, accumulating evidence has shown an inverse correlation between PTEN expression and ERK1/2 in several malignancies. However, the detailed mechanism by which PTEN regulates ERK1/2 is poorly understood. In this review, we discuss the role of PTEN in regulating ERK1/2 by directly targeting shc/Raf/MEK and PI3K/AKT cascades, and a putative cross-talk between the two.
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