Siah2-dependent concerted activity of HIF and FoxA2 regulates formation of neuroendocrine phenotype and neuroendocrine prostate tumors.

Siah2-dependent concerted activity of HIF and FoxA2 regulates formation of neuroendocrine phenotype and neuroendocrine prostate tumors.
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DOI:
10.1016/j.ccr.2010.05.024
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发表时间:
2010-07-13
期刊:
影响因子:
50.3
通讯作者:
Ronai ZA
Ronai ZA
中科院分区:
医学1区
文献类型:
--
作者:
Qi J;Nakayama K;Cardiff RD;Borowsky AD;Kaul K;Williams R;Krajewski S;Mercola D;Carpenter PM;Bowtell D;Ronai ZA

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神经内分泌(NE)表型,见于>30%的前列腺癌(PCa),NE前列腺肿瘤与侵袭性前列腺癌有关。TRAMP小鼠模型中NE前列腺肿瘤的形成在缺乏调节HIF-1α可用性的泛素连接酶Siah 2的小鼠中受到抑制。HIF-1α与NE组织中表达的转录因子FoxA 2之间的合作促进p300的募集,以反式激活选择的HIF调节基因Hes 6,Sox 9和Jmjd 1a。这些HIF调控的基因在转移性PCa中高度表达,并且是缺氧介导的NE表型、PCa转移和NE肿瘤形成所必需的。FoxA 2的组织特异性表达与Siah 2依赖性HIF-1α的可用性相结合,使得NE前列腺肿瘤发展和PCa中NE表型所需的转录程序成为可能。
Neuroendocrine (NE) phenotype, seen in >30% of prostate adenocarcinomas (PCa), and NE prostate tumors are implicated in aggressive prostate cancer. Formation of NE prostate tumors in the TRAMP mouse model was suppressed in mice lacking the ubiquitin ligase Siah2, which regulates HIF-1α availability. Cooperation between HIF-1α and FoxA2, a transcription factor expressed in NE tissue, promotes recruitment of p300 to transactivate select HIF-regulated genes, Hes6, Sox9 and Jmjd1a. These HIF-regulated genes are highly expressed in metastatic PCa and required for hypoxia-mediated NE phenotype, metastasis in PCa and the formation of NE tumors. Tissue-specific expression of FoxA2 combined with Siah2-dependent HIF-1α availability enables a transcriptional program required for NE prostate tumor development and NE phenotype in PCa.
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