GSK-3 promotes conditional association of CREB and its coactivators with MEIS1 to facilitate HOX-mediated transcription and oncogenesis.

GSK-3 promotes conditional association of CREB and its coactivators with MEIS1 to facilitate HOX-mediated transcription and oncogenesis.
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DOI:
10.1016/j.ccr.2010.04.024
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发表时间:
2010-06-15
期刊:
影响因子:
50.3
通讯作者:
Cleary ML
Cleary ML
中科院分区:
医学1区
文献类型:
--
作者:
Wang Z;Iwasaki M;Ficara F;Lin C;Matheny C;Wong SH;Smith KS;Cleary ML

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由MLL嵌合癌蛋白诱导的急性白血病是以持续增殖对GSK-3激酶活性的矛盾依赖性为特征的癌症亚组之一。我们在这里证明,GSK-3通过促进CREB及其共激活因子TORC和CBP与homedomain蛋白MEIS 1(MLL下属程序的关键组成部分)的条件性关联来维持MLL白血病干细胞转录程序,这反过来又促进HOX介导的转录和转化。这种机制也适用于由其他HOX基因转化的造血细胞,包括在大多数急性髓性白血病中高度表达的CDX 2,从而提供了一种基于GSK-3抑制策略的分子方法,以靶向广谱白血病中的HOX相关转录。
Acute leukemias induced by MLL chimeric oncoproteins are among the subset of cancers distinguished by a paradoxical dependence on GSK-3 kinase activity for sustained proliferation. We demonstrate here that GSK-3 maintains the MLL leukemia stem cell transcriptional program by promoting the conditional association of CREB and its co-activators TORC and CBP with homedomain protein MEIS1, a critical component of the MLL-subordinate program, which in turn facilitates HOX-mediated transcription and transformation. This mechanism also applies to hematopoietic cells transformed by other HOX genes, including CDX2, which is highly expressed in a majority of acute myeloid leukemias, thus providing a molecular approach based on GSK-3 inhibitory strategies to target HOX-associated transcription in a broad spectrum of leukemias.
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