NUP98 Fusion Proteins Interact with the NSL and MLL1 Complexes to Drive Leukemogenesis.

NUP98 Fusion Proteins Interact with the NSL and MLL1 Complexes to Drive Leukemogenesis.
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DOI:
10.1016/j.ccell.2016.10.019
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发表时间:
2016-12-12
期刊:
影响因子:
50.3
通讯作者:
Armstrong SA
Armstrong SA
中科院分区:
医学1区
文献类型:
--
作者:
Xu H;Valerio DG;Eisold ME;Sinha A;Koche RP;Hu W;Chen CW;Chu SH;Brien GL;Park CY;Hsieh JJ;Ernst P;Armstrong SA

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核孔蛋白98基因(NUP 98)在多种造血系统恶性肿瘤中与多种伴侣基因融合。在这里,我们证明了NUP 98融合蛋白,包括NUP 98-HOXA 9(NHA 9)、NUP 98-HOXD 13(NHD 13)、NUP 98-NSD 1、NUP 98-PHF 23和NUP 98-TOP 1与混合谱系白血病1(MLL 1)和非特异性致死(NSL)组蛋白修饰复合物物理相互作用。ChIP-seq说明NHA 9和MLL 1共定位于染色质上,并且发现与Hox基因启动子区域相关。此外,MLL 1是体外和体内NHA 9细胞增殖所必需的。MLL 1的失活导致NHA 9和MLL 1结合的基因表达降低,并逆转NUP 98重排的人白血病中发现的基因表达特征。我们的数据揭示了在NUP 98融合驱动的白血病发生中对MLL 1功能的分子依赖性。Xu等人揭示了MLL 1在NUP 98融合白血病中的关键作用,并显示NUP 98融合蛋白与染色质上的MLL 1和NSL组蛋白修饰剂相互作用,以驱动对维持白血病重要的Hoxa和Hoxb簇基因的表达。
The Nucleoporin 98 gene (NUP98) is fused to a variety of partner genes in multiple hematopoietic malignancies. Here we demonstrate that NUP98 fusion proteins, including NUP98-HOXA9 (NHA9), NUP98-HOXD13 (NHD13), NUP98-NSD1, NUP98-PHF23, and NUP98-TOP1 physically interact with mixed lineage leukemia 1 (MLL1) and the non-specific lethal (NSL) histone-modifying complexes. ChIP-seq illustrates that NHA9 and MLL1 co-localize on chromatin and are found associated with Hox gene promoter regions. Furthermore, MLL1 is required for the proliferation of NHA9 cells in vitro and in vivo. Inactivation of MLL1 leads to decreased expression of genes bound by NHA9 and MLL1 and reverses a gene expression signature found in NUP98-rearranged human leukemias. Our data reveal a molecular dependency on MLL1 function in NUP98-fusion driven leukemogenesis. Xu et al. reveal a key role for MLL1 in NUP98 fusion leukemias and show that NUP98 fusion proteins interact with MLL1 and NSL histone modifiers on chromatin to drive expression of both Hoxa and Hoxb cluster genes important for sustaining leukemia.
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