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Development of NUP98-HOXA9 gene expression signatures

ABSTRACT: To explore the molecular mechanisms induced by the leukemic fusion protein NUP98-HOXA9, we performed gene expression analysis of human hematopoietic progenitors and primary samples of patients that express NUP98-HOXA9. By combining these data with ChIP-seq results, we observed that the fusion protein is able to both activate and repress the expression of its target genes.

ORGANISM(S): Homo sapiens

PROVIDER: GSE62585 | GEO | 2016/12/31

SECONDARY ACCESSION(S): PRJNA264479

REPOSITORIES: GEO

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Evaluation of the NUP98-HOXA9 role as oncogenic transcription factor

Project description:To study the oncogenic mechanism triggered by the leukemic fusion protein NUP98-HOXA9, we cloned the cDNA of NUP98-HOXA9 into a retroviral vector (pMSCV-IRES-GFP) and efficiently transduced the HEK293FT human cell line. We performed a ChIP-seq analysis to identify the DNA binding sites of NUP98-HOXA9. These results allowed us to demonstrate that NUP98-HOXA9 regulates the expression of genes involved in the development of Acute Myeloid Leukemia by directly interacting with their enhancer regions. We further investigated the functional contribution to the DNA binding profile of the two moieties that compose the fusion protein. We cloned the coding region of HOXA9 wt and NUP98 wt in the same retroviral vector, established two new cellular models, 293FT-HOXA9 and 293FT-NUP98, and performed separate ChIP-seq analyses. We demonstrated that both moieties contribute importantly to the regulation of the target genes.

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MLL is essential for NUP98-HOXA9-induced leukemia

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Project description:RNA-seq of mouse hematopoietic stem and progenitor cells expressing NUP98-HOXA9 (NHX9) show upregulation of HOX and other NUP98 fusion target genes, but expression changes are dampened or lost with the introduction of mutations in NUP98's FG repeats or HOXA9's DNA binding domain

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Expression data from murine hematopoietic cells expressing BCR-ABL alone, NUP98-HOXA9 alone, BCR-ABL and NUP98-HOXA9, or null for both oncogenes

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