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Learn MoreFusion proteins involving Nucleoporin 98 (NUP98) are recurrently found in Acute Myeloid Leukemia (AML) with poor prognosis. Lack of mechanistic insight into NUP98-fusion-dependent oncogenic transformation has precluded the identification of efficient targeting strategies. We reasoned that shared transcriptional programs of direct NUP98-fusion-protein-mediated gene control converge on actionable targets. To study the transcriptional regulation mediated by NUP98 fusion proteins we developed mouse models for regulatable expression of NUP98/NSD1, NUP98/JARID1A and NUP98/DDX10. Integration of transcriptional changes after oncogene shutdown in vivo with ChIP-seq data identified a common core of direct NUP98-fusion target genes in AML. Among the direct targets of all NUP98-fusions, the CDK6 (cyclin-dependent kinase 6) gene was highly expressed in mouse and human AML samples. CDK6 loss severely attenuated NUP98-fusion-driven leukemogenesis, and NUP98-fusion AML was hypersensitive to pharmacologic CDK6 inhibition in vitro and in vivo. These findings identify CDK6 as a conserved, critical direct target of NUP98-fusion proteins, proposing approved CDK4/CDK6 inhibitors as a rationale treatment option for AML patients with NUP98-fusions. SOURCE: Thomas Eder (Thomas.Eder@vetmeduni.ac.at) - Grebien Lab University of Veterinary Medicine, Vienna
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