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Combined Inhibition of JAK/STAT Pathway and Lysine Demethylase 1 as a Novel Therapeutic Strategy in CSF3R/CEBPA Mutant Acute Myeloid Leukemia [LSD1i ChIP-seq]

ABSTRACT: The presence of CSF3R mutations are associated with adverse outcomes in CEBPA mutant AML. Here we report that inhibitors of LSD1 reverse the mutant CEBPA-mediated differentiation blockade and exhibit synergy with JAK/STAT inhibitors.

ORGANISM(S): Mus musculus

PROVIDER: GSE138387 | GEO | 2020/07/02

REPOSITORIES: GEO

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Combined Inhibition of JAK/STAT Pathway and Lysine Demethylase 1 as a Novel Therapeutic Strategy in CSF3R/CEBPA Mutant Acute Myeloid Leukemia [RUX_GSK RNA-seq]

Project description:The presence of CSF3R mutations are associated with adverse outcomes in CEBPA mutant AML. Here we report that inhibitors of LSD1 reverse the mutant CEBPA-mediated differentiation blockade and exhibit synergy with JAK/STAT inhibitors.

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Combined Inhibition of JAK/STAT Pathway and Lysine Demethylase 1 as a Novel Therapeutic Strategy in CSF3R/CEBPA Mutant Acute Myeloid Leukemia [LSD1i RNA-seq]

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CEBPA Dysfunction Intiates CSF3R Mutant Acute Myeloid Leukemia Through Disruption of Myeloid Lineage Enhancers (Microarray)

Project description:Acute Myeloid Leukemia (AML) develops due to the acquisition of mutations from multiple functional classes. Here, we demonstrate that activating mutations in the granulocyte colony stimulating factor receptor (CSF3R), cooperate with loss of function mutations in the transcription factor CEBPA to promote acute leukemia development. Terminal myeloid differentiation in response to granulocyte colony-stimulating factor signaling requires wild type CEBPA and is blocked by mutations in CEBPA. Inhibition of the histone demethylase LSD1, restores differentiation and in combination with JAK/STAT blockade, produces significant disease response in vivo. Mutant CEBPA blocks myeloid differentiation by preventing the activation of differentiation-associated enhancers. As enhancer activation precedes promoter activation, CEBPA mutations must occur prior to CSF3R mutations to effectively block differentiation and promote leukemia formation in vivo. This study demonstrates that order-dependent oncogene interaction is a fundamental process in AML. Dissecting this process is critical for understanding disease evolution to enable the development of effective therapeutics.

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Combined Inhibition of JAK/STAT Pathway and Lysine Demethylase 1 as a Novel Therapeutic Strategy in CSF3R/CEBPA Mutant Acute Myeloid Leukemia

Project description:Combined Inhibition of JAK/STAT Pathway and Lysine Demethylase 1 as a Novel Therapeutic Strategy in CSF3R/CEBPA Mutant Acute Myeloid Leukemia

| PRJNA575722 | ENA

Combined inhibition of JAK/STAT pathway and lysine-specific demethylase 1 as a therapeutic strategy in CSF3R/CEBPA mutant acute myeloid leukemia.

Project description:Acute myeloid leukemia (AML) is a deadly hematologic malignancy with poor prognosis, particularly in the elderly. Even among individuals with favorable-risk disease, approximately half will relapse with conventional therapy. In this clinical circumstance, the determinants of relapse are unclear, and there are no therapeutic interventions that can prevent recurrent disease. Mutations in the transcription factor CEBPA are associated with favorable risk in AML. However, mutations in the growth factor receptor CSF3R are commonly co-occurrent in CEBPA mutant AML and are associated with an increased risk of relapse. To develop therapeutic strategies for this disease subset, we performed medium-throughput drug screening on CEBPA/CSF3R mutant leukemia cells and identified sensitivity to inhibitors of lysine-specific demethylase 1 (LSD1). Treatment of CSF3R/CEBPA mutant leukemia cells with LSD1 inhibitors reactivates differentiation-associated enhancers driving immunophenotypic and morphologic differentiation. LSD1 inhibition is ineffective as monotherapy but demonstrates synergy with inhibitors of JAK/STAT signaling, doubling median survival in vivo. These results demonstrate that combined inhibition of JAK/STAT signaling and LSD1 is a promising therapeutic strategy for CEBPA/CSF3R mutant AML.

| S-EPMC7306806 | biostudies-literature

Combined Inhibition of JAK/STAT Pathway and Lysine Demethylase 1 as a Novel Therapeutic Strategy in CSF3R/CEBPA Mutant Acute Myeloid Leukemia [RUX_GSK RNA-seq]

Project description:Combined Inhibition of JAK/STAT Pathway and Lysine Demethylase 1 as a Novel Therapeutic Strategy in CSF3R/CEBPA Mutant Acute Myeloid Leukemia [RUX_GSK RNA-seq]

| PRJNA575725 | ENA

Combined Inhibition of JAK/STAT Pathway and Lysine Demethylase 1 as a Novel Therapeutic Strategy in CSF3R/CEBPA Mutant Acute Myeloid Leukemia [LSD1i RNA-seq]

Project description:Combined Inhibition of JAK/STAT Pathway and Lysine Demethylase 1 as a Novel Therapeutic Strategy in CSF3R/CEBPA Mutant Acute Myeloid Leukemia [LSD1i RNA-seq]

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