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Effective therapy of AML with RUNX1 mutation by co-treatment with inhibitors of protein translation and BCL2

ABSTRACT: Effective therapy of AML with RUNX1 mutation by co-treatment with inhibitors of protein translation and BCL2

PROVIDER: PRJNA754187 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15429300_1.fastq.gz	Fastqsanger.gz
	SRR15429300_2.fastq.gz	Fastqsanger.gz
	SRR15429301_1.fastq.gz	Fastqsanger.gz
	SRR15429301_2.fastq.gz	Fastqsanger.gz
	SRR15429302_1.fastq.gz	Fastqsanger.gz

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Effective therapy of AML with RUNX1 mutation by co-treatment with inhibitors of protein translation and BCL2 [scRNA-seq]

Project description:Majority of RUNX1 mutations in AML are missense or deletion-truncation and behave as loss-of-function mutations. Following standard therapy, AML patients expressing mtRUNX1 exhibit inferior clinical outcome than those without mutant RUNX1. Studies presented here demonstrate that as compared to AML cells lacking mtRUNX1, their isogenic counterparts harboring mtRUNX1 display impaired ribosomal biogenesis and differentiation, as well as exhibit reduced levels of wild-type RUNX1, PU.1 and c-Myc. Compared to AML cells with only wild-type RUNX1, AML cells expressing mtRUNX1 were also more sensitive to the protein translation inhibitor homoharringtonine (omacetaxine) and BCL2 inhibitor venetoclax. HHT treatment repressed enhancers and their BRD4 occupancy, as well as reduced levels of c-Myc, c-Myb, MCL1 and Bcl-xL. Consistent with this, co-treatment with omacetaxine and venetoclax or BET inhibitor induced synergistic in vitro lethality in AML expressing mtRUNX1. Compared to each agent alone, co-treatment with omacetaxine and venetoclax or BET inhibitor also displayed improved in vivo anti-AML efficacy, associated with improved survival of immune depleted mice engrafted with AML cells harboring mtRUNX1. These findings highlight superior efficacy of omacetaxine-based combination therapies for AML harboring mtRUNX1.

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Project description:The majority of RUNX1 mutations in acute myeloid leukemia (AML) are missense or deletion-truncation and behave as loss-of-function mutations. Following standard therapy, AML patients expressing mtRUNX1 exhibit inferior clinical outcome than those without mutant RUNX1. Studies presented here demonstrate that as compared with AML cells lacking mtRUNX1, their isogenic counterparts harboring mtRUNX1 display impaired ribosomal biogenesis and differentiation, as well as exhibit reduced levels of wild-type RUNX1, PU.1, and c-Myc. Compared with AML cells with only wild-type RUNX1, AML cells expressing mtRUNX1 were also more sensitive to the protein translation inhibitor homoharringtonine (omacetaxine) and BCL2 inhibitor venetoclax. Homoharringtonine treatment repressed enhancers and their BRD4 occupancy and was associated with reduced levels of c-Myc, c-Myb, MCL1, and Bcl-xL. Consistent with this, cotreatment with omacetaxine and venetoclax or BET inhibitor induced synergistic in vitro lethality in AML expressing mtRUNX1. Compared with each agent alone, cotreatment with omacetaxine and venetoclax or BET inhibitor also displayed improved in vivo anti-AML efficacy, associated with improved survival of immune-depleted mice engrafted with AML cells harboring mtRUNX1. These findings highlight superior efficacy of omacetaxine-based combination therapies for AML harboring mtRUNX1.

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