Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

MECOM is a master repressor of myeloid differentiation through dose control of CEBPA in acute myeloid leukemia [ATAC-seq]

ABSTRACT: The transcription factor MECOM, located at 3q26, is essential for hematopoietic stem cells (HSCs) in healthy individuals. Enhancer translocations, due to 3q26 rearrangements, drive out-of-context MECOM expression in an aggressive subtype of acute myeloid leukemia (AML). Aberrantly expressed MECOM is essential for the survival and immature phenotype of these leukemia cells. Direct depletion of MECOM using an endogenous auxin-inducible degron immediately upregulates expression of myeloid differentiation factor CEBPA. MECOM depletion is also accompanied by a severe loss of CD34 expression and gain of mature myeloid cell surface marker CD15. MECOM exerts its inhibitory effect on differentiation by binding to the +42kb CEBPA enhancer, which is required for neutrophil development. This is partially dependent on the interaction between MECOM and its essential co-repressor CTBP2, a potential target in this type of AML. We demonstrate that CEBPA overexpression can bypass the MECOM-mediated block of differentiation. In addition, AML patients with MECOM overexpression through enhancer hijacking show significantly reduced CEBPA. Our study provides insight into the mechanism by which MECOM maintains the stem cell state in AML. Furthermore, CEBPA levels are an important read-out for successful targeting of MECOM in 3q26-rearranged AML.

ORGANISM(S): Homo sapiens

PROVIDER: GSE285799 | GEO | 2025/02/01

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other
	GSE285799_RAW.tar	Raw
	filelist.txt	Txt

Items per page:

1 - 3 of 3

Similar Datasets

MECOM is a master repressor of myeloid differentiation through dose control of CEBPA in acute myeloid leukemia [4C-Seq]

Project description:The transcription factor MECOM, located at 3q26, is essential for hematopoietic stem cells (HSCs) in healthy individuals. Enhancer translocations, due to 3q26 rearrangements, drive out-of-context MECOM expression in an aggressive subtype of acute myeloid leukemia (AML). Aberrantly expressed MECOM is essential for the survival and immature phenotype of these leukemia cells. Direct depletion of MECOM using an endogenous auxin-inducible degron immediately upregulates expression of myeloid differentiation factor CEBPA. MECOM depletion is also accompanied by a severe loss of CD34 expression and gain of mature myeloid cell surface marker CD15. MECOM exerts its inhibitory effect on differentiation by binding to the +42kb CEBPA enhancer, which is required for neutrophil development. This is partially dependent on the interaction between MECOM and its essential co-repressor CTBP2, a potential target in this type of AML. We demonstrate that CEBPA overexpression can bypass the MECOM-mediated block of differentiation. In addition, AML patients with MECOM overexpression through enhancer hijacking show significantly reduced CEBPA. Our study provides insight into the mechanism by which MECOM maintains the stem cell state in AML. Furthermore, CEBPA levels are an important read-out for successful targeting of MECOM in 3q26-rearranged AML.

2025-02-01 | GSE285798 | GEO

MECOM is a master repressor of myeloid differentiation through dose control of CEBPA in acute myeloid leukemia [RNA-seq]

2025-02-01 | GSE286032 | GEO

MECOM is a master repressor of myeloid differentiation through dose control of CEBPA in acute myeloid leukemia [SLAM-seq]

2025-02-01 | GSE285803 | GEO

MECOM is a master repressor of myeloid differentiation through dose control of CEBPA in acute myeloid leukemia [ChIP-seq]

2025-02-01 | GSE285800 | GEO

Oncogene EVI1 Drives Acute Myeloid Leukemia Via a Targetable Interaction with CTBP2

Project description:Acute myeloid leukemia (AML) driven by the activation of EVI1 due to chromosome 3q26/MECOM rearrangements is incurable with current chemotherapy regimens. Insight into the mechanism by which EVI1 drives myeloid transformation is needed to target EVI1 in those leukemias. Here we demonstrate recurrent interaction of CTBP1/2 with a unique PLDLS motif in EVI1, which is indispensable for leukemic transformation of 3q26/MECOM rearranged AML. A PLDLS competitor construct outcompetes EVI1 to CTBP1/2 binding and inhibits AML proliferation in xenotransplant models. This proof-of-concept study opens the possibility to target one of the most incurable forms of AML using specific inhibitors directed to EVI1/CTBP1/2 interaction. Our findings have important implications for other tumour types with aberrant expression of EVI1 or other oncogenic transcription factors that also depend on CTBP1/2 interaction.

2023-07-13 | PXD043333 | Pride

Oncogene EVI1 Drives Acute Myeloid Leukemia Via a Targetable Interaction with CTBP2

2024-05-21 | PXD048760 | Pride

Atypical 3q26/MECOM rearrangements genocopy inv(3)/t(3;3) in acute myeloid leukemia

Project description:Acute myeloid leukemia (AML) with inv(3)/t(3;3)(q21q26) is a distinct WHO recognized entity, characterized by its aggressive course and poor prognosis. In this subtype of AML, the translocation of a GATA2 enhancer (3q21) to MECOM (3q26) results in overexpression of the MECOM isoform EVI1 and monoallelic expression of GATA2 from the unaffected allele. The full-length MECOM transcript, MDS1-EVI1, is not expressed as the result of the 3q26 rearrangement. Besides the classical inv(3)/t(3;3), a number of other 3q26/MECOM rearrangements with poor treatment response have been reported in AML. Here we demonstrate, in a group of 33 AML patients with atypical 3q26 rearrangements, MECOM involvement with EVI1 overexpression, but no or low MDS1-EVI1 levels. Moreover, the 3q26 translocations in these AML patients often involve super-enhancers of genes active in myeloid development (e.g. CD164, PROM1, CDK6 or MYC). In more than 50% of these cases allele specific GATA2 expression was observed, either by copy number loss or by an unexplained allelic imbalance. Altogether, atypical 3q26 recapitulate the main leukemic mechanism of inv(3)/t(3;3) AML, namely EVI1 overexpression driven by enhancer hijacking, absent MDS1-EVI1 expression and potential GATA2 involvement. Therefore, we conclude that both atypical 3q26/MECOM and inv(3)/t(3;3) can be classified as a single entity of 3q26-rearranged AMLs. Routine analyses determining MECOM rearrangements, EVI1 and MDS1-EVI1 expression are required to recognize 3q-rearranged AML cases.

| EGAS00001004325 | EGA

Oncogene EVI1 Drives Acute Myeloid Leukemia Via a Targetable Interaction with CTBP2 [RNA-seq]

2023-09-30 | GSE243620 | GEO

Oncogene EVI1 Drives Acute Myeloid Leukemia Via a Targetable Interaction with CTBP2 [ChIP-Seq]

2023-07-12 | GSE236010 | GEO

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.

2019-12-02 | GSE122161 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data