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Gene expression induced by DOT1L and Menin inhibition in cell line models of leukemia

ABSTRACT: Gene expression upon DOT1L inhibition, or Menin inhibition, or a combination of DOT1L and Menin inhibiting agents, was assessed in several MLL-rearranged human cell lines and a mouse model of MLL-AF9 leukemia. The goal of the study was to explore the mechanisms by which the EPZ0004777 and MI-2-2 chemicals collaborate to induce differentiation and cell death in MLL-AF4 and MLL-AF9 leukemias.

ORGANISM(S): Mus musculus Homo sapiens

PROVIDER: GSE63664 | GEO | 2016/11/14

SECONDARY ACCESSION(S): PRJNA268658

REPOSITORIES: GEO

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Chromatin state changes induced by targeted degradation of MLL-AF9 are phenocopied by combined DOT1L and MENIN inhibition. [ChIP-Seq]

Project description:Using ChIP-seq we examined the occupancy changes of various histone marks and chromatin-bound proteins following accute MLL-AF9 degradation in MLL-AF9-HA-FKPB12 transformed human (HCB1) cells. We also examined occupancy changes of various chromatin-bound proteins in human MLL-AF9-HA-FKBP12 transformed cells (HCB1) and MOLM13 cells in response to DOT1L inhibition, Menin-MLL inhibition, and the combination of DOT1L and Menin-MLL inhibition.

2022-03-03 | GSE173599 | GEO

Chromatin state changes induced by targeted degradation of MLL-AF9 are phenocopied by combined DOT1L and MENIN inhibition. [RNA-Seq]

Project description:Using RNA-seq we examined the transcriptional changes following MLL-AF9 degradation in MLL-AF9-HA-FKPB12 transformed murine (BM2222) and human (HCB1) cells. We also examined transcriptional changes in human MLL-AF9-HA-FKBP12 transformed cells (HCB1) and MOLM13 cells in response to DOT1L inhibition, Menin-MLL inhibition, and the combination of DOT1L and Menin-MLL inhibition. Lastly we assessed gene expression in murine neutrophils isolated directly from mice.

2022-03-03 | GSE173574 | GEO

Expression changes after Inhibition of AHD in Molm-13 cells

Project description:Formation of AF9/ENL/AF4/AFF4-containing super elongation complexes (SEC) and catalytic activity of DOT1L are required for MLL-rearranged leukemia. We evaluated gene expression changes after inhibition of AHD in leukemia cells.

2020-06-03 | GSE151660 | GEO

A novel Menin-MLL inhibitor induces specific chromatin changes and eradicates disease in models of MLL-rearranged leukemia [ChIP-seq]

Project description:Treatment of cells carrying MLL-rearrangements with VTP-50469 (specific Menin-MLL1 inhibitor) displaces Menin from high molecular weight complexes and chromatin genome-wide. Since VTP-50469 block Menin interaction with MLL1 we tested using chip-seq if treatment with VTP-50469 also displaces MLL1 or MLL-fusions from chromatin. We found that the VTP-50469 treatment displaced MLL-fusions from only a subset of MLL-fusion binding sites. Since DOT1L is associated with MLL-AF9 we then tested if displacement of MLL1 also leads to loss of DOT1L association with chromatin on MLL-AF9 binding sites. We found that DOT1L binds to thousands of genes, treatment with VTP-50469 leads to genome wide loss of DOT1L binding including the same subset of MLL-fusion binding sites.

2019-11-06 | GSE127507 | GEO

The MLL-AF9 and MLL-AF4 oncofusion proteins bind a distinct enhancer repertoire and target the RUNX1 program in MLLr AML

Project description:In MLL-rearranged (MLLr) leukemias the N terminal part of the MLL gene can be fused to over 60 different partner genes. Here, we investigate the genome wide binding of the MLL-AF9 and MLL-AF4 fusion proteins and their epigenetic signatures in order to define a core set of MLLr targets. We uncover both common as well as specific MLL-AF9 and MLL-AF4 target genes, which are all marked by H3K79me2, H3K27ac, and H3K4me3. Apart from promoter binding, we also identify MLL-AF9 and MLL-AF4 binding at specific subsets of non overlapping active distal regulatory elements. Despite this differential enhancer binding MLL-AF9 and MLL-AF4 still share a common gene program, which represents part of the RUNX1 gene program and constitutes of CD34+ and monocyte specific genes. Comparing these datasets revealed several zinc finger transcription factors as potential MLL-AF9 co-regulators. Together these results suggest that MLL-fusions collaborate with specific subsets of TFs to aberrantly regulate the RUNX1 gene program in 11q23 AMLs.

2017-01-24 | GSE79899 | GEO

RNA-seq analysis of murine KMT2A-MLLT3 with DOT1L overexpressed

Project description:We transduced two individual murine KMT2A-MLLT3 AML samples with DOT1L and three days after sorting for DOT1L+ cells collected for RNA-seq MLL-rearranged leukemias have been previously shown to be dependent on the presence of histone 3 lysine 79 (H3K79) dimethylation on the genomic targets of the fusion, and an inhibitor of the H3K79 methyltransferase DOT1L is in clinical trials for MLL-rearranged leukemia. In order to ask what biologic effects overexpression of DOT1L would have on the H3K79me2 ChIP-Seq profiles and MLL-fusion target gene expression, murine leukemias generated by transplanting MSCV-MLL-AF9-GFP transduced lin- cKit+ Sca1+ bone marrow cells were subjected to overexpression of DOT1L. Cells were sorted into low (low level of DOT1L overexpression), high (high level of DOT1L overexpression) and bulk (entire population) samples, and subjected to H3K79me2 ChIP-Seq (using a drosophila spike in for normalization) and RNA-Seq analysis 3 days after transduction.

2019-07-10 | GSE134035 | GEO

Degree of Recruitment of DOT1L to MLL-AF9 Defines Level of H3K79 Di- and Tri-methylation on Target Genes and Transformation Potential

Project description:The MLL gene is a common target of chromosomal translocations found in human leukemia. MLL-fusion leukemias are consistently poor prognosis. One of the most common translocation partners is AF9 (a.k.a. MLLT3). MLL-AF9 recruits DOT1L, a histone 3 lysine 79 methyltransferase (H3K79me1/me2/me3), leading to aberrant gene transcription. We show that DOT1L has three AF9 binding sites, and present the NMR solution structure of a DOT1L-AF9 complex. We generated structure-guided point mutations with graded effects on recruitment of DOT1L to MLL-AF9. ChIP-Seq analyses of H3K79me2 and H3K79me3 show that graded reduction of the DOT1L interaction with MLL-AF9 results in selective losses in H3K79me2 and me3 marks at MLL-AF9 target genes. Furthermore, the degree of DOT1L recruitment defines the level of MLL-AF9 hematopoietic transformation. Hematopoietic progenitor cells isolated from mouse bone marrow were transduced with retrovirus expressing either wildtype MLL-AF9 (WT), mutants, MLL-AF9 (D544R) and MLL-AF9 (D546R). ChIP-Seq analyses were performed on these wildtype and mutant cells using H3K79me2 and H3K79me3 antibodies. 3 samples corresponding to ChIP-Seq with H3K79me2 antibody: 1) MLL-AF9 (WT) 2) MLL-AF9 (D544R) 3) MLL-AF9 (D546R) 3 Samples Corresponding to ChIP-Seq with H3K79me3 antibody: 4) MLL-AF9 (WT) 5) MLL-AF9 (D544R) 6) MLL-AF9 (D546R)

2015-04-30 | E-GEOD-64365 | biostudies-arrayexpress

DOT1L Inhibits SIRT1 and SUV39H1-Mediated H3K9 Modification to Maintain Gene Expression (array)

Project description:Methylation of histone 3 on lysine 79 (H3K79) is broadly associated with active gene expression in eukaryotes, and the H3K79 methyltransferase DOT1L is indispensable for specific leukemia subtypes like those with MLL-translocations. We found that suppression of the histone deacetylase SIRT1 rescued MLL-AF9 leukemia cells from their dependence on DOT1L. We show that upon DOT1L inhibition, SIRT1 is required for the acquisition of a repressive chromatin state consistent with facultative heterochromatin around MLL-AF9 target genes in leukemia and other genes possess an H3K79me2(hi), H3K9ac(hi), H3K9me2(low) histone modification profile in normal hematopoietic stem and progenitor cells. Examination of gene expression dynamics with and without drug treatment and RNA interference.

2015-03-30 | E-GEOD-61013 | biostudies-arrayexpress

DOT1L Inhibits SIRT1 and SUV39H1-Mediated H3K9 Modification to Maintain Gene Expression (ATACseq)

Project description:Methylation of histone 3 on lysine 79 (H3K79) is broadly associated with active gene expression in eukaryotes, and the H3K79 methyltransferase DOT1L is indispensable for specific leukemia subtypes like those with MLL-translocations. We found that suppression of the histone deacetylase SIRT1 rescued MLL-AF9 leukemia cells from their dependence on DOT1L. We show that upon DOT1L inhibition, SIRT1 is required for the acquisition of a repressive chromatin state consistent with facultative heterochromatin around MLL-AF9 target genes in leukemia and other genes possess an H3K79me2(hi), H3K9ac(hi), H3K9me2(low) histone modification profile in normal hematopoietic stem and progenitor cells. Examination of histone modifications and a chromatin modifier with and without drug treatment and RNA interference.

2015-03-30 | E-GEOD-61016 | biostudies-arrayexpress

DOT1L Inhibits SIRT1 and SUV39H1-Mediated H3K9 Modification to Maintain Gene Expression (ChIPseq)

Project description:Methylation of histone 3 on lysine 79 (H3K79) is broadly associated with active gene expression in eukaryotes, and the H3K79 methyltransferase DOT1L is indispensable for specific leukemia subtypes like those with MLL-translocations. We found that suppression of the histone deacetylase SIRT1 rescued MLL-AF9 leukemia cells from their dependence on DOT1L. We show that upon DOT1L inhibition, SIRT1 is required for the acquisition of a repressive chromatin state consistent with facultative heterochromatin around MLL-AF9 target genes in leukemia and other genes possess an H3K79me2(hi), H3K9ac(hi), H3K9me2(low) histone modification profile in normal hematopoietic stem and progenitor cells. Examination of histone modifications and a chromatin modifier with and without drug treatment and RNA interference.

2015-03-30 | E-GEOD-61021 | biostudies-arrayexpress

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