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The Histone Methyltransferases MLL1 and DOT1L Cooperate with Meningioma-1 to Induce AML [Mouse Mll1 ko RNA-seq]

ABSTRACT: Purpose: To characterize transcriptional changes associated with homozygous inactivation of Dot1l or Mll1 in MN1 driven AML Methods: We sequenced mRNA from murine LSK-cells transformed using forced expression of MN1 (MSCV-MN1-IRES-GFP), and transduced with Cre-vector to inactivate either Dot1l or Mll1. Cells were sorted for Cre-expression (pTomato fluorescent marker) or expression of an inert control vector. Results: Inactivation of either Dot1l or Mll1 in this model leads to a substantial delay or complete abrogation of leukemia development.Loss of Dot1l or Mll1 are associated with gene expression changes that have substantial overlap. In addition, genes that are downregulated follwing inactivation of Dot1l or Mll1 have substantial overlap with the gene set upregulated in MN1 transduced CMPs. Conclusions: MN1 mediated leukemogenesis is associated with a gene expression program that dependes on Mll1 and Dot1l

ORGANISM(S): Mus musculus

PROVIDER: GSE76749 | GEO | 2016/01/12

SECONDARY ACCESSION(S): PRJNA308489

REPOSITORIES: GEO

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The Histone Methyltransferases MLL1 and DOT1L Cooperate with Meningioma-1 to Induce AML [Mouse Mll1 ko RNA-seq]

Project description:Purpose: To characterize transcriptional changes associated with homozygous inactivation of Dot1l or Mll1 in MN1 driven AML Methods: We sequenced mRNA from murine LSK-cells transformed using forced expression of MN1 (MSCV-MN1-IRES-GFP), and transduced with Cre-vector to inactivate either Dot1l or Mll1. Cells were sorted for Cre-expression (pTomato fluorescent marker) or expression of an inert control vector. Results: Inactivation of either Dot1l or Mll1 in this model leads to a substantial delay or complete abrogation of leukemia development.Loss of Dot1l or Mll1 are associated with gene expression changes that have substantial overlap. In addition, genes that are downregulated follwing inactivation of Dot1l or Mll1 have substantial overlap with the gene set upregulated in MN1 transduced CMPs. Conclusions: MN1 mediated leukemogenesis is associated with a gene expression program that dependes on Mll1 and Dot1l Examination of mRNA levels between Dot1l f/f and Dot1l ko, and Mll1 f/f and Mll1 ko.

2016-01-12 | E-GEOD-76749 | biostudies-arrayexpress

The Histone Methyltransferases MLL1 and DOT1L Cooperate with Meningioma-1 to Induce AML [Mouse Dot1l ko RNA-seq]

Project description:Purpose: To characterize transcriptional changes associated with homozygous inactivation of Dot1l or Mll1 in MN1 driven AML Methods: We sequenced mRNA from murine LSK-cells transformed using forced expression of MN1 (MSCV-MN1-IRES-GFP), and transduced with Cre-vector to inactivate either Dot1l or Mll1. Cells were sorted for Cre-expression (pTomato fluorescent marker) or expression of an inert control vector. Results: Inactivation of either Dot1l or Mll1 in this model leads to a substantial delay or complete abrogation of leukemia development. Loss of Dot1l or Mll1 are associated with gene expression changes that have substantial overlap. In addition, genes that are downregulated follwing inactivation of Dot1l or Mll1 have substantial overlap with the gene set upregulated in MN1 transduced CMPs. Conclusions: MN1 mediated leukemogenesis is associated with a gene expression program that dependes on Mll1 and Dot1l Examination of mRNA levels between Dot1l f/f and Dot1l ko, and Mll1 f/f and Mll1 ko.

2016-01-12 | E-GEOD-76748 | biostudies-arrayexpress

The Histone Methyltransferases MLL1 and DOT1L Cooperate with Meningioma-1 to Induce AML [Mouse Dot1l ko RNA-seq]

Project description:Purpose: To characterize transcriptional changes associated with homozygous inactivation of Dot1l or Mll1 in MN1 driven AML Methods: We sequenced mRNA from murine LSK-cells transformed using forced expression of MN1 (MSCV-MN1-IRES-GFP), and transduced with Cre-vector to inactivate either Dot1l or Mll1. Cells were sorted for Cre-expression (pTomato fluorescent marker) or expression of an inert control vector. Results: Inactivation of either Dot1l or Mll1 in this model leads to a substantial delay or complete abrogation of leukemia development. Loss of Dot1l or Mll1 are associated with gene expression changes that have substantial overlap. In addition, genes that are downregulated follwing inactivation of Dot1l or Mll1 have substantial overlap with the gene set upregulated in MN1 transduced CMPs. Conclusions: MN1 mediated leukemogenesis is associated with a gene expression program that dependes on Mll1 and Dot1l

2016-01-12 | GSE76748 | GEO

RNA-seq analysis of Men1-/- versus Men1wt MN1-driven AML

Project description:Purpose: To characterize transcriptional changes associated with homozygous inactivation of Men1 in MN1 driven AML Methods: In vivo MN1 transformed cells were transduced with Cre-vector to inactivate Men1 and injected into sublethially irradiated syngeneic recipients. Men1-/- and Men1wt MN1-driven leukemic cells were isolated from moribund recipients and plated in methylcellulose for 7 days before RNA was extracted. Results: Men1-/- MN1-driven leukemic cells failed to propagate leukemia in most secondary recipients, in comparison with Men1wt MN1-driven. In vitro, cells had lost their colony forming activity. Gene expression analysis revealed a downregulation of the MN1 leukemic expression program. Conclusions: Men1 regulates long term maintenance of MN1-driven leukemia.

2020-05-09 | GSE150151 | GEO

The Histone Methyltransferases MLL1 and DOT1L Cooperate with Meningioma-1 to Induce AML [Mouse ChIP-seq]

Project description:Purpose: To characterize the genome-wide distribution of H3K79me2 in murine MN1 driven myeloid leukemia Methods: We performed Chip-seq for the H3K79me2 in leukemias isolated from moribund mice that had been injected with common myeloid progenitors (CMPs) transduced with MSCV-MN1-GFP Results: H3K79me2 is enriched at key loci that 1. are bound by MN1 in the data set of Heuser et al, (Cancer Cell. 2011 Jul 12;20(1):39-52.), 2. upregulated upon transduction with MN1, and lose expression upon deletion of the H3K79 methyltransferase Dot1l. Conclusions: A leukemogenic program in MN1 leukemias is marked by H3K79me2 and dependent on this mark

2016-01-12 | GSE76746 | GEO

The Histone Methyltransferases MLL1 and DOT1L Cooperate with Meningioma-1 to Induce AML [Mouse ChIP-seq]

2016-01-12 | E-GEOD-76746 | biostudies-arrayexpress

Bone marrow-derived macrophage responses to classical activation: wild-type vs. MLL1-deficient (Lys2Cre MLL1 fx/fx)

Project description:mRNA from wild-type (Cre-) and MLL1-deficient (Cre+) BMDMs were analyzed via gene chip (Mouse Gene ST 2.1, Affymetrix) for relative expression changes. Isolated mRNA from Cre- and Cre+ BMDMs stimulated with classical activation signals (IFNg, LPS or IFNg+LPS) was analyzed using a gene chip panel of >40,000 RefSeq transcripts, and resulting fold expression was determined by analyzing quality-controlled expression values for validated probesets. Bone marrow derived macrophages from wild-type (Cre-) or MLL1-deficient (Cre+) mice were stimulated in vitro with IFNgamma (10 ng/ml), LPS (100 ng/ml) or the combination of IFNgamma+LPS for six hours. Cells were then processed in Trizol reagent for RNA extraction.

2016-06-02 | E-GEOD-82109 | biostudies-arrayexpress

Expression changes after loss of Dot1l in murine MLL-AF9 leukemia cells

Project description:MLL-fusions may induce leukemogenic gene expression programs by recruiting the histone H3K79 methyltransferase to MLL-target promoters. We evaluated gene expression changes after cre-mediated loss of Dot1l in leukemia cells obtained from mice injected with MLL-9 transformed lineage negative bone marrow cells. MLL-AF9 murine leukemia cells carrying two conditional Dot1l alleles were retrovirally transduced with Cre or empty control vector, and gene expression changes were monitored on day 3, 5, and 7 after transduction.

2011-09-12 | E-GEOD-25911 | biostudies-arrayexpress

Bone marrow-derived macrophage responses to classical activation: wild-type vs. MLL1-deficient (Lys2Cre MLL1 fx/fx)

2016-06-02 | GSE82109 | GEO

MLL1 and MLL fusion proteins play distinct roles in regulating MLLleukemic transcription program [ChIP-Seq]

Project description:This study describes the epigenetic profiling change of 1.) Mll1, WDR5 and H3K4me2 in mouse MAF9 leukemia cells treated with or without MM401; 2.) WDR5 and H3K4me2 epigenetic profiling in MLL1 flox/flox, ER-Cre+/- cells with knocking out MLL1 by 4OHT or not.

2016-05-12 | GSE68821 | GEO

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