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Tumor suppressor role of Ezh2 in an NRASQ61K driven model of Early T-cell Precursor Acute Lymphoblastic Leukemia

ABSTRACT: Tumor suppressor role of Ezh2 in an NRASQ61K driven model of Early T-cell Precursor Acute Lymphoblastic Leukemia

PROVIDER: PRJNA308125 | ENA |

REPOSITORIES: ENA

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Tumor suppressor role of Ezh2 in an NRASQ61K driven model of Early T-cell Precursor Acute Lymphoblastic Leukemia (RNA-Seq)

Project description:Purpose: To characterize transcriptional changes associated with homozygous inactivation the Polycomb Repressive Complex 2 (PRC2) lysine methyltransferase Ezh2 in a mouse model of earlt T-cell precursor ALL (ETP-ALL) Methods: We sequenced mRNA from NRASQ61K transformed murine LSK-cells co-transduced with a self-inactivating Cre-vector. Cells were sorted for Cre-expression (lox-stop-loxRosa26-YFP) or expression of an inert control vector (GFP) and differentiated on OP9DL1 stroma with and without a functional Ezh2 gene. Results: Inactivation of Ezh2 in this model leads to accelerated leukemia development. Resulting gene expression changes are complex and include enrichment of genes associated with immature hematopoietic cells, Ras signaling and Cytokines and their cognate receptors. Conclusions: Inactivation of Ezh2 in our model leads to accentuated expression of early hematopoietic gene expression programs and to accentuated growth and survival signaling. Examination of mRNA levels between Ezh2ff and Ezh2ko in vivo, Ezh2ff and Ezh2ko in vitro.

2016-01-07 | E-GEOD-76602 | biostudies-arrayexpress

Tumor suppressor role of Ezh2 in an NRASQ61K driven model of Early T-cell Precursor Acute Lymphoblastic Leukemia (ChIP-Seq)

Project description:Purpose: To characterize changes in genome-wide H3K27me3 associated with homozygous inactivation the Polycomb Repressive Complex 2 (PRC2) lysine methyltransferase Ezh2 in a mouse model of earlt T-cell precursor ALL (ETP-ALL) Methods: We performed Chip-seq for the H3K27me3 Chromatin mark on Ezh2ff and Ezh2ko cells NRASQ61K leukemias. Results: Inactivation of Ezh2 in this model leads to accelerated leukemia development. Resulting gene expression changes are complex and include enrichment of genes associated with immature hematopoietic cells, Ras signaling and Cytokines and their cognate receptors. Genes that lose K27me3 in Ezh2ko vs. Ezh2ff cells (ChIP-Seq) are enriched by GSEA in Ezh2ko vs Ezh2ff cells. Conclusions: Inactivation of Ezh2 in our model leads to accentuated expression of early hematopoietic gene expression programs, to accentuated growth and survival signaling and to transcriptonal enrichment of PRC2 targets. ChIP-Seq for H3K27me3 using Ezh2ff and Ezh2ko NRASQ61K leukemias harvested from leukemic mice and expanded on OP9DL1 cells.

2016-01-07 | E-GEOD-76601 | biostudies-arrayexpress

Tumor suppressor role of Ezh2 in an NRASQ61K driven model of Early T-cell Precursor Acute Lymphoblastic Leukemia (RNA-Seq)

2016-01-07 | GSE76602 | GEO

Tumor suppressor role of Ezh2 in an NRASQ61K driven model of Early T-cell Precursor Acute Lymphoblastic Leukemia (ChIP-Seq)

2016-01-07 | GSE76601 | GEO

Unique long non-coding RNA expression signature in ETV6/RUNX1-driven B-cell precursor acute lymphoblastic leukemia

Project description:Unique long non-coding RNA expression signature in ETV6/RUNX1-driven B-cell precursor acute lymphoblastic leukemia

| PRJNA317293 | ENA

Tumor suppressor role of Ezh2 in an NRASQ61K driven model of Early T-cell Precursor Acute Lymphoblastic Leukemia

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2016-01-07 | E-GEOD-76603 | biostudies-arrayexpress

The tumor suppressor gene rap1GAP is silenced by mir-101-mediated EZH2 overexpression in invasive squamous cell carcinoma

Project description:Rap1GAP is a critical tumor suppressor gene that is down-regulated in multiple aggressive cancers such as head and neck squamous cell carcinoma, melanoma and pancreatic cancer. However, the mechanistic basis of rap1GAP down-regulation in cancers is poorly understood. By employing an integrative approach, we demonstrate polycomb-mediated repression of rap1GAP that involves EZH2, a histone methyltransferase in head and neck cancers. We further concomitant down-regulation of rap1GAP in head and neck cancers. EZH2 represses rap1GAP by facilitating the trimethylation of H3K27, a mark of gene repression, and also hypermethylation of rap1GAP promoter. These results provide a conceptual framework involving a microRNA-oncogene-tumor suppressor axis to understand head and neck cancer progression. OSCC3-siRNA Non-Targeting Vs. siRNA EZH2 with dye-swap, HOK-Adeno CMV Vs. Adeno EZH2.

2011-11-02 | E-GEOD-28501 | biostudies-arrayexpress

Human B-cell precursor acute lymphoblastic leukemia cells overexpressing ST6Gal1

Project description:Human B-cell precursor acute lymphoblastic leukemia cells overexpressing ST6Gal1

| PRJNA770077 | ENA

EZH2 depletion potentiates MYC degradation inhibiting neuroblastoma and small cell carcinoma tumor formation

Project description:Efforts to therapeutically target EZH2 have generally focused on inhibition of its methyltransferase activity, although it remains less clear whether this is the central mechanism whereby EZH2 promotes cancer. We demonstrate that EZH2 directly interacts with both MYC family oncoproteins, MYC and MYCN, and promotes their stabilization in a methyltransferase-independent manner. By competing against the SCFFBW7 ubiquitin ligase to bind MYC and MYCN, EZH2 counteracted FBW7-mediated MYC(N) polyubiquitination and proteasomal degradation. Depletion, but not enzymatic inhibition, of EZH2 induced robust MYC(N) degradation and inhibited tumor cell growth in MYC(N) driven neuroblastoma and small cell lung cancer. These findings unveil the MYC family proteins as global EZH2 oncogenic effectors and EZH2 pharmacologic degraders as potential MYC(N) targeted cancer therapeutics, pointing out that MYC(N) driven cancers may develop inherent resistance to the canonical EZH2 enzymatic inhibitors currently in clinical development.

2022-02-17 | PXD029652 | Pride

The regulatory roles of Ezh2 in response to lipopolysaccharide (LPS) in macrophages and mice with conditional Ezh2 deletion with LysM-Cre system

Project description:The responses of macrophages to lipopolysaccharide (LPS) might determine the direction of clinical manifestations of sepsis, which is the immune response against severe infection. Meanwhile, the enhancer of zeste homologue 2 (Ezh2), a histone lysine methyltransferase of epigenetic regulation, might interfere with LPS response. With a single LPS stimulation, Ezh2 null(Ezh2flox/flox; LysM-Crecre/−) macrophages demonstrated lower supernatant TNF-α than Ezh2 control (Ezh2fl/fl; LysM-Cre−/−), perhaps due to an upregulation of Socs3, which is a suppressor of cytokine signaling 3, due to the loss of the Ezh2 gene. In LPS tolerance, Ezh2 null macrophages indicated higher supernatant TNF-α and IL-6 than the control, supporting an impact of the loss of the Ezh2 inhibitory gene. In parallel, Ezh2 null mice demonstrated lower serum TNF-α and IL-6 than the control mice after an LPS injection, indicating a less severe LPS-induced hyper-inflammation in Ezh2 null mice. In conclusion, an absence of Ezh2 in macrophages resulted in less severe LPS-induced inflammation, as indicated by low serum cytokines, with less severe LPS tolerance, as demonstrated by higher cytokine production, partly through the upregulated Socs3.

2023-07-20 | PXD041265 | Pride

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