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DOT1L-mediated Murine Neuronal Differentiation associates with H3K79me2 Accumulation and preserves SOX2-Enhancer Accessibility

ABSTRACT: To study whether acute inhibition of DOT1L induces global chromatin states alterations, we profile and compare the transcriptome, chromatin accessibility and epigenome (H3K4me3, H3K4me1, H3K27ac, H3K27me3, H3K36me3, H3K9me3, H3K79me2) of mESC and ES-derived NPC, treated with DMSO or EPZ5676.

ORGANISM(S): Mus musculus

PROVIDER: GSE135318 | GEO | 2020/08/01

REPOSITORIES: GEO

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DOT1L-mediated murine neuronal differentiation associates with H3K79me2 accumulation and preserves SOX2-enhancer accessibility.

Project description:During neuronal differentiation, the transcriptional profile and the epigenetic context of neural committed cells is subject to significant rearrangements, but a systematic quantification of global histone modification changes is still missing. Here, we show that H3K79me2 increases and H3K27ac decreases globally during in-vitro neuronal differentiation of murine embryonic stem cells. DOT1L mediates all three degrees of methylation of H3K79 and its enzymatic activity is critical to modulate cellular differentiation and reprogramming. In this context, we find that inhibition of DOT1L in neural progenitor cells biases the transcriptional state towards neuronal differentiation, resulting in transcriptional upregulation of genes marked with H3K27me3 on the promoter region. We further show that DOT1L inhibition affects accessibility of SOX2-bound enhancers and impairs SOX2 binding in neural progenitors. Our work provides evidence that DOT1L activity gates differentiation of progenitors by allowing SOX2-dependent transcription of stemness programs.

| S-EPMC7562744 | biostudies-literature

DOT1L-mediated Murine Neuronal Differentiation associates with H3K79me2 Accumulation and preserves SOX2-Enhancer Accessibility

Project description:DOT1L-mediated Murine Neuronal Differentiation associates with H3K79me2 Accumulation and preserves SOX2-Enhancer Accessibility

| PRJNA558383 | ENA

Novel Inhibitors of the Histone-Methyltransferase DOT1L Show Potent Antileukemic Activity in Patient-derived Xenografts (ChIP-seq dataset)

Project description:using ChIP-seq we examined Chromatin occupancy of the MLL-fusion complex members Menin and DOT1L after treatment with DOT1L methyltransferase inhibitors EPZ5676 and the novel compounds "compound 10" and "compound 11" as well as with the Menin-inhibitor VTP50469 in MOLM13 cells. Furthermore we used ChiP-seq to quantify the loss of H3K79me2 (histone mark deposited by DOT1L) after treatment with the DOT1L inhibitors EPZ5676 and "compound 10" in MOLM13 and RS4,11 cells.

2020-06-01 | GSE149183 | GEO

Inhibition of DOT1L increases osteoclast fusion and resorption and aggravates bone loss

Project description:Osteoclasts are absorptive cells and play a critical role in homeostatic bone remodeling and pathological bone resorption. Emerging evidence suggests an important role for epigenetic regulation of osteoclastogenesis. In this study, we investigated the role of DOT1L, which regulates gene expression epigenetically by histone H3K79 methylation during osteoclast formation. DOT1L and H3K79me2 levels were upregulated during osteoclast differentiation. Small molecule inhibitor- (EPZ5676 or EPZ004777) or short hairpin RNA-mediated reduction in DOT1L expression promoted osteoclast differentiation and resorption. DOT1L inhibition also increased osteoclast area and accelerated bone mass reduction in a mouse ovariectomy (OVX) model of osteoporosis. DOT1L inhibitors did not alter osteoblast differentiation in vitro and in vivo. Proteomics data, together with bioinformatics analysis, revealed that DOT1L inhibition altered reactive oxygen species (ROS) generation, autophagy activation, and cell fusion-related protein expression. ROS generation increased, and autophagy activation and cell migration ability enhancement were verified subsequently by flow cytometry and transwell migration assays. DOT1L inhibition increased NFATc1 nuclear translocation and NF-κB activation and strengthend osteoclast fusion and expression of resorption-related protein CD9, and MMP9 in osteoclasts derived from RAW264.7. Our findings support a new mechanism of DOT1L-mediated H3K79me2 epigenetic regulation of osteoclast differentiation, implicating DOT1L as a new therapeutic target for osteoclast dysregulation-induced disease.

2018-01-24 | PXD006448 | Pride

RNAsequencing of DOT1L inhibitor EPZ5676 treated ALDH1+ and ALDH1- cell populations

Project description:Global gene expression profiles obtained after treating cells with DOT1L inhibitor, EPZ5676

2022-01-29 | GSE194434 | GEO

Folate deficiency reduced aberrant level of DOT1L-mediated histone H3K79 methylation causes disruptive SHH gene expression involved in neural tube defects

Project description:Neural tube defects (NTDs) are one of the most severe congenital abnormalities. Maternal folate deficiency could impact the occurrence of NTDs. Histone H3 methyltransferase disruptor of telomeric silencing 1-like (DOT1L) expression was significantly downregulated, and low levels of H3K79me2 were found in the corresponding NTDs samples with their maternal serum folate under low levels. Using ChIP-seq assays, we found that a decrease of H3K79me2 downregulates the expression of Shh and Sufu in mouse embryonic stem cells (mESC) under folate deficiency. Our results indicate that abnormal Shh and Sufu genes expression reduced by aberrant Dot1l-mediated H3K79me2 levels could be the cause of NTDs occurrence.

2023-07-25 | GSE238081 | GEO

H3K79me2 naïve and in vitro activated B cells

Project description:We studied the role of the histone methyltransferase DOT1L in B cell development and differentiation. H3K79me2 ChIP-sequencing data was generated from sorted B cells. This was compared to RNA-sequencing data from WT and Dot1L KO mice in order to study the link between H3K79me2 and transcription.

2020-11-19 | GSE138906 | GEO

Assesment of DOT1L direct targets via ChIP of H3K79me2 at E12.5 of mouse cortex

Project description:Cortical development is under control of transcriptional programs that are orchestrated by activation of key determinants such as transcription factors. But stable inheritance of temporo-spatial activity of factors influencing cell fate and regionalization in different layers is only partly understood. We report that chromatin methylation at H3K79 transmits cell fate and layering information from early to late progenitors. Activity of DOT1L, mediating H3K79 methylation, prevents premature cell cycle exit by increasing expression of genes regulating asymmetric cell division (Vangl2, Cenpj). Transcriptional programs characteristic for upper layer neurons are less active in Dot1l-deficient mice already at developmental stages that precede upper layer neuron generation. DOT1L activates expression of many key determinants such as Cux1, Cux2, Satb2 or Pou3f3. Additionally, DOT1L affects transcription of Sox family members, suggesting an evolutionary conserved mechanism. In part, DOT1L and H3K79me2 replace inactivating H3K9me3 at Sox family promoters and allow for transcriptional activation during neural differentiation.

2017-12-31 | GSE95831 | GEO

Expression profiling of WT and Dot1L KO CD8 effector T cells and H3K79me2 occupancy in WT effector CD8 T cells

Project description:We studied the role of the histone methyltransferase DOT1L in T cell development and differentiation. We generated RNA-seq data from sorted CD8 effector T cells from WT (Lck-cre+/-) and Dot1L KO (Lck-cre+/-;Dot1Lfl/fl) mice infected with Listeria monocytogenes. This data was compared with H3K79me2 ChIP-seq data from the same T cell subset.

2021-08-01 | GSE155406 | GEO

H3K79me2 and H3K4me3 in CD8 T cell subsets

Project description:We studied the role of the histone methyltransferase DOT1L in T cell development and differentiation. H3K79me2 and H3K4me3 ChIP-sequencing data was generated from sorted CD8 single positive thymocytes, naïve CD8 splenocytes and memory CD8 splenocytes. This was compared to RNA-sequencing data from WT and Dot1L KO mice in order to study the link between H3K79me2 and transcription.

2020-07-29 | GSE138908 | GEO

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