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ASH2L mediates epidermal differentiation and hair follicle morphogenesis via the regulation of the Notch signaling pathway activity [CUT&Tag]

ABSTRACT: To elucidate the role of H3K4 methylation in epidermal development, we conditionally knocked out ASH2L, the core subunit of the COMPASS complex, in mouse epidermal progenitor (EP) cells. Then, we performed H3K4me3 modification profiling of FACS-sorted integrin α6-positive epidermal progenitor cells in P0 control mice (K14Cre,Ash2lF/+) by CUT&Tag-seq.

ORGANISM(S): Mus musculus

PROVIDER: GSE245773 | GEO | 2024/03/18

REPOSITORIES: GEO

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ASH2L mediates epidermal differentiation and hair follicle morphogenesis via the regulation of the Notch signaling pathway activity [RNA-Seq]

Project description:To elucidate the role of H3K4 methylation in epidermal development, we conditionally knocked out the core subunit ASH2L of the COMPASS complex in mouse epidermal progenitor cells (eps). Then, we performed RNA-seq analysis on FACS-classified integrin α6 positive epidermal progenitor cells from P0 control mice (K14Cre,Ash2lF/+) and cKO mice (K14Cre,Ash2lF/ F).

2024-03-18 | GSE245772 | GEO

ASH2L controls ureteric bud morphogenesis via regulation of RET/GFRA1 signaling activity [CUT&Tag]

Project description:To elucidate the role of H3K4 methylation in metanephros development, we selectively inactivated ASH2L, core subunit of the COMPASS complex in mice UB lineage. We then performed histone H3K4me3 modification landscape profiling of the control (Hoxb7Cre-GFP+,Ash2l F/+) and mutant (Hoxb7Cre-GFP+,Ash2l F/F) FACS-sorted UB lineage cells at E16.5 by CUT&Tag-seq.

2023-01-18 | GSE208273 | GEO

ASH2L controls ureteric bud morphogenesis via regulation of RET/GFRA1 signaling activity [RNA-seq]

Project description:To elucidate the role of H3K4 methylation in metanephros development, we selectively inactivated ASH2L, core subunit of the COMPASS complex in mice UB lineage. We then performed gene expression profiling analysis using data obtained from RNA-seq of 3 different FACS-sorted UB lineage cells at E16.5 of the control and cKO mouse embryos.

2023-01-18 | GSE208274 | GEO

COMPASS Family Histone Methyltransferase ASH2L Mediates Corticogenesis via Transcriptional Regulation of Wnt Signaling

Project description:This SuperSeries is composed of the SubSeries listed below Histone methylation is essential for regulating gene expression during organogenesis to maintain stem cells and execute a proper differentiation program for their descendants. Here, we show that the COMPASS family histone methyltransferase co-factor ASH2L is required for maintaining neural progenitor cells (NPCs) and the production and positioning of projection neurons during neocortex development. Specifically, loss of ASH2L in NPCs results in malformation of the neocortex; the mutant neocortex shows fewer neurons that are also abnormal in composition and laminar position. Moreover, ASH2L loss impairs the trimethylation of H3K4 and the transcriptional machinery specific for Wnt-β-catenin signaling, inhibiting the proliferation ability of NPCs at late stages of neurogenesis by disrupting S phase entry to inhibit cell cycle progression. Overexpressing β-catenin after ASH2L elimination rescues the proliferation deficiency. Therefore, our findings demonstrate ASH2L is crucial for modulating Wnt signaling to maintain NPCs and generate a full complement of neurons during mammalian neocortex development.

2019-07-16 | GSE120988 | GEO

METTL14-mediated N6-methyladenosine modification of Col17a1/Itgα6/Itgβ4 governs epidermal homeostasis [MeRIP-seq]

Project description:To elucidate the role of METTL14-mediated m6A modification in epidermal development, we conditionally knocked out the m6A methyltransferase METTL14 in mouse epidermal keratinocytes. We then performed MeRIP-seq analysis of epidermal keratinosis from P0 control mice (K14Cre,Mettl14F/+).

2023-12-31 | GSE246652 | GEO

Epigenetic-focused CRISPR/Cas9 screen identifies ASH2L as a regulator of glioblastoma cell survival

Project description:Glioblastoma is the most common and aggressive primary brain tumor with dismal prognosis, highlighting an urgent need for novel treatment strategies. In this study, we investigated epigenetic regulators of glioblastoma cell survival through CRISPR/Cas9 based genetic ablation screens using our customized sgRNA library EpiDoKOL, which targets critical functional domains of chromatin modifiers. Screens conducted in multiple cell lines revealed ASH2L, a histone lysine methyltransferase complex subunit, as a major regulator of glioblastoma cell viability. ASH2L depletion led to cell cycle arrest and apoptosis. RNA sequencing and Cut&Run sequencing together identified a set of cell cycle regulatory genes, such as TRA2B, BARD1, KIF20B, ARID4A, SMARCC1 that were downregulated upon ASH2L depletion. Mass spectrometry analysis demonstrated the interaction partners of ASH2L in glioblastoma cell lines as COMPASS family members including SETD1A, SETD1B, MLL1 and MLL2, however glioblastoma cells had differential dependency to COMPASS members for survival. The growth of ASH2L-depleted glioblastoma cells was markedly slower than controls in orthotopic in vivo models. TCGA analysis showed high ASH2L expression in glioblastoma compared to low grade gliomas and immunohistochemical analysis revealed significant ASH2L expression in glioblastoma tissues, attesting to its clinical relevance. Therefore, high throughput, robust and affordable screens with focused libraries, such as EpiDoKOL, holds great promise to enable rapid discovery of novel epigenetic regulators of cancer cell survival, such as ASH2L. Together, we suggest that targeting ASH2L could serve as a new therapeutic opportunity for glioblastoma.

2023-11-13 | GSE201657 | GEO

ASH2L, a COMPASS core subunit, is involved in the cell invasion and migration of triple-negative breast cancer cells through the epigenetic control of histone H3 lysine 4 methylation.

Project description:ASH2L (Absent-Small-Homeotic-2-Like protein) is a core subunit of the COMPASS (COMplex of Proteins ASsociated with Set1) complexes, the most notable writer of the methylation of histone H3 lysine 4 (H3K4). The COMPASS complex regulates active promoters or enhancers, and its dysfunction is associated with aberrant development and disease. Here, we demonstrated that ASH2L mediated the cell invasion and migration activity of triple-negative breast cancer cells through the interaction with the COMPASS components and the target genomic regions. Transcriptome analysis indicated a potential correlation between ASH2L and the genes involved in inflammatory/immune responses. Among them, we found that the intrinsic expression of IL1B (interleukin 1 beta), an essential proinflammatory gene, was directly regulated by ASH2L. These results revealed a novel role of ASH2L on the maintenance of breast cancer malignancy possibly through H3K4 methylation of the target inflammatory/immune responsive genes.

2023-06-09 | GSE228517 | GEO

Discrete chromatin alterations and deregulated gene expression upon PROTAC-induced rapid loss of the trithorax protein ASH2L [ChIP-seq(Ash2l)]

Project description:The trithorax protein ASH2L is essential for organismal and tissue development and for cell proliferation. ASH2L is a subunit of KMT2/COMPASS methyltransferase complexes that catalyze the methylation of histone H3 lysine 4 (H3K4). Tri- and mono-methylation of H3K4 (Ash2l and H3K4me1) are associated with active promoters and enhancers, respectively. The molecular relevance of these modifications is not fully understood. We have used mouse embryo cells with a PROTAC-sensitive, degradable ASH2L to assess the functional consequences of KMT2 complex inactivation. The rapid loss of ASH2L resulted in a sequential alterations of histone marks at promoters, first a decrease of Ash2l, then an increase of H3K4me1, and a decrease of H3K27ac during the first 16 hrs, while an increase in H3K27me3 was very slow. These consequences were most prominent at CpG island promoters within a window of ±1 kb of the transcription start sites. Despite the the rapid loss of ASH2L, the effect on transcription in the first 8 hrs was minimal. This was accompanied with an alterations in gene expression and associated proliferation stop and cell cycle arrest. These findings suggest an order series of events upon loss of ASH2L that requires considerable amount of time to unfold.

2023-09-12 | GSE241001 | GEO

COMPASS Family Histone Methyltransferase ASH2L Mediates Corticogenesis via Transcriptional Regulation of Wnt Signaling [ChIP-seq]

Project description:We show that the COMPASS family histone methyltransferase co-factor ASH2L is required in NPCs proliferation and upper layer cortical projection neurons production and position. Deletion of ASH2L impairs trimethylation of H3K4 and transcriptional machinery specifically for subsets of Wnt-β-catenin signaling, disrupting their transcription and consequently inhibiting the proliferation ability of NPCs in late stages of neurogenesis.

2019-07-16 | GSE120987 | GEO

COMPASS Family Histone Methyltransferase ASH2L Mediates Corticogenesis via Transcriptional Regulation of Wnt Signaling [RNA-seq]

2019-07-16 | GSE120986 | GEO

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