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KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors (ATAC-Seq)

ABSTRACT: KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors (ATAC-Seq)

PROVIDER: PRJNA922153 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23024973_1.fastq.gz	Fastqsanger.gz
	SRR23024973_2.fastq.gz	Fastqsanger.gz
	SRR23024974_1.fastq.gz	Fastqsanger.gz
	SRR23024974_2.fastq.gz	Fastqsanger.gz
	SRR23024975_1.fastq.gz	Fastqsanger.gz

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KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors

Project description:KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors

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KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors (RNA-Seq)

Project description:KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors (RNA-Seq)

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KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors (ChIP-Seq)

Project description:KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors (ChIP-Seq)

| PRJNA922154 | ENA

KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors (ATAC-Seq)

Project description:The hippocampus plays major roles in learning and memory. Similar to other parts of the brain, the development of hippocampus requires precise coordination of patterning, cell proliferation, differentiation, and migration, with both cell-intrinsic and extrinsic mechanisms involved. Here we genetically removed the chromatin-association capability of KDM2B - a key component of the variant Polycomb repressive complex 1 (PRC1) - in the developing dorsal telencephalon (Kdm2bEmx1-∆CxxC) to surprisingly discover that the size of Kdm2bEmx1-∆CxxC hippocampus, particularly the dentate gyrus, became drastically smaller with disorganized cellular components and structure. Kdm2bEmx1-∆CxxC mice displayed prominent defects in spatial memory, motor learning and fear conditioning. The differentiation path of the developing Kdm2bEmx1-∆CxxC hippocampus was greatly delayed, with significant amount of TBR2-expressing intermediate progenitors being stuck along the migratory path. Transcriptome and chromatin immunoprecipitation studies of neonatal hippocampi and their progenitors indicated that genes implicated in stemness maintenance, especially components of canonical Wnt signaling, could not be properly silenced by PRC1 and PRC2. Activating Wnt signaling disturbed hippocampal neurogenesis, recapitulating the effect of KDM2B loss. Together, we unveiled a previously unappreciated gene repressive program mediated by KDM2B that controls progressive fate specifications and cell migration, hence morphogenesis of hippocampus during development.

2023-09-25 | GSE222462 | GEO

KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors (RNA-Seq)

2023-09-25 | GSE222464 | GEO

KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors (ChIP-Seq)

2023-09-25 | GSE222463 | GEO

KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors.

Project description:The hippocampus plays major roles in learning and memory, and its formation requires precise coordination of patterning, cell proliferation, differentiation, and migration. Here we removed the chromatin-association capability of KDM2B in the progenitors of developing dorsal telencephalon (Kdm2b∆CxxC) to discover that Kdm2b∆CxxC hippocampus, particularly the dentate gyrus, became drastically smaller with disorganized cellular components and structure. Kdm2b∆CxxC mice display prominent defects in spatial memory, motor learning and fear conditioning, resembling patients with KDM2B mutations. The migration and differentiation of neural progenitor cells is greatly impeded in the developing Kdm2b∆CxxC hippocampus. Mechanism studies reveal that Wnt signaling genes in developing Kdm2b∆CxxC hippocampi are de-repressed due to reduced enrichment of repressive histone marks by polycomb repressive complexes. Activating the Wnt signaling disturbs hippocampal neurogenesis, recapitulating the effect of KDM2B loss. Together, we unveil a previously unappreciated gene repressive program mediated by KDM2B that controls progressive fate specifications and cell migration, hence morphogenesis of the hippocampus.

| S-EPMC10576813 | biostudies-literature

KDM2B regulates hippocampal morphogenesis by transcriptionally silencing Wnt signaling in neural progenitors

Project description:This SuperSeries is composed of the SubSeries listed below.

2023-09-25 | GSE222465 | GEO

Silencing of KDM2B leads to deregulation of apoptosis related genes in GBM

Project description:Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) is a promising anti-cancer protein that can specifically kill tumor cells while sparing healthy ones. Emerging evidences suggest that TRAIL resistance in cancers is associated with aberrant expression of the key components of the apoptotic program. However, how these components are regulated at the epigenetic level is not understood. In this study, we aimed to identify novel epigenetic mechanisms regulating TRAIL response in Glioblastoma Multiforme (GBM) by a short-hairpin RNA (shRNA) screen. We employed an shRNA-mediated loss of function approach to interrogate the role of 48 genes in DNA and histone modification pathways. From this we identified KDM2B, an H3K36-specific demethylase, as a novel regulator of TRAIL response. Accordingly, silencing of KDM2B significantly enhanced TRAIL sensitivity, the activation of Caspase-8, Caspase-3, Caspase-7, and cleavage of PARP. KDM2B knockdown also accelerated the apoptosis process, as revealed by live cell imaging experiments. Moreover, simultaneous knockdown of the methyltransferases responsible for generating the histone marks removed by KDM2B significantly recovered the cell death phenotype observed with KDM2B inhibition. To decipher the downstream molecular pathways regulated by KDM2B, levels of apoptosis-related genes were examined by RNA-sequencing and quantitative PCR upon KDM2B loss, which revealed de-repression of pro-apoptotic genes HRK, caspase-7, and DR4 and repression of anti-apoptotic gene Mcl-1. The apoptosis phenotype was dependent on HRK upregulation, as HRK knockdown significantly abrogated the sensitization. In vivo, KDM2B-silenced tumors exhibited slower growth and reduced angiogenic capacity compared to controls. Taken together, our findings suggest a novel mechanism regulating apoptotic response, where the key apoptosis components are under epigenetic control of KDM2B in GBM cells.

2017-05-03 | GSE81043 | GEO

KDM2B is a Histone H3K79 Demethylase and Induces Transcriptional Repression via SIRT1-mediated Chromatin Silencing

Project description:The methylation of histone H3 lysine 79 (H3K79) acts as an active chromatin marker and is enriched in actively transcribed regions of the genome. However, demethylase of this mark remains unknown despite intensive research. Here, we show that KDM2B (FBXL10), a member of the Jumonji C (JmjC) family of proteins and previously known for its histone H3K36 demethylase activity, is a di- and trimethyl H3K79 demethylase. We demonstrate that KDM2B induces transcriptional repression of HOXA7 and MEIS1 via occupancy of promoters and demethylation of H3K79. Furthermore, genome-wide analysis suggests that H3K79 methylation levels are increased when KDM2B is depleted, suggesting that KDM2B functions as an H3K79 demethylase in vivo. Finally, stable KDM2B-knockdown cell lines exhibited displacement of SIRT1, with concomitant increases in H3K79 methylation and H4K16 acetylation. Our findings identify KDM2B as an H3K79 demethylase and link its function to transcriptional repression via SIRT1-mediated chromatin silencing.

2017-10-21 | GSE89052 | GEO

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