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Promoter and enhancer RNAs regulate chromatin reorganization and activation of miR-10b/HOXD locus and neoplastic transformation in glioma [4C-seq]

ABSTRACT: Promoter and enhancer RNAs regulate chromatin reorganization and activation of miR-10b/HOXD locus and neoplastic transformation in glioma [4C-seq]

PROVIDER: PRJNA676096 | ENA |

REPOSITORIES: ENA

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Promoter and enhancer RNAs regulate chromatin reorganization and activation of miR-10b/HOXD locus and neoplastic transformation in glioma [4C-seq]

Project description:Using a combination of chromatin capture techniques, ChIP-Seq, single-molecule in situ RNA analysis, and computational analysis of large-scale TCGA datasets, we identified an epigenetic mechanism underlying common activation of HOXD/miR-10b locus in otherwise highly heterogenous glioma brain tumors. We demonstrate for the first time that two remote lncRNAs, one associated with a genomic promoter and another with a newly identified enhancer, cooperatively shape the 3D chromatin structure and looping, leading to the activation of a large gene cluster (12 genes, 110 KB) that includes the regulatory miRNA essential for glioma survival. This work describes a new mechanism contributing to neoplastic transformation in gliomagenesis, and identifies new avenues for therapeutic interventions based on the promoter and enhancer associated regulatory transcripts.

2021-11-11 | GSE161256 | GEO

Promoter and enhancer RNAs regulate chromatin reorganization and activation of miR-10b/HOXD locus and neoplastic transformation in glioma [ChIP-seq]

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Promoter and enhancer RNAs regulate chromatin reorganization and activation of miR-10b/HOXD locus and neoplastic transformation in glioma

Project description:Promoter and enhancer RNAs regulate chromatin reorganization and activation of miR-10b/HOXD locus and neoplastic transformation in glioma

| PRJNA676045 | ENA

Promoter and enhancer RNAs regulate chromatin reorganization and activation of miR-10b/HOXD locus and neoplastic transformation in glioma [ChIP-seq]

Project description:Promoter and enhancer RNAs regulate chromatin reorganization and activation of miR-10b/HOXD locus and neoplastic transformation in glioma [ChIP-seq]

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Reorganization of HoxD regulatory landscapes during the evolution of a snake-like body plan (4C-seq)

Project description:While the vertebrate body plan is highly conserved amongst all species of this taxon, extreme variations thereof can be documented in snakes, which display both an absence of limbs and an unusually elongated trunk. As Hox genes are strong candidates both for the making and the evolution of this body plan, their comparative study in such a morphologically diverged group is informative regarding their potential causative importance in these processes. In this work we use an interspecies comparative approach where different aspects of regulation at the HoxD locus are investigated. We find that although spatial collinearity and associated epigenetic mark dynamics are conserved in the corn snake, other regulatory modalities have been largely restructured. A BAC transgenic approach indeed revealed that, while the majority of mesodermal enhancers in vertebrates appear to be mostly located outside of the cluster, the corn snake contains most mesodermal trunk enhancers within the HoxD cluster. We also find that, despite the absence of limbs and an altered Hoxd gene regulation in external genitalia, the bimodal chromatin structure at the corn snake HoxD locus is maintained. The analysis of particular enhancer sequences initially defined in the mouse and further isolated at the snake orthologous locus showed differences in their specificities for the limb and genital bud expression. Of particular interest, a snake counterpart of a mouse limb-only enhancer sequence evolved into a genital-only enhancer. Such a regulatory exaptation suggests that enhancer versatility may have been an important factor to accompany the transition towards the snake body plan. These results show that vertebrate morphological evolution is likely to have been associated with extensive reorganization at the HoxD regulatory landscapes while respecting a very conserved general regulatory framework.

2016-11-05 | GSE79045 | GEO

Promoter and enhancer RNAs regulate chromatin reorganization and activation of miR-10b/HOXD locus and neoplastic transformation in glioma

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

2021-11-11 | GSE161258 | GEO

Spatial organization of chromatin at the HoxD locus in developing caeca (4C-seq)

Project description:Hox genes are required for the development of the intestinal caecum, a major organ of species eating plants. We have analysed the transcriptional regulation of Hoxd genes in caecal buds and show that they are controlled by a series of enhancers located in a gene desert telomeric to the HoxD cluster. The start site of two neighboring and opposite long non-coding RNAs, Hotdog and Twin of Hotdog, specifically transcribed in the caecum, contacts the expressed Hoxd genes in the framework of a topological domain, a large domain of interactions, which ensures a robust transcription of these genes during caecum budding. We show that hedgehogs have kept this regulatory potential despite the absence of caecum, suggesting that these enhancers are used in other developmental situations. In this context, we discuss some striking similarities between the caecum and the limb buds, suggesting the implementation of a common budding tool-kit. Chromosome Conformation Capture (4C seq) at the HoxD locus in developing caeca at E13.5

2013-10-23 | E-GEOD-44360 | biostudies-arrayexpress

Reorganization of HoxD regulatory landscapes during the evolution of a snake-like body plan (ChIP-seq)

2016-11-05 | GSE79047 | GEO

Reorganization of HoxD regulatory landscapes during the evolution of a snake-like body plan (4C-seq)

Project description:Reorganization of HoxD regulatory landscapes during the evolution of a snake-like body plan (4C-seq)

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Spatial organization of chromatin at the HoxD locus in developing caeca (4C tiling chip)

Project description:Hox genes are required for the development of the intestinal caecum, a major organ of species eating plants. We have analysed the transcriptional regulation of Hoxd genes in caecal buds and show that they are controlled by a series of enhancers located in a gene desert telomeric to the HoxD cluster. The start site of two neighboring and opposite long non-coding RNAs, Hotdog and Twin of Hotdog, specifically transcribed in the caecum, contacts the expressed Hoxd genes in the framework of a topological domain, a large domain of interactions, which ensures a robust transcription of these genes during caecum budding. We show that hedgehogs have kept this regulatory potential despite the absence of caecum, suggesting that these enhancers are used in other developmental situations. In this context, we discuss some striking similarities between the caecum and the limb buds, suggesting the implementation of a common budding tool-kit. Chromosome Conformation Capture-on-chip analysis (4C) at the Hoxd locus in developing caeca at E13.5, Array data were quantile normalized within 4C/input replicate groups and scaled to medial feature intensity of 100 using TAS software (Affymetrix). For each genomic position, a data set was generated consisting of all (PM-MM) pairs mapping within a sliding window of 250 bp.

2013-10-23 | E-GEOD-44357 | biostudies-arrayexpress

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