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A4f81cc9-61ee-4973-af41-41944ce92deb - samples

ABSTRACT: Circle-seq data for 21 primary neuroblastoma samples supporting Koche et al. Extrachromosomal circular DNA drives oncogenic genome remodeling in neuroblastoma (2020).

PROVIDER: EGAD00001006580 | EGA |

REPOSITORIES: EGA

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7b47e76d-c1f5-447f-ae9d-a634b758e1d1 - samples

Project description:This dataset comprises Circle-seq data for 12 neuroblastoma cell lines supporting Koche et al. Extrachromosomal circular DNA drives oncogenic genome remodeling in neuroblastoma (2020).

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Project description:We generated Circle-seq data for primary neuroblastoma to describe the landscape of extrachromosomal circular DNA in neuroblastoma.

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Extrachromosomal circular SUZ12 amplicon dictates retinoblastoma progression through reprogramming H3K27 methylation [eccDNA-seq]

Project description:Extrachromosomal circular DNA (eccDNA) is double-stranded circular DNA that is derived from but independent of chromosomal DNA. Owing to its nonchromosomal inheritance, eccDNA facilitates the amplification of oncogenes and expedites the process of genome evolution in tumor. However, the role of eccDNA in RB remains enigmatic. We combined Circle-Seq and RNA-Seq to identified crucial extrachromosomal circular oncogene amplicons. Herein, we revealed that extrachromosomal circular SUZ12 amplicon regulates H3K27me3 modification during the oncogenic progression of retinoblastoma. Conclusively, our study initially delineated an integrated picture of the eccDNA landscape in retinoblastoma and unveiled a novel SUZ12-containing eccDNA/H3K27me3 oncogenic mechanism where eccDNA dictates retinoblastoma progression through regulating transcription levels of linear DNA.

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Circle-seq revealing eccDNA profiling of human bone marrow mesenchymal stem cells

Project description:Extrachromosomal circular DNAs (eccDNAs) have been discovered in various species and play a significant role in cancer development However, our understanding of eccDNAs in normal cells is limited. Here, we conducted eccDNA sequencing by Circle-seq in undifferentiated human bone marrow mesenchymal stem cells (uhBMSCs) and their differentiation into osteoblasts (OBs), chondrocytes (CCs), and adipocytes (ACs) to gain knowledge about eccDNAs in cell differentiation,

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Project description:Circle-Seq for extrachromosomal circular DNA in PLC-PRF-5 cells after treatment with 25OHD

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Extrachromosomal circular SUZ12 amplicon dictates retinoblastoma progression through reprogramming H3K27 methylation [CUT&Tag]

Project description:Extrachromosomal circular DNA (eccDNA) is double-stranded circular DNA that is derived from but independent of chromosomal DNA. Owing to its nonchromosomal inheritance, eccDNA facilitates the amplification of oncogenes and expedites the process of genome evolution in tumor. However, the role of eccDNA in RB remains enigmatic. Herein, we identified a set of SUZ12-containing eccDNAs in RB. Through multiomics analyses, we demonstrated that SUZ12 contributes to elevated levels of H3K27me3 modification and subsequently inhibits the transcription of KLF4 during the oncogenic progression of retinoblastoma. Conclusively, our study unveiled a novel SUZ12-containing eccDNA/H3K27me3 oncogenic mechanism where eccDNA dictates retinoblastoma progression through regulating transcription levels of linear DNA.

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Project description:Circular DNAs have been reported for decades and have been linked to tumorigenesis in humans. Previous sequencing-based genomic approaches capture circular DNA and average their readout over millions of cells, thereby losing insight into intercellular variation. Here, we introduce single-cell Circle-seq and show that the occurrence of most circular DNA species is stochastic, with some oncogene-containing large circular DNAs observed relatively frequently among different single cells. Despite this stochasticity, circular DNA is cell type-specific, which is concordant with H3K9me3 and H3K4me3 chromatin modification specificity of the corresponding cell lines. Moreover, we identify a cell type-specific circular DNA signature in cancer cells, which, we believe holds potential for early cancer diagnosis. In sum, our novel method single-cell Circle-seq dissects the randomness and cell type-specificity of circular DNAs at the single-cell level and uncovers the potential clinical application of circular DNA.

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