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

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

PROVIDER: PRJNA987988 | ENA |

REPOSITORIES: ENA

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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.

2023-07-02 | GSE235888 | GEO

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.

2023-08-05 | GSE239785 | GEO

Extrachromosomal circular SUZ12 amplicon dictates retinoblastoma progression through reprogramming H3K27 methylation [RNA-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. 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.

2023-07-02 | GSE235887 | GEO

Extrachromosomal circular SUZ12 amplicon dictates retinoblastoma progression through reprogramming H3K27 methylation

Project description:Extrachromosomal circular SUZ12 amplicon dictates retinoblastoma progression through reprogramming H3K27 methylation

| PRJNA987978 | ENA

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

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

| PRJNA1000961 | ENA

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

Project description:Extrachromosomal circular SUZ12 amplicon dictates retinoblastoma progression through reprogramming H3K27 methylation [RNA-seq]

| PRJNA987987 | ENA

Whole-genome sequencing of Extrachromosomal circular DNA (eccDNA) of cerebrospinal fluid of Medulloblastoma

Project description:Background: Medulloblastoma (MB) is one of the malignant tumors of the central nervous system (CNS) with a poor prognosis and lack of effective detection. Extrachromosomal circular DNA (eccDNA) has been reported to be closely related to CNS tumors. However, there is still a gap in eccDNA of MB.Methods: Genomic features of eccDNAs were identified in MB tissues and matched cerebrospinal fluid (CSF) using a circle-map, compared with normal. The nucleotides on both sides of the eccDNAs breakpoint were analyzed to investigate the mechanisms of eccDNAs formation. Bioinformatics analysis combined with the GEO database identified reliable features of eccDNA-related genes in MB. Lasso Cox regression model, univariate and multivariate Cox regression analysis, time-dependent ROC, and Kaplan–Meier curve were used to assess the potential diagnostic and prognostic value of the Hub genes.Results: 35179 eccDNAs were identified, with the majority less than 1000 base pairs (bp). The distribution of eccDNAs on the genome was closely related to gene density. EccDNAs in CSF exhibited phase parallelism with matched MB tissues and were shown differently in tumors and normal. Ten core genes were identified in combination with GEO and showed reliable diagnostic and prognostic value in independent datasets through univariate and multivariate Cox regression. Nomogram included Hub-gene signatures was established and showed clinical benefit.Conclusions: This study described the characteristics and formation mechanism of eccDNAs in MB and CSF. The role of eccDNA in MB was revealed, and eccDNA-associated hub genes in CSF could be used as diagnostic and prognostic biomarkers for MB.

2022-10-20 | GSE205178 | GEO

Extrachromosomal circular SUZ12 amplicon dictates retinoblastoma progression through reprogramming H3K27 methylation

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

2023-07-02 | GSE235889 | GEO

Transcription-induced formation of extrachromosomal DNA during yeast ageing

Project description:Extrachromosomal circular DNA (eccDNA) facilitates adaptive evolution by allowing rapid and extensive gene copy number variation, and is implicated in the pathology of cancer and ageing. Here, we demonstrate that yeast aged under environmental copper accumulate high levels of eccDNA containing the copper resistance gene CUP1. Transcription of CUP1 causes CUP1 eccDNA accumulation, which occurs in the absence of phenotypic selection. We have developed a sensitive and quantitative eccDNA sequencing pipeline that reveals CUP1 eccDNA accumulation on copper exposure to be exquisitely site specific, with no other detectable changes across the eccDNA complement. eccDNA forms de novo from the CUP1 locus through processing of DNA double-strand breaks (DSBs) by Sae2 / Mre11 and Mus81, and genome-wide analyses show that other protein coding eccDNA species in aged yeast share a similar biogenesis pathway. Although abundant we find that CUP1 eccDNA does not replicate efficiently, and high copy numbers in aged cells arise through frequent formation events combined with asymmetric DNA segregation. The transcriptional stimulation of CUP1 eccDNA formation shows that age-linked genetic change varies with transcription pattern, resulting in gene copy number profiles tailored by environment.

2019-10-18 | GSE135542 | GEO

Whole-genome sequencing of Extrachromosomal circular DNA (eccDNA) of cerebrospinal fluid of Medulloblastoma

Project description:Whole-genome sequencing of Extrachromosomal circular DNA (eccDNA) of cerebrospinal fluid of Medulloblastoma

| PRJNA844049 | ENA