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Exome sequencing of patients with Ewings sarcoma

ABSTRACT: Cancer is driven by mutations in the genome. We will uncover the mutations that give rise to Ewing’s sarcoma, a bone tumour that largely affects children. We will use second generation Illumina massively parallel sequencing, and bespoke software, to characterise the genomes and transcriptomes of Ewings’ sarcoma tumours.

PROVIDER: EGAS00001000266 | EGA |

REPOSITORIES: EGA

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RNAseq of patients with Ewings sarcoma

Project description:Cancer is driven my mutations in the genome. We will uncover the mutations that give rise to Ewings sarcoma, a bone tumour that largely affects children. We will use second generation Illumina massively parallel sequencing, and bespoke software, to characterise the genomes and transcriptomes of Ewings sarcoma tumours.

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Project description:Cancer is driven my mutations in the genome. We will uncover the mutations that give rise to Ewing's sarcoma, a bone tumour that largely affects children. We will use second generation Illumina massively parallel sequencing, and bespoke software, to characterise the genomes and transcriptomes of Ewing's sarcoma tumours.

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Project description:Cancer is driven by mutations in the genome. We will uncover the mutations that give rise to Ewing's sarcoma, a bone tumour that largely affects children. We will use second generation Illumina massively parallel sequencing, and bespoke software, to characterise the genomes and transcriptomes of Ewing's sarcoma tumours.

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Ewings Sarcoma RNA seq drug sensitivity

Project description:Illumina RNA-Seq will be performed on four Ewing’s sarcoma cell lines and two control cell lines. RNA was extracted from all the lines using a basic Trizol extraction protocol.

2013-01-30 | E-ERAD-144 | biostudies-arrayexpress

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Expression data of mouse Ewing's sarcoma

Project description:Ewing’s sarcoma is highly malignant bone tumor that involves childhood and adolescent, and its nature has not been well understood. To clarify its cellular origin and the mechanisms of tumorigenesis, we used ex vivo approach to create a murine model for Ewing’s sarcoma. The osteochondrogenic progenitors derived from the facial zone (FZ) of murine long bones at late gestation were purified by microdissection, introduced with EWS-FLI1 or EWS-ERG retroviruses and transplanted into nude mice. Ewing’s sarcoma-like small round cell sarcoma developed at 100% penetrance, whereas tumor induction was less effective when growth place (GP)-derived cells were used. The different response of gene expression to EWS-FLI1 between FZ and GP cells suggests importance of the specific cellular context for EWS-FLI1 to induce Ewing’s sarcoma. The Wnt/β-catenin pathway was involved in close relationship to the cellular context, with Dkk2 and Wipf1 as important downstream modulators. Furthermore, gene expression profiling revealed similarity between our models and human Ewing’s sarcoma. These results indicate that Ewing’s sarcoma originates from the embryonic osteochondrogenic progenitor.

2014-06-30 | GSE32615 | GEO

Ewing sarcoma protein-mediated regulation of poly(ADP-ribose) polymerase 1 dissociation

Project description:Poly(ADP-ribose) polymerase 1 (PARP1) critically facilitates DNA damage response (DDR) that suppresses genomic instability. However, the physiological function of PARP1 in regulating genomic integrity is unclear. We investigated the Ewing’s sarcoma breakpoint region 1 (EWS) and found that it regulated the physiological function of PARP1. EWS was indispensable to dissociation of PARP1 from damaged DNA, promoting DDR and regulating DDR protein expression. Abnormal PARP1 accumulation due to EWS expression silencing, induced hyper-PARylation, which exhausted cellular NAD+ levels and caused cell death in in vitro and in vivo. Positively charged EWS arginine-glycine-glycine (Arg-Gly-Gly, RGG) domains directly interact with poly ADP-ribose (PAR) chains produced by PARP1 and are essential to dissociate PARP1 from damaged DNA. Consistently, Ewing’s sarcoma cells with defective EWS function accumulated PARP1 on chromatin and tissues from Ewing’s sarcoma patients, exhibiting high PARylation levels. Taken together, loss of EWS causes defects in PARP1 dissociation and results in genomic instability.

2020-11-03 | PXD016145 | Pride

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