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EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma [CUT&RUN]

ABSTRACT: EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma [CUT&RUN]

PROVIDER: PRJNA756549 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15539062_1.fastq.gz	Fastqsanger.gz
	SRR15539062_2.fastq.gz	Fastqsanger.gz
	SRR15539063_1.fastq.gz	Fastqsanger.gz
	SRR15539063_2.fastq.gz	Fastqsanger.gz
	SRR15539064_1.fastq.gz	Fastqsanger.gz

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EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma [RNA-seq]

Project description:Posterior homeobox D genes, in particular HOXD13, are over-expressed by Ewing sarcoma, a tumor driven by the oncogenic fusion protein EWS-FLI1. Here, we have found that EWS-FLI1 maintains HOXD13 expression through a GGAA microsatellite enhancer in the developmental posterior HOXD regulatory domain. Activation of this enhancer is EWS-FLI1 dependent and epigenomic silencing of this region leads to loss of HOXD13 expression in Ewing sarcoma cells, but not in unrelated cells. To determine the function of HOXD13 activation in Ewing sarcoma we performed nascent RNA sequencing or RNA sequencing upon HOXD13 knockdown.

2022-06-28 | GSE148494 | GEO

EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma [CITE-seq]

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EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma [CUT&RUN]

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USP1 expression driven by EWS-FLI1 transcription factor stabilizes Survivin and promotes Ewing sarcoma cell survival

Project description:Ewing sarcoma (EWS) is a malignant pediatric bone cancer. Most Ewing sarcomas are driven by EWS-FLI1 oncogenic transcription factor that plays roles in transcriptional regulation, DNA damage response, cell cycle checkpoint control, and alternative splicing. USP1, a deubiquitylase which regulates DNA damage and replication stress responses, is overexpressed at both the mRNA and protein levels in EWS cell lines compared to human mesenchymal stem cells, the EWS cell of origin. The functional significance of high USP1 expression in Ewing sarcoma is not known. Here, we identify USP1 as a transcriptional target of EWS-FLI1 and a key regulator of EWS cell survival. We show that EWS-FLI1 knockdown decreases USP1 mRNA and protein levels. ChIP and ChIP-seq analyses show EWS-FLI1 occupancy on the USP1 promoter. Importantly, USP1 knockdown or inhibition arrests EWS cell growth and induces cell death by apoptosis. We observe destabilization of Survivin (also known as BIRC5 or IAP4) and activation of caspases-3 and -7 following USP1 knockdown or inhibition in the absence of external DNA damage stimuli. Notably, EWS cells display hypersensitivity to combinatorial treatment of doxorubicin or etoposide, EWS standard of care drugs, and USP1 inhibitor compared to single agents alone. Together, our study demonstrates that USP1 is regulated by EWS-FLI1, the USP1-Survivin axis promotes EWS cell survival, and USP1 inhibition sensitizes EWS cells to standard of care chemotherapy.

2024-01-26 | PXD041033 | Pride

EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma

Project description:EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma

| PRJNA756547 | ENA

Identification of genes regulated by knockdown of EWS-FLI1 in Ewing sarcoma cells.

Project description:EWS-FLI1 is the driver oncogene in >85% of Ewing sarcoma tumors. We used siRNA to knock down EWS-FLI1 for 48h hours in two Ewing sarcoma cell lines (EW8, TC71) to identify downstream genes and pathways affected by loss of EWS-FLI1 activity. RNAseq analysis was performed after 48 hours of treatment with a nontargeting siControl or siEWS-FLI1.

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Project description:We have performed a high-throughput RNA interference screen to identify targets inhibiting EWS-FLI1 driven cell proliferation in Ewing sarcoma cells. EWS-FLI1 expressing A673 Ewing sarcoma cells were screened both in presence and absence of EWS-FLI1 shRNA induction with druggable siRNA library. Leucine rich repeats and WD repeat Domain containing 1 (LRWD1) targeting siRNA pool was the strongest anti-proliferative hit identified only in presence of EWS-FLI1. Validation experiments confirmed the anti-proliferative effect of LRWD1 depletion especially in EWS-FLI1 expressing cells. Functional analysis of differentially expressed genes in LRWD1 depleted Ewing sarcoma cells showed over-representation of connective tissue development, cell projection morphogenesis and neuronal processes.

2018-09-16 | GSE73092 | GEO

EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma [CITE-seq]

Project description:EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma [CITE-seq]

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EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma [RNA-seq]

Project description:EWS-FLI1 and HOXD13 control tumor cell plasticity in Ewing sarcoma [RNA-seq]

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Project description:We identified global DNA binding properties of EWS-FLI1 in mouse Ewing sarcoma. GGAA microsatellites were found as binding sites of EWS-FLI1 but with less frequency than that in human Ewing sarcoma, and genomic distribution is not conserved between human and mouse.

2018-07-25 | GSE108631 | GEO

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