Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

EWSR1::FLI1 fusion oncoproteins’ regulation of ETS1 (RNA-seq)

ABSTRACT: Ewing sarcomas harbor few mutations beyond the chromosomal translocation that initiates disease and the mechanistic basis for the metastasis of these tumors remains poorly understood. The epigenome of Ewing sarcoma (EWS) cells reflects the regulatory state of genes associated with the DNA binding activity of the fusion oncoproteins EWSR1::FLI1 or EWSR1::ERG. In this study, we examined the repressive activities of the EWSR1::FLI1/ERG fusion oncoproteins. Focusing on one of the repressed EWSR1::FLI1/ERG target genes, ETS1, we detected EWSR1::FLI1 binding and a H3K27me3 repressive mark at this locus. Depletion of EWSR1::FLI1 results in ETS1’s binding of promoter regions, and we show ETS1 regulates the expression of multiple proteins that function in extracellular matrix organization including TENSIN3 (TSN3). Interestingly, TSN3 expression in EWS tumors significantly correlates with that of ETS1 (0.85, FDR <0.01). TNS3 is a focal adhesion protein that contributes to tumor cell migration by connecting the cytoplasmic tail of integrins to the actin cytoskeleton. EWS cell lines, in which we activated ETS1 expression (CRISPRa) exhibited increased TNS3 expression and a migratory phenotype. Critically, the activated ETS1 EWS cell lines show TNS3 accumulation at leading cell edges, with F-actin cytoskeletal reorganization, a phenotype associated with cell migration.

ORGANISM(S): Homo sapiens

PROVIDER: GSE243279 | GEO | 2024/04/15

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Similar Datasets

EWSR1::FLI1 fusion oncoproteins’ regulation of ETS1 (ChIP-seq)

Project description:Ewing sarcomas harbor few mutations beyond the chromosomal translocation that initiates disease and the mechanistic basis for the metastasis of these tumors remains poorly understood. The epigenome of Ewing sarcoma (EWS) cells reflects the regulatory state of genes associated with the DNA binding activity of the fusion oncoproteins EWSR1::FLI1 or EWSR1::ERG. In this study, we examined the repressive activities of the EWSR1::FLI1/ERG fusion oncoproteins. Focusing on one of the repressed EWSR1::FLI1/ERG target genes, ETS1, we detected EWSR1::FLI1 binding and a H3K27me3 repressive mark at this locus. Depletion of EWSR1::FLI1 results in ETS1’s binding of promoter regions, and we show ETS1 regulates the expression of multiple proteins that function in extracellular matrix organization including TENSIN3 (TNS3). Interestingly, TNS3 expression in EWS tumors significantly correlates with that of ETS1 (0.85, FDR <0.01). TNS3 is a focal adhesion protein that contributes to tumor cell migration by connecting the cytoplasmic tail of integrins to the actin cytoskeleton. EWS cell lines, in which we activated ETS1 expression (CRISPRa) exhibited increased TNS3 expression and a migratory phenotype. Critically, the activated ETS1 EWS cell lines show TNS3 accumulation at leading cell edges, with F-actin cytoskeletal reorganization, a phenotype associated with cell migration.

2024-04-15 | GSE243171 | GEO

EWSR1::FLI1 fusion oncoproteins’ regulation of ETS1 (CUT&RUN)

Project description:Ewing sarcomas harbor few mutations beyond the chromosomal translocation that initiates disease and the mechanistic basis for the metastasis of these tumors remains poorly understood. The epigenome of Ewing sarcoma (EWS) cells reflects the regulatory state of genes associated with the DNA binding activity of the fusion oncoproteins EWSR1::FLI1 or EWSR1::ERG. In this study, we examined the repressive activities of the EWSR1::FLI1/ERG fusion oncoproteins. Focusing on one of the repressed EWSR1::FLI1/ERG target genes, ETS1, we detected EWSR1::FLI1 binding and a H3K27me3 repressive mark at this locus. Depletion of EWSR1::FLI1 results in ETS1’s binding of promoter regions, and we show ETS1 regulates the expression of multiple proteins that function in extracellular matrix organization including TENSIN3 (TSN3). Interestingly, TSN3 expression in EWS tumors significantly correlates with that of ETS1 (0.85, FDR <0.01). TNS3 is a focal adhesion protein that contributes to tumor cell migration by connecting the cytoplasmic tail of integrins to the actin cytoskeleton. EWS cell lines, in which we activated ETS1 expression (CRISPRa) exhibited increased TNS3 expression and a migratory phenotype. Critically, the activated ETS1 EWS cell lines show TNS3 accumulation at leading cell edges, with F-actin cytoskeletal reorganization, a phenotype associated with cell migration.

2024-04-15 | GSE243277 | GEO

EWSR1::FLI1 fusion oncoproteins’ regulation of ETS1 (RNA-seq)

Project description:Ewing sarcomas harbor few mutations beyond the chromosomal translocation that initiates disease and the mechanistic basis for the metastasis of these tumors remains poorly understood. The epigenome of Ewing sarcoma (EWS) cells reflects the regulatory state of genes associated with the DNA binding activity of the fusion oncoproteins EWSR1::FLI1 or EWSR1::ERG. In this study, we examined the repressive activities of the EWSR1::FLI1/ERG fusion oncoproteins. Focusing on one of the repressed EWSR1::FLI1/ERG target genes, ETS1, we detected EWSR1::FLI1 binding and a H3K27me3 repressive mark at this locus. Depletion of EWSR1::FLI1 results in ETS1’s binding of promoter regions, and we show ETS1 regulates the expression of multiple proteins that function in extracellular matrix organization including TENSIN3 (TSN3). Interestingly, TSN3 expression in EWS tumors significantly correlates with that of ETS1 (0.85, FDR <0.01). TNS3 is a focal adhesion protein that contributes to tumor cell migration by connecting the cytoplasmic tail of integrins to the actin cytoskeleton. EWS cell lines, in which we activated ETS1 expression (CRISPRa) exhibited increased TNS3 expression and a migratory phenotype. Critically, the activated ETS1 EWS cell lines show TNS3 accumulation at leading cell edges, with F-actin cytoskeletal reorganization, a phenotype associated with cell migration.

2024-04-15 | GSE243183 | GEO

Fusion protein EWS-FLI1 is incorporated into a protein granule in cells

Project description:Ewing sarcoma is driven by fusion proteins containing a low complexity (LC) domain that is intrinsically disordered and a powerful transcriptional regulator. The most common fusion protein found in Ewing sarcoma, EWS-FLI1, takes its LC domain from the RNA-binding protein EWSR1 (Ewing Sarcoma RNA-binding protein 1) and a DNA-binding domain from the transcription factor FLI1 (Friend Leukemia Virus Integration 1). The LC domain in EWS-FLI1 can bind RNA polymerase II (RNA Pol II) and can self-assemble through a process known as phase separation. The ability of EWSR1 and related RNA-binding proteins to assemble into ribonucleoprotein granules in cells has been intensely studied but the role of phase separation in EWS-FLI1 activity is less understood. We investigated the overlapping functions of EWSR1 and EWS-FLI1 in controlling gene expression and tumorigenic cell growth in Ewing sarcoma, and our results suggested that these proteins function closely together. We then studied the nature of interactions among EWS-FLI1, EWSR1, and RNA Pol II. We observed EWSR1 and RNA Pol II to be present in protein granules in cells. We then identified protein granules in cells associated with the fusion protein, EWS-FLI1. The tyrosine residues in the LC domain are required for the abilities of EWS-FLI1 to bind its partners, EWSR1 and RNA Pol II, and to incorporate into protein granules. These data suggest that interactions among EWS-FLI1, RNA Pol II, and EWSR1 in Ewing sarcoma can occur in the context of a molecular scaffold found within protein granules in the cell.

2020-07-23 | GSE154944 | GEO

Oncofusion driven de novo enhancer assembly promotes malignancy in Ewing sarcoma via aberrant expression of the stereociliary protein LOXHD1 [hypoxia]

Project description:Ewing Sarcoma (EwS) is a highly aggressive tumor of bone and soft tissues that mostly affects children and adolescents. The pathognomonic oncofusion EWSR1-ETS (EWS-FLI1/EWSR1-ERG) transcription factors drive EwS by orchestrating an oncogenic transcription program through de novo enhancers. Pharmacological targeting of these oncofusions has been challenged by unstructured prion-like domains and common DNA binding motifs in the EWSR1 and ETS protein, respectively. Alternatively, identification and characterization of mediators and downstream targets of EWS-FLI1 dependent or independent function could offer novel therapeutic options. By integrative analysis of thousands of transcriptome datasets representing pan-cancer cell lines, primary cancer, metastasis, and normal tissues, we have identified a 32 gene signature (ESS32) that could stratify EwS from pan-cancer. Of the ESS32 (Ewing Sarcoma Specific 32), LOXHD1 - coding for a stereociliary protein was the most exquisite gene expressed in EwS. CRISPR-Cas9 mediated deletion or silencing of EWS-FLI1 bound upstream de novo enhancer elements in EwS cells led to the loss of LOXHD1 expression and altered the EWS-FLI1, MYC, and HIF1 pathway genes, resulting in decreased proliferation and invasion in vitro and in vivo. These observations open up new avenues for developing LOXHD1-targeted drugs or cellular therapies for this deadly disease.

2022-06-04 | GSE163333 | GEO

Oncofusion driven de novo enhancer assembly promotes malignancy in Ewing sarcoma via aberrant expression of the stereociliary protein LOXHD1 [ChIP-seq]

2022-06-04 | GSE163332 | GEO

Oncofusion driven de novo enhancer assembly promotes malignancy in Ewing sarcoma via aberrant expression of the stereociliary protein LOXHD1 [enhancer knockdown]

2022-06-04 | GSE163334 | GEO

Identification of FET-oncoprotein-interacting proteins by immunoprecipitation and mass spectrometry analysis in sarcoma cell lines

Project description:The FET family of fusion oncogenes carry one of the three genes, FUS, EWSR1 or TAF15, as 5’‑partners juxtaposed to one of many different DNA binding transcription factor genes as 3’‑partners. FET fusion oncogenes are pathognomonic for many types of sarcoma and leukemia, such as FUS-DDIT3 in myxoid liposarcoma (MLS) and EWSR1-FLI1 in Ewing sarcoma (EWS). We used recombinant FET N-terminal domains in a pulldown screen to find interaction partners to the FET proteins and identified components of the SWI/SNF complex. The ~2 MDa SWI/SNF chromatin remodeling complex utilizes energy from ATP hydrolysis to remodel nucleosomes and expose DNA. We used immunoprecipitation followed by mass spectrometry or western blot analysis to extensively characterize the interaction between FET fusion oncoproteins and the SWI/SNF complex.

2019-03-13 | PXD012680 | Pride

Effect of RREB1 knockdown using siRNA in A673 Ewing sarcoma cells (RNA-seq)

Project description:Ewing sarcoma (EwS) is a rare bone and soft tissue malignancy driven by chromosomal translocations encoding chimeric transcription factors, such as EWSR1-FLI1, that bind GGAA motifs forming novel enhancers that alter nearby expression. We propose germline microsatellite variation at the 6p25.1 EwS susceptibility locus could impact downstream gene expression and EwS biology. We performed targeted long-read sequencing of EwS blood DNA to characterize variation and genomic features important for EWSR1-FLI1 binding. We identified 50 microsatellite alleles at 6p25.1 and observed EwS cases had longer alleles (>135 bp) with more GGAA repeats. The 6p25.1 GGAA microsatellite showed chromatin features of an EWSR1-FLI1 enhancer, and regulated expression of RREB1, a transcription factor associated with RAS/MAPK signaling. RREB1 knockdown reduced proliferation and clonogenic potential, and reduced expression of cell cycle and DNA replication genes. Our integrative analysis at 6p25.1 details increased binding of longer GGAA microsatellite alleles with acquired EWSR-FLI1 to promote Ewing sarcomagenesis by RREB1-mediated proliferation.

2023-10-23 | GSE220780 | GEO

Enriched EWSR1 and EWS-FLI1 RNA-seq of HNRNPH1-silenced TC32 Ewing sarcoma and 293T human embryonic kidney cells.

Project description:Identification of EWSR1 and EWS-FLI1 transcript variants associated with the silencing of HNRNPH1 in TC32 Ewing sarcoma and 293T human embryonic kidney (HEK-293T) cells.

2019-09-20 | GSE119974 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data