FET fusion oncoprotein-regulated genes in HT1080 cell line
Ontology highlight
ABSTRACT:
OTHER RELATED OMICS DATASETS IN: PXD012680
ORGANISM(S): Homo sapiens
PROVIDER: GSE125941 | GEO | 2019/03/12
REPOSITORIES: GEO
Similar Datasets
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
Project description:Sarcomas and leukemias that are characterized by FET (FUS, EWSR1, TAF15) fusion oncogenes consist of more than 20 entities. Myxoid liposarcoma, one of the most common FET sarcoma types, is defined by the FUS-DDIT3 or the less common EWSR1-DDIT3 fusion oncogene. Previously, JAK-STAT signaling have been connected to cancer stem cell properties and chemotherapy resistance in myxoid liposarcoma, but the role of FUS-DDIT3 is not known. Therefore, we treated HT1080 fibrosarcoma cells expression FUS-DDIT3 with JAK1/2 inhibitor ruxolitinib and performed RNA sequencing of treated and control cells. Additionally, we analyzed native HT1080 cells to be able to compare the induced gene expression changes due to FUS-DDIT3 expression with those induced by JAK-STAT pathway inhibition.
2022-01-14 | GSE149650 | GEO
Project description:Genes encoding the RNA-binding proteins FUS, EWSR1, and TAF15 (FET proteins) are involved in chromosomal translocations in several rare sarcomas. FET-rearranged sarcomas are often aggressive malignancies affecting pediatric, adolescent, and young and middle-aged adults, with prognosis depending on the fusion and whether the disease is localized, metastatic, or relapsed. New therapies are needed for these patients. These translocations fuse the 5’ portion of the FET family gene with a 3’ partner gene encoding a transcription factor. The resulting fusion proteins have the intrinsically disordered low complexity domain (LCD) of the FET protein paired with a DNA binding domain and these chimeras function as oncogenic transcription factors. FET fusion proteins have proven stubbornly difficult to target directly and promising new therapeutic strategies target the critical regulators and co-regulators of these proteins. One such protein is the histone lysine specific demethylase 1 (LSD1). LSD1 physically interacts with and is recruited by multiple FET fusions, including EWSR1::FLI1. LSD1 promotes EWSR1::FLI1 gene regulation and prior studies showed that treatment with the noncompetitive inhibitor SP-2509 blocked the transcriptional activity of the fusion. A similar molecule, seclidemstat (SP-2577), was identified as a promising lead for clinical development and is currently in clinical trials for FET-rearranged sarcomas (NCT03600649). However, whether seclidemstat has pharmacological activity against EWSR1::FLI1 or any other FET fusion protein has yet to be demonstrated. In this study, we sought to evaluate the in vitro potency of seclidemstat against multiple cell lines derived from different FET-rearranged sarcomas, including Ewing sarcoma, desmoplastic small round cell tumor, clear cell sarcoma, and myxoid liposarcoma. We also defined the transcriptomic effect of seclidemstat treatment in these diseases and evaluated the activity of seclidemstat against FET fusion transcriptional regulation in multiple cell lines. Seclidemstat showed potent activity in cell viability assays in all four FET-rearranged sarcomas and disrupted the transcriptional function of all the tested fusion proteins. Though epigenetic and targeted inhibitors are unlikely to be effective as a single agents in the clinic, these data suggest seclidemstat remains a promising new treatment strategy for patients with FET-rearranged sarcomas
2024-06-12 | GSE267611 | GEO
Project description:Myxoid liposarcoma (MLS) is the second most common type of liposarcoma and is characterized by the fusion oncogene FUS‐DDIT3 or the less common EWSR1‐DDIT3. FUS-DDIT3 is causative in tumor development, but the molecular function of FUS-DDIT3 remains largely unknown. In addition, the tumor microenvironment is important in MLS development. However, due to a lack of relevant experimental model systems, it has been challenging to examine the microenvironmental impact in MLS development. Therefore, we have developed an in vivo-like experimental model system utilizing cell-free scaffolds derived from myxoid liposarcoma patient-derived xenograft tumors that can be repopulated with tumor cells. To study the effect of FUS-DDIT3 expression in combination with the MLS microenvironment, we analyzed MLS cell lines as well as fibrosarcoma cells with and without ectopic FUS-DDIT3 expression cultured in scaffolds using cells cultured in monolayers as reference. We identified several gene networks and processes that are uniquely associated with FUS-DDIT3 expression as well as microenvironment. The use of in vivo-like experimental systems opens new possibilities to understand tumor development and develop treatments.
2023-12-31 | GSE230773 | GEO
Project description:Myxoid liposarcoma (MLS) is the second most common type of liposarcoma and is characterized by the fusion oncogene FUS‐DDIT3 or the less common EWSR1‐DDIT3. While the presence of FUS-DDIT3 as a driver oncoprotein in most MLS cases has been confirmed, the exact molecular action behind the capacity of FUS-DDIT3 for transformation is still unclear and therefore creates a challenge in finding new treatments against this type of cancer. The importance of the microenvironment for tumor progression have long been accepted and might also influence the effect of the fusion oncoprotein. However, due to a lack of relevant experimental model systems, it has been challenging to examine the microenvironmental impact in myxoid liposarcoma development. Therefore, we have developed a new model system utilizing scaffolds derived from myxoid liposarcoma patient-derived xenograft tumors that are decellularized and then repopulated with sarcoma cell lines. This cell culture system mimics in vivo-like tumor cell growth conditions and induce transcriptional changes within the cells. In order to investigate the effect of the microenvironment as well as the fusion oncogene, we analyzed myxoid liposarcoma cell lines as well as fibrosarcoma cells with and without ectopic FUS-DDIT3 expression cultured in scaffolds and adherent two-dimensional growth conditions. We identified several gene networks and processes that are uniquely associated with FUS-DDIT3 expression and with the microenvironment, respectively. The development of patient-derived scaffolds opens up new possibilities to understand tumor development.
2023-12-31 | GSE191132 | GEO
Project description:Analysis of differentially expressed genes after siRNA mediated knock-down of the FET-family of proteins; the FUS, EWS, and TAF15 proteins. The FET-proteins are thought to function as transcription factors, and this hypothesis is tested in the present study. Results provide important information of the genes which expression are controlled by the FET-family of proteins. Total RNA obtained HEK293-cells transfected with siRNA targeted against the FUS, EWS, or TAF15 mRNA, or a combination of all three of them. Control cells are transfected with an equal amount of unspecific siRNA without known targets.
2012-02-07 | E-GEOD-35578 | biostudies-arrayexpress
Project description:Several RNA-binding proteins (RBPs) are implicated in amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), including the FET proteins FUS, TAF15 and EWSR1. Cabeza (caz) is the single Drosophila FET ortholog. Here, we identified Xrp1, a poorly characterized DNA-binding protein, as a key modifier of caz mutant phenotypes. Xrp1 expression was strongly upregulated in caz mutants, and Xrp1 heterozygosity rescued their motor defects and life span. Interestingly, selective neuronal Xrp1 knock-down was sufficient to rescue, and neuronal Xrp1 overexpression phenocopied caz mutant phenotypes. The caz/Xrp1 genetic interaction depended on the functionality of the AT-hook DNA-binding domain in Xrp1. Consistently, caz mutants displayed gene expression dysregulation, which was mitigated by Xrp1 heterozygosity. Finally, Xrp1 knock-down substantially rescued the motor deficits and life span of flies expressing ALS-mutant FUS in motor neurons. Taken together, caz mutant phenotypes are mediated by increased neuronal Xrp1 levels, leading to gene expression dysregulation and neuronal dysfunction.
2018-09-06 | PXD008417 | Pride
Project description:Genome-wide DNA methylation profiling of 20 intracranial mesenchymal tumors with FET-CREB fusions encompassing both intracranial myxoid mesenchymal tumors and intracranial angiomatoid fibrous histiocytoma-like neoplasms. The Illumina Infinium EPIC 850k Human DNA Methylation Beadchip was used to obtain DNA methylation profiles across approximately 850,000 CpG sites of genomic DNA extracted from formalin-fixed, paraffin-embedded tumor tissue of 20 intracranial mesenchymal tumors with FET-CREB fusions.
2021-11-18 | GSE164994 | GEO
Project description:Analysis of differentially expressed genes after siRNA mediated knock-down of the FET-family of proteins; the FUS, EWS, and TAF15 proteins. The FET-proteins are thought to function as transcription factors, and this hypothesis is tested in the present study. Results provide important information of the genes which expression are controlled by the FET-family of proteins.
2012-02-07 | GSE35578 | GEO
Project description:Myxoid liposarcoma (MLS) represents a common subtype of liposarcoma molecularly characterized by a recurrent chromosomal translocation that generates a chimeric FUS DDIT3 fusion gene. The FUS-DDIT3 oncoprotein has been shown to be crucial in MLS pathogenesis. Acting as a transcriptional dysregulator, FUS-DDIT3 stimulates proliferation and interferes with adipogenic differentiation. As the fusion protein represents a therapeutically challenging target, a profound understanding of MLS biology is elementary to uncover FUS DDIT3-dependent molecular vulnerabilities. Recently, a specific reliance on the Hippo pathway effector and transcriptional co-regulator YAP1 was detected in MLS; however, details on the molecular mechanism of FUS-DDIT3-dependent YAP1 activation, and YAP1's precise mode of action remain unclear. In elaborate in vitro studies, employing RNA interference-based approaches, small-molecule inhibitors, and stimulation experiments with IGF-II, we show that FUS-DDIT3-driven IGF-IR/PI3K/AKT signaling promotes stability and nuclear accumulation of YAP1 via deregulation of the Hippo pathway. Co-immunoprecipitation and proximity ligation assays revealed nuclear co localization of FUS-DDIT3 and YAP1/TEAD in FUS-DDIT3-expressing mesenchymal stem cells and MLS cell lines. Transcriptome sequencing of MLS cells demonstrated that FUS DDIT3 and YAP1 co-regulate oncogenic gene signatures related to proliferation, cell cycle progression, apoptosis, and adipogenesis. In adipogenic differentiation assays, we show that YAP1 critically contributes to FUS-DDIT3-mediated adipogenic differentiation arrest. Taken together, our study provides mechanistic insights into a complex FUS-DDIT3-driven network involving IGF-IR/PI3K/AKT signals acting on Hippo/YAP1, and uncovers substantial cooperative effects of YAP1 and FUS-DDIT3 in the pathogenesis of MLS.
2022-03-28 | GSE184436 | GEO