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PAX3-FOXO1 expression in endothelial progenitors dictates myogenic reprogramming and rhabdomyosarcoma identity

ABSTRACT: PAX3-FOXO1 expression in endothelial progenitors dictates myogenic reprogramming and rhabdomyosarcoma identity

PROVIDER: PRJNA902903 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR22341903_1.fastq.gz	Fastqsanger.gz
	SRR22341903_2.fastq.gz	Fastqsanger.gz
	SRR22341904_1.fastq.gz	Fastqsanger.gz
	SRR22341904_2.fastq.gz	Fastqsanger.gz
	SRR22341905_1.fastq.gz	Fastqsanger.gz

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PAX3-FOXO1 dictates myogenic reprogramming and rhabdomyosarcoma identity in endothelial progenitors [RNA-seq]

Project description:Fusion-positive rhabdomyosarcoma (FP-RMS) driven by the expression of the PAX3-FOXO1 (P3F) fusion oncoprotein is an aggressive subtype of pediatric rhabdomyosarcoma. FP-RMS histologically resembles developing muscle yet occurs throughout the body in areas devoid of skeletal muscle highlighting that FP-RMS is not derived from an exclusively myogenic cell of origin. Here we demonstrate that P3F reprograms mouse and human endothelial progenitors to FP-RMS. We show that P3F expression in aP2-Cre expressing cells reprograms endothelial progenitors to functional myogenic stem cells capable of regenerating injured muscle fibers. Further, we describe a FP-RMS mouse model driven by P3F expression and Cdkn2a loss in endothelial cells. Additionally, we show that P3F expression in TP53-null human iPSCs blocks endothelial-directed differentiation and guides cells to become myogenic cells that form FP-RMS tumors in immunocompromised mice. Together these findings demonstrate that FP-RMS can originate from aberrant development of non-myogenic cells driven by P3F.

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PAX3-FOXO1 dictates myogenic reprogramming and rhabdomyosarcoma identity in endothelial progenitors [Cut&Run]

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PAX3-FOXO1 dictates myogenic reprogramming and rhabdomyosarcoma identity in endothelial progenitors [Cut&Run]

Project description:PAX3-FOXO1 dictates myogenic reprogramming and rhabdomyosarcoma identity in endothelial progenitors [Cut&Run]

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PAX3-FOXO1 dictates myogenic reprogramming and rhabdomyosarcoma identity in endothelial progenitors [RNA-seq]

Project description:PAX3-FOXO1 dictates myogenic reprogramming and rhabdomyosarcoma identity in endothelial progenitors [RNA-seq]

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PAX3-FOXO1 expression in endothelial progenitors dictates myogenic reprogramming and rhabdomyosarcoma identity[Cut&Run]

Project description:Fusion-positive rhabdomyosarcoma (FP-RMS) driven by the expression of the PAX3-FOXO1 (P3F) fusion oncoprotein is an aggressive subtype of pediatric rhabdomyosarcoma. FP-RMS histologically resembles developing muscle yet occurs throughout the body in areas devoid of skeletal muscle highlighting that FP-RMS is not derived from an exclusively myogenic cell of origin. Here we demonstrate that P3F reprograms mouse and human endothelial progenitors to FP-RMS. We show that P3F expression in aP2-Cre expressing cells reprograms endothelial progenitors to functional myogenic stem cells capable of regenerating injured muscle fibers. Further, we describe a novel FP-RMS mouse model driven by P3F expression and CDKN2A loss in endothelial cells. Additionally, we show that P3F expression in p53 null human iPSCs blocks endothelial directed differentiation and guides cells to become myogenic cells that form FP-RMS tumors in immunocompromised mice. Together these findings demonstrate that FP-RMS can originate from aberrant development of non-myogenic cells driven by P3F.

2023-09-30 | GSE218265 | GEO

PAX3-FOXO1 expression in endothelial progenitors dictates myogenic reprogramming and rhabdomyosarcoma identity[Hi-C]

Project description:Fusion-positive rhabdomyosarcoma (FP-RMS) driven by the expression of the PAX3-FOXO1 (P3F) fusion oncoprotein is an aggressive subtype of pediatric rhabdomyosarcoma. FP-RMS histologically resembles developing muscle yet occurs throughout the body in areas devoid of skeletal muscle highlighting that FP-RMS is not derived from an exclusively myogenic cell of origin. Here we demonstrate that P3F reprograms mouse and human endothelial progenitors to FP-RMS. We show that P3F expression in aP2-Cre expressing cells reprograms endothelial progenitors to functional myogenic stem cells capable of regenerating injured muscle fibers. Further, we describe a novel FP-RMS mouse model driven by P3F expression and CDKN2A loss in endothelial cells. Additionally, we show that P3F expression in p53 null human iPSCs blocks endothelial directed differentiation and guides cells to become myogenic cells that form FP-RMS tumors in immunocompromised mice. Together these findings demonstrate that FP-RMS can originate from aberrant development of non-myogenic cells driven by P3F.

2023-09-30 | GSE218254 | GEO

PAX3-FOXO1 expression in endothelial progenitors dictates myogenic reprogramming and rhabdomyosarcoma identity[Hi-C]

Project description:PAX3-FOXO1 expression in endothelial progenitors dictates myogenic reprogramming and rhabdomyosarcoma identity[Hi-C]

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PAX3-FOXO1 expression in endothelial progenitors dictates myogenic reprogramming and rhabdomyosarcoma identity[Cut&Run]

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BioID HEK293T PAX3-FOXO1 proximity labelling

Project description:PAX3-FOXO1 is a fusion transcription factor that is the main driver of tumorigenesis leading to the development of alveolar rhabdomyosarcoma (aRMS). Since aRMS cells are addicted to PAX3-FOXO1 activity, the fusion protein also represents a major target for therapeutic interference, which is however challenging as transcription factors usually cannot be inhibited directly by small molecules. Hence, characterization of the biology of PAX3-FOXO1 might lead to the discovery of new possibilities for an indirect inhibition of its activity. Here, our goal was to characterize the proteomic neighborhood of PAX3-FOXO1 and to find candidates potentially affecting its activity and tumor cell viability. Towards this aim, we expressed BirA fused versions of PAX3-FOXO1 (N- and C-terminal) in HEK293T cells under presence of biotin. In the control setup, we expressed the BirA enzyme alone. After Streptavidin purification of biotinylated proteins, we performed mass spectrometry and quantified relative abundances compared to control conditions. This enabled us to determine PAX3-FOXO1 proximal proteins, which we investigated further in orthogonal endogenous systems.

2021-09-16 | PXD022187 | Pride

PAX3-FOXO1 establishes myogenic super enhancers [RMS Chip-seq]

Project description:The fusion transcription factor PAX3-FOXO1 drives oncogenesis in a subset of rhabdomyosarcomas, however the mechanisms by which it remodels chromatin are unknown. We find PAX3-FOXO1 reprograms the cis-regulatory landscape by inducing super enhancers (SEs), in collaboration with master transcription factors MYOG, MYOD and MYCN. This myogenic SE circuitry is consistent across cell lines and primary tumors. Deregulation of PAX3-FOXO1 itself occurs by translocation-induced chromatin loops bringing the PAX3 promoter under the control of FOXO1 enhancers. Protein targets induced by, or bound to, PAX3-FOXO1 occupied SEs, were selectively sensitive to small molecule inhibition. PAX3-FOXO1 co-binds BRD4 at SEs, and BET bromodomains are required for PAX3-FOXO1-dependent transcription and cancer cell growth.

2017-04-27 | GSE83726 | GEO

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