Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

MiRNA profiling of rhabdomyosarcoma-derived exosomes compared to donor cells, using the Affymetrix GeneChip miRNA 3.0 array

ABSTRACT: Exosomes were isolated by differential centrifugation from the fusion negative human embryonal rhabdomyosarcoma (ERMS) cell lines (JR1, Rh36, and RD) and fusion positive alveolar RMS (ARMS) cell lines (Rh30 and Rh41) and characterized by western blot for exosomal markers. miRNA content of the RMS-derived exosomes was determined using the Affymetrix GeneChip miRNA 3.0 array and analyzed to specify differentially deregulated (either enriched or depleted) miRNA relative to cellular miRNA from the respective ERMS and ARMS cell lines. Characterization of the miRNA content of RMS exosome is needed to better understand the mechanism by which these particles exert their physiologic effects, notably on proliferation, migration, invasion, and metastasis.

ORGANISM(S): Homo sapiens

SUBMITTER: Sandra Ghayad

PROVIDER: E-MTAB-5321 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Exosomes derived from embryonal and alveolar rhabdomyosarcoma carry differential miRNA cargo and promote invasion of recipient fibroblasts.

Ghayad Sandra E SE Rammal Ghina G Ghamloush Farah F Basma Hussein H Nasr Rihab R Diab-Assaf Mona M Chelala Claude C Saab Raya R

Scientific reports 20161117

Rhabdomyosarcoma (RMS) is an aggressive childhood soft tissue tumor, which exists in oncoprotein PAX-FOXO1 fusion positive and fusion negative subtypes, with the fusion-positive RMS being characterized by a more aggressive clinical behavior. Exosomes are small membranous vesicles secreted into body fluids by multiple cell types, including tumor cells, and have been implicated in metastatic progression through paracrine signaling. We characterized exosomes secreted by a panel of 5 RMS cell lines. ...[more]

PMID: 27853183

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Project description:Rhabdomyosarcoma (RMS) is a highly malignant soft tissue sarcoma classified into two major histologic subtypes: embryonal (ERMS) and alveolar (ARMS). ARMS subtype is clinically more aggressive, and characterized by an oncogenic fusion protein PAX3-FOXO1 (P3F) that drives oncogenic cellular properties. To understand the role of the fusion oncoprotein in paracrine signaling, we focused on secreted exosomes, which have been demonstrated to contribute to metastasis in multiple tumor types. Mass spectrometry analysis of the protein cargo of exosomes isolated from C2C12 myoblasts transduced with P3F fusion gene revealed 52 deregulated proteins compared to control cells, with 26 enriched and 26 depleted proteins. Using both PANTHER gene classification and IPA software, we found that the main biological processes in which the 52 deregulated proteins are involved include “Catalytic activity”, “Binding”, “Metabolic process” and “Cellular process”. The pathways engaging the 26 enriched proteins include “14-3-3 mediated signaling”, “Cell cycle” and “ERK5, VEGF, IGF1and p70S6K signaling”. Main nodes in which deregulated exosome protein and miRNA intersected revealed pathways conferring protection from stress and promoting plasticity. Physiologically, exosomes derived from P3F-C2C12 cells activated ERK, 4-EBP1 and MMP-2, factors known to increase cell proliferation and invasion. In addition, they increased angiogenesis as evidenced by studies on HUVEC cells, and promoted stemness of MEFs and C2C12 cells. Treating stromal cells with exosomes from P3F-C2C12 cells protected them against effects of hydrogen peroxide (H2O2) in vitro, noting that P3F-C2C12 cells produce less ROS and are more resistant to induced exogenous oxidative stress as compared to control cells. Our findings highlight the role of P3F fusion protein in modulating exosome cargo to confer a protective effect on recipient cells against oxidative stress and promote plasticity and survival, potentially contributing to the known aggressive phenotype of the fusion gene-positive subtype of ARMS.

Dataset Information

MiRNA profiling of rhabdomyosarcoma-derived exosomes compared to donor cells, using the Affymetrix GeneChip miRNA 3.0 array

Publications

Exosomes derived from embryonal and alveolar rhabdomyosarcoma carry differential miRNA cargo and promote invasion of recipient fibroblasts.

Similar Datasets

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