IL11RA signaling and EZH2 activity in osteosarcoma
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE191215 | GEO | 2022/03/01
REPOSITORIES: GEO
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Project description:IL11RA signaling and EZH2 activity in osteosarcoma
| PRJNA790619 | ENA
Project description:Effective therapies for metastatic osteosarcoma (OS) remain a major clinical unmet need. Targeting mRNA translation in metastatic OS represents an attractive option, as selective translation under stress supports the rapid synthesis of cytoprotective proteins that facilitate metastatic competence. We therefore assessed eukaryotic translation factors in OS, revealing high expression of eIF4A1 in metastatic OS. The eIF4A1 inhibitor, CR-1-31B, potently inhibited metastatic OS growth in vitro and reduced lung tumor burden in orthotopic mouse models. CR-1-31B synergized with the oxidative stress inducer, tert-butylhydroquinone (tBHQ), to enhance cell death under oxidative stress. Proteomic analysis revealed a subset of proteins that were upregulated by tBHQ alone, but inhibited by co-treatment of CR-1-31B, most notably the NRF2 antioxidant transcription factor, and NRF2 inactivation phenocopied CR-1-31B in blocking OS lung metastasis in vivo. Collectively, our data reveal that targeting eIF4A1 with CR-1-31B is highly effective in blocking OS metastasis by blunting the NRF2 antioxidant response.
2024-07-16 | PXD047420 | Pride
Project description:It has been reported that GLI2 promotes proliferation, migration, and invasion of mesenchymal stem cell and osteosarcoma cells. To examine the molecular mechanisms of GLI2-mediated osteosarcoma metastasis, we performed a microarray analysis. The gene encoding ribosomal protein S3 (RPS3) was identified as a target of GLI2. Real-time PCR revealed that RPS3 was upregulated in osteosarcoma cell lines compared with normal osteoblast cells. Knockdown of GLI2 decreased RPS3 expression, whereas forced expression of a constitutively active form of GLI2 upregulated the expression of RPS3. RPS3 knockdown by siRNA decreased the migration and invasion of osteosarcoma cells. Although forced expression of constitutively active GLI2 increased the migration of human mesenchymal stem cells, knockdown of RPS3 reduced the up-regulated migration. In contrast, forced expression of RPS3 increased migration and invasion of osteosarcoma cells. Moreover, reduction of migration by GLI2 knockdown was rescued by forced expression of RPS3. Immunohistochemical analysis showed that RPS3 expression was increased in primary osteosarcoma lesions with lung metastases compared with those without. These findings indicate that GLI2–RPS3 signaling may be a marker of invasive osteosarcoma and a therapeutic target for patients with osteosarcoma.
2012-12-14 | GSE42903 | GEO
Project description:A Sleeping Beauty (SB) transposon forward genetic screen was performed to identify the genes that promote osteosarcoma (OS) development and metastasis. Mutagenesis induced OS in wild type mice and accelerated it on a Trp53 deficient background. Analysis of tumors demonstrated that Trp53 deficiency is correlated with genomic instability, which was virtually absent in tumors induced by SB mutagenesis alone. Metastases developed in a subset of animals and in nearly all cases were clonal related to primary tumors. Over 200 candidate genes were identified, many of which are altered in human cancers including OS. Signaling pathways enriched for candidate genes were also identified and a subset of these pathways and genes were functionally validated and represent new targets for OS treatment. Bisulphite converted DNA from the 21 diagnosis osteosarcoma patients and 3 hOB cell line replicates were hybridised to the Illumina Infinium 450K Human Methylation Beadchip.
2015-04-07 | E-GEOD-58770 | biostudies-arrayexpress
Project description:Osteosarcoma (OS) is one of the leading causes of cancer mortality in children and teenagers. Patients with OS have been shown to have a poor prognosis and may suffer from potential distant metastasis. Emerging evidence has revealed that circular RNAs (circRNAs) are involved in OS progression. In this paper, we aim to explore the function of hsa_circ_0000073 in the progression of OS. OS cells transfected with sh‐NC or sh-circ_0000073 were enrolled in this study.We used microarray analysis to identify the mRNA expression in the cells.
2021-08-24 | GSE176373 | GEO
Project description:Pulmonary metastasis is the main cause of medical failure and death of osteosarcoma patients. Our recent study identified IRX1 as a potential metastasis-driving gene in osteosarcoma. Studies showed that IRX1 can promote the migration, invasion and anoikis resistance of osteosarcoma cells. We generated 143B stable IRX1 knockdown and control cell lines, and found that IRX1 knockdown can inhibit the pulmonary metastasis of 143B cells in orthotopic mouse osteosarcoma model. Expression microarrays are performed in143B-shCtrl and 143B-shIRX1 cells to study the mechanism of IRX1 on promoting metastasis of osteosarcoma
2015-08-25 | E-GEOD-55958 | biostudies-arrayexpress
Project description:Pulmonary metastasis is the main cause of medical failure and death of osteosarcoma patients. Our recent study identified IRX1 as a potential metastasis-driving gene in osteosarcoma. Studies showed that IRX1 can promote the migration, invasion and anoikis resistance of osteosarcoma cells. We generated 143B stable IRX1 knockdown and control cell lines, and found that IRX1 knockdown can inhibit the pulmonary metastasis of 143B cells in orthotopic mouse osteosarcoma model.
2015-08-25 | GSE55958 | GEO
Project description:Overexpression of EZH2 in estrogen receptor negative (ER-) breast cancer promotes metastasis. EZH2 has been mainly studied as the catalytic component of the Polycomb Repressive Complex 2 (PRC2) that mediates gene repression by trimethylating histone H3 at lysine 27 (H3K27me3). However, how EZH2 drives metastasis despite the low H3K27me3 levels observed in ER- breast cancer is unknown. We have shown that in human invasive carcinomas and distant metastases, cytoplasmic EZH2 phosphorylated at T367 is significantly associated with ER- disease and low H3K27me3 levels. Here, we explore the interactome of EZH2 and of a phosphodeficient mutant EZH2_T367A. We identified novel interactors of EZH2, and identified interactions that are dependent on the phosphorylation and cellular localization of EZH2 that may play a role in EZH2 dependent metastatic progression.
2018-07-03 | PXD010073 | Pride
Project description:Osteosarcoma (OS) is a primary malignant bone tumor commonly affecting children, adolescents, and young adults with a potential to metastasize to distal sites, most commonly lung. Here, we mapped the active chromatin landscapes of OS patients with varying extent of disease. We integrated histone H3 lysine acetylated chromatin (H3K27ac) profiles (n=13), chromatin accessibility profiles (n=11) and gene expression (n=13) of OS tumors from four different diseased states to understand the differences in their active chromatin profiles and its impact on molecular mechanisms driving the malignant phenotypes. Primary tumors that undergo metastasis (primary mets) have a distinct enhancer landscape compared to primary tumors that remain localized (localized) during the course of disease. The difference in chromatin activity shapes the transcriptional profile of OS patients. Some of the genes like PPP1R1B, PREX1 and IGF2BP1 whose role in OS pathogenesis and metastasis remains poorly understood, exhibit increased enhancer activity in primary mets along with higher RNA levels. Genome-wide loss-of-function screens also reveal these genes to be as selective dependencies in bone sarcomas, making them promising candidates for further investigation. Overall, differential chromatin activity in primary mets occurs in proximity of genes regulating actin cytoskeleton organization, cellular adhesion, and migration process suggestive of their role in facilitating OS metastasis. Thus, this data demonstrates that metastatic potential is intrinsically present in primary mets OS much before the occurrence of metastasis and when the cells are presented with favorable conditions to migrate and colonize at a distant site, they under undergo metastasis.
2023-12-09 | GSE234998 | GEO
Project description:Osteosarcoma (OS) is a primary malignant bone tumor commonly affecting children, adolescents, and young adults with a potential to metastasize to distal sites, most commonly lung. Here, we mapped the active chromatin landscapes of OS patients with varying extent of disease. We integrated histone H3 lysine acetylated chromatin (H3K27ac) profiles (n=13), chromatin accessibility profiles (n=11) and gene expression (n=13) of OS tumors from four different diseased states to understand the differences in their active chromatin profiles and its impact on molecular mechanisms driving the malignant phenotypes. Primary tumors that undergo metastasis (primary mets) have a distinct enhancer landscape compared to primary tumors that remain localized (localized) during the course of disease. The difference in chromatin activity shapes the transcriptional profile of OS patients. Some of the genes like PPP1R1B, PREX1 and IGF2BP1 whose role in OS pathogenesis and metastasis remains poorly understood, exhibit increased enhancer activity in primary mets along with higher RNA levels. Genome-wide loss-of-function screens also reveal these genes to be as selective dependencies in bone sarcomas, making them promising candidates for further investigation. Overall, differential chromatin activity in primary mets occurs in proximity of genes regulating actin cytoskeleton organization, cellular adhesion, and migration process suggestive of their role in facilitating OS metastasis. Thus, this data demonstrates that metastatic potential is intrinsically present in primary mets OS much before the occurrence of metastasis and when the cells are presented with favorable conditions to migrate and colonize at a distant site, they under undergo metastasis.
2023-12-09 | GSE234997 | GEO