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- W2022674844 abstract "Osteosarcoma is a common malignant bone tumor with a propensity to metastasize to the lungs. Epigenetic abnormalities have been demonstrated to underlie osteosarcoma development; however, the epigenetic mechanisms that are involved in metastasis are not yet clear. Here, we analyzed 2 syngeneic primary human osteosarcoma cell lines that exhibit disparate metastatic potential for differences in epigenetic modifications and expression. Using methylated DNA immunoprecipitation (MeDIP) and microarray expression analysis to screen for metastasis-associated genes, we identified Iroquois homeobox 1 (IRX1). In both human osteosarcoma cell lines and clinical osteosarcoma tissues, IRX1 overexpression was strongly associated with hypomethylation of its own promoter. Furthermore, experimental modulation of IRX1 in osteosarcoma cell lines profoundly altered metastatic activity, including migration, invasion, and resistance to anoikis in vitro, and influenced lung metastasis in murine models. These prometastatic effects of IRX1 were mediated by upregulation of CXCL14/NF-κB signaling. In serum from osteosarcoma patients, the presence of IRX1 hypomethylation in circulating tumor DNA reduced lung metastasis-free survival. Together, these results identify IRX1 as a prometastatic gene, implicate IRX1 hypomethylation as a potential molecular marker for lung metastasis, and suggest that epigenetic reversion of IRX1 activation may be beneficial for controlling osteosarcoma metastasis." @default.
- W2022674844 created "2016-06-24" @default.
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- W2022674844 date "2015-03-30" @default.
- W2022674844 modified "2023-10-15" @default.
- W2022674844 title "IRX1 hypomethylation promotes osteosarcoma metastasis via induction of CXCL14/NF-κB signaling" @default.
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- W2022674844 doi "https://doi.org/10.1172/jci78437" @default.
- W2022674844 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4463198" @default.
- W2022674844 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25822025" @default.
- W2022674844 hasPublicationYear "2015" @default.
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