Integrative omics study on bone metastatic tumors using clinical samples for clinical applications

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To reveal the molecular backgrounds of metastatic bone tumor, we created the expression profiles of primary tumor tissues and bone metastatic tissues, which were obtained and storaged at the time of surgery. Lung cancers, breast cancers, hepatocellular carcinomas, colorectal cancers, pancreatic cancers, gastric cancers, renal cell carcinomas, and parotid glad tumors were included this study. Protein expression profiles were created by two-dimensional difference gel electrophoresis, and PROTOMAP. Global microRNA expression was examined by the microarray. We identified genes whose expression levels were aberrantly regulated in the bone-metastatic tumors compared with the primary tumors. The functional significances of the identified genes were verified by the in vitro experiments.