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Chromosome 11q13.2, which contains genes cyclin D1 (CCND1), fibroblast growth factor 19 (FGF19), and Oral Cancer Overexpressed 1 (ORAOV1), is the most highly amplified peak in hepatocellular carcinoma (HCC). CCND1 and FGF19 have been already suggested as therapeutic targets of HCC, but the role of ORAOV1 in carcinogenesis of HCCs has not been reported.

This retrospective study investigated ORAOV1 expression using immunohistochemistry performed on tissue microarray blocks obtained from 259 HCC patients with curative resection, between 2000 and 2006. We assessed the prognostic significance of ORAOV1 expression by Kaplan–Meier method with log-rank test and Cox proportional hazards model. Also, we performed invasion, migration, apoptosis, and cell cycle assays in HCC cell lines, and evaluated the …