MicroRNA profiling in hepatocellular tumors is associated with clinical features and oncogene/tumor suppressor gene mutations

Hepatology : Official Journal of the American Association for the Study of Liver Diseases
Yannick LadeiroJessica Zucman-Rossi

Abstract

Molecular classifications defining new tumor subtypes have been recently refined with genetic and transcriptomic analyses of benign and malignant hepatocellular tumors. Here, we performed microRNA (miRNA) profiling in two series of fully annotated liver tumors to uncover associations between oncogene/tumor suppressor mutations and clinical and pathological features. Expression levels of 250 miRNAs in 46 benign and malignant hepatocellular tumors were compared to those of 4 normal liver samples with quantitative reverse-transcriptase polymerase chain reaction. miRNAs associated with genetic and clinical characteristics were validated in a second series of 43 liver tumor samples and 16 nontumor samples. miRNA profiling unsupervised analysis classified samples in unique clusters characterized by histological features (tumor/nontumor, P < 0.001; benign/malignant tumors, P < 0.01; inflammatory adenoma and focal nodular hyperplasia, P < 0.01), clinical characteristics [hepatitis B virus (HBV) infection, P < 0.001; alcohol consumption, P < 0.05], and oncogene/tumor suppressor gene mutations [beta-catenin, P < 0.01; hepatocyte nuclear factor 1alpha (HNF1alpha), P < 0.01]. Our study identified and validated miR-224 overexpression in all...Continue Reading

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