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      Network Modeling of microRNA-mRNA Interactions in Neuroblastoma Tumorigenesis Identifies miR-204 as a Direct Inhibitor of MYCN.

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          Abstract

          Neuroblastoma is a pediatric cancer of the sympathetic nervous system where MYCN amplification is a key indicator of poor prognosis. However, mechanisms by which MYCN promotes neuroblastoma tumorigenesis are not fully understood. In this study, we analyzed global miRNA and mRNA expression profiles of tissues at different stages of tumorigenesis from TH-MYCN transgenic mice, a model of MYCN-driven neuroblastoma. On the basis of a Bayesian learning network model in which we compared pretumor ganglia from TH-MYCN+/+ mice to age-matched wild-type controls, we devised a predicted miRNA-mRNA interaction network. Among the miRNA-mRNA interactions operating during human neuroblastoma tumorigenesis, we identified miR-204 as a tumor suppressor miRNA that inhibited a subnetwork of oncogenes strongly associated with MYCN-amplified neuroblastoma and poor patient outcome. MYCN bound to the miR-204 promoter and repressed miR-204 transcription. Conversely, miR-204 directly bound MYCN mRNA and repressed MYCN expression. miR-204 overexpression significantly inhibited neuroblastoma cell proliferation in vitro and tumorigenesis in vivo Together, these findings identify novel tumorigenic miRNA gene networks and miR-204 as a tumor suppressor that regulates MYCN expression in neuroblastoma tumorigenesis.Significance: Network modeling of miRNA-mRNA regulatory interactions in a mouse model of neuroblastoma identifies miR-204 as a tumor suppressor and negative regulator of MYCN. Cancer Res; 78(12); 3122-34. ©2018 AACR.

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          Author and article information

          Journal
          Cancer Res.
          Cancer research
          American Association for Cancer Research (AACR)
          1538-7445
          0008-5472
          Jun 15 2018
          : 78
          : 12
          Affiliations
          [1 ] Children's Cancer Institute Australia, Lowy Cancer Research Centre, University of New South Wales, Randwick, New South Wales, Australia.
          [2 ] School of Women's & Children's Health, University of New South Wales Australia, Randwick, New South Wales, Australia.
          [3 ] Center for Medical Genetics (CMGG), Ghent University, Medical Research Building (MRB1), Ghent, Belgium.
          [4 ] Biological Resource Imaging Laboratory, the University of New South Wales, Kensington, New South Wales, Australia.
          [5 ] Centre for Childhood Cancer Research, University of New South Wales, Randwick, New South Wales, Australia.
          [6 ] Children's Cancer Institute Australia, Lowy Cancer Research Centre, University of New South Wales, Randwick, New South Wales, Australia. BCheung@ccia.org.au g.marshall@unsw.edu.au.
          [7 ] Kids Cancer Centre, Sydney Children's Hospital, Randwick, New South Wales, Australia.
          Article
          0008-5472.CAN-17-3034
          10.1158/0008-5472.CAN-17-3034
          29610116

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