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  • A LIN28B-RAN-AURKA Signalin...
    Schnepp, Robert W.; Khurana, Priya; Attiyeh, Edward F.; Raman, Pichai; Chodosh, Sara E.; Oldridge, Derek A.; Gagliardi, Maria E.; Conkrite, Karina L.; Asgharzadeh, Shahab; Seeger, Robert C.; Madison, Blair B.; Rustgi, Anil K.; Maris, John M.; Diskin, Sharon J.

    Cancer cell, 11/2015, Volume: 28, Issue: 5
    Journal Article

    A more complete understanding of aberrant oncogenic signaling in neuroblastoma, a malignancy of the developing sympathetic nervous system, is paramount to improving patient outcomes. Recently, we identified LIN28B as an oncogenic driver in high-risk neuroblastoma. Here, we identify the oncogene RAN as a LIN28B target and show regional gain of chromosome 12q24 as an additional somatic alteration resulting in increased RAN expression. We show that LIN28B influences RAN expression by promoting RAN Binding Protein 2 expression and by directly binding RAN mRNA. Further, we demonstrate a convergence of LIN28B and RAN signaling on Aurora kinase A activity. Collectively, these findings demonstrate that LIN28B-RAN-AURKA signaling drives neuroblastoma oncogenesis, suggesting that this pathway may be amenable to therapeutic targeting. Display omitted •LIN28B and regional gain of chromosome 12q24 mediate RAN oncogene overexpression•RAN promotes cell proliferation in neuroblastoma•LIN28B promotes RAN levels by binding RAN mRNA and via RAN binding protein 2•LIN28B promotes Aurora kinase A expression in a let-7-dependent manner Extending from prior identification of LIN28B as an oncogenic driver in high-risk neuroblastoma, Schnepp et al. show that LIN28B regulates the RAN level directly by mRNA binding and indirectly via let-7-regulated RANBP2. LIN28B and RAN signaling converge on Aurora kinase A, suggesting therapeutic potential.