Multiple mechanisms of MYCN dysregulation in Wilms tumour.
Författare
Summary, in English
Genomic gain of the proto-oncogene transcription factor gene MYCN is associated with poor prognosis in several childhood cancers. Here we present a comprehensive copy number analysis of MYCN in Wilms tumour (WT), demonstrating that gain of this gene is associated with anaplasia and with poorer relapse-free and overall survival, independent of histology. Using whole exome and gene-specific sequencing, together with methylation and expression profiling, we show that MYCN is targeted by other mechanisms, including a recurrent somatic mutation, P44L, and specific DNA hypomethylation events associated with MYCN overexpression in tumours with high risk histologies. We describe parallel evolution of genomic copy number gain and point mutation of MYCN in the contralateral tumours of a remarkable bilateral case in which independent contralateral mutations of TP53 also evolve over time. We report a second bilateral case in which MYCN gain is a germline aberration. Our results suggest a significant role for MYCN dysregulation in the molecular biology of Wilms tumour. We conclude that MYCN gain is prognostically significant, and suggest that the novel P44L somatic variant is likely to be an activating mutation.
Avdelning/ar
- Avdelningen för klinisk genetik
- BioCARE: Biomarkers in Cancer Medicine improving Health Care, Education and Innovation
Publiceringsår
2015
Språk
Engelska
Sidor
7232-7243
Publikation/Tidskrift/Serie
Oncotarget
Volym
6
Issue
9
Fulltext
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Impact Journals
Ämne
- Cancer and Oncology
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1949-2553