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  • Santo, E. E. (author)

Oncogenic activation of FOXR1 by 11q23 intrachromosomal deletion-fusions in neuroblastoma

  • Article/chapterEnglish2012

Publisher, publication year, extent ...

  • 2011-08-22
  • Springer Science and Business Media LLC,2012

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:a2d7b9eb-cade-497a-a0f1-c69ddf370a81
  • https://lup.lub.lu.se/record/2494829URI
  • https://doi.org/10.1038/onc.2011.344DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Neuroblastoma tumors frequently show loss of heterozygosity of chromosome 11q with a shortest region of overlap in the 11q23 region. These deletions are thought to cause inactivation of tumor suppressor genes leading to haploinsufficiency. Alternatively, micro-deletions could lead to gene fusion products that are tumor driving. To identify such events we analyzed a series of neuroblastomas by comparative genomic hybridization and single-nucleotide polymorphism arrays and integrated these data with Affymetrix mRNA profiling data with the bioinformatic tool R2 (http://r2.amc.nl). We identified three neuroblastoma samples with small interstitial deletions at 11q23, upstream of the forkhead-box R1 transcription factor (FOXR1). Genes at the proximal side of the deletion were fused to FOXR1, resulting in fusion transcripts of MLL-FOXR1 and PAFAH1B2-FOXR1. FOXR1 expression has only been detected in early embryogenesis. Affymetrix microarray analysis showed high FOXR1 mRNA expression exclusively in the neuroblastomas with micro-deletions and rare cases of other tumor types, including osteosarcoma cell line HOS. RNAi silencing of FOXR1 strongly inhibited proliferation of HOS cells and triggered apoptosis. Expression profiling of these cells and reporter assays suggested that FOXR1 is a negative regulator of fork-head box factor-mediated transcription. The neural crest stem cell line JoMa1 proliferates in culture conditional to activity of a MYC-ER transgene. Over-expression of the wild-type FOXR1 could functionally replace MYC and drive proliferation of JoMa1. We conclude that FOXR1 is recurrently activated in neuroblastoma by intrachromosomal deletion/fusion events, resulting in overexpression of fusion transcripts. Forkhead-box transcription factors have not been previously implicated in neuroblastoma pathogenesis. Furthermore, this is the first identification of intrachromosomal fusion genes in neuroblastoma. Oncogene (2012) 31, 1571-1581; doi:10.1038/onc.2011.344; published online 22 August 2011

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Ebus, M. E. (author)
  • Koster, J. (author)
  • Schulte, J. H. (author)
  • Lakeman, A. (author)
  • van Sluis, P. (author)
  • Vermeulen, J. (author)
  • Gisselsson Nord, DavidLund University,Lunds universitet,Avdelningen för klinisk genetik,Institutionen för laboratoriemedicin,Medicinska fakulteten,Division of Clinical Genetics,Department of Laboratory Medicine,Faculty of Medicine(Swepub:lu)kgen-dgi (author)
  • Øra, IngridLund University,Lunds universitet,Pediatrik, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Paediatrics (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine(Swepub:lu)molm-ior (author)
  • Lindner, S. (author)
  • Buckley, P. G. (author)
  • Stallings, R. L. (author)
  • Vandesompele, J. (author)
  • Eggert, A. (author)
  • Caron, H. N. (author)
  • Versteeg, R. (author)
  • Molenaar, J. J. (author)
  • Avdelningen för klinisk genetikInstitutionen för laboratoriemedicin (creator_code:org_t)

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  • In:Oncogene: Springer Science and Business Media LLC31:12, s. 1571-15811476-55940950-9232

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