Recurrent internal tandem duplications of BCOR in clear cell sarcoma of the kidney

Angshumoy Roy, Vijetha Kumar, Barry Zorman, Erica Fang, Katherine M. Haines, HarshaVardhan Doddapaneni, Oliver A. Hampton, Simon White, Abhishek A. Bavle, Nimesh R. Patel, Karen W. Eldin, M. John Hicks, Dinesh Rakheja, Patrick J Leavey, Stephen X Skapek, James F Amatruda, Jed G. Nuchtern, Murali M. Chintagumpala, David A. Wheeler, Sharon E. PlonPavel Sumazin, D. Williams Parsons

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

The X-linked BCL-6 co-repressor (BCOR) gene encodes a key constituent of a variant polycomb repressive complex (PRC) that is mutated or translocated in human cancers. Here we report on the identification of somatic internal tandem duplications (ITDs) clustering in the C terminus of BCOR in 23 of 27 (85%) pediatric clear cell sarcomas of the kidney (CCSK) from two independent cohorts. We profile CCSK tumours using a combination of whole-exome, transcriptome and targeted sequencing. Identical ITD mutations are found in primary and relapsed tumour pairs but not in adjacent normal kidney or blood. Mutant BCOR transcripts and proteins are markedly upregulated in ITD-positive tumours. Transcriptome analysis of ITD-positive CCSKs reveals enrichment for PRC2-regulated genes and similarity to undifferentiated sarcomas harbouring BCOR-CCNB3 fusions. The discovery of recurrent BCOR ITDs defines a major oncogenic event in this childhood sarcoma with significant implications for diagnostic and therapeutic approaches to this tumour.

Original languageEnglish (US)
Article number8891
JournalNature communications
Volume6
DOIs
StatePublished - Nov 17 2015

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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