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BAP1 loss defines a new class of renal cell carcinoma.

Nature genetics | Jun 10, 2012

The molecular pathogenesis of renal cell carcinoma (RCC) is poorly understood. Whole-genome and exome sequencing followed by innovative tumorgraft analyses (to accurately determine mutant allele ratios) identified several putative two-hit tumor suppressor genes, including BAP1. The BAP1 protein, a nuclear deubiquitinase, is inactivated in 15% of clear cell RCCs. BAP1 cofractionates with and binds to HCF-1 in tumorgrafts. Mutations disrupting the HCF-1 binding motif impair BAP1-mediated suppression of cell proliferation but not deubiquitination of monoubiquitinated histone 2A lysine 119 (H2AK119ub1). BAP1 loss sensitizes RCC cells in vitro to genotoxic stress. Notably, mutations in BAP1 and PBRM1 anticorrelate in tumors (P = 3 × 10(-5)), [corrected] and combined loss of BAP1 and PBRM1 in a few RCCs was associated with rhabdoid features (q = 0.0007). BAP1 and PBRM1 regulate seemingly different gene expression programs, and BAP1 loss was associated with high tumor grade (q = 0.0005). Our results establish the foundation for an integrated pathological and molecular genetic classification of RCC, paving the way for subtype-specific treatments exploiting genetic vulnerabilities.

Pubmed ID: 22683710 RIS Download

Mesh terms: Aged | Carcinoma, Renal Cell | Cell Growth Processes | Cells, Cultured | Exome | Female | Gene Expression | Host Cell Factor C1 | Humans | Kidney Neoplasms | Male | Middle Aged | Mutation | Nuclear Proteins | Protein Interaction Domains and Motifs | Transcription Factors | Tumor Suppressor Proteins | Ubiquitin Thiolesterase

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Associated grants

  • Agency: NCI NIH HHS, Id: P30 CA142543
  • Agency: NCI NIH HHS, Id: R01 CA129387
  • Agency: NIGMS NIH HHS, Id: R01 GM094575
  • Agency: NCI NIH HHS, Id: 1P30CA142543

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