Whole-genome sequencing identifies ADGRG6 enhancer mutations and FRS2 duplications as angiogenesis-related drivers in bladder cancer

Nat Commun. 2019 Feb 12;10(1):720. doi: 10.1038/s41467-019-08576-5.

Abstract

Bladder cancer is one of the most common and highly vascularized cancers. To better understand its genomic structure and underlying etiology, we conduct whole-genome and targeted sequencing in urothelial bladder carcinomas (UBCs, the most common type of bladder cancer). Recurrent mutations in noncoding regions affecting gene regulatory elements and structural variations (SVs) leading to gene disruptions are prevalent. Notably, we find recurrent ADGRG6 enhancer mutations and FRS2 duplications which are associated with higher protein expression in the tumor and poor prognosis. Functional assays demonstrate that depletion of ADGRG6 or FRS2 expression in UBC cells compromise their abilities to recruit endothelial cells and induce tube formation. Moreover, pathway assessment reveals recurrent alterations in multiple angiogenesis-related genes. These results illustrate a multidimensional genomic landscape that highlights noncoding mutations and SVs in UBC tumorigenesis, and suggest ADGRG6 and FRS2 as novel pathological angiogenesis regulators that would facilitate vascular-targeted therapies for UBC.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptor Proteins, Signal Transducing / genetics*
  • Cell Line, Tumor
  • DNA Mutational Analysis
  • Exome
  • Gene Dosage
  • Genetic Predisposition to Disease
  • Humans
  • Membrane Proteins / genetics*
  • Mutation*
  • Neovascularization, Pathologic
  • Receptors, G-Protein-Coupled / genetics*
  • Regulatory Sequences, Nucleic Acid
  • Urinary Bladder Neoplasms / blood supply*
  • Urinary Bladder Neoplasms / genetics*
  • Urinary Bladder Neoplasms / pathology
  • Whole Genome Sequencing

Substances

  • Adaptor Proteins, Signal Transducing
  • FRS2 protein, human
  • Membrane Proteins
  • Receptors, G-Protein-Coupled