Cell Reports (May 2019)

The Genomic and Immune Landscapes of Lethal Metastatic Breast Cancer

  • Leticia De Mattos-Arruda,
  • Stephen-John Sammut,
  • Edith M. Ross,
  • Rachael Bashford-Rogers,
  • Erez Greenstein,
  • Havell Markus,
  • Sandro Morganella,
  • Yvonne Teng,
  • Yosef Maruvka,
  • Bernard Pereira,
  • Oscar M. Rueda,
  • Suet-Feung Chin,
  • Tania Contente-Cuomo,
  • Regina Mayor,
  • Alexandra Arias,
  • H. Raza Ali,
  • Wei Cope,
  • Daniel Tiezzi,
  • Aliakbar Dariush,
  • Tauanne Dias Amarante,
  • Dan Reshef,
  • Nikaoly Ciriaco,
  • Elena Martinez-Saez,
  • Vicente Peg,
  • Santiago Ramon y Cajal,
  • Javier Cortes,
  • George Vassiliou,
  • Gad Getz,
  • Serena Nik-Zainal,
  • Muhammed Murtaza,
  • Nir Friedman,
  • Florian Markowetz,
  • Joan Seoane,
  • Carlos Caldas

Journal volume & issue
Vol. 27, no. 9
pp. 2690 – 2708.e10

Abstract

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Summary: The detailed molecular characterization of lethal cancers is a prerequisite to understanding resistance to therapy and escape from cancer immunoediting. We performed extensive multi-platform profiling of multi-regional metastases in autopsies from 10 patients with therapy-resistant breast cancer. The integrated genomic and immune landscapes show that metastases propagate and evolve as communities of clones, reveal their predicted neo-antigen landscapes, and show that they can accumulate HLA loss of heterozygosity (LOH). The data further identify variable tumor microenvironments and reveal, through analyses of T cell receptor repertoires, that adaptive immune responses appear to co-evolve with the metastatic genomes. These findings reveal in fine detail the landscapes of lethal metastatic breast cancer. : De Mattos-Arruda et al. profiled multiple metastases from autopsies of patients with therapy-resistant breast cancer, showing that multi-clonal spreading occurs in a small number of founder events. The analysis characterizes predicted neo-antigen landscapes, tumor microenvironments, and accumulation of HLA LOH. T cell immune responses appear to co-evolve with metastatic cancer genomes. Keywords: breast cancer, metastases, stem mutations, clade mutations, private mutations, genomic landscapes, immune landscapes, metastatic phylogenies, immunoediting, TCR repertoire