Proteogenomic analysis of chemo-refractory high-grade serous ovarian cancer

Cell. 2023 Aug 3;186(16):3476-3498.e35. doi: 10.1016/j.cell.2023.07.004.

Abstract

To improve the understanding of chemo-refractory high-grade serous ovarian cancers (HGSOCs), we characterized the proteogenomic landscape of 242 (refractory and sensitive) HGSOCs, representing one discovery and two validation cohorts across two biospecimen types (formalin-fixed paraffin-embedded and frozen). We identified a 64-protein signature that predicts with high specificity a subset of HGSOCs refractory to initial platinum-based therapy and is validated in two independent patient cohorts. We detected significant association between lack of Ch17 loss of heterozygosity (LOH) and chemo-refractoriness. Based on pathway protein expression, we identified 5 clusters of HGSOC, which validated across two independent patient cohorts and patient-derived xenograft (PDX) models. These clusters may represent different mechanisms of refractoriness and implicate putative therapeutic vulnerabilities.

Keywords: chemorefractory; high-grade serous ovarian cancer; machine learning; mass spectrometry; multiple reaction monitoring; platinum; precision oncology; predictive biomarker; prognostic biomarker; proteogenomic.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Cystadenocarcinoma, Serous* / drug therapy
  • Cystadenocarcinoma, Serous* / genetics
  • Female
  • Humans
  • Ovarian Neoplasms* / drug therapy
  • Ovarian Neoplasms* / genetics
  • Proteogenomics*