FAK activity sustains intrinsic and acquired ovarian cancer resistance to platinum chemotherapy

Carlos Díaz Osterman, Duygu Ozmadenci, Elizabeth G. Kleinschmidt, Kristin N. Taylor, Allison M. Barrie, Shulin Jiang, Lisa M. Bean, Florian J. Sulzmaier, Christine Jean, Isabelle Tancioni, Kristen Anderson, Sean Uryu, Edward A. Cordasco, Jian Li, Xiao Lei Chen, Guo Fu, Marjaana Ojalill, Pekka Rappu, Jyrki Heino, Adam M. MarkGuorong Xu, Kathleen M. Fisch, Vihren N. Kolev, David T. Weaver, Jonathan A. Pachter, Balázs Győrffy, Michael T. McHale, Denise C. Connolly, Alfredo Molinolo, Dwayne G. Stupack, David D. Schlaepfer

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

Gene copy number alterations, tumor cell stemness, and the development of platinum chemotherapy resistance contribute to high-grade serous ovarian cancer (HGSOC) recurrence. Stem phenotypes involving Wnt-β-catenin, aldehyde dehydrogenase activities, intrinsic platinum resistance, and tumorsphere formation are here associated with spontaneous gains in Kras, Myc and FAK (KMF) genes in a new aggressive murine model of ovarian cancer. Adhesion-independent FAK signaling sustained KMF and human tumorsphere proliferation as well as resistance to cisplatin cytotoxicity. Platinum-resistant tumorspheres can acquire a dependence on FAK for growth. Accordingly, increased FAK tyrosine phosphorylation was observed within HGSOC patient tumors surviving neo-adjuvant chemotherapy. Combining a FAK inhibitor with platinum overcame chemoresistance and triggered cell apoptosis. FAK transcriptomic analyses across knockout and reconstituted cells identified 135 targets, elevated in HGSOC, that were regulated by FAK activity and β-catenin including Myc, pluripotency and DNA repair genes. These studies reveal an oncogenic FAK signaling role supporting chemoresistance.

Original languageEnglish
Article numbere47327
JournaleLife
Volume8
DOIs
StatePublished - Sep 2019

Keywords

  • Animals
  • Antineoplastic Agents/pharmacology
  • Cisplatin/pharmacology
  • Disease Models, Animal
  • Drug Resistance, Neoplasm
  • Female
  • Focal Adhesion Kinase 1/metabolism
  • Humans
  • Mice
  • Ovarian Neoplasms/drug therapy
  • Platinum/pharmacology
  • Proto-Oncogene Proteins c-myc/metabolism
  • Proto-Oncogene Proteins p21(ras)/metabolism
  • Signal Transduction
  • Stem Cells

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