Multiomics analysis of serial PARP inhibitor treated metastatic TNBC inform on rational combination therapies

Marilyne Labrie, Allen Li, Allison Creason, Courtney Betts, Jamie Keck, Brett Johnson, Shamilene Sivagnanam, Christopher Boniface, Hongli Ma, Aurora Blucher, Young Hwan Chang, Koei Chin, Jacqueline Vuky, Alexander R. Guimaraes, Molly Downey, Jeong Youn Lim, Lina Gao, Kiara Siex, Swapnil Parmar, Annette KolodziePaul T. Spellman, Jeremy Goecks, Lisa M. Coussens, Christopher L. Corless, Raymond Bergan, Joe W. Gray, Gordon B. Mills, Zahi I. Mitri

Research output: Contribution to journalArticlepeer-review

Abstract

In a pilot study, we evaluated the feasibility of real-time deep analysis of serial tumor samples from triple negative breast cancer patients to identify mechanisms of resistance and treatment opportunities as they emerge under therapeutic stress engendered by poly-ADP-ribose polymerase (PARP) inhibitors (PARPi). In a BRCA-mutant basal breast cancer exceptional long-term survivor, a striking tumor destruction was accompanied by a marked infiltration of immune cells containing CD8 effector cells, consistent with pre-clinical evidence for association between STING mediated immune activation and benefit from PARPi and immunotherapy. Tumor cells in the exceptional responder underwent extensive protein network rewiring in response to PARP inhibition. In contrast, there were minimal changes in the ecosystem of a luminal androgen receptor rapid progressor, likely due to indifference to the effects of PARP inhibition. Together, identification of PARPi-induced emergent changes could be used to select patient specific combination therapies, based on tumor and immune state changes.

Original languageEnglish (US)
Article number92
Journalnpj Precision Oncology
Volume5
Issue number1
DOIs
StatePublished - Dec 2021

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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