Phase 1b study of berzosertib and cisplatin in patients with advanced triple-negative breast cancer

Melinda L. Telli, Sara M. Tolaney, Geoffrey I. Shapiro, Mark Middleton, Simon R. Lord, Hendrik Tobias Arkenau, Andrew Tutt, Vandana Abramson, Emma Dean, Tufia C. Haddad, Robert Wesolowski, Jordi Ferrer-Playan, Thomas Goddemeier, Thomas Grombacher, Jennifer Dong, Patricia Fleuranceau-Morel, Ivan Diaz-Padilla, Ruth Plummer

Research output: Contribution to journalArticlepeer-review


Platinum derivatives are commonly used for the treatment of patients with metastatic triple-negative breast cancer (TNBC). However, resistance often develops, leading to treatment failure. This expansion cohort (part C2) of the previously reported phase 1b trial (NCT02157792) is based on the recommended phase 2 dose of the combination of the ataxia-telangiectasia and Rad3-related (ATR) inhibitor berzosertib and cisplatin observed in patients with advanced solid tumors, including TNBC. Forty-seven patients aged ≥18 years with advanced TNBC received cisplatin (75 mg/m2; day 1) and berzosertib (140 mg/m2; days 2 and 9), in 21-day cycles. Berzosertib was well tolerated, with a similar toxicity profile to that reported previously for this combination. The overall response rate (90% confidence interval) was 23.4% (13.7, 35.8). No relevant associations were observed between response and gene alterations. Further studies combining ATR inhibitors with platinum compounds may be warranted in highly selected patient populations.

Original languageEnglish (US)
Article number45
Journalnpj Breast Cancer
Issue number1
StatePublished - Dec 2022

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Pharmacology (medical)


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