TBCRC 032 IB/II Multicenter Study: Molecular Insights to AR Antagonist and PI3K Inhibitor Efficacy in Patients with AR Metastatic Triple-Negative Breast Cancer.

Lehmann BD, Abramson VG, Sanders ME, Mayer EL, Haddad TC, Nanda R, Van Poznak C, Storniolo AM, Nangia JR, Gonzalez-Ericsson PI, Sanchez V, Johnson KN, Abramson RG, Chen SC, Shyr Y, Arteaga CL, Wolff AC, Pietenpol JA. TBCRC 032 IB/II Multicenter Study: Molecular Insights to AR Antagonist and PI3K Inhibitor Efficacy in Patients with AR Metastatic Triple-Negative Breast Cancer. Clinical cancer research : an official journal of the American Association for Cancer Research. 2020 Dec 1;26(26). 2111-2123. PMID: 31822498 [PubMed] PMCID: PMC7196503 NIHMSID: NIHMS1546228.

Abstract

Preclinical data demonstrating androgen receptor (AR)-positive (AR) triple-negative breast cancer (TNBC) cells are sensitive to AR antagonists, and PI3K inhibition catalyzed an investigator-initiated, multi-institutional phase Ib/II study TBCRC032. The trial investigated the safety and efficacy of the AR-antagonist enzalutamide alone or in combination with the PI3K inhibitor taselisib in patients with metastatic AR (≥10%) breast cancer.