Abstract OT3-03-02: A phase 2, open-label, single-arm, multi-center study of talazoparib for neoadjuvant treatment of germline BRCA1/2 mutation patients with early-stage triple-negative breast cancer (TNBC)
2019
Background: Approximately 15% of all breast cancers are triple negative and deleterious BRCA1/2 mutations are found in ˜11% of unselected TNBC. In the phase 3 EMBRACA trial (NCT01945775), the poly (ADP-ribose) polymerase (PARP) inhibitor talazoparib was superior to chemotherapy in prolonging progression-free survival in BRCA1/2 mutation patients with advanced breast cancer. A recent pilot study (NCT02282345) of 20 patients, explored the feasibility of neoadjuvant talazoparib in BRCA1/2 mutation patients; pathologic complete response (pCR) was reported at 53% with 6 months of single agent talazoparib. Trial Design: This phase 2, single-arm, open-label, multi-center study has a Simon 2-stage design. Eligible pts have stage I-III invasive TNBC (ER and PR Funding: This study is sponsored by Pfizer, Inc. Citation Format: Litton J, Symmans F, Gogineni K, Saltzman M, Telli ML, Usha L, Chakrabarti J, Tudor IC, Quek RG, Czibere A. A phase 2, open-label, single-arm, multi-center study of talazoparib for neoadjuvant treatment of germline BRCA1/2 mutation patients with early-stage triple-negative breast cancer (TNBC) [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr OT3-03-02.
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