Pellegrino B, Cavanna L, Boggiani D, Zamagni C, Frassoldati A, Schirone A, Caldara A, Rocca A, Gori S, Piacentini F, Berardi R, Brandes AA, Foglietta J, Villa F, Todeschini R, Tognetto M, Naldi N, Bortesi B, Montemurro F, Ardizzoni A, Boni L, and Musolino A
Background: The combination of a microtubule inhibitor (eribulin) with a nucleoside analog (gemcitabine) may synergistically induce tumor cell death, particularly in triple negative breast cancer (TNBC) characterized by high cell proliferation, aggressive behavior, and chemo-resistance., Patients and Methods: This is an open-label, multicenter phase II study evaluating the combination of eribulin (0.88 mg/m 2 ) plus gemcitabine (1000 mg/m 2 ) on days 1 and 8 of a 21-day cycle as either first- or second-line treatment of locally advanced or metastatic TNBC. The primary endpoint was the objective response for evaluable patients. A prospective, molecular correlative study was carried out to assess the role of germinal BRCA pathogenic variants and single nucleotide polymorphisms (SNPs) in predicting efficacy and toxicity of the combination regimen., Results: From July 2013 to September 2016, 83 evaluable patients were enrolled. They received a median number of six cycles of treatment. An overall response rate (ORR) of 37.3% (31 patients) was observed, with a complete response rate of 2.4% and a partial response rate of 34.9%; the clinical benefit rate was 48.8%. With a median follow-up of 28.8 months, the median response duration was 6.6 months, the median progression-free survival (PFS) was 5.1 months, and the median overall survival (OS) was 14.5 months. The most common grade 3-4 adverse events were aminotransferase elevation (in 25% of the patients) and neutropenia (in 23.8%). Women with BRCA1/2 pathogenic variants were associated with worse ORR, PFS, and OS than BRCA1/2 wild-type carriers. CYP3A4 and FGD4 SNPs were associated with increased risk of liver toxicity. Three different SNPs in CDA∗2, RRM1, and CYP2C8 genes were significantly associated with poorer OS., Conclusions: The combination of eribulin and gemcitabine showed promising activity and a moderate toxicity profile in metastatic TNBC. BRCA status and pharmacogenetics tests may help identify patients with high probability of response with negligible toxicity., Eudract Number: 2012-003505-10., Competing Interests: Disclosure CZ reports grants, personal fees, and non-financial support from Roche; grants from Eisai; grants, personal fees, and non-financial support from Novartis; grants, personal fees, and non-financial support from AstraZeneca; grants, personal fees, and non-financial support from Pfizer; grants from PharmaMar; grants and personal fees from Amgen; grants and personal fees from Tesaro; personal fees from QuintilesIMS; grants from Pierre Fabre; grants from Istituto Gentili; grants from Takeda; grants from TEVA; grants from Medivation; grants from AbbVie; grants from Array BioPharma; grants from Morphotek; grants from Synthon; grants from Seattle Genetics; grants from Lilly, grants from Celgene, outside the submitted work. AF reports personal fees from Roche, personal fees from Novartis, personal fees from Pfizer, personal fees from Lilly, outside the submitted work. AS reports personal fees from Novartis, personal fees from Amgen, personal fees from Istituto Gentili, outside the submitted work. AR reports personal fees from Pfizer, personal fees from Novartis, personal fees from Eli Lilly, personal fees from Roche, outside the submitted work. FP reports personal fees from Novartis, personal fees from Pfizer, personal fees from Amgen, outside the submitted work. FM reports personal fees from Roche, personal fees from Novartis, personal fees from Pfizer, personal fees from Pierre Fabre, personal fees from Eli Lilly, personal fees from Daiichi Sankyo, personal fees from Astra Zeneca, outside the submitted work. AA reports grants and personal fees from BMS, grants from MSD, grants from Roche, grants from Astra Zeneca, grants from Eli Lilly, grants from Takeda, grants from Bayer, outside the submitted work. AM reports grants and other from Eisai Co., Ltd, during the conduct of the study; grants and personal fees from Roche; personal fees from MacroGenics; personal fees from Merck; grants and personal fees from Lilly; grants from Pfizer, outside the submitted work. All other authors have declared no conflicts of interest. Disclaimer Any views, opinions, findings, conclusions, or recommendations expressed in this material are those solely of the authors and do not necessarily reflect those of ESMO, Roche, or Eisai., (Copyright © 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.)