1
|
Walsh EM, Gucalp A, Patil S, Edelweiss M, Ross DS, Razavi P, Modi S, Iyengar NM, Sanford R, Troso-Sandoval T, Gorsky M, Bromberg J, Drullinsky P, Lake D, Wong S, DeFusco PA, Lamparella N, Gupta R, Tabassum T, Boyle LA, Arumov A, Traina TA. Adjuvant enzalutamide for the treatment of early-stage androgen-receptor positive, triple-negative breast cancer: a feasibility study. Breast Cancer Res Treat 2022; 195:341-351. [PMID: 35986801 PMCID: PMC10506398 DOI: 10.1007/s10549-022-06669-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 06/29/2022] [Indexed: 11/02/2022]
Abstract
PURPOSE Chemotherapy with or without immunotherapy remains the mainstay of treatment for triple-negative breast cancer (TNBC). A subset of TNBCs express the androgen receptor (AR), representing a potential new therapeutic target. This study assessed the feasibility of adjuvant enzalutamide, an AR antagonist, in early-stage, AR-positive (AR +) TNBC. METHODS This study was a single-arm, open-label, multicenter trial in which patients with stage I-III, AR ≥ 1% TNBC who had completed standard-of-care therapy were treated with enzalutamide 160 mg/day orally for 1 year. The primary objective of this study was to evaluate the feasibility of 1 year of adjuvant enzalutamide, defined as the treatment discontinuation rate of enzalutamide due to toxicity, withdrawal of consent, or other events related to tolerability. Secondary endpoints included disease-free survival (DFS), overall survival (OS), safety, and genomic features of recurrent tumors. RESULTS Fifty patients were enrolled in this study. Thirty-five patients completed 1 year of therapy, thereby meeting the prespecified trial endpoint for feasibility. Thirty-two patients elected to continue with an optional second year of treatment. Grade ≥ 3 treatment-related adverse events were uncommon. The 1-year, 2-year, and 3-year DFS were 94%, 92% , and 80%, respectively. Median OS has not been reached. CONCLUSION This clinical trial demonstrates that adjuvant enzalutamide is a feasible and well-tolerated regimen in patients with an early-stage AR + TNBC. Randomized trials in the metastatic setting may inform patient selection through biomarker development; longer follow-up is needed to determine the effect of anti-androgens on DFS and OS in this patient population.
Collapse
Affiliation(s)
- Elaine M Walsh
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA.
| | - Ayca Gucalp
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Sujata Patil
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Marcia Edelweiss
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Dara S Ross
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Pedram Razavi
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Shanu Modi
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Neil M Iyengar
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Rachel Sanford
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Tiffany Troso-Sandoval
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Mila Gorsky
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Jacqueline Bromberg
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Pamela Drullinsky
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Diana Lake
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Serena Wong
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | | | | | - Ranja Gupta
- Lehigh Valley Health Network Cancer Institute, Allentown, PA, USA
| | - Tasmila Tabassum
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Leigh Ann Boyle
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Artavazd Arumov
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| | - Tiffany A Traina
- Department of Medicine, Breast Medicine Service, Memorial Sloan Kettering Cancer Center, 300 East 66thStreet, New York, NY, USA
| |
Collapse
|