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PALOMA-3: Phase III trial of fulvestrant with or without palbociclib in premenopausal and postmenopausal women with hormone receptor–positive, human epidermal growth factor receptor 2–negative metastatic breast cancer that progressed on prior endocrine therapy—safety and efficacy in asian patients

Authors
Iwata, H.[Iwata, H.]Im, S.-A.[Im, S.-A.]Masuda, N.[Masuda, N.]Im, Y.-H.[Im, Y.-H.]Inoue, K.[Inoue, K.]Rai, Y.[Rai, Y.]Nakamura, R.[Nakamura, R.]Kim, J.H.[Kim, J.H.]Hoffman, J.T.[Hoffman, J.T.]Zhang, K.[Zhang, K.]Giorgetti, C.[Giorgetti, C.]Iyer, S.[Iyer, S.]Schnell, P.T.[Schnell, P.T.]Bartlett, C.H.[Bartlett, C.H.]Ro, J.[Ro, J.]
Issue Date
2017
Publisher
American Society of Clinical Oncology
Citation
Journal of Global Oncology, v.3, no.4, pp.289 - 303
Indexed
SCOPUS
Journal Title
Journal of Global Oncology
Volume
3
Number
4
Start Page
289
End Page
303
URI
https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/30946
DOI
10.1200/JGO.2016.008318
ISSN
2378-9506
Abstract
Purpose To assess efficacy and safety of palbociclib plus fulvestrant in Asians with endocrine therapy–resistant metastatic breast cancer. Patients and Methods The Palbociclib Ongoing Trials in the Management of Breast Cancer 3 (PALOMA-3) trial, a double-blind phase III study, included 521 patients with hormone receptor–positive/human epidermal growth factor receptor 2–negative metastatic breast cancer with disease progression on endocrine therapy. Patient-reported outcomes (PROs) were assessed on study treatment and at the end of treatment. Results This preplanned subgroup analysis of the PALOMA-3 study included premenopausal and postmenopausal Asians taking palbociclib plus fulvestrant (n = 71) or placebo plus fulvestrant (n = 31). Palbociclib plus fulvestrant improved progression-free survival (PFS) compared with fulvestrant alone. Median PFS was not reached with palbociclib plus fulvestrant (95% CI, 9.2 months to not reached) but was 5.8 months with placebo plus fulvestrant (95% CI, 3.5 to 9.2 months; hazard ratio, 0.485; 95% CI, 0.270 to 0.869; P = .0065). The most common all-cause grade 3 or 4 adverse events in the palbociclib arm were neutropenia (92%) and leukopenia (29%); febrile neutropenia occurred in 4.1% of patients. Within-patient mean trough concentration comparisons across subgroups indicated similar palbociclib exposure between Asians and non-Asians. Global quality of life was maintained; no statistically significant changes from baseline were observed for patient-reported outcome scores with palbociclib plus fulvestrant. Conclusion This is the first report, to our knowledge, showing that palbociclib plus fulvestrant improves PFS in asian patients. Palbociclib plus fulvestrant was well tolerated in this study. © 2017 by American Society of Clinical Oncology Licensed under the Creative Commons Attribution 4.0 License
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