RT Journal Article
T1 Palbociclib in combination with endocrine therapy versus capecitabine in hormonal receptor-positive, human epidermal growth factor 2-negative, aromatase inhibitor-resistant metastatic breast cancer: a phase III randomised controlled trial-PEARL.
A1 Martin, M
A1 Zielinski, C
A1 Ruiz-Borrego, M
A1 Carrasco, E
A1 Turner, N
A1 Ciruelos, E M
A1 Muñoz, M
A1 Bermejo, B
A1 Margeli, M
A1 Anton, A
A1 Kahan, Z
A1 Csoszi, T
A1 Casas, M I
A1 Murillo, L
A1 Morales, S
A1 Alba, E
A1 Gal-Yam, E
A1 Guerrero-Zotano, A
A1 Calvo, L
A1 de-la-Haba-Rodriguez, J
A1 Ramos, M
A1 Alvarez, I
A1 Garcia-Palomo, A
A1 Huang-Bartlett, C
A1 Koehler, M
A1 Caballero, R
A1 Corsaro, M
A1 Huang, X
A1 Garcia-Saenz, J A
A1 Chacon, J I
A1 Swift, C
A1 Thallinger, C
A1 Gil-Gil, M
K1 HER2-negative
K1 Capecitabine
K1 Endocrine therapy
K1 Hormone receptor-positive
K1 Metastatic breast cancer
K1 Palbociclib
AB Palbociclib plus endocrine therapy (ET) is the standard treatment of hormone receptor-positive and human epidermal growth factor receptor 2-negative, metastatic breast cancer (MBC). However, its efficacy has not been compared with that of chemotherapy in a phase III trial. PEARL is a multicentre, phase III randomised study in which patients with aromatase inhibitor (AI)-resistant MBC were included in two consecutive cohorts. In cohort 1, patients were randomised 1 : 1 to palbociclib plus exemestane or capecitabine. On discovering new evidence about estrogen receptor-1 (ESR1) mutations inducing resistance to AIs, the trial was amended to include cohort 2, in which patients were randomised 1 : 1 between palbociclib plus fulvestrant and capecitabine. The stratification criteria were disease site, prior sensitivity to ET, prior chemotherapy for MBC, and country of origin. Co-primary endpoints were progression-free survival (PFS) in cohort 2 and in wild-type ESR1 patients (cohort 1 + cohort 2). ESR1 hotspot mutations were analysed in baseline circulating tumour DNA. From March 2014 to July 2018, 296 and 305 patients were included in cohort 1 and cohort 2, respectively. Palbociclib plus ET was not superior to capecitabine in both cohort 2 [median PFS: 7.5 versus 10.0 months; adjusted hazard ratio (aHR): 1.13; 95% confidence interval (CI): 0.85-1.50] and wild-type ESR1 patients (median PFS: 8.0 versus 10.6 months; aHR: 1.11; 95% CI: 0.87-1.41). The most frequent grade 3-4 toxicities with palbociclib plus exemestane, palbociclib plus fulvestrant and capecitabine, respectively, were neutropenia (57.4%, 55.7% and 5.5%), hand/foot syndrome (0%, 0% and 23.5%), and diarrhoea (1.3%, 1.3% and 7.6%). Palbociclib plus ET offered better quality of life (aHR for time to deterioration of global health status: 0.67; 95% CI: 0.53-0.85). There was no statistical superiority of palbociclib plus ET over capecitabine with respect to PFS in MBC patients resistant to AIs. Palbociclib plus ET showed a better safety profile and improved quality of life.
PB Elsevier
YR 2020
FD 2020-12-29
LK http://hdl.handle.net/10668/16888
UL http://hdl.handle.net/10668/16888
LA en
NO Martin M, Zielinski C, Ruiz-Borrego M, Carrasco E, Turner N, Ciruelos EM, et al. Palbociclib in combination with endocrine therapy versus capecitabine in hormonal receptor-positive, human epidermal growth factor 2-negative, aromatase inhibitor-resistant metastatic breast cancer: a phase III randomised controlled trial-PEARL. Ann Oncol. 2021 Apr;32(4):488-499
DS RISalud
RD Apr 7, 2025