Palbociclib in Combination With Fulvestrant or Letrozole in Patients With ER+, HER2- Advanced Breast Cancer

Summary

This is an international, randomized, open-label, controlled, multicenter phase II clinical trial to investigate and compare the safety and efficacy of palbociclib combined with fulvestrant or letrozole in women with ER+, HER2- locally advanced or metastatic breast cancer.

Timeline

Start

2015-08

Primary completion

2020-01

Completion

2020-01

Outcome

Missed primary endpoint

paper hazard ratio, 1.13; 95% CI, 0.89-1.45; P = .32). PMID 34617955 ↗

paper failed to identify an improvement in progression-free survival with this regimen over letrozole-palbociclib PMID 34617955 ↗

Publications

• Di Cosimo S, Perez-Garcia JM, Bellet M, Dalenc F, Gil Gil MJ, Ruiz Borrego M, Gavila J, Sampayo-Cordero M, Aguirre E, Schmid P, Marme F, Gligorov J, Schneeweiss A, Albanell J, Zamora P, Wheatley D, Martinez-De Duenas E, Caranana V, Amillano K, Mina L, Malfettone A, Cortes J, Llombart-Cussac A. Palbociclib with Fulvestrant or Letrozole in Endocrine-Sensitive Patients with HR-Positive/HER2-Negative Advanced Breast Cancer: A Detailed Safety Analysis of the Randomized PARSIFAL Trial. Oncologist. 2023 Jan 18;28(1):23-32. doi: 10.1093/oncolo/oyac205.
• Llombart-Cussac A, Perez-Garcia JM, Bellet M, Dalenc F, Gil-Gil M, Ruiz-Borrego M, Gavila J, Sampayo-Cordero M, Aguirre E, Schmid P, Marme F, Di Cosimo S, Gligorov J, Schneeweiss A, Albanell J, Zamora P, Wheatley D, Martinez-de Duenas E, Amillano K, Malfettone A, Cortes J; PARSIFAL Steering Committee and Trial Investigators. Fulvestrant-Palbociclib vs Letrozole-Palbociclib as Initial Therapy for Endocrine-Sensitive, Hormone Receptor-Positive, ERBB2-Negative Advanced Breast Cancer: A Randomized Clinical Trial. JAMA Oncol. 2021 Dec 1;7(12):1791-1799. doi: 10.1001/jamaoncol.2021.4301.

Drugs

Evaluation	Drug	Modality	Dose	Route
Subject	Fulvestrant	Small molecule	—	—
Comparator	Letrozole	Other / unclassified	—	—
Subject	Palbociclib	Small molecule	—	—

Indications