NCT02738866

Palbociclib With Fulvestrant for Metastatic Breast Cancer After Treatment With Palbociclib and an Aromatase Inhibitor

Phase II Trial of Palbociclib With Fulvestrant in Individuals With Hormone Receptor-Positive, HER2-Negative Metastatic Breast Cancer Who Have Progressed on Treatment With Palbociclib and an Aromatase Inhibitor

• Status: Active Not Recruiting
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 60 (actual)
• Sponsor: Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This study is being done to look at the role of continuing palbociclib treatment in combination with another type of hormonal therapy (fulvestrant) after disease progression of palbociclib in combination with an aromatase inhibitor.

Detailed description

In this phase II trial, the primary objective is to determine the progression-free survival (PFS) of the cyclin dependent kinase 4/6 inhibitor (CDK4/6i) palbociclib with fulvestrant in women and men with estrogen or progesterone receptor (ER/PR) positive, HER2-negative metastatic breast cancer (MBC) who progressed on treatment with palbociclib and an aromatase inhibitor (AI). The study will also determine the prevalence rate of estrogen receptor α (ESR1) and phosphatidylinositol-3-kinase (PI3K) mutations in the study population. The secondary objectives include evaluating the progression-free survival (PFS) in participants with and without ESR1 mutations, and PI3K mutations through analysis of tumor biopsies and circulating plasma tumor DNA (ptDNA) samples. The study will also describe other alterations in genes and gene products relevant to the cell cycle, drug targets, tumor sensitivity and resistance, and identify novel protein kinases activated in biopsies from participants with hormone refractory MBC who progressed on prior palbociclib and AI. The data will be correlated with tumor subtypes, expression profiles, and candidate phosphoprotein expression with PFS in the study population.

Conditions

• Metastatic Breast Cancer

Interventions

Type	Name	Description
DRUG	Palbociclib	Palbociclib will be given orally, continued at the same dose as was received previously; the maximum starting dose will be per the approved label, a dose of 125 mg once daily. Palbociclib will be taken days 1-21, then seven days off treatment to complete one 28 day cycle.
DRUG	Fulvestrant	Fulvestrant 500 mg should be administered intramuscularly into the buttocks slowly (1-2 minutes per injection) as two 5 mL injections, one in each buttock, on days 1, 15, and 29 (i.e., Cycle 2 Day 1) and once monthly thereafter (i.e., day 1 of each cycle).

Timeline

• Start date: 2016-10-25
• Primary completion: 2026-06-01
• Completion: 2026-06-01
• First posted: 2016-04-14
• Last updated: 2025-12-10

Locations

5 sites across 1 country: United States