At a glance
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A Multicenter Phase II Trial to Evaluate the Efficacy and Safety of Pembrolizumab and Gemcitabine in Patients With HER2-negative Advanced Breast Cancer (ABC) "PANGEA-Breast"
In Brief
A Phase 2 clinical trial evaluating Pembrolizumab and Gemcitabine for Advanced Breast Cancer. Completed, enrolled 36 participants across 9 sites.
Detailed Summary
Study Design and Treatment: This is a multicenter phase II trial, with an initial exploratory run-in-phase, to evaluate the efficacy and safety of pembrolizumab in combination with gemcitabine in patients with HER2-negative ABC that have previously received anthracyclines and taxanes (unless clinically contraindicated). In hormone receptor positive patients, previous treatment with 2 or more lines of hormone therapy will also be required. Patients must have at least one measurable lesion that can be accurately assessed at baseline and is suitable for repeated assessment by CT, MRI or plan X-ray. Approximately 53 patients (up to a maximum of 65 patients depending on the results of the run-in-phase) will be included in this trial.
Study Details
Timeline
Interventions
Pembrolizumab at a dose of 200mg as an intravenous (IV) 30 minutes infusion on day 1 of each 21-day cycle. Treatment will be repeated on day 1 of each 21-day cycle until objective disease progression, clinical progression (under investigator criteria), unacceptable toxicity, death or withdrawal of consent, whichever occurs first. Patients completing 24 months of uninterrupted treatment with pembrolizumab or 35 administrations of study medication will stop pembrolizumab treatment (though may continue with gemcitabine). Subjects who stop pembrolizumab after 24 months may be eligible for up to one year of additional pembrolizumab treatment if they progress after stopping it.
Gemcitabine at a dose of 1,250mg/m2 as an intravenous (IV) 60 minutes infusion on day 1 and 8 of each 21-day cycle. Treatment will be repeated on day 1 of each 21-day cycle until objective disease progression, clinical progression (under investigator criteria), unacceptable toxicity, death or withdrawal of consent, whichever occurs first.