Trastuzumab Deruxtecan in First-line HER2-positive Locally Advanced/MBC Patients Resistant to Trastuzumab+Pertuzumab

Sponsor
Spanish Breast Cancer Research Group
Study ID
NCT05744375
Phase
PHASE2
Status
Terminated

Conditions

Eligibility Criteria

Sex
ALL
Age
18 Years - N/A
Healthy Volunteers
Not accepted

Interventions

  • Trastuzumab deruxtecan — DRUG
    All patients enrolled will be treated with trastuzumab deruxtecan (T-DXd) 5.4 mg/kg IV every 3 weeks (± 3 days). The subject's weight at baseline will be used to calculate the initial dose. If during the course of treatment the subject's weight changes by ± 10% of the baseline weight, the subject's dose will be recalculated based on the subject's updated weight. Patients will receive T-DXd until unacceptable toxicity, progressive disease (PD), informed consent withdrawal, or other discontinuation criterion is met.

Study Details

The goal of this national, multicenter single arm phase II clinical trial is to study the efficacy, safety and tolerability of the administration of Trastuzumab Deruxtecan (T-DXd) in HER2-positive locally advanced or metastatic breast cancer (MBC) patients resistant to trastuzumab plus pertuzumab plus taxane due to early relapse. The main questions it aims to answer are: * To evaluate the antitumor activity of T-DXd in the first-line treatment of HER2-positive breast cancer patients resistant to trastuzumab-pertuzumab based therapy. * To assess other efficacy measures. * To evaluate safety and tolerability in all patients enrolled in the study. * To evaluate health-related quality of life (HRQoL). Forty-one evaluable patients will be treated with trastuzumab deruxtecan (T-DXd) 5.4 mg/kg IV every 3 weeks (± 3 days). Patients will receive T-DXd until unacceptable toxicity, progressive disease, informed consent withdrawal, or other discontinuation criterion is met.

Key Dates

Start date
Sep 28, 2023
Status verified
Mar 2026
Primary completion
Jul 17, 2025
Completion
Jul 17, 2025

Study Design

Enrollment
2 participants (actual)
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT

Arms

  • Experimental: Trastuzumab deruxtecan (T-DXd)
    All patients enrolled will be treated with trastuzumab deruxtecan (T-DXd) 5.4 mg/kg IV every 3 weeks (± 3 days). The subject's weight at baseline will be used to calculate the initial dose. If during the course of treatment the subject's weight changes by ± 10% of the baseline weight, the subject's dose will be recalculated based on the subject's updated weight. Patients will receive T-DXd until unacceptable toxicity, progressive disease (PD), informed consent withdrawal, or other discontinuation criterion is met.

Primary Outcome Measure

Objective Response Rate (ORR) [ Time Frame: Through study treatment, and average of 18 months ]

Related coverage on Hipa.ai

Related Studies