Study Comparing Izalontamab Brengitecan to Chemotherapy for First-Line Treatment of Advanced or Metastatic Triple-Negative or ER-Low, HER2-Negative Breast Cancer in Patients Not Eligible for Anti-PDL1 Therapy

What this Trial Is About

Researchers are evaluating the efficacy and safety of iza-bren, a bi-specific antibody-drug conjugate targeting EGFR and HER3 with a chemotherapy payload, compared to treatment chosen by physicians including paclitaxel, nab-paclitaxel, carboplatin plus gemcitabine, and capecitabine for patients with first-line metastatic triple-negative breast cancer TNBC or low estrogen receptor ER-low, HER2-negative breast cancer who cannot receive anti-PDL1 or endocrine therapies. This study includes adults with locally advanced, recurrent inoperable, or metastatic disease who meet specific eligibility criteria. Participants are randomly assigned to receive iza-bren or one of the physicians choice chemotherapy regimens. The treatments are given at specified doses on scheduled days. The study includes two phases Phase 2 to determine the recommended dose of iza-bren and Phase 3 to compare progression-free survival and other outcomes. The study will last several years, with follow-up extending up to approximately 47 months after randomization. During the study, participants will undergo regular assessments including imaging scans to measure tumor response, laboratory tests, and monitoring for adverse events. Quality of life questionnaires will also be completed. Researchers will track progression-free survival, overall survival, treatment-related side effects, tumor size changes, and patient-reported outcomes to evaluate the treatments. The total participation duration may extend up to several years depending on treatment response and follow-up requirements.

A Study of Izalontamab Brengitecan Versus Chemotherapy in Participants With Previously Untreated, Locally Advanced, Recurrent Inoperable, or Metastatic Triple-negative Breast Cancer Ineligible for Anti-PD(L)1 Drugs (IZABRIGHT-Breast01)