Phase II Trial of Ivonescimab in Combination With Carboplatin + Docetaxel in Patients With Early Stage Triple Negative Breast Cancer

Summary

This is a single arm phase II trial combination of ivonescimab and carbo-docetaxel every 3 weeks for 6 cycles in patients with early-stage triple negative breast cancer. The trial is designed to test the safety and efficacy of adding ivonescimab in patients with early TNBC undergoing neoadjuvant chemotherapy with carboplatin and docetaxel. Patients will receive ivonescimab 20 mg/kg IV on Day 1 of each cycle, and carboplatin AUC6 and docetaxel 75 mg/m2 on Day 1 of each cycle for 6 cycles. Cycles will be 21 days for a total of 6 cycles. Curative intent surgery will be performed within 6 weeks (maximum 12 weeks) time frame upon completion of last dose of chemoimmunotherapy. The surgical pathology information will be used for assessment of pathological response, which serve as the primary endpoint of this study. Patients will undergo assessment at baseline, C1D1 of each cycle and end of treatment visit for collection of treatment-emergent adverse events, evaluated by CTCAE v5.0. Patient reported outcomes will be collected at cycles 1, 4, and 6, and at EOT. All study patients will be followed for at least 5 years for EFS and OS follow up. Research biopsies, peripheral blood and stool samples will be collected at the following time points: baseline, C4D1 (+/-14 days), and surgery (+/-14 days). Baseline and EOT breast MRI will be performed as standard of care for assessment of clinical response. Mid treatment breast ultrasound (C4D1 +/-14 days) will be repeated as standard of care to assess clinical response to treatment. Mid-treatment C4D1 tumor biopsy may be omitted if the primary tumor is no longer visible or the tumor deemed too small for biopsy by radiologist.