Day One Biopharmaceuticals, Inc.
This is a Phase 1a/1b, open-label, dose escalation and expansion study to evaluate the safety and anti-tumor activity of DAY301, a PTK7-directed antibody-drug conjugate (ADC) in participants with advanced or metastatic solid tumors. The study comprises of 2 phases: Phase 1a dose escalation where participants will be administered DAY301 at escalating dose levels to assess safety and tolerability, and to determine the maximum tolerated dose (MTD) and/or the recommended dose (RD); In Phase 1b dose expansion, DAY301 will be evaluated in dose expansion cohorts.
Inclusion Criteria: * Histologically or cytologically confirmed diagnosis of advanced or metastatic solid tumors of the following histologies: * Ovarian cancer * Esophageal squamous cell carcinoma * Triple-negative breast cancer * Non-small cell lung cancer * Small cell lung cancer * Head and neck squamous cell carcinoma * Cervical squamous cell carcinoma * Endometrial cancers (Participants must have been previously treated with standard of care systemic therapy, have refused standard therapy, or have no standard therapy available). * Availability of tumor tissue sample (either an archival…
DAY301 will be administered as IV infusion