A bispecific antibody-drug conjugate targeting EGFR and HER3 in metastatic esophageal squamous cell carcinoma: a phase 1b trial.

ABSTRACT: Research on patients with advanced esophageal squamous cell carcinoma (ESCC) who have progressed on immunotherapy remains limited. BL-B01D1 is a first-in-class antibody-drug conjugate consisting of an EGFR-HER3 bispecific antibody bound to a topoisomerase I inhibitor (Ed-04) payload via a cleavable linker. Here, we present safety and efficacy data from a phase 1 study of BL-B01D1, in 82 patients previously treated for ESCC. The primary endpoint was the recommended phase 2 dose. Administered doses were 2.0 (n = 22) and 2.5 (n = 60) mg kg^-1 D1D8 infusion every 3 weeks (Q3W). The confirmed objective response rate (cORR) was 29.3% (24 of 82) in all patients and 32.9% (24 of 73) among evaluable patients. For patients dosed at 2.5 mg kg^-1, cORR was 39.6% (21 of 53) and dise

SUBMITTER: Liu C 

PROVIDER: S-EPMC12532689 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature