T-cell engagers (TCEs) are a new class of immuno-oncology therapies that have proven effective for the treatment of both solid tumors and hematological malignancies. Among validated targets in this field, claudin 18.2 (CLDN18.2) is one of the most clinically established. Researchers from Astrazeneca plc and collaborators reported the preclinical evaluation of AZD-5863, a bispecific fully human monoclonal antibody targeting claudin CLDN18.2 and CD3.