The Bispecific T-cell Engager (
BiTE) antibody modality is a clinically validated immunotherapeutic approach for targeting
tumors. Using T-cell dependent cellular cytotoxicity (TDCC) assays, we measure the percentage of specific cytotoxicity induced when a
BiTE molecule engages T-cells, redirects T-cell mediated cytolysis, and ultimately kills target cells. We establish a novel luminescence-based TDCC assay quantified by measuring cell viability via constitutive expression of
luciferase. The
luciferase-based TDCC assay performance is valid and comparable to an
adenosine triphosphate (
ATP)-based detection method. We demonstrate that the
luciferase-based TDCC assay is an efficient homogeneous assay format that is amenable to both
suspension and adherent target cells. The
luciferase-based TDCC assay eliminates the need for plate-washing protocols, allowing for higher-throughput screening of
BiTE antibodies and better data quality. Assay capacity is also improved by performing serial dilutions of
BiTE antibodies in 384-well format with an automated liquid handler. We describe here a robust, homogeneous TDCC assay platform with capacity for in vitro assessment of
BiTE antibody potency and efficacy using multiple tumor cell lines and T-cell donors.