Cytotoxicity of γδ T cells against neuroblastoma cells.

γδ T lymphocytes were cultured for a period of 30 days with IL-2 or with IL-2 and clodronate. Columns represent the percentage of specific lysis in a cytotoxicity-determining assay (BATDA release)4compared with control (maximum release) at different time points. Results are shown for E/T ratio 20:1.