Prolonged survival of CD38-positive B-CLL cells in vitro on exposure to Gaδ-ab.

B-CLL cells were cultured with Gaμ-ab (▪), Gaδ-ab (▴), or NGI (○) at 10 μg/mL for various time intervals. Viability was determined by PI exclusion and flow cytometry analysis. Results are shown as mean ± SD of the experiments carried out on 7 patients with B-CLL (patients B, C, D, E, F, G, L).