Comparative cytotoxicity of BAY 36-1677 and native IL-4.

Bars represent the inhibition of recovery of leukemic lymphoblast after 7 days of culture on stroma with BAY 36-1677 (▩) or native IL-4 (■) (both at 25 ng/mL). The results of duplicate cultures with either cytokine were compared to control cultures without cytokines.