(A) Stimulation with anti-CD95 (anti-Fas) MoAb (0.1 to 2 μg/mL) for 19 hours resulted in a significant reduction of respiratory burst in unstimulated (▪) and fMLP (10⁻⁷mol/L) activated (•) eosinophils as determined by lucigenin-dependent chemiluminescence. (B) Stimulation with 10 to 100 μmol/L SA (⧫) for 10 minutes significantly blocked fMLP (10⁻⁷mol/L)-induced eosinophil respiratory burst, whereas 500 μmol/L resulted in a significant enhancement (not shown). Data are presented as mean ± SEM intensity counts of 8 different experiments. *P< .05, **P < .01.