Comparison of the effect of IL-3 (100 U/mL, □), anti-Fas MoAb (FAS, 1 μg/mL, ▪), SA (50 μmol/L, ▴), and medium control (Med, ○) on eosinophil apoptosis. Data are presented as mean ± SEM of 8 separate experiments. Whereas IL-3 significantly inhibited eosinophil apoptosis, FAS and SA significantly enhanced it. After 19 hours of incubation, SA resulted in a significantly higher enhancement of apoptosis compared with Fas. **P < .01, ***P< .001 versus Med.