Release of sTRAIL by IFNα-stimulated neutrophils and PBMCs of healthy donors and CML patients. Neutrophils and PBMCs isolated from healthy donors or CML patients were incubated for 24 hours in the absence or in the presence of 100 U/mL IFNα. The yields of sTRAIL (A) and sFasL (B) were determined in the corresponding cell-free supernatants by ELISA. The mean values ± SEM of cytokine release from 3 to 4 independent experiments are shown.