Sensitivity of CML cell lines to the antiproliferative effect of IFN-α.

Cells were incubated with 1000 U IFN-α for 72 hours and proliferation was assessed using MTT as indicated in “Materials and methods.” Each point represents the mean ± SEM of 2 independent experiments, each conducted in triplicate. Statistical analysis (paired t test): A3 versus A3R, B7, OUN-1, and K562;P < .01.