Fig. 1.
Drug-induced apoptosis is accompanied by conformational changes in Bax.
(A) Cells from a representative CLL patient were incubated in the presence or absence of 5 μg/mL fludarabine, 10 μM dexamethasone, or the FCM combination for 24 hours. Bax conformational changes were determined by staining with anti-Bax (clone YHT-6A7) and flow cytometric analysis. Cell viability was quantified by annexin V binding. In FCM-treated cells, a shift in the signal of fluorescence 2 (585 nm) and 3 (630 nm) was observed owing to the incorporation of mitoxantrone. The percentage of positive cells is indicated in each panel. (B) Correlation between cell viability and Bax-positive cells following incubation with medium alone, fludarabine, dexamethasone, or the FCM combination in cells from 33 CLL patients.