Fig. 3.

CD44 expression by flow cytometry. a Representative images of CD44 expressions by flow cytometry in PC-3 and DU145 cell lines with the same treatments as described above. Mouse nonimmune IgG2b labeled with APC was used as isotype control corresponding to the antibody of CD44 conjugated with APC. b Histograms (left panels) and the corresponding tables (right panels) show increasing CD44 expression by stimulation with SCF, G-CSF, or both cytokines in both cell lines. (Asterisk means P < 0.05 vs. blank control; double asterisks means P < 0.01 vs. blank control)