Restoration of WNT7A in K562-, BJAB-, and CEM-Tet-WNT7A cells inhibits their cell proliferation. Graphs of the left column depict the percentage of cell proliferation measured in K562-, BJAB-, and CEM-Tet-WNT7A cells after 24-h and 48-h incubation with Doxycycline (Doxy). The empty-vector cell lines (K562-, BJAB-, and CEM-Tet) were also included as controls. The percentage of cell proliferation was measured by adding WST-1 to the cell cultures for 2 h and by reading the absorbance of treated and untreated cells at 440 nm. The value in each cell line of non-treated cells after 24 or 48 h was setting as 100% of cell proliferation. Right column graphs illustrate the histograms of the flow-cytometric analysis done for apoptosis detection utilizing Annexin-V-FLUOS as markers in non-treated (filled curve) and 48-h Doxy-treated cells (open curve). Ordinate: number of cells; Abscissa: fluorescence intensities.