PLZF-RARα promotes cell proliferation but does not induce apoptosis.
A, FACS analysis of HEK293 and HCT116 cells transfected with either a pcDNA3 or pSG5-PLZF-RARα plasmid. B, MTT assay of cell proliferation. HEK293 and HCT116 cells transfected with either a pcDNA3 or pSG5-PLZF-RARα plasmid were grown for 1–4 days and analyzed for MTT to formazan conversion using colorimetry at 540–600 nm. *, p < 0.05. Mean values of three independent experiments are shown. Error bars are too small to see and represent S.D. C, FACS analysis of apoptosis. HEK293 cells were transfected with either a pcDNA3 or pSG5-PLZF-RARα plasmid. The cells were stained with Annexin V and propidium iodide 48 h after transfection. x axis, Annexin V-FITC staining; y axis, propidium iodide (PI) staining. The numbers shown in the two right quadrants represent the percentage of cells undergoing apoptosis.