Figure 2.

Effects of Psoralen on the proliferation of NSC. Single NSCs were plated at a density of 5000 cells per well in PDL-coated 96-well plate for 12 h. Then, cells were subjected to 10 nM EdU for 2 h, followed by addition of 100 nM OA (b) or not (a). Then Edu immunofluorescence analysis was performed. The cell nuclei were counterstained with DAPI. The percentage of EdU-positive cells in total of 1000 cells was calculated. As a result, Psoralen significantly inhibited the DNA incorporation (c). Scale bars: 100 μm. Results were expressed as mean ± S.D. from four independent experiments. *P < 0.05 versus control.