Fig. 5

Cell proliferation analysis in hBMSCs. A-C Cell proliferation analysis. Cell viability was evaluated by MTT assay at 3 days and 5 days. B-D Live and dead assay of hBMSCs co-cultured with different scaffolds for 3 day and 5 days. The cells were stained with fluorescein diacetate (FDA, green) and propidium iodide (PI, red) and were examined by a confocal microscopy. Green indicated living cells and dead cells were labeled as red fluorescence. Group a = control, group b = PLA scaffold, group c = PLA-Exo scaffold