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The effects of ADSC-CM on UVB-induced apoptosis of normal human dermal fibroblasts (NHDF) cells, as determined by Hoechst 33258 staining. Magnification scale: 400×. Apoptotic rate was calculated as the percentage of apoptotic cells over the total cell numbers in five randomly selected areas. Values are shown as mean ± SD. # p < 0.05, compared with the non-irradiated control. * p < 0.05, compared with the irradiated, ADSC-CM free control.
