Fig. 3From: Regulation of intracellular transition metal ion level with a pH-sensitive inorganic nanocluster to improve therapeutic angiogenesis by enriching conditioned medium retrieved from human adipose derived stem cellsOptimizing the concentration of ps-TNCs for hADSC treatment. a Cell viability of hADSCs treated with various concentration of ps-TNCs (n = 4, *p < 0.05 compared to the untreated group). b Concentration-dependent pro-apoptotic mRNA (p53) expression in hADSCs. c DiI staining of hADSCs treated with ps-TNCs (red, cellular membrane). d TUNEL assay of ps-TNCs treated hADSCs (blue: nucleus, green: apoptotic cell)Back to article page