Fig. 3From: 3D co-culture model of endothelial colony-forming cells (ECFCs) reverses late passage adipose-derived stem cell senescence for wound healingASC/ECFC co-culture in 2D and 3D. a ASC morphology in monolayer culture after co-culture with ECFCs. Scale bar = 10 μm. b Optimization of 3D co-culture model. Scale bar = 50 μm. c ELISA quantification of secreted growth factors. *p < 0.05, **p < 0.01Back to article page