Fig. 3: Induction of lipid droplet formation in porcine fibroblasts in 3D.

A Representative images showing Oil red O staining of porcine fibroblasts following induction with various concentrations of olive oil-based lipogenic inducers in 2D culture. The arrow indicates large lipid droplets. Scale bar, 50 μm. B Experimental design for lipid droplet formation in porcine fibroblasts in 3D. C Representative images showing Oil Red O staining of lipid droplet formation in cells in 3D culture at different focal planes at the same position. Scale bar, 50 μm.