Figure 1.

(A). The process of generating PEG-infiltrated GH (GH+PEG) scaffold. Specifically, uncured gelatin and hyaluronic acid (GH)/LAP (photoinitiator) solution were added into a mold with a cylindrical void space, then subjected to visible light illumination. Next, the pre-formed GH scaffold was soaked into Poly (ethylene glycol)-diacrylate (PEG)/LAP solution for 5 min. After PEG infiltration, the scaffold was photocrosslinked again to form the hybrid scaffold (GH+PEG). (B). Compressive modulus of GH and GH+PEG scaffolds. (n = 4 scaffolds). ** p < 0.01. (C). The appearance of different hydrogel scaffolds before (top panel) and after (bottom panel) the treatment with papain.