Fig. 1

Preparation and characterization of hydrogel. A Schematic diagram of preparation of hydrogel and 3D culture and differentiation of stem cells; B Scanning electron microscopy imaging of hydrogel. Bar: 20 μm; C The appearance of the SHED on the hydrogel with FBS or HPL. Bar: 100 μm. SHED group: SHED cultured on hydrogel supplemented with FBS. SHED + HPL group: SHED cultured on hydrogel supplemented with HPL