Fig. 6.

Characterization of GelMA and coculture of hASCs in GelMA. a The diameter distribution of GelMA. b, c The SEM image exhibited the three-dimensional structure of GelMA and the morphology of hASCs on the surface of GelMA. d Confocal microscopy was used to observe the morphology of hASCs encapsulated in the GelMA (scale bar = 100 μm). e Images of Calcein-AM/PI staining, where calcein-AM indicated live cells with green fluorescence and PI indicated dead cells with red fluorescence (scale bar = 200 μm). f Proliferation ability of hASCs encapsulated in GelMA scaffold was measured using CCK-8. g Images of ALP and ARS stainings after transfection