High cell viability on the 3D-printed HGGelMA and GelMA hydrogel
scaffolds. (A) mBMSCs densities of after cultured on the HGGelMA and GelMA
scaffolds for different days. (B) Live/dead stained images of the encapsulated
mBMSCs on the GelMA and HGGelMA printed fibers after cultured for 12 days. (C-E)
Fluorescence images showing the morphology of mBMSCs after 24 h of culture on
GelMA, HGGelMA and PEGDA hydrogels, respectively. F-actin, Vinculin and DAPI
were stained green, red and blue, respectively.