Fig. 4.
Surface functionalization through polypeptide and growth factors grafting. a Schematic representation of the fabrication process of nanocoating modified 3D printed scaffolds and the sequential release of growth factors in the nanocoating film. b Protein release profiles of nanocoating within 2 weeks. c Fluorescent images of hMSCs and HUVECs on the 3D printed scaffolds. The hMSCs exhibited a well-distributed spread on scaffold surface, while the HUVECs formed an aggregative microvascular networks. a–c are reproduced with permission [164].
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