Figure 5.

Different approaches for the development of chitosan-based bioinks. (A) Example of the modification of chitosan (and gelatin) with 5-methyl furfural and crosslinking with Star-PEG-MA for the development of a bioink for 3D bioprinting with U87 cells (Reproduced with permission from [194]. Copyright Frontiers, 2020); (B) dual-crosslinked hydrogel bioink using chitosan methacrylate together with β-glycerol phosphate with NIH 3T3 cells (Reproduced with permission from [197]. Copyright Elsevier, 2020); and (C) bioink based on chitosan, together with β-glycerol phosphate and hydroxyethyl cellulose, reinforced with cellulose nanocrystals, with good printability and high cell viability(Reproduced with permission from [105]. Copyright American Chemical Society, 2021).