Properties and Printability of the Synthesized Hydrogel Based on GelMA

Gelatin methacryloyl (GelMA) has recently attracted increasing attention. Unlike other hydrogels, it allows for the adjustment of the mechanical properties using such factors as degree of functionalization, concentration, and photocrosslinking parameters. In this study, GelMA with a high degree of substitution (82.75 +/- 7.09%) was synthesized, and its suitability for extrusion printing, cytocompatibility, and biocompatibility was studied. Satisfactory printing quality was demonstrated with the 15% concentration hydrogel. The high degree of functionalization led to a decrease in the ability of human adipose-derived stem cells (ADSCs) to adhere to the GelMA surface. During the first 3 days after sowing, proliferation was observed. Degradation in animals after subcutaneous implantation was slowed down.

Automated summary

Gelatin methacryloyl (GelMA) has attracted attention due to its tunable mechanical properties. This study synthesized highly substituted GelMA and investigated its suitability for 3D printing, cytocompatibility, and biocompatibility. The results showed that a 15% concentration GelMA achieved satisfactory printing quality, but the high degree of substitution decreased the adhesion ability of human adipose-derived stem cells (ADSCs) to the GelMA surface. In animal implantation, GelMA degradation was slowed down.