Fabrication of cell-laden constructs from GelMA-CBP bioinks. The suitability of GelMA-CBP bioinks containing 3T3 fibroblasts for 3D cell culture applications was evaluated by crosslinking the inks and encapsulating the cells within puck-like constructs (Figure ). The bioinks were formulated by creating a pre-ink that, upon mixing with a suspension of cells in cell culture media, resulted in 1 or 5% GelMA, 0.5% CBP, 0.5% LAP, and a final cell density of 0.5 x 10 6 (for 1 and 5% GelMA) or 5 x 10 6 cells/mL (for 5% GelMA only). After mixing the pre-ink and the cell suspension at a 4:1 (w/v) ratio, the bioinks obtained were gel-like and the cells were well dispersed within them. The bioinks were cast within puck molds and crosslinked using 405 nm light at 15% intensity. Cell viability in the center planes of the crosslinked hydrogels, as assessed using a fluorescent Live/Dead assay and confocal microscopy, was > 90% over 14 days for all the bioink formulations, showing that the introduction of CBP in the GelMA crosslinked network does not have a negative impact on cell survival (Figure ).