Fig. 2

Cell viability of the 3D-printed scaffolds on BMSCs and macrophages. A, C Schematic illustration of the co-culture models- "co-culture on" hydrogels. B, D The Calcein-AM/PI staining of BMSCs and macrophages co-cultured on SG, SGC_L, SGC_M and SGC_H scaffolds. E, G Schematic illustration of the co-culture models- "co-culture with" hydrogels. F, H The Calcein-AM/PI staining of BMSCs and macrophages co-cultured with SG, SGC_L, SGC_M and SGC_H scaffolds. I CCK-8 assay of BMSCs after cultured for 1, 4, and 7 days. J CCK-8 assay of macrophages after cultured for 1 and 3 days. ^*P < 0.05, ^**P < 0.01 or.^***P < 0.001