Fig. 5: Bioactivity of self-assembled hierarchical silk fibroin (SF) fibers.
From: Bioactive hierarchical silk fibers created by bioinspired self-assembly
a Growth of human umbilical vein endothelial cells (HUVECs) on the self-assembled (at 3000 rpm for 5 min) and natural SF fibers, respectively (cell nuclei and fibers were stained in blue where the nuclei with bright-blue dots are indicated by the white dotted ovals. F-actin was stained in red. The white arrow indicates the interaction between cells on different fibers. The yellow arrows indicate the different cell-fiber interactions on the self-assembled and natural SF fibers, respectively.). Scale bars: 10 μm. b Viability (the cell viability is proportional to the absorbance level) of HUVECs on the self-assembled (at 3000 rpm for 5 min) and natural SF fibers, respectively, at fixed culture time points. Error bars represent standard deviation (n = 4). (**p < 0.01).
