Fig. 2

Pericellular collagen I coating. a, b MSCs coated with PCC observed by laser confocal microscopy (a scale bar, 10 μm) and fluorescence microscope (b scale bar, 500 μm). PCC stained by FITC-labeled anti-col. I antibody green, nucleus stained by DAPI blue. c Coating ratio calculated by fluorescence microscopy (n = 5). d SEM image of single MSC under 10,000× magnification. e SEM image of single MSC coated by col. I under 10,000× magnification. f Force–distance curve of MSCs and MSCs-PCC groups. g Young’s modulus of MSCs and MSCs-PCC groups. MSC mesenchymal stem cell, PCC pericellular collagen I coating. *p < 0.05