Fig. 4.

General situation of endothelialization in different grafts. The general morphology of the inner layer surface of different grafts was observed by SEM at 1 mm (A, B and C), 50 μm (D, E and F), and 10 μm (G, H and I). Red arrows indicated vascular ECs. Immunofluorescence images of PCL grafts (J and M), PCL/fibrin grafts (K and N) and native artery (L and O) stained with vWF (red) and DAPI (blue), respectively. Scale bar: 100 μm. Endothelial coverage of different grafts was calculated (P) (n = 3). _⁎ p<0.05. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)