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. 2022 Jan 8;20:28. doi: 10.1186/s12951-021-01208-5

Fig. 7.

Fig. 7

Effect of the 3D hydrogel/nanofiber composite scaffolds on collagen deposition in the wound beds. Masson trichrome staining images of wound tissues treated at A 7 days and B 11 days (green arrows indicate the edges of the wounds; blue areas indicate the collagen fibers). PCR gene quantitative analysis of C Collagen I, D Collagen III, E TGF-β expressed in different groups on 11 days. Values are expressed as mean ± standard deviation (SD) (n = 3) (*P < 0.05, **P < 0.01, ***P < 0.001)