Fig. 9From: GelMA/PEGDA microneedles patch loaded with HUVECs-derived exosomes and Tazarotene promote diabetic wound healingImmunofluorescent staining of wound sections given the above treatments at day 15 post-wounding. a Endothelial cells (CD31), smooth muscle cells (a-SMA), and cell nuclei (DAPI) were stained with red, green, and blue colors. b, c Qualification of the stain intensity of CD31 and a-SMA shown in a. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001Back to article page