Fig. 5From: GelMA/PEGDA microneedles patch loaded with HUVECs-derived exosomes and Tazarotene promote diabetic wound healingBiocompatibility of GelMA/PEGDA Hydrogel. a Survival ratio of fibroblasts, HUVECs, HaCAT cells treated with liquid extracts of GelMA/PEGDA hydrogel. Scar bar, 100 μm. b Cell viability was determined by CCK8 assay. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001Back to article page