Fig. 11.

The grades of angiogenesis by the values of the vascular endothelial growth factor (VEGF) expression. The expression was the highest in the O. mykiss-derived polydeoxyribonucleotide (PDRN) injection group, followed by that in the O. keta-derived PDRN injection group, O. ketaderived PDRN cream group, then the normal saline soaked dressing group. There were significant differences among the experimental groups on days 4 and 7. All values are presented as mean±standard deviation from four different independent experimental sets. Significant differences are indicated by *p<0.05. O, Oncorhynchus.