ANG and ischemia: At 42 days after ischemia modeling, the highest capillary density in the calf muscle of the ischemic limb was recorded in the Ad5-Vegf group to which gene constructs were administered directly, while the highest capillary density was recorded in the UCBC Ad5-Vegf + Ad5-Ang group on which cell-mediated gene delivery was performed (Figure 4B).