The Role of Recombinant Fibroblast Growth Factor 1 in Enhancing the Angiogenesis in Random Cutaneous Flaps in Animal Model of Rat.

Background: Randomized skin flaps have been used as a basic treatment modality for covering skin defects for a long time but they have always been in the risk of an inherent ischemia. Fibroblast growth factor 1 is a known angiogenic factor in in vitro studies which has shown conflicting results in in vivo investigation. We aimed to determine the effect of recombinant fibroblast growth factor on the angiogenesis rate of random cutaneous flap in animal model of rats.

Methods: This experimental study was conducted on 24 adult male rats randomized to 2 groups. In the first group FGF1 was injected subdermally in equally divided doses and distances of random flap surface in days 1, 3 and 5. In second group, normal saline was injected as control. Flap surgery was done on day 21 after first injection. The extent of necrosis and angiogenesis (mean vessel density) were assessed in day 14 after surgery.

Results: The mean percentage of clinically apparent necrosis was 35.2% (±10.5) in intervention (FGF1) group and 38.1% (±8.7) in control (normal saline), respectively. Mean vessel density was 86.20±5.6/mm2 in control group and 90.17±5.5/mm2 in intervention group, which showed no statistically significant difference.

Conclusion: Mean vessel density and mean percentage of clinically apparent necrosis area were similar in 2 groups of rats with random cutaneous flaps receiving FGF1 or normal saline.