Adipose-derived stromal vascular fraction aids epithelialisation and angiogenesis in an animal model.
OBJECTIVE
Limited data exist regarding the correlation between adipose-derived stromal vascular fraction (SVF) and wound healing. The aim of this study was to investigate the direct effect of intradermally injected SVF on full-thickness cutaneous wounds in a murine model.


METHOD
Wistar rats were divided into three groups (A, B and C) according to their day of euthanasia (day 7, 16 and 21). Inguinal fat pad was excised and SVF enzymatically extracted. Full-thickness cutaneous wounds were created on each side of the dorsum; SVF injected intradermally at one side while the contralateral wound served as control receiving normal saline. Postoperatively, evaluation of wound healing was performed by planimetry (percentages of wound contraction, epithelialisation and total wound healing) on days 0, 3, 5, 7, 10, 13, 16 and 21, and histology and immunochemistry (cellular infiltration score, collagen production score, neoangiogenesis and epithelial thickness) on days 7, 16 and 21.


RESULTS
Despite the high rate of wound contraction, it was significantly lower in the SVF-treated wounds on day 21 (p=0.037). On days 13, 16 and 21, the percentages of epithelialisation were higher in the SVF-treated wounds compared with control wounds (p=0.026, p=0.048 and p=0.05, respectively). Histologically, the number of new vessels was significantly higher in the SVF-treated wounds compared with controls on days seven (p=0.028) and 16 (p=0.027). This was also confirmed by immunohistochemistry. No significant differences were found between treated and control wounds regarding cellular infiltration score, collagen production score and epithelial thickness.


CONCLUSION
Data indicate that intradermally injected SVF increases angiogenesis and enhances epithelialisation in full-thickness cutaneous wounds in rats.
['Karagergou|Eleni|E|', 'Dionyssopoulos|Alexandros|A|', 'Karayannopoulou|Maria|M|', 'Psalla|Dimitra|D|', 'Theodoridis|Alexandros|A|', 'Demiri|Efterpi|E|', 'Koliakos|Georgios|G|']
D000273:Adipose Tissue D000818:Animals D004195:Disease Models, Animal D007271:Injections, Intradermal D008297:Male D051381:Rats D017208:Rats, Wistar D062326:Re-Epithelialization D017154:Stromal Cells D000072836:Surgical Wound D014945:Wound Healing
adipose-derived stromal vascular fraction full-thickness cutaneous wounds second intention wound healing