The effect of adipose derived stromal vascular fraction on stasis zone in an experimental burn model

• Published in: Burns Vol. 44; no. 2; pp. 386 - 396
• Main Authors: Eyuboglu, Atilla Adnan, Uysal, Cagri A., Ozgun, Gonca, Coskun, Erhan, Markal Ertas, Nilgun, Haberal, Mehmet
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Ltd 01.03.2018
• Subjects: Adipose derived stem cell; Adipose Tissue - cytology; Angiography; Animals; Burn; Burns - pathology; Cell Differentiation; Disease Models, Animal; Endothelial Cells - cytology; Fibrosis; Inflammation; Mesenchymal Stem Cells; Neovascularization, Physiologic; Rats; Rats, Sprague-Dawley; Re-Epithelialization; Skin - blood supply; Skin - pathology; Stasis zone; Stem cell; Stem Cell Transplantation; Stromal vascular fraction; Burn; Adipose derived stem cell; Stromal vascular fraction; Stasis zone; Stem cell
• ISSN: 0305-4179; 1879-1409
• DOI: 10.1016/j.burns.2017.08.016

•The ADSVF were indicated to be effective in the survival of zone of statis.•The differentiation of DiI-labeled ADSVF cells to endothelial cells were noted.•The increased vascular density in the ADSVF cell group proved the neovascularization.•Fibrosis gradient and inflammatory cell density were lower on ADSVF side proved regulatory effects of stem cells.•Epithelization was better in the ADSVF side. Stasis zone is the surrounding area of the coagulation zone which is an important part determining the extent of the necrosis in burn patients. In our study we aim to salvage the stasis zone by injecting adipose derived stromal vascular fraction (ADSVF). Thermal injury was applied on dorsum of Sprague–Dawley rats (n=20) by the “comb burn” model as described previously. When the burn injury was established on Sprague–Dawley rats (30min); rat dorsum was separated into 2 equal parts consisting of 4 burn zones (3 stasis zone) on each pair. ADSVF cells harvested from inguinal fat pads of Sprague–Dawley rats (n=5) were injected on the right side while same amount of phosphate buffered saline (PBS) injected on the left side of the same animal. One week later, average vital tissue on the statis zone was determined by macroscopy, angiography and microscopy. Vascular density, inflammatory cell density, gradient of fibrosis and epithelial thickness were determined via immunohistochemical assay. Macroscopic stasis zone tissue viability (32±3.28%, 57±4.28%) (p<0.01), average number of vessels (10.28±1.28, 19.43±1.72) (p<0.01), capillary count (15.67±1.97, 25.35±2.15) (p<0.01) vascular density (1.55±0.38, 2.14±0.45) (p<0.01) epithelial thickness (0.014±0.009mm, 0.024±0.0011mm) were higher on ADSVF side. Fibrosis gradient (1.87±0.51, 1.50±0.43) (p<0.01) and inflammatory cell density (1.33±0.40, 1.20±0.32) (p<0.01) were higher on the PBS side. Macroscopic and microscopic findings determined that ADSVF has a statistically significant benefit for salvaging stasis zone on acute burn injuries.