The effect of stromal vascular fraction in an experimental frostbite injury model |
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| Affiliation: | 1. Department of Plastic, Reconstructive and Aesthetic Surgery, University of Health Sciences, Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Turkey;2. Department of Plastic, Reconstructive and Aesthetic Surgery, Sirnak State Hospital, Sirnak, Turkey;3. Department of Clinical Pathology, University of Health Sciences, Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Turkey;4. Department of Anesthesiology and Reanimation, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey;1. Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA;2. Division of Emergency Medicine, Department of Surgery, Stanford University School of Medicine, Stanford, CA;3. Department of Pathology and Dermatology, Stanford University School of Medicine, Stanford, CA;4. Division of Immunology and Rheumatology, Department of Medicine, Stanford University School of Medicine, Stanford, CA;1. Department of Plastic, Reconstructive, Hand and Burn Surgery, BG-Trauma Center, Eberhard Karls University, Tuebingen, Germany;2. Department of Plastic, Hand, Reconstructive and Aesthetic Surgery, HELIOS Klinikum Wuppertal, University Witten/Herdecke, Germany;1. Department of Echocardiography, Affiliated Traditional Chinese Medicine Hospital, Xinjiang Medical University, Urumqi, China (Drs Hu and Li);2. Department of Medical Engineering, Urumchi General Hospital of Lanzhou Military Region, Urumchi, China (Drs Geng, Jiao, Lou, and Jiao);3. Department of Ultrasound, Xijing Hospital, The Fourth Military Medical University, Xi’an, China (Dr Song);1. Burn and Regenerative Medicine Research Center, Guilan University of Medical Sciences, Rasht, Iran;2. Microbiology, Virology and Microbial Toxins Department, School of Medicine, Guilan University of Medical Sciences (GUMS), Rasht, Iran;3. Universal Scientific Education and Research Network (USERN), Microbial Toxins Physiology Group, Rasht, Iran;4. Department of Medical-Surgical Nursing, School of Nursing and Midwifery, Kashan University of Medical Sciences, Kashan, Iran;5. Department of Medical Physics, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran;6. Health Information Management Research Center, Kashan University of Medical Sciences, Kashan, Iran;7. Department of Medical-Surgical Nursing, School of Nursing and Midwifery, Guilan University of Medical Sciences, Rasht, Iran;1. Department of Burns and Plastic Surgery, City Hospital Campus, Nottingham University Hospitals NHS Trust, Hucknall Road, Nottingham NG5 1PB, United Kingdom;2. The University of Nottingham Medical School, Nottingham NG7 2UH, United Kingdom;3. Postgraduate Medical Education Centre, City Hospital Campus, Nottingham University, Hospitals NHS Trust, Nottingham NG5 1PB, United Kingdom |
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| Abstract: | BackgroundDespite current treatment modalities, frostbite remains an injury with a poor prognosis which may cause functional morbidities. Several experimental and clinical studies have demonstrated that stromal vascular fraction is an autologous mixture, which can improve wound healing and vasculogenesis. The aim of this study was to show the beneficial effects of stromal vascular fraction on experimental frostbite healing.Material and methodsStromal vascular fraction (SVF) was harvested from 5 rats after excision of the inguinal fat pads. Another 20 rats were separated into 2 groups of 10 as the SVF group and the control group. A frostbite injury was created on each rat using a cryoprobe frozen with liquid nitrogen (?196 °C). SVF was applied to the SVF group and phosphate-buffered saline to the control group. All injections were performed subcutaneously within the frostbite injury area. Biopsies were performed on days 5 and 14 for histopathological and immunochemical evaluations. The tissue perfusion rates of both groups were assessed on day 14 using indocyanine green angiography (SPY system).ResultsThe increase in mean tissue perfusion was 373.3% ( ± 32.1) in the SVF group and 123.8% ( ± 16.3) in the control group (p < 0.001). The macroscopic wound reduction rates of the SVF and control groups were 25.5% ( ± 19.1) and 18.0% ( ± 5.9), respectively on day 5%, and 78.2% ( ± 9.2) and 57.3% ( ± 16.7) on day 14 (p = 0.007; p = 0.003). Acute inflammation and the fibrosis gradient were significantly decreased in the SVF group compared to the control group (p = 0.004, p = 0.054 respectively on day 14). Granulation tissue amount, re-epithelialization score and neovascularization were significantly increased in the SVF group (p = 0.006, p = 0.010 and p = 0.021, respectively on day 14).ConclusionsThe study results demonstrated that SVF increases frostbite wound healing by increasing tissue perfusion rate, neovascularization and re-epithelialization, and modulating acute inflammation and fibrosis. |
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| Keywords: | Adipose derived stem cell Burn healing Cold-induced injury Frostbite Stromal vascular fraction |
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