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http://dx.doi.org/10.5999/aps.2020.00997

Freeze-dried bovine amniotic membrane as a cell delivery scaffold in a porcine model of radiation-induced chronic wounds  

Oh, Daemyung (Department of Plastic and Reconstructive Surgery, Keimyung University School of Medicine)
Son, Daegu (Department of Plastic and Reconstructive Surgery, Keimyung University School of Medicine)
Kim, Jinhee (Department of Radiation Oncology, Keimyung University School of Medicine)
Kwon, Sun-Young (Department of Pathology, Keimyung University School of Medicine)
Publication Information
Archives of Plastic Surgery / v.48, no.4, 2021 , pp. 448-456 More about this Journal
Abstract
Background Locoregional stem cell delivery is very important for increasing the efficiency of cell therapy. Amnisite BA (Amnisite) is a freeze-dried amniotic membrane harvested from bovine placenta. The objective of this study was to investigate the retention of cells of the stromal vascular fraction (SVF) on Amnisite and to determine the effects of cell-loaded Amnisite in a porcine radiation-induced chronic wound model. Methods Initially, experiments were conducted to find the most suitable hydration and incubation conditions for the attachment of SVF cells extracted from pig fat to Amnisite. Before seeding, SVFs were labeled with PKH67. The SVF cell-loaded Amnisite (group S), Amnisite only (group A), and polyurethane foam (group C) were applied to treat radiation-induced chronic wounds in a porcine model. Biopsy was performed at 10, 14, and 21 days post-operation for histological analysis. Results Retaining the SVF on Amnisite required 30 minutes for hydration and 1 hour for incubation. A PKH67 fluorescence study showed that Amnisite successfully delivered the SVF to the wounds. In histological analysis, group S showed increased re-epithelialization and revascularization with decreased inflammation at 10 days post-operation. Conclusions SVFs had acceptable adherence on hydrated Amnisite, with successful cell delivery to a radiation-induced chronic wound model.
Keywords
Amniotic membrane; Cell therapy; Tissue scaffold; Wound healing; Experimental animal model;
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