Cell-Based Wound Dressing: Bilayered Pcl/Gelatin Nanofibers-Alginate/Collagen Hydrogel Scaffold Loaded With Mesenchymal Stem Cells Publisher Pubmed



Lashkari M^{1, 2} ; Rahmani M³ ; Yousefpoor Y⁴ ; Ahmadizeidabadi M⁵ ; Faridimajidi R⁶ ; Ameri Z^{1, 7} ; Salary M⁸ ; Azizi S⁹ ; Shahabi A¹ ; Rahi A² ; Mirzaeiparsa MJ^{1, 2, 10}
Source: International Journal of Biological Macromolecules Published:2023

Abstract

Wound dressing is applied to promote the healing process, wound protection, and additionally regeneration of injured skin. In this study, a bilayer scaffold composed of a hydrogel and nanofibers was fabricated to improve the regeneration of injured skin. To this end, polycaprolactone/gelatin (PCL/Gel) nanofibers were electrospun directly on the prepared collagen/alginate (Col/Alg) hydrogel. The bilayer scaffold was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR), mechanical properties, and swelling/degradation time. Cytotoxicity assays were evaluated using MTT assay. Then, the nanofiber and bilayer scaffolds were seeded with Adipose-derived stem cells (ADSCs). ADSCs were isolated from rat adipose tissue and analyzed using flow cytometry, in advance. Full-thickness wounds on the backs of rats were dressed with ADSCs-seeded bilayer scaffolds and nanofibers. Histopathological evaluations were performed after 14 and 21 days using H&E (hematoxylin and eosin) staining. The results indicated that re-epithelialization, angiogenesis, and collagen remodeling were enhanced in ADSCs-seeded bilayer scaffolds and nanofibers in comparison with the control group. In conclusion, the best re-epithelialization, collagen organization, neovascularization, and low presence of inflammation in the wound area were observed in the ADSCs-seeded bilayer scaffolds. © 2023 Elsevier B.V.