Abstract
Skin tissue engineering has progressed from simple wound dressings to biocompatible materials with desired physico-chemical properties that can deliver regenerative biomolecules. This study describes using a novel biomimetic hybrid scaffold of decellularized dermis/collagen fibers that can continuously deliver stromal cell-derived factor-1 alpha (SDF-1α) for skin regeneration. In diabetic rat models, the idea that sustained SDF-1α infusion could increase the recruitment of CXCR4-positive cells at the injury site and improve wound regeneration was investigated. The morphology of the scaffold, its biocompatibility, and the kinetics of SDF-1 release were all assessed. SDF-1α was successfully incorporated into collagen nanofibers, resulting in a 200-h continuous release profile. The microscopic observations exhibited that cells are attached and proliferated on proposed scaffolds. As evaluated by in vivo study and histological examination, fabricated scaffold with SDF-1α release capacity exhibited a remarkably more robust ability to accelerate wound regeneration than the control group. Besides, the SDF-1α-loaded scaffold demonstrated functional effects on the proliferation and recruitment of CD31 and CXCR4-positive cells in the wound bed. Additionally, no adverse effects such as hyperplasia or scarring were found during the treatment period. It may be concluded that the fabricated hybrid scaffold based on natural polymer opens up a new option for topical administration of bioactive molecules. We believe the SDF-1α-loaded hybrid scaffold has promise for skin tissue engineering.
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The data sets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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This work was supported by the Iran University of Medical Sciences (IUMS) through research Grant No.1397–01-117–33032 and the Qom University of Medical Sciences (MUQ) through research Grant No. IR. MUQ. REC. 1398. 121.
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NA, AS, and AH wrote the main manuscript, MGM and MM reviewed the manuscript. SA and SK carried out data analysis. KE and MG prepared figures and validated experiments. AN prepared the supplementary figures. AR and PBM supervised the project and wrote the part of the manuscript with the insights of all other authors. All authors read and approved the final manuscript.
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All institutional and national guidelines for the care and use of laboratory animals were followed. All animal experiments were performed in compliance with guidelines approved by the Animal Use and Care Administrative Advisory Committee at the University of Iran, Tehran, Iran (Ethical code No. IR.IUMS.REC.1398.752). Furthermore, all animal experiments comply with the National Institutes of Health guide for the care and use of laboratory animals (NIH Publications No. 8023, revised 1978).
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Amini, N., Hivechi, A., Asadpour, S. et al. Fabrication and characterization of bilayer scaffolds made of decellularized dermis/nanofibrous collagen for healing of full-thickness wounds. Drug Deliv. and Transl. Res. 13, 1766–1779 (2023). https://doi.org/10.1007/s13346-023-01292-0
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DOI: https://doi.org/10.1007/s13346-023-01292-0