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Silk fibroin/amniotic membrane 3D bi-layered artificial skin

Biomed Mater. 2018 Feb 20;13(3):035003. doi: 10.1088/1748-605X/aa999b.

Abstract

Burn injuries have been reported to be an important cause of morbidity and mortality and they are still considered as unmet clinical need. Although there is a myriad of effective stem cells that have been suggested for skin regeneration, there is no one ideal scaffold. The aim of this study was to develop a three-dimensional (3D) bi-layer scaffold made of biological decellularized human amniotic membrane (AM) with viscoelastic electrospun nanofibrous silk fibroin (ESF) spun on top. The fabricated 3D bi-layer AM/ESF scaffold was submerged in ethanol to induce β-sheet transformation as well as to get a tightly coated and inseparable bi-layer. The biomechanical and biological properties of the 3D bi-layer AM/ESF scaffold were investigated. The results indicate significantly improved mechanical properties of the AM/ESF compared with the AM alone. Both the AM and AM/ESF possess a variety of suitable adhesion cells without detectable cytotoxicity against adipose tissue-derived mesenchymal stem cells (AT-MSCs). The AT-MSCs show increased expression of two main pro-angiogenesis factors, vascular endothelial growth factor and basic fibroblast growth factor, when cultured on the AM/ESF for 7 days, when comparing with AM alone. The results suggest that the AM/ESF scaffold with autologous AT-MSCs has excellent cell adhesion and proliferation along with production of growth factors which serves as a possible application in a clinical setting for skin regeneration.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amnion / metabolism*
  • Animals
  • Biomechanical Phenomena
  • Cell Adhesion / drug effects
  • Cell Proliferation / drug effects
  • Elasticity
  • Electrochemistry
  • Ethanol / chemistry
  • Fibroins / chemistry*
  • Humans
  • Magnetic Resonance Spectroscopy
  • Mesenchymal Stem Cells / cytology*
  • Mice
  • Mice, Inbred BALB C
  • Nanofibers
  • Neovascularization, Pathologic
  • Neovascularization, Physiologic
  • Regeneration
  • Skin / injuries
  • Skin, Artificial*
  • Spectroscopy, Fourier Transform Infrared
  • Stress, Mechanical
  • Tissue Engineering / methods
  • Tissue Scaffolds
  • Viscosity

Substances

  • Ethanol
  • Fibroins