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Cold atmospheric plasma modification and electrical conductivity induction in gelatin/polyvinylidene fluoride nanofibers for neural tissue engineering

Sahrayi, H ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1111/aor.14258
  3. Publisher: John Wiley and Sons Inc , 2022
  4. Abstract:
  5. Background: This research follows some investigations through neural tissue engineering, including fabrication, surface treatment, and evaluation of novel self-stimuli conductive biocompatible and degradable nanocomposite scaffolds. Methods: Gelatin as a biobased material and polyvinylidene fluoride (PVDF) as a mechanical, electrical, and piezoelectric improvement agent were co-electrospun. In addition, polyaniline/graphene (PAG) nanoparticles were synthesized and added to gelatin solutions in different percentages to induce electrical conductivity. After obtaining optimum PAG percentage, cold atmospheric plasma (CAP) treatment was applied over the best samples by different plasma variable parameters. Finally, the biocompatibility of the scaffolds was analyzed and approved by in vitro tests using two different PC12 and C6 cell lines. In the present study the morphology, FTIR, dynamic light scattering, mechanical properties, wettability, contact angle tests, differential scanning calorimetric, rate of degradation, conductivity, biocompatibility, gene expression, DAPI staining, and cell proliferation were investigated. Results: The PAG percentage optimization results revealed fiber diameter reduction, conductivity enhancement, young's modulus improvement, hydrophilicity devaluation, water uptake decrement, and degradability reduction in electrospun nanofibers by increasing the PAG concentration. Furthermore, ATR-FTIR, FE-SEM, AFM, and contact angle tests revealed that helium CAP treatment improves scaffold characterizations for 90 s in duration time. Furthermore, the results of the MTT assay, FE-SEM, DAPI staining, and RT-PCR revealed that samples containing 2.5% w/w of PAG are the most biocompatible, and CAP treatment increases cell proliferation and improves neural gene expression in the differentiation medium. Conclusions: According to the results, the samples with the 2.5% w/w of PAG could provide a suitable matrix for neural tissue engineering in terms of physicochemical and biological. © 2022 International Center for Artificial Organ and Transplantation (ICAOT) and Wiley Periodicals LLC
  6. Keywords:
  7. Biomaterials ; Conductive polymers ; Polyaniline ; Biomechanics ; Cell proliferation ; Conducting polymers ; Contact angle ; Elastic moduli ; Electric conductivity ; Fluorine compounds ; Gene expression ; Light scattering ; Morphology ; Scaffolds (biology) ; Surface treatment ; Synthesis (chemical) ; Tissue ; Atmospheric plasma treatments ; Cold atmospheric plasmas ; Conductive Polymer ; Electrical conductivity ; Electrospinning ; Genes expression ; Neural tissue engineering ; Plasma modifications ; Polyvinylidene fluorides ; Surface evaluations ; Biocompatibility ; Gelatin ; Graphene ; Nanocomposite ; Nanofiber ; Nanoparticle ; Fluorocarbon ; Polyester ; Polyvinyl derivative ; polyvinylidene fluoride ; Animal cell ; Animal tissue ; Biodegradability ; Biological trait ; C6 cell line (glioma) ; Cell differentiation ; Controlled study ; Differential scanning calorimetry ; Extracellular matrix ; Fourier transform infrared spectroscopy ; In vitro study ; Nanofabrication ; Nervous tissue ; Nonhuman ; PC12 cell line (pheochromocytoma) ; Photon correlation spectroscopy ; Physical chemistry ; Piezoelectricity ; Plasma ; Rat ; Staining ; Surface property ; Synthesis ; Wettability ; Chemistry ; Plasma gas ; Procedures ; Tissue scaffold ; Fluorocarbon Polymers ; Graphite ; Nanofibers ; Plasma Gases ; Polyesters ; Polyvinyls ; Tissue engineering ; Tissue Scaffolds
  8. Source: Artificial Organs ; Volume 46, Issue 8 , 2022 , Pages 1504-1521 ; 0160564X (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/abs/10.1111/aor.14258