title: Osteoblast differentiation of mesenchymal stem cells on modified PES-PEG electrospun fibrous composites loaded with Zn2SiO4bioceramic nanoparticles.
abstract: Tissue engineering has attracted a great deal of interest by combining fibrous scaffolds and stem cells regarding bone regeneration applications. In the present study, polymeric fibrous polyethersulphone-polyethylene glycol (PES-PEG) was fabricated by electrospinning. It was then treated with NH3plasma to enhance surface hydrophilicity, cell attachment, growth and differentiation potential. X-ray photoelectron spectroscopy (XPS) measurements were used to evaluate the modification of the scaffold's surface chemistry. Electrospun scaffolds were coated with willemite (Zn2SiO4) bioceramic nanoparticles. Scaffold characterization was done by scanning electron microscope (SEM), differential scanning calorimetry (DSC), contact angle measurements and tensile analysis. MTT assay was used to assess the biocompatibility of fibrous scaffolds loaded with Zn2SiO4regarding proliferation support. Osteogenic differentiation of cultured human mesenchymal stem cells (hMSCs) on fibers was evaluated using common osteogenic markers such as alkaline phosphatase (ALP) activity, calcium mineral deposition, quantitative real-time PCR (qPCR) and immunocytochemical analysis (ICC). According to the results, proliferation and osteogenic differentiation of hMSCs were significantly enhanced after coating Zn2SiO4on fibrous scaffolds. These results were detected by higher ALP activity, biomineralization and expression of osteogenic related genes and proteins in differentiated hMSCs. In conclusion, our results indicated that the combination of Zn2SiO4nanoparticles and electrospun fibers is able to provide a new, suitable and more efficient matrix to support stem cells differentiation for bone tissue engineering applications.
authors: Department of Medical Nanotechnology, Faculty of Advanced Sciences and Technology, Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS ), Tehran, Iran.
authors: Bahram
authors: B
authors: Amiri
authors: Department of Cell and Molecular Biology, Faculty of Biological Science, Kharazmi University, Tehran, Iran.
authors: Marzieh
authors: M
authors: Ghollasi
authors: Department of Polymer Engineering and Color Techology, Amirkabir University of Technology, Tehran, Iran.
authors: Mohsen
authors: M
authors: Shahrousvand
authors: Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
authors: Mehdi
authors: M
authors: Kamali
authors: Nanobiotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran. Electronic address: Salimiali@bmsu.ac.ir.
authors: Ali
authors: A
authors: Salimi
mesh_terms: D000469:Alkaline Phosphatase / Q000096:biosynthesis; D001861:Bone Regeneration / Q000187:drug effects; D002454:Cell Differentiation / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects; D006801:Humans; D059630:Mesenchymal Stem Cells / Q000187:drug effects*; D053758:Nanoparticles / Q000008:administration & dosage* / Q000737:chemistry; D010006:Osteoblasts / Q000187:drug effects; D010012:Osteogenesis / Q000187:drug effects*; D011092:Polyethylene Glycols / Q000008:administration & dosage / Q000737:chemistry; D011108:Polymers / Q000008:administration & dosage / Q000737:chemistry; D012822:Silicon Dioxide / Q000008:administration & dosage / Q000737:chemistry; D013450:Sulfones / Q000008:administration & dosage / Q000737:chemistry; D023822:Tissue Engineering; D054457:Tissue Scaffolds; D015032:Zinc / Q000008:administration & dosage / Q000737:chemistry
chemical_list: D011108:Polymers; D013450:Sulfones; C022840:polyether sulfone; D011092:Polyethylene Glycols; D012822:Silicon Dioxide; D000469:Alkaline Phosphatase; D015032:Zinc
keywords: Mesenchymal stem cells; Osteoblast differentiation; PES-PEG fibers; Zn(2)SiO(4) nanoparticles