Dexamethasone(DEX), a synthetic steroidal anti-inflammatory drug, is an efficient and dependable drug that induces osteogenic differentiation. The aim of this study is to fabricate the DEX loaded PLGA nanofibers by
electrospinning method. Adipose-derived stem cells(ADSCs) were seeded into the nanofiber and the sustained release of DEX from PLGA nanofiber scaffolds promoted their osteogenic differentiation. The properties of DEX
loaded PLGA nanofiber scaffold were characterized by scanning electron microscopy(SEM) and the release kinetics of DEX from PLGA nanofibers in vitro(1 h to 14 days) was evaluated by high performed liquid chromatography(
HPLC). To evaluate the cellular response of the ADSCs seeded onto DEX loaded PLGA nanofiber, we performed F-actin, cytotoxicity, alkaline phosphatase activity, alizarin red S, von Kossa staining and immunocytochemistry assays for osteogenic differentiation. DEX loaded PLGA nanofiber scaffold was observed to have sustained release in vitro during experimental periods. The cytotoxicity test of the DEX loaded PLGA nanofiber
scaffold indicated there was almost no-toxic effects in regards to proliferation and differentiation of adiposederived stem cells(ADSCs) as compared with a control. Alkaline phosphatase activity and alizarin red S were more
significantly increased after 14days with increased DEX concentration of PLGA nanofiber scaffold than with PLGA nanofiber only. Also, von Kossa staining results confirmed a larger area of calcium deposition with increased DEX concentration of PLGA nanofiber scaffold. We observed that osteocalcin was also increased with increasing DEX concentration. These results demonstrate that DEX acts as an osteogenic inductive factor, and increased DEX concentration promoted more osteogenic differentiation of ADSCs. In conclusion, DEX loaded PLGA nanofiber would be valuable tool for bone tissue regeneration.
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IK Kwon, S Kidoaki, T Matsuda, Electrospun nano- to microfiber fabrics made of biodegradable copolyesters: structural characteristics, mechanical properties and cell adhesion potential, Biomaterials, 26, 3929 (2005).
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Co-Electrospun Nanofiber Fabrics of Poly( l -lactide- co -ε-caprolactone) with Type I Collagen or Heparin
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Electrospinning of Collagen Nanofibers
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Electrospun gelatin/poly(L-lactide-co-epsilon-caprolactone) nanofibers for mechanically functional tissue-engineering scaffolds.
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NR Jorgensen, Z Henriksen, OH Sorensen, et al, Dexamethasone, BMP-2, and 1, 25-dihydroxyvitamin D enhance a more differentiated osteoblast phenotype: validation of an in vitro model for human bone marrow-derived primary osteoblasts, Steroids, 69, 219 (2004).
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Differentiation of human bone marrow osteogenic stromal cells in vitro: induction of the osteoblast phenotype by dexamethasone.
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In vivo evaluation of a dexamethasone/PLGA microsphere system designed to suppress the inflammatory tissue response to implantable medical devices.
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Dexamethasone incorporating liposomes: an in vitro study of their applicability as a slow releasing delivery system of dexamethasone from covered metallic stents
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Human adipose tissue is a source of multipotent stem cells.
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Human Adipose-Derived Adult Stem Cells Produce Osteoid in Vivo
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Differentiation of human adipose stromal cells into hepatic lineage in vitro and in vivo
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Spontaneous cardiomyocyte differentiation from adipose tissue stroma cells.
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Extracellular matrix mineralization and osteoblast gene expression by human adipose tissue-derived stromal cells.
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In vitro characterization of vascular endothelial growth factor and dexamethasone releasing hydrogels for implantable probe coatings.
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Dexamethasone-releasing biodegradable polymer scaffolds fabricated by a gas-foaming/salt-leaching method
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Effect of dexamethasone withdrawal on osteoblastic differentiation of bone marrow stromal cells.
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In vivo bone formation by human marrow stromal cells in biodegradable scaffolds that release dexamethasone and ascorbate-2-phosphate
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Multilineage Potential of Adult Human Mesenchymal Stem Cells
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Formation of three-dimensional cell/polymer constructs for bone tissue engineering in a spinner flask and a rotating wall vessel bioreactor.
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Bone induction by BMP-2 transduced stem cells derived from human fat.
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Bioactivity and osteoblast responses of novel biomedical nanocomposites of bioactive glass nanofiber filled poly(lactic acid)
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Electrospun poly(lactic acid- co-glycolic acid) scaffolds for skin tissue engineering
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Preparation and cytocompatibility of PLGA scaffolds with controllable fiber morphology and diameter using electrospinning method.
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The influence of electrospun aligned poly(ɛ-caprolactone)/collagen nanofiber meshes on the formation of self-aligned skeletal muscle myotubes
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Mechanical responses of a compliant electrospun poly(L-lactide-co-epsilon-caprolactone) small-diameter vascular graft.
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Mesoscopic spatial designs of nano- and microfiber meshes for tissue-engineering matrix and scaffold based on newly devised multilayering and mixing electrospinning techniques.
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Electrospun biomimetic nanocomposite nanofibers of hydroxyapatite/chitosan for bone tissue engineering
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Collagen nanofibres are a biomimetic substrate for the serum-free osteogenic differentiation of human adipose stem cells.
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Electrospun silk-BMP-2 scaffolds for bone tissue engineering
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Optimized bone regeneration based on sustained release from three‐dimensional fibrous PLGA/HAp composite scaffolds loaded with BMP‐2
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Cellular Incorporation Into Electrospun Nanofibers
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Bone regeneration on a collagen sponge self-assembled peptide-amphiphile nanofiber hybrid scaffold.