کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5434747 | 1509142 | 2017 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrospinning of PVA/sericin nanofiber and the effect on epithelial-mesenchymal transition of A549 cells Electrospinning of PVA/sericin nanofiber and the effect on epithelial-mesenchymal transition of A549 cells](/preview/png/5434747.png)
- Systematical report on PVA/Sericin electrospin process.
- The nanofibrous niche might induce the epithelial-mesenchymal transition of A549 cell.
- MMP-9 significantly responses to nanofibrous culturing surface.
This research aims to investigate the cell-nanomaterial interaction between epithelial-mesenchymal transition of A549 cell and electrospinning nanofibers composed of polyvinyl alcohol (PVA)/silk sericin (SS). The electrospinning of regenerated nanofiber was performed with water as a spinning solvent and glutaraldehyde as a chemical cross-linker. Solution concentration, applied voltage and spin distances as well as other parameters were optimized to generate fine nanofibers with smooth surface in good homogeneity. From the scanning electron microscopy (SEM) analysis, the nanofibers had an average diameter of 200Â nm. Epithelial-mesenchymal transition (EMT) is a process by which epithelial cells lose their cell polarity to become mesenchymal stem cells. This transition is affected by multiple biochemical and physical factors in cell metabolism cascade. Herein, we investigate the biophysical effect on A549 EMT by culturing cells on nanofibrous mats with different topography and composition. The cell viability was evaluated by biochemical assay and its morphology was observed with SEM. The results demonstrate that cells appropriately attached to the surface of the nanofibrous mats with extended morphology by their filopodia. Gene expression analysis was conducted by real-time PCR using multiple markers for detecting EMT: N-cadherin (NCad), Vimentin (Vim), Fibronectin (Fib) and Matrix metallopeptidase (MMP9). An increasing expression pattern was observed on NCad, Vim, Fib, with respect to a negative control as cell cultured on polystyrene dish. This result indicates the 200Â nm PVA/SS nanofibers may induce A549 cells to process epithelial-mesenchymal transition during the culturing.
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Journal: Materials Science and Engineering: C - Volume 79, 1 October 2017, Pages 436-444