A thermo-responsive, nanofibrous architectured, controlled cell releasing substrate was produced and characterized. Crosslinked PNIPAm fibrous matrix showed to keep its water stability over 7 days, independently from the temperature, while maintaining the typical thermo-responsiveness. Preliminary biological characterization suggest the suitability of this engineered template for a variety of in vitro purposes, including the possible combination with stem cell therapies. Future developments may include additional crosslinking characterizations, in order to ameliorate the production strategy. Variation in fibres orientation and the alternation of topographical patterns may also represent an attractive improvement. In vitro testing may be amplified including genetic expression evaluation and induction and improving stem cells interaction characterization. Finally, the ultimate accomplishment of recreate and harvest continuous 2D tissue layer must be accomplished.
Lo scopo finale di realizzare e caratterizzare un substrato ad architettura nanofibrosa, termosensibile ideale per il rilascio controllato di foglietti cellulari è stato portato a termine. Matrici fibrose realizzate in PNIPAm hanno dimostrato di mantenere la loro stabilità in ambiente acquoso, indipendentemente dalla temperatura, pur mantenendo la loro termo-sensibilità. La preliminare caratterizzazione biologica ha evidenziato come tale substrato si presti in maniera appropriata a numerosi scopi applicativi in vitro, includendo anche la possibile combinazione con terapie a base di cellule staminali. Sviluppi futuri potrebbero prevedere un’ulteriore caratterizzazione del trattamento di crosslinking, ad esempio tramite X-ray Photoelectron Spectroscopy (XPS), di modo da ottimizzare la strategia di produzione delle fibre. E’ possibile completare la caratterizzazione in vitro tramite studio di espressione e induzione genica. Per concludere, future sperimentazioni dovranno interessare la ricostruzione di uno strato tissutale 2D continuo e distaccabile tramite stimolo di temperatura.
Electrospun thermoresponsive nanofibres for cell sheet engineering
FOIS, MARIA GABRIELLA
2016/2017
Abstract
A thermo-responsive, nanofibrous architectured, controlled cell releasing substrate was produced and characterized. Crosslinked PNIPAm fibrous matrix showed to keep its water stability over 7 days, independently from the temperature, while maintaining the typical thermo-responsiveness. Preliminary biological characterization suggest the suitability of this engineered template for a variety of in vitro purposes, including the possible combination with stem cell therapies. Future developments may include additional crosslinking characterizations, in order to ameliorate the production strategy. Variation in fibres orientation and the alternation of topographical patterns may also represent an attractive improvement. In vitro testing may be amplified including genetic expression evaluation and induction and improving stem cells interaction characterization. Finally, the ultimate accomplishment of recreate and harvest continuous 2D tissue layer must be accomplished.File | Dimensione | Formato | |
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2017_10_Fois.pdf
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https://hdl.handle.net/10589/135931