Effects of pore orientation on in-vitro properties of retinoic acid-loaded PLGA/gelatin scaffolds for artificial peripheral nerve application

Materials Science & Engineering. C, Materials for Biological Applications
Farnaz GhorbaniHanieh Nojehdehian

Abstract

Different manufacturing processes of scaffolds affect their main properties by altering the microstructure of pores. In this study, poly (lactic-co-glycolic acid) (PLGA) scaffolds were synthesized by both freeze casting and freeze drying methods. Scanning electron microscopy (SEM) micrographs demonstrated a unidirectional microstructure in the freeze-cast and a number of random pores in the freeze-dried scaffolds. According to the results, the formation of a lamellar microstructure increased the mechanical strength, swelling ratio, biodegradation behavior and drug release level. Addition of gelatin to the PLGA freeze-cast constructs led to an increase in the average diameter of pores, hydrophilicity and cellular spreading. The gelatin-containing scaffolds showed a decreased mechanical strength, but at the same time, an enhanced swelling ratio, biodegradation rate and drug release level. Differentiation of P19 cells and expression of β-tubulin III, Pax-6 and Nestin were improved by incorporating retinoic acid in PLGA-Gelatin freeze-cast scaffolds. This is a good option with initial necessary features for regenerating peripheral nervous system (PNS).

Citations

Apr 6, 2020·Biotechnology and Applied Biochemistry·Hessam RezaeiMohammadali Sahebalzamani
Jul 25, 2019·AAPS PharmSciTech·Nermeen A Elkasabgy, Azza A Mahmoud
Dec 18, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Kankan QinFrancisco M Fernandes
Feb 7, 2021·Materials Science & Engineering. C, Materials for Biological Applications·A Izadyari AghmiuniAzim AkbarzadehKhiyavi
May 6, 2019·International Journal of Biological Macromolecules·Mojtaba AbbasianMehdi Jaymand

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