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Zn-Substituted Mg2sio4 Nanoparticles-Incorporated Pcl-Silk Fibroin Composite Scaffold: A Multifunctional Platform Towards Bone Tissue Regeneration Publisher Pubmed



Bigham A1 ; Salehi AOM2 ; Rafienia M3 ; Salamat MR4 ; Rahmati S3 ; Raucci MG1 ; Ambrosio L1
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Authors Affiliations
  1. 1. Institute of Polymers, Composites and Biomaterials - National Research Council (IPCB-CNR), Viale J.F. Kennedy 54 - Mostra d'Oltremare pad. 20, Naples, 80125, Italy
  2. 2. Biomaterials Group, Faculty of New Sciences and Technologies, Semnan University, Semnan, Iran
  3. 3. Biosensor Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Department of Medical Physics, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Materials Science and Engineering C Published:2021


Abstract

Electrospun porous bone scaffolds are known to imitate the extracellular matrix very well and provide an environment through which the tissue formation is enhanced. Although polymeric scaffolds have a great potential in bone tissue regeneration, their weak bioactivity (bone bonding ability) and mechanical properties have left room for improvement. Therefore, the present study focused on the developing a ternary multifunctional platform composed of polycaprolactone (PCL)/silk fibroin (SF)/Zn-substituted Mg2SiO4 nanoparticles for bone tissue regeneration. This study is composed of two connected sections including synthesis and characterization of Mg(2-x)ZnxSiO4, x = 0, 0.5, 1, 1.5, 2 through surfactant-assisted sol-gel technique followed by incorporation of the nanoparticles into PCL/SF hybrid scaffold via electrospinning technique. The weight ratios of polymers and ceramic nanoparticles were optimized to reach desirable textural—porosity, pore size, and fiber diameter—and mechanical properties. Having optimized the ternary scaffold, it was then undergone different physical, chemical, and biological tests in vitro. A precise comparison study between the ternary (PCL/SF/ceramic nanoparticles), binary (PCL/SF), and pure PCL was made to shed light on the effect of each composition on the applicability of ternary scaffold. The overall results confirmed that the Mg1Zn1SiO4 nanoparticles-incorporated PCL/SF scaffold with fluorescence property was the one yielding the highest Young's modulus and desirable textural properties. The ternary scaffold showed improved biological properties making it a promising candidate for further studies towards bone tissue regeneration. © 2021 Elsevier B.V.
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