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Electrospun Poly(3-hydroxybutyrate-co-4-hydroxybutyrate)/Graphene Oxide Scaffold: Enhanced Properties and Promoted in Vivo Bone Repair in Rats.
ACS Applied Materials & Interfaces 2017 December 14
Bone tissue engineering emerges as an advantageous technique to achieve tissue regeneration. Its scaffolds must present excellent biomechanical properties, where bare polymers poorly perform. Development of new biomaterials with high osteogenic capacity is urgently pursued. In this study, an electrospun poly(3-hydroxybutyrate-co-4-hydroxybutyrate)/graphene oxide (P34HB/GO) nanofibrous scaffold is successfully fabricated and characterized. The effects of GO amount on scaffold morphology, biomechanical properties, and cellular behaviors are investigated. GO reduces the fiber diameter and enhances porosity, hydrophilicity, mechanical properties, cellular performance, and osteogenic differentiation of scaffolds. P34HB/GO triumphs over P34HB in in vivo bone regeneration in critical-sized calvarial defect of rats. We believe that this study is the first to evaluate the capability of in vivo bone repair of electrospun P34HB/GO scaffold. With facile fabrication process, favorable porous structures, enhanced biomechanical properties, and fast osteogenic capability, P34HB/GO scaffold holds practical potentials for bone tissue engineering application.
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