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    Electrospun poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)/silk fibroin film is a promising scaffold for bone tissue engineering

    Year: 2020

    Journal: Int. J. Biol. Macromol., Volume 145, FEB 15, page 173–188

    Authors: Ang, Shaik Ling; Shaharuddin, Bakiah; Chuah, Jo-Ann; Sudesh, Kumar

    Organizations: Top-Down Research Grant from USM-RIKEN International Center for Aging Science (URICAS) [1001/PBIOLOGI/870033]; RUI grant Universiti Sains MalaysiaUniversiti Sains Malaysia [1001/CIPPT/8012263]; Malaysian Ministry of Higher Education through the Mybrain15 scholarship

    Keywords: Polyhydroxyalkanoates; Silk fibroin; Electrospinning; Scaffold; Osteogenesis; Mesenchymal stem cells

    Polyhydroxyalkanoates (PHAs) are biodegradable polyesters produced by microorganisms, under unbalanced growth conditions, as a carbon storage compound. PHAs are composed of various monomers such as 3-hydroxybutyrate (3HB) and 3-hydroxyhexanoate (3HHx). Silk fibroin (SF) derived from Bombyx mori cocoons, is a widely studied protein polymer commonly used for biomaterial applications. In this study, non-woven electrospun films comprising a copolymer of 3HB and 3HHx [P(3HB-co-3HHx)], SF and their blends were prepared by electrospinning technique. The growth and osteogenic differentiation of human umbilical cord derived mesenchymal stem cells (hUC-MSCs) were studied using different types of fabricated electrospun films. The differentiation study revealed that electrospun P(3HB-co-3HHx)/SF film supports the differentiation of hUC-MSCs into the osteogenic lineage, confirmed by histological analysis using Alizarin Red staining, energy dispersive X-ray (EDX) and quantitative real-time PCR analysis (qPCR). Electrospun P(3HB-co-3HHx)/SF film up-regulated the expression of osteogenic marker genes, alkaline phosphatase (ALP) and osteocalcin (OCN), by 1.6-fold and 2.8-fold respectively, after 21 days of osteogenic induction. In conclusion, proliferation and osteogenic differentiation of hUC-MSCs were enhanced through the blending of P(3HB-co-3HHx) and SF. The results from this study suggest that electrospun P(3HB-co-3HHx)/SF film is a promising biomaterial for bone tissue engineering. (C) 2019 Elsevier B.V. All rights reserved.
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