title: Biological evaluation of porous aliphatic polyurethane/hydroxyapatite composite scaffolds for bone tissue engineering.
abstract: Biomaterial scaffolds meant to function as supporting structures to osteogenic cells play a pivotal role in bone tissue engineering. Recently, we synthesized an aliphatic polyurethane (PU) scaffold via a foaming method using non-toxic components. Through this procedure a uniform interconnected porous structure was created. Furthermore, hydroxyapatite (HA) particles were introduced into this process to increase the bioactivity of the PU matrix. To evaluate the biological performances of these PU-based scaffolds, their influence on in vitro cellular behavior and in vivo bone forming capacity of the engineered cell-scaffold constructs was investigated in this study. A simulated body fluid test demonstrated that the incorporation of 40 wt % HA particles significantly promoted the biomineralization ability of the PU scaffolds. Enhanced in vitro proliferation and osteogenic differentiation of the seeded mesenchymal stem cells were also observed on the PU/HA composite. Next, the cell-scaffold constructs were implanted subcutaneously in a nude mice model. After 8 weeks, a considerable amount of vascularized bone tissue with initial marrow stroma development was generated in both PU and PU/HA40 scaffold. In conclusion, the PU/HA composite is a potential scaffold for bone regeneration applications.
authors.affiliation: Department of Biomaterials, Radboud University Medical Center, Dentistry, 309, Nijmegen, The Netherlands.|The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, 430079, Wuhan, China.
authors.forename: Wanxun
authors.initials: W
authors.lastname: Yang
authors.affiliation: Department of Biomaterials, Radboud University Medical Center, Dentistry, 309, Nijmegen, The Netherlands.
authors.forename: Sanne K
authors.initials: SK
authors.lastname: Both
authors.affiliation: Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, 610064, Chengdu, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zuo
authors.affiliation: Department of Tissue Regeneration, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, 7500, AE Enschede, The Netherlands.
authors.forename: Zeinab Tahmasebi
authors.initials: ZT
authors.lastname: Birgani
authors.affiliation: Department of Tissue Regeneration, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, 7500, AE Enschede, The Netherlands.
authors.forename: Pamela
authors.initials: P
authors.lastname: Habibovic
authors.affiliation: Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, 610064, Chengdu, China.
authors.forename: Yubao
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Biomaterials, Radboud University Medical Center, Dentistry, 309, Nijmegen, The Netherlands.
authors.forename: John A
authors.initials: JA
authors.lastname: Jansen
authors.affiliation: Department of Biomaterials, Radboud University Medical Center, Dentistry, 309, Nijmegen, The Netherlands.
authors.forename: Fang
authors.initials: F
authors.lastname: Yang
mesh_terms: D000818:Animals; D001672:Biocompatible Materials; D001842:Bone and Bones / Q000502:physiology*; D017886:Durapatite / Q000494:pharmacology*; D008855:Microscopy, Electron, Scanning; D011140:Polyurethanes / Q000494:pharmacology*; D051381:Rats; D023822:Tissue Engineering
chemical_list: D001672:Biocompatible Materials; D011140:Polyurethanes; D017886:Durapatite
keywords: biomaterial; bone regeneration; ectopic bone formation; hydroxyapatite; polyurethane