title: Stimulation of osteogenic and angiogenic ability of cells on polymers by pulsed laser deposition of uniform akermanite-glass nanolayer.
abstract: Polymer biomaterials have been widely used for bone replacement/regeneration because of their unique mechanical properties and workability. Their inherent low bioactivity makes them lack osseointegration with host bone tissue. For this reason, bioactive inorganic particles have been always incorporated into the matrix of polymers to improve their bioactivity. However, mixing inorganic particles with polymers always results in inhomogeneity of particle distribution in polymer matrix with limited bioactivity. This study sets out to apply the pulsed laser deposition (PLD) technique to prepare uniform akermanite (Ca2MgSi2O7, AKT) glass nanocoatings on the surface of two polymers (non-degradable polysulfone (PSU) and degradable polylactic acid (PDLLA)) in order to improve their surface osteogenic and angiogenic activity. The results show that a uniform nanolayer composed of amorphous AKT particles (∼30 nm) of thickness 130 nm forms on the surface of both PSU and PDLLA films with the PLD technique. The prepared AKT-PSU and AKT-PDLLA films significantly improved the surface roughness, hydrophilicity, hardness and apatite mineralization, compared with pure PSU and PDLLA, respectively. The prepared AKT nanocoatings distinctively enhance the alkaline phosphate (ALP) activity and bone-related gene expression (ALP, OCN, OPN and Col I) of bone-forming cells on both PSU and PDLLA films. Furthermore, AKT nanocoatings on two polymers improve the attachment, proliferation, VEGF secretion and expression of proangiogenic factors and their receptors of human umbilical vein endothelial cells (HUVEC). The results suggest that PLD-prepared bioceramic nanocoatings are very useful for enhancing the physicochemical, osteogenic and angiogenic properties of both degradable and non-degradable polymers for application in bone replacement/regeneration.
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. Electronic address: chengtiewu@mail.sic.ac.cn.
authors.forename: Chengtie
authors.initials: C
authors.lastname: Wu
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Zhai
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Hongshi
authors.initials: H
authors.lastname: Ma
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Li
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Yali
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Institute of Health & Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland 4059, Australia.
authors.forename: Yinghong
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Yongxiang
authors.initials: Y
authors.lastname: Luo
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Yueyue
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Institute of Health & Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland 4059, Australia.
authors.forename: Yin
authors.initials: Y
authors.lastname: Xiao
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. Electronic address: jchang@mail.sic.ac.cn.
authors.forename: Jiang
authors.initials: J
authors.lastname: Chang
mesh_terms: D016475:3T3 Cells; D000818:Animals; D001842:Bone and Bones / Q000378:metabolism; D002516:Ceramics; D020869:Gene Expression Profiling; D005898:Glass; D007834:Lasers; D051379:Mice; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures; D018919:Neovascularization, Physiologic; D010012:Osteogenesis; D011108:Polymers / Q000737:chemistry*
chemical_list: D011108:Polymers; C023506:Glass ceramics
keywords: Angiogenic; Bone regeneration; Osteogenic; Polymers; Pulsed laser deposition