title: New Generation of Tunable Bioactive Shape Memory Mats Integrated with Genetically Engineered Proteins.
abstract: Aligned poly(l-lactide)/poly(methyl methacrylate) binary blend fibers and mats loaded with a chimeric green fluorescence protein having a bioactive peptide with hydroxyapatite binding and mineralization property are prepared by pressurized gyration. The effect of processing parameters on the product morphologies, and the shape memory properties of these samples are investigated. Integration of hydroxyapatite nanoparticles into the fiber assembly is self-directed using the hydroxyapatite-binding property of the peptide genetically engineered to green fluorescence protein. Fluorescence microscopy analysis corroborated with Fourier transform infrared spectroscopy (FTIR) data confirms the integration of the chimeric protein with the fibers. An enzyme based remineralization assay is conducted to study the effects of peptide-mediated mineralization within the fiber mats. Raman and FTIR spectral changes observed following the peptide-mediated mineralization provides an initial step toward a soft-hard material transition. These results show that programmable shape memory properties can be obtained by incorporating genetically engineered bioactive peptide domains into polymer fibers.
authors.affiliation: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, 29 Xueyuan Road, Beijing, 100083, China.|Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK.
authors.forename: Xiaowen
authors.initials: X
authors.lastname: Wu
authors.affiliation: Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK.
authors.forename: Suntharavathanan
authors.initials: S
authors.lastname: Mahalingam
authors.affiliation: Bioengineering Research Center (BERC), Department of Mechanical Engineering, University of Kansas (KU), Lawrence, KS, 66045, USA.
authors.forename: Sarah Kay
authors.initials: SK
authors.lastname: VanOosten
authors.affiliation: Bioengineering Research Center (BERC), Department of Mechanical Engineering, University of Kansas (KU), Lawrence, KS, 66045, USA.
authors.forename: Cate
authors.initials: C
authors.lastname: Wisdom
authors.affiliation: Bioengineering Research Center (BERC), Department of Mechanical Engineering, University of Kansas (KU), Lawrence, KS, 66045, USA.
authors.forename: Candan
authors.initials: C
authors.lastname: Tamerler
authors.affiliation: Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK.
authors.forename: Mohan
authors.initials: M
authors.lastname: Edirisinghe
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D055119:Elastic Modulus; D049452:Green Fluorescent Proteins / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008856:Microscopy, Fluorescence; D010316:Particle Size; D011091:Polyesters / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D011312:Pressure; D015202:Protein Engineering / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013696:Temperature
chemical_list: D001672:Biocompatible Materials; D011091:Polyesters; D049452:Green Fluorescent Proteins; C033616:poly(lactide); D019904:Polymethyl Methacrylate
keywords: genetically engineered proteins; peptide based mineralization; polymer; pressurized gyration; shape memory