1
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Shin Y, Becker ML. Gradient versus End-Capped Degradable Polymer Sequence Variations Result in Stiff to Elastic Photochemically 3D-Printed Substrates. Biomacromolecules 2022; 23:2106-2115. [PMID: 35471033 DOI: 10.1021/acs.biomac.2c00103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Additive manufacturing affords the construction of complex scaffolds for tissue engineering, yet the limitation in material choice remains a barrier to clinical translation. Herein, a series of poly(propylene fumarate-co-propylene succinate) were synthesized using both one-pot and sequential ring-opening copolymerization reactions. Continuous liquid interface production-based photochemical 3D printing utilizing thiol-ene chemistry was used to fabricate precise structures with improved build time over the traditional poly(propylene fumarate)/diethyl fumarate 3D printing processes. Significantly, the materials do not exhibit a yield point under tension and Young's modulus of the 3D printed products can be tuned by more than 2 orders of magnitude (0.6-110 MPa) using polymer composition and the degree of polymerization. Printed constructs degrade fully under hydrolytic conditions and degradation rates can be tailored using polymer composition, polymer sequence, and resin formulation.
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Affiliation(s)
- Yongjun Shin
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Matthew L Becker
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States.,Thomas Lord Department of Mechanical Engineering & Materials Science, Department of Biomedical Engineering, Department of Orthopaedic Surgery, Duke University, Durham, North Carolina 27708, United States
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2
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Wei J, Yan Y, Gao J, Li Y, Wang R, Wang J, Zou Q, Zuo Y, Zhu M, Li J. 3D-printed hydroxyapatite microspheres reinforced PLGA scaffolds for bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 133:112618. [PMID: 35031175 DOI: 10.1016/j.msec.2021.112618] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/13/2021] [Accepted: 12/14/2021] [Indexed: 01/01/2023]
Abstract
Bone tissue engineering scaffolds with similar composition, structure, and mechanical properties to natural bone are conducive to bone regeneration. The objective of this study was to prepare hydroxyapatite/poly (lactic-co-glycolic acid) (HA/PLGA) three-dimensional porous scaffolds with HA content close to natural bone and strong mechanical strength to promote osteogenesis. To achieve this, we modified HA microspheres with polyvinyl alcohol to create an inorganic filler to endow the HA/PLGA printing ink with higher HA content and excellent printing fluidity for 3D printing. We successfully printed a series of HA/PLGA scaffolds with different HA contents. The highest HA content reached 60 wt%, which is close to the mineral percentage in natural bone. The composition, structure, mechanical properties, and in vitro degradability of the fabricated scaffolds were systematically characterized. The cytocompatibility and osteogenic activity of the fabricated HA/PLGA scaffolds were evaluated by in vitro cell culture and rabbit femoral defect repair experiments in vivo. The results indicated that the HA/PLGA composite scaffold with 45 wt% HA had the highest compressive strength of more than 40 MPa, which was six times higher than that of the pure PLGA scaffold. The incorporation of HA microspheres into the PLGA matrix significantly improved the cell adhesion, proliferation, and osteogenic differentiation of bone marrow stem cells (BMSCs) cultured on the surface of the scaffolds. Animal experiments showed that the HA/PLGA composite with 45 wt% HA exhibited the best structure maintenance and osteogenic performance in vivo. The prepared HA/PLGA composite 3D scaffold with HA microsphere reinforcement has considerable application potential in the field of large bone defect repair.
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Affiliation(s)
- Jiawei Wei
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu 610064, PR China
| | - Yan Yan
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu 610064, PR China
| | - Jing Gao
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu 610064, PR China
| | - Yubao Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu 610064, PR China
| | - Ruili Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Jiexin Wang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Qin Zou
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu 610064, PR China
| | - Yi Zuo
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu 610064, PR China
| | - Meifang Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China.
| | - Jidong Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu 610064, PR China.
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3
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Razazpour F, Najafi F, Moshaverinia A, Fatemi SM, Sima S. Synthesis and characterization of a photo-cross-linked bioactive polycaprolactone-based osteoconductive biocomposite. J Biomed Mater Res A 2021; 109:1858-1868. [PMID: 33830598 DOI: 10.1002/jbm.a.37178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 02/26/2021] [Accepted: 03/24/2021] [Indexed: 01/06/2023]
Abstract
In this study, a light cross-linkable biocomposite scaffold based on a photo-cross-linkable poly (propylene fumarate) (PPF)-co-polycaprolactone (PCL) tri-block copolymer was synthesized and characterized. The developed biodegradable scaffold was further modified with β-tricalcium phosphate (β-TCP) bioceramic for bone tissue engineering applications. The developed biocomposite was characterized using H nuclear magnetic resonance and Fourier transform infrared spectroscopy. Moreover, the bioceramic particle size distribution and morphology were evaluated using Brunauer-Emmett-Teller method, X-ray diffraction, and scanning electron microscopy. The mechanical properties and biodegradation of the scaffolds were also evaluated. Cytotoxicity and mineralization assays were performed to analyze the biocompatibility and bioactivity capacity of the developed biocomposite. The characterization data confirmed the development of a biodegradable and photo-cross-linkable PCL-based biocomposite reinforced with β-TCP bioceramic. In vitro analyses demonstrated the biocompatibility and mineralization potential of the synthesized bioceramic. Altogether, the results of the present study suggest that the photo-cross-linkable PCL-PPF-PCL tri-block copolymer reinforced with β-TCP is a promising biocomposite for bone tissue engineering applications. According to the results, this newly synthesized material has a proper chemical composition for further clinically-relevant studies in tissue engineering.
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Affiliation(s)
- Fateme Razazpour
- Department of Dental Biomaterials, School of Dentistry/Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Farhood Najafi
- Department of Resin and Additives, Institute for Color Science and Technology, Tehran, Iran
| | - Alireza Moshaverinia
- Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, California, USA
| | - Seyyed Mostafa Fatemi
- Department of Dental Materials, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Medical Laser Research Center, ACER, Tehran, Iran
| | - Shahabi Sima
- Department of Dental Biomaterials, School of Dentistry/Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Iranian Dental Biomaterials Association, Tehran, Iran
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Careta O, Fornell J, Pellicer E, Ibañez E, Blanquer A, Esteve J, Sort J, Murillo G, Nogués C. ZnO Nanosheet-Coated TiZrPdSiNb Alloy as a Piezoelectric Hybrid Material for Self-Stimulating Orthopedic Implants. Biomedicines 2021; 9:biomedicines9040352. [PMID: 33808338 PMCID: PMC8065972 DOI: 10.3390/biomedicines9040352] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 03/24/2021] [Accepted: 03/27/2021] [Indexed: 12/22/2022] Open
Abstract
A Ti-based alloy (Ti45Zr15Pd30Si5Nb5) with already proven excellent mechanical and biocompatibility features has been coated with piezoelectric zinc oxide (ZnO) to induce the electrical self-stimulation of cells. ZnO was grown onto the pristine alloy in two different morphologies: a flat dense film and an array of nanosheets. The effect of the combined material on osteoblasts (electrically stimulable cells) was analyzed in terms of proliferation, cell adhesion, expression of differentiation markers and induction of calcium transients. Although both ZnO structures were biocompatible and did not induce inflammatory response, only the array of ZnO nanosheets was able to induce calcium transients, which improved the proliferation of Saos-2 cells and enhanced the expression of some early differentiation expression genes. The usual motion of the cells imposes strain to the ZnO nanosheets, which, in turn, create local electric fields owing to their piezoelectric character. These electric fields cause the opening of calcium voltage gates and boost cell proliferation and early differentiation. Thus, the modification of the Ti45Zr15Pd30Si5Nb5 surface with an array of ZnO nanosheets endows the alloy with smart characteristics, making it capable of electric self-stimulation.
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Affiliation(s)
- Oriol Careta
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (O.C.); (E.I.); (A.B.)
| | - Jordina Fornell
- Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (J.F.); (J.S.)
| | - Eva Pellicer
- Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (J.F.); (J.S.)
- Correspondence: (E.P.); (G.M.); (C.N.); Tel.: +34-935812776 (C.N.)
| | - Elena Ibañez
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (O.C.); (E.I.); (A.B.)
| | - Andreu Blanquer
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (O.C.); (E.I.); (A.B.)
| | - Jaume Esteve
- Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), C/del Til·lers, Campus UAB, E-08193 Bellaterra (Cerdanyola del Vallès), Spain;
| | - Jordi Sort
- Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (J.F.); (J.S.)
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys 23, E-08180 Barcelona, Spain
| | - Gonzalo Murillo
- Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), C/del Til·lers, Campus UAB, E-08193 Bellaterra (Cerdanyola del Vallès), Spain;
- Correspondence: (E.P.); (G.M.); (C.N.); Tel.: +34-935812776 (C.N.)
| | - Carme Nogués
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain; (O.C.); (E.I.); (A.B.)
- Correspondence: (E.P.); (G.M.); (C.N.); Tel.: +34-935812776 (C.N.)
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5
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Fabrication and properties of βTCP/Zeolite/Gelatin scaffold as developed scaffold in bone regeneration: in vitro and in vivo studies. Biocybern Biomed Eng 2020. [DOI: 10.1016/j.bbe.2020.10.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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6
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Kumar S, Nehra M, Kedia D, Dilbaghi N, Tankeshwar K, Kim KH. Nanotechnology-based biomaterials for orthopaedic applications: Recent advances and future prospects. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 106:110154. [DOI: 10.1016/j.msec.2019.110154] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 08/04/2019] [Accepted: 08/31/2019] [Indexed: 12/13/2022]
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7
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Preparation of biomimetic composites of hydroxyapatite and star-shaped poly(2,2-dimethyl trimethylene carbonate)s terminated with carboxyl end-groups. POLYMER 2020. [DOI: 10.1016/j.polymer.2019.122078] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Prowans P, Kowalczyk R, Wiszniewska B, Czapla N, Bargiel P, El Fray M. Bone Healing in the Presence of a Biodegradable PBS-DLA Copolyester and Its Composite Containing Hydroxyapatite. ACS OMEGA 2019; 4:19765-19771. [PMID: 31788608 PMCID: PMC6882124 DOI: 10.1021/acsomega.9b02539] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 10/15/2019] [Indexed: 06/10/2023]
Abstract
The healing process of the fractured bone in a presence of poly(butylene succinate-butylene dilinoleate) (PBS-DLA) copolymer containing nanosized hydroxyapatite (HAP) particles has been investigated. The PBS-DLA material containing PBS hard segments and DLA soft segments (50:50 wt %) was used to prepare a polymer/ceramic composite with 30 wt % HAP. A new PBS-DLA copolymer showed a high elasticity of 500% and 15 MPa tensile strength. Addition of HAP improved tensile strength up to 25 MPa while high elasticity has been preserved going down only to 300% of elongation at break. A polymer nanocomposite was fabricated into small elastic polymer rods 15 mm long and 1 × 2 mm in cross section and used for tibia bone fixation in rats. Mallory trichrome staining indicated that new biodegradable copolymers and its composite containing HAP have triggered the most advanced bone healing of all tested materials, thus indicating their high potential for bone tissue engineering and repair.
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Affiliation(s)
- Piotr Prowans
- Clinic
of Plastic, Endocrine and General Surgery, Pomeranian Medical University, ul. Siedlecka 2, 72-010 Police, Poland
| | - Robert Kowalczyk
- Clinic
of Maxillofacial Surgery, Pomeranian Medical
University, ul. Unii
Lubelskiej 1, 71-252 Szczecin, Poland
| | - Barbara Wiszniewska
- Department
of Histology and Embryology, Pomeranian
Medical University, Al.
Powstańców Wlkp. 72, 70-111 Szczecin, Poland
| | - Norbert Czapla
- Clinic
of Plastic, Endocrine and General Surgery, Pomeranian Medical University, ul. Siedlecka 2, 72-010 Police, Poland
| | - Piotr Bargiel
- Clinic
of Plastic, Endocrine and General Surgery, Pomeranian Medical University, ul. Siedlecka 2, 72-010 Police, Poland
| | - Miroslawa El Fray
- Department
of Polymer and Biomaterials Science, Faculty of Chemical Technology
and Engineering, West Pomeranian University
of Technology, Szczecin, Al. Piastow 45, 71-311 Szczecin, Poland
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9
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Chahal S, Kumar A, Hussian FSJ. Development of biomimetic electrospun polymeric biomaterials for bone tissue engineering. A review. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:1308-1355. [DOI: 10.1080/09205063.2019.1630699] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Sugandha Chahal
- Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Kuantan, Pahang, Malaysia
| | - Anuj Kumar
- Natural Resources Institute Finland (Luke), Espoo, Finland
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10
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Abbasian M, Massoumi B, Mohammad-Rezaei R, Samadian H, Jaymand M. Scaffolding polymeric biomaterials: Are naturally occurring biological macromolecules more appropriate for tissue engineering? Int J Biol Macromol 2019; 134:673-694. [PMID: 31054302 DOI: 10.1016/j.ijbiomac.2019.04.197] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/15/2019] [Accepted: 04/30/2019] [Indexed: 12/14/2022]
Abstract
Nowadays, tissue and organ failures resulted from injury, aging accounts, diseases or other type of damages is one of the most important health problems with an increasing incidence worldwide. Current treatments have limitations including, low graft efficiency, shortage of donor organs, as well as immunological problems. In this context, tissue engineering (TE) was introduced as a novel and versatile approach for restoring tissue/organ function using living cells, scaffold and bioactive (macro-)molecules. Among these, scaffold as a three-dimensional (3D) support material, provide physical and chemical cues for seeding cells and has an essential role in cell missions. Among the wide verity of scaffolding materials, natural or synthetic biopolymers are the most commonly biomaterials mainly due to their unique physicochemical and biological features. In this context, naturally occurring biological macromolecules are particular of interest owing to their low immunogenicity, excellent biocompatibility and cytocompatibility, as well as antigenicity that qualified them as popular choices for scaffolding applications. In this review, we highlighted the potentials of natural and synthetic polymers as scaffolding materials. The properties, advantages, and disadvantages of both polymer types as well as the current status, challenges, and recent progresses regarding the application of them as scaffolding biomaterials are also discussed.
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Affiliation(s)
- Mojtaba Abbasian
- Department of Chemistry, Payame Noor University, P.O. Box: 19395-3697, Tehran, Iran
| | - Bakhshali Massoumi
- Department of Chemistry, Payame Noor University, P.O. Box: 19395-3697, Tehran, Iran
| | - Rahim Mohammad-Rezaei
- Analytical Chemistry Research Laboratory, Faculty of Sciences, Azarbaijan Shahid Madani University, P.O. Box: 53714-161, Tabriz, Iran
| | - Hadi Samadian
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mehdi Jaymand
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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11
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Li J, Liu X, Park S, Miller AL, Terzic A, Lu L. Strontium-substituted hydroxyapatite stimulates osteogenesis on poly(propylene fumarate) nanocomposite scaffolds. J Biomed Mater Res A 2019; 107:631-642. [PMID: 30422387 PMCID: PMC7224963 DOI: 10.1002/jbm.a.36579] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/09/2018] [Accepted: 11/05/2018] [Indexed: 12/11/2022]
Abstract
Incorporation of hydroxyapatite (HA) into polymer networks is a promising strategy to enhance the mechanical properties and osteoinductivity of the composite scaffolds for bone tissue engineering. In this study, we designed a group of nanocomposite scaffolds based on cross-linkable poly(propylene fumarate) (PPF) and 30 wt % strontium-hydroxyapatite (Sr-HA) nanoparticles. Four different Sr contents [Sr:(Sr + Ca), molar ratio] in the Sr-HA particles were studied: 0% (HA), 5% (Sr5-HA), 10% (Sr10-HA), and 20% (Sr20-HA). Two-dimensional (2D) disks were prepared using a thermal crosslinking method. The structure and surface morphology of different Sr-HA and PPF/Sr-HA composites were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and atomic force microscopy (AFM). To detect cellular responses in vitro, MC3T3-E1 cells were seeded and cultured on the different PPF/Sr-HA composite disks. Cell morphology after 24 h and 5 days were imaged using Live/Dead live cell staining and SEM, respectively. Cell proliferation was quantified using an MTS assay at 1, 4, and 7 days. Osteogenic differentiation of the cells was examined by alkaline phosphatase (ALP) staining at 10 days and quantified using ALP activity and osteocalcin assays at 7, 14, and 21 days. The sizes of the HA, Sr5-HA, Sr10-HA, and Sr20-HA particles were mainly between 10 × 20 nm and 10 × 250 nm, and these nanoparticles were dispersed or clustered in the composite scaffolds. in vitro cell studies showed that the PPF/Sr10-HA scaffold was significantly better than the other three groups (PPF/HA, PPF/Sr5-HA, and PPF/Sr20-HA) in supporting MC3T3-E1 cell adhesion, proliferation, and differentiation. PPF/Sr10-HA may, therefore, serve as a promising scaffold material for bone tissue engineering. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 631-642, 2019.
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Affiliation(s)
- Jingfeng Li
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota 55905, USA
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China
| | - Xifeng Liu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota 55905, USA
| | - Sungjo Park
- Department of Cardiovascular Diseases and Center for Regenerative Medicine, Mayo Clinic, Rochester, Minnesota 55905, USA
| | - A. Lee Miller
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota 55905, USA
| | - Andre Terzic
- Department of Cardiovascular Diseases and Center for Regenerative Medicine, Mayo Clinic, Rochester, Minnesota 55905, USA
| | - Lichun Lu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota 55905, USA
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12
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Shirdar MR, Farajpour N, Shahbazian-Yassar R, Shokuhfar T. Nanocomposite materials in orthopedic applications. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-018-1764-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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13
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Martinelli NM, Ribeiro MJG, Ricci R, Marques MA, Lobo AO, Marciano FR. In Vitro Osteogenesis Stimulation via Nano-Hydroxyapatite/Carbon Nanotube Thin Films on Biomedical Stainless Steel. MATERIALS (BASEL, SWITZERLAND) 2018; 11:ma11091555. [PMID: 30158449 PMCID: PMC6164324 DOI: 10.3390/ma11091555] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 05/25/2018] [Accepted: 06/04/2018] [Indexed: 02/06/2023]
Abstract
We evaluated the electrophoretic deposition of nanohydroxyapatite/superhydrop hilic multiwalled carbon nanotube composites (nHAp/MWCNT) onto stainless steel biomedical alloys for applications in bone tissue engineering. First, nHAp/MWCNT composites were dispersed into 0.042 mol·L−1 of Ca(NO3)2·4H2O + 0.025 mol·L−1 NH4H2PO4 electrolytes (pH = 4.8) at two different concentrations. Next, a voltage of −2 V was applied using 316L stainless steel as a working electrode (0.27 cm2), a high-purity platinum coil wire was used as the auxiliary electrode, and an Ag/AgCl (3 M) electrode was used as the reference electrode. The nHAp/MWCNT composites were characterized by transmission electron microscopy. The deposited nHAp and nHAp/MWCNT films were characterized by profilometry, scanning electron microscopy, X-ray diffractometry and Raman spectroscopy. Human osteoblast cells were cultivated with the different materials and in vitro cytotoxicity was evaluated using lactate dehydrogenase (LDH) assay. The osteogenesis process was evaluated by mRNA levels of the three genes that are directly related to bone repair: Alkaline Phosphatase, Osteopontin and Osteocalcin. We showed that rough, crystalline apatite thin films containing phases of nHAp were successfully deposited onto 316L stainless steel alloys. Also, we noticed that nHAp/MWCNT thin films deposited onto 316L stainless steel alloys upregulated the expression of important genes related to bone mineralization and maturation. Our results strongly support the possibility of this new alternative to modify the surface of metallic biomedical alloys to promote bone tissue regeneration.
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Affiliation(s)
- Natalia M Martinelli
- Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, Av. Shishima Hifumi 2911, Bairro Urbanova, São José dos Campos, São Paulo 12244-000, Brazil.
| | - Maria Julia G Ribeiro
- Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, Av. Shishima Hifumi 2911, Bairro Urbanova, São José dos Campos, São Paulo 12244-000, Brazil.
| | - Ritchelli Ricci
- Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, Av. Shishima Hifumi 2911, Bairro Urbanova, São José dos Campos, São Paulo 12244-000, Brazil.
| | - Miller A Marques
- Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, Av. Shishima Hifumi 2911, Bairro Urbanova, São José dos Campos, São Paulo 12244-000, Brazil.
| | - Anderson Oliveira Lobo
- Instituto de Ciência e Tecnologia, Universidade Brasil, Rua Carolina da Fonseca 584, Bairro Itaquera, São Paulo 08230-030, Brazil.
| | - Fernanda Roberta Marciano
- Instituto de Ciência e Tecnologia, Universidade Brasil, Rua Carolina da Fonseca 584, Bairro Itaquera, São Paulo 08230-030, Brazil.
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14
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Miao S, Zhu W, Castro NJ, Leng J, Zhang LG. Four-Dimensional Printing Hierarchy Scaffolds with Highly Biocompatible Smart Polymers for Tissue Engineering Applications. Tissue Eng Part C Methods 2017; 22:952-963. [PMID: 28195832 DOI: 10.1089/ten.tec.2015.0542] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The objective of this study was to four-dimensional (4D) print novel biomimetic gradient tissue scaffolds with highly biocompatible naturally derived smart polymers. The term "4D printing" refers to the inherent smart shape transformation of fabricated constructs when implanted minimally invasively for seamless and dynamic integration. For this purpose, a series of novel shape memory polymers with excellent biocompatibility and tunable shape changing effects were synthesized and cured in the presence of three-dimensional printed sacrificial molds, which were subsequently dissolved to create controllable and graded porosity within the scaffold. Surface morphology, thermal, mechanical, and biocompatible properties as well as shape memory effects of the synthesized smart polymers and resultant porous scaffolds were characterized. Fourier transform infrared spectroscopy and gel content analysis confirmed the formation of chemical crosslinking by reacting polycaprolactone triol and castor oil with multi-isocyanate groups. Differential scanning calorimetry revealed an adjustable glass transition temperature in a range from -8°C to 35°C. Uniaxial compression testing indicated that the obtained polymers, possessing a highly crosslinked interpenetrating polymeric networks, have similar compressive modulus to polycaprolactone. Shape memory tests revealed that the smart polymers display finely tunable recovery speed and exhibit greater than 92% shape fixing at -18°C or 0°C and full shape recovery at physiological temperature. Scanning electron microscopy analysis of fabricated scaffolds revealed a graded microporous structure, which mimics the nonuniform distribution of porosity found within natural tissues. With polycaprolactone serving as a control, human bone marrow-derived mesenchymal stem cell adhesion, proliferation, and differentiation greatly increased on our novel smart polymers. The current work will significantly advance the future design and development of novel and functional biomedical scaffolds with advanced 4D printing technology and highly biocompatible smart biomaterials.
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Affiliation(s)
- Shida Miao
- 1 Department of Mechanical and Aerospace Engineering, The George Washington University , Washington, DC
| | - Wei Zhu
- 1 Department of Mechanical and Aerospace Engineering, The George Washington University , Washington, DC
| | - Nathan J Castro
- 1 Department of Mechanical and Aerospace Engineering, The George Washington University , Washington, DC
| | - Jinsong Leng
- 2 Center for Composite Materials and Structures, Harbin Institute of Technology , Harbin, P.R. China
| | - Lijie Grace Zhang
- 1 Department of Mechanical and Aerospace Engineering, The George Washington University , Washington, DC.,3 Department of Biomedical Engineering, The George Washington University , Washington, DC.,4 Department of Medicine, The George Washington University , Washington, DC
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15
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Trachtenberg JE, Placone JK, Smith BT, Fisher JP, Mikos AG. Extrusion-based 3D printing of poly(propylene fumarate) scaffolds with hydroxyapatite gradients. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2017; 28:532-554. [PMID: 28125380 PMCID: PMC5597446 DOI: 10.1080/09205063.2017.1286184] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 01/20/2017] [Indexed: 12/30/2022]
Abstract
The primary focus of this work is to present the current challenges of printing scaffolds with concentration gradients of nanoparticles with an aim to improve the processing of these scaffolds. Furthermore, we address how print fidelity is related to material composition and emphasize the importance of considering this relationship when developing complex scaffolds for bone implants. The ability to create complex tissues is becoming increasingly relevant in the tissue engineering community. For bone tissue engineering applications, this work demonstrates the ability to use extrusion-based printing techniques to control the spatial deposition of hydroxyapatite (HA) nanoparticles in a 3D composite scaffold. In doing so, we combined the benefits of synthetic, degradable polymers, such as poly(propylene fumarate) (PPF), with osteoconductive HA nanoparticles that provide robust compressive mechanical properties. Furthermore, the final 3D printed scaffolds consisted of well-defined layers with interconnected pores, two critical features for a successful bone implant. To demonstrate a controlled gradient of HA, thermogravimetric analysis was carried out to quantify HA on a per-layer basis. Moreover, we non-destructively evaluated the tendency of HA particles to aggregate within PPF using micro-computed tomography (μCT). This work provides insight for proper fabrication and characterization of composite scaffolds containing particle gradients and has broad applicability for future efforts in fabricating complex scaffolds for tissue engineering applications.
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Key Words
- (Tukey’s) Honestly Significant Difference test, HSD
- Analysis of variance, ANOVA
- Atomic force microscopy, AFM
- Diethyl fumarate, DEF
- Dimethyl sulfoxide, DMSO
- Extracellular matrix, ECM
- Fourier transform-infrared spectroscopy, FT-IR
- Hydroxyapatite, HA
- Micro-computed tomography, μCT.
- Phenylbis(246-trimethylbenzoyl)-phosphine oxide, BAPO
- Poly(propylene fumarate), PPF
- Poly(propylene fumarate)-co-poly(ε-caprolactone), PPF-co-PCL
- Polydispersity index, PDI
- Scanning electron microscopy, SEM
- Sodium dodecyl sulfate, SDS
- Stereolithography, STL
- Thermogravimetric analysis, TGA
- Viscosity
- bone tissue engineering
- composites
- compressive modulus
- gradient
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Affiliation(s)
| | - Jesse K. Placone
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
| | | | - John P. Fisher
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
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16
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Haidari S, Boskov M, Schillinger U, Bissinger O, Wolff KD, Plank C, Kolk A. Functional analysis of bioactivated and antiinfective PDLLA - coated surfaces. J Biomed Mater Res A 2017; 105:1672-1683. [PMID: 28218496 DOI: 10.1002/jbm.a.36042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 02/16/2017] [Indexed: 12/20/2022]
Abstract
Common scaffold surfaces such as titanium can have side effects; for example, infections, cytotoxicity, impaired osseointegration, or low regeneration rates for bone tissue. These effects lead to poor implant integration or even implant loss. Therefore, bioactive implants are promising instruments in tissue regeneration. Osteoinductive elements-such as growth factors and anti-infectives-support wound healing and bone growth and thereby enable faster osseointegration, even in elderly patients. In this study, titanium surfaces were coated with a poly-(d,l-lactide) (PDLLA) layer containing different concentrations of copolymer-protected gene vectors (COPROGs) to locally provide bone morphogenetic protein-2 (BMP-2) or activated anti-infective agents, such as chlorhexidine gluconate, triclosan, and metronidazole, to prevent peri-implantitis. The coated titanium implants were then loaded with osteoblasts, NIH 3T3 fibroblasts, and human mesenchymal stem cells in 96-well plates. When shielded by COPROGs as a protective layer and resuspended in PDLLA, BMP-2-encoding pDNA at relatively low doses (5.63 µg/implant) induced the local expression of BMP-2. A linear dose dependence, which is common for recombinant growth factors, was not found, probably due to the retention property of the PDLLA surface. PDLLA, in general, successfully retains additional elements, such as osteoconductive growth factors (BMP-2) and anti-infective agents, which was demonstrated using metronidazole, and thus prevents the systemic application of excessive doses. These bioactive implant surfaces that provide the local release of therapeutic gene vectors or anti-infective agents allow the controlled stimulation of the implant and scaffold osseointegration. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 1672-1683, 2017.
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Affiliation(s)
- Selgai Haidari
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar der Technischen Universität München, Munich, 81675, Germany
| | - Marko Boskov
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar der Technischen Universität München, Munich, 81675, Germany
| | - Ulrike Schillinger
- Institute of Molecular Immunology - Experimental Oncology, Klinikum rechts der Isar der Technischen Universität München, Munich, 81675, Germany
| | - Oliver Bissinger
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar der Technischen Universität München, Munich, 81675, Germany
| | - Klaus-Dietrich Wolff
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar der Technischen Universität München, Munich, 81675, Germany
| | - Christian Plank
- Institute of Molecular Immunology - Experimental Oncology, Klinikum rechts der Isar der Technischen Universität München, Munich, 81675, Germany
| | - Andreas Kolk
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar der Technischen Universität München, Munich, 81675, Germany.,Institute of Molecular Immunology - Experimental Oncology, Klinikum rechts der Isar der Technischen Universität München, Munich, 81675, Germany
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17
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Uskoković V, Iyer MA, Wu VM. One Ion to Rule Them All: Combined Antibacterial, Osteoinductive and Anticancer Properties of Selenite-Incorporated Hydroxyapatite. J Mater Chem B 2017; 5:1430-1445. [PMID: 28944060 DOI: 10.1039/c6tb03387c] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Although hydroxyapatite (HAp) has been doped with dozens of different ions, the quest for an ion imparting a combination of properties conducive to bone healing is still ongoing. Because of its protean potency and the similarity in size and shape to the phosphate tetrahedron, selenite ion presents a natural ionic substitute in HAp. The incorporation of selenite into synthetic HAp using two different methods - co-precipitation and ion-exchange sorption - was studied for its effect on crystal properties and on a triad of biological responses: antibacterial, anticancer and osteoinductive. Co-precipitation yielded HAp with higher selenite contents than sorption and the stoichiometry of HAp richest in selenite was represented as Ca9.75(PO4)5.75(SeO3)0.25(OH)1.75. Crystallinity of HAp decreased in direct proportion with the amount of selenite incorporated. Because of their lower selenite content, HAp powders prepared by ion-exchange exhibited a consistently higher crystallinity compared to the co-precipitated ones. Annealing partially recovered the crystallinity, yet the difference in crystallinity between powders prepared by co-precipitation and by ion-exchange remained, suggesting that the amorphization is mainly due to structural incorporation of selenite, not its effect on the crystal growth kinetics. The addition of selenite changed the morphology of HAp nanoparticles from acicular to rounded and affected the crystal lattice parameters in different ways depending on whether the powders were annealed or not. As for the annealed powders, the incorporation of selenite contracted the lattice in both a and c crystallographic directions. In the agar diffusion assay, the effectiveness of HAp was more dependent on the presence or absence of selenite in it than on its concentration and was highest against E. coli and S. aureus, moderately high against S. enteritidis and ineffective against P. aeruginosa. In liquid inoculation tests, on the other hand, the antibacterial activity of HAp was directly proportional to the amount of selenite contained in it. The viability of K7M2 osteosarcoma cells decreased in direct proportion with the amount of selenite in HAp and was significantly different from the untreated control and from pure HAp at contents equal to or higher than 1.9 wt.%. In contrast, no reduction was observed in the viability of primary fibroblasts treated with HAp incorporating different amounts of selenite ions, suggesting their potentially selective anticancer activity: lethal for the cancer cells and harmless for the healthy cells. Finally, mRNA expression of bone gamma-carboxyglutamate protein (BGLAP3) was higher in differentiated MC3T3-E1 osteoblastic cells treated with selenite-incorporated HAp particles than in cells treated with pure HAp. The osteoinductive effect was due to an overall higher metabolic activity of cells treated with the particles and not due to increased proliferation. In such a way, a triad of antibacterial, osteoinductive and anticancer activities was attributed to selenite-incorporated HAp.
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Affiliation(s)
- Vuk Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, Department of Biomedical and Pharmaceutical Sciences, Chapman University, Irvine, CA 92618-1908, USA.,Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, IL 60607-7052, USA
| | - Maheshwar Adiraj Iyer
- Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, IL 60607-7052, USA
| | - Victoria M Wu
- Advanced Materials and Nanobiotechnology Laboratory, Department of Biomedical and Pharmaceutical Sciences, Chapman University, Irvine, CA 92618-1908, USA.,Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, IL 60607-7052, USA
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18
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Loiola LMD, Fasce LA, da Silva LCE, Gonçalves MC, Frontini PM, Felisberti MI. Thermal and mechanical properties of nanocomposites based on a PLLA-b
-PEO-b
-PLLA triblock copolymer and nanohydroxyapatite. J Appl Polym Sci 2016. [DOI: 10.1002/app.44187] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lívia M. D. Loiola
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas São Paulo Brazil
| | - Laura A. Fasce
- Universidad Nacional De Mar Del Plata, Instituto De Investigaciones En Ciencia Y Tecnología De Materiales; INTEMA, J.B. Justo 4302 - B7608 FDQ - Mar Del Plata Argentina
| | - Laura C. E. da Silva
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas São Paulo Brazil
| | - Maria C. Gonçalves
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas São Paulo Brazil
| | - Patricia M. Frontini
- Universidad Nacional De Mar Del Plata, Instituto De Investigaciones En Ciencia Y Tecnología De Materiales; INTEMA, J.B. Justo 4302 - B7608 FDQ - Mar Del Plata Argentina
| | - Maria I. Felisberti
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas São Paulo Brazil
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19
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Wu CC, Hsu LH, Sumi S, Yang KC, Yang SH. Injectable and biodegradable composite bone filler composed of poly(propylene fumarate) and calcium phosphate ceramic for vertebral augmentation procedure: An in vivo
porcine study. J Biomed Mater Res B Appl Biomater 2016; 105:2232-2243. [DOI: 10.1002/jbm.b.33678] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 03/29/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Chang-Chin Wu
- Department of Orthopedics; National Taiwan University Hospital, College of Medicine, National Taiwan University; Taipei 10002 Taiwan
- Department of Orthopedics; En Chu Kong Hospital; New Taipei City 23702 Taiwan
| | - Li-Ho Hsu
- Department of Orthopedics; National Taiwan University Hospital, College of Medicine, National Taiwan University; Taipei 10002 Taiwan
- Department of Orthopedics; En Chu Kong Hospital; New Taipei City 23702 Taiwan
| | - Shoichiro Sumi
- Department of Organ Reconstruction; Institute for Frontier Medical Sciences, Kyoto University; Kyoto 606-8507 Japan
| | - Kai-Chiang Yang
- Department of Organ Reconstruction; Institute for Frontier Medical Sciences, Kyoto University; Kyoto 606-8507 Japan
- School of Dental Technology, College of Oral Medicine, Taipei Medical University; Taipei 11031 Taiwan
| | - Shu-Hua Yang
- Department of Orthopedics; National Taiwan University Hospital, College of Medicine, National Taiwan University; Taipei 10002 Taiwan
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20
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Effect of Polymer Concentration, Rotational Speed, and Solvent Mixture on Fiber Formation Using Forcespinning®. FIBERS 2016. [DOI: 10.3390/fib4020020] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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21
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Tollemar V, Collier ZJ, Mohammed MK, Lee MJ, Ameer GA, Reid RR. Stem cells, growth factors and scaffolds in craniofacial regenerative medicine. Genes Dis 2016; 3:56-71. [PMID: 27239485 PMCID: PMC4880030 DOI: 10.1016/j.gendis.2015.09.004] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 09/22/2015] [Indexed: 02/08/2023] Open
Abstract
Current reconstructive approaches to large craniofacial skeletal defects are often complicated and challenging. Critical-sized defects are unable to heal via natural regenerative processes and require surgical intervention, traditionally involving autologous bone (mainly in the form of nonvascularized grafts) or alloplasts. Autologous bone grafts remain the gold standard of care in spite of the associated risk of donor site morbidity. Tissue engineering approaches represent a promising alternative that would serve to facilitate bone regeneration even in large craniofacial skeletal defects. This strategy has been tested in a myriad of iterations by utilizing a variety of osteoconductive scaffold materials, osteoblastic stem cells, as well as osteoinductive growth factors and small molecules. One of the major challenges facing tissue engineers is creating a scaffold fulfilling the properties necessary for controlled bone regeneration. These properties include osteoconduction, osetoinduction, biocompatibility, biodegradability, vascularization, and progenitor cell retention. This review will provide an overview of how optimization of the aforementioned scaffold parameters facilitates bone regenerative capabilities as well as a discussion of common osteoconductive scaffold materials.
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Affiliation(s)
- Viktor Tollemar
- The University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA
- Department of Orthopedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Laboratory of Craniofacial Biology and Development, Section of Plastic and Reconstructive Surgery, Department of Surgery, The University of Chicago Medicine, Chicago, IL 60637, USA
| | - Zach J. Collier
- The University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA
- Department of Orthopedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Maryam K. Mohammed
- The University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA
- Department of Orthopedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Michael J. Lee
- Department of Orthopedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Guillermo A. Ameer
- Department of Surgery, Feinberg School of Medicine, Chicago, IL 60611, USA
- Biomedical Engineering Department, Northwestern University, Evanston, IL 60208, USA
| | - Russell R. Reid
- Laboratory of Craniofacial Biology and Development, Section of Plastic and Reconstructive Surgery, Department of Surgery, The University of Chicago Medicine, Chicago, IL 60637, USA
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22
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Thakur T, Xavier JR, Cross L, Jaiswal MK, Mondragon E, Kaunas R, Gaharwar AK. Photocrosslinkable and elastomeric hydrogels for bone regeneration. J Biomed Mater Res A 2016; 104:879-88. [PMID: 26650507 DOI: 10.1002/jbm.a.35621] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 11/06/2015] [Accepted: 12/02/2015] [Indexed: 11/11/2022]
Abstract
Nanocomposite biomaterials are extensively investigated for cell and tissue engineering applications due their unique physical, chemical and biological characteristics. Here, we investigated the mechanical, rheological, and degradation properties of photocrosslinkable and elastomeric nanocomposite hydrogels from nanohydroxyapatite (nHAp) and gelatin methacryloyl (GelMA). The addition of nHAp resulted in a significant increase in mechanical stiffness and physiological stability. Cells readily adhere and proliferate on the nanocomposite surfaces. Cyclic stretching of cells on the elastomeric nanocomposites revealed that nHAp elicited a stronger alignment response in the direction of strain. In vitro studies highlight enhanced bioactivity of nanocomposites as determined by alkaline phosphate (ALP) activity. Overall, the elastomeric and photocrosslinkable nanocomposite hydrogels can be used for minimally invasive therapy for bone regeneration.
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Affiliation(s)
- Teena Thakur
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843
| | - Janet R Xavier
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843
| | - Lauren Cross
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843
| | - Manish K Jaiswal
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843
| | - Eli Mondragon
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843
| | - Roland Kaunas
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843
| | - Akhilesh K Gaharwar
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843.,Department of Materials Science and Engineering, Texas A&M University, College Station, Texas, 77843.,Center for Remote Health Technologies and Systems, Texas A&M University, College Station, Texas, 77843
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