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Zhao H, Liu S, Wei Y, Yue Y, Gao M, Li Y, Zeng X, Deng X, Kotov NA, Guo L, Jiang L. Multiscale engineered artificial tooth enamel. Science 2022; 375:551-556. [PMID: 35113708 DOI: 10.1126/science.abj3343] [Citation(s) in RCA: 86] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Tooth enamel, renowned for its high stiffness, hardness, and viscoelasticity, is an ideal model for designing biomimetic materials, but accurate replication of complex hierarchical organization of high-performance biomaterials in scalable abiological composites is challenging. We engineered an enamel analog with the essential hierarchical structure at multiple scales through assembly of amorphous intergranular phase (AIP)-coated hydroxyapatite nanowires intertwined with polyvinyl alcohol. The nanocomposite simultaneously exhibited high stiffness, hardness, strength, viscoelasticity, and toughness, exceeding the properties of enamel and previously manufactured bulk enamel-inspired materials. The presence of AIP, polymer confinement, and strong interfacial adhesion are all needed for high mechanical performance. This multiscale design is suitable for scalable production of high-performance materials.
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Affiliation(s)
- Hewei Zhao
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Shaojia Liu
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Yan Wei
- Department of Geriatric Dentistry, NMPA Key Laboratory for Dental Materials, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Laboratory of Biomedical Materials, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Yonghai Yue
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Mingrui Gao
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Yangbei Li
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Xiaolong Zeng
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Xuliang Deng
- Department of Geriatric Dentistry, NMPA Key Laboratory for Dental Materials, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Laboratory of Biomedical Materials, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Nicholas A Kotov
- Department of Chemical Engineering, Department of Materials Science, Biointerface Institute, University of Michigan, Ann Arbor, MI 48109, USA.,Michigan Institute of Translational Nanotechnology (MITRAN), Ypsilanti, MI 48198, USA
| | - Lin Guo
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Lei Jiang
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China.,CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, CAS Center for Excellence in Nanoscience, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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2
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Luo L, Li P, Ren H, Ding Z, Yan Y, Li S, Yin J. Effects of bovine cancellous bone powder/poly amino acid composites on cellular behaviors and osteogenic performances. Biomed Mater 2021; 16. [PMID: 34157688 DOI: 10.1088/1748-605x/ac0d94] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 06/22/2021] [Indexed: 11/11/2022]
Abstract
Xenogeneic bone has good biological activity, but eliminating immunogenicity, while retaining osteogenic abilities, is a challenge. By combining xenogeneic bone with poly amino acid (PAA) that has an amide bond structure, a new type of composite conforming to bionics and low immunogenicity may be obtained. In this study, according to the principles of component bionics, three composites of delipidized cancellous bone powder (DCBP) and PAA were designed and obtained by anin situpolycondensation method, an extrusion molding (EM) method, and a solution-blend method. The three composites were all macroscopically uniform, non-cytotoxic, and demonstrated low immunogenicity by effective removal of residual antigens during preparation. Compared with PAA, mouse bone marrow mesenchymal stem cells (BMSCs) on the surfaces of three composites showed different cellular morphologies. The effects of different preparation methods and cellular morphology on cellular differentiation were confirmed by alkaline phosphatase activity, calcium nodule formation and the expression levels of osteogenic differentiation-related genes (bone morphogenetic protein 2, runt-related transcription factor 2, osteopontin and osteocalcin). Among these composites, DCBP/PAA EM showed best cell proliferation and osteogenic differentiationin vitro, and possessed greater bone formation than PAA in a rabbit femoral condyle study. This study may provide a new method for preparing bioactive bone repair materials with low immunogenicity and superior ability to stimulate differentiation of BMSCsin vitroand osteogenesisin vivo. DCBP/PAA EM might be a promising bone repair material for bone defect treatment.
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Affiliation(s)
- Lin Luo
- College of Physics, Sichuan University, Chengdu, People's Republic of China
| | - Pengcheng Li
- College of Physics, Sichuan University, Chengdu, People's Republic of China
| | - Haohao Ren
- College of Physics, Sichuan University, Chengdu, People's Republic of China
| | - Zhengwen Ding
- College of Physics, Sichuan University, Chengdu, People's Republic of China
| | - Yonggang Yan
- College of Physics, Sichuan University, Chengdu, People's Republic of China
| | - Shuyang Li
- Sichuan Provincial Laboratory of Orthopaedic Engineering, The Affiliated Hospital of Southwest Medical University, Luzhou, People's Republic of China
| | - Jie Yin
- School of Automation and Information Engineering, Sichuan University of Science and Engineering, Zigong, People's Republic of China
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3
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Hu J, Zhang R, Chen H, Wu Y, Chen L, Zhang Q, Ren H, Yan Y. The study on calcium polyphosphate/poly-amino acid composite for supportive bone substitute materials in vitro. NEW J CHEM 2021. [DOI: 10.1039/d0nj06128j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A poly-amino acid/calcium polyphosphate composite with high mechanical strength, excellent stability and biological activity was prepared and studied for bone-repaired.
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Affiliation(s)
- Jinbo Hu
- School of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Rongguang Zhang
- School of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Hong Chen
- College of Physics
- Sichuan University
- Chengdu 610065
- China
| | - Yanan Wu
- College of Physics
- Sichuan University
- Chengdu 610065
- China
| | - Lichao Chen
- School of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Qiyi Zhang
- School of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Haohao Ren
- College of Physics
- Sichuan University
- Chengdu 610065
- China
| | - Yonggang Yan
- College of Physics
- Sichuan University
- Chengdu 610065
- China
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4
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Luo L, Li S, Ji M, Ding Z, Yan Y, Yin J, Xiong Y. Preparation of a novel bovine cancellous bone/poly-amino acid composite with low immunogenicity, proper strength, and cytocompatibility in vitro. J Biomed Mater Res A 2020; 109:1490-1501. [PMID: 33258539 DOI: 10.1002/jbm.a.37139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 08/25/2020] [Accepted: 11/28/2020] [Indexed: 02/02/2023]
Abstract
In this work, the delipidized and deproteinized bovine cancellous bone powder/poly-amino acid (DDBP/PAA) composite was fabricated by extrusion-injection molding method for the first time. After about 70% clearance rate by the delipidization and deproteinization procedures, the residual antigens of galactosyl α-(1, 3)-galactosyl β-1,4-N-aeetylglueosaminyl (α-Gal) and major histocompatibility complex (MHC) II were basically eliminated by the extrusion-injection molding process, which may cause high titer of antibody and lead to hyperacute rejection or chronic immune toxicity. Meanwhile, the natural BMP II and apatite in bovine bone were kept in DDBP/PAA composite. After 26 weeks of immersion in simulated body fluid, the DDBP/PAA composite remained the intact appearance, 96.4% of weight, and 69.2% of compressive strength, and these showed sufficient degradation stability. The composite also exhibited excellent attachment and proliferation abilities of mouse bone marrow mesenchymal stem cells (mMSCs). The results herein suggested that the DDBP/PAA composite was expected to be a load-bearing transplant with some natural ingredients for hard tissue repair.
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Affiliation(s)
- Lin Luo
- College of Physics, Sichuan University, Chengdu, Sichuan, China
| | - Shuyang Li
- College of Physics, Sichuan University, Chengdu, Sichuan, China
| | - Mizhi Ji
- College of Physics, Sichuan University, Chengdu, Sichuan, China
| | - Zhengwen Ding
- College of Physics, Sichuan University, Chengdu, Sichuan, China
| | - Yonggang Yan
- College of Physics, Sichuan University, Chengdu, Sichuan, China
| | - Jie Yin
- School of Automation and Information Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, China
| | - Yi Xiong
- College of Physics, Sichuan University, Chengdu, Sichuan, China
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5
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Yanyan S, Guangxin W, Guoqing S, Yaming W, Wuhui L, Osaka A. Effects of amino acids on conversion of calcium carbonate to hydroxyapatite. RSC Adv 2020; 10:37005-37013. [PMID: 35521267 PMCID: PMC9057079 DOI: 10.1039/d0ra07636h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 09/30/2020] [Indexed: 11/21/2022] Open
Abstract
Conversion of calcium carbonate (calcite; CC) to hydroxyapatite (HAp) was examined when the CC particles of sub μm size were soaked at 37 °C for up to 10 d in 0.15 M K2HPO4 (20 ml), whose pH was set to 3-12. Here, the solution contained amino acids, such as glutamine (Glu), arginine (Arg), and glycine (Gly), and their content varied from 0-1.0 g per ml of solution. From the X-ray diffraction (XRD) intensity of the 104 and 211 diffractions of calcite and apatite, respectively, it was seen that the presence of the amino acids promoted the conversion. This was supported by the thermogravimetry (TG) results. The highest promotion was observed at 0.5 g addition of amino acids to the phosphate solution, while Glu showed the highest promotion among the amino acids and Gly the lowest. A scanning electron microscopy study indicated that petal-like HAp nano-crystallites covered the entire surface of the CC particles when they were soaked in the phosphate solution with 0.1 g or more of amino acid for 10 d. The XRD intensity ratio 104(CC)/211(HAp) indicated greater CC to HAp conversion in the solutions at pH 3 and 6 than in the more alkaline solutions. This was attributed to the dissolution of CC in the acidic solutions, which was confirmed by bubbling in these solutions.
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Affiliation(s)
- Sun Yanyan
- Department of Materials Science and Engineering, Henan University of Science and Technology Luoyang Henan Province 471023 China
| | - Wang Guangxin
- Department of Materials Science and Engineering, Henan University of Science and Technology Luoyang Henan Province 471023 China
| | - Sun Guoqing
- School of Vehicle Engineering, Luoyang Institute of Technology Luoyang Henan Province 471023 China
| | - Wang Yaming
- Department of Materials Science and Engineering, Henan University of Science and Technology Luoyang Henan Province 471023 China
| | - Li Wuhui
- Department of Materials Science and Engineering, Henan University of Science and Technology Luoyang Henan Province 471023 China
| | - Akiyoshi Osaka
- Department of Materials Science and Engineering, Henan University of Science and Technology Luoyang Henan Province 471023 China
- Faculty of Engineering, Okayama University Tsushima Okayama 700-8530 Japan
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6
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Enhancement of osteoblast cells osteogenic differentiation and bone regeneration by hydroxyapatite/phosphoester modified poly(amino acid). MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 111:110769. [PMID: 32279769 DOI: 10.1016/j.msec.2020.110769] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 01/27/2020] [Accepted: 02/21/2020] [Indexed: 12/14/2022]
Abstract
Hydroxyapatite/poly(amino acid) (HA/PAA) has been used to treat a variety of long bone and vertebral bony defects, and a further biocompatibility improvement is a key for better application. Phosphoester (PE) contained materials are highly biocompatible but could hardly treat massive bone defects due to its fast-degradation-derived mechanical instability. To address the problems of the two materials, we have incorporated PE molecule into the main chain of PAA by chemical bonding. As a result, the compressive strength of HA/PAA with 1 wt% and 2.5 wt% PE maintained in the range of 80-150 MPa after soaking in PBS for 12 weeks, which could be attributed to the amplified hydrogen-bonding inside composites. Besides, the PE-containing HA/PAAs with increased hydrophilic function groups (O=P-O bonds and O=P-N), created a more favourable surface for cell adhesion. Meanwhile, compared with HA/PAA, the PE-containing HA/PAAs had a fast minerlization speed and promoted cell osteogenic differentiation. Furthermore, the in vivo study indicated that PE-containing HA/PAAs could facilitate bone formation (4 weeks), and form a complete bone bridging (12 weeks) in a rabbit cranial bone defect. In summary, the HA/PE-m-PAAs possessed good mechanical stability, improved cytocompatibility and osteoconductivity, so the composites have a great potential for massive bone defect treatment.
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7
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Wu Y, Ding Z, Ren H, Ji M, Yan Y. Preparation, Characterization and In Vitro Biological Evaluation of a Novel Pearl Powder/Poly-Amino Acid Composite as a Potential Substitute for Bone Repair and Reconstruction. Polymers (Basel) 2019; 11:E831. [PMID: 31071963 PMCID: PMC6572604 DOI: 10.3390/polym11050831] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 04/18/2019] [Accepted: 05/02/2019] [Indexed: 11/16/2022] Open
Abstract
Many studies about fabricating organic-inorganic composite materials have been carried out in order to mimic the natural structure of bone. Pearl, which has a special block-and-mortar hierarchical structure, is a superior bone repair material with high osteogenic activity, but it shows few applications in the clinical bone repair and reconstruction because of its brittle and uneasily shaped properties. In this work, pearl powder (P)/poly (amino acid) (PAA) composites were successfully prepared by a method of in situ melting polycondensation to combine the high osteogenic activity of the pearl and the pliability of the PAA. The mechanical properties, in vitro bioactivity and biocompatibility as well as osteogenic activity of the composites were investigated. The results showed that P/PAA composites have both good mechanical properties and bioactivity. The compressive strength, bending strength and tensile strength of the composites reached a maximum of 161 MPa, 50 MPa and 42 MPa, respectively; in addition, apatite particles successfully deposited on the composites surface after immersion in simulated body fluid (SBF) for 7 days indicated that P/PAA composites showed an enhanced mineralization capacity and bioactivity due to incorporation of pearl powder and PAA. The cell culture results revealed that higher cell proliferation and better adhesion morphology of mouse bone marrow mesenchymal stem cells (MSCs) appeared on the composite surface. Moreover, cells growing on the surface of the composites exhibited higher alkaline phosphatase (ALP) activity, more calcium nodule-formation, and higher expression levels of osteogenic differentiation-related genes (COL 1, RunX2, OCN, and OPN) than cells grown on PAA surface. The P/PAA composites exhibited both superior mechanical properties to the pearl powder, higher bioactivity and osteogenic capability compared with those of PAA.
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Affiliation(s)
- Yanan Wu
- College of Physical Science and Technology, Sichuan University, Chengdu 610064, China.
| | - Zhengwen Ding
- College of Physical Science and Technology, Sichuan University, Chengdu 610064, China.
| | - Haohao Ren
- College of Physical Science and Technology, Sichuan University, Chengdu 610064, China.
| | - Mizhi Ji
- College of Physical Science and Technology, Sichuan University, Chengdu 610064, China.
| | - Yonggang Yan
- College of Physical Science and Technology, Sichuan University, Chengdu 610064, China.
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8
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Zhong Y, Chen X, Peng H, Ding Z, Yan Y. Developing novel Ca-zeolite/poly(amino acid) composites with hemostatic activity for bone substitute applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:1994-2010. [DOI: 10.1080/09205063.2018.1521688] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Yu Zhong
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Xingtao Chen
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Haitao Peng
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Zhengwen Ding
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Yonggang Yan
- College of Physical Science and Technology, Sichuan University, Chengdu, China
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9
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Xiong Y, Li H, Wang P, Liu P, Yan Y. Improved cell adhesion of poly(amino acid) surface by cyclic phosphonate modification for bone tissue engineering. J Appl Polym Sci 2018. [DOI: 10.1002/app.46226] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yi Xiong
- College of Physical Science and Technology; Sichuan University; Chengdu China
| | - Hong Li
- College of Physical Science and Technology; Sichuan University; Chengdu China
| | - Peng Wang
- Sichuan Guona Technology Company; Chengdu China
| | | | - Yonggang Yan
- College of Physical Science and Technology; Sichuan University; Chengdu China
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10
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Evaluation of Bioabsorbable Multiamino Acid Copolymer/Nanohydroxyapatite/Calcium Sulfate Cage in a Goat Spine Model. World Neurosurg 2017; 103:341-347. [PMID: 28408260 DOI: 10.1016/j.wneu.2017.04.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/31/2017] [Accepted: 04/01/2017] [Indexed: 02/05/2023]
Abstract
BACKGROUND Currently, polylactide is the most popular material used to made bioabsorbable cages but too-quick degradation and osteolysis around the cage have been reported in the literature. This study evaluated the fusion effect, biomechanical stability, and histologic characteristics of a novel bioabsorbable multiamino acid copolymer/nanohydroxyapatite/calcium sulfate (MAACP/n-HA/CS) interbody cage in a goat model of anterior cervical discectomy and fusion. METHODS A total of 24 goats underwent C3/C4 discectomy and fusion with 3 groups of intervertebral implants: MAACP/n-HA/CS cage group (n = 8), titanium cage group (n = 8), and autologous tricortical iliac crest bone group (n = 8). Disc space height and lordosis angle were measured pre- and postoperatively and after 4, 12, and 24 weeks. Range of motion (ROM) was evaluated through biomechanical testing. Histologic analysis was performed to evaluate fusion status and to detect any foreign body reactions associated with the bioabsorbable cages. RESULTS At 12 and 24 weeks, disc space height in MAACP/n-HA/CS cage group was greater than that of titanium cage group and tricortical iliac crest group (P < 0.05). Lordosis angle in MAACP/n-HA/CS cage group and titanium cage group were lower than that of tricortical iliac crest group (P < 0.05). Biomechanical test showed that ROM did not differ significantly between MAACP/n-HA/CS cage group and titanium cage group, whereas the value of ROM in bone graft group was the largest. Histologic evaluation showed a better interbody fusion in the MAACP/n-HA/CS cage group than in the other 2 groups. MAACP/n-HA/CS cage surface degraded and was absorbed at 24 weeks. All MAACP/n-HA/CS cages showed excellent biocompatibility. CONCLUSIONS MAACP/n-HA/CS cages can provide good fusion effect, enough biomechanical stability, and integrate closely with the surrounding bone.
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11
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Hashemizadeh I, Tsang DCW, Ng YH, Wu Z, Golovko V, Yip ACK. Bio-mimicking TiO2 architectures for enhanced photocatalytic activity under UV and visible light. RSC Adv 2017. [DOI: 10.1039/c7ra04185c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A multi-step chemical replication method using natural green leaves as templates can produce a porous, visible-light active TiO2-based photocatalyst.
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Affiliation(s)
- Iman Hashemizadeh
- Department of Chemical and Process Engineering
- University of Canterbury
- Christchurch
- New Zealand
| | - Daniel C. W. Tsang
- Department of Civil and Environmental Engineering
- Hong Kong Polytechnic University
- Hong Kong
- China
| | - Yun Hau Ng
- School of Chemical Engineering
- University of New South Wales
- Australia
- The Joint Laboratory for Energy and Environmental Catalysis
- City University of Hong Kong
| | - Zhijie Wu
- State Key Laboratory of Heavy Oil Processing
- The Key Laboratory of Catalysis of CNPC
- China University of Petroleum
- Beijing
- China
| | - Vladimir Golovko
- Department of Chemistry
- University of Canterbury
- Christchurch
- New Zealand
| | - Alex C. K. Yip
- Department of Chemical and Process Engineering
- University of Canterbury
- Christchurch
- New Zealand
- The Joint Laboratory for Energy and Environmental Catalysis
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12
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Naik A, Shepherd DV, Shepherd JH, Best SM, Cameron RE. The effect of the type of HA on the degradation of PLGA/HA composites. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 70:824-831. [PMID: 27770960 DOI: 10.1016/j.msec.2016.09.048] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 08/15/2016] [Accepted: 09/21/2016] [Indexed: 01/05/2023]
Abstract
The aim of this study is to explore the importance of the potentially competing effects of buffering effects of the calcium phosphate filler and particle-mediated water sorption on the degradation products of poly(d,l lactide-co-glycolide (50:50))(PLGA)/hydroxyapatite(HA) composites. Further the influence of type of HA on the mechanical properties of the composites was investigated. Phase pure HA was synthesised via a reaction between aqueous solutions of calcium hydroxide and orthophosphoric acid. The powder produced was either used as produced (uncalcined) or calcined in air or calcined in a humidified argon atmosphere. An in-vitro degradation study was carried out in phosphate buffered saline (PBS). The results obtained indicated that the degradation rate of the composite might be better understood if both the buffering effects and the rate of water sorption by the composites are considered.
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Affiliation(s)
- Ashutosh Naik
- Cambridge Centre for Medical Materials, University of Cambridge, Department of Materials Science and Metallurgy, 27, Charles Babbage Road, Cambridge CB3 0FS, UK.
| | - David V Shepherd
- Cambridge Centre for Medical Materials, University of Cambridge, Department of Materials Science and Metallurgy, 27, Charles Babbage Road, Cambridge CB3 0FS, UK
| | - Jennifer H Shepherd
- Cambridge Centre for Medical Materials, University of Cambridge, Department of Materials Science and Metallurgy, 27, Charles Babbage Road, Cambridge CB3 0FS, UK
| | - Serena M Best
- Cambridge Centre for Medical Materials, University of Cambridge, Department of Materials Science and Metallurgy, 27, Charles Babbage Road, Cambridge CB3 0FS, UK
| | - Ruth E Cameron
- Cambridge Centre for Medical Materials, University of Cambridge, Department of Materials Science and Metallurgy, 27, Charles Babbage Road, Cambridge CB3 0FS, UK
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13
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Mi HY, Jing X, Salick MR, Cordie TM, Turng LS. Carbon nanotube (CNT) and nanofibrillated cellulose (NFC) reinforcement effect on thermoplastic polyurethane (TPU) scaffolds fabricated via phase separation using dimethyl sulfoxide (DMSO) as solvent. J Mech Behav Biomed Mater 2016; 62:417-427. [PMID: 27266475 DOI: 10.1016/j.jmbbm.2016.05.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 05/18/2016] [Accepted: 05/23/2016] [Indexed: 12/15/2022]
Abstract
Although phase separation is a simple method of preparing tissue engineering scaffolds, it suffers from organic solvent residual in the scaffold. Searching for nontoxic solvents and developing effective solvent removal methods are current challenges in scaffold fabrication. In this study, thermoplastic polyurethane (TPU) scaffolds containing carbon nanotubes (CNTs) or nanofibrillated cellulose fibers (NFCs) were prepared using low toxicity dimethyl sulfoxide (DMSO) as a solvent. The effects of two solvent removal approaches on the final scaffold morphology were studied. The freeze drying method caused large pores, with small pores on the pore walls, which created connections between the pores. Meanwhile, the leaching and freeze drying method led to interconnected fine pores with smaller pore diameters. The nucleation effect of CNTs and the phase separation behavior of NFCs in the TPU solution resulted in significant differences in the microstructures of the resulting scaffolds. The mechanical performance of the nanocomposite scaffolds with different morphologies was investigated. Generally, the scaffolds with a fine pore structure showed higher compressive properties, and both the CNTs and NFCs improved the compressive properties of the scaffolds, with greater enhancement found in TPU/NFC nanocomposite scaffolds. In addition, all scaffolds showed good sustainability under cyclical load bearing, and the biocompatibility of the scaffolds was verified via 3T3 fibroblast cell culture.
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Affiliation(s)
- Hao-Yang Mi
- Department of Industrial Equipment and Control Engineering, South China University of Technology, Guangzhou 510640, China; Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Xin Jing
- Department of Industrial Equipment and Control Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Max R Salick
- Department of Engineering Physics, University of Wisconsin-Madison, WI 53706, USA
| | - Travis M Cordie
- Department of Biomedical, University of Wisconsin-Madison, WI 53706, USA
| | - Lih-Sheng Turng
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
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14
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Rahman MM, Netravali AN, Tiimob BJ, Apalangya V, Rangari VK. Bio-inspired “green” nanocomposite using hydroxyapatite synthesized from eggshell waste and soy protein. J Appl Polym Sci 2016. [DOI: 10.1002/app.43477] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Muhammad M. Rahman
- Department of Fiber Science and Apparel Design; Cornell University; Ithaca New York 14853
| | - Anil N. Netravali
- Department of Fiber Science and Apparel Design; Cornell University; Ithaca New York 14853
| | - Boniface J. Tiimob
- Department of Material Science and Engineering; Tuskegee University; Tuskegee Alabama 36088
| | - Vitus Apalangya
- Department of Material Science and Engineering; Tuskegee University; Tuskegee Alabama 36088
| | - Vijaya K. Rangari
- Department of Material Science and Engineering; Tuskegee University; Tuskegee Alabama 36088
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15
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Fan X, Ren H, Luo X, Wang P, Lv G, Yuan H, Li H, Yan Y. Mechanics, degradability, bioactivity, in vitro, and in vivo biocompatibility evaluation of poly(amino acid)/hydroxyapatite/calcium sulfate composite for potential load-bearing bone repair. J Biomater Appl 2015; 30:1261-72. [PMID: 26635202 DOI: 10.1177/0885328215620711] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A ternary composite of poly(amino acid), hydroxyapatite, and calcium sulfate (PAA/HA/CS) was prepared using in situ melting polycondensation method and evaluated in terms of mechanical strengths, in vitro degradability, bioactivity, as well as in vitro and in vivo biocompatibility. The results showed that the ternary composite exhibited a compressive strength of 147 MPa, a bending strength of 121 MPa, a tensile strength of 122 MPa, and a tensile modulus of 4.6 GPa. After immersion in simulated body fluid, the compressive strength of the composite decreased from 147 to 98 MPa for six weeks and the bending strength decreased from 121 to 75 MPa for eight weeks, and both of them kept stable in the following soaking period. The composite could be slowly degraded with 7.27 wt% loss of initial weight after soaking in phosphate buffered solution for three weeks when started to keep stable weight in the following days. The composite was soaked in simulated body fluid solution and the hydroxyapatite layer, as flower-like granules, formed on the surface of the composite samples, showing good bioactivity. Moreover, it was found that the composite could promote proliferation of MG-63 cells, and the cells with normal phenotype extended and spread well on the composite surface. The implantation of the composite into the ulna of sheep confirmed that the composite was biocompatible and osteoconductive in vivo, and offered the PAA/HA/CS composite promising material for load-bearing bone substitutes for clinical application.
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Affiliation(s)
- Xiaoxia Fan
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Haohao Ren
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Xiaoman Luo
- Xpand Biotechnology BV, Bilthoven, The Netherlands
| | - Peng Wang
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Guoyu Lv
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Huipin Yuan
- Tissue Regeneration Department, Twente University, Enschede, The Netherlands
| | - Hong Li
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Yonggang Yan
- College of Physical Science and Technology, Sichuan University, Chengdu, China
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Fan X, Ren H, Liu P, Wang P, Li H, Yan Y, Lv G. Effects of the surface modification of poly(amino acid)/hydroxyapatite/calcium sulfate biocomposites on the adhesion and proliferation of osteoblast-like cells. J Appl Polym Sci 2015. [DOI: 10.1002/app.42427] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaoxia Fan
- College of Physical Science and Technology; Sichuan University; Chengdu 610064 China
| | - Haohao Ren
- College of Physical Science and Technology; Sichuan University; Chengdu 610064 China
| | - Pengzheng Liu
- Sichuan National Nano Technology Company; Chengdu 610041 China
| | - Peng Wang
- College of Physical Science and Technology; Sichuan University; Chengdu 610064 China
| | - Hong Li
- College of Physical Science and Technology; Sichuan University; Chengdu 610064 China
| | - Yonggang Yan
- College of Physical Science and Technology; Sichuan University; Chengdu 610064 China
| | - Guoyu Lv
- College of Physical Science and Technology; Sichuan University; Chengdu 610064 China
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17
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Naik A, Best SM, Cameron RE. The influence of silanisation on the mechanical and degradation behaviour of PLGA/HA composites. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 48:642-50. [PMID: 25579967 DOI: 10.1016/j.msec.2014.12.056] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 10/06/2014] [Accepted: 12/17/2014] [Indexed: 10/24/2022]
Abstract
This study investigates the influence of silanisation on the mechanical and degradation behaviour of PLGA/HA composites. Three different silanes (mercaptopropyl trimethoxy silane (MPTMS), aminopropyl trimethoxy silane (APTMS) and aminopropyltriethoxy silane (APTES)) were applied to HA substrates in order to study the effect of head group (which binds to the polymer) and tail group (which binds to the surface hydroxyl groups in HA). A composite of hydroxyapatite (HA) and poly(d,l lactide-co-glycolide (50:50)) (PLGA) was investigated. The influence of concentration, the reaction time, drying temperature and substrate surface on silanisation was examined. TGA was used to detect the degree of silanisation. HA with MPTMS (1wt.% MPTMS with reaction time of 1h) was used as filler in PLGA-30wt.% HA composites for an in-vitro degradation study carried out in PBS. In addition, the mechanical properties of the composites were studied. Silanisation affects the properties of the composite by improving the bonding at the interface and hence it was found to influence the plastic mechanical properties rather than the elastic mechanical properties or the degradation profile of the composite.
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Affiliation(s)
- Ashutosh Naik
- Cambridge Centre for Medical Materials, University of Cambridge, Department of Materials Science and Metallurgy, 27, Charles Babbage Road, Cambridge CB3 0FS, UK.
| | - Serena M Best
- Cambridge Centre for Medical Materials, University of Cambridge, Department of Materials Science and Metallurgy, 27, Charles Babbage Road, Cambridge CB3 0FS, UK
| | - Ruth E Cameron
- Cambridge Centre for Medical Materials, University of Cambridge, Department of Materials Science and Metallurgy, 27, Charles Babbage Road, Cambridge CB3 0FS, UK
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Basile MA, d'Ayala GG, Malinconico M, Laurienzo P, Coudane J, Nottelet B, Ragione FD, Oliva A. Functionalized PCL/HA nanocomposites as microporous membranes for bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 48:457-68. [PMID: 25579947 DOI: 10.1016/j.msec.2014.12.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 09/15/2014] [Accepted: 12/05/2014] [Indexed: 12/15/2022]
Abstract
In the present work, microporous membranes based on poly(ε-caprolactone) (PCL) and PCL functionalized with amine (PCL-DMAEA) or anhydride groups (PCL-MAGMA) were realized by solvent-non solvent phase inversion and proposed for use in Guided Tissue Regeneration (GTR). Nanowhiskers of hydroxyapatite (HA) were also incorporated in the polymer matrix to realize nanocomposite membranes. Scanning Electron Microscopy (SEM) showed improved interfacial adhesion with HA for functionalized polymers, and highlighted substantial differences in the porosity. A relationship between the developed porous structure of the membrane and the chemical nature of grafted groups was proposed. Compared to virgin PCL, hydrophilicity increases for functionalized PCL, while the addition of HA influences significantly the hydrophilic characteristics only in the case of virgin polymer. A significant increase of in vitro degradation rate was found for PCL-MAGMA based membranes, and at lower extent of PCL-DMAEA membranes. The novel materials were investigated regarding their potential as support for cell growth in bone repair using multipotent mesenchymal stromal cells (MSC) as a model. MSC plated onto the various membranes were analyzed in terms of adhesion, proliferation and osteogenic capacity that resulted to be related to chemical as well as porous structure. In particular, PCL-DMAEA and the relative nanocomposite membranes are the most promising in terms of cell-biomaterial interactions.
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Affiliation(s)
- Maria Assunta Basile
- Institute for Polymers, Composites and Biomaterials, CNR, Via Campi Flegrei 34, Pozzuoli (Naples), Italy
| | - Giovanna Gomez d'Ayala
- Institute for Polymers, Composites and Biomaterials, CNR, Via Campi Flegrei 34, Pozzuoli (Naples), Italy
| | - Mario Malinconico
- Institute for Polymers, Composites and Biomaterials, CNR, Via Campi Flegrei 34, Pozzuoli (Naples), Italy
| | - Paola Laurienzo
- Institute for Polymers, Composites and Biomaterials, CNR, Via Campi Flegrei 34, Pozzuoli (Naples), Italy.
| | - Jean Coudane
- Institut des Biomolécules Max Mousseron (IBMM), Artificial Biopolymers Group, CNRS UMR 5247, University of Montpellier 1, Faculty of Pharmacy, 15 Av. C. Flahault, Montpellier 34093, France
| | - Benjamin Nottelet
- Institut des Biomolécules Max Mousseron (IBMM), Artificial Biopolymers Group, CNRS UMR 5247, University of Montpellier 1, Faculty of Pharmacy, 15 Av. C. Flahault, Montpellier 34093, France
| | - Fulvio Della Ragione
- Department of Biochemistry and Biophysics, Second University of Naples, Via L. De Crecchio 7, Naples, Italy
| | - Adriana Oliva
- Department of Biochemistry and Biophysics, Second University of Naples, Via L. De Crecchio 7, Naples, Italy.
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