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Kang L, Liu C, Ye J, Niu W, Cui X, Zhu Y, Xue L, Zhang J, Zheng L, Li Y, Zhang B. Polypyrrole regulates Active Sites in Co-based Catalyst in Direct Borohydride Fuel Cells. CHEMSUSCHEM 2024; 17:e202301622. [PMID: 38100189 DOI: 10.1002/cssc.202301622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/10/2023] [Indexed: 01/13/2024]
Abstract
Direct borohydride fuel cells (DBFCs) convert borohydride (NaBH4) chemical energy into clean electricity. However, catalytic active site deactivation in NaBH4 solution limits their performance and stability. We propose a strategy to regulate active sites in Co-based catalysts using polypyrrole modification (Co-PX catalyst) to enhance electrochemical borohydride oxidation reaction (eBOR). As an anode catalyst, the synthesized Co-PX catalyst exhibits excellent eBOR performance in DBFCs, with current density of 280 mA ⋅ cm-2 and power density of 151 mW ⋅ cm-2, nearly twice that of the unmodified catalyst. The Co-PX catalyst shows no degradation after 120-hour operation, unlike the rapidly degrading control. In-situ electrochemical attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIRS) and density functional theory (DFT) suggest that polypyrrole-modified carbon support regulate the charge distribution, increasing oxidation state and optimizing adsorption/desorption of intermediates. A possible reaction pathway is proposed. This work presents a promising strategy for efficient polymer-modulated catalysts in advanced DBFCs.
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Affiliation(s)
- Lin Kang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Cheng Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Jinyu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Wenzhe Niu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Xiaowen Cui
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Yajie Zhu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Liangyao Xue
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Jiaqi Zhang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Youyong Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Bo Zhang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
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Xu T, Yang L, Zhang X, Lu G, Bai Z. A highly sensitive electrochemical sensor by growing Ag nanoparticles on the surface of PPy@PEDOT:PSS film for detecting sodium hydroxymethanesulfinate molecules. Food Chem X 2023; 18:100701. [PMID: 37397227 PMCID: PMC10314181 DOI: 10.1016/j.fochx.2023.100701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 04/26/2023] [Accepted: 04/30/2023] [Indexed: 07/04/2023] Open
Abstract
A high-sensitivity electrochemical sensor was fabricated via in situ growth of Ag nanoparticles (AgNPs) on the surface of a polypyrrole@poly(3,4-ethylenedioxythiophene):polystyrene sulfonic acid (PPy@PEDOT:PSS) film for detecting sodium hydroxymethanesulfinate (SHF) molecules in milk and rice flour samples. The sensor fabrication process involved randomly decorating Ag seed points on the porous PPy@PEDOT:PSS film via a chemical reduction process using a AgNO3 solution. Next, AgNPs were anchored on the PPy@PEDOT:PSS film surface using an electrochemical deposition method to prepare a sensor electrode. Under optimal conditions, the sensor exhibits a good linear relation within a range of 1-130 ng/mL for real milk and rice flour samples and its limit-of-detection values were up to 0.58 and 0.29 ng/mL, respectively. Additionally, Raman spectroscopy was used to identify the byproducts of the chemical reaction, such as formaldehyde. This AgNP/PPy@PEDOT:PSS film-based electrochemical sensor offers a simple and rapid method for detecting SHF molecules in food products.
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Affiliation(s)
- Tianwen Xu
- College of Medicine, Guizhou University, Guiyang City 550025, China
- Guizhou Province Key Lab. for Photoelectric Technology and Application, Guizhou University, Guiyang City 550025, China
| | - Li Yang
- College of Medicine, Guizhou University, Guiyang City 550025, China
- Guizhou Province Key Lab. for Photoelectric Technology and Application, Guizhou University, Guiyang City 550025, China
| | - Xin Zhang
- Guizhou Province Key Lab. for Photoelectric Technology and Application, Guizhou University, Guiyang City 550025, China
| | - Guo Lu
- Guizhou Province Key Lab. for Photoelectric Technology and Application, Guizhou University, Guiyang City 550025, China
| | - Zhongchen Bai
- College of Medicine, Guizhou University, Guiyang City 550025, China
- Guizhou Province Key Lab. for Photoelectric Technology and Application, Guizhou University, Guiyang City 550025, China
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3
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Liu Y, Zhang B, Liu F, Qiu Y, Mu W, Chen L, Ma C, Ye T, Wang Y. Strontium doped electrospinning fiber membrane with antibacterial and osteogenic properties prepared by pulse electrochemical method. ENGINEERED REGENERATION 2022. [DOI: 10.1016/j.engreg.2022.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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4
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Wang X, Lu A, Bai Z, Xu T. A Multilayer Interlaced Ag Nanosheet Film Prepared by an Electrodeposition Method on a PPy@PEDOT:PSS Film: A Strategy to Prepare Sensitive Surface-Enhanced Raman Scattering Substrates. ACS OMEGA 2022; 7:9380-9387. [PMID: 35350326 PMCID: PMC8945060 DOI: 10.1021/acsomega.1c06387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 01/28/2022] [Indexed: 06/19/2023]
Abstract
A highly sensitive multilayer interlaced silver (Ag) nanosheet (MISN) film was prepared on a PPy@PEDOT:PSS film via an electrodeposition method for surface-enhanced Raman scattering (SERS) applications. After the PPy@PEDOT:PSS film was pretreated with ascorbic acid solution, many sparse Ag nanoparticles (NPs) could be directly reduced on the surface of the PPy@PEDOT:PSS film in AgNO3 solution. Then, the MISN film was directionally grown along the surface of sparse Ag NPs by using an electrochemical galvanostatic method to form a Ag/PPy@PEDOT:PSS film for a SERS substrate. The results indicated that with the increase in electrodeposition time, the density of Ag nanosheets was also increased for boosting the SERS effect. Accordingly, owing to the directional growth of Ag NPs, the increase in the length-width ratio of single Ag nanosheets would further promote the SERS signal of the substrate. Moreover, the maximum enhancement factor of the SERS substrate could reach to 12,478, and the minimum limit of detection of melamine solution was down to 5.42 ng/mL. The SERS sensitivity of the Ag nanosheet film reached 100.65. This method of preparing the SERS substrate provides a novel and robust strategy for the low-cost and high-sensitivity detection in biomedicine, drugs, and food.
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Affiliation(s)
- Xueqin Wang
- College
of Medicine, Guizhou University, Guiyang City 550025, China
- Guizhou
Province Key Laboratory for Photoelectronic Technology and Application, Guizhou University, Guiyang City 550025, China
| | - Anjiang Lu
- Guizhou
Province Key Laboratory for Photoelectronic Technology and Application, Guizhou University, Guiyang City 550025, China
| | - Zhongchen Bai
- College
of Medicine, Guizhou University, Guiyang City 550025, China
- Guizhou
Province Key Laboratory for Photoelectronic Technology and Application, Guizhou University, Guiyang City 550025, China
| | - Tianwen Xu
- College
of Medicine, Guizhou University, Guiyang City 550025, China
- Guizhou
Province Key Laboratory for Photoelectronic Technology and Application, Guizhou University, Guiyang City 550025, China
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5
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Orchestrating soft tissue integration at the transmucosal region of titanium implants. Acta Biomater 2021; 124:33-49. [PMID: 33444803 DOI: 10.1016/j.actbio.2021.01.001] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 01/03/2021] [Accepted: 01/05/2021] [Indexed: 12/20/2022]
Abstract
Osseointegration at the bone-implant interface and soft tissue integration (STI) at the trans-mucosal region are crucial for the long-term success of dental implants, especially in compromised patient conditions. The STI quality of conventional smooth and bio-inert titanium-based implants is inferior to that of natural tissue (i.e. teeth), and hence various surface modifications have been suggested. This review article compares and contrasts the various modification strategies (physical, chemical and biological) utilized to enhance STI of Ti implants. It also details the STI challenges associated with conventional Ti-based implants, current surface modification strategies and cutting-edge nano-engineering solutions. The topographical, biological and therapeutic advances achievable via electrochemically anodized Ti implants with TiO2 nanotubes/nanopores are highlighted. Finally, the status and future directions of such nano-engineered implants is discussed, with emphasis on bridging the gap between research and clinical translation.
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6
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Yang Y, Cheng Y, Deng F, Shen L, Zhao Z, Peng S, Shuai C. A bifunctional bone scaffold combines osteogenesis and antibacterial activity via in situ grown hydroxyapatite and silver nanoparticles. Biodes Manuf 2021. [DOI: 10.1007/s42242-021-00130-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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7
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Xu N, Fu J, Zhao L, Chu PK, Huo K. Biofunctional Elements Incorporated Nano/Microstructured Coatings on Titanium Implants with Enhanced Osteogenic and Antibacterial Performance. Adv Healthc Mater 2020; 9:e2000681. [PMID: 32875743 DOI: 10.1002/adhm.202000681] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 08/02/2020] [Indexed: 12/20/2022]
Abstract
Bone fracture is prevalent among athletes and senior citizens and may require surgical insertion of bone implants. Titanium (Ti) and its alloys are widely used in orthopedics due to its high corrosion resistance, good biocompatibility, and modulus compatible with natural bone tissues. However, bone repair and regrowth are impeded by the insufficient intrinsic osteogenetic capability of Ti and Ti alloys and potential bacterial infection. The physicochemical properties of the materials and nano/microstructures on the implant surface are crucial for clinical success and loading with biofunctional elements such as Sr, Zn, Cu, Si, and Ag into nano/microstructured TiO2 coating has been demonstrated to enhance bone repair/regeneration and bacterial resistance of Ti implants. In this review, recent advances in biofunctional element-incorporated nano/microstructured coatings on Ti and Ti alloy implants are described and the prospects and limitations are discussed.
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Affiliation(s)
- Na Xu
- The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430081, China
| | - Jijiang Fu
- The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430081, China
| | - Lingzhou Zhao
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases and Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China
| | - Paul K Chu
- Department of Physics, Department of Materials Science and Engineering and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Kaifu Huo
- The State Key Laboratory of Refractories and Metallurgy, Institute of Advanced Materials and Nanotechnology, College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, 430081, China
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
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8
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Gong Y, Zhang Y, Cao Z, Ye F, Lin Z, Li Y. Development of CaCO 3 microsphere-based composite hydrogel for dual delivery of growth factor and Ca to enhance bone regeneration. Biomater Sci 2020; 7:3614-3626. [PMID: 31210206 DOI: 10.1039/c9bm00463g] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Injectable scaffolds have attracted much attention because of their minimum surgical invasiveness. However, limited osteogenic induction property and low mechanical properties hampered their application in bone tissue engineering. CaCO3 microspheres, which possess osteoinductivity, rough surfaces and specific binding sites for BMP-2, were first fabricated; after BMP-2 uploading, microspheres were further entrapped in fibrin-glue hydrogel. CaCO3 microspheres were co-functionalized with casein and heparin. To obtain a high encapsulation of heparin and thus BMP-2 uploading, along with controlled release and simultaneous maintenance of the presence of vaterite which had osteogenic induction property, fabrication parameters were optimized and microspheres were characterized using XRD, FITR and SEM. The formed CaCO3 had a microsphere morphology of ∼1 μm. Both vaterite and calcite phases were present and the relative amount of calcite phase increased with the amount of heparin. Sample 25 mM_4-1Hep with the highest loading amount of heparin was selected as carrier for BMP-2 and BMP-2 loaded CaCO3 microspheres were further entrapped in fibrin-glue hydrogel (FC-B). For the as-prepared composite hydrogel, mechanical properties were characterized and the presence of CaCO3 significantly elevated the tensile strength; controlled release of BMP-2 was sustained until day 21. Based on ALP activity, alizarin red staining and RT-PCR, in vitro osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) was found to be significantly enhanced under induction of FC-B. Rabbit tibia bone defect model was applied to evaluate its in vivo performance. After implantation for 4 weeks, presence of composite hydrogel was observed in defects. After 8 weeks, bone defects of FC-B group were nearly completely healed. Using the fact that autologous scaffolds can be derived based on fibrin-glue hydrogel, the well-designed BMP-2 loaded fibrin-glue composite hydrogel demonstrated good potential in bone tissue engineering.
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Affiliation(s)
- Yihong Gong
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Sun Yat-sen University, Guangzhou, Guangdong, P.R. China.
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9
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Balavigneswaran CK, Venkatesan R, Karuppiah PS, Kumar G, Paliwal P, Krishnamurthy S, Kadalmani B, Mahto SK, Misra N. Silica Release from Silane Cross-Linked Gelatin Based Hybrid Scaffold Affects Cell Proliferation. ACS APPLIED BIO MATERIALS 2019; 3:197-207. [DOI: 10.1021/acsabm.9b00680] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Chelladurai Karthikeyan Balavigneswaran
- Tissue Engineering and Biomaterials Lab, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India
| | - Ramya Venkatesan
- Department of Animal Science, Bharathidasan University, Tiruchirappalli-620024, Tamil Nadu, India
| | - Prakash Shyam Karuppiah
- Research and Development Division, VVD and Sons Private Limited, Thoothukudi-621004, Tamil Nadu, India
| | | | | | | | - Balamuthu Kadalmani
- Department of Animal Science, Bharathidasan University, Tiruchirappalli-620024, Tamil Nadu, India
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10
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Liu F, Wang X, Chen T, Zhang N, Wei Q, Tian J, Wang Y, Ma C, Lu Y. Hydroxyapatite/silver electrospun fibers for anti-infection and osteoinduction. J Adv Res 2019; 21:91-102. [PMID: 32071777 PMCID: PMC7015467 DOI: 10.1016/j.jare.2019.10.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 09/19/2019] [Accepted: 10/06/2019] [Indexed: 11/28/2022] Open
Abstract
Bone implant materials cause the most common complication of bone infections in orthopedic surgery, resulting in implant failure. Antibiotic treatment of bone infections leads to problems such as bacterial resistance and reduced osteogenic capacity. In this study, dopamine (DA) was self-polymerized on the surface of Polylactic acid (PLLA)/Hydroxyapatite (HA) nanowire composite fibers to form an adhesive polydopamine (PDA) membrane, and a stable silver-nanoparticles (Ag-NPs) coating layer was constructed on it by electrochemically driven Ag+ coordination and chelation through Polypyrrole (PPy) mediation, achieving steady and slow release of Ag-NPs. With optimized DA soaking time of 24 h and soaking concentration of 0.5 g·L-1, nanoparticles were uniformly distributed on PLLA/HA/PDA/PPy/Ag composite fibers and the hydrophilicity of the composite fibers was well-behaved. Besides, the composite fibers possessed good physiological stability and 100% antibacterial rate against Escherichia coli (E. coli) as well as Staphylococcus aureus (S. aureus). In addition, the composite fibers had promoted apatite nucleation and growth on surface and good cytocompatibility with osteoblasts, indicating ability of inducing osteogenic differentiation. In summary, a multi-functional PLLA/HA/PDA/PPy/Ag composite fiber with long-term antibacterial property, bioactivity and osteoinductivity was successfully constructed by electrospinning and electrochemical deposition.
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Affiliation(s)
- Feifei Liu
- College of Chemical Engineering, Xinjiang Normal University, Urumqi 830054, Xinjiang, PR China
| | - Xiaohui Wang
- College of Chemical Engineering, Xinjiang Normal University, Urumqi 830054, Xinjiang, PR China
| | - Tongtong Chen
- Radiology Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, PR China
| | - Naiyin Zhang
- College of Life Information Science and Instrument Engineering, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou, Zhejiang 310018, PR China
| | - Qin Wei
- Animal Laboratory Center, Xinjiang Medical University, 393 Xinyi Road, Urumqi 830054, PR China
| | - Juling Tian
- Laboratory Department of the First People's Hospital of Urumqi, 1 Jiankang Road, Urumqi 830002, PR China
| | - Yingbo Wang
- College of Chemical Engineering, Xinjiang Normal University, Urumqi 830054, Xinjiang, PR China
| | - Chuang Ma
- Department of Orthopedics Center, the First Affiliated Hospital of Xinjiang Medical University, 393 Xinyi Road, Urumqi 830054, PR China
| | - Yong Lu
- Radiology Department, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai 200025, PR China
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11
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Affiliation(s)
- Xiang Ge
- Key Laboratory of Mechanism Theory and Equipment Design of Ministry of EducationSchool of Mechanical EngineeringTianjin UniversityTianjin300354People's Republic of China
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12
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Effect of incorporation of montmorillonite on Xylan/Chitosan conjugate scaffold. Colloids Surf B Biointerfaces 2019; 180:75-82. [DOI: 10.1016/j.colsurfb.2019.04.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 03/21/2019] [Accepted: 04/15/2019] [Indexed: 12/30/2022]
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13
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Huang TB, Li YZ, Yu K, Yu Z, Wang Y, Jiang ZW, Wang HM, Yang GL. Effect of the Wnt signal-RANKL/OPG axis on the enhanced osteogenic integration of a lithium incorporated surface. Biomater Sci 2019; 7:1101-1116. [PMID: 30633253 DOI: 10.1039/c8bm01411f] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Bone remolding involves the formation of new bone by osteoblasts and the absorption of old bones by osteoclasts. Due to the vital role of osteoblasts and osteoclasts during bone regeneration, it might be feasible to promote osseointegration around the titanium implants by stimulating osteoblasts and inhibiting osteoclasts by modifying the surfaces of the implants. Lithium is used in the treatment of psychiatric patients, and it may be associated with osteogenesis. In this study, lithium was incorporated with sandblasted, large-grit and acid-etched titanium implants via a hydrothermal treatment. In vitro, the nano-scale surface enhanced the adhesion and proliferation of bone marrow mesenchymal stem cells (BMSCs). Moreover, the SLA-Li surface displayed a negative effect on the process of osteoclastogenesis. Further mechanism analysis indicated that the canonical Wnt/β-catenin signaling pathway was activated according to the results of RT-PCR and western blotting. More importantly, the RANKL/OPG signaling axis was also involved in these effects on the SLA-Li surface. The experiments in vivo proved that the SLA-Li surface could induce the bone formation and osseointegration during the early osseointegration after the dental implant surgery. These results suggested that bone homeostasis could be manipulated by an SLA-Li surface, which implied that this new surface might serve as a promising material for clinical application in the future.
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Affiliation(s)
- Ting-Ben Huang
- Department of Implantology, Stomatology Hospital, School of Medicine, Zhejiang University, Yan'an Road, Hangzhou, P. R. China.
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14
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Yılmaz E, Çakıroğlu B, Gökçe A, Findik F, Gulsoy HO, Gulsoy N, Mutlu Ö, Özacar M. Novel hydroxyapatite/graphene oxide/collagen bioactive composite coating on Ti16Nb alloys by electrodeposition. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 101:292-305. [PMID: 31029323 DOI: 10.1016/j.msec.2019.03.078] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/13/2019] [Accepted: 03/22/2019] [Indexed: 01/21/2023]
Abstract
A novel implant coating material containing graphene oxide (GO) and collagen (COL), and hydroxyapatite (HA) was fabricated with the aid of tannic acid by electrodeposition. The surface of Ti16Nb alloy was subjected to anodic oxidation, and then HA-GO coating was applied to Ti16Nb surface by cathodic method. Then, COL was deposited on the surface of the HA-GO coating by the biomimetic method. HA, HA-GO, HA-GO-COL coatings on the surface of the Ti16Nb alloy have increased the corrosion resistance by the formation of a barrier layer on the surface. For HA-GO-COL coating, the highest corrosion resistance is obtained due to the compactness and homogeneity of the coating structure. The contact angle of the bare Ti16Nb is approximately 65°, while the contact angle of the coated samples is close to 0°. Herein, the increased surface wettability is important for cell adhesion. The surface roughness of the uncoated Ti16Nb alloy was between 1 and 3 μm, while the surface roughness of the coated surfaces was measured between 20 and 110 μm. The contact between the bone and the implant has been improved. Graphene oxide-containing coatings have improved the antibacterial properties compared to the GO-free coating using S. aureus. The hardness and elastic modulus of the coatings were measured by the nanoindentation test, and the addition of GO and collagen to the HA coating resulted in an increase in strength. The addition of GO to the HA coating reduced the viability of 3 T3 fibroblast cells, whereas the addition of collagen to HA-GO coat increased the cell adhesion and viability.
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Affiliation(s)
- Eren Yılmaz
- Sakarya University, Biomedical, Magnetic and Semiconductor Materials Application & Research Center (BIMAS-RC), 54187, Sakarya, Turkey
| | - Bekir Çakıroğlu
- Sakarya University, Biomedical, Magnetic and Semiconductor Materials Application & Research Center (BIMAS-RC), 54187, Sakarya, Turkey
| | - Azim Gökçe
- Sakarya Applied Sciences University, Faculty of Technology, Metallurgical and Materials Engineering Department, 54187, Sakarya, Turkey
| | - Fehim Findik
- Sakarya University, Biomedical, Magnetic and Semiconductor Materials Application & Research Center (BIMAS-RC), 54187, Sakarya, Turkey; Sakarya Applied Sciences University, Faculty of Technology, Metallurgical and Materials Engineering Department, 54187, Sakarya, Turkey.
| | - H Ozkan Gulsoy
- Marmara University, Faculty of Technology, Metallurgical and Materials Engineering Department, Goztepe, 34722 Istanbul, Turkey
| | - Nagihan Gulsoy
- Marmara University, Faculty of Art and Sciences, Department of Biology, 34722, Goztepe, Istanbul, Turkey
| | - Özal Mutlu
- Marmara University, Faculty of Art and Sciences, Department of Biology, 34722, Goztepe, Istanbul, Turkey
| | - Mahmut Özacar
- Sakarya University, Biomedical, Magnetic and Semiconductor Materials Application & Research Center (BIMAS-RC), 54187, Sakarya, Turkey; Sakarya University, Science & Arts Faculty, Department of Chemistry, 54187, Sakarya, Turkey
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Nanostructured magnetic Mg 2SiO 4-CoFe 2O 4 composite scaffold with multiple capabilities for bone tissue regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:83-95. [PMID: 30889758 DOI: 10.1016/j.msec.2019.01.096] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/18/2019] [Accepted: 01/22/2019] [Indexed: 01/05/2023]
Abstract
Multifunctional magnetic 3D scaffolds are recently of particular interest because of their applications in hyperthermia-based therapy and localized drug delivery beside of their basic properties to be applied in bone tissue regeneration. In the current study, a magnetic nanocomposite is designed and synthesized through a two-step synthesis strategy in which CoFe2O4 nanoparticles are prepared via sol-gel combustion method and then they are coated through sol-gel method with Mg2SiO4. The characterization relates to the nanocomposite shows that Mg2SiO4-CoFe2O4 is successfully synthesized and it has a core-shell structure. Then, 3D scaffolds are fabricated through polymer sponge technique from the nanocomposite. Physiochemical and biological properties of the scaffolds are assessed in vitro amongst which bioactivity, biodegradability, mechanical properties, hyperthermia capability, controlled release potential, antibacterial activity, cell compatibility and attachment can be mentioned. The results demonstrate that the scaffolds have high porous structure with interconnected porosity and desirable mechanical properties close to cancellous bone. The magnetic scaffold is biodegradable and bioactive and exhibits controlled release of rifampin as an antibiotic drug up to 96 h. Moreover, in the exposure of different magnetic fields it has potential to produce heat for different kinds of hyperthermia-based therapies. The antibacterial activity of drug-loaded scaffold is assessed against S. aureus bacteria. The results suggest that Mg2SiO4-CoFe2O4 nanocomposite scaffold with multiple capabilities has a great potential to be applied in the case of large bone defects which are caused by tumors to not only eradicate remained cancerous tissues, but also prevent infection after surgery and regenerate bone defect.
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