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Fiehn LA, Kunisch E, Saur M, Arango-Ospina M, Merle C, Hagmann S, Stiller A, Hupa L, Kaňková H, Galusková D, Renkawitz T, Boccaccini AR, Westhauser F. A comparative in vitro and in vivo analysis of the impact of copper substitution on the cytocompatibility, osteogenic, and angiogenic properties of a borosilicate bioactive glass. J Biomed Mater Res A 2024; 112:1740-1759. [PMID: 38623001 DOI: 10.1002/jbm.a.37721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 03/10/2024] [Accepted: 04/01/2024] [Indexed: 04/17/2024]
Abstract
The 0106-B1-bioactive glass (BG) composition (in wt %: 37.5 SiO2, 22.6 CaO, 5.9 Na2O, 4.0 P2O5, 12.0 K2O, 5.5 MgO, and 12.5 B2O3) has demonstrated favorable processing properties and promising bone regeneration potential. The present study aimed to evaluate the biological effects of the incorporation of highly pro-angiogenic copper (Cu) in 0106-B1-BG in vitro using human bone marrow-derived mesenchymal stromal cells (BMSCs) as well as its in vivo potential for bone regeneration. CuO was added to 0106-B1-BG in exchange for CaO, resulting in Cu-doped BG compositions containing 1.0, 2.5 and 5.0 wt % CuO (composition in wt %: 37.5 SiO2, 21.6/ 20.1/17.6 CaO, 5.9 Na2O, 4.0 P2O5, 12.0 K2O, 5.5 MgO, 12.5 B2O3, and 1.0/ 2.5/ 5.0 CuO). In vitro, the BGs' impact on the viability, proliferation, and growth patterns of BMSCs was evaluated. Analyses of protein secretion, matrix formation, and gene expression were used for the assessment of the BGs' influence on BMSCs regarding osteogenic differentiation and angiogenic stimulation. The presence of Cu improved cytocompatibility, osteogenic differentiation, and angiogenic response when compared with unmodified 0106-B1-BG in vitro. In vivo, a critical-size femoral defect in rats was filled with scaffolds made from BGs. Bone regeneration was evaluated by micro-computed tomography. Histological analysis was performed to assess bone maturation and angiogenesis. In vivo effects regarding defect closure, presence of osteoclastic cells or vascular structures in the defect were not significantly changed by the addition of Cu compared with undoped 0106-B1-BG scaffolds. Hence, while the in vitro properties of the 0106-B1-BG were significantly improved by the incorporation of Cu, further evaluation of the BG composition is necessary to transfer these effects to an in vivo setting.
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Affiliation(s)
- Linn Anna Fiehn
- Department of Orthopaedics, Heidelberg University Hospital, Heidelberg, Germany
| | - Elke Kunisch
- Department of Orthopaedics, Heidelberg University Hospital, Heidelberg, Germany
| | - Merve Saur
- Department of Orthopaedics, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Christian Merle
- Department of Orthopaedics, Heidelberg University Hospital, Heidelberg, Germany
| | - Sébastien Hagmann
- Department of Orthopaedics, Heidelberg University Hospital, Heidelberg, Germany
| | - Adrian Stiller
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Turku, Finland
| | - Leena Hupa
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Turku, Finland
| | - Hana Kaňková
- Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, Trenčín, Slovakia
| | - Dagmar Galusková
- Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, Trenčín, Slovakia
| | - Tobias Renkawitz
- Department of Orthopaedics, Heidelberg University Hospital, Heidelberg, Germany
| | - Aldo R Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Fabian Westhauser
- Department of Orthopaedics, Heidelberg University Hospital, Heidelberg, Germany
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2
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Zhang Z, Tang H, Du T, Yang D. The impact of copper on bone metabolism. J Orthop Translat 2024; 47:125-131. [PMID: 39021399 PMCID: PMC466973 DOI: 10.1016/j.jot.2024.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 04/08/2024] [Accepted: 06/13/2024] [Indexed: 07/20/2024] Open
Abstract
Copper is an essential trace element for the human body. Abnormalities in copper metabolism can lead to bone defects, mainly by directly affecting the viability of osteoblasts and osteoclasts and their bone remodeling function, or indirectly regulating bone metabolism by influencing enzyme activities as cofactors. Copper ions released from biological materials can affect osteoblasts and osteoclasts, either directly or indirectly by modulating the inflammatory response, oxidative stress, and rapamycin signaling. This review presents an overview of recent progress in the impact of copper on bone metabolism. Translational potential of this article: The impact of copper on bone metabolism can provide insights into clinical application of copper-containing supplements and biomaterials.
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Affiliation(s)
- Zihan Zhang
- Liaoning Provincial Key Laboratory of Oral Disease, Department of Endodontics, School and Hospital of Stomatology, China Medical University, Shenyang, 110002, China
| | - Huixue Tang
- Liaoning Provincial Key Laboratory of Oral Disease, Department of Endodontics, School and Hospital of Stomatology, China Medical University, Shenyang, 110002, China
| | - Tingting Du
- Liaoning Provincial Key Laboratory of Oral Disease, Department of Endodontics, School and Hospital of Stomatology, China Medical University, Shenyang, 110002, China
| | - Di Yang
- Liaoning Provincial Key Laboratory of Oral Disease, Department of Endodontics, School and Hospital of Stomatology, China Medical University, Shenyang, 110002, China
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Alaoui Selsouli Y, Rho HS, Eischen-Loges M, Galván-Chacón VP, Stähli C, Viecelli Y, Döbelin N, Bohner M, Tahmasebi Birgani Z, Habibović P. Optimization of a tunable process for rapid production of calcium phosphate microparticles using a droplet-based microfluidic platform. Front Bioeng Biotechnol 2024; 12:1352184. [PMID: 38600949 PMCID: PMC11004461 DOI: 10.3389/fbioe.2024.1352184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 03/08/2024] [Indexed: 04/12/2024] Open
Abstract
Calcium phosphate (CaP) biomaterials are amongst the most widely used synthetic bone graft substitutes, owing to their chemical similarities to the mineral part of bone matrix and off-the-shelf availability. However, their ability to regenerate bone in critical-sized bone defects has remained inferior to the gold standard autologous bone. Hence, there is a need for methods that can be employed to efficiently produce CaPs with different properties, enabling the screening and consequent fine-tuning of the properties of CaPs towards effective bone regeneration. To this end, we propose the use of droplet microfluidics for rapid production of a variety of CaP microparticles. Particularly, this study aims to optimize the steps of a droplet microfluidic-based production process, including droplet generation, in-droplet CaP synthesis, purification and sintering, in order to obtain a library of CaP microparticles with fine-tuned properties. The results showed that size-controlled, monodisperse water-in-oil microdroplets containing calcium- and phosphate-rich solutions can be produced using a flow-focusing droplet-generator microfluidic chip. We optimized synthesis protocols based on in-droplet mineralization to obtain a range of CaP microparticles without and with inorganic additives. This was achieved by adjusting synthesis parameters, such as precursor concentration, pH value, and aging time, and applying heat treatment. In addition, our results indicated that the synthesis and fabrication parameters of CaPs in this method can alter the microstructure and the degradation behavior of CaPs. Overall, the results highlight the potential of the droplet microfluidic platform for engineering CaP microparticle biomaterials with fine-tuned properties.
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Affiliation(s)
- Y. Alaoui Selsouli
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Netherlands
| | - H. S. Rho
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Netherlands
| | - M. Eischen-Loges
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Netherlands
| | - V. P. Galván-Chacón
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Netherlands
| | - C. Stähli
- RMS Foundation, Bettlach, Switzerland
| | | | | | - M. Bohner
- RMS Foundation, Bettlach, Switzerland
| | - Z. Tahmasebi Birgani
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Netherlands
| | - P. Habibović
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Netherlands
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Nikody M, Li J, Balmayor ER, Moroni L, Habibovic P. The addition of zinc ions to polymer-ceramic composites accelerated osteogenic differentiation of human mesenchymal stromal cells. BIOMATERIALS ADVANCES 2023; 149:213391. [PMID: 36990024 DOI: 10.1016/j.bioadv.2023.213391] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 02/28/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023]
Abstract
Critical-sized bone defects, caused by congenital disorders or trauma, are defects that will not heal spontaneously and require surgical intervention. Recent advances in biomaterial design for the treatment of such defects focus on improving their osteoinductive properties. Here, we propose a bioactive composite with high ceramic content composed of poly(ethyleneoxide terephthalate)/poly(butylene terephthalate) (1000PEOT70PBT30, PolyActive, PA) and 50 % beta-tricalcium phosphate (β-TCP) with the addition of zinc in a form of a coating on the TCP particles. Due to its essential role in bone homeostasis, we hypothesised that the addition of zinc to the polymer-ceramic composite will further enhance its osteogenic properties. β-TCP particles were immersed in a zinc solution with a concentration of 15 or 45 mM. The addition of zinc did not alter the β-TCP composition or the release of calcium or phosphate ions. 3D porous 1000PEOT70PBT30 - β-TCP scaffolds were additively manufactured by "3D fibre deposition" and their ability to support the osteogenic differentiation was assessed by culturing clinically relevant human mesenchymal stromal cells (hMSCs) on the scaffolds for 3, 7, 14 and 28 days. The expression of osteogenic gene markers was increased in the presence of both zinc concentrations. Remarkably, upregulation of osteocalcin (OCN), a late osteogenic marker, was observed after three days of culture. Furthermore, enhanced extracellular matrix (ECM) production and mineralization was observed. These findings support the existing evidence on the osteogenic properties of zinc and further demonstrate that the incorporation of zinc into a polymer-ceramic composite could be a promising strategy in the field of regeneration of critical-sized bone defects.
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Affiliation(s)
- Martyna Nikody
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, the Netherlands; Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, the Netherlands.
| | - Jiaping Li
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, the Netherlands; Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, the Netherlands
| | - Elizabeth Rosado Balmayor
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, the Netherlands; Experimental Orthopaedics and Trauma Surgery, Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH Aachen University Hospital, Aachen, Germany
| | - Lorenzo Moroni
- Department of Complex Tissue Regeneration, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, the Netherlands.
| | - Pamela Habibovic
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, the Netherlands.
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Hameed HA, Hasan HA, Luddin N, Husein A, Ariffin A, Alam MK. Osteoblastic Cell Responses of Copper Nanoparticle Coatings on Ti-6Al-7Nb Alloy Using Electrophoretic Deposition Method. BIOMED RESEARCH INTERNATIONAL 2022; 2022:3675703. [PMID: 35496039 PMCID: PMC9042614 DOI: 10.1155/2022/3675703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 01/30/2022] [Accepted: 04/01/2022] [Indexed: 11/17/2022]
Abstract
Aim To investigate and compare the cell cytotoxicity, proliferation, cell attachment, and morphology of human fetal osteoblasts (hFOB) cells of coated samples (titanium nanocopper (Ti Cu), titanium nanohydroxyapatite (Ti HA) and titanium nanocopper ion doped hydroxyapatite (Ti Cu/HA) and uncoated samples (Ti) in order to assess the suitability of these surface modifications on Ti-6Al-7Nb for dental implant application. Materials and Methods The cytotoxicity was studied by examining the hFOB cell response by MTT assessment. The cell morphology was evaluated by inverted microscopy and observed under scanning electronic microscopy (SEM). Results MTT assay results displayed that the Cu content on the surface of Ti-6Al-7Nb alloys did not produce any cytotoxic effect on cell viability. The cell viability rate in all samples ranges from 97% to 126%, indicating that hFOB cells grew at a high proliferation rate. However, no significant differences in cell viability were observed between Ti and Ti Cu and between Ti HA and Ti Cu/HA groups. Microscopic examination demonstrated no difference in the cell morphology of hFOB among all samples. In addition, SEM observation indicated favorable adhesion and spreading of the cells on the coated and uncoated samples. Conclusions The surface modification of Ti-6Al-7Nb alloy with Cu, HA, and Cu/HA exhibits good cell biocompatibility, and the Cu has no influence on the cell proliferation and differentiation of hFOB.
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Affiliation(s)
- Hanan Ali Hameed
- Prosthdontic Department, College of Dentistry, University of Babylon, Iraq
| | - Haider Ali Hasan
- Oral and Maxillofacial Surgery Department, College of Dentistry, University of Babylon, Iraq
| | - Norhayati Luddin
- Prosthodontic Unit, School of Dental Sciences, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
| | - Adam Husein
- Prosthodontic Unit, School of Dental Sciences, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
| | - Azirrawani Ariffin
- Prosthodontic Unit, School of Dental Sciences, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
| | - Mohammad Khursheed Alam
- Department of Preventive Dental Science, College of Dentistry, Jouf University, Sakaka, Aljouf, Saudi Arabia
- Center for Transdisciplinary Research (CFTR), Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
- Department of Public Health, Faculty of Allied Health Sciences, Daffodil International University, Dhaka, Bangladesh
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Wu Y, Zhou H, Zeng Y, Xie H, Ma D, Wang Z, Liang H. Recent Advances in Copper-Doped Titanium Implants. MATERIALS (BASEL, SWITZERLAND) 2022; 15:2342. [PMID: 35407675 PMCID: PMC8999642 DOI: 10.3390/ma15072342] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 03/11/2022] [Accepted: 03/18/2022] [Indexed: 01/27/2023]
Abstract
Titanium (Ti) and its alloys have been extensively used as implant materials in clinical practice due to their high corrosion resistance, light weight and excellent biocompatibility. However, the insufficient intrinsic osteogenic capacity of Ti and its alloys impedes bone repair and regeneration, and implant-related infection or inflammation remains the leading cause of implant failure. Bacterial infections or inflammatory diseases constitute severe threats to human health. The physicochemical properties of the material are critical to the success of clinical procedures, and the doping of Cu into Ti implants has been confirmed to be capable of enhancing the bone repair/regeneration, angiogenesis and antibacterial capability. This review outlines the recent advances in the design and preparation of Cu-doped Ti and Ti alloy implants, with a special focus on various methods, including plasma immersion implantation, magnetron sputtering, galvanic deposition, microarc oxidation and sol-gel synthesis. More importantly, the antibacterial and mechanical properties as well as the corrosion resistance and biocompatibility of Cu-doped Ti implants from different methods are systematically reviewed, and their prospects and limitations are also discussed.
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Affiliation(s)
| | | | | | | | | | - Zhoucheng Wang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; (Y.W.); (H.Z.); (Y.Z.); (H.X.); (D.M.)
| | - Hanfeng Liang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; (Y.W.); (H.Z.); (Y.Z.); (H.X.); (D.M.)
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7
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Qiao W, Pan D, Zheng Y, Wu S, Liu X, Chen Z, Wan M, Feng S, Cheung KMC, Yeung KWK, Cao X. Divalent metal cations stimulate skeleton interoception for new bone formation in mouse injury models. Nat Commun 2022; 13:535. [PMID: 35087048 PMCID: PMC8795158 DOI: 10.1038/s41467-022-28203-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 01/14/2022] [Indexed: 12/14/2022] Open
Abstract
Bone formation induced by divalent metal cations has been widely reported; however, the underlying mechanism is unclear. Here we report that these cations stimulate skeleton interoception by promoting prostaglandin E2 secretion from macrophages. This immune response is accompanied by the sprouting and arborization of calcitonin gene-related polypeptide-α+ nerve fibers, which sense the inflammatory cue with PGE2 receptor 4 and convey the interoceptive signals to the central nervous system. Activating skeleton interoception downregulates sympathetic tone for new bone formation. Moreover, either macrophage depletion or knockout of cyclooxygenase-2 in the macrophage abolishes divalent cation-induced skeleton interoception. Furthermore, sensory denervation or knockout of EP4 in the sensory nerves eliminates the osteogenic effects of divalent cations. Thus, our study reveals that divalent cations promote bone formation through the skeleton interoceptive circuit, a finding which could prompt the development of novel biomaterials to elicit the therapeutic power of these divalent cations. Mechanisms underlying bone formation induced by divalent metal cations remain largely unknown. Here the authors show that these cations can activate the skeleton interoceptive circuit through the immune-neural axis to initiate new bone formation.
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Affiliation(s)
- Wei Qiao
- Department of Orthopaedics and Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R, People's Republic of China.,Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma, The University of Hong Kong-Shenzhen Hospital, Shenzhen, 518053, People's Republic of China.,Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong S.A.R, People's Republic of China
| | - Dayu Pan
- Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Orthopaedics, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, 300052, People's Republic of China
| | - Yufeng Zheng
- State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, People's Republic of China
| | - Shuilin Wu
- School of Materials Science & Engineering, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Xuanyong Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China.,Cixi Center of Biomaterials Surface Engineering, Ningbo, 315300, People's Republic of China
| | - Zhuofan Chen
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510000, People's Republic of China
| | - Mei Wan
- Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Shiqin Feng
- Department of Orthopaedics, Tianjin Medical University General Hospital, 154 Anshan Road, Heping District, Tianjin, 300052, People's Republic of China
| | - Kenneth M C Cheung
- Department of Orthopaedics and Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R, People's Republic of China.,Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma, The University of Hong Kong-Shenzhen Hospital, Shenzhen, 518053, People's Republic of China
| | - Kelvin W K Yeung
- Department of Orthopaedics and Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R, People's Republic of China. .,Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma, The University of Hong Kong-Shenzhen Hospital, Shenzhen, 518053, People's Republic of China.
| | - Xu Cao
- Department of Orthopaedic Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
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Montazeri M, Esfahanizadeh N, Nourani M, Harandi M. Use of bioactive glass doped with magnesium or strontium for bone regeneration: A rabbit critical-size calvarial defects study. Dent Res J (Isfahan) 2022; 19:18. [PMID: 35308452 PMCID: PMC8927959 DOI: 10.4103/1735-3327.338781] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/08/2021] [Accepted: 09/30/2021] [Indexed: 11/04/2022] Open
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Zn-Doped CaP-Based Coatings on Ti–6Al–4V and Ti–6Al–7Nb Alloys Prepared by Magnetron Sputtering: Controllable Biodegradation, Bacteriostatic, and Osteogenic Activities. COATINGS 2021. [DOI: 10.3390/coatings11070809] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
New TiNb-based alloys, such as Ti–6Al–7Nb, are currently being studied around the world as an alternative to other Ti alloys, e.g., instead of Ti–6Al–4V. We conducted a pilot study where thin (approximately 1.2 micron) CaP coatings containing low doses of Zn2+ (0.4–0.8 wt.%) were prepared by the radio frequency magnetron sputtering (RFMS) of Zn-hydroxyapatite (HA) target on Ti–6Al–4V and Ti–6Al–7Nb substrates and investigated their physicochemical properties, in vitro solubility, cytotoxicity, and antibacterial and osteogenic activities. The thickness of the obtained coatings was approximately 1.2–1.3 microns. Zn substitution did not result in roughness or structural or surface changes in the amorphous CaP coatings. The distributions of Ca, P, and Zn were homogeneous across the film thickness as shown by the EDX mapping of these elements. Zn doping of CaP coatings on both types of Ti-based alloys statistically influenced the results of the scratch-test. However, obtained values are satisfactory to use Zn-CaP coatings on biomedical implants. Increased Zn2+ release vs. tapered output of Ca and phosphate ions occurred during 5 weeks of an in vitro immersion test in 0.9% NaCl solution. Ti–6Al–7Nb alloy, unlike Ti–6Al–4V, promoted more linear biodegradation of CaP coatings in vitro. As a result, CaP-based surfaces on Ti–6Al–7Nb, compared with on Ti–6Al–4V alloy, augmented the total areas of Alizarin red staining in a 21-day culture of human adipose-derived mesenchymal stem cells in a statistically significant manner. Moreover, Zn–CaP coatings statistically reduced leukemic Jurkat T cell survival within 48 h of in vitro culture. Along with the higher solubility of the Zn–CaP surface, a greater reduction (4- to 5.5-fold) in Staphylococcus aureus growth was observed in vitro when 7-day extracts of the coatings were added into the microbial culture. Hence, Zn–CaP-coated Ti–6Al–7Nb alloy with controllable biodegradation as prepared by RFMS is a prospective material suitable for bone applications in cases where there is a risk of bacterial contamination with severe consequences, for example, in leukemic patients. Further research is needed to closely investigate the mechanical features and pathways of their solubility and antimicrobial, antitumor, and osteogenic activities.
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Husch JFA, Stessuk T, den Breejen C, van den Boom M, Leeuwenburgh SCG, van den Beucken JJJP. A Practical Procedure for the In Vitro Generation of Human Osteoclasts and Their Characterization. Tissue Eng Part C Methods 2021; 27:421-432. [PMID: 34162266 DOI: 10.1089/ten.tec.2021.0122] [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] [Indexed: 02/02/2023] Open
Abstract
Osteoclasts are multinucleated cells derived from the hematopoietic monocyte/macrophage lineage that possess the unique capacity to resorb bone. Due to the crucial role of osteoclasts in maintaining bone homeostasis and pathologies, this cell type is pivotal in multiple research areas dedicated to bone physiology in health and disease. Although numerous methods for generation of human osteoclasts are already available, those rely either on cell labeling-based purification or an intermediate adhesion step after which cells are directly differentiated toward osteoclasts. While the former requires additional reagents and equipment, the latter harbors the risk of variable osteoclast formation due to varying numbers of osteoclast precursors available for different donors. In this study, we report a facile and reliable three-step method for the generation of human osteoclasts from blood-derived precursor cells. Monocytes were obtained after adhering peripheral blood-derived mononuclear cells to plastic substrates followed by macrophage induction and proliferation resulting in a homogeneous population of osteoclast precursors. Finally, macrophages were seeded into suitable culture vessels and differentiated toward osteoclasts. Osteoclastogenesis was monitored longitudinally using nondestructive techniques, while the functionality of mature osteoclasts was confirmed after 14 days of culture by analysis of functional (e.g., elevated tartrate-resistant acid phosphatase [TRAP]-activity, resorption) and morphological (e.g., presence of TRAP, actin ring, and integrin β3) characteristics. Furthermore, we propose to use combinatory staining of three morphological osteoclast markers, rather than previously reported staining of a single or maximal two markers, to clearly distinguish osteoclasts from undifferentiated mononuclear cells. Impact statement Research related to bone biology requires a standardized and reliable method for in vitro generation of human osteoclasts. We here describe such a procedure which avoids shortcomings of previously published protocols. Further, we report on nondestructive methods to qualitatively and quantitatively monitor osteoclastogenesis longitudinally, and on analysis of osteoclast generation and functionality after 14 days. Specifically, we recommend assessment of morphological human osteoclast characteristics using combinatory staining of three markers to confirm successful osteoclast generation.
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Affiliation(s)
- Johanna F A Husch
- Department of Dentistry-Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Talita Stessuk
- Department of Dentistry-Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Cèzanne den Breejen
- Department of Dentistry-Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Manouk van den Boom
- Department of Dentistry-Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Sander C G Leeuwenburgh
- Department of Dentistry-Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Jeroen J J P van den Beucken
- Department of Dentistry-Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
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11
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Wang Y, Zhang W, Yao Q. Copper-based biomaterials for bone and cartilage tissue engineering. J Orthop Translat 2021; 29:60-71. [PMID: 34094859 PMCID: PMC8164005 DOI: 10.1016/j.jot.2021.03.003] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 02/25/2021] [Accepted: 03/01/2021] [Indexed: 02/07/2023] Open
Abstract
Backgroud Tissue engineering using cells, scaffolds, and bioactive molecules can promote the repair and regeneration of injured tissues. Copper is an essential element for the human body that is involved in many physiological activities and in recent years, copper has been used increasingly in tissue engineering. Methods The current advances of copper-based biomaterial for bone and cartilage tissue engineering were searched on PubMed and Web of Science. Results Various forms of copper-based biomaterials, including pure copper, copper ions, copper nanoparticles, copper oxides, and copper alloy are introduced. The incorporation of copper into base materials provides unique properties, resulting in tuneable porosity, mechanical strength, degradation, and crosslinking of scaffolds. Copper also shows promising biological performance in cell migration, cell adhesion, osteogenesis, chondrogenesis, angiogenesis, and antibacterial activities. In vivo applications of copper for bone and cartilage tissue engineering are discussed. Conclusion This review focuses on copper’s physiochemical and biological effects, and its applications in bone and cartilage tissue engineering. The potential limitations and future perspectives are also discussed. Translational potential of this article This review introduces the recent advances in copper-based biomaterial for bone and cartilage tissue engineering. This revie could guide researchers to apply copper in biomaterials, improving the generation of bone and cartilages, decrease the possibility of infection and shorten the recovery time so as to decrease medical costs.
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Affiliation(s)
- Yufeng Wang
- Department of Orthopaedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, China.,School of Medicine, Southeast University, Nanjing, 210009, China
| | - Wei Zhang
- School of Medicine, Southeast University, Nanjing, 210009, China.,China Orthopedic Regenerative Medicine Group (CORMed), China
| | - Qingqiang Yao
- Department of Orthopaedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, China.,China Orthopedic Regenerative Medicine Group (CORMed), China
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12
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Chen S, Wang Q, Eltit F, Guo Y, Cox M, Wang R. An Ammonia-Induced Calcium Phosphate Nanostructure: A Potential Assay for Studying Osteoporosis and Bone Metastasis. ACS APPLIED MATERIALS & INTERFACES 2021; 13:17207-17219. [PMID: 33845570 DOI: 10.1021/acsami.1c00495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Osteoclastic resorption of bones plays a central role in both osteoporosis and bone metastasis. A reliable in vitro assay that simulates osteoclastic resorption in vivo would significantly speed up the process of developing effective therapeutic solutions for those diseases. Here, we reported the development of a novel and robust nanostructured calcium phosphate coating with unique functions on the track-etched porous membrane by using an ammonia-induced mineralization (AiM) technique. The calcium phosphate coating uniformly covers one side of the PET membrane, enabling testing for osteoclastic resorption. The track-etched pores in the PET membrane allow calcium phosphate mineral pins to grow inside, which, on the one hand, enhances coating integration with a membrane substrate and, on the other hand, provides diffusion channels for delivering drugs from the lower chamber of a double-chamber cell culture system. The applications of the processed calcium phosphate coating were first demonstrated as a drug screening device by using alendronate, a widely used drug for osteoporosis. It was confirmed that the delivery of alendronate significantly decreased both the number of monocyte-differentiated osteoclasts and coating resorption. To demonstrate the application in studying bone metastasis, we delivered a PC3 prostate cancer-conditioned medium and confirmed that both the differentiation of monocytes into osteoclasts and the osteoclastic resorption of the calcium phosphate coating were significantly enhanced. This novel assay thus provides a new platform for studying osteoclastic activities and assessing drug efficacy in vitro.
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Affiliation(s)
- Sijia Chen
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Qiong Wang
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Felipe Eltit
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Yubin Guo
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Michael Cox
- Vancouver Prostate Centre, University of British Columbia, Vancouver, BC V6H 3Z6, Canada
| | - Rizhi Wang
- Department of Materials Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
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Yoo KH, Kim YI, Yoon SY. Physicochemical and Biological Properties of Mg-Doped Calcium Silicate Endodontic Cement. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1843. [PMID: 33917786 PMCID: PMC8068188 DOI: 10.3390/ma14081843] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/01/2021] [Accepted: 04/01/2021] [Indexed: 12/31/2022]
Abstract
Calcium silicate-based cement has been widely used for endodontic repair. However, it has a long setting time and needs to shorten setting time. This study investigated the effects of magnesium (Mg) ion on the setting reaction, mechanical properties, and biological properties of calcium silicate cement (CSC). Sol-gel route was used to synthesize Mg ion-doped calcium silicate cement. Synthesized cement was formulated with the addition of different contents of Mg ion, according to 0, 1, 3, 5 mol% of Mg ion-doped calcium silicate. The synthesized cements were characterized with X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). We also evaluated the physicochemical and biological properties of cement, such as the setting time, compressive strength, micro-hardness, simulated body fluid (SBF) immersion, cytotoxicity, and cell differentiation tests. As a result, the Mg ion improves the hydration properties of calcium silicate cement, and the setting time is reduced by increasing the amounts of Mg ion. However, the mechanical properties deteriorated with increasing Mg ion, and 1 and 3 mol% Mg-doped calcium silicate had appropriate mechanical properties. Also, the results of biological properties such as cytotoxicity, ALP activity, and ARS staining improved with Mg ion. Consequently, the optimal condition is 3 mol% of Mg ion-doped calcium silicate (3%Mg-CSC).
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Affiliation(s)
- Kyung-Hyeon Yoo
- School of Materials Science and Engineering, Pusan National University, Busan 46241, Korea;
| | - Yong-Il Kim
- Department of Orthodontics, Dental Research Institute, Pusan National University, Yangsan 50612, Korea
| | - Seog-Young Yoon
- School of Materials Science and Engineering, Pusan National University, Busan 46241, Korea;
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de Melo Pereira D, Schumacher M, Habibovic P. Cobalt-containing calcium phosphate induces resorption of biomineralized collagen by human osteoclasts. Biomater Res 2021; 25:6. [PMID: 33743840 PMCID: PMC7981861 DOI: 10.1186/s40824-021-00209-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/10/2021] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Biomineralized collagen, consisting of fibrillar type-I collagen with embedded hydroxyapatite mineral, is a bone-mimicking material with potential application as a bone graft substitute. Despite the chemical and structural similarity with bone extracellular matrix, no evidence exists so far that biomineralized collagen can be resorbed by osteoclasts. The aim of the current study was to induce resorption of biomineralized collagen by osteoclasts by a two-fold modification: increasing the calcium phosphate content and introducing cobalt ions (Co2+), which have been previously shown to stimulate resorptive activity of osteoclasts. METHODS To this end, we produced biomineralized collagen membranes and coated them with a cobalt-containing calcium phosphate (CoCaP). Human osteoclasts, derived from CD14+ monocytes from peripheral blood, were differentiated directly on the membranes. Upon fluorescent staining of nuclei, F-actin and tartrate-resistant alkaline phosphatase, the cells were analyzed by laser confocal microscopy. Their resorption capacity was assessed by scanning electron microscopy (SEM), as well as indirectly quantified by measuring the release of calcium ions into cell culture medium. RESULTS The CoCaP coating increased the mineral content of the membranes by 4 wt.% and their elastic modulus from 1 to 10 MPa. The coated membranes showed a sustained Co2+ release in water of about 7 nM per 2 days. In contrast to uncoated membranes, on CoCaP-coated biomineralized collagen membranes, osteoclasts sporadically formed actin rings, and induced formation of resorption lacunae, as observed by SEM and confirmed by increase in Ca2+ concentration in cell culture medium. The effect of the CoCaP layer on osteoclast function is thought to be mainly caused by the increase of membrane stiffness, although the effect of Co2+, which was released in very low amounts, cannot be fully excluded. CONCLUSIONS This work shows the potential of this relatively simple approach to induce osteoclast resorption of biomineralized collagen, although the extent of osteoclast resorption was limited, and the method needs further optimization. Moreover, the coating method is suitable for incorporating bioactive ions of interest into biomineralized collagen, which is typically not possible using the common biomineralization methods, such as polymer-induced liquid precursor method.
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Affiliation(s)
- Daniel de Melo Pereira
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Netherlands
| | - Matthias Schumacher
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Netherlands
| | - Pamela Habibovic
- Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Netherlands.
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15
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Chen ZY, Gao S, Zhang YW, Zhou RB, Zhou F. Antibacterial biomaterials in bone tissue engineering. J Mater Chem B 2021; 9:2594-2612. [PMID: 33666632 DOI: 10.1039/d0tb02983a] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bone infection is a devastating disease characterized by recurrence, drug-resistance, and high morbidity, that has prompted clinicians and scientists to develop novel approaches to combat it. Currently, although numerous biomaterials that possess excellent biocompatibility, biodegradability, porosity, and mechanical strength have been developed, their lack of effective antibacterial ability substantially limits bone-defect treatment efficacy. There is, accordingly, a pressing need to design antibacterial biomaterials for effective bone-infection prevention and treatment. This review focuses on antibacterial biomaterials and strategies; it presents recently reported biomaterials, including antibacterial implants, antibacterial scaffolds, antibacterial hydrogels, and antibacterial bone cement types, and aims to provide an overview of these antibacterial materials for application in biomedicine. The antibacterial mechanisms of these materials are discussed as well.
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Affiliation(s)
- Zheng-Yang Chen
- Orthopedic Department, Peking University Third Hospital, Beijing 100191, China.
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Influence of Cu 2+ on Osteoclast Formation and Activity In Vitro. Int J Mol Sci 2021; 22:ijms22052451. [PMID: 33671069 PMCID: PMC7957576 DOI: 10.3390/ijms22052451] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/24/2021] [Accepted: 02/25/2021] [Indexed: 01/28/2023] Open
Abstract
Background: Copper-containing biomaterials are increasingly applied for bone regeneration due to their pro-angiogenetic, pro-osteogenetic and antimicrobial properties. Therefore, the effect of Cu2+ on osteoclasts, which play a major role in bone remodeling was studied in detail. Methods: Human primary osteoclasts, differentiated from human monocytes were differentiated or cultivated in the presence of Cu2+. Osteoclast formation and activity were analyzed by measurement of osteoclast-specific enzyme activities, gene expression analysis and resorption assays. Furthermore, the glutathione levels of the cells were checked to evaluate oxidative stress induced by Cu2+. Results: Up to 8 µM Cu2+ did not induce cytotoxic effects. Activity of tartrate-resistant acid phosphatase (TRAP) was significantly increased, while other osteoclast specific enzyme activities were not affected. However, gene expression of TRAP was not upregulated. Resorptive activity of osteoclasts towards dentin was not changed in the presence of 8 µM Cu2+ but decreased in the presence of extracellular bone matrix. When Cu2+ was added to mature osteoclasts TRAP activity was not increased and resorption decreased only moderately. The glutathione level of both differentiating and mature osteoclasts was significantly decreased in the presence of Cu2+. Conclusions: Differentiating and mature osteoclasts react differently to Cu2+. High TRAP activities are not necessarily related to high resorption.
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Chen L, Wang D, Qiu J, Zhang X, Liu X, Qiao Y, Liu X. Synergistic effects of immunoregulation and osteoinduction of ds-block elements on titanium surface. Bioact Mater 2021; 6:191-207. [PMID: 32913928 PMCID: PMC7452063 DOI: 10.1016/j.bioactmat.2020.08.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/01/2020] [Accepted: 08/01/2020] [Indexed: 12/18/2022] Open
Abstract
Ds-block elements have been gaining increasing attention in the field of biomaterials modification, owing to their excellent biological properties, such as antibiosis, osteogenesis, etc. However, their function mechanisms are not well understood and conflicting conclusions were drawn by previous studies on this issue, which are mainly resulted from the inconsistent experimental conditions. In this work, three most widely used ds-block elements, copper, zinc, and silver were introduced on titanium substrate by plasma immersion ion implantation method to investigate the rule of ds-block elements in the immune responses. Results showed that the implanted samples could decrease the inflammatory responses compared with Ti sample. The trend of anti-inflammatory effects of macrophages on samples was in correlation with cellular ROS levels, which was induced by the implanted biomaterials and positively correlated with the number of valence electrons of ds-block elements. The co-culture experiments of macrophages and bone marrow mesenchymal stem cells showed that these two kinds of cells could enhance the anti-inflammation and osteogenesis of samples by the paracrine manner of PGE2. In general, in their steady states on titanium substrate (Cu2+, Zn2+, Ag), the ds-block elements with more valence electrons exhibit better anti-inflammatory and osteogenic effects. Moreover, molecular biology experiments indicate that the PGE2-related signaling pathway may contribute to the desired immunoregulation and osteoinduction capability of ds-block elements. These findings suggest a correlation between the number of valence electrons of ds-block elements and the relevant biological responses, which provides new insight into the selection of implanted ions and surface design of biomaterials.
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Affiliation(s)
- Lan Chen
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Donghui Wang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China
| | - Jiajun Qiu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Xianming Zhang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Xingdan Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuqin Qiao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Xuanyong Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
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Tripathy S, Jali P, Parida C, Pradhan C. Study on biodegradability and thermal behaviour of composites using poly lactic acid and gamma-irradiated fibres of Luffa cylindrica. CHEMOSPHERE 2020; 261:127684. [PMID: 32721687 DOI: 10.1016/j.chemosphere.2020.127684] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 07/08/2020] [Accepted: 07/10/2020] [Indexed: 06/11/2023]
Abstract
Surface modification of natural fibres by gamma irradiation is an economical and potent technique. The biodegradability of gamma irradiated Luffa cylindrica (LC) fibres having response of doses (0.5Gy, 1Gy and 2Gy) is studied. The degradation process is carried out in various environments like compost, sand, soil, salt water, brackish water and sweet water for a period of 90 days and microbial degradation using bacteria and fungi for a period of 90 days. The rate of biodegradation was calculated by measuring the loss of weight of composites at an interval of 30 days in each environmental condition. Preliminary results reported that the bacterial environment was the most prominent medium for degradation than fungi. B8 composites showed degradation of 27.5% and 3.59 in bacterial and fungal medium respectively. A minimum degradation was observed in compost medium (0.29%, 2.52%, 0.21%, 0.08%, 0.11%, 0.13%, 0.17%, 1.25% and 1.51% for B1-B9 respectively). For exploring the use of the composites in the field of biomedical sciences, the LC fibres are modified using calcium salts before reinforcement. The thermal properties like crystallization temperature (Tcc), glass transition temperature (Tg), melting peak temperature (Tm) and thermal stability of the bio-composites were analyzed using Differential scanning calorimetry (DSC) in temperature range from 30 °C to 250 °C and the thermogravimetric analysis (TGA) was done in the temperature range of 20 °C to 700 °C. With increase in irradiation dose, crystallization temperature and glass transition temperature increased. Increasing in the irradiation dose, thermal stability of the composites decreased.
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Affiliation(s)
| | - Pallavi Jali
- Department of Botany, Utkal University, Bhubaneswar, Odisha, India
| | - Chhatrapati Parida
- Department of Physics, College of Basic Sciences and Humanities, OUAT, Bhubaneswar, Odisha, India
| | - Chinmay Pradhan
- Department of Botany, Utkal University, Bhubaneswar, Odisha, India.
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Sivaraj D, Vijayalakshmi K, Ganeshkumar A, Rajaram R. Tailoring Cu substituted hydroxyapatite/functionalized multiwalled carbon nanotube composite coating on 316L SS implant for enhanced corrosion resistance, antibacterial and bioactive properties. Int J Pharm 2020; 590:119946. [PMID: 33027634 DOI: 10.1016/j.ijpharm.2020.119946] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/30/2020] [Accepted: 10/01/2020] [Indexed: 01/11/2023]
Abstract
The aim of the present work is to study the potential change in the antibacterial properties of Cu-hydroxyapatite/functionalized multiwall carbon nanotube (HA/f-MWCNT) composite coated heterogeneous implant surfaces against Gram positive and Gram-negative microorganism and to reveal the possible contribution of surface corrosion effects arising in stimulated body fluid. Novel spray pyrolysis instrument designed with double nozzle was used for the fabrication of Cu-hydroxyapatite/f-MWCNT film on 316L stainless steel (SS). The Cu-hydroxyapatite/MWCNT coated bioimplant was characterized by a series of techniques to identify the crystallinity, chemical bonds, surface morphology and elemental composition. The results disclose that the coated implants exhibit highly crystalline nature with the space group of P63mc and spherical shaped morphology. The corrosion current density revealed a remarkable decrease from 6.8 to 3.8 μA suggesting that the Cu substituted hydroxyapatite/f-MWCNT composite coating provided higher barrier properties which is beneficial to achieve higher corrosion protection of 316L SS implant. The hybrid Cu-hydroxyapatite-MWCNT composite revealed better antibacterial ability than HA/MWCNT for both gram positive and gram-negative bacteria with a maximum inhibition zone of 13-17 mm, compared with hydroxyapatite/f-MWCNT. The antibacterial ability of the Cu-hydroxyapatite/f-MWCNT nanocomposites was effective against Escherichia coli compared with other microorganisms. The Cu-hydroxyapatite/f-MWCNT nanocomposite exhibited that the coated material is nontoxic, biocompatible and suitable for biomedical application.
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Affiliation(s)
- Durairaj Sivaraj
- Research Department of Physics, Bishop Heber College, Tiruchirappalli, Tamil Nadu, India; SSN Research Centre, SSN College of Engineering, Kalavakkam, Chennai, Tamilnadu 603 110, India.
| | | | - Arumugam Ganeshkumar
- DNA Barcoding and Marine Genomics Laboratory, Department of Marine Science, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India
| | - Rajendran Rajaram
- DNA Barcoding and Marine Genomics Laboratory, Department of Marine Science, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India
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Li Z, Liu H, Wang R, Ji C, Wei Y, Shi M, Wang Y, Du Y, Zhang Y, Yuan Q, Yan C. Bioactive Core-Shell CaF 2 Upconversion Nanostructure for Promotion and Visualization of Engineered Bone Reconstruction. ACS NANO 2020; 14:16085-16095. [PMID: 33151671 DOI: 10.1021/acsnano.0c08013] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Inorganic ion metabolism plays significant roles in various life processes including signal transduction, substance exchange, and cellular constructions. Regulation and monitoring of ion metabolism offer great promise to modulate biological activities and provide insights into related mechanisms. Here, a synergistic nanodepot based on a bioactive core-shell CaF2 upconversion nanostructure that integrates multiple mineral ions for metabolic regulation was built for the acceleration and monitoring of the biomineralization process. Multiple mineral ions released from the nanodepots can accelerate the growth of inorganic crystals and enhance the production of organic matrixes, synergistically facilitating the regeneration of bone defects in vivo. During the process, such a nanodepot can be constructed to specifically recognize osteoblasts for the monitoring of biomineralization. This nanoprobe represents an efficient strategy to promote and monitor biomineralization-related metabolic activities with applications in fundamental research, disease diagnosis, and regenerative medicine.
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Affiliation(s)
- Zhihao Li
- Key Laboratory of Analytical Chemistry for Biological Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Haoran Liu
- Key Laboratory of Analytical Chemistry for Biological Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Rui Wang
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine (Ministry of Education), School and Hospital of Stomatology, Wuhan University, Wuhan, 430072, China
| | - Chenhui Ji
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Yan Wei
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine (Ministry of Education), School and Hospital of Stomatology, Wuhan University, Wuhan, 430072, China
| | - Miusi Shi
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine (Ministry of Education), School and Hospital of Stomatology, Wuhan University, Wuhan, 430072, China
| | - Yingqian Wang
- Key Laboratory of Analytical Chemistry for Biological Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Yaping Du
- School of Materials Science and Engineering & National Institute for Advanced Materials, Key Laboratory of Advanced Energy Materials Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, Centre for Rare Earth and Inorganic Functional Materials, Nankai University, Tianjin, 300350, China
| | - Yufeng Zhang
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine (Ministry of Education), School and Hospital of Stomatology, Wuhan University, Wuhan, 430072, China
| | - Quan Yuan
- Key Laboratory of Analytical Chemistry for Biological Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Chunhua Yan
- School of Materials Science and Engineering & National Institute for Advanced Materials, Key Laboratory of Advanced Energy Materials Chemistry, Tianjin Key Lab for Rare Earth Materials and Applications, Centre for Rare Earth and Inorganic Functional Materials, Nankai University, Tianjin, 300350, China
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Jacobs A, Renaudin G, Forestier C, Nedelec JM, Descamps S. Biological properties of copper-doped biomaterials for orthopedic applications: A review of antibacterial, angiogenic and osteogenic aspects. Acta Biomater 2020; 117:21-39. [PMID: 33007487 DOI: 10.1016/j.actbio.2020.09.044] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/17/2020] [Accepted: 09/21/2020] [Indexed: 12/13/2022]
Abstract
Copper is an essential trace element required for human life, and is involved in several physiological mechanisms. Today researchers have found and confirmed that Cu has biological properties which are particularly useful for orthopedic biomaterials applications such as implant coatings or biodegradable filler bone substitutes. Indeed, Cu exhibits antibacterial functions, provides angiogenic ability and favors osteogenesis; these represent major key points for ideal biomaterial integration and the healing process that follows. The antibacterial performances of copper-doped biomaterials present an interesting alternative to the massive use of prophylactic antibiotics and help to limit the development of antibiotic resistance. By stimulating blood vessel growth and new bone formation, copper contributes to the improved bio-integration of biomaterials. This review describes the bio-functional advantages offered by Cu and focuses on the antibacterial, angiogenic and osteogenic properties of Cu-doped biomaterials with potential for orthopedic applications.
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22
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Moseke C, Wimmer K, Meininger M, Zerweck J, Wolf-Brandstetter C, Gbureck U, Ewald A. Osteoclast and osteoblast response to strontium-doped struvite coatings on titanium for improved bone integration. ACTA ACUST UNITED AC 2020; 65:631-641. [PMID: 32452822 DOI: 10.1515/bmt-2019-0265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 01/31/2020] [Indexed: 11/15/2022]
Abstract
To develop implants with improved bone ingrowth, titanium substrates were coated with homogeneous and dense struvite (MgNH4PO4·6H2O) layers by means of electrochemically assisted deposition. Strontium nitrate was added to the coating electrolyte in various concentrations, in order to fabricate Sr-doped struvite coatings with Sr loading ranging from 10.6 to 115 μg/cm2. It was expected and observed that osteoclast activity surrounding the implant was inhibited. The cytocompatibility of the coatings and the effect of Sr-ions in different concentrations on osteoclast formation were analyzed in vitro. Osteoclast differentiation was elucidated on morphological, biochemical as well as on gene expression level. It could be shown that moderate concentrations of Sr2+ had an inhibitory effect on osteoclast formation, while the growth of osteoblastic cells was not negatively influenced compared to pure struvite surfaces. In summary, the electrochemically deposited Sr-doped struvite coatings are a promising approach to improve bone implant ingrowth.
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Affiliation(s)
- Claus Moseke
- Institute for Biomedical Engineering (IBMT), University of Applied Sciences Mittelhessen (THM), Giessen, Germany
| | - Katharina Wimmer
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Würzburg, Germany
| | - Markus Meininger
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Würzburg, Germany
| | - Julia Zerweck
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Würzburg, Germany
| | | | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Würzburg, Germany
| | - Andrea Ewald
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany
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The Influence of Ozonated Olive Oil-Loaded and Copper-Doped Nanohydroxyapatites on Planktonic Forms of Microorganisms. NANOMATERIALS 2020; 10:nano10101997. [PMID: 33050423 PMCID: PMC7650683 DOI: 10.3390/nano10101997] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/28/2020] [Accepted: 09/29/2020] [Indexed: 12/12/2022]
Abstract
The research has been carried out with a focus on the assessment of the antimicrobial efficacy of pure nanohydroxyapatite, Cu2+-doped nanohydroxyapatite, ozonated olive oil-loaded nanohydroxyapatite, and Cu2+-doped nanohydroxyapatite, respectively. Their potential antimicrobial activity was investigated against Streptococcus mutans, Lactobacillus rhamnosus, and Candida albicans. Among all tested materials, the highest efficacy was observed in terms of ozonated olive oil. The studies were performed using an Ultraviolet–Visible spectrophotometry (UV-Vis), electron microscopy, and statistical methods, by determining the value of Colony-Forming Units (CFU/mL) and Minimal Inhibitory Concentration (MIC).
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Wang N, Yu X, Kong Q, Li Z, Li P, Ren X, Peng B, Deng Z. Nisin-loaded polydopamine/hydroxyapatite composites: Biomimetic synthesis, and in vitro bioactivity and antibacterial activity evaluations. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125101] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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25
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Ascone G, Cao Y, Jansen ID, Di Ceglie I, van den Bosch MH, Blom AB, van Lent PL, Everts V, de Vries TJ. Increase in the Number of Bone Marrow Osteoclast Precursors at Different Skeletal Sites, Particularly in Long Bone and Jaw Marrow in Mice Lacking IL-1RA. Int J Mol Sci 2020; 21:ijms21113774. [PMID: 32471111 PMCID: PMC7312984 DOI: 10.3390/ijms21113774] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/21/2020] [Accepted: 05/24/2020] [Indexed: 12/14/2022] Open
Abstract
Recently, it was shown that interleukin-1β (IL-1β) has diverse stimulatory effects on different murine long bone marrow osteoclast precursors (OCPs) in vitro. In this study, interleukin-1 receptor antagonist deficient (Il1rn-/-) and wild-type (WT) mice were compared to investigate the effects of enhanced IL-1 signaling on the composition of OCPs in long bone, calvaria, vertebra, and jaw. Bone marrow cells were isolated from these sites and the percentage of early blast (CD31hi Ly-6C-), myeloid blast (CD31+ Ly-6C+), and monocyte (CD31- Ly-6Chi) OCPs was assessed by flow cytometry. At the time-point of cell isolation, Il1rn-/- mice showed no inflammation or bone destruction yet as determined by histology and microcomputed tomography. However, Il1rn-/- mice had an approximately two-fold higher percentage of OCPs in long bone and jaw marrow compared to WT. Conversely, vertebrae and calvaria marrow contained a similar composition of OCPs in both strains. Bone marrow cells were cultured with macrophage colony stimulating factor (M-CSF) and receptor of NfκB ligand (RANKL) on bone slices to assess osteoclastogenesis and on calcium phosphate-coated plates to analyze mineral dissolution. Deletion of Il1rn increased osteoclastogenesis from long bone, calvaria, and jaw marrows, and all Il1rn-/- cultures showed increased mineral dissolution compared to WT. However, osteoclast markers increased exclusively in Il1rn-/- osteoclasts from long bone and jaw. Collectively, these findings indicate that a lack of IL-1RA increases the numbers of OCPs in vivo, particularly in long bone and jaw, where rheumatoid arthritis and periodontitis develop. Thus, increased bone loss at these sites may be triggered by a larger pool of OCPs due to the disruption of IL-1 inhibitors.
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Affiliation(s)
- Giuliana Ascone
- Experimental Rheumatology, Radboud University Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands; (G.A.); (I.D.C.); (M.H.J.v.d.B.); (A.B.B.); (P.L.E.M.v.L.)
| | - Yixuan Cao
- Department of Oral Cell Biology and Functional Anatomy, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Gustav Mahlerlaan 3004, 1081 LA Amsterdam, The Netherlands; (Y.C.); (V.E.)
| | - Ineke D.C. Jansen
- Department of Periodontology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam Gustav Mahlerlaan 2004, 1081 LA Amsterdam, The Netherlands;
| | - Irene Di Ceglie
- Experimental Rheumatology, Radboud University Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands; (G.A.); (I.D.C.); (M.H.J.v.d.B.); (A.B.B.); (P.L.E.M.v.L.)
| | - Martijn H.J. van den Bosch
- Experimental Rheumatology, Radboud University Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands; (G.A.); (I.D.C.); (M.H.J.v.d.B.); (A.B.B.); (P.L.E.M.v.L.)
| | - Arjen B. Blom
- Experimental Rheumatology, Radboud University Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands; (G.A.); (I.D.C.); (M.H.J.v.d.B.); (A.B.B.); (P.L.E.M.v.L.)
| | - Peter L.E.M. van Lent
- Experimental Rheumatology, Radboud University Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands; (G.A.); (I.D.C.); (M.H.J.v.d.B.); (A.B.B.); (P.L.E.M.v.L.)
| | - Vincent Everts
- Department of Oral Cell Biology and Functional Anatomy, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Gustav Mahlerlaan 3004, 1081 LA Amsterdam, The Netherlands; (Y.C.); (V.E.)
| | - Teun J. de Vries
- Department of Periodontology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam Gustav Mahlerlaan 2004, 1081 LA Amsterdam, The Netherlands;
- Correspondence:
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Abstract
Surface modification of orthopedic and dental implants has been demonstrated to be an effective strategy to accelerate bone healing at early implantation times. Among the different alternatives, coating implants with a layer of hydroxyapatite (HAp) is one of the most used techniques, due to its excellent biocompatibility and osteoconductive behavior. The composition and crystalline structure of HAp allow for numerous ionic substitutions that provide added value, such as antibiotic properties or osteoinduction. In this article, we will review and critically analyze the most important advances in the field of substituted hydroxyapatite coatings. In recent years substituted HAp coatings have been deposited not only on orthopedic prostheses and dental implants, but also on macroporous scaffolds, thus expanding their applications towards bone regeneration therapies. Besides, the capability of substituted HAps to immobilize proteins and growth factors by non-covalent interactions has opened new possibilities for preparing hybrid coatings that foster bone healing processes. Finally, the most important in vivo outcomes will be discussed to understand the prospects of substituted HAp coatings from a clinical point of view.
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Affiliation(s)
- Daniel Arcos
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria del Hospital 12 de Octubre i + 12, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain. and CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN), Spain
| | - María Vallet-Regí
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria del Hospital 12 de Octubre i + 12, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain. and CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER-BBN), Spain
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Effect of Hydrothermal (Sr)-Hydroxyapatite Coatings on the Corrosion Resistance and Mg 2+ Ion Release to Enhance Osteoblastic Cell Responses of AZ91D Alloy. MATERIALS 2020; 13:ma13030591. [PMID: 32012748 PMCID: PMC7040582 DOI: 10.3390/ma13030591] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/20/2020] [Accepted: 01/22/2020] [Indexed: 11/17/2022]
Abstract
The biomedical applications of Mg-based alloys are limited by their rapid corrosion rate in the body fluid. In this study, the hydrothermal synthesis is employed to produce protective bioactive hydroxyapatite coating (HAC) and strontium-substituted hydroxyapatite coating (Sr-HAC) to further enhance the corrosion resistance and in vitro biocompatibility of biodegradable AZ91D Mg alloy in physiological environments. For comparison, the brucite Mg(OH)2 prepared by the alkaline pre-treatment is designated as a control group. Experimental evidences of XRD and XPS analysis confirm that Sr2+ ions can be incorporated into HA crystal structure. It is noted that the hydrothermally synthesized Sr-HAC conversion coating composed of a specific surface topography with the nanoscaled flake-like fine crystallites is constructed on the AZ91D Mg alloy. The hydrophilicity of Mg substrate is effectively enhanced with the decrease in static contact angles after performing alkaline and hydrothermal treatments. Potentiodynamic polarization measurements reveal that the nanostructured Sr-HAC-coated specimens exhibit superior corrosion resistance than HAC and alkaline pre-treated Mg(OH)2. Moreover, immersion tests demonstrate that Sr-HAC provides favorable long-term stability for the Mg alloy with decreasing concentration of released Mg2+ ions in the SBF and the reduced corrosion rate during the immersion length of 30 days. The cells cultured on Sr-HAC specimens exhibit higher viability than those on the alkaline-pre-treated Mg(OH)2 and HAC specimens. The Sr-substituted HA coating with a nanostructured surface topography can help to stimulate the cell viability of osteoblastic cells.
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Sun R, Åhlén M, Tai CW, Bajnóczi ÉG, de Kleijne F, Ferraz N, Persson I, Strømme M, Cheung O. Highly Porous Amorphous Calcium Phosphate for Drug Delivery and Bio-Medical Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 10:E20. [PMID: 31861727 PMCID: PMC7022897 DOI: 10.3390/nano10010020] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/13/2019] [Accepted: 12/16/2019] [Indexed: 12/21/2022]
Abstract
Amorphous calcium phosphate (ACP) has shown significant effects on the biomineralization and promising applications in bio-medicine. However, the limited stability and porosity of ACP material restrict its practical applications. A storage stable highly porous ACP with Brunauer-Emmett-Teller surface area of over 400 m2/g was synthesized by introducing phosphoric acid to a methanol suspension containing amorphous calcium carbonate nanoparticles. Electron microscopy revealed that the porous ACP was constructed with aggregated ACP nanoparticles with dimensions of several nanometers. Large angle X-ray scattering revealed a short-range atomic order of <20 Å in the ACP nanoparticles. The synthesized ACP demonstrated long-term stability and did not crystallize even after storage for over 14 months in air. The stability of the ACP in water and an α-MEM cell culture medium were also examined. The stability of ACP could be tuned by adjusting its chemical composition. The ACP synthesized in this work was cytocompatible and acted as drug carriers for the bisphosphonate drug alendronate (AL) in vitro. AL-loaded ACP released ~25% of the loaded AL in the first 22 days. These properties make ACP a promising candidate material for potential application in biomedical fields such as drug delivery and bone healing.
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Affiliation(s)
- Rui Sun
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
| | - Michelle Åhlén
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
| | - Cheuk-Wai Tai
- Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden;
| | - Éva G. Bajnóczi
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden; (É.G.B.); (I.P.)
| | - Fenne de Kleijne
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
| | - Natalia Ferraz
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
| | - Ingmar Persson
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden; (É.G.B.); (I.P.)
| | - Maria Strømme
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
| | - Ocean Cheung
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
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Deng Y, Ma F, Ruiz-Ortega L, Peng Y, Tian Y, He W, Tang B. Fabrication of strontium Eucommia ulmoides polysaccharides and in vitro evaluation of their osteoimmunomodulatory property. Int J Biol Macromol 2019; 140:727-735. [DOI: 10.1016/j.ijbiomac.2019.08.145] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 08/08/2019] [Accepted: 08/17/2019] [Indexed: 12/11/2022]
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30
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Uskoković V, Janković-Častvan I, Wu VM. Bone Mineral Crystallinity Governs the Orchestration of Ossification and Resorption during Bone Remodeling. ACS Biomater Sci Eng 2019; 5:3483-3498. [DOI: 10.1021/acsbiomaterials.9b00255] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Vuk Uskoković
- Department of Mechanical and Aerospace Engineering, University of California, Irvine, Engineering Gateway 4200, Irvine, California 92697, United States
- Department of Bioengineering, University of Illinois, 851 South Morgan Street, Chicago, Illinois 60607-7052, United States
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, 1600 Fourth Street, San Francisco, California 94158, United States
| | - Ivona Janković-Častvan
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade 11000, Serbia
| | - Victoria M. Wu
- Department of Bioengineering, University of Illinois, 851 South Morgan Street, Chicago, Illinois 60607-7052, United States
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31
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Nguyen TDT, Jang YS, Lee MH, Bae TS. Effect of strontium doping on the biocompatibility of calcium phosphate-coated titanium substrates. J Appl Biomater Funct Mater 2019; 17:2280800019826517. [PMID: 30803306 DOI: 10.1177/2280800019826517] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND: Titanium biomedical devices coated with strontium-doped calcium phosphate ceramics can support desirable bone regeneration through anabolic and anti-catabolic effects of strontium and the compositions close to that of natural mineral tissue. METHODS: Strontium was doped into the calcium phosphate coating using the cyclic pre-calcification method on the anodized titanium plate. The effects of the different concentration of strontium in treatment solution and cycle numbers of the pre-calcification treatment on the biocompatibility were investigated in terms of the changes in morphology and chemical composition of coating, ion release pattern and cytocompatibility in vitro. RESULTS: At a high substitution ratio of strontium in the calcium phosphate coating, the size of precipitated particles was decreased and the solubility of the coating was increased. ASH55 group, which was coated by pre-calcification treatment of 20 cycles in coating solution with Sr:Ca molar ratio of 5:5, exhibited superior cellular attachment at 1 day and proliferation after 7 days of culturing in comparison with the non-doped surface and other doped surfaces. CONCLUSION: Sufficient strontium doping concentrations in calcium phosphate coating can enhance cell adhesion and proliferation on the titanium biomedical devices for bone regeneration.
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Affiliation(s)
- Thuy-Duong Thi Nguyen
- 1 Odonto-stomatology Faculty, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
| | - Yong-Seok Jang
- 2 Department of Dental Biomaterials and Institute of Biodegradable Material, Chonbuk National University, Jeonju, South Korea
| | - Min-Ho Lee
- 2 Department of Dental Biomaterials and Institute of Biodegradable Material, Chonbuk National University, Jeonju, South Korea
| | - Tae-Sung Bae
- 2 Department of Dental Biomaterials and Institute of Biodegradable Material, Chonbuk National University, Jeonju, South Korea
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32
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Ghosh R, Swart O, Westgate S, Miller BL, Yates MZ. Antibacterial Copper-Hydroxyapatite Composite Coatings via Electrochemical Synthesis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5957-5966. [PMID: 30951314 DOI: 10.1021/acs.langmuir.9b00919] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Antibacterial copper-hydroxyapatite (Cu-HA) composite coatings on titanium were synthesized using a novel process consisting of two consecutive electrochemical reactions. In the first stage, HA nanocrystals were grown on titanium using the cathodic electrolytic synthesis. The HA-coated titanium was then used as the cathode in a second reaction stage to electrochemically reduce Cu2+ ions in solution to metallic Cu nanoparticles. Reaction conditions were found that result in nanoscale Cu particles growing on the surface of the HA crystals. The two-stage synthesis allows facile control of copper content in the HA coatings. Antibacterial activity was measured by culturing Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) in the presence of coatings having varying copper contents. The coatings displayed copper concentration-dependent antibacterial activity against both types of bacteria, likely due to the slow release of copper ions from the coatings. The observation of antibacterial activity from a relatively low loading of copper on the bioactive HA support suggests that multifunctional implant coatings can be developed to supplement or supplant prophylactic antibiotics used in implant surgery that are responsible for creating resistant bacteria strains.
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Affiliation(s)
- Rashmi Ghosh
- Department of Chemical Engineering , University of Rochester , Rochester , New York 14623 , United States
| | - Oliver Swart
- Department of Dermatology , University of Rochester , Rochester , New York 14611 , United States
| | - Sabrina Westgate
- Department of Chemical Engineering , University of Rochester , Rochester , New York 14623 , United States
| | - Benjamin L Miller
- Department of Dermatology , University of Rochester , Rochester , New York 14611 , United States
| | - Matthew Z Yates
- Department of Chemical Engineering , University of Rochester , Rochester , New York 14623 , United States
- Laboratory for Laser Energetics , University of Rochester , Rochester , New York 14627 , United States
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Cao M, Zhou Y, Mao J, Wei P, Chen D, Wang R, Cai Q, Yang X. Promoting osteogenic differentiation of BMSCs via mineralization of polylactide/gelatin composite fibers in cell culture medium. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 100:862-873. [PMID: 30948124 DOI: 10.1016/j.msec.2019.02.079] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 07/16/2018] [Accepted: 02/20/2019] [Indexed: 12/31/2022]
Abstract
Mineralization capability is an important issue in developing bone repairing biomaterials, while it is not quite clear how this feature would act in the presence of cells and influence cell osteogenic differentiation without adding extra osteoinductive factors such as β‑sodium glycerophosphate and dexamethasone. Poly(l‑lactide) (PLLA) and gelatin composite fibers (PG, 1:1 in weight) were electrospun, treated with CaCl2 solution (PG-Ca), and used for mineralization studies by using cell culture media (αMEM, and αMEM + serum). Bone mesenchymal stromal cells (BMSCs) were then seeded and cultured on both PG and PG-Ca fibrous mats for 28 days by only using αMEM + serum. Interestingly, mineral depositions on both PG and PG-Ca fibers were detected in the environment of αMEM or αMEM + serum, in which, PG-Ca fibers demonstrated stronger ability in inducing hydroxyapatite formation than PG fibers, especially in the presence of fetal bovine serum. When BMSCs were cultured on the two kinds of fibrous mats, apatite depositions were still clearly detected, while the depositing amounts decreased in comparison with corresponding cell-free cases. It was ascribed to the consumption of ions by the continuously proliferating BMSCs, whose osteogenic differentiation was significantly promoted even without extra osteoinductive factors, especially on PG-Ca fibrous mats, in comparison with the control group. Therefore, it was confirmed the capability of scaffolding materials in enriching ions like calcium and phosphate around cells was an efficient way to promote bone regeneration.
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Affiliation(s)
- Man Cao
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Yan Zhou
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Jianping Mao
- Department of Spine Surgery, Beijing Jishuitan Hospital, Beijing 100035, PR China
| | - Pengfei Wei
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Dafu Chen
- Laboratory of Bone Tissue Engineering, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Beijing 100035, PR China
| | - Renxian Wang
- Laboratory of Bone Tissue Engineering, Beijing Research Institute of Traumatology and Orthopaedics, Beijing Jishuitan Hospital, Beijing 100035, PR China
| | - Qing Cai
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China.
| | - Xiaoping Yang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China.
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Investigation on Corrosion Resistance and Formation Mechanism of a P–F–Zr Contained Micro-Arc Oxidation Coating on AZ31B Magnesium Alloy Using an Orthogonal Method. COATINGS 2019. [DOI: 10.3390/coatings9030197] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In this study, the synergistic effects of NH4HF2, sodium phytate (Na12Phy), K2ZrF6, and treatment time on corrosion resistance of a micro-arc oxidation (MAO) treated magnesium alloy and the entrance mechanism of P, F, and Zr into anodic coatings were investigated using an orthogonal method. In addition, the roles of NH4HF2, Na12Phy, and K2ZrF6 on coating development were separately studied. The results show that NH4HF2 and Na12Phy, the corrosion inhibitors of magnesium alloys, are beneficial but K2ZrF6 is harmful to developing anodic coatings. The corrosion resistance of MAO coatings is synergistically determined by coating characteristics, though the coating thickness plays a main role. Na12Phy significantly improves but NH4HF2 decreases the corrosion resistance of MAO coatings, while excess high K2ZrF6 is harmful to the coating corrosion resistance. Treatment time can increase the coating thickness but is the least important factor in corrosion resistance. During MAO, NH4HF2, Na12Phy, and K2ZrF6 take part in coating formation, causing P, F, and Zr to compete with each other to enter into anodic coatings.
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35
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Meininger S, Moseke C, Spatz K, März E, Blum C, Ewald A, Vorndran E. Effect of strontium substitution on the material properties and osteogenic potential of 3D powder printed magnesium phosphate scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 98:1145-1158. [PMID: 30812998 DOI: 10.1016/j.msec.2019.01.053] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 01/11/2019] [Accepted: 01/12/2019] [Indexed: 12/27/2022]
Abstract
3D powder printing is a versatile method for the fabrication of individual bone implants and was used for the processing of in vivo degradable ceramic scaffolds based on ammonium magnesium phosphate hexahydrate (struvite). In this study, synergetic effects could be achieved by the substitution of magnesium phosphate cements with strontium carbonate. This substitution resulted in 8.2 wt%, 16.4 wt%, and 24.6 wt% Sr2+ doped scaffolds, with a 1.9-3.1 times increased radiopacity compared to pure struvite. The maximal compressive strength of (16.1 ± 1.1) MPa found for strontium substituted magnesium phosphate was in the range of cancelleous bone, which makes these 3D printed structures suitable for medical application in low-load-bearing bone areas. In an ion release study over a course of 18 days, the release of strontium, magnesium, calcium, and phosphate ions from scaffolds was analyzed by means of inductively coupled plasma mass spectrometry. Independent of the scaffold composition the Mg2+ concentrations (83-499 mg/l) continuously increased in the cell media. The Sr2+ release varied between 4.3 μg/day and 15.1 μg/day per g scaffold, corresponding to a Sr2+ concentration in media between 1.14 mg/l and 7.24 mg/l. Moreover, decreasing calcium and phosphate concentrations indicated the precipitation of an amorphous calcium phosphate phase. The superior osteogenic properties of strontium substituted magnesium phosphate, e.g. the increase of osteoblast activity and cell number and the simultaneous suppression of osteoclast differentiation could be verified in vitro by means of WST-assay, TRAP-staining, and SEM imaging.
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Affiliation(s)
- Susanne Meininger
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Germany
| | - Claus Moseke
- Institute for Biomedical Engineering (IBMT), University of Applied Sciences Mittelhessen (THM), Gießen, Germany
| | - Kerstin Spatz
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Germany
| | - Emilie März
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Germany
| | - Carina Blum
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Germany
| | - Andrea Ewald
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Germany
| | - Elke Vorndran
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Germany.
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36
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Santos-Coquillat A, Mohedano M, Martinez-Campos E, Arrabal R, Pardo A, Matykina E. Bioactive multi-elemental PEO-coatings on titanium for dental implant applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 97:738-752. [PMID: 30678963 DOI: 10.1016/j.msec.2018.12.097] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 11/28/2018] [Accepted: 12/25/2018] [Indexed: 01/22/2023]
Abstract
Bioactive PEO (Plasma Electrolytic Oxidation) coatings were generated on Grade I commercially pure titanium for dentistry applications using a Ca/P-based electrolyte with added Si, Mg, Zn or F species. Surface characteristics, chemical composition and ion liberation of the coatings were characterized using SEM/EDS, X-ray diffraction, optical profilometry, contact angle and ICP-OES. Corrosion resistance (OCP and DC polarization) was evaluated in SBF. Osteoblastogenesis and osteoclastogenesis processes on PEO-coated Ti and non-coated Ti controls were assessed after 7 days and 5 days of cell culture, respectively. Monolayer formation and metabolic activity were evaluated for the MC3T3 preosteoblastic cell line. All PEO coatings favoured differentiation processes over proliferation and presented three times greater quantity of secreted collagen than non-coated Ti control. All coating enabled osteoclast differentiation, with differences in number and size of the osteoclasts between the materials.
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Affiliation(s)
- A Santos-Coquillat
- Departamento de Ingenieria Química y de Materiales, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain; Tissue Engineering Group, Institute of Biofunctional Studies (IEB-UCM), Associated Unit to the Institute of Polymer Science and Technology (CSIC), Polymer Functionalization Group, 28040 Madrid, Spain.
| | - M Mohedano
- Departamento de Ingenieria Química y de Materiales, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain
| | - E Martinez-Campos
- Tissue Engineering Group, Institute of Biofunctional Studies (IEB-UCM), Associated Unit to the Institute of Polymer Science and Technology (CSIC), Polymer Functionalization Group, 28040 Madrid, Spain; Institute of Biofunctional Studies of Complutense University of Madrid (IEB-UCM), Paseo Juan XXIII, 1, 28040 Madrid, Spain
| | - R Arrabal
- Departamento de Ingenieria Química y de Materiales, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain
| | - A Pardo
- Departamento de Ingenieria Química y de Materiales, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain
| | - E Matykina
- Departamento de Ingenieria Química y de Materiales, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain; Institute of Biofunctional Studies of Complutense University of Madrid (IEB-UCM), Paseo Juan XXIII, 1, 28040 Madrid, Spain
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Xu X, Lu Y, Li S, Guo S, He M, Luo K, Lin J. Copper-modified Ti6Al4V alloy fabricated by selective laser melting with pro-angiogenic and anti-inflammatory properties for potential guided bone regeneration applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 90:198-210. [DOI: 10.1016/j.msec.2018.04.046] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 02/11/2018] [Accepted: 04/16/2018] [Indexed: 12/11/2022]
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Xu X, Lu Y, Yang X, Du Z, Zhou L, Li S, Chen C, Luo K, Lin J. Copper-Modified Ti6Al4 V Suppresses Inflammatory Response and Osteoclastogenesis while Enhancing Extracellular Matrix Formation for Osteoporotic Bone Regeneration. ACS Biomater Sci Eng 2018; 4:3364-3373. [PMID: 33435071 DOI: 10.1021/acsbiomaterials.8b00736] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Copper has been reported to promote bone regeneration by increasing osteogenesis and decreasing inflammation and osteoclastogenesis. However, information on the effects of copper on osteoporotic cells involved in bone regeneration is scarce in the literature. In the current study, Ti6Al4 V-6 wt %Cu (Ti6Al4 V-Cu) was fabricated by selective laser melting (SLM) technology, and the effects of copper on the behaviors of osteoporotic and nonosteoporotic macrophages, osteoclasts, and osteoblasts were evaluated by comparison with Ti6Al4 V. Our results showed that Ti6Al4 V-Cu inhibited the activation, viability, and pro-inflammatory cytokine secretion of osteoporotic macrophages and decreased osteoclast formation and down-regulated osteoclast differentiation-related genes and proteins of osteoporotic osteoclasts. Furthermore, the bone extracellular matrix formation of osteoporotic osteoblasts was up-regulated by Ti6Al4 V-Cu. In conclusion, SLM-fabricated Ti6Al4 V-Cu exhibited excellent anti-inflammation and antiosteoclast capability, optimized extracellular matrix formation, and holds great potential for bone regeneration in osteoporotic patients.
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Affiliation(s)
- Xiongcheng Xu
- Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, 246 Yangqiao Zhong Road, Fuzhou 350002, China
| | - Yanjin Lu
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 West Yangqiao Road, Fuzhou 350002, China.,University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 1000049, China
| | - Xue Yang
- Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, 246 Yangqiao Zhong Road, Fuzhou 350002, China
| | - Zhibin Du
- Institute of Health and Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove Campus, Brisbane, 4059 Queensland, Australia
| | - Ling Zhou
- Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, 246 Yangqiao Zhong Road, Fuzhou 350002, China
| | - Shuman Li
- Department of Stomatology, Fujian Provincial Geriatric Hospital, 147 Beihuan Zhong Road, Fuzhou 350002, China
| | - Chao Chen
- Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, 246 Yangqiao Zhong Road, Fuzhou 350002, China
| | - Kai Luo
- Fujian Biological Materials Engineering and Technology Center of Stomatology, School and Hospital of Stomatology, Fujian Medical University, 246 Yangqiao Zhong Road, Fuzhou 350002, China
| | - Jinxin Lin
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 West Yangqiao Road, Fuzhou 350002, China
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Hydroxyapatite coated poly(lactic acid) microparticles with copper ion doping prepared via the Pickering emulsion route. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4364-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Modulation of Osteoclast Interactions with Orthopaedic Biomaterials. J Funct Biomater 2018; 9:jfb9010018. [PMID: 29495358 PMCID: PMC5872104 DOI: 10.3390/jfb9010018] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 02/11/2018] [Accepted: 02/13/2018] [Indexed: 12/17/2022] Open
Abstract
Biomaterial integration in bone depends on bone remodelling at the bone-implant interface. Optimal balance of bone resorption by osteoclasts and bone deposition by osteoblasts is crucial for successful implantation, especially in orthopaedic surgery. Most studies examined osteoblast differentiation on biomaterials, yet few research has been conducted to explore the effect of different orthopaedic implants on osteoclast development. This review covers, in detail, the biology of osteoclasts, in vitro models of osteoclasts, and modulation of osteoclast activity by different implant surfaces, bio-ceramics, and polymers. Studies show that surface topography influence osteoclastogenesis. For instance, metal implants with rough surfaces enhanced osteoclast activity, while smooth surfaces resulted in poor osteoclast differentiation. In addition, surface modification of implants with anti-osteoporotic drug further decreased osteoclast activity. In bioceramics, osteoclast development depended on different chemical compositions. Strontium-incorporated bioceramics decreased osteoclast development, whereas higher concentrations of silica enhanced osteoclast activity. Differences between natural and synthetic polymers also modulated osteoclastogenesis. Physiochemical properties of implants affect osteoclast activity. Hence, understanding osteoclast biology and its response to the natural microarchitecture of bone are indispensable to design suitable implant interfaces and scaffolds, which will stimulate osteoclasts in ways similar to that of native bone.
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Zhang D, Lee J, Kilian KA. Synthetic Biomaterials to Rival Nature's Complexity-a Path Forward with Combinatorics, High-Throughput Discovery, and High-Content Analysis. Adv Healthc Mater 2017; 6. [PMID: 28841770 DOI: 10.1002/adhm.201700535] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 06/08/2017] [Indexed: 12/18/2022]
Abstract
Cells in tissue receive a host of soluble and insoluble signals in a context-dependent fashion, where integration of these cues through a complex network of signal transduction cascades will define a particular outcome. Biomaterials scientists and engineers are tasked with designing materials that can at least partially recreate this complex signaling milieu towards new materials for biomedical applications. In this progress report, recent advances in high throughput techniques and high content imaging approaches that are facilitating the discovery of efficacious biomaterials are described. From microarrays of synthetic polymers, peptides and full-length proteins, to designer cell culture systems that present multiple biophysical and biochemical cues in tandem, it is discussed how the integration of combinatorics with high content imaging and analysis is essential to extracting biologically meaningful information from large scale cellular screens to inform the design of next generation biomaterials.
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Affiliation(s)
- Douglas Zhang
- Department of Materials Science and Engineering; University of Illinois at Urbana-Champaign; Urbana Illinois 61801
| | - Junmin Lee
- Department of Materials Science and Engineering; University of Illinois at Urbana-Champaign; Urbana Illinois 61801
| | - Kristopher A. Kilian
- Department of Materials Science and Engineering; University of Illinois at Urbana-Champaign; Urbana Illinois 61801
- Department of Bioengineering; University of Illinois at Urbana-Champaign; Urbana Illinois 61801
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Bernhardt A, Schamel M, Gbureck U, Gelinsky M. Osteoclastic differentiation and resorption is modulated by bioactive metal ions Co2+, Cu2+ and Cr3+ incorporated into calcium phosphate bone cements. PLoS One 2017; 12:e0182109. [PMID: 28763481 PMCID: PMC5538673 DOI: 10.1371/journal.pone.0182109] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Accepted: 07/12/2017] [Indexed: 11/19/2022] Open
Abstract
Biologically active metal ions in low doses have the potential to accelerate bone defect healing. For successful remodelling the interaction of bone graft materials with both bone-forming osteoblasts and bone resorbing osteoclasts is crucial. In the present study brushite forming calcium phosphate cements (CPC) were doped with Co2+, Cu2+ and Cr3+ and the influence of these materials on osteoclast differentiation and activity was examined. Human osteoclasts were differentiated from human peripheral blood mononuclear cells (PBMC) both on the surface and in indirect contact to the materials on dentin discs. Release of calcium, phosphate and bioactive metal ions was determined using ICP-MS both in the presence and absence of the cells. While Co2+ and Cu2+ showed a burst release, Cr3+ was released steadily at very low concentrations (below 1 μM) and both calcium and phosphate release of the cements was considerably changed in the Cr3+ modified samples. Direct cultivation of PBMC/osteoclasts on Co2+ cements showed lower attached cell number compared to the reference but high activity of osteoclast specific enzymes tartrate resistant acid phosphatase (TRAP), carbonic anhydrase II (CAII) and cathepsin K (CTSK) and significantly increased gene expression of vitronectin receptor. Indirect cultivation with diluted Co2+ cement extracts revealed highest resorbed area compared to all other modifications and the reference. Cu2+ cements had cytotoxic effect on PBMC/osteoclasts during direct cultivation, while indirect cultivation with diluted extracts from Cu2+ cements did not provoke cytotoxic effects but a strictly inhibited resorption. Cr3+ doped cements did not show cytotoxic effects at all. Gene expression and enzyme activity of CTSK was significantly increased in direct culture. Indirect cultivation with Cr3+ doped cements revealed significantly higher resorbed area compared to the reference. In conclusion Cr3+ doped calcium phosphate cements are an innovative cement modification because of their high cytocompatibility and support of active resorption by osteoclasts.
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Affiliation(s)
- Anne Bernhardt
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine of Technische Universität Dresden, Dresden, Germany
| | - Martha Schamel
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Würzburg, Germany
| | - Uwe Gbureck
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg, Würzburg, Germany
| | - Michael Gelinsky
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine of Technische Universität Dresden, Dresden, Germany
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Samanta A, Podder S, Ghosh CK, Bhattacharya M, Ghosh J, Mallik AK, Dey A, Mukhopadhyay AK. ROS mediated high anti-bacterial efficacy of strain tolerant layered phase pure nano-calcium hydroxide. J Mech Behav Biomed Mater 2017; 72:110-128. [DOI: 10.1016/j.jmbbm.2017.04.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 03/30/2017] [Accepted: 04/05/2017] [Indexed: 12/18/2022]
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Galván-Chacón VP, Habibovic P. Deconvoluting the Bioactivity of Calcium Phosphate-Based Bone Graft Substitutes: Strategies to Understand the Role of Individual Material Properties. Adv Healthc Mater 2017; 6. [PMID: 28544743 DOI: 10.1002/adhm.201601478] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/24/2017] [Indexed: 02/06/2023]
Abstract
Calcium phosphate (CaP)-based ceramics are the most widely applied synthetic biomaterials for repair and regeneration of damaged and diseased bone. CaP bioactivity is regulated by a set of largely intertwined physico-chemical and structural properties, such as the surface microstructure, surface energy, porosity, chemical composition, crystallinity and stiffness. Unravelling the role of each individual property in the interaction between the biomaterial and the biological system is a prerequisite for evolving from a trial-and-error approach to a design-driven approach in the development of new functional biomaterials. This progress report critically reviews various strategies developed to decouple the roles of the individual material properties in the biological performance of CaP ceramics. It furthermore emphasizes on the importance of a comprehensive and adequate material characterization that is needed to enhance our knowledge of the property-function relationship of biomaterials used in bone regeneration, and in regenerative medicine in general.
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Affiliation(s)
| | - Pamela Habibovic
- MERLN Institute; Maastricht University; P.O. Box 616 6200 MD Maastricht The Netherlands
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Rau JV, Wu VM, Graziani V, Fadeeva IV, Fomin AS, Fosca M, Uskoković V. The Bone Building Blues: Self-hardening copper-doped calcium phosphate cement and its in vitro assessment against mammalian cells and bacteria. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017. [PMID: 28629018 DOI: 10.1016/j.msec.2017.05.052] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A blue calcium phosphate cement with optimal self-hardening properties was synthesized by doping whitlockite (β-TCP) with copper ions. The mechanism and the kinetics of the cement solidification process were studied using energy dispersive X-ray diffraction and it was found out that hardening was accompanied by the phase transition from TCP to brushite. Reduced lattice parameters in all crystallographic directions resulting from the rather low (1:180) substitution rate of copper for calcium was consistent with the higher ionic radius of the latter. The lower cationic hydration resulting from the partial Ca→Cu substitution facilitated the release of constitutive hydroxyls and lowered the energy of formation of TCP from the apatite precursor at elevated temperatures. Addition of copper thus effectively inhibited the formation of apatite as the secondary phase. The copper-doped cement exhibited an antibacterial effect, though exclusively against Gram-negative bacteria, including E. coli, P. aeruginosa and S. enteritidis. This antibacterial effect was due to copper ions, as demonstrated by an almost negligible antibacterial effect of the pure, copper-free cement. Also, the antibacterial activity of the copper-containing cement was significantly higher than that of its precursor powder. Since there was no significant difference between the kinetics of the release of copper from the precursor TCP powder and from the final, brushite phase of the hardened cement, this has suggested that the antibacterial effect was not solely due to copper ions, but due to the synergy between cationic copper and a particular phase and aggregation state of calcium phosphate. Though inhibitory to bacteria, the copper-doped cement increased the viability of human glial E297 cells, murine osteoblastic K7M2 cells and especially human primary lung fibroblasts. That this effect was also due to copper ions was evidenced by the null effect on viability increase exhibited by the copper-free cements. The difference in the mechanism of protection of dehydratases in prokaryotes and eukaryotes was used as a rationale for explaining the hereby evidenced selectivity in biological response. It presents the basis for the consideration of copper as a dually effective ion when synergized with calcium phosphates: toxic for bacteria and beneficial for the healthy cells.
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Affiliation(s)
- Julietta V Rau
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere, 100-00133 Rome, Italy.
| | - Victoria M Wu
- Department of Biomedical and Pharmaceutical Sciences, Center for Targeted Drug Delivery, Chapman University, Irvine, CA 92618-1908, USA
| | - Valerio Graziani
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere, 100-00133 Rome, Italy
| | - Inna V Fadeeva
- AA Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninsky prospect 49, 119991 Moscow, Russia
| | - Alexander S Fomin
- AA Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninsky prospect 49, 119991 Moscow, Russia
| | - Marco Fosca
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere, 100-00133 Rome, Italy
| | - Vuk Uskoković
- Department of Biomedical and Pharmaceutical Sciences, Center for Targeted Drug Delivery, Chapman University, Irvine, CA 92618-1908, USA.
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47
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Rodrigues AI, Reis RL, van Blitterswijk CA, Leonor IB, Habibović P. Calcium phosphates and silicon: exploring methods of incorporation. Biomater Res 2017; 21:6. [PMID: 28435697 PMCID: PMC5395800 DOI: 10.1186/s40824-017-0092-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 04/11/2017] [Indexed: 01/30/2023] Open
Abstract
Background Bioinorganics have been explored as additives to ceramic bone graft substitutes with the aim to improve their performance in repair and regeneration of large bone defects. Silicon (Si), an essential trace element involved in the processes related to bone formation and remodeling, was shown not only to enhance osteoblasts proliferation but also to stimulate the differentiation of mesenchymal stem cells (MSCs) and preosteoblasts into the osteogenic lineage. In this study, the added value of Si to calcium phosphate (CaP) coatings was evaluated. Methods Tissue culture plastic well plates were coated with a thin CaP layer to which traces amounts of Si were added, either by adsorption or by incorporation through coprecipitation. The physicochemical and structural properties of the coatings were characterized and the dissolution behavior was evaluated. The adsorption/incorporation of Si was successfully achieved and incorporated ions were released from the CaP coatings. Human MSCs were cultured on the coatings to examine the effects of Si on cell proliferation and osteogenic differentiation. For the statistical analysis, a one-way ANOVA with Bonferroni post-hoc test was performed. Results The results showed that human MSCs (hMSCs) responded to the presence of Si in the CaP coatings, in a dose-dependent manner. An increase in the expression of markers of osteogenic differentiation by human MSCs was observed as a result of the increase in Si concentration. Conclusions The incorporation/adsorption of Si into CaP coatings was successfully achieved and hMSCs responded with an increase in osteogenic genes expression with the increase of Si concentration. Furthermore, hMSCs cultured on CaP-I coatings expressed higher levels of ALP and OP, indicating that this may be the preferred method of incorporation of bioinorganics into CaPs.
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Affiliation(s)
- Ana I Rodrigues
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco GMR, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.,Department of Tissue Regeneration, MIRA Institute, University of Twente, Enschede, The Netherlands.,Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, PO Box 616, 6200 MD Maastricht, The Netherlands
| | - Rui L Reis
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco GMR, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Clemens A van Blitterswijk
- Department of Tissue Regeneration, MIRA Institute, University of Twente, Enschede, The Netherlands.,Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, PO Box 616, 6200 MD Maastricht, The Netherlands
| | - Isabel B Leonor
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco GMR, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Pamela Habibović
- Department of Tissue Regeneration, MIRA Institute, University of Twente, Enschede, The Netherlands.,Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, PO Box 616, 6200 MD Maastricht, The Netherlands
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Beijer NRM, Vasilevich AS, Pilavci B, Truckenmüller RK, Zhao Y, Singh S, Papenburg BJ, de Boer J. TopoWellPlate: A Well-Plate-Based Screening Platform to Study Cell-Surface Topography Interactions. ACTA ACUST UNITED AC 2017; 1:e1700002. [DOI: 10.1002/adbi.201700002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 02/08/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Nick R. M. Beijer
- Department of Cell Biology Inspired Tissue Engineering; MERLN Institute for Technology-Inspired Regenerative Medicine; Maastricht University; Universiteitssingel 40, Maastricht 6229 ER The Netherlands
| | - Aliaksei S. Vasilevich
- Department of Cell Biology Inspired Tissue Engineering; MERLN Institute for Technology-Inspired Regenerative Medicine; Maastricht University; Universiteitssingel 40, Maastricht 6229 ER The Netherlands
| | - Bayram Pilavci
- Department of Cell Biology Inspired Tissue Engineering; MERLN Institute for Technology-Inspired Regenerative Medicine; Maastricht University; Universiteitssingel 40, Maastricht 6229 ER The Netherlands
| | - Roman K. Truckenmüller
- Department of Complex Tissue Regeneration; MERLN Institute for Technology-Inspired Regenerative Medicine; Maastricht University; Universiteitssingel 40, Maastricht 6229 ER The Netherlands
| | - Yiping Zhao
- Materiomics BV; Oxfordlaan 70, Maastricht 6229 EV The Netherlands
| | - Shantanu Singh
- Imaging Platform; Broad institute of MIT and Harvard; 415 Main street, Cambridge MA 02142 USA
| | | | - Jan de Boer
- Department of Cell Biology Inspired Tissue Engineering; MERLN Institute for Technology-Inspired Regenerative Medicine; Maastricht University; Universiteitssingel 40, Maastricht 6229 ER The Netherlands
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Tunçay EÖ, Demirtaş TT, Gümüşderelioğlu M. Microwave-induced production of boron-doped HAp (B-HAp) and B-HAp coated composite scaffolds. J Trace Elem Med Biol 2017; 40:72-81. [PMID: 28159225 DOI: 10.1016/j.jtemb.2016.12.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 12/13/2016] [Accepted: 12/13/2016] [Indexed: 11/30/2022]
Abstract
The aim of the present study is to produce boron (B) doped hydroxyapatite (B-HAp), which has an osteoinductive property, and investigate in-vitro osteogenesis potential of B-HAp coated chitosan (B-HAp/Ch) scaffolds. At first, B-HAp was produced by the interaction of ions within the concentrated synthetic body fluid containing boron (B-SBF) with microwave energy. Boron incorporation into HAp structure was performed by the substitution of borate ions with phosphate and hydroxyl ions. Experiments were carried out with different microwave powers and exposure times, and optimum conditions for the production of B-HAp were determined. B-HAp precipitated from B-SBF by 600W microwave power has 1.15±0.11% (w/w) B, 1.40 (w/w) Ca/P ratio, 4.30±0.07% (w/w) carbonate content, 30±4nm rod-like morphology and bone-like amorphous structure. Then, chitosan scaffolds that were prepared by freeze-drying were coated with B-HAp by performing microwave-assisted precipitation in the presence of scaffolds to improve their bioactivities and mechanical properties. The formation of apatite layer and the penetration of apatites into the pores were observed by scanning electron microscopy (SEM). Fourier Transform Infrared spectroscopy (ATR-FTIR) and X-ray diffraction (XRD) analysis also confirmed the presence of B-HAp layer. As control, hydroxyapatite coated chitosan scaffolds (HAp/Ch) produced at the same conditions were used. The results of cell culture studies indicated that B releasing from scaffolds enhances proliferation and osteoblastic differentiation of MC3T3-E1 cells. This work emphasized the importance of the use of B within the scaffolds for enhancing in-vitro bone tissue engineering applications.
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Affiliation(s)
- Ekin Ö Tunçay
- Hacettepe University, Department of Bioengineering, Ankara, Turkey
| | - T Tolga Demirtaş
- Hacettepe University, Department of Bioengineering, Ankara, Turkey
| | - Menemşe Gümüşderelioğlu
- Hacettepe University, Department of Bioengineering, Ankara, Turkey; Hacettepe University, Department of Chemical Engineering, Ankara, Turkey.
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50
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Robinson L, Salma-Ancane K, Stipniece L, Meenan BJ, Boyd AR. The deposition of strontium and zinc Co-substituted hydroxyapatite coatings. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2017; 28:51. [PMID: 28197823 DOI: 10.1007/s10856-017-5846-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 01/04/2017] [Indexed: 06/06/2023]
Abstract
The in vitro and in vivo performance of hydroxyapatite (HAp) coatings can be modified by the addition of different trace ions, such as silicon (Si), lithium (Li), magnesium (Mg), zinc (Zn) or strontium (Sr) into the HAp lattice, to more closely mirror the complex chemistry of human bone. To date, most of the work in the literature has considered single ion-substituted materials and coatings, with limited reports on co-substituted calcium phosphate systems. The aim of this study was to investigate the potential of radio frequency magnetron sputtering to deposit Sr and Zn co-substituted HAp coatings using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The FTIR and XPS results highlight that all of the Sr, Zn and Sr-Zn co-substituted surfaces produced are all dehydroxylated and are calcium deficient. All of the coatings contained HPO42- groups, however; only the pure HAp coating and the Sr substituted HAp coating contained additional CO32- groups. The XRD results highlight that none of the coatings produced in this study contain any other impurity CaP phases, showing peaks corresponding to that of ICDD file #01-072-1243 for HAp, albeit shifted to lower 2θ values due to the incorporation of Sr into the HAp lattice for Ca (in the Sr and Sr-Zn co-substituted surfaces only). Therefore, the results here clearly show that RF magnetron sputtering offers a simple means to deliver Sr and Zn co-substituted HAp coatings with enhanced surface properties. (a) XRD patterns for RF magnetron sputter deposited hydroxyapatite coatings and (b)-(d) for Sr, Zn and Sr-Zn co-substituted coatings, respectively. The XPS spectra in (b) confirms the presence of a HA sputter deposited coating as opposed to
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Affiliation(s)
- L Robinson
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, University of Ulster, Shore Road, Newtownabbey, Co. Antrim, BT37 0QB, Northern Ireland, UK
| | - K Salma-Ancane
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, Riga, LV, 1007, Latvia
| | - L Stipniece
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, Riga, LV, 1007, Latvia
| | - B J Meenan
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, University of Ulster, Shore Road, Newtownabbey, Co. Antrim, BT37 0QB, Northern Ireland, UK
| | - A R Boyd
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, University of Ulster, Shore Road, Newtownabbey, Co. Antrim, BT37 0QB, Northern Ireland, UK.
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