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Nahmias Y, Yazbek Grobman G, Vidavsky N. Inhibiting Pathological Calcium Phosphate Mineralization: Implications for Disease Progression. ACS APPLIED MATERIALS & INTERFACES 2024; 16:18344-18359. [PMID: 38578869 DOI: 10.1021/acsami.3c17717] [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: 04/07/2024]
Abstract
Pathological calcifications, especially calcium phosphate microcalcifications (MCs), appear in most early breast cancer lesions, and their formation correlates with more aggressive tumors and a poorer prognosis. Hydroxyapatite (HA) is a key MC component that crystallizes in the tumor microenvironment. It is often associated with malignant breast cancer lesions and can trigger tumorigenesis in vitro. Here, we investigate the impact of additives on HA crystallization and inhibition, and how precancerous breast cells respond to minerals that are deposited in the presence of these additives. We show that nonstoichiometric HA spontaneously crystallizes in a solution simulating the tumor microenvironmental fluids and exhibits lump-like morphology similar to breast cancer MCs. In this system, the effectiveness of poly(aspartic acid) and poly(acrylic acid) (PAA) to inhibit HA is examined as a potential route to improve cancer prognosis. In the presence of additives, the formation of HA lumps is associated with the promotion or only minimal inhibition of mineralization, whereas the formation of amorphous calcium phosphate (ACP) lumps is followed by inhibition of mineralization. PAA emerges as a robust HA inhibitor by forming spherical ACP particles. When precancerous breast cells are exposed to various HA and ACP minerals, the most influential factors on cell proliferation are the mineral phase and whether the mineral is in the form of discrete particles or particle aggregates. The tumorigenic effects on cells, ranging from cytotoxicity and suppression of proliferation to triggering of proliferation, can be summarized as HA particles < HA aggregates < ACP particles < ACP aggregates. The cellular response to minerals can be attributed to a combination of factors, including mineral phase, crystallinity, morphology, surface texture, aggregation state, and surface potential. These findings have implications for understanding mineral-cell interactions within the tumor microenvironment and suggest that, in some cases, the byproducts of HA inhibition can contribute to disease progression more than HA itself.
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Affiliation(s)
- Yarden Nahmias
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel
| | - Gabriel Yazbek Grobman
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel
| | - Netta Vidavsky
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel
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Donnadio A, Bini M, Centracchio C, Mattarelli M, Caponi S, Ambrogi V, Pietrella D, Di Michele A, Vivani R, Nocchetti M. Bioinspired Reactive Interfaces Based on Layered Double Hydroxides-Zn Rich Hydroxyapatite with Antibacterial Activity. ACS Biomater Sci Eng 2021; 7:1361-1373. [PMID: 33739085 DOI: 10.1021/acsbiomaterials.0c01643] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work is focused on the preparation and multi-technique characterization of potentially biocompatible reactive interfaces obtained by combining layered double hydroxides (LDHs) and hydroxyapatite (HA). Antimicrobial and osteoinductive metallic ions as Zn2+ and Ga3+ were chosen as intralayer constituents of LDH to obtain ZnAl and ZnAlGa systems. These LDHs, exchanged with dihydrogenphosphate anions, promoted the precipitation of HA on the LDH surface yielding HA@LDH composites. X-ray diffraction quantitative analysis, through the Rietveld refinement method, coupled with elemental analysis and micro-Raman spectroscopy showed the formation of a mixed Ca-Zn HA phase. Scanning electron microscopy revealed that HA, in the presence of LDH, grew preferentially along its a-axis, thus crystallizing mainly in the form of flake crystals. LDH and HA@LDH composites showed antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa at not cytotoxic concentrations for human osteoblasts (hFob 1.19), especially when Ga cations were present in the LDH structure. The effect of the presence of HA in the composites on the bone-bonding ability and on human osteoblast proliferation was also investigated. The HA seemed to reduce the toxicity of the LDH toward human osteoblast while did not affect the bone-bonding ability. This multidisciplinary study provides the bio-chemical, structural characterization of new LDH and HA@LDH composites, evaluating also their bioactivity to be potentially applicable to titanium-based prostheses.
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Affiliation(s)
- Anna Donnadio
- Dipartimento di Scienze Farmaceutiche, Università di Perugia, Via del Liceo, 1, 06123 Perugia, Italy
| | - Marzia Bini
- Dipartimento di Scienze Farmaceutiche, Università di Perugia, Via del Liceo, 1, 06123 Perugia, Italy
| | - Catia Centracchio
- Dipartimento di Scienze Farmaceutiche, Università di Perugia, Via del Liceo, 1, 06123 Perugia, Italy
| | - Maurizio Mattarelli
- Dipartimento di Fisica e Geologia, Università di Perugia, Via A. Pascoli, I-06123 Perugia, Italy
| | - Silvia Caponi
- Istituto Officina dei Materiali, National Research Council (IOM-CNR), Unit of Perugia, c/o Department of Physics and Geology, University of Perugia, Via A. Pascoli, I-06123 Perugia, Italy
| | - Valeria Ambrogi
- Dipartimento di Scienze Farmaceutiche, Università di Perugia, Via del Liceo, 1, 06123 Perugia, Italy
| | - Donatella Pietrella
- Dipartimento di Medicina, Università di Perugia, Piazzale Gambuli, 1, 06132 Perugia, Italy
| | - Alessandro Di Michele
- Dipartimento di Fisica e Geologia, Università di Perugia, Via A. Pascoli, I-06123 Perugia, Italy
| | - Riccardo Vivani
- Dipartimento di Scienze Farmaceutiche, Università di Perugia, Via del Liceo, 1, 06123 Perugia, Italy
| | - Morena Nocchetti
- Dipartimento di Scienze Farmaceutiche, Università di Perugia, Via del Liceo, 1, 06123 Perugia, Italy
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Lu X, Kolzow J, Chen RR, Du J. Effect of solution condition on hydroxyapatite formation in evaluating bioactivity of B 2O 3 containing 45S5 bioactive glasses. Bioact Mater 2019; 4:207-214. [PMID: 31198889 PMCID: PMC6555879 DOI: 10.1016/j.bioactmat.2019.05.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 05/29/2019] [Accepted: 05/31/2019] [Indexed: 11/28/2022] Open
Abstract
The effects of testing solutions and conditions on hydroxyapatite (HAp) formation as a means of in vitro bioactivity evaluation of B2O3 containing 45S5 bioactive glasses were systematically investigated. Four glass samples prepared by the traditional melt and quench process, where SiO2 in 45S5 was gradually replaced by B2O3 (up to 30%), were studied. Two solutions: the simulated body fluid (SBF) and K2HPO4 solutions were used as the medium for evaluating in vitro bioactivity through the formation of HAp on glass surface as a function of time. It was found that addition of boron oxide delayed the HAp formation in both SBF and K2HPO4 solutions, while the reaction between glass and the K2HPO4 solution is much faster as compared to SBF. In addition to the composition and medium effects, we also studied whether the solution treatments (e.g., adjusting to maintain a pH of 7.4, refreshing solution at certain time interval, and no disturbance during immersion) affect HAp formation. Fourier transform infrared spectrometer (FTIR) equipped with an attenuated total reflection (ATR) sampling technique and scanning electron microscopy (SEM) were conducted to identify HAp formation on glass powder surfaces and to observe HAp morphologies, respectively. The results show that refreshing solution every 24 h produced the fastest HAp formation for low boron-containing samples when SBF was used as testing solution, while no significant differences were observed when K2HPO4 solution was used. This study thus suggests the testing solutions and conditions play an important role on the in vitro bioactivity testing results and should be carefully considered when study materials with varying bioactivities.
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Affiliation(s)
| | | | | | - Jincheng Du
- Department of Materials Science and Engineering, University of North Texas, Denton, TX, 76203, USA
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Ruiz GC, Cruz MA, Faria AN, Zancanela DC, Ciancaglini P, Ramos AP. Biomimetic collagen/phospholipid coatings improve formation of hydroxyapatite nanoparticles on titanium. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:102-110. [DOI: 10.1016/j.msec.2017.03.204] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 03/21/2017] [Accepted: 03/22/2017] [Indexed: 10/19/2022]
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Koju N, Sikder P, Ren Y, Zhou H, Bhaduri SB. Biomimetic coating technology for orthopedic implants. Curr Opin Chem Eng 2017. [DOI: 10.1016/j.coche.2016.11.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Islam MT, Felfel RM, Abou Neel EA, Grant DM, Ahmed I, Hossain KMZ. Bioactive calcium phosphate-based glasses and ceramics and their biomedical applications: A review. J Tissue Eng 2017; 8:2041731417719170. [PMID: 28794848 PMCID: PMC5524250 DOI: 10.1177/2041731417719170] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 06/15/2017] [Indexed: 01/15/2023] Open
Abstract
An overview of the formation of calcium phosphate under in vitro environment on the surface of a range of bioactive materials (e.g. from silicate, borate, and phosphate glasses, glass-ceramics, bioceramics to metals) based on recent literature is presented in this review. The mechanism of bone-like calcium phosphate (i.e. hydroxyapatite) formation and the test protocols that are either already in use or currently being investigated for the evaluation of the bioactivity of biomaterials are discussed. This review also highlights the effect of chemical composition and surface charge of materials, types of medium (e.g. simulated body fluid, phosphate-buffered saline and cell culture medium) and test parameters on their bioactivity performance. Finally, a brief summary of the biomedical applications of these newly formed calcium phosphate (either in the form of amorphous or apatite) is presented.
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Affiliation(s)
- Md Towhidul Islam
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Reda M Felfel
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham, UK
- Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Ensanya A Abou Neel
- Division of Biomaterials, Operative Dentistry Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
- Biomaterials Department, Faculty of Dentistry, Tanta University, Tanta, Egypt
- Biomaterials and Tissue Engineering Division, Eastman Dental Institute, University College London, London, UK
| | - David M Grant
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Ifty Ahmed
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Kazi M Zakir Hossain
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham, UK
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Dorozhkin SV. Calcium orthophosphates (CaPO 4): occurrence and properties. Prog Biomater 2015; 5:9-70. [PMID: 27471662 PMCID: PMC4943586 DOI: 10.1007/s40204-015-0045-z] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 11/05/2015] [Indexed: 01/02/2023] Open
Abstract
The present overview is intended to point the readers' attention to the important subject of calcium orthophosphates (CaPO4). This type of materials is of the special significance for the human beings because they represent the inorganic part of major normal (bones, teeth and antlers) and pathological (i.e., those appearing due to various diseases) calcified tissues of mammals. For example, atherosclerosis results in blood vessel blockage caused by a solid composite of cholesterol with CaPO4, while dental caries and osteoporosis mean a partial decalcification of teeth and bones, respectively, that results in replacement of a less soluble and harder biological apatite by more soluble and softer calcium hydrogenorthophosphates. Therefore, the processes of both normal and pathological calcifications are just an in vivo crystallization of CaPO4. Similarly, dental caries and osteoporosis might be considered as in vivo dissolution of CaPO4. In addition, natural CaPO4 are the major source of phosphorus, which is used to produce agricultural fertilizers, detergents and various phosphorus-containing chemicals. Thus, there is a great significance of CaPO4 for the humankind and, in this paper, an overview on the current knowledge on this subject is provided.
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Sang Cho J, Um SH, Su Yoo D, Chung YC, Hye Chung S, Lee JC, Rhee SH. Enhanced osteoconductivity of sodium-substituted hydroxyapatite by system instability. J Biomed Mater Res B Appl Biomater 2013; 102:1046-62. [DOI: 10.1002/jbm.b.33087] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2013] [Revised: 10/21/2013] [Accepted: 11/16/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Jung Sang Cho
- Interdisciplinary Program of Bioengineering; College of Engineering, Seoul National University; Seoul 152-742 Korea
| | - Seung-Hoon Um
- Department of Dental Biomaterials Science; Dental Research Institute and BK21 Plus; School of Dentistry; Seoul National University, Jongno; Seoul 110-749 Korea
| | - Dong Su Yoo
- Department of Materials Science and Engineering; Hanyang University; Seoul 133-791 Korea
| | - Yong-Chae Chung
- Department of Materials Science and Engineering; Hanyang University; Seoul 133-791 Korea
| | - Shin Hye Chung
- Department of Dental Biomaterials Science; Dental Research Institute and BK21 Plus; School of Dentistry; Seoul National University, Jongno; Seoul 110-749 Korea
| | - Jeong-Cheol Lee
- Department of Dental Biomaterials Science; Dental Research Institute and BK21 Plus; School of Dentistry; Seoul National University, Jongno; Seoul 110-749 Korea
| | - Sang-Hoon Rhee
- Interdisciplinary Program of Bioengineering; College of Engineering, Seoul National University; Seoul 152-742 Korea
- Department of Dental Biomaterials Science; Dental Research Institute and BK21 Plus; School of Dentistry; Seoul National University, Jongno; Seoul 110-749 Korea
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Adawy A, Abdel-Fattah WI. An efficient biomimetic coating methodology for a prosthetic alloy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 33:1813-8. [PMID: 23827641 DOI: 10.1016/j.msec.2012.12.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 11/09/2012] [Accepted: 12/17/2012] [Indexed: 10/27/2022]
Abstract
The combination of the load-bearing metallic implants with the bioactive materials in the design of synthetic implants is an important aspect in the biomaterials research. Biomimetic coating of bioinert alloys with calcium phosphate phases provides a good alternative to the prerequisite for the continual replacement of implants because of the failure of bone-implant integration. We attempted to accelerate the biomimetic coating process of stainless steel alloy (316L) with biomimetic apatite. In addition, we investigated the incorporation of functioning minerals such as strontianite and smithsonite into the deposited layer. In order to develop a highly mature apatite coating, our method requires soaking of the pre-treated alloy in highly concentrated synthetic body fluid for only few hours. Surface characterizations were performed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS). Also, the deposited apatitic layers were analysed by powder diffraction X-ray analysis (XRD). 316L surface showed the growth of highly crystalline, low carbonated hydroxyapatite, after only 6h of the whole soaking process.
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Affiliation(s)
- Alaa Adawy
- Physics Department, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt.
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Bae SE, Choi J, Joung YK, Park K, Han DK. Controlled release of bone morphogenetic protein (BMP)-2 from nanocomplex incorporated on hydroxyapatite-formed titanium surface. J Control Release 2012; 160:676-84. [PMID: 22543042 DOI: 10.1016/j.jconrel.2012.04.021] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 03/15/2012] [Accepted: 04/12/2012] [Indexed: 11/28/2022]
Abstract
Both osteoconductivity and osteoinductivity are equally very important aspects in a new bone formation and ultimately for bone regeneration. The purpose of this study was to create an environment, not only osteoconductive but also osteoinductive on titanium (Ti) surface. To do this bone morphogenetic protein-2 (BMP-2) nanocomplex (NC) was fabricated by using an ionic interaction between BMP-2 and chondroitin sulfate (CS). Meanwhile, Ti was chemically treated, then subjected to soaking in simulated body fluid (SBF), naming the sample Ti(C)-hydroxyapatite (HA). Once the BMP-2 NC was precipitated on the Ti(C)-HA surface, along with the addition of calcium/phosphate solution, the final product was formed as Ti(C)-HA-BMP-2. The size of NC was ranged from 150 to 250nm and the amount of CS was influential in determining both NC size and zeta potential. From the SEM observation, Ti surface was found nicely covered with the crystallized apatite layer that was identified using FTIR and NMR. The immobilized BMP-2 was released in a moderate rate for 4 weeks, without an initial burst of BMP-2. When mouse osteoblast cells were seeded on different Ti substrates, cell proliferation was faster in the Ti(C)-HA-BMP-2 group, as compared to other groups. The gene expression of bone-specific markers, osteocalcin and type I collagen, was significantly upregulated with the use of BMP-2 NC. The same result was witnessed in the measurement of alkaline phosphatase activity, in which the difference was statistically significant. This study demonstrated that the delivery system of BMP-2 NC was effective in holding BMP-2 on the apatite-coated Ti surface and that the Ti surface could be modified into the environment osteoinductive as well as osteoconductive.
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Affiliation(s)
- Soon Eon Bae
- Center for Biomaterials, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130‐650, Republic of Korea
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Dorozhkin SV. Calcium orthophosphates: occurrence, properties, biomineralization, pathological calcification and biomimetic applications. BIOMATTER 2011; 1:121-64. [PMID: 23507744 PMCID: PMC3549886 DOI: 10.4161/biom.18790] [Citation(s) in RCA: 145] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The present overview is intended to point the readers' attention to the important subject of calcium orthophosphates. This type of materials is of special significance for human beings, because they represent the inorganic part of major normal (bones, teeth and antlers) and pathological (i.e., those appearing due to various diseases) calcified tissues of mammals. For example, atherosclerosis results in blood vessel blockage caused by a solid composite of cholesterol with calcium orthophosphates, while dental caries and osteoporosis mean a partial decalcification of teeth and bones, respectively, that results in replacement of a less soluble and harder biological apatite by more soluble and softer calcium hydrogenphosphates. Therefore, the processes of both normal and pathological calcifications are just an in vivo crystallization of calcium orthophosphates. Similarly, dental caries and osteoporosis might be considered an in vivo dissolution of calcium orthophosphates. Thus, calcium orthophosphates hold a great significance for humankind, and in this paper, an overview on the current knowledge on this subject is provided.
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Jadalannagari S, More S, Kowshik M, Ramanan SR. Low temperature synthesis of hydroxyapatite nano-rods by a modified sol–gel technique. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2011.07.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Toskas G, Cherif C, Hund RD, Laourine E, Fahmi A, Mahltig B. Inorganic/organic (SiO₂)/PEO hybrid electrospun nanofibers produced from a modified sol and their surface modification possibilities. ACS APPLIED MATERIALS & INTERFACES 2011; 3:3673-3681. [PMID: 21859128 DOI: 10.1021/am200858s] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Ceramic silica (SiO(2)) hybrid nanofibers were prepared by electrospinning of solutions containing biocompatible polymer and modified silica precursors. The new hybrid nanofibers are based on polyethylene oxide (PEO) and a new solution of modified sol-gel particles of mixture containing tetraethoxysilane (TEOS) and 3-glycidyloxypropyltriethoxysilane (GPTEOS) in a weight ratio of 3:1. Adding high-molecular-weight PEO into the silica sol is found to enhance the formation of the silica nanofibers and leads to reduce the water-soluble carrying polymer down to 1.2%wt. Transmission electron microscopy (TEM) and attenuated total reflection fourier transformation infrared ATR-FTIR measurements are suggested that PEO is encapsulated by the silica component. This excellent formulation renders electrospinning of SiO(2) a robust process for an easy production of controllable silicate nanofibrous matrices. For instance, nanofibers with average diameter down to 400 nm are accessible by varying the weight ratio between the polymer and the inorganic precursor. These are reduced to 120 nm after the pyrolysis process. Moreover, the surface of the nanofibers could be easily modified, either by Al(3+) leading to aluminium silicate coatings, or by incorporation of Ca(2+) ions and subsequent bioactive hydroxyl carbonate apatite (HAP) formation. These hybrid silica nanofibers are possess a unique collective properties can have a great impact either in high-temperature reinforced materials and filtration or in biomedical applications such as in dentistry and bone tissue engineering.
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Affiliation(s)
- Georgios Toskas
- Institute of Textile Machinery and High Performance Material Technology (ITM), Technische Universität Dresden, Hohestrasse 6, 01069 Dresden, Germany.
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Shin US, Yoon IK, Lee GS, Jang WC, Knowles JC, Kim HW. Carbon nanotubes in nanocomposites and hybrids with hydroxyapatite for bone replacements. J Tissue Eng 2011; 2011:674287. [PMID: 21776341 PMCID: PMC3138058 DOI: 10.4061/2011/674287] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Accepted: 03/28/2011] [Indexed: 11/20/2022] Open
Abstract
Hydroxyapatite (HA), as a bone mineral component, has been an attractive bioceramic for the reconstruction of hard tissues. However, its poor mechanical properties, including low fracture toughness and tensile strength, have been a significant challenge to the application of HA for the replacement of load-bearing and/or large bone defects. Among materials studied to reinforce HA, carbon nanotubes (CNTs: single-walled or multiwalled) have recently gained significant attention because of their unprecedented mechanical properties (high strength and toughness) and physicochemical properties (high surface area, electrical and thermal conductivity, and low weight). Here, we review recent studies of the organization of HA-CNTs at the nanoscale, with a particular emphasis on the functionalization of CNTs and their dispersion within an HA matrix and induction of HA mineralization. The organization of CNTs and HA implemented at the nanoscale can further be developed in the form of coatings, nanocomposites, and hybrid powders to enable potential applications in hard tissue reconstruction.
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Affiliation(s)
- Ueon Sang Shin
- Department of Nanobiomedical Science & WCU Research Center, Dankook University Graduate School, Cheonan 330-714, Republic of Korea
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Zhou H, Touny AH, Bhaduri SB. Fabrication of novel PLA/CDHA bionanocomposite fibers for tissue engineering applications via electrospinning. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1183-1193. [PMID: 21431905 DOI: 10.1007/s10856-011-4295-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Accepted: 03/14/2011] [Indexed: 05/30/2023]
Abstract
The main theme here is to fabricate PLA (poly lactic-acid)/CDHA (carbonated calcium deficient hydroxyapatite) bionanocomposites, where both the constituents are biocompatible and biodegradable with one dimension in nanometer scale. Such materials are important in tissue engineering applications. The bionanocomposite fibers were fabricated via electrospinning. There are two important signatures of this paper. First, CDHA, rather than HA, is added to PLA as the second phase. As opposed to HA, CDHA mimics the bone mineral composition better and is biodegradable. Therefore, PLA/CDHA fibers should have better biodegradability while maintaining a physiological pH during degradation. To the best of our knowledge, this is the first attempt of electrospinning of such a composite. Second, the CDHA nanoparticles were synthesized using the benign low temperature biomimetic technique, the only route available for the retention of carbonate ions in the HA lattice. The structural properties, degradation behavior, bioactivity, cell adhesion, and growth capability of as-fabricated PLA/CDHA bionanocomposites were investigated. The results show that the incorporation of CDHA decreased PLA fiber diameters, accelerated PLA degradation, buffered pH decrease caused by PLA degradation, improved the bioactivity and biocompatibility of the scaffold. These results prove that PLA/CDHA bionanocomposites have the potential in tissue regeneration applications.
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Affiliation(s)
- Huan Zhou
- Department of Bioengineering, The University of Toledo, Toledo, OH, USA.
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Abstract
The present overview is intended to point the readers’ attention to the important subject of calcium orthophosphates. These materials are of the special significance because they represent the inorganic part of major normal (bones, teeth and dear antlers) and pathological (i.e. those appearing due to various diseases) calcified tissues of mammals. Due to a great chemical similarity with the biological calcified tissues, many calcium orthophosphates possess remarkable biocompatibility and bioactivity. Materials scientists use this property extensively to construct artificial bone grafts that are either entirely made of or only surface-coated with the biologically relevant calcium ortho-phosphates. For example, self-setting hydraulic cements made of calcium orthophosphates are helpful in bone repair, while titanium substitutes covered by a surface layer of calcium orthophosphates are used for hip joint endoprostheses and as tooth substitutes. Porous scaffolds made of calcium orthophosphates are very promising tools for tissue engineering applications. In addition, technical grade calcium orthophosphates are very popular mineral fertilizers. Thus ere calcium orthophosphates are of great significance for humankind and, in this paper, an overview on the current knowledge on this subject is provided.
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Chen X, Li Y, Hodgson PD, Wen C. Microstructures and bond strengths of the calcium phosphate coatings formed on titanium from different simulated body fluids. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2008.06.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Santos MH, Heneine LGD, Mansur HS. Synthesis and characterization of calcium phosphate/collagen biocomposites doped with Zn2+. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2008. [DOI: 10.1016/j.msec.2007.07.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Matsumura K, Hyon SH, Nakajima N, Tsutsumi S. Effects on gingival cells of hydroxyapatite immobilized on poly(ethylene-co-vinyl alcohol). J Biomed Mater Res A 2007; 82:288-95. [PMID: 17274027 DOI: 10.1002/jbm.a.31128] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Hydroxyapatite was immobilized on poly(ethylene-co-vinyl alcohol) (EVA) by alternate soaking in aqueous CaCl(2) and Na(2)HPO(4) solutions, followed by carboxyl groups introduction through ozone exposure in order to investigate the nature of the gingival cells, to control their proliferation and properties and to develop a highly organized hybrid implant possessing periodontium. Human gingival cells were cultured on the ozone-exposed EVA, collagen-immobilized EVA, hydroxyapatite-immobilized EVA, and a conventional tissue culture dish. Cell proliferation was highest on the tissue culture dish and lowest on the hydroxyapatite-immobilized EVA. The results of RT-PCR of gingival cells on hydroxyapatite-immobilized EVA shows that mRNAs expressed in bone and periodontal ligament were determined. Furthermore, alkaline phosphatase activity and ELISA assay revealed that gingival cells acquired the osteoblastic properties when cultured on hydroxyapatite-immobilized EVA, suggesting that the periodontium might be regenerated around implants using gingival cells.
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Affiliation(s)
- Kazuaki Matsumura
- Institute for Frontier Medical Sciences, Kyoto University, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
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Zheng C, Li S, Tao X, Hao Y, Yang R, Zhang L. Calcium phosphate coating of Ti–Nb–Zr–Sn titanium alloy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2007. [DOI: 10.1016/j.msec.2006.09.021] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
Porous HA/β-TCP biphasic calcium phosphate (BCP) bioceramics were prepared by microwave plasma in order to solve the problems on sintering of Ca-P bioceramics by a conventional furnace. The plasma-sintered samples exhibit a higher densification rate, smaller grain size and higher compressive strength compared to those of conventional sintered samples. The [Ca2+] concentration and
the dissolution rate are also higher than those of conventional sintered samples in physiological saline. After immersed in simulated body fluid (SBF) and simulated inflammation body fluid, the amount of bone-like apatite formed on plasma-sintered samples is more than that formed on conventional sintered samples. The results indicate that plasma sintered porous BCP bioceramics have better mechanical
properties and may also have better biological properties. On the other hand, the surface of samples that underwent a simulated inflammation procedure is smoother and the amount of bone-like apatite formed on them is less than that formed on the samples immersed in normal SBF all the time, which may indicate that the light acid in an inflammation response would affect the bone reconstruction when Ca-P bioceramics implanted in living body.
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Jalota S, Bhaduri SB, Tas AC. Effect of carbonate content and buffer type on calcium phosphate formation in SBF solutions. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2006; 17:697-707. [PMID: 16897162 DOI: 10.1007/s10856-006-9680-1] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2004] [Accepted: 10/24/2005] [Indexed: 05/11/2023]
Affiliation(s)
- S Jalota
- School of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USA
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Herschke L, Rottstegge J, Lieberwirth I, Wegner G. Zinc phosphate as versatile material for potential biomedical applications Part 1. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2006; 17:81-94. [PMID: 16389475 DOI: 10.1007/s10856-006-6332-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2004] [Accepted: 05/09/2005] [Indexed: 05/06/2023]
Abstract
Synthetic alpha - and beta -Hopeite, two polymorphs of zinc phosphate tetrahydrates (ZPT) have been synthesized by hydrothermal crystallization from aqueous solution at 20 degrees C and 90 degrees C respectively. Aside from their sub-title crystallographic differences originating from a unique hydrogen bonding pattern, their thermodynamic interrelation has been thoroughfully investigated by means of X-Ray diffraction (XRD) and differential scanning calorimetry (DSC), combined with thermogravimetry (TGA-MS). Using a new heterogeneous step-reaction approach, the kinetics of dehydration of the two forms of ZPT was studied and their corresponding transition temperature determined. Low temperature DRIFT, FT-Raman and (1)H, (31)P MAS-NMR reveal an oriented distortion of the zinc phosphate tetrahedra, due to a characteristic hydrogen bonding pattern and in accordance with the molecular tetrahedral linkage scheme of the phosphate groups. Biogenic Hydroxyapatite (HAP) and one of its metastable precursors, a calcium dihydrogen phosphate dihydrate (DCPD) or Brushite were also obtained and used to underline the resulting variations of chemical reactivity in zinc phosphates.
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Affiliation(s)
- L Herschke
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany.
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Bigi A, Boanini E, Bracci B, Facchini A, Panzavolta S, Segatti F, Sturba L. Nanocrystalline hydroxyapatite coatings on titanium: a new fast biomimetic method. Biomaterials 2005; 26:4085-9. [PMID: 15664635 DOI: 10.1016/j.biomaterials.2004.10.034] [Citation(s) in RCA: 138] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2004] [Accepted: 10/14/2004] [Indexed: 10/26/2022]
Abstract
We obtained a fast biomimetic deposition of hydroxyapatite (HA) coatings on Ti6Al4V substrates using a slightly supersaturated Ca/P solution, with an ionic composition simpler than that of simulated body fluid (SBF). At variance with other fast deposition methods, which produce amorphous calcium phosphate coatings, the new proposed composition allows one to obtain nanocrystalline HA. Soaking in supersaturated Ca/P solution results in the deposition of a uniform coating in a few hours, whereas SBF, or even 1.5SBF, requires 14 days to deposit a homogeneous coating on the same substrates. The coating consists of HA globular aggregates, which exhibit a finer lamellar structure than those deposited from SBF. The extent of deposition increases on increasing the immersion time. Transmission electron microscope (TEM) images recorded on the material detached from the coating show that the deposition is constituted of thin nanocrystals. Electron diffraction (ED) patterns recorded from most of the crystals exhibit the presence of rings, which can be indexed as reflections characteristic of HA. Furthermore, several HA single-crystal spot ED images were obtained from individual crystals.
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Affiliation(s)
- Adriana Bigi
- Department of Chemistry "G. Ciamician", University of Bologna, via Selmi, 2, 40126 Bologna, Italy.
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Abstract
Dense, polycrystalline, synthetic hydroxyapatite (HA) was incubated for 36 days in modified simulated body fluid (SBF) with increased HCO3
- and reduced Cl- ion concentrations (27 and 120 mM, respectively) closer to actual blood plasma than typical SBF. The resulting precipitated apatite layer was characterized by X-ray photoelectron spectroscopy (XPS) and contact angle measurements and found to be nonstoichiometric, calcium deficient (Ca/P~1.06),
non-carbonate containing, and of intermediate hydrophilicity (advancing contact angle, qa=76.5±1.3°). The nanoscale surface topography of the SBF-incubated HA sample was imaged by tapping mode atomic force microscopy (TMAFM), observed to be ≤100 nm in thickness, and composed of three distinct morphologies. These topographically distinct regions were localized within individual grains and facets of the initial HA surface and included: hemispherical, globular structures (maximum lateral dimension, d=44.7±12.7 nm, peak-tovalley height, h=3.6±2.7 nm); elongated, needle-like structures (minimum lateral dimension, w=31.0±8.5 nm, d=104.4±31.1 nm, h=5.0±3.2 nm), and regions of larger, irregularly shaped
structures that were relatively smooth (d=504.9±219.1 nm, h=104.0±51.7 nm).
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Renke-Gluszko M, El Fray M. The effect of simulated body fluid on the mechanical properties of multiblock poly(aliphatic/aromatic-ester) copolymers. Biomaterials 2004; 25:5191-8. [PMID: 15109843 DOI: 10.1016/j.biomaterials.2003.12.021] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2003] [Accepted: 12/07/2003] [Indexed: 11/22/2022]
Abstract
The effects of simulated body fluid (SBF) on the surface and mechanical properties of poly(aliphatic/aromatic-ester) (PED) copolymers were investigated. PED copolymers containing different hard (aromatic) and soft (aliphatic) segment weight ratios were exposed to SBF for 52 days, and afterwards their mechanical properties were evaluated. A quasi-static tensile test estimating relaxation and fatigue properties from the hysteresis method was performed. The surface properties were monitored with scanning electron microscopy and energy-dispersive X-ray spectrometry. PED copolymers showed various susceptibilities to apatite layer formation on the surface. This was ascribed to the hard/soft segment ratios of PED materials. Polymers containing higher amounts of amorphous soft segments showed a better deposition with the apatite layer, which provided improved mechanical properties, especially fatigue (improved dynamic creep resistance).
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