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Yuan X, Xu Y, Lu T, He F, Zhang L, He Q, Ye J. Enhancing the bioactivity of hydroxyapatite bioceramic via encapsulating with silica-based bioactive glass sol. J Mech Behav Biomed Mater 2022; 128:105104. [DOI: 10.1016/j.jmbbm.2022.105104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/17/2022] [Accepted: 01/23/2022] [Indexed: 10/19/2022]
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Synthesis, Drug Release, and Antibacterial Properties of Novel Dendritic CHX-SrCl 2 and CHX-ZnCl 2 Particles. Pharmaceutics 2021; 13:pharmaceutics13111799. [PMID: 34834214 PMCID: PMC8625704 DOI: 10.3390/pharmaceutics13111799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/15/2021] [Accepted: 10/23/2021] [Indexed: 12/29/2022] Open
Abstract
This work demonstrated for the first time the synthesis of novel chlorhexidine particles containing strontium and zinc, to provide an effective, affordable, and safe intervention in the treatment of recurrent infections found in Medicine and Dentistry. The CHX-SrCl2 and CHX-ZnCl2 particles were synthesized by co-precipitation of chlorhexidine diacetate (CHXD) and zinc chloride or strontium chloride, where particle size was manipulated by controlling processing time and temperature. The CHX-ZnCl2 and CHX-SrCl2 particles were characterized using SEM, FTIR, and XRD. UV-Vis using artificial saliva (pH 4 and pH 7) was used to measure the drug release and ICP-OES ion release. The antibacterial properties were examined against P. gingivalis, A. actinomycetemcomitans, and F. nucleatum subsp. Polymorphum, and cytotoxicity was evaluated using mouse fibroblast L929 cells. The novel particles were as safe as commercial CHXD, with antibacterial activity against a range of oral pathogens. UV-Vis results run in artificial saliva (pH 4 and pH 7) indicated a higher release rate in acidic rather than neutral conditions. The CHX-ZnCl2 particles provided the functionality of a smart Zinc and CHX release, with respect to environmental pH, allowing responsive antibacterial applications in the field of medicine and dentistry.
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Talabani RM, Garib BT, Masaeli R, Zandsalimi K, Ketabat F. Biomineralization of three calcium silicate-based cements after implantation in rat subcutaneous tissue. Restor Dent Endod 2021; 46:e1. [PMID: 33680890 PMCID: PMC7906840 DOI: 10.5395/rde.2021.46.e1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 07/22/2020] [Accepted: 08/07/2020] [Indexed: 01/07/2023] Open
Abstract
Objectives The aim of this study was to evaluate the dystrophic mineralization deposits from 3 calcium silicate-based cements (Micro-Mega mineral trioxide aggregate [MM-MTA], Biodentine [BD], and EndoSequence Root Repair Material [ESRRM] putty) over time after subcutaneous implantation into rats. Materials and Methods Forty-five silicon tubes containing the tested materials and 15 empty tubes (serving as a control group) were subcutaneously implanted into the backs of 15 Wistar rats. At 1, 4, and 8 weeks after implantation, the animals were euthanized (n = 5 animals/group), and the silicon tubes were removed with the surrounding tissues. Histopathological tissue sections were stained with von Kossa stain to assess mineralization. Scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM/EDX) were also used to assess the chemical components of the surface precipitates deposited on the implant and the pattern of calcium and phosphorus distribution at the material-tissue interface. The calcium-to-phosphorus ratios were compared using the non-parametric Kruskal-Wallis test at a significance level of 5%. Results The von Kossa staining showed that both BD and ESRRM putty induced mineralization starting at week 1; this mineralization increased further until the end of the study. In contrast, MM-MTA induced dystrophic calcification later, from 4 weeks onward. SEM/EDX showed no statistically significant differences in the calcium- and phosphorus-rich areas among the 3 materials at any time point (p > 0.05). Conclusions After subcutaneous implantation, biomineralization of the 3-calcium silicate-based cements started early and increased over time, and all 3 tested cements generated calcium- and phosphorus-containing surface precipitates.
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Affiliation(s)
| | | | - Reza Masaeli
- Department of Dental Biomaterial, Tehran University of Medical Sciences, Tehran, Iran
| | - Kavosh Zandsalimi
- Department of Life Sciences Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Farinaz Ketabat
- Division of Biomedical Engineering, University of Saskatchewan, Saskatoon, Canada
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Sergi R, Bellucci D, Salvatori R, Cannillo V. Chitosan-Based Bioactive Glass Gauze: Microstructural Properties, In Vitro Bioactivity, and Biological Tests. MATERIALS 2020; 13:ma13122819. [PMID: 32585873 PMCID: PMC7344553 DOI: 10.3390/ma13122819] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/15/2020] [Accepted: 06/19/2020] [Indexed: 01/19/2023]
Abstract
Passive commercial gauzes were turned into interactive wound dressings by impregnating them with a chitosan suspension. To further improve healing, and cell adhesion and proliferation, chitosan/bioactive glass wound dressings were produced with the addition of (i) 45S5, (ii) a Sr- and Mg-containing bioactive glass, and (iii) a Zn-containing bioactive glass to the chitosan suspension. SEM and FTIR analyses evidenced positive results in terms of incorporation of bioactive glass particles. Bioactivity was investigated by soaking chitosan-based bioactive glass wound dressings in simulated body fluid (SBF). Cell viability, proliferation, and morphology were investigated using NIH 3T3 (mouse embryonic fibroblast) cells by neutral red (NR) uptake and MTT assays. Furthermore, the wound-healing rate was evaluated by means of the scratch test, using NIH 3T3. The results showed that bioactive glass particles enhance cell adhesion and proliferation, and wound healing compared to pure chitosan. Therefore, chitosan-based bioactive glass wound dressings combine the properties of the organic matrix with the specific biological characteristics of bioactive glasses to achieve chitosan composites suitable for healing devices.
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Affiliation(s)
- Rachele Sergi
- Dipartimento di Ingegneria Enzo Ferrari, Università degli Studi di Modena e Reggio Emilia, Via P. Vivarelli 10, 41125 Modena, Italy; (R.S.); (D.B.)
| | - Devis Bellucci
- Dipartimento di Ingegneria Enzo Ferrari, Università degli Studi di Modena e Reggio Emilia, Via P. Vivarelli 10, 41125 Modena, Italy; (R.S.); (D.B.)
| | - Roberta Salvatori
- Laboratorio dei Biomateriali, Dipartimento di Scienze Mediche Chirurgiche Materno-Infantili e dell’Adulto, Università di Modena e Reggio Emilia, Via Campi 213/A, 41125 Modena, Italy;
| | - Valeria Cannillo
- Dipartimento di Ingegneria Enzo Ferrari, Università degli Studi di Modena e Reggio Emilia, Via P. Vivarelli 10, 41125 Modena, Italy; (R.S.); (D.B.)
- Correspondence: ; Tel.: +39-059-2056240
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Terzopoulou Z, Baciu D, Gounari E, Steriotis T, Charalambopoulou G, Tzetzis D, Bikiaris D. Composite Membranes of Poly(ε-caprolactone) with Bisphosphonate-Loaded Bioactive Glasses for Potential Bone Tissue Engineering Applications. Molecules 2019; 24:E3067. [PMID: 31450742 PMCID: PMC6749304 DOI: 10.3390/molecules24173067] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/16/2019] [Accepted: 08/21/2019] [Indexed: 12/11/2022] Open
Abstract
Poly(ε-caprolactone) (PCL) is a bioresorbable synthetic polyester with numerous biomedical applications. PCL membranes show great potential in guided tissue regeneration because they are biocompatible, occlusive and space maintaining, but lack osteoconductivity. Therefore, two different types of mesoporous bioactive glasses (SiO2-CaO-P2O5 and SiO2-SrO-P2O5) were synthesized and incorporated in PCL thin membranes by spin coating. To enhance the osteogenic effect of resulting membranes, the bioglasses were loaded with the bisphosphonate drug ibandronate prior to their incorporation in the polymeric matrix. The effect of the composition of the bioglasses as well as the presence of absorbed ibandronate on the physicochemical, cell attachment and differentiation properties of the PCL membranes was evaluated. Both fillers led to a decrease of the crystallinity of PCL, along with an increase in its hydrophilicity and a noticeable increase in its bioactivity. Bioactivity was further increased in the presence of a Sr substituted bioglass loaded with ibandronate. The membranes exhibited excellent biocompatibility upon estimation of their cytotoxicity on Wharton's Jelly Mesenchymal Stromal Cells (WJ-SCs), while they presented higher osteogenic potential in comparison with neat PCL after WJ-SCs induced differentiation towards bone cells, which was enhanced by a possible synergistic effect of Sr and ibandronate.
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Affiliation(s)
- Zoi Terzopoulou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR54124 Thessaloniki, Central Macedonia, Greece.
| | - Diana Baciu
- National Center for Scientific Research "Demokritos", GR15341 Athens, Ag. Paraskevi Attikis, Greece
| | - Eleni Gounari
- Biohellenika Biotechnology Company, Leoforos Georgikis Scholis 65, GR57001 Thessaloniki, Central Macedonia, Greece
| | - Theodore Steriotis
- National Center for Scientific Research "Demokritos", GR15341 Athens, Ag. Paraskevi Attikis, Greece
| | - Georgia Charalambopoulou
- National Center for Scientific Research "Demokritos", GR15341 Athens, Ag. Paraskevi Attikis, Greece
| | - Dimitrios Tzetzis
- School of Science and Technology, International Hellenic University, GR57001 Thermi, Central Macedonia, Greece
| | - Dimitrios Bikiaris
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR54124 Thessaloniki, Central Macedonia, Greece
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Kargozar S, Montazerian M, Fiume E, Baino F. Multiple and Promising Applications of Strontium (Sr)-Containing Bioactive Glasses in Bone Tissue Engineering. Front Bioeng Biotechnol 2019; 7:161. [PMID: 31334228 PMCID: PMC6625228 DOI: 10.3389/fbioe.2019.00161] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 06/20/2019] [Indexed: 12/22/2022] Open
Abstract
Improving and accelerating bone repair still are partially unmet needs in bone regenerative therapies. In this regard, strontium (Sr)-containing bioactive glasses (BGs) are highly-promising materials to tackle this challenge. The positive impacts of Sr on the osteogenesis makes it routinely used in the form of strontium ranelate (SR) in the clinical setting, especially for patients suffering from osteoporosis. Therefore, a large number of silicate-, borate-, and phosphate-based BGs doped with Sr and produced in different shapes have been developed and characterized, in order to be used in the most advanced therapeutic strategies designed for the management of bone defects and injuries. Although the influence of Sr incorporation in the glass is debated regarding the obtained physicochemical and mechanical properties, the biological improvements have been found to be substantial both in vitro and in vivo. In the present study, we provide a comprehensive overview of Sr-containing glasses along with the current state of their clinical use. For this purpose, different types of Sr-doped BG systems are described, including composites, coatings and porous scaffolds, and their applications are discussed in the light of existing experimental data along with the significant challenges ahead.
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Affiliation(s)
- Saeid Kargozar
- Tissue Engineering Research Group (TERG), Department of Anatomy and Cell Biology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maziar Montazerian
- Center for Research, Technology and Education in Vitreous Materials, Federal University of São Carlos, São Carlos, Brazil
| | - Elisa Fiume
- Department of Applied Science and Technology, Institute of Materials Physics and Engineering, Politecnico di Torino, Turin, Italy
| | - Francesco Baino
- Department of Applied Science and Technology, Institute of Materials Physics and Engineering, Politecnico di Torino, Turin, Italy
- Interuniversity Center for the Promotion of the 3Rs Principles in Teaching and Research, Italy
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Kargozar S, Hamzehlou S, Baino F. Can bioactive glasses be useful to accelerate the healing of epithelial tissues? MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 97:1009-1020. [DOI: 10.1016/j.msec.2019.01.028] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 12/27/2018] [Accepted: 01/07/2019] [Indexed: 11/28/2022]
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Fernandes HR, Gaddam A, Rebelo A, Brazete D, Stan GE, Ferreira JMF. Bioactive Glasses and Glass-Ceramics for Healthcare Applications in Bone Regeneration and Tissue Engineering. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E2530. [PMID: 30545136 PMCID: PMC6316906 DOI: 10.3390/ma11122530] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 12/04/2018] [Accepted: 12/06/2018] [Indexed: 12/12/2022]
Abstract
The discovery of bioactive glasses (BGs) in the late 1960s by Larry Hench et al. was driven by the need for implant materials with an ability to bond to living tissues, which were intended to replace inert metal and plastic implants that were not well tolerated by the body. Among a number of tested compositions, the one that later became designated by the well-known trademark of 45S5 Bioglass® excelled in its ability to bond to bone and soft tissues. Bonding to living tissues was mediated through the formation of an interfacial bone-like hydroxyapatite layer when the bioglass was put in contact with biological fluids in vivo. This feature represented a remarkable milestone, and has inspired many other investigations aiming at further exploring the in vitro and in vivo performances of this and other related BG compositions. This paradigmatic example of a target-oriented research is certainly one of the most valuable contributions that one can learn from Larry Hench. Such a goal-oriented approach needs to be continuously stimulated, aiming at finding out better performing materials to overcome the limitations of the existing ones, including the 45S5 Bioglass®. Its well-known that its main limitations include: (i) the high pH environment that is created by its high sodium content could turn it cytotoxic; (ii) and the poor sintering ability makes the fabrication of porous three-dimensional (3D) scaffolds difficult. All of these relevant features strongly depend on a number of interrelated factors that need to be well compromised. The selected chemical composition strongly determines the glass structure, the biocompatibility, the degradation rate, and the ease of processing (scaffolds fabrication and sintering). This manuscript presents a first general appraisal of the scientific output in the interrelated areas of bioactive glasses and glass-ceramics, scaffolds, implant coatings, and tissue engineering. Then, it gives an overview of the critical issues that need to be considered when developing bioactive glasses for healthcare applications. The aim is to provide knowledge-based tools towards guiding young researchers in the design of new bioactive glass compositions, taking into account the desired functional properties.
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Affiliation(s)
- Hugo R Fernandes
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Anuraag Gaddam
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Avito Rebelo
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Daniela Brazete
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - George E Stan
- National Institute of Materials Physics, RO-077125 Magurele, Romania.
| | - José M F Ferreira
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
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Koç Demir A, Elçin AE, Elçin YM. Strontium-modified chitosan/montmorillonite composites as bone tissue engineering scaffold. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 89:8-14. [DOI: 10.1016/j.msec.2018.03.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 02/16/2018] [Accepted: 03/21/2018] [Indexed: 10/17/2022]
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Rodriguez O, Stone W, Schemitsch EH, Zalzal P, Waldman S, Papini M, Towler MR. Titanium addition influences antibacterial activity of bioactive glass coatings on metallic implants. Heliyon 2017; 3:e00420. [PMID: 29034340 PMCID: PMC5635952 DOI: 10.1016/j.heliyon.2017.e00420] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 07/24/2017] [Accepted: 09/24/2017] [Indexed: 11/19/2022] Open
Abstract
In an attempt to combat the possibility of bacterial infection and insufficient bone growth around metallic, surgical implants, bioactive glasses may be employed as coatings. In this work, silica-based and borate-based glass series were synthesized for this purpose and subsequently characterized in terms of antibacterial behavior, solubility and cytotoxicity. Borate-based glasses were found to exhibit significantly superior antibacterial properties and increased solubility compared to their silica-based counterparts, with BRT0 and BRT3 (borate-based glasses with 0 and 15 mol% of titanium dioxide incorporated, respectively) outperforming the remainder of the glasses, both borate and silicate based, in these respects. Atomic Absorption Spectroscopy confirmed the release of zinc ions (Zn2+), which has been linked to the antibacterial abilities of glasses SRT0, BRT0 and BRT3, with inhibition effectively achieved at concentrations lower than 0.7 ppm. In vitro cytotoxicity studies using MC3T3-E1 osteoblasts confirmed that cell proliferation was affected by all glasses in this study, with decreased proliferation attributed to a faster release of sodium ions over calcium ions in both glass series, factor known to slow cell proliferation in vitro.
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Affiliation(s)
- Omar Rodriguez
- Department of Mechanical & Industrial Engineering, Ryerson University, Toronto M5B 2K3, Ontario, Canada
- St. Michael’s Hospital, Toronto M5B 1W8, Ontario, Canada
- Corresponding author at:
| | - Wendy Stone
- Department of Chemistry and Biology, Ryerson University, Toronto M5B 2K3, Ontario, Canada
| | - Emil H. Schemitsch
- St. Michael’s Hospital, Toronto M5B 1W8, Ontario, Canada
- Department of Surgery, University of Western Ontario, London, ON N6A 4V2, Canada
| | - Paul Zalzal
- Oakville Trafalgar Memorial Hospital, Oakville L6J 3L7, Ontario, Canada
- Faculty of Health Sciences, Department of Surgery, McMaster University, Hamilton L8S 4L8, Ontario, Canada
| | - Stephen Waldman
- St. Michael’s Hospital, Toronto M5B 1W8, Ontario, Canada
- Department of Chemical Engineering, Ryerson University, Toronto M5B 2K3, Ontario, Canada
| | - Marcello Papini
- Department of Mechanical & Industrial Engineering, Ryerson University, Toronto M5B 2K3, Ontario, Canada
| | - Mark R. Towler
- Department of Mechanical & Industrial Engineering, Ryerson University, Toronto M5B 2K3, Ontario, Canada
- St. Michael’s Hospital, Toronto M5B 1W8, Ontario, Canada
- Department of Biomedical Engineering, University of Malaya, Kuala Lumpur, Malaysia
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Klein M, Laschke MW, Holstein JH, Histing T, Pohlemann T, Menger MD, Garcia P. Mechanical and biological characterization of alkaline substituted orthophosphate bone substitutes containing meta- and diphosphates. ACTA ACUST UNITED AC 2017; 12:055007. [PMID: 28691695 DOI: 10.1088/1748-605x/aa7e80] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Despite the growing knowledge on the mechanisms of fracture healing, bone defects often do not heal in a timely manner. Clinically, tricalcium phosphate (TCP) bone substitutes are used to fill bone defects and promote bone healing. However, the degradation rate of these implants is often too slow for sufficient bone replacement. The use of calcium phosphate material with the crystalline phase Ca10[K/Na](PO4)7 containing different amounts of di- and metaphosphates may overcome this problem, because these materials show an accelerated degradation. Therefore, we generated alkaline substituted Ca-P scaffolds with different amounts of ortho-, di- and metaphosphates. The degradation of these materials was analyzed in TRIS-HCl buffer solution in vitro. Moreover, we measured the compressive strength and porosity of the scaffolds by micro-CT analysis. The biocompatibility of the scaffolds was evaluated in vivo in the mouse dorsal skinfold chamber by means of intravital fluorescence microscopy and histology. We found that higher amounts of incorporated di- and metaphosphates increase the degradation rate and compressive strength of the scaffolds without inducing a stronger leukocytic inflammatory host tissue reaction after implantation. Histological analyses confirmed the good biocompatibility of the scaffolds containing di- and metaphosphates. In summary, this study demonstrates that the compressive strength and degradation rate of Ca-P scaffolds can be improved by incorporation of di- and metaphosphates without affecting their good biocompatibility. Hence, this material modification may be particularly beneficial for the treatment of metaphyseal bone defects in weight bearing locations.
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Affiliation(s)
- Moritz Klein
- Department of Trauma-, Hand- and Reconstructive Surgery, Saarland University, Kirrberger Str. 1, D-66421 Homburg/Saar, Germany
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Lee JH, Mandakhbayar N, El-Fiqi A, Kim HW. Intracellular co-delivery of Sr ion and phenamil drug through mesoporous bioglass nanocarriers synergizes BMP signaling and tissue mineralization. Acta Biomater 2017; 60:93-108. [PMID: 28713017 DOI: 10.1016/j.actbio.2017.07.021] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 07/09/2017] [Accepted: 07/12/2017] [Indexed: 12/12/2022]
Abstract
Inducing differentiation and maturation of resident multipotent stem cells (MSCs) is an important strategy to regenerate hard tissues in mal-calcification conditions. Here we explore a co-delivery approach of therapeutic molecules comprised of ion and drug through a mesoporous bioglass nanoparticle (MBN) for this purpose. Recently, MBN has offered unique potential as a nanocarrier for hard tissues, in terms of high mesoporosity, bone bioactivity (and possibly degradability), tunable delivery of biomolecules, and ionic modification. Herein Sr ion is structurally doped to MBN while drug Phenamil is externally loaded as a small molecule activator of BMP signaling, for the stimulation of osteo/odontogenesis and mineralization of human MSCs derived from dental pulp. The Sr-doped MBN (85Si:10Ca:5Sr) sol-gel processed presents a high mesoporosity with a pore size of ∼6nm. In particular, Sr ion is released slowly at a daily rate of ∼3ppm per mg nanoparticles for up to 7days, a level therapeutically effective for cellular stimulation. The Sr-MBN is internalized to most MSCs via an ATP dependent macropinocytosis within hours, increasing the intracellular levels of Sr, Ca and Si ions. Phenamil is loaded maximally ∼30% into Sr-MBN and then released slowly for up to 7days. The co-delivered molecules (Sr ion and Phenamil drug) have profound effects on the differentiation and maturation of cells, i.e., significantly enhancing expression of osteo/odontogenic genes, alkaline phosphatase activity, and mineralization of cells. Of note, the stimulation is a result of a synergism of Sr and Phenamil, through a Trb3-dependent BMP signaling pathway. This biological synergism is further evidenced in vivo in a mal-calcification condition involving an extracted tooth implantation in dorsal subcutaneous tissues of rats. Six weeks post operation evidences the osseous-dentinal hard tissue formation, which is significantly stimulated by the Sr/Phenamil delivery, based on histomorphometric and micro-computed tomographic analyses. The bioactive nanoparticles releasing both Sr ion and Phenamil drug are considered to be a promising therapeutic nanocarrier platform for hard tissue regeneration. Furthermore, this novel ion/drug co-delivery concept through nanoparticles can be extensively used for other tissues that require different therapeutic treatment. STATEMENT OF SIGNIFICANCE This study reports a novel design concept in inorganic nanoparticle delivery system for hard tissues - the co-delivery of therapeutic molecules comprised of ion (Sr) and drug (Phenamil) through a unique nanoparticle of mesoporous bioactive glass (MBN). The physico-chemical and biological properties of MBN enabled an effective loading of both therapeutic molecules and a subsequently sustained/controlled release. The co-delivered Sr and Phenamil demonstrated significant stimulation of adult stem cell differentiation in vitro and osseous/dentinal regeneration in vivo, through BMP signaling pathways. We consider the current combination of Sr ion with Phenamil is suited for the osteo/odontogenesis of stem cells for hard tissue regeneration, and further, this ion/drug co-delivery concept can extend the applications to other areas that require specific cellular and tissue functions.
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Mancuso E, Bretcanu OA, Marshall M, Birch MA, McCaskie AW, Dalgarno KW. Novel bioglasses for bone tissue repair and regeneration: Effect of glass design on sintering ability, ion release and biocompatibility. MATERIALS & DESIGN 2017; 129:239-248. [PMID: 28883669 PMCID: PMC5521854 DOI: 10.1016/j.matdes.2017.05.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 05/11/2017] [Accepted: 05/11/2017] [Indexed: 05/08/2023]
Abstract
Eight novel silicate, phosphate and borate glass compositions (coded as NCLx, where x = 1 to 8), containing different oxides (i.e. MgO, MnO2, Al2O3, CaF2, Fe2O3, ZnO, CuO, Cr2O3) were designed and evaluated alongside apatite-wollastonite (used as comparison material), as potential biomaterials for bone tissue repair and regeneration. Glass frits of all the formulations were processed to have particle sizes under 53 μm, with their morphology and dimensions subsequently investigated by scanning electron microscopy (SEM). In order to establish the nature of the raw glass powders, X-ray diffraction (XRD) analysis was also performed. The sintering ability of the novel materials was determined by using hot stage microscopy (HSM). Ionic release potential was assessed by inductively coupled plasma optical emission spectroscopy (ICP-OES). Finally, the cytotoxic effect of the novel glass powders was evaluated for different glass concentrations via a colorimetric assay, on which basis three formulations are considered promising biomaterials.
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Affiliation(s)
- Elena Mancuso
- School of Mechanical and Systems Engineering, Newcastle University, UK
- School of Mechanical Engineering, University of Leeds, UK
| | - Oana A. Bretcanu
- School of Mechanical and Systems Engineering, Newcastle University, UK
| | | | - Mark A. Birch
- Division of Trauma and Orthopaedic Surgery, University of Cambridge, UK
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No YJ, Roohaniesfahani S, Lu Z, Shi J, Zreiqat H. Strontium-doped calcium silicate bioceramic with enhanced in vitro osteogenic properties. ACTA ACUST UNITED AC 2017; 12:035003. [PMID: 28348275 DOI: 10.1088/1748-605x/aa6987] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Gehlenite (GLN, Ca2SiAl2O7) is a bioceramic that has been recently shown to possess excellent mechanical strength and in vitro osteogenic properties for bone regeneration. Substitutional incorporation of strontium in place of calcium is an effective way to further enhance biological properties of calcium-based bioceramics and glasses. However, such strategy has the potential to affect other important physicochemical parameters such as strength and degradation due to differences in the ionic radius of strontium and calcium. This study is the first to investigate the effect of a range of concentrations of strontium substitution of calcium at 1, 2, 5, 10 mol% (S1-GLN, S2-GLN, S5-GLN and S10-GLN) on the physicochemical and biological properties of GLN. We showed that up to 2 mol% strontium ion substitution retains the monophasic GLN structure when sintered at 1450 °C, whereas higher concentrations resulted in presence of calcium silicate impurities. Increased strontium incorporation resulted in changes in grain morphology and reduced densification when the ceramics were sintered at 1450 °C. Porous GLN, S1-GLN and S2-GLN scaffolds (∼80% porosity) showed compressive strengths of 2.05 ± 0.46 MPa, 1.76 ± 0.79 MPa and 1.57 ± 0.52 MPa respectively. S1-GLN and S2-GLN immersed in simulated body fluid showed increased strontium ion release but reduced calcium and silicon ion release compared to GLN without affecting overall weight loss and pH over a 21 d period. The bioactivity of the S2-GLN ceramics was significantly improved as reflected in the significant upregulation of HOB proliferation and differentiation compared to GLN. Overall, these results suggest that increased incorporation of strontium presents a trade-off between bioactivity and mechanical strength for GLN bioceramics. This is an important consideration in the development of strontium-doped bioceramics.
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Affiliation(s)
- Young Jung No
- Biomaterials and Tissue Engineering Research Unit, School of AMME, The University of Sydney, NSW, Australia
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Silica-Based and Borate-Based, Titania-Containing Bioactive Coatings Characterization: Critical Strain Energy Release Rate, Residual Stresses, Hardness, and Thermal Expansion. J Funct Biomater 2016; 7:jfb7040032. [PMID: 27916951 PMCID: PMC5197991 DOI: 10.3390/jfb7040032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 11/25/2016] [Accepted: 11/28/2016] [Indexed: 11/16/2022] Open
Abstract
Silica-based and borate-based glass series, with increasing amounts of TiO2 incorporated, are characterized in terms of their mechanical properties relevant to their use as metallic coating materials. It is observed that borate-based glasses exhibit CTE (Coefficient of Thermal Expansion) closer to the substrate’s (Ti6Al4V) CTE, translating into higher mode I critical strain energy release rates of glasses and compressive residual stresses and strains at the coating/substrate interface, outperforming the silica-based glasses counterparts. An increase in the content of TiO2 in the glasses results in an increase in the mode I critical strain energy release rate for both the bulk glass and for the coating/substrate system, proving that the addition of TiO2 to the glass structure enhances its toughness, while decreasing its bulk hardness. Borate-based glass BRT3, with 15 mol % TiO2 incorporated, exhibits superior properties overall compared to the other proposed glasses in this work, as well as 45S5 Bioglass® and Pyrex.
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16
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Roohani-Esfahani SI, No YJ, Lu Z, Ng PY, Chen Y, Shi J, Pavlos NJ, Zreiqat H. A bioceramic with enhanced osteogenic properties to regulate the function of osteoblastic and osteocalastic cells for bone tissue regeneration. Biomed Mater 2016; 11:035018. [DOI: 10.1088/1748-6041/11/3/035018] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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17
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Kim TH, Singh RK, Kang MS, Kim JH, Kim HW. Gene delivery nanocarriers of bioactive glass with unique potential to load BMP2 plasmid DNA and to internalize into mesenchymal stem cells for osteogenesis and bone regeneration. NANOSCALE 2016; 8:8300-8311. [PMID: 27035682 DOI: 10.1039/c5nr07933k] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The recent development of bioactive glasses with nanoscale morphologies has spurred their specific applications in bone regeneration, for example as drug and gene delivery carriers. Bone engineering with stem cells genetically modified with this unique class of nanocarriers thus holds great promise in this avenue. Here we report the potential of the bioactive glass nanoparticle (BGN) system for the gene delivery of mesenchymal stem cells (MSCs) targeting bone. The composition of 15% Ca-added silica, proven to be bone-bioactive, was formulated into surface aminated mesoporous nanospheres with enlarged pore sizes, to effectively load and deliver bone morphogenetic protein-2 (BMP2) plasmid DNA. The enlarged mesopores were highly effective in loading BMP2-pDNA with an efficiency as high as 3.5 wt% (pDNA w.r.t. BGN), a level more than twice than for small-sized mesopores. The BGN nanocarriers released the genetic molecules in a highly sustained manner (for as long as 2 weeks). The BMP2-pDNA/BGN complexes were effectively internalized to rat MSCs with a cell uptake level of ∼73%, and the majority of cells were transfected to express the BMP2 protein. Subsequent osteogenesis of the transfected MSCs was demonstrated by the expression of bone-related genes, including bone sialoprotein, osteopontin, and osteocalcin. The MSCs transfected with BMP2-pDNA/BGN were locally delivered inside a collagen gel to the target calvarium defects. The results showed significantly improved bone regeneration, as evidenced by the micro-computed tomographic, histomorphometric and immunohistochemical analyses. This study supports the excellent capacity of the BGN system as a pDNA-delivery nanocarrier in MSCs, and the engineered system, BMP2-pDNA/BGN with MSCs, may be considered a new promising candidate to advance the therapeutic potential of stem cells through genetic modification, targeting bone defects and diseases.
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Affiliation(s)
- Tae-Hyun Kim
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea. and Institute of Tissue Regeneration Engineering, Dankook University, Cheonan 330-714, Republic of Korea
| | - Rajendra K Singh
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea. and Institute of Tissue Regeneration Engineering, Dankook University, Cheonan 330-714, Republic of Korea
| | - Min Sil Kang
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea. and Institute of Tissue Regeneration Engineering, Dankook University, Cheonan 330-714, Republic of Korea
| | - Joong-Hyun Kim
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea. and Institute of Tissue Regeneration Engineering, Dankook University, Cheonan 330-714, Republic of Korea
| | - Hae-Won Kim
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, Republic of Korea. and Institute of Tissue Regeneration Engineering, Dankook University, Cheonan 330-714, Republic of Korea and Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan 330-714, Republic of Korea
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Kaur G, Waldrop SG, Kumar V, Pandey OP, Sriranganathan N. An Introduction and History of the Bioactive Glasses. BIOCOMPATIBLE GLASSES 2016. [DOI: 10.1007/978-3-319-44249-5_2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Bellucci D, Sola A, Cannillo V. Hydroxyapatite and tricalcium phosphate composites with bioactive glass as second phase: State of the art and current applications. J Biomed Mater Res A 2015; 104:1030-56. [DOI: 10.1002/jbm.a.35619] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 12/01/2015] [Accepted: 12/01/2015] [Indexed: 12/23/2022]
Affiliation(s)
- Devis Bellucci
- Department of Engineering “E. Ferrari,”; University of Modena and Reggio Emilia; via P. Vivarelli 10 Modena 41125 Italy
| | - Antonella Sola
- Department of Engineering “E. Ferrari,”; University of Modena and Reggio Emilia; via P. Vivarelli 10 Modena 41125 Italy
| | - Valeria Cannillo
- Department of Engineering “E. Ferrari,”; University of Modena and Reggio Emilia; via P. Vivarelli 10 Modena 41125 Italy
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Kapoor S, Goel A, Correia AF, Pascual MJ, Lee HY, Kim HW, Ferreira JM. Influence of ZnO/MgO substitution on sintering, crystallisation, and bio-activity of alkali-free glass-ceramics. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 53:252-61. [DOI: 10.1016/j.msec.2015.04.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 07/30/2014] [Accepted: 04/21/2015] [Indexed: 11/30/2022]
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21
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Zn and Sr incorporated 64S bioglasses: Material characterization, in-vitro bioactivity and mesenchymal stem cell responses. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 52:242-50. [DOI: 10.1016/j.msec.2015.03.057] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 02/04/2015] [Accepted: 03/24/2015] [Indexed: 02/07/2023]
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22
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Haas LM, Smith CM, Placek LM, Hall MM, Gong Y, Mellott NP, Wren AW. Investigating the effect of silver coating on the solubility, antibacterial properties, and cytocompatibility of glass microspheres. J Biomater Appl 2015; 30:450-62. [DOI: 10.1177/0885328215591902] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Silver (Ag) coatings have been incorporated into many medical materials due to its ability to eradicate harmful microbes. In this study, glass microspheres (SiO2–Na2O–CaO–Al2O3) were synthesized and employed as substrates to investigate the effect Ag coating has on glass solubility and the subsequent biological effects. Initially, glasses were amorphous with a glass transition point (Tg) of 605℃ and microspheres were spherical with a mean particle diameter of 120 µm (±27). The Ag coating was determined to be crystalline in nature and its presence was confirmed using scanning electron microscopy and X-ray photoelectron spectroscopy. Ion release determined that Ag-coated ( Ag-S) microspheres increased the Na+ release rate but slightly reduced the Ca2+ and Si4+ release compared to an uncoated control ( UC-S). Additionally, the Ag-S reduced the pH to just above neutral (7.3–8.5) compared to the UC-S (7.7–9.1). Antibacterial testing determined significant reductions in planktonic Escherichia coli ( p = 0.000), Staphylococcus epidermidis ( p = 0.000) and Staphylococcus aureus ( p = 0.000) growth as a function of the presence of Ag and with respect to maturation (1, 7, and 30 days). Testing for toxicity levels using L929 Fibroblasts determined higher cell viability for the Ag-S at lower concentrations (5 µg/ml); in addition, no significant reduction in cell viability was observed with higher concentrations (15, 30 µg/ml).
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Affiliation(s)
- LM Haas
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - CM Smith
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - LM Placek
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - MM Hall
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - Y Gong
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - NP Mellott
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - Anthony W Wren
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
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Kaur G, Pickrell G, Sriranganathan N, Kumar V, Homa D. Review and the state of the art: Sol-gel and melt quenched bioactive glasses for tissue engineering. J Biomed Mater Res B Appl Biomater 2015; 104:1248-75. [PMID: 26060931 DOI: 10.1002/jbm.b.33443] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 03/19/2015] [Accepted: 04/14/2015] [Indexed: 01/26/2023]
Abstract
Biomaterial development is currently the most active research area in the field of biomedical engineering. The bioglasses possess immense potential for being the ideal biomaterials due to their high adaptiveness to the biological environment as well as tunable properties. Bioglasses like 45S5 has shown great clinical success over the past 10 years. The bioglasses like 45S5 were prepared using melt-quenching techniques but recently porous bioactive glasses have been derived through sol-gel process. The synthesis route exhibits marked effect on the specific surface area, as well as degradability of the material. This article is an attempt to provide state of the art of the sol-gel and melt quenched bioactive bioglasses for tissue regeneration. Fabrication routes for bioglasses suitable for bone tissue engineering are highlighted and the effect of these fabrication techniques on the porosity, pore-volume, mechanical properties, cytocompatibilty and especially apatite layer formation on the surface of bioglasses is analyzed in detail. Drug delivery capability of bioglasses is addressed shortly along with the bioactivity of mesoporous glasses. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1248-1275, 2016.
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Affiliation(s)
- Gurbinder Kaur
- Department of Material Science and Engineering, Holden Hall, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA.,School of Physics & Materials Science, Thapar University, Patiala, 147004, India
| | - Gary Pickrell
- Department of Material Science and Engineering, Holden Hall, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA
| | - Nammalwar Sriranganathan
- Department of Biomedical Sciences and Pathobiology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA
| | - Vishal Kumar
- Department of Material Science and Engineering, Holden Hall, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA.,Sri Guru Granth Sahib World University, Fatehgarh Sahib, 140406, India
| | - Daniel Homa
- Department of Material Science and Engineering, Holden Hall, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA
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Kim KJ, Joe YA, Kim MK, Lee SJ, Ryu YH, Cho DW, Rhie JW. Silica nanoparticles increase human adipose tissue-derived stem cell proliferation through ERK1/2 activation. Int J Nanomedicine 2015; 10:2261-72. [PMID: 25848249 PMCID: PMC4378289 DOI: 10.2147/ijn.s71925] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Background Silicon dioxide composites have been found to enhance the mechanical properties of scaffolds and to support growth of human adipose tissue-derived stem cells (hADSCs) both in vitro and in vivo. Silica (silicon dioxide alone) exists as differently sized particles when suspended in culture medium, but it is not clear whether particle size influences the beneficial effect of silicon dioxide on hADSCs. In this study, we examined the effect of different sized particles on growth and mitogen-activated protein kinase signaling in hADSCs. Methods Silica gel was prepared by a chemical reaction using hydrochloric acid and sodium silicate, washed, sterilized, and suspended in serum-free culture medium for 48 hours, and then sequentially filtered through a 0.22 μm filter (filtrate containing nanoparticles smaller than 220 nm; silica NPs). hADSCs were incubated with silica NPs or 3 μm silica microparticles (MPs), examined by transmission electron microscopy, and assayed for cell proliferation, apoptosis, and mitogen-activated protein kinase signaling. Results Eighty-nine percent of the silica NPs were around 50–120 nm in size. When hADSCs were treated with the study particles, silica NPs were observed in endocytosed vacuoles in the cytosol of hADSCs, but silica MPs showed no cell entry. Silica NPs increased the proliferation of hADSCs, but silica MPs had no significant effect in this regard. Instead, silica MPs induced slight apoptosis. Silica NPs increased phosphorylation of extracellular signal-related kinase (ERK)1/2, while silica MPs increased phosphorylation of p38. Silica NPs had no effect on phosphorylation of Janus kinase or p38. Pretreatment with PD98059, a MEK inhibitor, prevented the ERK1/2 phosphorylation and proliferation induced by silica NPs. Conclusion Scaffolds containing silicon dioxide for tissue engineering may enhance cell growth through ERK1/2 activation only when NPs around 50–120 nm in size are included, and single component silica-derived NPs could be useful for bioscaffolds in stem cell therapy.
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Affiliation(s)
- Ki Joo Kim
- Department of Plastic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea ; Department of Molecular Biomedicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Young Ae Joe
- Cancer Research Institute and Department of Medical Lifescience, The Catholic University of Korea, Seoul, Republic of Korea
| | - Min Kyoung Kim
- Department of Plastic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea ; Department of Molecular Biomedicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Su Jin Lee
- Department of Plastic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Yeon Hee Ryu
- Department of Plastic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea ; Department of Molecular Biomedicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Dong-Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology, Gyeongbuk, Republic of Korea ; Department of Integrative Bioscience and Bioengineering, Pohang University of Science and Technology, Gyeongbuk, Republic of Korea
| | - Jong Won Rhie
- Department of Plastic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea ; Department of Molecular Biomedicine, The Catholic University of Korea, Seoul, Republic of Korea
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Setbon H, Devaux J, Iserentant A, Leloup G, Leprince J. Influence of composition on setting kinetics of new injectable and/or fast setting tricalcium silicate cements. Dent Mater 2014; 30:1291-303. [DOI: 10.1016/j.dental.2014.09.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 06/16/2014] [Accepted: 09/16/2014] [Indexed: 10/24/2022]
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26
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Bellucci D, Sola A, Cacciotti I, Bartoli C, Gazzarri M, Bianco A, Chiellini F, Cannillo V. Mg- and/or Sr-doped tricalcium phosphate/bioactive glass composites: Synthesis, microstructure and biological responsiveness. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 42:312-24. [DOI: 10.1016/j.msec.2014.05.047] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 05/18/2014] [Indexed: 10/25/2022]
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Liu X, Hasan MS, Grant DM, Harper LT, Parsons AJ, Palmer G, Rudd CD, Ahmed I. Mechanical, degradation and cytocompatibility properties of magnesium coated phosphate glass fibre reinforced polycaprolactone composites. J Biomater Appl 2014; 29:675-87. [DOI: 10.1177/0885328214541302] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Retention of mechanical properties of phosphate glass fibre reinforced degradable polyesters such as polycaprolactone and polylactic acid in aqueous media has been shown to be strongly influenced by the integrity of the fibre/polymer interface. A previous study utilising ‘single fibre’ fragmentation tests found that coating with magnesium improved the fibre and matrix interfacial shear strength. Therefore, the aim of this study was to investigate the effects of a magnesium coating on the manufacture and characterisation of a random chopped fibre reinforced polycaprolactone composite. Short chopped strand non-woven phosphate glass fibre mats were sputter coated with degradable magnesium to manufacture phosphate glass fibre/polycaprolactone composites. The degradation behaviour (water uptake, mass loss and pH change of the media) of these polycaprolactone composites as well as of pure polycaprolactone was investigated in phosphate buffered saline. The Mg coated fibre reinforced composites revealed less water uptake and mass loss during degradation compared to the non-coated composites. The cations released were also explored and a lower ion release profile for all three cations investigated (namely Na+, Mg2+ and Ca2+) was seen for the Mg coated composite samples. An increase of 17% in tensile strength and 47% in tensile modulus was obtained for the Mg coated composite samples. Both flexural and tensile properties were investigated and a higher retention of mechanical properties was obtained for the Mg coated fibre reinforced composite samples up to 10 days immersion in PBS. Cytocompatibility study showed both composite samples (coated and non-coated) had good cytocompatibility with human osteosarcoma cell line.
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Affiliation(s)
- Xiaoling Liu
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Muhammad S Hasan
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - David M Grant
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Lee T Harper
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Andrew J Parsons
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Graham Palmer
- Biomaterials and Tissue Engineering, Eastman Dental Institute, University College London, London, UK
| | - Chris D Rudd
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Ifty Ahmed
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
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Kapoor S, Goel A, Tilocca A, Dhuna V, Bhatia G, Dhuna K, Ferreira JMF. Role of glass structure in defining the chemical dissolution behavior, bioactivity and antioxidant properties of zinc and strontium co-doped alkali-free phosphosilicate glasses. Acta Biomater 2014; 10:3264-78. [PMID: 24709542 DOI: 10.1016/j.actbio.2014.03.033] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 03/19/2014] [Accepted: 03/30/2014] [Indexed: 11/19/2022]
Abstract
We investigated the structure-property relationships in a series of alkali-free phosphosilicate glass compositions co-doped with Zn(2+) and Sr(2+). The emphasis was laid on understanding the structural role of Sr(2+) and Zn(2+) co-doping on the chemical dissolution behavior of glasses and its impact on their in vitro bioactivity. The structure of glasses was studied using molecular dynamics simulations in combination with solid state nuclear magnetic resonance spectroscopy. The relevant structural properties are then linked to the observed degradation behavior, in vitro bioactivity, osteoblast proliferation and oxidative stress levels. The apatite-forming ability of glasses has been investigated by X-ray diffraction, infrared spectroscopy and scanning electron microscopy-energy-dispersive spectroscopy after immersion of glass powders/bulk in simulated body fluid (SBF) for time durations varying between 1h and 14 days, while their chemical degradation has been studied in Tris-HCl in accordance with ISO 10993-14. All the glasses exhibit hydroxyapatite formation on their surface within 1-3h of their immersion in SBF. The cellular responses were observed in vitro on bulk glass samples using human osteosarcoma MG63 cell line. The dose-dependent cytoprotective effect of glasses with respect to the concentration of zinc and strontium released from the glasses is also discussed.
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Affiliation(s)
- Saurabh Kapoor
- Department of Materials and Ceramic Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal
| | - Ashutosh Goel
- Department of Materials Science and Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854-8065, USA.
| | - Antonio Tilocca
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Vikram Dhuna
- Department of Biotechnology, DAV College, Amritsar 143-001, Punjab, India
| | - Gaurav Bhatia
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar 143-005, Punjab, India
| | - Kshitija Dhuna
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar 143-005, Punjab, India
| | - José M F Ferreira
- Department of Materials and Ceramic Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal.
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Wren AW, Coughlan A, Smith CM, Hudson SP, Laffir FR, Towler MR. Investigating the solubility and cytocompatibility of CaO-Na2O-SiO2/TiO2bioactive glasses. J Biomed Mater Res A 2014; 103:709-20. [DOI: 10.1002/jbm.a.35223] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 05/06/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Anthony W. Wren
- Inamori School of Engineering; Alfred University; Alfred New York
| | - Aisling Coughlan
- School of Materials Engineering; Purdue University; West Lafayette Indiana
| | | | - Sarah P. Hudson
- Materials and Surface Science Institute; University of Limerick; Limerick Ireland
| | - Fathima R. Laffir
- Materials and Surface Science Institute; University of Limerick; Limerick Ireland
| | - Mark R. Towler
- Department of Mechanical and Industrial Engineering; Ryerson University; Toronto Canada
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Liu L, Pushalkar S, Saxena D, LeGeros RZ, Zhang Y. Antibacterial property expressed by a novel calcium phosphate glass. J Biomed Mater Res B Appl Biomater 2014; 102:423-9. [PMID: 24039127 PMCID: PMC4035028 DOI: 10.1002/jbm.b.33019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 06/03/2013] [Accepted: 08/10/2013] [Indexed: 11/07/2022]
Abstract
We have developed a calcium phosphate glass (CPG) doped with Zn(2+) or F(-) or combined Zn(2+) and F(-) ions, which are naturally found in the human body and play a dual role in bone formation and antibacterial activity. Previously, we have demonstrated that this family of CPGs has superior osteoconductive and resorbable properties in vivo. This study aimed to investigate the antibacterial property of CPGs incorporating Zn(2+) and/or F(-) . We used Streptococcus mutans as a model organism because it is one of the major human oral pathogens and an early colonizer, and it has been associated with several oral infections, such as dental caries, periodontitis, and peri-implantitis. CPGs of 0.01 and 0.05 g were incubated with S. mutans for 0, 2, 4, and 6 h. Serial dilutions were plated in triplicate and colony forming units were determined. The antimicrobial effect of CPG incorporating Zn(2+) or F(-) was greater than CPG incorporating both these ions. CPG without doping produced a moderate antimicrobial effect. This family of CPGs, previously shown to promote new bone formation in vivo, is demonstrated to have superior bactericidal properties.
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Affiliation(s)
- Lela Liu
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, 345 E. 24 Street, New York, NY 10010, USA
| | - Smruti Pushalkar
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, 345 E. 24 Street, New York, NY 10010, USA
| | - Deepak Saxena
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, 345 E. 24 Street, New York, NY 10010, USA
| | - Racquel Z. LeGeros
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, 345 E. 24 Street, New York, NY 10010, USA
| | - Yu Zhang
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, 345 E. 24 Street, New York, NY 10010, USA
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Hydrogel/bioactive glass composites for bone regeneration applications: Synthesis and characterisation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:4203-12. [DOI: 10.1016/j.msec.2013.06.013] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 03/04/2013] [Accepted: 06/10/2013] [Indexed: 01/06/2023]
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32
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Kehoe S, Tremblay ML, Coughlan A, Towler MR, Rainey JK, Abraham RJ, Boyd D. Preliminary investigation of the dissolution behavior, cytocompatibility, effects of fibrinogen conformation and platelet adhesion for radiopaque embolic particles. J Funct Biomater 2013; 4:89-113. [PMID: 24956083 PMCID: PMC4030908 DOI: 10.3390/jfb4030089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 05/06/2013] [Accepted: 06/08/2013] [Indexed: 12/18/2022] Open
Abstract
Experimental embolic particles based on a novel zinc-silicate glass system have been biologically evaluated for potential consideration in transcatheter arterial embolization procedures. In addition to controlling the cytotoxicity and haemocompatibility for such embolic particles, its glass structure may mediate specific responses via dissolution in the physiological environment. In a 120 h in-vitro dissolution study, ion release levels for silicon (Si4+), sodium (Na+), calcium (Ca2+), zinc (Zn2+), titanium (Ti4+), lanthanum (La3+), strontium (Sr2+), and magnesium (Mg2+), were found to range from 0.04 to 5.41 ppm, 0.27-2.28 ppm, 2.32-8.47 ppm, 0.16-0.20 ppm, 0.12-2.15 ppm, 0.16-0.49 ppm and 0.01-0.12 ppm, respectively for the series of glass compositions evaluated. Initial release of Zn2+ (1.93-10.40 ppm) was only evident after 120 h. All compositions showed levels of cell viabilities ranging from 61.31 ± 4.33% to 153.7 ± 1.25% at 25%-100% serial extract dilutions. The conformational state of fibrinogen, known to induce thrombi, indicated that no changes were induced with respect of the materials dissolution by-products. Furthermore, the best-in-class experimental composition showed equivalency to contour PVA in terms of inducing platelet adhesion. The data generated here provides requisite evidence to continue to in-vivo pre-clinical evaluation using the best-in-class experimental composition evaluated.
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Affiliation(s)
- Sharon Kehoe
- Department of Applied Oral Sciences, Dalhousie University, PO Box 15000, Halifax, NS B3H 4R2, Canada.
| | | | - Aisling Coughlan
- Inamori School of Engineering, Alfred University, Alfred, NY 14802, USA.
| | - Mark R Towler
- Faculty of Engineering & Architectural Science, Ryerson University, 350 Victoria Street, Toronto, ON, M5B 2K3, Canada.
| | - Jan K Rainey
- Department of Biochemistry & Molecular Biology, Dalhousie University, NS, B3H 4R2, Canada.
| | - Robert J Abraham
- Department of Diagnostic Imaging and Interventional Radiology, QE II Health Sciences Centre, Dalhousie University, Halifax, NS B3H 4R2, Canada.
| | - Daniel Boyd
- Department of Applied Oral Sciences, Dalhousie University, PO Box 15000, Halifax, NS B3H 4R2, Canada.
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Xiang Y, Du J, Skinner LB, Benmore CJ, Wren AW, Boyd DJ, Towler MR. Structure and diffusion of ZnO–SrO–CaO–Na2O–SiO2 bioactive glasses: a combined high energy X-ray diffraction and molecular dynamics simulations study. RSC Adv 2013. [DOI: 10.1039/c3ra23231j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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Goel A, Kapoor S, Tilocca A, Rajagopal RR, Ferreira JMF. Structural role of zinc in biodegradation of alkali-free bioactive glasses. J Mater Chem B 2013; 1:3073-3082. [DOI: 10.1039/c3tb20163e] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kehoe S, Langman M, Werner-Zwanziger U, Abraham RJ, Boyd D. Mixture designs to assess composition–structure–property relationships in SiO2–CaO–ZnO–La2O3–TiO2–MgO–SrO–Na2O glasses: Potential materials for embolization. J Biomater Appl 2012; 28:416-33. [DOI: 10.1177/0885328212455834] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Embolization with micron-sized particulates is widely applied to treat uterine fibroids. The objective of this work was to develop mixture designs to predict materials composition–structure–property relationships for the SiO2–CaO–ZnO–La2O3–TiO2–MgO–SrO–Na2O glass system and compare its fundamental materials properties (density and cytocompatibility), against a state-of-the-art embolic agent (contour polyvinyl alcohol) to assess the potential of these materials for embolization therapies. The glass structures were evaluated using 29Si MAS NMR to identify chemical shift and line width; the particulate densities were determined using helium pycnometry and the cell viabilities were assessed via MTT assay. 29Si MAS NMR results indicated peak maxima for each glass in the range of −82.3 ppm to −89.9 ppm; associated with Q2 to Q3 units in silicate glasses. All experimental embolic compositions showed enhanced in vitro compatibility in comparison to Contour PVA with the exceptions of ORP9 and ORP11 (containing no TiO2). In this study, optimal compositions for cell viability were obtained for the following compositional ranges: 0.095–0.188 mole fraction ZnO; 0.068–0.159 mole fraction La2O3; 0.545–0.562 mole fraction SiO2 and 0.042–0.050 mole fraction TiO2. To ensure ease of producibility in obtaining good melts, a maximum loading of 0.068 mole fraction La2O3 is required. This is confirmed by the desirability approach, for which the only experimental composition (ORP5) of the materials evaluated was presented as an optimum composition; combining high cell viability with ease of production (0.188 mole fraction ZnO; 0.068 mole fraction La2O3; 0.562 mole fraction SiO2 and 0.042 mole fraction TiO2).
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Affiliation(s)
- Sharon Kehoe
- Department of Applied Oral Sciences, Dalhousie University, Halifax, NS, Canada
- School of Biomedical Engineering, Dalhousie University, Halifax, NS, Canada
| | - Maxine Langman
- Department of Applied Oral Sciences, Dalhousie University, Halifax, NS, Canada
| | - Ulli Werner-Zwanziger
- Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, NS, Canada
| | - Robert J Abraham
- Department of Diagnostic Imaging and Interventional Radiology, QE II Health Sciences Centre, Dalhousie University, Halifax, NS, Canada
| | - Daniel Boyd
- Department of Applied Oral Sciences, Dalhousie University, Halifax, NS, Canada
- School of Biomedical Engineering, Dalhousie University, Halifax, NS, Canada
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36
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Experimental composite guidance conduits for peripheral nerve repair: An evaluation of ion release. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 32:1654-63. [DOI: 10.1016/j.msec.2012.04.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 02/10/2012] [Accepted: 04/22/2012] [Indexed: 11/22/2022]
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37
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Sauro S, Osorio R, Watson TF, Toledano M. Therapeutic effects of novel resin bonding systems containing bioactive glasses on mineral-depleted areas within the bonded-dentine interface. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:1521-1532. [PMID: 22466816 DOI: 10.1007/s10856-012-4606-6] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2011] [Accepted: 02/27/2012] [Indexed: 05/31/2023]
Abstract
This study aimed in evaluating the effects of two experimental resin bonding systems containing conventional Bioglass 45S5 (BAG) or Zinc-polycarboxylated bioactive glass (BAG-Zn) micro-fillers on the resin-bonded dentine interface after storage in a simulated body fluid solution (SBFS). Three resin bonding systems were formulated: Resin-A: (BAG containing); Resin-B; (BAG-Zn containing); Resin-C (no filler). The ability of the experimental resins to evoke apatite formation was evaluated using confocal Raman spectroscopy. Acid-etched dentine specimens were bonded, and prepared for AFM/nano-indentation analysis in a fully-hydrated status to evaluate the modulus of elasticity (Ei) and hardness (Hi) across the interface at different SBFS storage periods. Further resin-dentine specimens were tested for microtensile bond strength after 24 h or 3 months of SBFS storage. SEM examination was performed after de-bonding and confocal laser microscopy was used to evaluate the ultramorphology of the interfaces and micropermeability. The resin A and B showed a consistent presence of apatite (967 cm(-1)), reduced micropermeability within the resin-dentine interface and a significant increase of the Ei and Hi along the bonded-dentine interface after prolonged SBFS storage. Bond strength values were affected by the resin system (P < 0.0001) and by storage time (P < 0.0001) both after 24 h and 3 months of SBFS storage. In conclusion, resin bonding systems containing bioactive fillers may a have therapeutic effect on the nano-mechanical properties and sealing ability of mineral-depleted resin-dentine interface.
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Affiliation(s)
- Salvatore Sauro
- Biomaterials, Biomimetics and Biophotonics, King's College London Dental Institute, Guy's Dental Hospital, London, England, UK.
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Place ES, Rojo L, Gentleman E, Sardinha JP, Stevens MM. Strontium- and Zinc-Alginate Hydrogels for Bone Tissue Engineering. Tissue Eng Part A 2011; 17:2713-22. [DOI: 10.1089/ten.tea.2011.0059] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Elsie S. Place
- Department of Materials, Imperial College London, London, United Kingdom
- Institute for Biomedical Engineering, Imperial College London, London, United Kingdom
| | - Luis Rojo
- Department of Materials, Imperial College London, London, United Kingdom
- Institute for Biomedical Engineering, Imperial College London, London, United Kingdom
| | - Eileen Gentleman
- Department of Materials, Imperial College London, London, United Kingdom
- Institute for Biomedical Engineering, Imperial College London, London, United Kingdom
| | - José P. Sardinha
- Department of Materials, Imperial College London, London, United Kingdom
- Institute for Biomedical Engineering, Imperial College London, London, United Kingdom
| | - Molly M. Stevens
- Department of Materials, Imperial College London, London, United Kingdom
- Institute for Biomedical Engineering, Imperial College London, London, United Kingdom
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39
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Influence of strontium on structure, sintering and biodegradation behaviour of CaO-MgO-SrO-SiO(2)-P(2)O(5)-CaF(2) glasses. Acta Biomater 2011; 7:4071-80. [PMID: 21763793 DOI: 10.1016/j.actbio.2011.06.047] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 06/23/2011] [Accepted: 06/27/2011] [Indexed: 11/23/2022]
Abstract
The present study investigates the influence of SrO on structure, apatite-forming ability, physico-chemical degradation and sintering behaviour of melt-quenched bioactive glasses with the composition (mol.%): (36.07 - x) CaO-xSrO-19.24MgO-5.61P(2)O(5)-38.49SiO(2)-0.59CaF(2), where x varies between 0 and 10. The detailed structural analysis of the glasses is made by infrared spectroscopy and magic angle spinning-nuclear magnetic resonance spectroscopy. Silicon is predominantly present as Q(2) (Si) species, while phosphorus is found as orthophosphate in all the investigated glasses. The apatite-forming ability of glasses is investigated by immersion of glass powders in simulated body fluid for time durations varying between 1 h and 7 days. While increasing the Sr(2+)/Ca(2+) ratio in the glasses does not affect their structure significantly, their apatite-forming ability is decreased considerably. Further, physico-chemical degradation of glasses is studied in accordance with ISO 10993-14 "Biological evaluation of medical devices - Part 14: Identification and quantification of degradation products from ceramics" in Tris-HCl and citric acid buffer, and the possible implications of the ion release profiles from the glasses in different solutions are discussed. The addition of strontium to the glasses leads to a sevenfold decrease in chemical degradation of glasses in Tris-HCl. The sintering of glass powders renders glass ceramics (GCs) with varying degrees of crystallinity and good flexural strength (98-131 MPa), where the mechanical properties depend on the nature and amount of crystalline phases present in the GCs.
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40
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Time-dependent evaluation of mechanical properties and in vitro cytocompatibility of experimental composite-based nerve guidance conduits. J Mech Behav Biomed Mater 2011; 4:1266-74. [DOI: 10.1016/j.jmbbm.2011.04.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 04/11/2011] [Accepted: 04/15/2011] [Indexed: 11/19/2022]
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41
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Kehoe S, Zhang XF, Boyd D. Composition-property relationships for an experimental composite nerve guidance conduit: evaluating cytotoxicity and initial tensile strength. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:945-959. [PMID: 21369711 DOI: 10.1007/s10856-011-4263-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Accepted: 02/18/2011] [Indexed: 05/30/2023]
Abstract
The objective of this work was to examine the main (individual), combined (interaction) and second-order (quadratic) effects of: (i) poly(D,L-lactide-co-glycolide) (PLGA), (ii) F127, and (iii) a zinc-silicate based bioactive glass, on the cytotoxicity and ultimate tensile strength of an experimental nerve guidance conduit (NGC). The experimental plan was carried out according to a Box-Behnken design matrix. The effects of each compositional factor were quantified using response surface methodology (RSM) techniques. Linear and quadratic polynomial equations were developed to examine cytotoxicity (after incubation at 3, 7 and 28 days) and initial ultimate tensile strength (UTS(0)). Multiple regression analyses showed that the developed models yielded a good prediction for each response examined. It was observed that the beneficial effects of PLGA and bioactive glass on controlling cytotoxicity appeared greater than that of F127. Furthermore, the experimental conduits (with the exception of CNGC-I and CNGC-K) generally showed superior cytocompatibility when compared with the comparable literature for the clinically used nerve guidance conduit Neurolac(®). In this investigation, optimal compositions for cell viability were obtained for the following composition: PLGA = 18.89 wt%/F127 = 0.52 wt%/glass = 12.71 wt%. The optimization of composition with respect to ultimate tensile strength was also established (desired UTS(0) being based on the properties of the control device Neurolac(®) whose UTS is c.20 MPa). The desired UTS(0) of ≤ 20 MPa was found for the composition: PLGA = 18.63 wt%/F127 = 0.77 wt%/glass = 5.54 wt%. A UTS(0) ≤ 30 MPa was recorded for the composition: PLGA = 18.34 wt%/F127 = 0.62 wt%/glass = 9.83 wt%, such tensile strengths are comparable to, reported values for Neurolac(®). Examination of the composition-property relationships with respect to combining cell viability and UTS(0) indicated preferred compositions in the range 17.97-19.90 wt% PLGA, 0.16-1.13 wt% F127 and between 5.54 and ≤ 20 wt% glass. This research demonstrates the value of a design of experiments approach for the design of novel nerve guidance conduits, and shows that the materials examined may have potential for the repair of peripheral nerve discontinuities.
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Affiliation(s)
- S Kehoe
- Department of Applied Oral Sciences, Dalhousie University, 5981 University Ave, Halifax, NS B3H 4R2, Canada.
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Hoppe A, Güldal NS, Boccaccini AR. A review of the biological response to ionic dissolution products from bioactive glasses and glass-ceramics. Biomaterials 2011; 32:2757-74. [PMID: 21292319 DOI: 10.1016/j.biomaterials.2011.01.004] [Citation(s) in RCA: 1278] [Impact Index Per Article: 98.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Accepted: 01/04/2011] [Indexed: 01/08/2023]
Abstract
Several inorganic materials such as special compositions of silicate glasses, glass-ceramics and calcium phosphates have been shown to be bioactive and resorbable and to exhibit appropriate mechanical properties which make them suitable for bone tissue engineering applications. However, the exact mechanism of interaction between the ionic dissolution products of such inorganic materials and human cells are not fully understood, which has prompted considerable research work in the biomaterials community during the last decade. This review comprehensively covers literature reports which have investigated specifically the effect of dissolution products of silicate bioactive glasses and glass-ceramics in relation to osteogenesis and angiogenesis. Particularly, recent advances made in fabricating dense biomaterials and scaffolds doped with trace elements (e.g. Zn, Sr, Mg, and Cu) and investigations on the effect of these elements on the scaffold biological performance are summarized and discussed in detail. Clearly, the biological response to artificial materials depends on many parameters such as chemical composition, topography, porosity and grain size. This review, however, focuses only on the ion release kinetics of the materials and the specific effect of the released ionic dissolution products on human cell behaviour, providing also a scope for future investigations and identifying specific research needs to advance the field. The biological performance of pure and doped silicate glasses, phosphate based glasses with novel specific compositions as well as several other silicate based compounds are discussed in detail. Cells investigated in the reviewed articles include human osteoblastic and osteoclastic cells as well as endothelial cells and stem cells.
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Affiliation(s)
- Alexander Hoppe
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany
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Kansal I, Goel A, Tulyaganov DU, Santos LF, Ferreira JMF. Structure, surface reactivity and physico-chemical degradation of fluoride containing phospho-silicate glasses. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10811e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Popp JR, Laflin KE, Love BJ, Goldstein AS. In vitro evaluation of osteoblastic differentiation on amorphous calcium phosphate-decorated poly(lactic-co-glycolic acid) scaffolds. J Tissue Eng Regen Med 2010; 5:780-9. [DOI: 10.1002/term.376] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2009] [Accepted: 09/02/2010] [Indexed: 11/06/2022]
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