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Córdova-Udaeta M, Kim Y, Yasukawa K, Kato Y, Fujita T, Dodbiba G. Study on the Synthesis of Hydroxyapatite under Highly Alkaline Conditions. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05969] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Mauricio Córdova-Udaeta
- Department of Systems Innovation, Graduate School Of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656 Tokyo, Japan
| | - Yonggu Kim
- Department of Systems Innovation, Graduate School Of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656 Tokyo, Japan
| | - Kazutaka Yasukawa
- Department of Systems Innovation, Graduate School Of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656 Tokyo, Japan
- Frontier Research Center for Energy and Resources, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656 Tokyo, Japan
- Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
| | - Yasuhiro Kato
- Department of Systems Innovation, Graduate School Of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656 Tokyo, Japan
- Frontier Research Center for Energy and Resources, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656 Tokyo, Japan
- Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
- Submarine Resources Research Center, Research Institute for Marine Resources Utilization, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan
| | - Toyohisa Fujita
- School of Resources, Environment and Materials, Guangxi University, 100 Daxue Road, Nanning, Guangxi 530004, P. R. China
| | - Gjergj Dodbiba
- Department of Systems Innovation, Graduate School Of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656 Tokyo, Japan
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Morales-Figueroa C, Teutli-Sequeira A, Linares-Hernández I, Martínez-Miranda V, Garduño-Pineda L, Barrera-Díaz CE, García-Morales MA, Mier-Quiroga MA. Phosphate removal from food industry wastewater by chemical precipitation treatment with biocalcium eggshell. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:549-565. [PMID: 33678136 DOI: 10.1080/10934529.2021.1895591] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 02/17/2021] [Accepted: 02/19/2021] [Indexed: 06/12/2023]
Abstract
The physicochemical treatment (PT) of food industry wastewater was investigated. In the first stage, calcium magnesium acetate (CaMgAc4) was synthesized using eggshell (biocalcium), magnesium oxide and acetic acid in a 1:1:1 stoichiometric ratio. In the synthesis process, the thermodynamic parameters (ΔH, ΔS and ΔG) indicated that the reaction was endothermic and spontaneous. The samples were characterized by infrared spectroscopy (IR), scanning electronic microscopy (SEM), X-ray diffraction (XRD) and electron X-ray dispersive spectroscopy (EDS). CaMgAc4 was used to precipitate the phosphate matter. IR analysis revealed that the main functional groups were representative of the acetate compounds and the presence of OH- groups and carbonates. In the physicochemical treatment, a response surface design was used to determine the variables that influence the process (pH, t, and concentration), and the response variable was phosphorus removal. The treatments were carried out in the wastewater industry with an initial concentration of 658 mg/L TP. The optimal conditions of the precipitation treatment were pH 12, time 12 min, and a CaMgAc4 concentration of 13.18 mg/L. These conditions allowed the total elimination (100%) of total phosphorus and phosphates, 81.43% BOD5 and 81.0% COD, 98.9% turbidity, 95.01% color, and 92% nitrogen matter.
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Affiliation(s)
- Cristina Morales-Figueroa
- Facultad de Química, Unidad Colón, Paseo Colón esq. Paseo Tollocan, Residencial Colonia Ciprés, Toluca, Estado de México, México
| | - Alejandra Teutli-Sequeira
- Cátedras CONACyT-IITCA, Mexico City, México
- Instituto Interamericano de Tecnología y Ciencias del Agua (IITCA), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Ivonne Linares-Hernández
- Instituto Interamericano de Tecnología y Ciencias del Agua (IITCA), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Verónica Martínez-Miranda
- Instituto Interamericano de Tecnología y Ciencias del Agua (IITCA), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Laura Garduño-Pineda
- Instituto Interamericano de Tecnología y Ciencias del Agua (IITCA), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
| | - Carlos E Barrera-Díaz
- Facultad de Química, Unidad Colón, Paseo Colón esq. Paseo Tollocan, Residencial Colonia Ciprés, Toluca, Estado de México, México
| | | | - Miroslava A Mier-Quiroga
- Instituto Interamericano de Tecnología y Ciencias del Agua (IITCA), Universidad Autónoma del Estado de México, Toluca, Estado de México, México
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103
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Carmona FJ, Dal Sasso G, Ramírez-Rodríguez GB, Pii Y, Delgado-López JM, Guagliardi A, Masciocchi N. Urea-functionalized amorphous calcium phosphate nanofertilizers: optimizing the synthetic strategy towards environmental sustainability and manufacturing costs. Sci Rep 2021; 11:3419. [PMID: 33564033 PMCID: PMC7873063 DOI: 10.1038/s41598-021-83048-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 01/27/2021] [Indexed: 01/30/2023] Open
Abstract
Nanosized fertilizers are the new frontier of nanotechnology towards a sustainable agriculture. Here, an efficient N-nanofertilizer is obtained by post-synthetic modification (PSM) of nitrate-doped amorphous calcium phosphate (ACP) nanoparticles (NPs) with urea. The unwasteful PSM protocol leads to N-payloads as large as 8.1 w/w%, is well replicated by using inexpensive technical-grade reagents for cost-effective up-scaling and moderately favours urea release slowdown. Using the PSM approach, the N amount is ca. 3 times larger than that obtained in an equivalent one-pot synthesis where urea and nitrate are jointly added during the NPs preparation. In vivo tests on cucumber plants in hydroponic conditions show that N-doped ACP NPs, with half absolute N-content than in conventional urea treatment, promote the formation of an equivalent amount of root and shoot biomass, without nitrogen depletion. The high nitrogen use efficiency (up to 69%) and a cost-effective preparation method support the sustainable real usage of N-doped ACP as a nanofertilizer.
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Affiliation(s)
- Francisco J Carmona
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, 22100, Como, Italy.
| | - Gregorio Dal Sasso
- Institute of Crystallography and To.Sca.Lab, Consiglio Nazionale Delle Ricerche, Via Valleggio 11, 22100, Como, Italy
| | | | - Youry Pii
- Faculty of Science and Technologies, Free University of Bolzano, Piazza Università 5, 39100, Bolzano, Italy
| | - José Manuel Delgado-López
- Department of Inorganic Chemistry, University of Granada, Av. Fuentenueva S/N, 18071, Granada, Spain
| | - Antonietta Guagliardi
- Institute of Crystallography and To.Sca.Lab, Consiglio Nazionale Delle Ricerche, Via Valleggio 11, 22100, Como, Italy.
| | - Norberto Masciocchi
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, 22100, Como, Italy.
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Costa-Pinto AR, Lemos AL, Tavaria FK, Pintado M. Chitosan and Hydroxyapatite Based Biomaterials to Circumvent Periprosthetic Joint Infections. MATERIALS (BASEL, SWITZERLAND) 2021; 14:804. [PMID: 33567675 PMCID: PMC7914941 DOI: 10.3390/ma14040804] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/23/2021] [Accepted: 02/02/2021] [Indexed: 02/06/2023]
Abstract
Every year, worldwide, millions of people suffering from joint pain undergo joint replacement. For most patients, joint arthroplasty reduces pain and improve function, though a small fraction will experience implant failure. One of the main reasons includes prosthetic joint infection (PJI), involving the prosthesis and adjacent tissues. Few microorganisms (MO) are required to inoculate the implant, resulting in the formation of a biofilm on its surface. Standard treatment includes not only removal of the infected prosthesis but also the elimination of necrotic bone fragments, local and/or systemic administration of antibiotics, and revision arthroplasty with a new prosthesis, immediately after the infection is cleared. Therefore, an alternative to the conventional therapeutics would be the incorporation of natural antimicrobial compounds into the prosthesis. Chitosan (Ch) is a potential valuable biomaterial presenting properties such as biocompatibility, biodegradability, low immunogenicity, wound healing ability, antimicrobial activity, and anti-inflammatory potential. Regarding its antimicrobial activity, Gram-negative and Gram-positive bacteria, as well as fungi are highly susceptible to chitosan. Calcium phosphate (CaP)-based materials are commonly utilized in orthopedic and dentistry for their excellent biocompatibility and bioactivity, particularly in the establishment of cohesive bone bonding that yields effective and rapid osteointegration. At present, the majority of CaP-based materials are synthetic, which conducts to the depletion of the natural resources of phosphorous in the future due to the extensive use of phosphate. CaP in the form of hydroxyapatite (HAp) may be extracted from natural sources as fish bones or scales, which are by-products of the fish food industry. Thus, this review aims to enlighten the fundamental characteristics of Ch and HAp biomaterials which makes them attractive to PJI prevention and bone regeneration, summarizing relevant studies with these biomaterials to the field.
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Affiliation(s)
| | | | | | - Manuela Pintado
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (A.L.L.); (F.K.T.)
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105
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Osak P, Maszybrocka J, Kubisztal J, Ratajczak P, Łosiewicz B. Long-Term Assessment of the In Vitro Corrosion Resistance of Biomimetic ACP Coatings Electrodeposited from an Acetate Bath. J Funct Biomater 2021; 12:12. [PMID: 33562425 PMCID: PMC7930999 DOI: 10.3390/jfb12010012] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 12/31/2022] Open
Abstract
Calcium phosphate coatings are able to improve the osseointegration process due to their chemical composition, which is similar to that of bone tissues. In this work, to increase the long-term corrosion resistance and to improve the osseointegration process of commercially pure titanium Grade 4 (CpTi G4), biomimetic amorphous calcium phosphate (ACP) coatings were electrodeposited for the first time from an acetate bath with a pH level of 7.0 and a Ca:P ratio of 1.67. ACP coatings were obtained on CpTi G4 substrate subjected to sandblasting and autoclaving using electrochemically assisted deposition at a potential of -3 V relative to the open circuit potential for 30 min at room temperature. SEM, EDS, 2D roughness profiles, amplitude-sensitive eddy current method, and Kelvin scanning probe were used for the surface characterization of the biomaterial under study. In vitro corrosion resistance tests were conducted for 21 days in artificial saliva using open circuit potential, polarization curves, and electrochemical impedance spectroscopy measurements. The passive-transpassive behavior was revealed for the obtained ACP coatings. The long-term corrosion resistance test showed a deterioration of the protective properties for CpTi G4 uncoated and coated with ACP with immersion time. The mechanism and kinetics of the pitting corrosion on the CpTi G4|TiO2|ACP coating system are discussed in detail.
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Affiliation(s)
- Patrycja Osak
- Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland; (J.M.); (J.K.); (P.R.)
| | | | | | | | - Bożena Łosiewicz
- Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland; (J.M.); (J.K.); (P.R.)
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106
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Song J, Li T, Gao J, Li C, Jiang S, Zhang X. Building an aprismatic enamel-like layer on a demineralized enamel surface by using carboxymethyl chitosan and lysozyme-encapsulated amorphous calcium phosphate nanogels. J Dent 2021; 107:103599. [PMID: 33561513 DOI: 10.1016/j.jdent.2021.103599] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 02/01/2021] [Accepted: 02/04/2021] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES The purpose of this study was to prepare carboxymethyl chitosan (CMC) and lysozyme nanogels that could encapsulate amorphous calcium phosphate (ACP) for achieving its controlled delivery, thus forming an aprismatic enamel-like layer on the demineralized enamel surface. METHODS CMC/LYZ-ACP nanogels were developed, and the controlled delivery of ACP from the nanogels was induced by the presence of NaCl. The nanogel morphologies at various NaCl concentrations was measured by transmission electron microscopy (TEM). The particle sizes and zeta potentials (ζ-potential) of the samples were determined using a combined dynamic light scattering/particle electrophoresis instrument. Comparing the remineralization effect of the CMC/LYZ-ACP nanogels on the demineralized enamel surface with that of a fluoride treatment, the remineralization effect was examined by nanoindentation tests, X-ray diffraction (XRD), confocal laser scanning microscopy (CLSM), and scanning electron microscopy (SEM). RESULTS CMC/LYZ-ACP nanogels were negatively charged spherical structures with a particle size of approximately 300 nm. At high concentrations of NaCl (0.15 M), ACP was dissociated from the disassembled nanogels and transformed into hydroxyapatite (HAP). Groups treated with the CMC/LYZ-ACP nanogels showed the regeneration of an aprismatic enamel-like layer on an acid-etched enamel surface, which provided increased mechanical properties (P < 0.05) and a high impermeability (P < 0.01) compared to those of the fluoride-treated group. CONCLUSIONS This research provides a new idea for the stable and controllable delivery of ACP from CMC/LYZ-ACP nanogels, which can form an aprismatic enamel-like layer in situ on the surface of demineralized enamel. In regard to further clinical development, this material and method may be promising for treating early enamel caries.
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Affiliation(s)
- Jinhua Song
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Tiancheng Li
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Jian Gao
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Changyi Li
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China; Institute of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Shaoyun Jiang
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China; Department of Periodontology, Center of Stomatology, Shenzhen Hospital, Peking University, Shenzhen 518000, China.
| | - Xu Zhang
- School of Stomatology, Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China; Institute of Stomatology, Tianjin Medical University, Tianjin 300070, China.
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107
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Abstract
One of the most fascinating aspects of mitochondria is their remarkable ability to accumulate and store large amounts of calcium in the presence of phosphate leading to mitochondrial calcification. In this paper, we briefly address the mechanisms that regulate mitochondrial calcium homeostasis followed by the extensive review on the formation and characterization of intramitochondrial calcium phosphate granules leading to mitochondrial calcification and its relevance to physiological and pathological calcifications of body tissues.
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Affiliation(s)
- Bhargavi Duvvuri
- Department of Medicine, Division of Rheumatology, University of Washington, Seattle, WA 98195, USA
| | - Christian Lood
- Department of Medicine, Division of Rheumatology, University of Washington, Seattle, WA 98195, USA
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108
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Zhang L, Xu Y, Jin X, Wang C, Li M, Zhou Z, Fu B. Biomimetic fabrication and application of fibrous-like nanotubes. Life Sci 2021; 270:119126. [PMID: 33508295 DOI: 10.1016/j.lfs.2021.119126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 01/09/2021] [Accepted: 01/19/2021] [Indexed: 10/22/2022]
Abstract
AIMS To investigate the biomimetic fabrication of fibrous-like organic-inorganic hybrid structures via a simple bottom-up approach, viz. self-assembly of simple molecules, and apply fibrous-like composites as a novel primer to improve dentin bond strengths of self-etch adhesives. MATERIALS AND METHODS The resultants of commercial amorphous calcium phosphate (ACP) nanoparticles and 10-methacryloyloxydecyl dihydrogen phosphate (MDP) ethanol-aqueous solution were analyzed by TEM, SEM, XRD, DLS and AFM. The acid and alkali resistance of abovementioned self-assembled composites were analyzed with TEM. Micro-tensile bond strengths (MTBS) tests were performed after polished dentin surfaces were pretreated with self-assembled composites. The pretreated dentin surfaces and dentin-resin interfaces were characterized by SEM/TEM. KEY FINDINGS ACP nanoparticles in MDP solution could self-assemble into fibrous-like nanotube structures in 8 nm diameter. Self-assembly and self-proliferation process went from ACP nanoparticles, dissolved ACP nanoparticles (less than 50 nm), twig-like structures and fibrous-like nanotubes to cellular networks. The fibrous-like nanotubes were only detected when the amount of ACP in reaction system were more than 0.01 g. The more ACP interacted with MDP, the more fibrous-like nanotubes were formed. After the dentin surfaces were treated with fibrous-like nanotube composites, MTBS could be significantly improved. Moreover, the fibrous-like nanotube structures could be resistant to acidic challenge, and were stable at least for 3 months. SIGNIFICANCE The fibrous-like nanotube structures could be self-assembled via a bottom-up approach at certain ratio of MDP and commercial ACP nanoparticles. The application of fibrous-like nanotube composites as a novel primer prior to self-etch adhesives greatly improved dentin bond strengths.
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Affiliation(s)
- Ling Zhang
- Department of Prosthodontics, The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine, Yan'an Road 395, Hangzhou, Zhejiang 310006, China; Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, Zhejiang 310006, China. zl1616-@163.com
| | - Yuedan Xu
- Department of Prosthodontics, The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine, Yan'an Road 395, Hangzhou, Zhejiang 310006, China; Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, Zhejiang 310006, China
| | - Xinyang Jin
- Department of Prosthodontics, The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine, Yan'an Road 395, Hangzhou, Zhejiang 310006, China; Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, Zhejiang 310006, China
| | - Chaoyang Wang
- Department of Prosthodontics, The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine, Yan'an Road 395, Hangzhou, Zhejiang 310006, China; Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, Zhejiang 310006, China
| | - Mingxing Li
- Department of Prosthodontics, The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine, Yan'an Road 395, Hangzhou, Zhejiang 310006, China; Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, Zhejiang 310006, China
| | - Zihuai Zhou
- Department of Prosthodontics, The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine, Yan'an Road 395, Hangzhou, Zhejiang 310006, China; Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, Zhejiang 310006, China
| | - Baiping Fu
- Department of Prosthodontics, The Affiliated Hospital of Stomatology, School of Stomatology, Zhejiang University School of Medicine, Yan'an Road 395, Hangzhou, Zhejiang 310006, China; Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, Zhejiang 310006, China.
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109
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Wang X, Zhao D, Ren H, Yan Y, Li S. Biological evaluation of the modified nano-amorphous phosphate calcium doped with citrate/poly-amino acid composite as a potential candidate for bone repair and reconstruction. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:16. [PMID: 33491099 PMCID: PMC7829244 DOI: 10.1007/s10856-020-06482-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 12/18/2020] [Indexed: 06/12/2023]
Abstract
Large numbers of research works related to fabricating organic-inorganic composite materials have been carried out to mimic the natural structure of bone. In this study, a new modified n-ACP doped with citrate (n-ACP-cit)/poly (amino acids) (PAA) composite (n-ACP-cit/PAA) was synthesized by employing high bioactive n-ACP-cit and the biodegradable and biocompatible PAA copolymer. Its basic structure was characterized by X-ray diffraction spectroscopy, Fourier transformed infrared spectroscopy, and X-ray photoelectron spectroscopy. Moreover, the degradability, bioactivity, biocompatibility, and osteoconductivity of n-ACP-cit/PAA composite were evaluated in vitro and in vivo, using simulated body fluid (SBF) solution soaking test, mouse bone marrow mesenchymal stem cells proliferation and differentiation, morphological observation test, expression of genes associated with osteogenesis, and bone defect model repair test, respectively. The modified n-ACP-cit/PAA composite exhibited a much higher weight loss rate (36.01 wt.%) than that of PAA (23.99 wt.%) after immersing in SBF solution for 16 weeks and the pH values of local environment restored to neutral condition. Moreover, cells co-culturing with composites exhibited higher alkaline phosphatase activity, more calcium nodule-formation, and higher expression levels of osteogenic differentiation-related genes (Bmp-2, Colla I, OCN, OPN, and Runx-2) than that of PAA. Furthermore, the bone defect model repair test revealed that the composite could be intimately incorporated with the surrounding bone without causing any deleterious reaction and capable of guiding new bone formation. Together, these results indicated that the new modified bone repair n-ACP-cit/PAA composite material with specific characteristics may be designed for meeting diverse requirements from biomedical applications.
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Affiliation(s)
- Xiaomei Wang
- College of Physics, Sichuan University, Chengdu, 610064, China
- Collaborative Innovation Center of Tissue Repair Material of Sichuan Province, College of Life Sciences, China West Normal University, Nanchong, 637009, China
| | - Dechuan Zhao
- Collaborative Innovation Center of Tissue Repair Material of Sichuan Province, College of Life Sciences, China West Normal University, Nanchong, 637009, China
| | - Haohao Ren
- College of Physics, Sichuan University, Chengdu, 610064, China.
| | - Yonggang Yan
- College of Physics, Sichuan University, Chengdu, 610064, China.
| | - Shuyang Li
- College of Physics, Sichuan University, Chengdu, 610064, China
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110
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Coppel Y, Prigent Y, Grégoire G. Characterization of hydrogenated dentin components by advanced 1H solid-state NMR experiments. Acta Biomater 2021; 120:156-166. [PMID: 32860946 DOI: 10.1016/j.actbio.2020.08.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 07/30/2020] [Accepted: 08/15/2020] [Indexed: 12/20/2022]
Abstract
Collecting information about molecular organisation on biological materials such as bone and dentin represents a major challenge in attaining a better understanding of their mechanical properties. To that end, solid state Nuclear Magnetic Resonance (ssNMR) spectroscopic study is an appropriate strategy to provide atomic structural details on these amorphous composite materials. However, species like water molecules and hydroxyl groups are usually observed through 1H magic angle spinning (MAS) ssNMR that suffers from poor resolution due to strong signal overlapping, making their identification difficult. This paper proposes a set of ssNMR experiments for 1H characterization of the main components of human dentin, based on homo- and hetero-nuclear dipolar couplings and composed mostly of fast 1D experiments. The 1H assignment is assisted by straightforward sample modifications: vacuum drying, deuterium exchange and demineralization. These experiments allow the hydrogen signal edition of dentin species like water molecules, HPO42- and OH- groups, depending on their localization (bound to the organic phase, linked to apatite or at the interface) and their dynamic behaviour. This ssNMR toolbox has the potential to provide important structural and dynamic information on chemical and physical modifications of biomaterials. STATEMENT OF SIGNIFICANCE: Molecular characterisation of apatitic biomaterials by biophysical techniques is extremely difficult due to their complex and amorphous nature. It is, however, crucial to obtain such information if we want to understand their mechanical properties in relation to their physical state, for example their hydration levels. In this article we used a set of solid state NMR experiments and sample modifications to distinguish 1H signal of human dentin components with a particular attention to water molecules, known for their major role in biomaterial structuring.
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Affiliation(s)
- Yannick Coppel
- Laboratoire de Chimie de Coordination UPR8241, CNRS, 205 Rte de Narbonne, F-31077, Toulouse Cedex 04, France.
| | - Yann Prigent
- Institut de Chimie de Toulouse (ICT) - FR 2599, Faculté des Sciences et de l'Ingénierie, Université Toulouse III, 31062 Toulouse, France
| | - Geneviève Grégoire
- Faculté d'Odontologie, Toulouse Cedex 31062; Unité de Recherche Biomatériaux Innovants et Interfaces EA4462/URB2i, Université Paris, 92120, France
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111
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Kis VK, Sulyok A, Hegedűs M, Kovács I, Rózsa N, Kovács Z. Magnesium incorporation into primary dental enamel and its effect on mechanical properties. Acta Biomater 2021; 120:104-115. [PMID: 32891873 DOI: 10.1016/j.actbio.2020.08.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/24/2020] [Accepted: 08/25/2020] [Indexed: 11/16/2022]
Abstract
Cross-sectional study of sound primary dental enamel revealed hardness zonation and, in parallel, significant change in the Mg content below the prismless layer. Mg content is known to play an important role in enamel apatite biomineralization, therefore, Mg ion exchange experiments were carried out on the outer surface of sound primary molars and on reference abiogenic Ca-phosphates using MgCl2 solution. Effects of Mg incorporation on crystal/particle size, ionic ratio and morphology were compared and the observed changes were explained by parallel diffusion and dissolution/reprecipitation processes. Based on depth profile analysis and high resolution electron microscopy of the Mg-exchanged dental enamel, a poorly ordered surface layer of approximately 10-15 nanometer thickness was identified. This thin layer is strongly enriched in Mg and has non-apatitic structure. Below the surface layer, the Mg content increased only moderately (up to ~3 at%) and the apatite crystal structure of enamel was preserved. As a common effect of the Mg exchanged volume, primary dental enamel exhibited about 20% increase of nanohardness, which is intrepreted by strengthening of both the thin surface layer and the region below due to the decreased crystallite size and the effect of incorporated Mg, respectively. STATEMENT OF SIGNIFICANCE: Dental enamel is the most durable mineralized tissue in the human body, which, in spite to be exposed to extreme conditions like mastication and acidic dissolution, is able to fulfill its biological function during lifetime. In this study we show that minor component magnesium can affect hardness properties of human primary dental enamel. Then, through Mg incorporation experiments we provide an additional proof for the poorly ordered Mg-containing intergranular phase which has been recently observed. Also, we report that the hardness of dental enamel can be increased by ca. 20% by Mg incorporation. These results contribute to a deeper understanding of sound primary dental enamel structure and may inspire new pathways for assisted remineralization of enamel and regenerative dentistry.
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Affiliation(s)
- Viktória K Kis
- Centre for Energy Research, H-1121 Budapest, Konkoly-Thege Miklós u. 29-33, Hungary; Institute of Environmental Sciences, University of Pannonia, H-8200 Veszprém, Egyetem út. 10. Hungary.
| | - Attila Sulyok
- Centre for Energy Research, H-1121 Budapest, Konkoly-Thege Miklós u. 29-33, Hungary
| | - Máté Hegedűs
- Departement of Materials Physics, Eötvös Loránd University, H-1119 Budapest, Pázmány Péter sétány 1/a, Hungary
| | - Ivett Kovács
- Research Centre for Astronomy and Earth Sciences, Institute for Geological and Geochemical Research, H-1112 Budapest, Budaörsi út 45, Hungary
| | - Noémi Rózsa
- Semmelweis University, Faculty of Dentistry, H-1088 Budapest, Szentkirályi u. 47, Hungary
| | - Zsolt Kovács
- Departement of Materials Physics, Eötvös Loránd University, H-1119 Budapest, Pázmány Péter sétány 1/a, Hungary.
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112
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Jiang S, Cao Y, Zong C, Pang Y, Sun Z. Appropriate regulation of magnesium on hydroxyapatite crystallization in simulated body fluids. CrystEngComm 2021. [DOI: 10.1039/d0ce01421d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The regulation effect of Mg2+ on HAP crystallization is closely related to the adding time of Mg2+. The introduction of Mg2+ in the ACP unstable stage is unable to inhibit HAP crystallization.
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Affiliation(s)
- Shuqin Jiang
- School of Public Health
- Department of Toxicology
- Capital Medical University
- Beijing 100069
- China
| | - Yuanyuan Cao
- School of Public Health
- Department of Toxicology
- Capital Medical University
- Beijing 100069
- China
| | - Chenxi Zong
- School of Basic Medicine
- Capital Medical University
- Beijing 100069
- China
| | - Yuanfeng Pang
- School of Public Health
- Department of Toxicology
- Capital Medical University
- Beijing 100069
- China
| | - Zhiwen Sun
- School of Public Health
- Department of Toxicology
- Capital Medical University
- Beijing 100069
- China
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113
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Griesiute D, Sinusaite L, Kizalaite A, Antuzevics A, Mazeika K, Baltrunas D, Goto T, Sekino T, Kareiva A, Zarkov A. The influence of Fe3+ doping on thermally induced crystallization and phase evolution of amorphous calcium phosphate. CrystEngComm 2021. [DOI: 10.1039/d1ce00371b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The present study investigates thermally induced crystallization and phase evolution of amorphous calcium phosphate (ACP) partially substituted with Fe3+ ions (M/P = 1.5 : 1).
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Affiliation(s)
- Diana Griesiute
- Institute of Chemistry
- Vilnius University
- LT-03225 Vilnius
- Lithuania
| | | | - Agne Kizalaite
- Institute of Chemistry
- Vilnius University
- LT-03225 Vilnius
- Lithuania
| | - Andris Antuzevics
- Institute of Solid State Physics
- University of Latvia
- LV-1063 Riga
- Latvia
| | - Kestutis Mazeika
- State Research Institute Center for Physical Sciences and Technology
- Vilnius LT-02300
- Lithuania
| | - Dalis Baltrunas
- State Research Institute Center for Physical Sciences and Technology
- Vilnius LT-02300
- Lithuania
| | - Tomoyo Goto
- The Institute of Scientific and Industrial Research
- Osaka University
- Osaka 567-0047
- Japan
| | - Tohru Sekino
- The Institute of Scientific and Industrial Research
- Osaka University
- Osaka 567-0047
- Japan
| | - Aivaras Kareiva
- Institute of Chemistry
- Vilnius University
- LT-03225 Vilnius
- Lithuania
| | - Aleksej Zarkov
- Institute of Chemistry
- Vilnius University
- LT-03225 Vilnius
- Lithuania
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114
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Büttner SH, Isemonger EW, Isaacs M, van Niekerk D, Sipler RE, Dorrington RA. Living phosphatic stromatolites in a low-phosphorus environment: Implications for the use of phosphorus as a proxy for phosphate levels in paleo-systems. GEOBIOLOGY 2021; 19:35-47. [PMID: 33067916 DOI: 10.1111/gbi.12415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 08/01/2020] [Accepted: 08/23/2020] [Indexed: 06/11/2023]
Abstract
In the geological record, fossil phosphatic stromatolites date back to the Great Oxidation Event in the Paleoproterozoic, but living phosphatic stromatolites have not been described previously. Here, we report on cyanobacterial stromatolites in a supratidal freshwater environment at Cape Recife, South African southern coast, precipitating Ca carbonate alternating with episodes of Ca phosphate deposition. In their structure and composition, the living stromatolites from Cape Recife closely resemble their fossilized analogues, showing phosphatic zonation, microbial casts, tunnel structures and phosphatic crusts of biogenic origin. The microbial communities appear to be also similar to those proposed to have formed fossil phosphatic stromatolites. Phosphatic domains in the material from Cape Recife are spatially and texturally associated with carbonate precipitates, but form distinct entities separated by sharp boundaries. Electron Probe Micro-Analysis shows that Ca/P ratios and the overall chemical compositions of phosphatic precipitates are in the range of octacalcium phosphate, amorphous tricalcium phosphate and apatite. The coincidence in time of the emergence of phosphatic stromatolites in the fossil record with a major episode of atmospheric oxidation led to the assumption that at times of increased oxygen release the underlying increased biological production may have been linked to elevated phosphorus availability. The stromatolites at Cape Recife, however, form in an environment where ambient phosphorus concentrations do not exceed 0.28 μM, one to two orders of magnitude below the previously predicted minimum threshold of >5 μM for biogenic phosphate precipitation in paleo-systems. Accordingly, we contest the previously proposed suitability of phosphatic stromatolites as a proxy for high ambient phosphate concentrations in supratidal to shallow ocean settings in earth history.
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Affiliation(s)
- Steffen H Büttner
- Department of Geology, Rhodes University, Makhanda (Grahamstown), South Africa
| | - Eric W Isemonger
- Department of Biochemistry and Microbiology, Rhodes University, Makhanda (Grahamstown), South Africa
| | - Michelle Isaacs
- Department of Biochemistry and Microbiology, Rhodes University, Makhanda (Grahamstown), South Africa
| | - Deon van Niekerk
- Department of Geology, Rhodes University, Makhanda (Grahamstown), South Africa
| | - Rachel E Sipler
- Department of Ocean Sciences, Memorial University of Newfoundland, St John's, NL, Canada
| | - Rosemary A Dorrington
- Department of Biochemistry and Microbiology, Rhodes University, Makhanda (Grahamstown), South Africa
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115
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Current Challenges and Innovative Developments in Hydroxyapatite-Based Coatings on Metallic Materials for Bone Implantation: A Review. COATINGS 2020. [DOI: 10.3390/coatings10121249] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Biomaterials are in use for the replacement and reconstruction of several tissues and organs as treatment and enhancement. Metallic, organic, and composites are some of the common materials currently in practice. Metallic materials contribute a big share of their mechanical strength and resistance to corrosion properties, while organic polymeric materials stand high due to their biocompatibility, biodegradability, and natural availability. To enhance the biocompatibility of these metals and alloys, coatings are frequently applied. Organic polymeric materials and ceramics are extensively utilized for this purpose due to their outstanding characteristics of biocompatibility and biodegradability. Hydroxyapatite (HAp) is the material from the ceramic class which is an ultimate candidate for coating on these metals for biomedical applications. HAp possesses similar chemical and structural characteristics to normal human bone. Due to the bioactivity and biocompatibility of HAp, it is used for bone implants for regenerating bone tissues. This review covers an extensive study of the development of HAp coatings specifically for the orthopaedic applications that include different coating techniques and the process parameters of these coating techniques. Additionally, the future direction and challenges have been also discussed briefly in this review, including the coating of HAp in combination with other calcium magnesium phosphates that occur naturally in human bone.
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116
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Chen L, Wu C, Wei D, Chen S, Xiao Z, Zhu H, Luo H, Sun J, Fan H. Biomimetic mineralized microenvironment stiffness regulated BMSCs osteogenic differentiation through cytoskeleton mediated mechanical signaling transduction. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 119:111613. [PMID: 33321656 DOI: 10.1016/j.msec.2020.111613] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 10/04/2020] [Accepted: 10/05/2020] [Indexed: 01/03/2023]
Abstract
Construction of biomimetic microenvironment is vital to understand the relationship between matrix mechanical cues and cell fate, as well as to explore potential tissue engineering scaffolds for clinical application. In this study, through the enzymatic mineralizable collagen hydrogel system, we established the biomimetic bone matrix which was capable of realizing mechanical regulation independent of mineralization by incorporation of phosphorylated molecules (vinylphosphonic acid, VAP). Then, based on the biomimetic mineralized matrix with same composition but significantly different mechanical stiffness, we further investigated the effect of matrix stiffness on osteogenic differentiation of bone marrow stromal cells (BMSCs). The results clearly demonstrated that biomimetic mineralized microenvironment with higher mechanical strength promoted osteogenic differentiation of BMSCs. Further mechanism analysis demonstrated that the mineralized hydrogel with higher stiffness promoted cytoskeletal assembly, which enhanced the expression and nuclear colocalization of YAP and RUNX2, thereby promoted the osteogenic differentiation of stem cells. This study supplies a promising material platform not only for bone tissue engineering but also for exploring the mechanism of biomimetic bone matrix mechanics on osteogenesis.
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Affiliation(s)
- Lu Chen
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, Sichuan, PR China; Institute of Regulatory Science for Medical Devices, Sichuan University, Chengdu 610064, Sichuan, PR China
| | - Chengheng Wu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, Sichuan, PR China
| | - Dan Wei
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, Sichuan, PR China
| | - Suping Chen
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, Sichuan, PR China
| | - Zhanwen Xiao
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, Sichuan, PR China
| | - Hua Zhu
- College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, PR China
| | - Hongrong Luo
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, Sichuan, PR China
| | - Jing Sun
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, Sichuan, PR China
| | - Hongsong Fan
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, Sichuan, PR China.
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117
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Kahil K, Varsano N, Sorrentino A, Pereiro E, Rez P, Weiner S, Addadi L. Cellular pathways of calcium transport and concentration toward mineral formation in sea urchin larvae. Proc Natl Acad Sci U S A 2020; 117:30957-30965. [PMID: 33229583 PMCID: PMC7733801 DOI: 10.1073/pnas.1918195117] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Sea urchin larvae have an endoskeleton consisting of two calcitic spicules. The primary mesenchyme cells (PMCs) are the cells that are responsible for spicule formation. PMCs endocytose sea water from the larval internal body cavity into a network of vacuoles and vesicles, where calcium ions are concentrated until they precipitate in the form of amorphous calcium carbonate (ACC). The mineral is subsequently transferred to the syncytium, where the spicule forms. Using cryo-soft X-ray microscopy we imaged intracellular calcium-containing particles in the PMCs and acquired Ca-L2,3 X-ray absorption near-edge spectra of these Ca-rich particles. Using the prepeak/main peak (L2'/ L2) intensity ratio, which reflects the atomic order in the first Ca coordination shell, we determined the state of the calcium ions in each particle. The concentration of Ca in each of the particles was also determined by the integrated area in the main Ca absorption peak. We observed about 700 Ca-rich particles with order parameters, L2'/ L2, ranging from solution to hydrated and anhydrous ACC, and with concentrations ranging between 1 and 15 M. We conclude that in each cell the calcium ions exist in a continuum of states. This implies that most, but not all, water is expelled from the particles. This cellular process of calcium concentration may represent a widespread pathway in mineralizing organisms.
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Affiliation(s)
- Keren Kahil
- Department of Structural Biology, Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Neta Varsano
- Department of Structural Biology, Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Andrea Sorrentino
- MISTRAL Beamline-Experiments Division, ALBA Synchrotron Light Source, Cerdanyola del Valles, 08290 Barcelona, Spain
| | - Eva Pereiro
- MISTRAL Beamline-Experiments Division, ALBA Synchrotron Light Source, Cerdanyola del Valles, 08290 Barcelona, Spain
| | - Peter Rez
- Department of Physics, Arizona State University, Tempe, AZ 85287
| | - Steve Weiner
- Department of Structural Biology, Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Lia Addadi
- Department of Structural Biology, Weizmann Institute of Science, 76100 Rehovot, Israel;
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118
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Müller WEG, Ackermann M, Al-Nawas B, Righesso LAR, Muñoz-Espí R, Tolba E, Neufurth M, Schröder HC, Wang X. Amplified morphogenetic and bone forming activity of amorphous versus crystalline calcium phosphate/polyphosphate. Acta Biomater 2020; 118:233-247. [PMID: 33075552 DOI: 10.1016/j.actbio.2020.10.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 09/18/2020] [Accepted: 10/13/2020] [Indexed: 01/11/2023]
Abstract
Amorphous Ca-phosphate (ACP) particles stabilized by inorganic polyphosphate (polyP) were prepared by co-precipitation of calcium and phosphate in the presence of polyP (15% [w/w]). These hybrid nanoparticles showed no signs of crystallinity according to X-ray diffraction analysis, in contrast to the particles obtained at a lower (5% [w/w]) polyP concentration or to hydroxyapatite. The ACP/15% polyP particles proved to be a suitable matrix for cell growth and attachment and showed pronounced osteoblastic and vasculogenic activity in vitro. They strongly stimulated mineralization of the human osteosarcoma cell line SaOS-2, as well as cell migration/microvascularization, as demonstrated in the scratch assay and the in vitro angiogenesis tube forming assay. The possible involvement of an ATP gradient, generated by polyP during tube formation of human umbilical vein endothelial cells, was confirmed by ATP-depletion experiments. In order to assess the morphogenetic activity of the hybrid particles in vivo, experiments in rabbits using the calvarial bone defect model were performed. The particles were encapsulated in poly(d,l-lactide-co-glycolide) microspheres. In contrast, to crystalline Ca-phosphate (containing only 5% [w/w] polyP) or to crystalline β-tricalcium phosphate, amorphous ACP/15% polyP particles caused pronounced osteoinductive activity already after a six-week healing period. The synthesis of new bone tissue was accompanied by an intense vascularization and an increased expression of mineralization/vascularization marker genes. The data show that amorphous polyP-stabilized ACP, which combines osteoinductive activity with the ability to act as a precursor of hydroxyapatite formation both in vitro and in vivo, is a promising material for bone regeneration.
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Affiliation(s)
- Werner E G Müller
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128 Mainz, GERMANY.
| | - Maximilian Ackermann
- Institute of Functional and Clinical Anatomy, University Medical Center of the Johannes Gutenberg University, Johann Joachim Becher Weg 13, 55099 Mainz, Germany
| | - Bilal Al-Nawas
- Clinic for Oral and Maxillofacial Surgery and Plastic Surgery, University Medical Center of the Johannes Gutenberg University, Augustusplatz 2, 55131 Mainz, GERMANY
| | - Leonardo A R Righesso
- Clinic for Oral and Maxillofacial Surgery and Plastic Surgery, University Medical Center of the Johannes Gutenberg University, Augustusplatz 2, 55131 Mainz, GERMANY
| | - Rafael Muñoz-Espí
- Institute of Materials Science (ICMUV), Universitat de València, C/Catedràtic José Beltrán 2, 46980 Paterna, València, Spain
| | - Emad Tolba
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128 Mainz, GERMANY
| | - Meik Neufurth
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128 Mainz, GERMANY
| | - Heinz C Schröder
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128 Mainz, GERMANY
| | - Xiaohong Wang
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128 Mainz, GERMANY
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119
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Siddiqui HA, Pickering KL, Mucalo MR. Study of biomorphic calcium deficient hydroxyapatite fibres derived from a natural Harakeke( Phormium tenax) leaf fibre template. BIOINSPIRATION & BIOMIMETICS 2020; 16:016015. [PMID: 32987371 DOI: 10.1088/1748-3190/abbc64] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 09/28/2020] [Indexed: 06/11/2023]
Abstract
The complex structure of natural bio-organic matter has inspired scientists to utilise these as templates to design 'biomorphic materials', which retain the intricate architecture of the materials while acting as a useful bioactive material. Biomorphic hydroxyapatite-based fibres were synthesised usingHarakekeleaf fibre as a template, which constitutes a powerful method for manufacturing bioactive ceramic fibres. Furthermore, in creating the hydroxyapatite-based fibres, a natural source of calcium and phosphate ions (from bovine bone) was utilised to create the digest solution in which the leaf fibres were immersed prior to their calcination to form the inorganic fibres. Chemical, thermogravimetric and microscopic characterisation confirmed that the final product was able to successfully replicate the shape of the fibres and furthermore be transformed into calcium deficient, bone-like hydroxyapatite.
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Affiliation(s)
- Humair A Siddiqui
- School of Engineering, University of Waikato, Hamilton 3240, New Zealand
- Department of Materials Engineering, Faculty of Chemical & Process Engineering, NED University of Engineering & Technology, Karachi 75270, Pakistan
| | - Kim L Pickering
- School of Engineering, University of Waikato, Hamilton 3240, New Zealand
| | - Michael R Mucalo
- School of Science, University of Waikato, Hamilton 3240, New Zealand
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120
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He K, Sawczyk M, Liu C, Yuan Y, Song B, Deivanayagam R, Nie A, Hu X, Dravid VP, Lu J, Sukotjo C, Lu YP, Král P, Shokuhfar T, Shahbazian-Yassar R. Revealing nanoscale mineralization pathways of hydroxyapatite using in situ liquid cell transmission electron microscopy. SCIENCE ADVANCES 2020; 6:eaaz7524. [PMID: 33208378 PMCID: PMC7673812 DOI: 10.1126/sciadv.aaz7524] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 10/06/2020] [Indexed: 05/19/2023]
Abstract
To treat impairments in hard tissues or overcome pathological calcification in soft tissues, a detailed understanding of mineralization pathways of calcium phosphate materials is needed. Here, we report a detailed mechanistic study of hydroxyapatite (HA) mineralization pathways in an artificial saliva solution via in situ liquid cell transmission electron microscopy (TEM). It is found that the mineralization of HA starts by forming ion-rich and ion-poor solutions in the saliva solution, followed by coexistence of the classical and nonclassical nucleation processes. For the nonclassical path, amorphous calcium phosphate (ACP) functions as the substrate for HA nucleation on the ACP surface, while the classical path features direct HA nucleation from the solution. The growth of HA crystals on the surface of ACP is accompanied by the ACP dissolution process. The discoveries reported in this work are important to understand the physiological and pathological formation of HA minerals, as well as to engineer the biomineralization process for bone healing and hard tissue repairs.
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Affiliation(s)
- Kun He
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA
- Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, Northwestern University, Evanston, IL 60208, USA
- School of Materials Science and Engineering, Shandong University, Ji'nan 250061, China
| | - Michal Sawczyk
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Cong Liu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Yifei Yuan
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Boao Song
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Ram Deivanayagam
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Anmin Nie
- State Key Lab of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
| | - Xiaobing Hu
- Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, Northwestern University, Evanston, IL 60208, USA
| | - Vinayak P Dravid
- Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, Northwestern University, Evanston, IL 60208, USA
| | - Jun Lu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Cortino Sukotjo
- Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Yu-Peng Lu
- School of Materials Science and Engineering, Shandong University, Ji'nan 250061, China.
| | - Petr Král
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA.
- Departments of Physics, Biopharmaceutical Sciences, and Chemical Engineering, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL 60607, USA
| | - Tolou Shokuhfar
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
- Department of Bioengineering, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Reza Shahbazian-Yassar
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
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121
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Organic molecule enhanced 1O2 electrochemiluminescence from the phase transformation of amorphous calcium phosphate. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.137062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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122
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Santhakumar S, Oyane A, Nakamura M, Koga K, Miyata S, Muratsubaki K, Miyaji H. In situ precipitation of amorphous calcium phosphate nanoparticles within 3D porous collagen sponges for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 116:111194. [DOI: 10.1016/j.msec.2020.111194] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 06/10/2020] [Accepted: 06/12/2020] [Indexed: 12/12/2022]
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123
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Sainz MA, Serena S, Belmonte M, Miranzo P, Osendi MI. Protein adsorption and in vitro behavior of additively manufactured 3D-silicon nitride scaffolds intended for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 115:110734. [PMID: 32600672 DOI: 10.1016/j.msec.2020.110734] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 11/17/2022]
Abstract
Highly porous scaffolds of Si3N4 are fabricated by direct ink writing method (Robocasting) with a pattern of macroporous cavities of 650-700μm. Two different Si3N4 ink compositions regarding the oxide sintering aids (namely, Y2O3, Al2O3, and SiO2) are tried. Both inks reach solid volume fractions of ~0.40 with about 10-12wt% of polymeric additive content that imparts the necessary pseudoplastic characteristics. The printed structures are sintered under controlled N2 atmosphere either in a conventional graphite furnace or by the spark plasma sintering technique. Skeleton of the scaffolds reaches densities above 95% of the theoretical value with ≈18-24% of linear shrinkage. Analysis of the crystalline phases, microstructure and mechanical properties are comparatively done for both compositions. The bioactivity of these structures is addressed by evaluating the ion release rate in simulated body fluid. In parallel, atomic force microscopy is used to determine the effect of the filaments surface roughness on protein adsorption (Bovine Serum Albumin) for assessing the potential application of 3D-Si3N4 scaffolds in bone regeneration.
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Affiliation(s)
| | - Sara Serena
- Institute of Ceramics and Glass (ICV-CSIC), Madrid 28049, Spain
| | - Manuel Belmonte
- Institute of Ceramics and Glass (ICV-CSIC), Madrid 28049, Spain
| | - Pilar Miranzo
- Institute of Ceramics and Glass (ICV-CSIC), Madrid 28049, Spain
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Zhang Q, Wang W, Schmelzer E, Gerlach J, Liu C, Nettleship I. The degradation behavior of calcium-rich hydroxyapatite foams in vitro. J Biomed Mater Res A 2020; 109:859-868. [PMID: 32997885 DOI: 10.1002/jbm.a.37077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 06/15/2020] [Accepted: 06/23/2020] [Indexed: 11/12/2022]
Abstract
Hydroxyapatite (HA) is a well-known regenerative biomaterial. However, the slow degradation rate of HA is still an obstacle in clinical applications. In this study, we concentrated on investigating the degradation behavior of the calcium-rich HA foams, which had a demonstrated effect on blood differentiation in previous studies. The HA foams were processed by an emulsion method and were infiltrated with calcium nitrate to create a calcium carbonate second phase, heterogeneously distributed on and under the surface of the foam. During the 28-day solubility test, the calcium carbonate phase contributed to enhanced Ca2+ ion release into the saline compared to phase pure HA foams. Both types of foams were biocompatible as demonstrated by human endothelial cell culture on their surface. The release of calcium ions, the degradation behavior, and the endothelial cell differentiation behavior suggest this biphasic ceramic is a candidate for bone marrow in vitro culture and a possible bone substitute material.
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Affiliation(s)
- Qinghao Zhang
- Material Science and Engineering School, East China University of Science and Technology, Shanghai, China.,Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Wenfu Wang
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Eva Schmelzer
- Department of Surgery, McGowan Institute of Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jörg Gerlach
- Department of Surgery, McGowan Institute of Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Changsheng Liu
- Material Science and Engineering School, East China University of Science and Technology, Shanghai, China
| | - Ian Nettleship
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Surgery, McGowan Institute of Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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125
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Ortiz-Gómez I, Ramírez-Rodríguez GB, Capitán-Vallvey LF, Salinas-Castillo A, Delgado-López JM. Highly stable luminescent europium-doped calcium phosphate nanoparticles for creatinine quantification. Colloids Surf B Biointerfaces 2020; 196:111337. [PMID: 32949922 DOI: 10.1016/j.colsurfb.2020.111337] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/31/2020] [Accepted: 08/13/2020] [Indexed: 11/28/2022]
Abstract
The determination of creatinine levels is essential for the detection of renal and muscular dysfunction. Luminescent nanoparticles are emerging as fast, cheap and highly selective sensors for the detection and quantification of creatinine. Nevertheless, current nanosensors only have a short shelf life due to their poor chemical and colloidal stability, which limits their clinical functionality. In this work, we have developed a highly stable, selective and sensitive nanosensor based on europium-doped, amorphous calcium phosphate nanoparticles (Eu-ACP) for the determination of creatinine by luminescence spectroscopy. The colloidal stability of Eu-ACP nanoparticles in aqueous solutions was optimised to ensure a constant signal after up to 4 months in storage. The luminescence intensity of Eu-ACP decreased linearly with the creatinine concentration over the range of 1-120 μM (R2 = 0.995). This concentration-response relationship was used to determine creatinine levels in real urine samples resulting in good recovery percentages. Significantly, selectivity assays indicated that none of the potential interfering species provoked discernible changes in the luminescence intensity.
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Affiliation(s)
- Inmaculada Ortiz-Gómez
- Department of Analytical Chemistry, University of Granada, Faculty of Science, Av. Fuente Nueva, s/n, 18071 Granada, Spain; Unit of Excellence in Chemistry applied to Biomedicine and the Environment of the University of Granada, Spain
| | - Gloria B Ramírez-Rodríguez
- Department of Inorganic Chemistry, University of Granada, Faculty of Science, Av. Fuente Nueva, s/n, 18071 Granada, Spain; Unit of Excellence in Chemistry applied to Biomedicine and the Environment of the University of Granada, Spain.
| | - Luis F Capitán-Vallvey
- Department of Analytical Chemistry, University of Granada, Faculty of Science, Av. Fuente Nueva, s/n, 18071 Granada, Spain; Unit of Excellence in Chemistry applied to Biomedicine and the Environment of the University of Granada, Spain
| | - Alfonso Salinas-Castillo
- Department of Analytical Chemistry, University of Granada, Faculty of Science, Av. Fuente Nueva, s/n, 18071 Granada, Spain; Unit of Excellence in Chemistry applied to Biomedicine and the Environment of the University of Granada, Spain
| | - José M Delgado-López
- Department of Inorganic Chemistry, University of Granada, Faculty of Science, Av. Fuente Nueva, s/n, 18071 Granada, Spain; Unit of Excellence in Chemistry applied to Biomedicine and the Environment of the University of Granada, Spain.
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126
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Structural Biology of Calcium Phosphate Nanoclusters Sequestered by Phosphoproteins. CRYSTALS 2020. [DOI: 10.3390/cryst10090755] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Biofluids that contain stable calcium phosphate nanoclusters sequestered by phosphopeptides make it possible for soft and hard tissues to co-exist in the same organism with relative ease. The stability diagram of a solution of nanocluster complexes shows how the minimum concentration of phosphopeptide needed for stability increases with pH. In the stable region, amorphous calcium phosphate cannot precipitate. Nevertheless, if the solution is brought into contact with hydroxyapatite, the crystalline phase will grow at the expense of the nanocluster complexes. The physico-chemical principles governing the formation, composition, size, structure, and stability of the complexes are described. Examples are given of complexes formed by casein, osteopontin, and recombinant phosphopeptides. Application of these principles and properties to blood serum, milk, urine, and resting saliva is described to show that under physiological conditions they are in the stable region of their stability diagram and so cannot cause soft tissue calcification. Stimulated saliva, however, is in the metastable region, consistent with its role in tooth remineralization. Destabilization of biofluids, with consequential ill-effects, can occur when there is a failure of homeostasis, such as an increase in pH without a balancing increase in the concentration of sequestering phosphopeptides.
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Carmona FJ, Dal Sasso G, Bertolotti F, Ramírez-Rodríguez GB, Delgado-López JM, Pedersen JS, Masciocchi N, Guagliardi A. The role of nanoparticle structure and morphology in the dissolution kinetics and nutrient release of nitrate-doped calcium phosphate nanofertilizers. Sci Rep 2020; 10:12396. [PMID: 32709936 PMCID: PMC7382453 DOI: 10.1038/s41598-020-69279-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 06/09/2020] [Indexed: 01/06/2023] Open
Abstract
Bio-inspired synthetic calcium phosphate (CaP) nanoparticles (NPs), mimicking the mineral component of bone and teeth, are emergent materials for sustainable applications in agriculture. These sparingly soluble salts show self-inhibiting dissolution processes in undersaturated aqueous media, the control at the molecular and nanoscale levels of which is not fully elucidated. Understanding the mechanisms of particle dissolution is highly relevant to the efficient delivery of macronutrients to the plants and crucial for developing a valuable synthesis-by-design approach. It has also implications in bone (de)mineralization processes. Herein, we shed light on the role of size, morphology and crystallinity in the dissolution behaviour of CaP NPs and on their nitrate doping for potential use as (P,N)-nanofertilizers. Spherical fully amorphous NPs and apatite-amorphous nanoplatelets (NPLs) in a core-crown arrangement are studied by combining forefront Small-Angle and Wide-Angle X-ray Total Scattering (SAXS and WAXTS) analyses. Ca2+ ion release rates differ for spherical NPs and NPLs demonstrating that morphology plays an active role in directing the dissolution kinetics. Amorphous NPs manifest a rapid loss of nitrates governed by surface-chemistry. NPLs show much slower release, paralleling that of Ca2+ ions, that supports both detectable nitrate incorporation in the apatite structure and dissolution from the core basal faces.
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Affiliation(s)
- Francisco J Carmona
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, 22100, Como, Italy
| | - Gregorio Dal Sasso
- Institute of Crystallography and To.Sca.Lab, Consiglio Nazionale Delle Ricerche, Via Valleggio 11, 22100, Como, Italy
| | - Federica Bertolotti
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, 22100, Como, Italy
| | - Gloria B Ramírez-Rodríguez
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, 22100, Como, Italy
- Department of Inorganic Chemistry, University of Granada, Av. Fuentenueva S/N, 18071, Granada, Spain
| | - José M Delgado-López
- Department of Inorganic Chemistry, University of Granada, Av. Fuentenueva S/N, 18071, Granada, Spain
| | - Jan Skov Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus, Denmark
| | - Norberto Masciocchi
- Department of Science and High Technology and To.Sca.Lab, University of Insubria, Via Valleggio 11, 22100, Como, Italy.
| | - Antonietta Guagliardi
- Institute of Crystallography and To.Sca.Lab, Consiglio Nazionale Delle Ricerche, Via Valleggio 11, 22100, Como, Italy.
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128
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Microwave processing of calcium phosphate and magnesium phosphate based orthopedic bioceramics: A state-of-the-art review. Acta Biomater 2020; 111:29-53. [PMID: 32447068 DOI: 10.1016/j.actbio.2020.05.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 05/13/2020] [Accepted: 05/14/2020] [Indexed: 01/09/2023]
Abstract
The main theme of this paper is to review microwave-assisted synthesis and processing of calcium and magnesium phosphate bioceramics. Microwave processing of advanced materials has been an active field of research for the last three decades and has been already reviewed in the literature. Microwave processing of bioceramics is being pursued for almost the same period of time. Unfortunately, to the best of our knowledge, we are not aware of any comprehensive review in the literature. Our group has been a significant contributor to the field, and we feel that it is an appropriate time for reviewing the state-of-the-art of the field. The paper is divided into several sections. After rationalizing the motivation behind writing this paper in the introduction, the second section builds on some fundamental aspects of microwave-matter interactions. The third section, representing the synthesis aspects, is subdivided into five sub-sections focusing on various calcium and magnesium phosphates in both crystalline and amorphous forms. The fourth section focuses on magnesium phosphate-based bioceramics. The fifth and the sixth section describe results on the utility of microwave assistance in developing multi-functional coatings on medical implants and orthopedic cements respectively. The subsequent section reviews results on microwave sintering of calcium and magnesium phosphates. The paper concludes with remarks on unresolved issues and future directions of research. It is expected that this comprehensive review on the interdisciplinary topic will further propel the exploration of other novel applications of microwave technology in processing biomaterials by a diverse group of scientists and engineers. STATEMENT OF SIGNIFICANCE: 1. This review highlights the broad-spectrum capabilities of microwave applications in processing orthopedic bioceramics. 2. The article covers "processing" in the broadest sense of the word, comprising of material synthesis, sintering, coating formation, and setting of orthopedic cements. It also expands beyond conventional calcium phosphates to include the emergent family of magnesium phosphates. 3. In vitro/in vivo responses of microwave-processed bioceramics are discussed thus providing an integral understanding of biological aspects of these materials. 4. The comprehensive review on this interdisciplinary topic will help researchers in various disciplines to appreciate the significance and usefulness of microwaves in biomaterials processing. Further, we also believe that it will propel the exploration of other novel applications of microwave technology in the biomaterials sector.
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Sikder P, Ferreira JA, Fakhrabadi EA, Kantorski KZ, Liberatore MW, Bottino MC, Bhaduri SB. Bioactive amorphous magnesium phosphate-polyetheretherketone composite filaments for 3D printing. Dent Mater 2020; 36:865-883. [PMID: 32451208 PMCID: PMC7359049 DOI: 10.1016/j.dental.2020.04.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/29/2020] [Accepted: 04/16/2020] [Indexed: 12/25/2022]
Abstract
OBJECTIVE The aim of this study was to develop bioactive and osseointegrable polyetheretherketone (PEEK)-based composite filaments melt-blended with novel amorphous magnesium phosphate (AMP) particles for 3D printing of dental and orthopedic implants. MATERIALS AND METHODS A series of materials and biological analyses of AMP-PEEK were performed. Thermal stability, thermogravimetric and differential scanning calorimetry curves of as-synthesized AMP were measured. Complex viscosity, elastic modulus and viscous modulus were determined using a rotational rheometer. In vitro bioactivity was analyzed using SBF immersion method. SEM, EDS and XRD were used to study the apatite-forming ability of the AMP-PEEK filaments. Mouse pre-osteoblasts (MC3T3-E1) were cultured and analyzed for cell viability, proliferation and gene expression. For in vivo analyses, bare PEEK was used as the control and 15AMP-PEEK was chosen based on its in vitro cell-related results. After 4 or 12 weeks, animals were euthanized, and the femurs were collected for micro-computed tomography (μ-CT) and histology. RESULTS The collected findings confirmed the homogeneous dispersion of AMP particles within the PEEK matrix with no phase degradation. Rheological studies demonstrated that AMP-PEEK composites are good candidates for 3D printing by exhibiting high zero-shear and low infinite-shear viscosities. In vitro results revealed enhanced bioactivity and superior pre-osteoblast cell function in the case of AMP-PEEK composites as compared to bare PEEK. In vivo analyses further corroborated the enhanced osseointegration capacity for AMP-PEEK implants. SIGNIFICANCE Collectively, the present investigation demonstrated that AMP-PEEK composite filaments can serve as feedstock for 3D printing of orthopedic and dental implants due to enhanced bioactivity and osseointegration capacity.
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Affiliation(s)
- Prabaha Sikder
- Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, Toledo, OH 43606, USA
| | - Jessica A Ferreira
- Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA
| | | | - Karla Z Kantorski
- Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA; Post-Graduate Program in Oral Science (Periodontology Unit), School of Dentistry, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | | | - Marco C Bottino
- Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Sarit B Bhaduri
- Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, Toledo, OH 43606, USA; EEC Division, Directorate of Engineering, The National Science Foundation, Alexandria, VA 22314, USA.
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131
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De Bonis A, Uskoković V, Barbaro K, Fadeeva I, Curcio M, Imperatori L, Teghil R, Rau JV. Pulsed laser deposition temperature effects on strontium-substituted hydroxyapatite thin films for biomedical implants. Cell Biol Toxicol 2020; 36:537-551. [PMID: 32377851 DOI: 10.1007/s10565-020-09527-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 04/14/2020] [Indexed: 02/08/2023]
Abstract
Substituting small molecule drugs with abundant and easily affordable ions may have positive effects on the way countless disease treatments are approached. The interest in strontium cation in bone therapies soared in the wake of the success of strontium ranelate in the treatment of osteoporosis. A new method for producing thin strontium-containing hydroxyapatite (Sr-HA, Ca9Sr(PO4)6(OH)2) films as coatings that render bioinert titanium implant bioactive is reported here. The method is based on the combination of a mechanochemical synthesis of Sr-HA targets and their deposition in form of thin films on top of titanium with the use of laser ablation at low pressure. The films were 1-2 μm in thickness and their formation was studied at different temperatures, including 25, 300, and 500 °C. Highly crystalline Sr-HA target transformed during pulsed laser deposition to a fully amorphous film, whose degree of long-range order recovered with temperature. Particle edges became somewhat sharper and surface roughness moderately increased with temperature, but the (Ca+Sr)/P atomic ratio, which increased 1.5 times during the film formation, remained approximately constant at different temperatures. Despite the mostly amorphous structure of the coatings, their affinity for capturing atmospheric carbon dioxide and accommodating it as carbonate ions that replace both phosphates and hydroxyls of HA was confirmed in an X-ray photoelectron spectroscopic analysis. As the film deposition temperature increased, the lattice voids got reduced in concentration and the structure gradually "closed," becoming more compact and entailing a linear increase in microhardness with temperature, by 0.03 GPa/°C for the entire 25-500 °C range. Biocompatibility and bioactivity of Sr-HA thin films deposited on titanium were confirmed in an interaction with dental pulp stem cells, suggesting that these coatings, regardless of the processing temperature, may be viable candidates for the surface components of metallic bone implants.
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Affiliation(s)
- Angela De Bonis
- Dipartimento di Scienze, Università della Basilicata, Via dell'Ateneo Lucano, 10, 85100, Potenza, Italy
| | - Vuk Uskoković
- Department of Mechanical and Aerospace Engineering, University of California Irvine, Engineering Gateway 4200, Irvine, CA, 92697, USA
| | - Katia Barbaro
- Istituto Zooprofilattico Sperimentale Lazio e Toscana "M. Aleandri", Via Appia Nuova, 1411, 00178, Rome, Italy
| | - Inna Fadeeva
- AA Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninsky prospect 49, Moscow, Russia, 119991
| | - Mariangela Curcio
- Dipartimento di Scienze, Università della Basilicata, Via dell'Ateneo Lucano, 10, 85100, Potenza, Italy
| | - Luca Imperatori
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere 100, 00133, Rome, Italy
| | - Roberto Teghil
- Dipartimento di Scienze, Università della Basilicata, Via dell'Ateneo Lucano, 10, 85100, Potenza, Italy
| | - Julietta V Rau
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere 100, 00133, Rome, Italy.
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Berg C, Unosson E, Engqvist H, Xia W. Amorphous Calcium Magnesium Phosphate Particles for Treatment of Dentin Hypersensitivity: A Mode of Action Study. ACS Biomater Sci Eng 2020; 6:3599-3607. [PMID: 33463162 DOI: 10.1021/acsbiomaterials.0c00262] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Occlusion of exposed dentin tubules may eliminate or reduce dentin hypersensitivity by hindering fluid movements within the tubules. In this study, the mode of action of spherical particles of amorphous calcium magnesium phosphate (180-440 nm in diameter) was studied. A degradation study of the particles in Tris-HCl buffer showed that the particles continuously released Ca2+, Mg2+, and phosphate, and XRD analysis revealed the formation of hydroxyapatite (HA) after 1 week. The occluding effect and efficacy of the spherical particles as an occluding agent were evaluated in an in vitro study. The ACMP particles were incorporated in a gel intended for at-home use and tested on extracted human molars. Application of the particles followed by incubation in artificial saliva resulted in occlusion of exposed tubules, and examination with SEM showed that the particles could penetrate the tubules down to 100 μm from the dentin surface. Transformation of the particles into nanocrystalline HA-structures (nanoHA) was initiated at the dentin surface within 12 h of application, and tubule penetration of the particles, accompanied by further ion release and diffusion of ions, resulted in deep intratubular occlusion in the majority of the tubules within 3 days from application. NanoHA was tightly adhered to the tubule walls, filling the entire tubule volume after 7 days. The results of this study demonstrate the mode of action of the amorphous calcium magnesium phosphate particles in occluding exposed dentin tubules. Interaction with saliva and transformation of the particles within the tubules inducing further mineralization indicate that the particles may be used as an effective treatment to reduce dentin hypersensitivity.
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Affiliation(s)
- Camilla Berg
- Division of Applied Materials Science, Department of Materials Science and Engineering, Uppsala University, Uppsala, Sweden, 75121
| | - Erik Unosson
- Division of Applied Materials Science, Department of Materials Science and Engineering, Uppsala University, Uppsala, Sweden, 75121
| | - Håkan Engqvist
- Division of Applied Materials Science, Department of Materials Science and Engineering, Uppsala University, Uppsala, Sweden, 75121
| | - Wei Xia
- Division of Applied Materials Science, Department of Materials Science and Engineering, Uppsala University, Uppsala, Sweden, 75121
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133
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Calcium phosphate formation on TiO2 nanomaterials of different dimensionality. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124615] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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134
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Yao Q, Jiang Y, Tan S, Fu X, Li B, Liu L. Composition and bioactivity of calcium phosphate coatings on anodic oxide nanotubes formed on pure Ti and Ti-6Al-4V alloy substrates. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110687. [DOI: 10.1016/j.msec.2020.110687] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 01/12/2020] [Accepted: 01/21/2020] [Indexed: 01/31/2023]
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135
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Ullah I, Zhang W, Yang L, Ullah MW, Atta OM, Khan S, Wu B, Wu T, Zhang X. Impact of structural features of Sr/Fe co-doped HAp on the osteoblast proliferation and osteogenic differentiation for its application as a bone substitute. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110633. [PMID: 32204069 DOI: 10.1016/j.msec.2020.110633] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/27/2019] [Accepted: 01/02/2020] [Indexed: 01/07/2023]
Abstract
The potential of external ions doped biomaterials has been extensively explored; however, the co-doped biomaterials remain typically unexplored for their biological properties for precise biomedical applications. The current study was aimed to explore the impact of structural features of Sr/Fe co-doped hydroxyapatite (HAp) bionanomaterial on osteoblastic proliferation and osteogenic differentiation for its application as a bone substitute. A 10 mol% isomorphous co-doping of strontium and iron with respect to calcium was carried into HAp in the solid solution. Raman spectroscopy verified the presence of major functional groups of apatite structure together with the carbonate peaks. The Sr/Fe co-doped HAp bionanomaterials showed slightly negative zeta potential (at neutral pH), versatile DLS particle size (140-205 nm), high BET surface area (186 m2/g), and narrow width pore size (13-19 nm). TG/DTA analysis showed low thermal stability of the Sr/Fe co-doped HAp groups. The nanoparticles showed an initial burst release of amoxicillin for 15 h followed by extended-release up to 81 h and demonstrated an excellent antibacterial activity by producing inhibition zones of 17.6 ± 0.3 mm and 19.5 mm ± 0.4 mm for Escherichia coli and Staphylococcus aureus. Live/dead cell staining and MTT assay confirmed the non-toxic nature of Sr/Fe co-doped HAp bionanomaterial towards MC3T3-E1 cells. Further, an improved ALP activity, increased calcium deposition, enhanced RUNX2 expression, and regulated OPN and OCN expression levels suggest in MC3T3-E1 cells demonstrate the maturation of osteoblasts. This study provides the unique advantages of the co-doping approach for the applications Sr/Fe co-doped HAp bionanomaterials as a bone substitute.
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Perumal G, Sivakumar PM, Nandkumar AM, Doble M. Synthesis of magnesium phosphate nanoflakes and its PCL composite electrospun nanofiber scaffolds for bone tissue regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 109:110527. [DOI: 10.1016/j.msec.2019.110527] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 11/03/2019] [Accepted: 12/05/2019] [Indexed: 01/13/2023]
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Cao X, Wang G, Wang K, Guo L, Cao Y, Cao X, Yang Y. Organic Phosphorous and Calcium Source Induce the Synthesis of Yolk-Shell Structured Microspheres of Calcium Phosphate with High-Specific Surface Area: Application in HEL Adsorption. NANOSCALE RESEARCH LETTERS 2020; 15:69. [PMID: 32232586 PMCID: PMC7105591 DOI: 10.1186/s11671-020-03298-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 03/13/2020] [Indexed: 06/10/2023]
Abstract
Yolk-shell-structured calcium phosphate microspheres have a great potential for medical applications due to their excellent physicochemical properties and biocompatibility. However, developing a yolk-shell-structured calcium phosphate with high adsorption capability remains a challenge. Herein, a porous yolk-shell-structured microsphere (ATP-CG) of calcium phosphate with high-specific surface area [SBET = 143 m2 g-1, which is approximately three times as high as that of ATP-CL microspheres synthesized by replacing calcium source with calcium L-lactate pentahydrate (CL)] was successfully synthesized by using adenosine 5'-triphosphate disodium salt (ATP) as the phosphorous source and calcium gluconate monohydrate (CG) as calcium source through a self-templating approache. The influences of molar ratio of Ca to P (Ca/P), hydrothermal temperature, and time on the morphology of ATP-CG microspheres were also investigated. It is found that the organic calcium source and organic phosphorous source play a vital role in the formation of yolk-shell structure. Furthermore, a batch of adsorption experiments were investigated to illuminate the adsorption mechanism of two kinds of yolk-shell-structured microspheres synthesized with different calcium sources. The results show that the adsorption capacity of ATP-CG microspheres (332 ± 36 mg/g) is about twice higher than that of ATP-CL microspheres (176 ± 33 mg/g). Moreover, the higher-specific surface area caused by the calcium source and unique surface chemical properties for ATP-CG microspheres play an important role in the improvement of HEL adsorption capability. The study indicates that the as-prepared yolk-shell-structured microsphere is promising for application in drug delivery fields and provides an effective approach for improving drug adsorption capability.
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Affiliation(s)
- Xianshuo Cao
- College of Life Science and Pharmacy, School of Materials Science and Engineering; State Key Laboratory of Marine Resource Utilization in South China Sea, College of Food Science and Engineering, Analytical and Testing Centre, Hainan University, Haikou, 570228, People's Republic of China
| | - Guizhen Wang
- College of Life Science and Pharmacy, School of Materials Science and Engineering; State Key Laboratory of Marine Resource Utilization in South China Sea, College of Food Science and Engineering, Analytical and Testing Centre, Hainan University, Haikou, 570228, People's Republic of China
| | - Kai Wang
- Department of Biochemistry and Molecular Biology, Hainan Medical College, Haikou, 571199, People's Republic of China
| | - Lan Guo
- College of Life Science and Pharmacy, School of Materials Science and Engineering; State Key Laboratory of Marine Resource Utilization in South China Sea, College of Food Science and Engineering, Analytical and Testing Centre, Hainan University, Haikou, 570228, People's Republic of China
| | - Yang Cao
- College of Life Science and Pharmacy, School of Materials Science and Engineering; State Key Laboratory of Marine Resource Utilization in South China Sea, College of Food Science and Engineering, Analytical and Testing Centre, Hainan University, Haikou, 570228, People's Republic of China
| | - Xianying Cao
- College of Life Science and Pharmacy, School of Materials Science and Engineering; State Key Laboratory of Marine Resource Utilization in South China Sea, College of Food Science and Engineering, Analytical and Testing Centre, Hainan University, Haikou, 570228, People's Republic of China.
| | - Yong Yang
- College of Life Science and Pharmacy, School of Materials Science and Engineering; State Key Laboratory of Marine Resource Utilization in South China Sea, College of Food Science and Engineering, Analytical and Testing Centre, Hainan University, Haikou, 570228, People's Republic of China.
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Introducing the crystalline phase of dicalcium phosphate monohydrate. Nat Commun 2020; 11:1546. [PMID: 32210234 PMCID: PMC7093545 DOI: 10.1038/s41467-020-15333-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 03/04/2020] [Indexed: 12/16/2022] Open
Abstract
Calcium orthophosphates (CaPs) are important in geology, biomineralization, animal metabolism and biomedicine, and constitute a structurally and chemically diverse class of minerals. In the case of dicalcium phosphates, ever since brushite (CaHPO4·2H2O, dicalcium phosphate dihydrate, DCPD) and monetite (CaHPO4, dicalcium phosphate, DCP) were first described in 19th century, the form with intermediary chemical formula CaHPO4·H2O (dicalcium phosphate monohydrate, DCPM) has remained elusive. Here, we report the synthesis and crystal structure determination of DCPM. This form of CaP is found to crystallize from amorphous calcium hydrogen phosphate (ACHP) in water-poor environments. The crystal structure of DCPM is determined to show a layered structure with a monoclinic symmetry. DCPM is metastable in water, but can be stabilized by organics, and has a higher alkalinity than DCP and DCPD. This study serves as an inspiration for the future exploration of DCPM's potential role in biomineralization, or biomedical applications.
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139
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Yoshihara K, Nagaoka N, Nakamura A, Hara T, Hayakawa S, Yoshida Y, Van Meerbeek B. Three-dimensional observation and analysis of remineralization in dentinal caries lesions. Sci Rep 2020; 10:4387. [PMID: 32152430 PMCID: PMC7062784 DOI: 10.1038/s41598-020-61111-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 02/10/2020] [Indexed: 11/30/2022] Open
Abstract
The remineralization mechanism in dental caries lesions is not completely understood. This study reports on ultrastructural and chemical changes observed within arrested caries lesions. Carious human teeth were observed using scanning electron microscopy (SEM) and focused-ion-beam (FIB)-SEM. The crystals detected in the caries lesions were characterized by transmission electron microscopy (TEM), along with chemical element mapping using energy-dispersive spectroscopy (EDS)-STEM. FIB-SEM 3D reconstructions revealed a severely damaged dentin surface abundantly covered by bacteria. Although the dentin tubules were clogged up to a depth of 100 μm, bacterial invasion into dentin tubules was not observed. TEM crystal analysis and EDS-STEM revealed the presence of Ca and P, as well as of Mg within the HAp crystals deposited inside the dentin tubules. It was concluded that extensive remineralization with deposition of Mg-HAp crystals had occurred in dentin tubules of caries-arrested dentin. Understanding the natural remineralization process is thought to be helpful for developing clinical biomimetic remineralization protocols.
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Affiliation(s)
- Kumiko Yoshihara
- National Institute of Advanced Industrial Science and Technology (AIST), Health Research Institute, 2217-14 Hayashi-Cho, Takamaysu, Kagawa, 761-0395, Japan. .,Okayama University, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Department of Pathology & Experimental Medicine, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan.
| | - Noriyuki Nagaoka
- Okayama University Dental School, Advanced Research Center for Oral and Craniofacial Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558, Japan
| | - Akiko Nakamura
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| | - Toru Hara
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| | - Satoshi Hayakawa
- Okayama University, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Biomaterials Laboratory, 3-1-1, Tsushima-naka, Kita-ku, Okayama, 700-8530, Japan
| | - Yasuhiro Yoshida
- Hokkaido University, Faculty of Dental Medicine, Department of Biomaterials and Bioengineering, Kita 13, Nishi 7, Kita-ku, Sapporo, Hokkaido, 060-8586, Japan
| | - Bart Van Meerbeek
- KU Leuven (University of Leuven), Department of Oral Health Research, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, Kapucijnenvoer 7, 3000, Leuven, Belgium
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140
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Zhang J, Wang L, Zhang W, Putnis CV. Phosphorylated/Nonphosphorylated Motifs in Amelotin Turn Off/On the Acidic Amorphous Calcium Phosphate-to-Apatite Phase Transformation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2102-2109. [PMID: 32036670 DOI: 10.1021/acs.langmuir.9b02735] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Amelotin (AMTN) as a matrix protein exerts a direct effect on biomineralization by modulating apatite (HAP) formation during the dental enamel maturation stage through the specific interaction of a potentially phosphorylated Ser-Ser-Glu-Glu-Leu (SSEEL) peptide fragment with calcium phosphate (Ca-P) surfaces. However, the roles of (non)phosphorylation of this evolutionarily conserved subdomain within AMTN remain poorly understood. Here, we show, by time-resolved atomic force microscopy (AFM) imaging of in situ HAP crystallization via the HPO42--rich amorphous calcium phosphate (acidic ACP), the on/off switching of the phase transformation process through a nonphosphorylation-to-phosphorylation transition of the SSEEL motif. Using high-resolution transmission electron microscopy (HRTEM), we observed that the acidic ACP phase is stabilized by the phosphorylated SSEEL motif, delaying its transformation to HAP, whereas the nonphosphorylated counterpart promotes HAP formation by accelerating the dissolution-recrystallization of the acidic ACP substrate. Dynamic force spectroscopy measurements demonstrate greater binding energies of nonphosphorylated SSEEL to the acidic ACP substrate by the formation of molecular peptide-ACP bonding, explaining the enhanced dissolution of the acidic ACP substrate by stronger complexion with surface Ca2+ ions. Our findings demonstrate direct evidence for the switching role of (non)phosphorylation of an evolutionarily conserved subdomain within AMTN in controlling the phase transition of growing enamel and designing tissue regeneration biomaterials.
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Affiliation(s)
- Jing Zhang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Lijun Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenjun Zhang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Christine V Putnis
- Institut für Mineralogie, University of Münster, 48149 Münster, Germany
- Department of Chemistry, Curtin University, Perth 6845, Australia
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141
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Solesio ME, Garcia Del Molino LC, Elustondo PA, Diao C, Chang JC, Pavlov EV. Inorganic polyphosphate is required for sustained free mitochondrial calcium elevation, following calcium uptake. Cell Calcium 2020; 86:102127. [PMID: 31954928 PMCID: PMC7024051 DOI: 10.1016/j.ceca.2019.102127] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/17/2019] [Accepted: 11/19/2019] [Indexed: 01/17/2023]
Abstract
Mitochondrial free calcium is critically linked to the regulation of cellular metabolism. Free ionic calcium concentration within these organelles is determined by the interplay between two processes: exchange across the mitochondrial inner membrane and calcium-buffering within the matrix. During stimulated calcium uptake, calcium is primarily buffered by orthophosphate, preventing calcium toxicity while allowing for well-regulated yet elevated calcium loads. However, if limited to orthophosphates only, this buffering system is expected to lead to the irreversible formation of insoluble precipitates, which are not observed in living cells, under physiological conditions. Here, we demonstrate that the regulation of free mitochondrial calcium requires the presence of free inorganic polyphosphate (polyP) within the organelle. We found that the overexpression of a mitochondrial-targeted enzyme hydrolyzing polyP leads to the loss of the cellular ability to maintain elevated calcium concentrations within the organelle, following stimulated cytoplasmic signal. We hypothesize that the presence of polyP prevents the formation of calcium-phosphate insoluble clusters, allowing for the maintenance of elevated free calcium levels, during stimulated calcium uptake.
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Affiliation(s)
- Maria E Solesio
- Department of Basic Sciences, New York University, New York, NY, USA
| | | | - Pia A Elustondo
- Department of Physiology and Biophysics, Dalhousie University, Halifax, NS, Canada
| | - Catherine Diao
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada
| | - Joshua C Chang
- Epidemiology and Biostatistics Section, Rehabilitation Medicine, Clinical Center, The National Institutes of Health, Bethesda, MD, USA; Laboratory of Biological Modeling, National Institute of Diabetes and Digestive and Kidney Diseases, The National Institutes of Health, Bethesda, MD, USA
| | - Evgeny V Pavlov
- Department of Basic Sciences, New York University, New York, NY, USA.
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142
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Yang T, Xie P, Wu Z, Liao Y, Chen W, Hao Z, Wang Y, Zhu Z, Teng W. The Injectable Woven Bone-Like Hydrogel to Perform Alveolar Ridge Preservation With Adapted Remodeling Performance After Tooth Extraction. Front Bioeng Biotechnol 2020; 8:119. [PMID: 32154241 PMCID: PMC7047753 DOI: 10.3389/fbioe.2020.00119] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 02/06/2020] [Indexed: 02/05/2023] Open
Abstract
Grafting bone substitute is paramount to prevent the alveolar ridge resorption after tooth extraction and facilitate the subsequent implant treatment. An ideal bone substitute should acquire the excellent osteogenic property, more importantly, possess the suitable remodeling rate in balance with bone formation and desirable clinical manageability. However, none of bone substitute is simultaneously characterized by these features, and currently, the limited remodeling property leads to the excessive waiting time before implantation. Enlightened by woven bone, the transitional tissue that is able to induce osteogenesis during bone healing could be easily remodeled within a short period and depend on the favorable injectability of hydrogel, an injectable woven bone-like hydrogel (IWBLH) was constructed in this study to address the above problems. To mimic the component and hierarchical structure of woven bone, amorphous calcium phosphate (ACP) and mineralized collagen fibril were synthesized and compounded with alginate to form IWBLHs with various ratio. Screened by physiochemical characterization and in vitro biological assays, an optimal IWBLH was selected and further explored in rat model of tooth extraction. Compared with the most widely used bone substitute, we showed that IWBLH could be easily handled to fully fill the tooth socket, perform a comparable function to prevent the alveolar bone resorption, and completely remodeled within 4 weeks. This IWBLH stands as a promising candidate for alveolar ridge preservation (ARP) in future.
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Affiliation(s)
- Tao Yang
- Department of Prosthodontics, Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Peng Xie
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Zhenzhen Wu
- Department of Periodontology and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Yunmao Liao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wenchuan Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Zhichao Hao
- Department of Prosthodontics, Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Yushu Wang
- Department of Biomedical Engineering, Tufts University, Medford, MA, United States
| | - Zhimin Zhu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wei Teng
- Department of Prosthodontics, Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
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143
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Ullah I, Siddiqui MA, Liu H, Kolawole SK, Zhang J, Zhang S, Ren L, Yang K. Mechanical, Biological, and Antibacterial Characteristics of Plasma-Sprayed (Sr,Zn) Substituted Hydroxyapatite Coating. ACS Biomater Sci Eng 2020; 6:1355-1366. [PMID: 33455366 DOI: 10.1021/acsbiomaterials.9b01396] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Implant-related infections are a major concern in total joint prostheses, occurring up to 3% in operations. In this work, 5% Zn2+ was added in HA to offset bacterial activity and 5% Sr2+ was also incorporated as a binary dopant to reduce the cytotoxic effect of Zn2+. The nanosized HA powder was synthesized by the hydrothermal method and then heat-treated at 600 °C for 4 h. The heat-treated powder was plasma-sprayed on a titanium alloy Ti-6Al-4V substrate. The addition of the dopant did not significantly influence the physical and mechanical properties of the coating. However, the cytocompatibility, antimicrobial, and contact-angle properties statistically enhanced. Moreover, the (Sr,Zn)-HA coating was post-heat treated at 500 and 600 °C for 3 h. X-ray diffraction confirmed that after heat treatment phase purity and crystallinity increased and residual stress decreased. Mechanical stability was evaluated by adhesive bond strength, and the results showed that after heat-treatment bonding strength increased from 26.81 ± 2.93 to 29.84 ± 3.62 and 34.66 ± 2.57 MPa, at 500 and 600 °C, respectively. Similar to the mechanical property, antibacterial activities and biological functions are also significantly improved. More interestingly, it was also observed that the Zn2+ ions released from the coating depend on Ca2+, P, and Sr2+ ions while Ca2+, P, and Sr2+ ions relied on heat treatment temperatures. However, (Sr,Zn)-HA coating at 600 °C demonstrates cytotoxic effects on MC3T3-E1 cells, characterized by poor cellular morphology on the coating surface and ultimately, cell death. The doping of Sr2+ with Zn2+, therefore, can offset the cytotoxic effects and enhanced biological performance. All of the outcomes of this study signify that (Sr,Zn)-HA coating heat-treated at 500 °C showed not only excellent mechanical and biological performance but also enhanced the antibacterial properties.
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Affiliation(s)
- Ihsan Ullah
- Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, China 230026
| | - Muhammad Ali Siddiqui
- Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, China 230026
| | - Hui Liu
- Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, China 230026
| | - Sharafadeen Kunle Kolawole
- Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, China 230026
| | - Ji Zhang
- Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
| | - Shuyuan Zhang
- Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
| | - Ling Ren
- Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
| | - Ke Yang
- Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
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144
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Bohner B, Bánsági T, Tóth Á, Horváth D, Taylor AF. Periodic Nucleation of Calcium Phosphate in a Stirred Biocatalytic Reaction. Angew Chem Int Ed Engl 2020; 59:2823-2828. [PMID: 31833161 PMCID: PMC7027757 DOI: 10.1002/anie.201911213] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Indexed: 12/24/2022]
Abstract
Highly ordered superstructures composed of inorganic nanoparticles appear in natural and synthetic systems, however the mechanisms of non-equilibrium self-organization that may be involved are still poorly understood. Herein, we performed a kinetic investigation of the precipitation of calcium phosphate using a process widely found in microorganisms: the hydrolysis of urea by enzyme urease. With high initial ratio of calcium ion to phosphate, periodic precipitation was obtained accompanied by pH oscillations in a well-stirred, closed reactor. We propose that an internal pH-regulated change in the concentration of phosphate ion is the driving force for periodicity. A simple model involving the biocatalytic reaction network coupled with burst nucleation of nanoparticles above a critical supersaturation reproduced key features of the experiments. These findings may provide insight to the self-organization of nanoparticles in biomineralization and improve design strategies of biomaterials for medical applications.
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Affiliation(s)
- Bíborka Bohner
- Department of Physical Chemistry and Materials ScienceUniversity of SzegedRerrich Béla tér 1.6720SzegedHungary
| | - Tamás Bánsági
- School of ChemistryUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Ágota Tóth
- Department of Physical Chemistry and Materials ScienceUniversity of SzegedRerrich Béla tér 1.6720SzegedHungary
| | - Dezső Horváth
- Department of Applied and Environmental ChemistryUniversity of SzegedRerrich Béla tér 1.6720SzegedHungary
| | - Annette F. Taylor
- Department of Chemical and Biological EngineeringUniversity of SheffieldMappin StreetSheffieldS1 3JDUK
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145
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Bohner B, Bánsági T, Tóth Á, Horváth D, Taylor AF. Periodic Nucleation of Calcium Phosphate in a Stirred Biocatalytic Reaction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201911213] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Bíborka Bohner
- Department of Physical Chemistry and Materials ScienceUniversity of Szeged Rerrich Béla tér 1. 6720 Szeged Hungary
| | - Tamás Bánsági
- School of ChemistryUniversity of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Ágota Tóth
- Department of Physical Chemistry and Materials ScienceUniversity of Szeged Rerrich Béla tér 1. 6720 Szeged Hungary
| | - Dezső Horváth
- Department of Applied and Environmental ChemistryUniversity of Szeged Rerrich Béla tér 1. 6720 Szeged Hungary
| | - Annette F. Taylor
- Department of Chemical and Biological EngineeringUniversity of Sheffield Mappin Street Sheffield S1 3JD UK
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146
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Mayen L, Jensen ND, Laurencin D, Marsan O, Bonhomme C, Gervais C, Smith ME, Coelho C, Laurent G, Trebosc J, Gan Z, Chen K, Rey C, Combes C, Soulié J. A soft-chemistry approach to the synthesis of amorphous calcium ortho/pyrophosphate biomaterials of tunable composition. Acta Biomater 2020; 103:333-345. [PMID: 31881314 DOI: 10.1016/j.actbio.2019.12.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 12/15/2019] [Accepted: 12/19/2019] [Indexed: 12/27/2022]
Abstract
The development of amorphous phosphate-based materials is of major interest in the field of biomaterials science, and especially for bone substitution applications. In this context, we herein report the synthesis of gel-derived hydrated amorphous calcium/sodium ortho/pyrophosphate materials at ambient temperature and in water. For the first time, such materials have been obtained in a large range of tunable orthophosphate/pyrophosphate molar ratios. Multi-scale characterization was carried out thanks to various techniques, including advanced multinuclear solid state NMR. It allowed the quantification of each ionic/molecular species leading to a general formula for these materials: [(Ca2+y Na+z H+3+x-2y-z)(PO43-)1-x(P2O74-)x](H2O)u. Beyond this formula, the analyses suggest that these amorphous solids are formed by the aggregation of colloids and that surface water and sodium could play a role in the cohesion of the whole material. Although the full comprehension of mechanisms of formation and structure is still to be investigated in detail, the straightforward synthesis of these new amorphous materials opens up many perspectives in the field of materials for bone substitution and regeneration. STATEMENT OF SIGNIFICANCE: The metastability of amorphous phosphate-based materials with various chain length often improves their (bio)chemical reactivity. However, the control of the ratio of the different phosphate entities has not been yet described especially for small ions (pyrophosphate/orthophosphate) and using soft chemistry, whereas it opens the way for the tuning of enzyme- and/or pH-driven degradation and biological properties. Our study focuses on elaboration of amorphous gel-derived hydrated calcium/sodium ortho/pyrophosphate solids at 70 °C with a large range of orthophosphate/pyrophosphate ratios. Multi-scale characterization was carried out using various techniques such as advanced multinuclear SSNMR (31P, 23Na, 1H, 43Ca). Analyses suggest that these solids are formed by colloids aggregation and that the location of mobile water and sodium could play a role in the material cohesion.
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Affiliation(s)
- Laëtitia Mayen
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET, Toulouse, France
| | - Nicholai D Jensen
- ICGM, CNRS-UM-ENSCM, Université de Montpellier, Montpellier, France; Sorbonne Université, CNRS, LCMCP, Paris, France
| | | | - Olivier Marsan
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET, Toulouse, France
| | | | | | - Mark E Smith
- Department of Chemistry, Lancaster University, Lancaster, UK
| | | | | | - Julien Trebosc
- Université de Lille, UMR 8181, UCCS: Unit of Catalysis and Chemistry of Solids, Lille, France
| | - Zhehong Gan
- National High Magnetic Field Laboratory, Tallahassee, FL, USA
| | - Kuizhi Chen
- National High Magnetic Field Laboratory, Tallahassee, FL, USA
| | - Christian Rey
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET, Toulouse, France
| | - Christèle Combes
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET, Toulouse, France
| | - Jérémy Soulié
- CIRIMAT, Université de Toulouse, CNRS, INPT-ENSIACET, Toulouse, France.
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147
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Ramírez-Rodríguez GB, Dal Sasso G, Carmona FJ, Miguel-Rojas C, Pérez-de-Luque A, Masciocchi N, Guagliardi A, Delgado-López JM. Engineering Biomimetic Calcium Phosphate Nanoparticles: A Green Synthesis of Slow-Release Multinutrient (NPK) Nanofertilizers. ACS APPLIED BIO MATERIALS 2020; 3:1344-1353. [DOI: 10.1021/acsabm.9b00937] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Gloria B. Ramírez-Rodríguez
- Department of Inorganic Chemistry, University of Granada, Faculty of Science, Av. Fuente Nueva, s/n, 18071 Granada, Spain
- Department of Science and High Technology and To.Sca.Lab., University of Insubria, Via Valleggio 11, I-22100 Como, Italy
| | - Gregorio Dal Sasso
- Institute of Crystallography and To.Sca.Lab. Consiglio Nazionale delle Ricerche (IC−CNR), Via Valleggio 11, I-22100 Como, Italy
| | - Francisco J. Carmona
- Department of Science and High Technology and To.Sca.Lab., University of Insubria, Via Valleggio 11, I-22100 Como, Italy
| | - Cristina Miguel-Rojas
- Department of Science and High Technology and To.Sca.Lab., University of Insubria, Via Valleggio 11, I-22100 Como, Italy
- IFAPA Alameda del Obispo, Area of Genomic and Biotechnology, Avenida Menéndez Pidal, S/N, 14004 Córdoba, Spain
| | - Alejandro Pérez-de-Luque
- IFAPA Alameda del Obispo, Area of Genomic and Biotechnology, Avenida Menéndez Pidal, S/N, 14004 Córdoba, Spain
| | - Norberto Masciocchi
- Department of Science and High Technology and To.Sca.Lab., University of Insubria, Via Valleggio 11, I-22100 Como, Italy
| | - Antonietta Guagliardi
- Institute of Crystallography and To.Sca.Lab. Consiglio Nazionale delle Ricerche (IC−CNR), Via Valleggio 11, I-22100 Como, Italy
| | - José M. Delgado-López
- Department of Inorganic Chemistry, University of Granada, Faculty of Science, Av. Fuente Nueva, s/n, 18071 Granada, Spain
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148
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Yun F, Swain MV, Chen H, Cairney J, Qu J, Sha G, Liu H, Ringer SP, Han Y, Liu L, Zhang X, Zheng R. Nanoscale pathways for human tooth decay - Central planar defect, organic-rich precipitate and high-angle grain boundary. Biomaterials 2019; 235:119748. [PMID: 31978841 DOI: 10.1016/j.biomaterials.2019.119748] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 12/02/2019] [Accepted: 12/25/2019] [Indexed: 02/01/2023]
Abstract
Understanding the pathways and mechanisms of human tooth decay is central to the development of both prophylaxes and treatments, but only limited information is presently available about the initiation of caries at the nanoscale. By combining atom probe tomography and high-resolution electron microscopy, we have found three distinct initial sites for human dental enamel dissolution: a) along the central dark line (CDL) within carbonated apatite nanocrystals, b) at organic-rich precipitates and c) along high-angle grain boundaries. 3D maps of the atoms within hydroxyapatite nanocrystallites in sound and naturally-decayed human dental enamel reveal a higher concentration of Mg and Na in the CDL. The CDL is therefore thought to provide a pathway for the exchange of ions during demineralization and remineralization. Mg and Na enrichment of the CDL also suggests that it is associated with the ribbon-like organic-rich precursor in amelogenesis. Organic-rich precipitates and high-angle grain boundaries were also shown to be more vulnerable to corrosion while low-angle grain boundaries remained intact. This is attributed to the lower crystallinity in these regions.
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Affiliation(s)
- Fan Yun
- School of Physics, The University of Sydney, NSW, 2006, Australia; Australian Center for Microscopy and Microanalysis, The University of Sydney, NSW, 2006, Australia; The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Michael V Swain
- School of Aerospace, Mechanical and Mechatronic Engineering, the University of Sydney, Sydney, NSW, 2006, Australia
| | - Hansheng Chen
- School of Physics, The University of Sydney, NSW, 2006, Australia; Australian Center for Microscopy and Microanalysis, The University of Sydney, NSW, 2006, Australia; The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Julie Cairney
- Australian Center for Microscopy and Microanalysis, The University of Sydney, NSW, 2006, Australia; The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia; School of Aerospace, Mechanical and Mechatronic Engineering, the University of Sydney, Sydney, NSW, 2006, Australia
| | - Jiangtao Qu
- School of Physics, The University of Sydney, NSW, 2006, Australia; Australian Center for Microscopy and Microanalysis, The University of Sydney, NSW, 2006, Australia; The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Gang Sha
- School of Materials Science and Engineering, Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China
| | - Hongwei Liu
- Australian Center for Microscopy and Microanalysis, The University of Sydney, NSW, 2006, Australia
| | - Simon P Ringer
- The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia; School of Aerospace, Mechanical and Mechatronic Engineering, the University of Sydney, Sydney, NSW, 2006, Australia
| | - Yu Han
- Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Lingmei Liu
- Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Xixiang Zhang
- Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Rongkun Zheng
- School of Physics, The University of Sydney, NSW, 2006, Australia; Australian Center for Microscopy and Microanalysis, The University of Sydney, NSW, 2006, Australia; The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia.
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149
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Waiyawat J, Kongsema M, Sinthuvanich C, Chienthavorn O, Teanchai C, Akkarachaneeyakorn K. Fabrication of calcium phosphate composite polymer/SLS-stabilized emulsion-based bioactive gels and their application for dentine tubule occlusion. J Oral Biosci 2019; 62:64-71. [PMID: 31857200 DOI: 10.1016/j.job.2019.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 11/09/2019] [Accepted: 11/14/2019] [Indexed: 11/20/2022]
Abstract
OBJECTIVES Calcium phosphate/SLS/P123 composite bioactive gels were prepared to achieve dentine tubule occlusion. METHODS Gels containing calcium phosphate particles were prepared in a water-in-oil microemulsion system with a mixture of triblock copolymer pluronic (P123) as a co-surfactant and sodium lauryl sulfate (SLS) as a surfactant in cyclohexane. Subsequently, calcium chloride dihydrate and sodium hydrogen phosphate aqueous solutions were added in a water phase. Finally, slow evaporation of the oil phase at room temperature was performed to produce a hybrid gel. The obtained gels were investigated for their toxicity by the sulforhodamine B (SRB) assay and applied on human dentine specimens to examine their ability to occlude dentine tubules. RESULTS The size and morphology of the calcium phosphate particles embedded in the gel depended on the concentration of P123 and SLS, which were used as a template for mineral precipitation. The prepared calcium phosphate particles (200-500 nm in diameter) with the maximum polymer and surfactant content exhibited spherical shapes. Further, on reducing their content twice and tenfold yields micro-particles with flower-like shapes. These bioactive gels were able to occlude into dentine tubules after 3 days of application with a plugging rate of 79.22% when using the smallest particles. In addition, calcium phosphate nanorods were transformed into dentine tubules with a maximum depth of 6 μm on increasing the amount of gel. CONCLUSIONS The bioactive gels were effectively used as bioactive fillers to occlude exposed human dentine tubules.
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Affiliation(s)
- Jutharat Waiyawat
- Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Mesayamas Kongsema
- Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
| | - Chomdao Sinthuvanich
- Department of Biochemistry, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
| | - Orapin Chienthavorn
- Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Chayada Teanchai
- Faculty of Dentistry, Mahidol University, Bangkok, 10400, Thailand
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150
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Sun R, Åhlén M, Tai CW, Bajnóczi ÉG, de Kleijne F, Ferraz N, Persson I, Strømme M, Cheung O. Highly Porous Amorphous Calcium Phosphate for Drug Delivery and Bio-Medical Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 10:E20. [PMID: 31861727 PMCID: PMC7022897 DOI: 10.3390/nano10010020] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/13/2019] [Accepted: 12/16/2019] [Indexed: 12/21/2022]
Abstract
Amorphous calcium phosphate (ACP) has shown significant effects on the biomineralization and promising applications in bio-medicine. However, the limited stability and porosity of ACP material restrict its practical applications. A storage stable highly porous ACP with Brunauer-Emmett-Teller surface area of over 400 m2/g was synthesized by introducing phosphoric acid to a methanol suspension containing amorphous calcium carbonate nanoparticles. Electron microscopy revealed that the porous ACP was constructed with aggregated ACP nanoparticles with dimensions of several nanometers. Large angle X-ray scattering revealed a short-range atomic order of <20 Å in the ACP nanoparticles. The synthesized ACP demonstrated long-term stability and did not crystallize even after storage for over 14 months in air. The stability of the ACP in water and an α-MEM cell culture medium were also examined. The stability of ACP could be tuned by adjusting its chemical composition. The ACP synthesized in this work was cytocompatible and acted as drug carriers for the bisphosphonate drug alendronate (AL) in vitro. AL-loaded ACP released ~25% of the loaded AL in the first 22 days. These properties make ACP a promising candidate material for potential application in biomedical fields such as drug delivery and bone healing.
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Affiliation(s)
- Rui Sun
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
| | - Michelle Åhlén
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
| | - Cheuk-Wai Tai
- Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden;
| | - Éva G. Bajnóczi
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden; (É.G.B.); (I.P.)
| | - Fenne de Kleijne
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
| | - Natalia Ferraz
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
| | - Ingmar Persson
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden; (É.G.B.); (I.P.)
| | - Maria Strømme
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
| | - Ocean Cheung
- Division of Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, SE-751 21 Uppsala, Sweden; (R.S.); (M.Å.); (F.d.K.); (N.F.)
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