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Pyo SW, Paik JW, Lee DN, Seo YW, Park JY, Kim S, Choi SH. Comparative Analysis of Bone Regeneration According to Particle Type and Barrier Membrane for Octacalcium Phosphate Grafted into Rabbit Calvarial Defects. Bioengineering (Basel) 2024; 11:215. [PMID: 38534489 DOI: 10.3390/bioengineering11030215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/13/2024] [Accepted: 02/21/2024] [Indexed: 03/28/2024] Open
Abstract
This animal study was aimed to evaluate the efficacy of new bone formation and volume maintenance according to the particle type and the collagen membrane function for grafted octacalcium phosphate (OCP) in rabbit calvarial defects. The synthetic bone substitutes were prepared in powder form with 90% OCP and granular form with 76% OCP, respectively. The calvarial defects were divided into four groups according to the particle type and the membrane application. All specimens were acquired 2 weeks (n = 5) and 8 weeks (n = 5) after surgery. According to the micro-CT results, the new bone volume increased at 2 weeks in the 76% OCP groups compared to the 90% OCP groups, and the bone volume ratio was significantly lower in the 90% OCP group after 2 weeks. The histomorphometric analysis results indicated that the new bone area and its ratio in all experimental groups were increased at 8 weeks except for the group with 90% OCP without a membrane. Furthermore, the residual bone graft area and its ratio in the 90% OCP groups were decreased at 8 weeks. In conclusion, all types of OCP could be applied as biocompatible bone graft materials regardless of its density and membrane application. Neither the OCP concentration nor the membrane application had a significant effect on new bone formation in the defect area, but the higher the OCP concentration, the less graft volume maintenance was needed.
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Affiliation(s)
- Se-Wook Pyo
- Department of Prosthodontics, Gangnam Severance Dental Hospital, Yonsei University College of Dentistry, Seoul 06273, Republic of Korea
| | - Jeong-Won Paik
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
| | - Da-Na Lee
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
| | - Young-Wook Seo
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
| | - Jin-Young Park
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
| | - Sunjai Kim
- Department of Prosthodontics, Gangnam Severance Dental Hospital, Yonsei University College of Dentistry, Seoul 06273, Republic of Korea
| | - Seong-Ho Choi
- Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
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Demir Ö, Pylostomou A, Loca D. Octacalcium phosphate phase forming cements as an injectable bone substitute materials: Preparation and in vitro structural study. BIOMATERIALS ADVANCES 2024; 157:213731. [PMID: 38103399 DOI: 10.1016/j.bioadv.2023.213731] [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: 08/08/2023] [Revised: 12/05/2023] [Accepted: 12/07/2023] [Indexed: 12/19/2023]
Abstract
In the realm of regenerating damaged or degenerated bones through minimally invasive techniques, injectable materials have emerged as exceptionally promising. Among these, calcium phosphate bone cements (CPCs) have garnered significant interest due to their remarkable bioactivity, setting it apart from non-degradable alternatives such as polymethyl methacrylate cements. α-Tricalcium phosphate (α-TCP) is a widely used solid phase component in CPCs. It can transform into calcium-deficient hydroxyapatite (CDHAp) when it comes in contact with water. In this study, we aimed to create an injectable, self-setting bone cement using low-temperature synthesized α-TCP powder as a single precursor of the powder phase. We found that changes in the pH of the liquid phase (pH 6.0, pH 6.2, pH 7.0 and pH 7.4) significantly altered the cement's setting, handling, and mechanical properties. The formation of the octacalcium phosphate (OCP) phase was identified in our study, which positively affects the osteoblastic cell response. Hardened OCP-forming bone cements prepared using a liquid phase with pH 7.0 and 7.4 showed better osteogenic cell attachment and proliferation than those prepared with pH 6.0 and 6.2. Our study suggests that changes in the pH of the liquid phase can significantly affect the properties of α-TCP-based bone cement, and the presence of the OCP phase is crucial for optimal cement performance.
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Affiliation(s)
- Öznur Demir
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka St 3, Riga LV-1007, Latvia; Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, Riga, Latvia
| | - Athanasia Pylostomou
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka St 3, Riga LV-1007, Latvia; Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, Riga, Latvia
| | - Dagnija Loca
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka St 3, Riga LV-1007, Latvia; Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, Riga, Latvia.
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Nascimben M, Kovrlija I, Locs J, Loca D, Rimondini L. Fusion and classification algorithm of octacalcium phosphate production based on XRD and FTIR data. Sci Rep 2024; 14:1489. [PMID: 38233557 PMCID: PMC10794451 DOI: 10.1038/s41598-024-51795-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 01/08/2024] [Indexed: 01/19/2024] Open
Abstract
The present manuscript tested an automated analysis sequence to provide a decision support system to track the OCP synthesis from [Formula: see text]-TCP over time. Initially, the XRD and FTIR signals from a hundredfold scaled-up hydrolysis of OCP from [Formula: see text]-TCP were fused and modeled by the curve fitting based on the significantly established maxima from the literature and nine features extracted from the fitted shapes. Afterward, the analysis sequence enclosed the machine learning techniques for feature ranking, spatial filtering, and dimensionality reduction to support the automatic recognition of the synthesis stages. The proposed analysis pipeline for OCP identification might be the foundation for a decision support system explicitly targeting OCP synthesis. Future projects will exploit the suggested methodology for pinpointing the OCP production over time (including the intermediary phases present in the OCP formation) and for evaluating whether biological variables might be merged with biomaterial properties to build a unified model of tissue response to the implant.
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Affiliation(s)
- Mauro Nascimben
- Center for Translational Research on Autoimmune and Allergic Diseases-CAAD, Department of Health Sciences, Università del Piemonte Orientale UPO, 28100, Novara, Italy.
- Enginsoft SpA, 35129, Padua, Italy.
| | - Ilijana Kovrlija
- Institute of Biomaterials and Bioengineering, Faculty of Natural Sciences and Technology, Riga Technical University, Riga, Pulka 3, LV-1007, Latvia
| | - Janis Locs
- Institute of Biomaterials and Bioengineering, Faculty of Natural Sciences and Technology, Riga Technical University, Riga, Pulka 3, LV-1007, Latvia
- Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, Riga, Latvia
| | - Dagnija Loca
- Institute of Biomaterials and Bioengineering, Faculty of Natural Sciences and Technology, Riga Technical University, Riga, Pulka 3, LV-1007, Latvia
- Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, Riga, Latvia
| | - Lia Rimondini
- Center for Translational Research on Autoimmune and Allergic Diseases-CAAD, Department of Health Sciences, Università del Piemonte Orientale UPO, 28100, Novara, Italy
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Kuvshinova EA, Petrakova NV, Nikitina YO, Sviridova IK, Akhmedova SA, Kirsanova VA, Karalkin PA, Komlev VS, Sergeeva NS, Kaprin AD. Functionalization of Octacalcium Phosphate Bone Graft with Cisplatin and Zoledronic Acid: Physicochemical and Bioactive Properties. Int J Mol Sci 2023; 24:11633. [PMID: 37511391 PMCID: PMC10380611 DOI: 10.3390/ijms241411633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 07/02/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
Bones are the fourth most frequent site of metastasis from malignant tumors, including breast cancer, prostate cancer, melanoma, etc. The bioavailability of bone tissue for chemotherapy drugs is extremely low. This requires a search for new approaches of targeted drug delivery to the tumor growth zone after surgery treatment. The aim of this work was to develop a method for octacalcium phosphate (OCP) bone graft functionalization with the cytostatic drug cisplatin to provide the local release of its therapeutic concentrations into the bone defect. OCP porous ceramic granules (OCP ceramics) were used as a platform for functionalization, and bisphosphonate zoledronic acid was used to mediate the interaction between cisplatin and OCP and enhance their binding strength. The obtained OCP materials were studied using scanning electron and light microscopy, high-performance liquid chromatography, atomic emission spectroscopy, and real-time PCR. In vitro and in vivo studies were performed on normal and tumor cell lines and small laboratory animals. The bioactivity of initial OCP ceramics was explored and the efficiency of OCP functionalization with cisplatin, zoledronic acid, and their combination was evaluated. The kinetics of drug release and changes in ceramics properties after functionalization were studied. It was established that zoledronic acid changed the physicochemical and bioactive properties of OCP ceramics and prolonged cisplatin release from the ceramics. In vitro and in vivo experiments confirmed the biocompatibility, osteoconductivity, and osteoinductivity, as well as cytostatic and antitumor properties of the obtained materials. The use of OCP ceramics functionalized with a cytostatic via the described method seems to be promising in clinics when primary or metastatic tumors of the bone tissue are removed.
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Affiliation(s)
- Ekaterina A Kuvshinova
- P.A. Herzen Moscow Research Oncology Institute, Branch of FSBI National Medical Research Radiological Centre, Ministry of Health of the Russian Federation, 2nd Botkinsky Pass. 3, 125284 Moscow, Russia
| | - Nataliya V Petrakova
- A.A. Baikov Institute of Metallurgy and Materials Science RAS, Leninsky Avenue 49, 119334 Moscow, Russia
| | - Yulia O Nikitina
- A.A. Baikov Institute of Metallurgy and Materials Science RAS, Leninsky Avenue 49, 119334 Moscow, Russia
| | - Irina K Sviridova
- P.A. Herzen Moscow Research Oncology Institute, Branch of FSBI National Medical Research Radiological Centre, Ministry of Health of the Russian Federation, 2nd Botkinsky Pass. 3, 125284 Moscow, Russia
| | - Suraja A Akhmedova
- P.A. Herzen Moscow Research Oncology Institute, Branch of FSBI National Medical Research Radiological Centre, Ministry of Health of the Russian Federation, 2nd Botkinsky Pass. 3, 125284 Moscow, Russia
| | - Valentina A Kirsanova
- P.A. Herzen Moscow Research Oncology Institute, Branch of FSBI National Medical Research Radiological Centre, Ministry of Health of the Russian Federation, 2nd Botkinsky Pass. 3, 125284 Moscow, Russia
| | - Pavel A Karalkin
- P.A. Herzen Moscow Research Oncology Institute, Branch of FSBI National Medical Research Radiological Centre, Ministry of Health of the Russian Federation, 2nd Botkinsky Pass. 3, 125284 Moscow, Russia
- L.L. Levshin Institute of Cluster Oncology, I.M. Sechenov First Moscow State Medical University, Trubetskaya 8-2, 119991 Moscow, Russia
| | - Vladimir S Komlev
- A.A. Baikov Institute of Metallurgy and Materials Science RAS, Leninsky Avenue 49, 119334 Moscow, Russia
| | - Natalia S Sergeeva
- P.A. Herzen Moscow Research Oncology Institute, Branch of FSBI National Medical Research Radiological Centre, Ministry of Health of the Russian Federation, 2nd Botkinsky Pass. 3, 125284 Moscow, Russia
| | - Andrey D Kaprin
- FSBI National Medical Research Radiological Centre, Ministry of Health of the Russian Federation, 2nd Botkinsky Pass. 3, 125284 Moscow, Russia
- Department of Urology and Operative Nephrology, Peoples' Friendship University of Russia, Miklukho-Maklay Str., 6, 117198 Moscow, Russia
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Exploring the Formation Kinetics of Octacalcium Phosphate from Alpha-Tricalcium Phosphate: Synthesis Scale-Up, Determination of Transient Phases, Their Morphology and Biocompatibility. Biomolecules 2023; 13:biom13030462. [PMID: 36979398 PMCID: PMC10046208 DOI: 10.3390/biom13030462] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/17/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Even with decades of research studies behind octacalcium phosphate (OCP), determination of OCP phase formation has proved to be a cumbersome challenge. Even though obtaining a large quantity of OCP is important for potential clinical uses, it still remains a hindrance to obtain high yields of pure OCP. Taking that into consideration, the purpose of this study was to scale-up OCP synthesis for the first time and to use a multi-technique approach to follow the phase transformation pathway at multiple time points. In the present study, OCP has been synthesized from α-tricalcium phosphate (α-TCP), and subsequently scaled-up tenfold and hundredfold (100 mg → 10 g). The hydrolysis mechanism has been followed and described by using XRD and FTIR spectroscopy, as well as Raman and SEM. Gradual transformation into the OCP phase transpired through dicalcium phosphate dihydrate (brushite, DCPD, up to ~36%) as an intermediary phase. Furthermore, the obtained transitional phases and final OCP phases (across all scale-up levels) were tested with human bone marrow-derived mesenchymal stem cells (hBMSCs), in order to see how different phase mixtures affect the cell viability, and also to corroborate the safety of the scaled-up product. Twelve out of seventeen specimens showed satisfactory percentages of cell viability and confirmed the prospective use of scaled-up OCP in further in vitro studies. The present study, therefore, provides the first scale-up process of OCP synthesis, an in depth understanding of the formation pathway, and investigation of the parameters able to contribute in the OCP phase formation.
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Suzuki O, Hamai R, Sakai S. The material design of octacalcium phosphate bone substitute: increased dissolution and osteogenecity. Acta Biomater 2023; 158:1-11. [PMID: 36581004 DOI: 10.1016/j.actbio.2022.12.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/16/2022] [Accepted: 12/21/2022] [Indexed: 12/29/2022]
Abstract
Octacalcium phosphate (OCP) has been advocated as a precursor of bone apatite crystals. Recent studies have shown that synthetic OCP exhibits highly osteoconductive properties as a bone substitute material that stems from its ability to activate bone tissue-related cells, such as osteoblasts, osteocytes, and osteoclasts. Accumulated experimental evidence supports the proposition that the OCP-apatite phase conversion under physiological conditions increases the stimulatory capacity of OCP. The conversion of OCP progresses by hydrolysis toward Ca-deficient hydroxyapatite with Ca2+ ion incorporation and inorganic phosphate ion release with concomitant increases in the solid Ca/P molar ratio, specific surface area, and serum protein adsorption affinity. The ionic dissolution rate during the hydrolysis reaction was controlled by introducing a high-density edge dislocation within the OCP lattice by preparing it through co-precipitation with gelatin. The enhanced dissolution intensifies the material biodegradation rate and degree of osteogenecity of OCP. Controlling the biodegradation rate relative to the dissolution acceleration may be vital for controlling the osteogenecity of OCP materials. This study investigates the effects of the ionic dissolution of OCP, focusing on the structural defects in OCP, as the enhanced metastability of the OCP phase modulates biodegradability followed by new bone formation. STATEMENT OF SIGNIFICANCE: Octacalcium phosphate (OCP) is recognized as a highly osteoconductive material that is biodegradable by osteoclastic resorption, followed by new bone formation by osteoblasts. However, if the degradation rate of OCP is increased by maintaining the original osteoconductivity or acquiring a bioactivity better than its current properties, then early replacement with new bone can be expected. Although cell introduction or growth factor addition by scaffold materials is the standard method for tissue engineering, material activity can be augmented by introducing dislocations into the lattice of the OCP. This review article summarizes the effects of introducing structural defects on activating OCP, which was obtained by co-precipitation with gelatin, as a bone substitute material and the mechanism of improved bone replacement performance.
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Affiliation(s)
- Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan.
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Susumu Sakai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
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Polymer/Ceramic Nanocomposite Fibers in Bone Tissue Engineering. ADVANCES IN POLYMER SCIENCE 2023. [DOI: 10.1007/12_2023_145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Xiao L, Shiwaku Y, Hamai R, Baba K, Tsuchiya K, Imazato S, Sasaki K, Suzuki O. Osteogenic capacity of octacalcium phosphate involving macrophage polarization. J Biomed Mater Res A 2022; 111:1006-1020. [PMID: 36573692 DOI: 10.1002/jbm.a.37484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 11/16/2022] [Accepted: 12/08/2022] [Indexed: 12/28/2022]
Abstract
Previous research has found that octacalcium phosphate (OCP) increases macrophage accumulation and alters the initial inflammatory response. However, the role of the immune response induced by OCP in osteogenesis remains unknown. This study investigated the behavior of macrophages and bone regeneration capacity during the early inflammatory stage of OCP-mediated osteogenesis. To assess the change in macrophage polarization and osteogenic capacity, we used a standardized rat defect model filled with OCP or calcium-deficient hydroxyapatite (CDHA)-a material obtained through the hydrolysis of the original OCP. OCP or CDHA granules were incubated with RAW264 cells for 5 days to investigate the effect of physicochemical characteristics on macrophage cytokine/chemokine expression in vitro. Our in vivo results show that due to the OCP implantation, macrophages in the rat tibial defect area tend to polarize to the M2 phenotype (anti-inflammatory) and inhibit the formation of the M1 phenotype (pro-inflammatory). In comparison to CDHA, OCP exhibited superior bone regeneration potential due to its rapid promotion of cortical bone healing and stimulation of macrophage-related growth factors. Furthermore, our in vitro results have shown that OCP regulates the expression of macrophage chemokines over time. Compared to incubation with CDHA, incubation with OCP caused changes in the ionic microenvironment. These findings suggest that the OCP-mediated macrophage polarization and secretion profile not only regulate immune function but also positively affect osteogenesis.
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Affiliation(s)
- Linghao Xiao
- Division of Craniofacial Function Engineering Tohoku University Graduate School of Dentistry Sendai Japan
- Division of Advanced Prosthetic Dentistry Tohoku University Graduate School of Dentistry Sendai Japan
- Department of Advanced Functional Materials Science Osaka University Graduate School of Dentistry Suita Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering Tohoku University Graduate School of Dentistry Sendai Japan
| | - Ryo Hamai
- Division of Craniofacial Function Engineering Tohoku University Graduate School of Dentistry Sendai Japan
| | - Kazuyoshi Baba
- Department of Orthopedic Surgery Tohoku University Graduate School of Medicine Sendai Japan
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering Tohoku University Graduate School of Dentistry Sendai Japan
| | - Satoshi Imazato
- Department of Biomaterials Science Osaka University Graduate School of Dentistry Suita Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry Tohoku University Graduate School of Dentistry Sendai Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering Tohoku University Graduate School of Dentistry Sendai Japan
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Calcium Phosphate-Based Biomaterials for Bone Repair. J Funct Biomater 2022; 13:jfb13040187. [PMID: 36278657 PMCID: PMC9589993 DOI: 10.3390/jfb13040187] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/03/2022] [Accepted: 10/10/2022] [Indexed: 11/07/2022] Open
Abstract
Traumatic, tumoral, and infectious bone defects are common in clinics, and create a big burden on patient's families and society. Calcium phosphate (CaP)-based biomaterials have superior properties and have been widely used for bone defect repair, due to their similarities to the inorganic components of human bones. The biological performance of CaPs, as a determining factor for their applications, are dependent on their physicochemical properties. Hydroxyapatite (HAP) as the most thermally stable crystalline phase of CaP is mostly used in the form of ceramics or composites scaffolds with polymers. Nanostructured CaPs with large surface areas are suitable for drug/gene delivery systems. Additionally, CaP scaffolds with hierarchical nano-/microstructures have demonstrated excellent ability in promoting bone regeneration. This review focuses on the relationships and interactions between the physicochemical/biological properties of CaP biomaterials and their species, sizes, and morphologies in bone regeneration, including synthesis strategies, structure control, biological behavior, and the mechanisms of CaP in promoting osteogenesis. This review will be helpful for scientists and engineers to further understand CaP-based biomaterials (CaPs), and be useful in developing new high-performance biomaterials for bone repair.
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Octacalcium Phosphate/Gelatin Composite (OCP/Gel) Enhances Bone Repair in a Critical-sized Transcortical Femoral Defect Rat Model. Clin Orthop Relat Res 2022; 480:2043-2055. [PMID: 35638896 PMCID: PMC9473763 DOI: 10.1097/corr.0000000000002257] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 05/05/2022] [Indexed: 02/04/2023]
Abstract
BACKGROUND Bone grafting is widely used to treat large bone defects. A porous composite of a bioactive octacalcium phosphate material with gelatin sponge (OCP/Gel) has been shown to biodegrade promptly and be replaced with new bone both in animal models of a membranous bone defect and a long bone defect. However, it is unclear whether OCP/Gel can regenerate bone in more severe bone defects, such as a critical-size transcortical defect. QUESTIONS/PURPOSES Using an in vivo rat femur model of a standardized, transcortical, critical-size bone defect, we asked: Compared with a Gel control, does OCP/Gel result in more newly formed bone as determined by (1) micro-CT evaluation, (2) histologic and histomorphometric measures, and (3) osteocalcin staining and tartrate-resistant acid phosphatase staining? METHODS Thirty-four 12-week-old male Sprague-Dawley rats (weight 356 ± 25.6 g) were used. Gel and OCP/Gel composites were prepared in our laboratory. Porous cylinders 3 mm in diameter and 4 mm in height were manufactured from both materials. The OCP/Gel and Gel cylinders were implanted into a 3-mm-diameter transcortical critical-size bone defect model in the left rat femur. The OCP/Gel and Gel were randomly assigned, and the cylinders were implanted. The biological responses of the defect regions were evaluated radiologically and histologically. At 4 and 8 weeks after implantation, CT evaluation, histological examination of decalcified samples, and immunostaining were quantitatively performed to evaluate new bone formation and remaining bone graft substitutes and activity of osteoblasts and osteoclast-like cells (n = 24). Qualitative histological evaluation was performed on undecalcified samples at 3 weeks postimplantation (n = 10). CT and decalcified tissue analysis was not performed blinded, but an analysis of undecalcified specimens was performed under blinded conditions. RESULTS Radiologic analysis revealed that the OCP/Gel group showed radiopaque regions around the OCP granules and at the edge of the defect margin 4 weeks after implantation, suggesting that new bone formation occurred in two ways. In contrast, the rat femurs in the Gel group had a limited radiopaque zone at the edge of the defect region. The amount of new bone volume analyzed by micro-CT was higher in the OCP/Gel group than in the Gel group at 4 and 8 weeks after implantation (4 weeks after implantation: OCP/Gel versus Gel: 6.1 ± 1.6 mm 3 versus 3.4 ± 0.7 mm 3 , mean difference 2.7 [95% confidence interval (CI) 0.9 to 4.5]; p = 0.002; intraclass correlation coefficient [ICC] 0.72 [95% CI 0.29 to 0.91]; 8 weeks after implantation: OCP/Gel versus Gel: 3.9 ± 0.7 mm 3 versus 1.4 ± 1.1 mm 3 , mean difference 2.5 [95% CI 0.8 to 4.3]; p = 0.004; ICC 0.81 [95% CI 0.47 to 0.94]). Histologic evaluation also showed there was a higher percentage of new bone formation in the OCP/Gel group at 4 and 8 weeks after implantation (4 weeks after implantation: OCP/Gel versus Gel: 31.2% ± 5.3% versus 13.6% ± 4.0%, mean difference 17.6% [95% CI 14.2% to 29.2%]; p < 0.001; ICC 0.83 [95% CI 0.53 to 0.95]; 8 weeks after implantation: OCP/Gel versus Gel: 28.3% ± 6.2% versus 9.5% ± 1.9%, mean difference 18.8% [95% CI 11.3% to 26.3%]; p < 0.001; ICC 0.90 [95% CI 0.69 to 0.97]). Bridging of the defect area started earlier in the OCP/Gel group than in the Gel group at 4 weeks after implantation. Osteocalcin immunostaining showed that the number of mature osteoblasts was higher in the OCP/Gel group than in the Gel group at 4 weeks (OCP/Gel versus Gel: 42.1 ± 6.5/mm 2 versus 17.4 ± 5.4/mm 2 , mean difference 24.7 [95% CI 16.2 to 33.2]; p < 0.001; ICC 0.99 [95% CI 0.97 to 0.99]). At 4 weeks, the number of osteoclast-like cells was higher in the OCP/Gel composite group than in the Gel group (OCP/Gel versus Gel: 3.2 ± 0.6/mm 2 versus 0.9 ± 0.4/mm 2 , mean difference 2.3 [95% CI 1.3 to 3.5]; p < 0.001; ICC 0.79 [95% CI 0.35 to 0.94]). CONCLUSION OCP/Gel composites induced early bone remodeling and cortical bone repair in less time than did the Gel control in a rat critical-size, transcortical femoral defect, suggesting that OCP/Gel could be used as a bone replacement material to treat severe bone defects. CLINICAL RELEVANCE In a transcortical bone defect model of critical size in the rat femur, the OCP/Gel composite demonstrated successful bone regeneration. Several future studies are needed to evaluate the clinical application of this interesting bone graft substitute, including bone formation capacity in refractory fracture and spinal fusion models and the comparison of bone strength after repair with OCP/Gel composite to that of autologous bone.
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Okuyama K, Shiwaku Y, Hamai R, Mizoguchi T, Tsuchiya K, Takahashi T, Suzuki O. Differentiation of committed osteoblast progenitors by octacalcium phosphate compared to calcium-deficient hydroxyapatite in Lepr-cre/Tomato mouse tibia. Acta Biomater 2022; 142:332-344. [PMID: 35183778 DOI: 10.1016/j.actbio.2022.02.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/24/2022] [Accepted: 02/14/2022] [Indexed: 12/23/2022]
Abstract
This study aimed to investigate the accumulation and differentiation of mesenchymal stem cells (MSCs) around octacalcium phosphate (OCP) compared with those around calcium-deficient hydroxyapatite (CDHA), a material obtained through hydrolysis of the original OCP. Leptin receptor (Lepr)-expressing bone marrow-derived MSCs around the OCP and CDHA were pursued utilizing genetically modified Lepr-cre/Tomato mice. OCP and CDHA granules were implanted into the tibia defect of the mice for 10 weeks and subjected to histomorphometric and immunohistochemical analyses. The structural properties of OCP and CDHA after inoculation into mouse subcutaneous tissue (until 4 weeks) or culture mediums (14 days) were analyzed using physicochemical techniques. In vitro osteoblastic differentiation of primary MSCs was examined with the materials for 14 days. While Lepr-cre/Tomato positive cells (red) accumulated around both OCP and CDHA, Lepr and osteocalcin double-positive osteoblastic cells (yellow) were significantly more abundant around OCP than around CDHA in the early implantation period. OCP enhanced the osteoblastic differentiation of MSCs more than CDHA in vitro. Physicochemical and structual analyses provided evidence that OCP tended to convert to the apatitic phase in the tested physiological environments. The higher osteoconductivity of OCP originated from a capacity-enhancing osteoblastic differentiation of committed osteoblast progenitors in bone marrow accompanied by OCP hydrolysis. STATEMENT OF SIGNIFICANCE: MSCs play a key role in bone regeneration through osteoblastic differentiation. Calcium phosphates have been widely applied as bone substitute materials, and OCP has a better ability to promote osteoblast differentiation of MSCs than that of HA in vitro. However, it is not clear how MSCs accumulate in the bone marrow and differentiate into osteoblasts during bone regeneration in vivo. In this study, we focused on the leptin receptor, a marker of bone marrow-derived MSCs. Using genetically modified mice labeled with the red fluorescent protein Tomato, we observed the accumulation of MSCs around calcium phosphates implanted in tibia bone defects and their differentiation into osteoblasts.
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Affiliation(s)
- Kyosuke Okuyama
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan; Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | | | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan.
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Koyama S, Hamai R, Shiwaku Y, Kurobane T, Tsuchiya K, Takahashi T, Suzuki O. Angio-osteogenic capacity of octacalcium phosphate co-precipitated with copper gluconate in rat calvaria critical-sized defect. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2022; 23:120-139. [PMID: 35185389 PMCID: PMC8856029 DOI: 10.1080/14686996.2022.2035193] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
The objective of this study is to investigate the effects of octacalcium phosphate (OCP)-induced bone regeneration on angiogenesis regulated by the inclusion of copper ions in OCP in vitro and in vivo. Calcium (Ca)-deficient Cu-OCPs, containing 0.01 wt% Cu (low-Cu-OCP) and 0.12 wt% Cu (high-Cu-OCP), were synthesized with co7pper gluconate salt. The lattice parameters of Cu-OCPs tended to decrease slightly with Cu inclusion, as estimated by Rietveld analysis. Cu ions were released in OCP when the materials were incubated in the medium for human umbilical vein endothelial cells (HUVECs). The solubility of Cu-OCPs, estimated by the degree of supersaturation, was slightly higher than that of the original OCP. Cu-OCP tended to hydrolyze to an apatite structure while maintaining the crystal plate-like morphology when incubated with mesenchymal stem D1 cells in osteogenic media for 14 days. The specimens were characterized by selected area electron diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy. Low-Cu-OCP significantly enhanced the HUVEC capillary cross-linking density. D1 cell differentiation was inhibited with the inclusion of Cu, even at low concentrations. The composite of low-Cu-OCP with a gelatin sponge (low-Cu-OCP/Gel) significantly enhanced angiogenesis coupled with bone regeneration when implanted in a rat calvarial critical-sized defect for 4 weeks, compared with the corresponding amount of Cu-containing Gel (Cu/Gel) or OCP/Gel materials through angiography and tissue histomorphometry. These results support the proposition that angiogenesis stimulated by low-Cu-OCP is closely related with enhanced bone regeneration.
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Affiliation(s)
- Shinki Koyama
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Tsuyoshi Kurobane
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
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13
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Kovrlija I, Locs J, Loca D. Octacalcium phosphate: Innovative vehicle for the local biologically active substance delivery in bone regeneration. Acta Biomater 2021; 135:27-47. [PMID: 34450339 DOI: 10.1016/j.actbio.2021.08.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 08/09/2021] [Accepted: 08/14/2021] [Indexed: 12/29/2022]
Abstract
Disadvantages of conventional drug delivery systems (DDS), such as systemic circulation, interaction with physiochemical factors, reduced bioavailability, and insufficient drug concentration at bone defect site, have underlined the importance of developing efficacious local drug delivery systems. Octacalcium phosphate (OCP) is presumed to be the precursor of biologically formed apatite, owing to its similarity to hydroxyapatite (HAp) and readiness to convert to it. Specific crystal structure of OCP is constructed of compiled apatite layers and water layers, which make possible the incorporation of various ions in its structure, making it feasible to alter the overall effect OCP has in the system. Next to that intrinsic property, characteristics as high solubility, biodegradability and osteoconductivity have made it indispensable to tailor OCP as a carrier material. In this review, we present the main characteristics and progress done on utilizing OCP as an innovative vehicle and provide suggestions for possible research pathways and advantages for local drug delivery in bone tissue engineering. STATEMENT OF SIGNIFICANCE: Octacalcium phosphate (OCP), being a precursor to biologically formed apatite, has many assets when compared to other calcium phosphates. Owing to its highly pertinent structure, it is being used as a vehicle for biologically active substances or ions for bone regeneration. However, orchestrating drug delivery systems with OCP, in order to achieve the best possible outcome, is still a pioneering concept, and the all-encompassing data is still scarce. Although several articles have been published on this matter, to this date there is no systematic overview pointing out the benefits that OCP can bring in the field of drug delivery. Here we offer a comprehensive overview, starting from the OCP synthesis to its structure, morphology, and the biological significance OCP has.
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14
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Xiao L, Shiwaku Y, Hamai R, Tsuchiya K, Sasaki K, Suzuki O. Macrophage Polarization Related to Crystal Phases of Calcium Phosphate Biomaterials. Int J Mol Sci 2021; 22:ijms222011252. [PMID: 34681912 PMCID: PMC8538944 DOI: 10.3390/ijms222011252] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/27/2021] [Accepted: 10/11/2021] [Indexed: 11/16/2022] Open
Abstract
Calcium phosphate (CaP) materials influence macrophage polarization during bone healing. However, the effect of the crystal phase of CaP materials on the immune response of bone remains unclear. In this study, the effect of the crystal phases of CaP materials on the regulation of macrophage polarization was investigated. Human THP-1 cells and mouse RAW 264 cells were cultured with octacalcium phosphate (OCP) and its hydrolyzed form Ca-deficient hydroxyapatite to assess the expression of pro-inflammatory M1 and anti-inflammatory M2 macrophage-related genes. OCP inhibited the excessive inflammatory response and switched macrophages to the anti-inflammatory M2 phenotype, which promoted the expression of the interleukin 10 (IL10) gene. In contrast, HL stimulated an excessive inflammatory response by promoting the expression of pro-inflammatory M1 macrophage-related genes. To observe changes in the microenvironment induced by OCP and HL, inorganic phosphate (Pi) and calcium ion (Ca2+) concentrations and pH value in the medium were measured. The expression of the pro-inflammatory M1 macrophage-related genes (tumor necrosis factor alpha (TNFα) and interlukin 1beta (IL1β)) was closely related to the increase in ion concentration caused by the increase in the CaP dose. Together, these results suggest that the microenvironment caused by the crystal phase of CaP materials may be involved in the immune-regulation capacity of CaP materials.
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Affiliation(s)
- Linghao Xiao
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (L.X.); (Y.S.); (R.H.); (K.T.)
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (L.X.); (Y.S.); (R.H.); (K.T.)
- Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (L.X.); (Y.S.); (R.H.); (K.T.)
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (L.X.); (Y.S.); (R.H.); (K.T.)
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (L.X.); (Y.S.); (R.H.); (K.T.)
- Correspondence:
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15
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Fan L, Zhang Y, Hu J, Fang Y, Hu R, Shi W, Ren B, Lin C, Tian ZQ. Surface Properties of Octacalcium Phosphate Nanocrystals Are Crucial for Their Bioactivities. ACS OMEGA 2021; 6:25372-25380. [PMID: 34632195 PMCID: PMC8495883 DOI: 10.1021/acsomega.1c03278] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Indexed: 06/13/2023]
Abstract
The fundamental structure-biofunction relationship of calcium phosphates (CaPs) remains unclear despite their clinical successes as important biomaterials. Herein, a series of CaP coatings with gradual change of topography and crystallinity is constructed by electrochemical deposition, and the roles of the two basic physicochemical properties are scrutinized for further understanding the mechanism behind the superior bioactivities of octacalcium phosphate (OCP). We observe a distinct modulation on cell proliferation on the prepared CaP coatings for different cells. The magnitude of the modulation seems to depend on the cellular size, and the effect is attributed mainly to the microstructure of the coatings. On the other hand, the crystallinity manifests its significance for the osteogenic property of the OCP coatings. Further transmission electron microscopy analysis and density functional theory calculations reveal a surface rich in HPO4 2- for the high-crystalline OCP nanocrystals. The results highlight that the nanocrystal surface properties of the OCP coatings, including the periodic structure and the HPO4 2- composition, may play significant roles surpassing the ion release effect in determining its osteogenic property, probably via surface spatial and/or chemical recognitions. The present findings shed light on the fundamental understanding of the structure-biofunction relationship for CaP biomaterials.
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Affiliation(s)
- Lili Fan
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen, Fujian 361005, China
- Department
of Biomaterials, College of Materials, Xiamen
University, Xiamen, Fujian 361005, China
| | - Yanmei Zhang
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen, Fujian 361005, China
| | - Jiejie Hu
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen, Fujian 361005, China
| | - Yuan Fang
- Department
of Chemistry, Fudan University, Shanghai 200433, China
| | - Ren Hu
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen, Fujian 361005, China
| | - Wei Shi
- Department
of Biomaterials, College of Materials, Xiamen
University, Xiamen, Fujian 361005, China
| | - Bin Ren
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen, Fujian 361005, China
| | - Changjian Lin
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen, Fujian 361005, China
| | - Zhong-Qun Tian
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, College of
Chemistry and Chemical Engineering, Xiamen
University, Xiamen, Fujian 361005, China
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16
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Shiwaku Y, Hamai R, Sato S, Sakai S, Tsuchiya K, Baba K, Takahashi T, Suzuki O. Bone Tissue Response to Different Grown Crystal Batches of Octacalcium Phosphate in Rat Long Bone Intramedullary Canal Area. Int J Mol Sci 2021; 22:9770. [PMID: 34575928 PMCID: PMC8466561 DOI: 10.3390/ijms22189770] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/25/2021] [Accepted: 09/04/2021] [Indexed: 11/16/2022] Open
Abstract
The microstructure of biomaterials influences the cellular and biological responses in the bone. Octacalcium phosphate (OCP) exhibits higher biodegradability and osteoconductivity than hydroxyapatite (HA) during the conversion process from OCP to HA. However, the effect of the microstructure of OCP crystals on long tubular bones has not been clarified. In this study, two types of OCPs with different microstructures, fine-OCP (F-OCP) and coarse-OCP (C-OCP), were implanted in rat tibia for 4 weeks. F-OCP promoted cortical bone regeneration compared with C-OCP. The osteoclasts appearance was significantly higher in the C-OCP group than in the control group (defect only) at 1-week post-implantation. To investigate whether the solubility equilibrium depends on the different particle sizes of OCPs, Nano-OCP, which consisted of nanometer-sized OCPs, was prepared. The degree of supersaturation (DS) tended to decrease modestly in the order of C-OCP, F-OCP, and Nano-OCP with respect to HA and OCP in Tris-HCl buffer. F-OCP showed a higher phosphate ion concentration and lower calcium ion concentration after immersion in the buffer than C-OCP. The crystal structures of both OCPs tended to be converted to HA by rat abdominal implantation. These results suggest that differences in the microstructure of OCPs may affect osteoclastogenesis and result in osteoconductivity of this material in long tubular bone by altering dissolution behavior.
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Affiliation(s)
- Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.S.); (R.H.); (S.S.); (S.S.); (K.T.); (K.B.)
- Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.S.); (R.H.); (S.S.); (S.S.); (K.T.); (K.B.)
| | - Shinichi Sato
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.S.); (R.H.); (S.S.); (S.S.); (K.T.); (K.B.)
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Susumu Sakai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.S.); (R.H.); (S.S.); (S.S.); (K.T.); (K.B.)
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.S.); (R.H.); (S.S.); (S.S.); (K.T.); (K.B.)
| | - Kazuyoshi Baba
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.S.); (R.H.); (S.S.); (S.S.); (K.T.); (K.B.)
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan;
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; (Y.S.); (R.H.); (S.S.); (S.S.); (K.T.); (K.B.)
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17
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Saito S, Hamai R, Shiwaku Y, Hasegawa T, Sakai S, Tsuchiya K, Sai Y, Iwama R, Amizuka N, Takahashi T, Suzuki O. Involvement of distant octacalcium phosphate scaffolds in enhancing early differentiation of osteocytes during bone regeneration. Acta Biomater 2021; 129:309-322. [PMID: 34033969 DOI: 10.1016/j.actbio.2021.05.017] [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: 01/30/2021] [Revised: 04/27/2021] [Accepted: 05/13/2021] [Indexed: 12/19/2022]
Abstract
This study hypothesized that distant octacalcium phosphate (OCP) scaffolds may enhance osteocyte differentiation in newly formed bone matrices. The results obtained were compared with those of Ca-deficient hydroxyapatite (OCP hydrolyzate, referred to as HL hereafter). Granular OCP and HL, 300-500 µm in diameter, were implanted in critical-sized rat calvarial defects for eight weeks and subjected to histology, immunohistochemistry, histomorphometry, and transmission electron microscopy (TEM). Early osteocyte differentiation from an osteoblastic cell line (IDG-SW3) was examined using materials without contacting the surfaces for 10 days. The material properties and the medium composition were analyzed through selected area electron diffraction (SAED) using TEM observation and curve fitting of Fourier transform infrared (FT-IR) spectroscopy. The number of positive cells of an osteocyte earlier differentiation marker podoplanin (PDPN) in bone matrices, along the direction of bone formation, was significantly higher in OCP than that in HL. The ultrastructure around the OCP surfaces observed by TEM showed the infiltration of some cells, including osteocytes adjacent to the OCP surface layers. The OCP structure remained unchanged by SAED analysis. Nanoparticle deposition and hydrolysis on OCP surfaces were detected by TEM and FT-IR, respectively, during early osteocyte differentiation in vitro. The medium saturation degree varied in accord with ionic dissolution, resulting in possible hydroxyapatite formation on OCP but not on HL. These results suggested that OCP stimulates early osteocyte differentiation in the bone matrix from a distance through its metastable chemical properties. STATEMENT OF SIGNIFICANCE: This study demonstrated that octacalcium phosphate (OCP) implanted in critical-sized rat calvaria bone defects is capable of enhancing the early differentiation of osteocytes embedded in newly formed bone matrices, even when the surface OCP is separated from the osteocytes. This prominent bioactive property of OCP was demonstrated by comparing the in vivo and in vitro performances with a control material, Ca-deficient hydroxyapatite (OCP hydrolyzate). The findings were elucidated by histomorphometry, which analyzed the differentiation of osteocytes along the parallel direction of new bone growth by osteoblasts. Therefore, OCP should stimulate osteocyte differentiation through ionic dissolution even in vivo owing to its metastable chemical properties, as previously reported in an in vitro study (Acta Biomater 69:362, 2018).
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18
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Ozaki H, Hamai R, Shiwaku Y, Sakai S, Tsuchiya K, Suzuki O. Mutual chemical effect of autograft and octacalcium phosphate implantation on enhancing intramembranous bone regeneration. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2021; 22:345-362. [PMID: 34104115 PMCID: PMC8168741 DOI: 10.1080/14686996.2021.1916378] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/22/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
This study examined the effect of a mixture of octacalcium phosphate (OCP) and autologous bone on bone regeneration in rat calvaria critical-sized defect (CSD). Mechanically mixed OCP and autologous bone granules (OCP+Auto), approximately 500 to 1000 μm in diameter, and each individual material were implanted in rat CSD for 8 weeks, and subjected to X-ray micro-computed tomography (micro-CT), histology, tartrate-resistant acid phosphatase (TRAP) staining, and histomorphometry for bone regeneration. Osteoblastic differentiation from mesenchymal stem cells (D1 cells) was examined in the presence of non-contacting materials by alkaline phosphatase (ALP) activity for 21 days. The material properties and medium composition before and after the incubation were determined by selected area electron diffraction (SAED) under transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and chemical analysis. The results showed that while bone formation coupled with TRAP-positive osteoclastic resorption and cellular ALP activity were the highest in the Auto group, a positive effect per OCP weight or per autologous bone weight on ALP activity was found. Although the OCP structure was maintained even after the incubation (SAED), micro-deposits were grown on OCP surfaces (TEM). Fibrous tissue was also exposed on the autologous bone surfaces (SEM). Through FT-IR absorption, it was determined that bone mineral-like characteristics of the phosphate group increased in the OCP + Auto group. These findings were interpreted as a structural change from OCP to the apatitic phase, a conclusion supported by the medium degree of saturation changes. The results demonstrate the mutual chemical effect of mixing OCP with autologous bone as an active bone substitute material.
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Affiliation(s)
- Hisashi Ozaki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Department of Dentistry, Oral and Maxillofacial Surgery, Yamagata Prefectural Central Hospital, Yamagata, Japan
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Susumu Sakai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
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19
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Oizumi I, Hamai R, Shiwaku Y, Mori Y, Anada T, Baba K, Miyatake N, Hamada S, Tsuchiya K, Nishimura SN, Itoi E, Suzuki O. Impact of simultaneous hydrolysis of OCP and PLGA on bone induction of a PLGA-OCP composite scaffold in a rat femoral defect. Acta Biomater 2021; 124:358-373. [PMID: 33556607 DOI: 10.1016/j.actbio.2021.01.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/05/2021] [Accepted: 01/29/2021] [Indexed: 02/07/2023]
Abstract
Effect of the simultaneous hydrolysis of octacalcium phosphate (OCP) and poly (lactic-co-glycolic acid) (PLGA) was investigated on its osteoconductivity. PLGA soaked in phosphate buffered saline with 0%, 20%, and 40% OCP at 37°C for eight weeks indicated that when the OCP dose was increased, 1) the weight loss of PLGA increased, 2) the glass transition temperature of the PLGAs decreased, 3) the saturation degree in the saline moved to nearly saturated condition with respect to hydroxyapatite (HA) but was undersaturated with respect to OCP, and 4) OCP tended to convert to HA by X-ray diffraction and Fourier transform infrared spectroscopy. OCP/PLGA composites of 20% and 40% with more than 92% porosity were produced by combining OCP granules with 1,4-dioxane-solubilizing PLGA followed by lyophilization and then subjected to four- and eight-week in vivo implantation tests in 3 mm diameter rat femora defects. Microfocus X-ray computed tomography, histochemical and histomorphometric analyses showed that while bone formation was very limited with PLGA implantation, the extent of repair tended to increase with increasing OCP content in the PLGA, coupled with PLGA degradation, and bridge the defects with trabecular bone. Tartrate-resistant acid phosphatase-positive osteoclast-like cells were accumulated four weeks after implantation, while osteocalcin-positive osteoblastic cells appeared later at eight weeks, especially in 40% OCP/PLGA. These results suggest that OCP hydrolysis, with phosphate ion release, enhances PLGA hydrolysis, probably through the acid catalysis function of the protons supplied during the hydrolysis of OCP, thereby inducing PLGA biodegradation and new bone formation in the femoral defects. STATEMENT OF SIGNIFICANCE: Octacalcium phosphate (OCP) enhances osteoblasts and osteocytes differentiations during its hydrolysis accompanying inorganic ions exchange in this material. The present study found that the advancement of OCP hydrolysis under physiological conditions had an effect on poly (lactic-co-glycolic acid) (PLGA) degradation through its chemical environmental change around OCP, which was ascertained by the decreases in weight loss and glass transition temperature of PLGA with increasing the dose of OCP co-present. Rat femur-penetrated standardized severe defects were found to repair through bridging the cortical region defect margin. PLGA degradation could be enhanced through an acid catalyst function by protons derived from inorganic phosphate (Pi) ions through OCP hydrolysis under bone forming condition, resulting in showing a prominent bone regenerative capacity in OCP/PLGA composite materials.
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Affiliation(s)
- Itsuki Oizumi
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan; Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Yu Mori
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Takahisa Anada
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka 819-0395, Japan
| | - Kazuyoshi Baba
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan; Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Naohisa Miyatake
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan; Tohoku Orthopedic Hospital, Sendai 981-3121, Japan
| | - Soshi Hamada
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan; Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Shin-Nosuke Nishimura
- Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka 819-0395, Japan
| | - Eiji Itoi
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan.
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20
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Petrakova NV, Teterina AY, Mikheeva PV, Akhmedova SA, Kuvshinova EA, Sviridova IK, Sergeeva NS, Smirnov IV, Fedotov AY, Kargin YF, Barinov SM, Komlev VS. In Vitro Study of Octacalcium Phosphate Behavior in Different Model Solutions. ACS OMEGA 2021; 6:7487-7498. [PMID: 33778261 PMCID: PMC7992079 DOI: 10.1021/acsomega.0c06016] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
Octacalcium phosphate (OCP), a new-generation bone substitute material, is a considered precursor of the biological bone apatite. The two-layered structure of OCP contains the apatitic and hydrated layers and is intensively involved in ion-exchange surface reactions, which results in OCP hydrolysis to hydroxyapatite and adsorption of ions or molecular groups presented in the environment. During various in vitro procedures, such as biomaterial solubility, additive release studies, or the functionalization technique, several model solutions are applied. The composition of the environmental solution affects the degree and rate of OCP hydrolysis, its surface reactivity, and further in vitro and in vivo properties. The performed study was aimed to track the structural changes of OCP-based materials while treating in the most popular model solutions of pH values 7.2-7.4: simulated body fluid (SBF), Dulbecco's phosphate-buffered saline (DPBS), supersaturated calcification solution (SCS), normal saline (NS), and Dulbecco's modified Eagle's medium (DMEM). Various degrees of OCP hydrolysis and/or precipitate formation were achieved through soaking initial OCP granules in the model solutions. Detailed data of X-ray diffraction, Fourier-transform infrared spectroscopy, atomic emission spectrometry with inductively coupled plasma, and scanning electron microscopy are presented. Cultivation of osteosarcoma cells was implemented on OCP pre-treated in DMEM for 1-28 days. It was shown that NS mostly degraded the OCP structure. DPBS slightly changed the OCP structure during the first treatment term, and during further terms, the crystals got thinner and OCP hydrolysis took place. Treatment in SBF and SCS caused the precipitate formation along with OCP hydrolysis, with a larger contribution of SCS solution to precipitation. Pre-treating in DMEM enhanced the cytocompatibility of materials. As a result, on performing the in vitro procedures, careful selection of the contact solution should be made to avoid the changes in materials structure and properties and get adequate results.
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Affiliation(s)
- Nataliya V. Petrakova
- Ceramic
Composite Materials, A.A. Baikov Institute
of Metallurgy and Materials Science RAS, Leninskiy Prospect 49, Moscow 119334, Russia
| | - Anastasia Yu. Teterina
- Ceramic
Composite Materials, A.A. Baikov Institute
of Metallurgy and Materials Science RAS, Leninskiy Prospect 49, Moscow 119334, Russia
| | - Polina V. Mikheeva
- Ceramic
Composite Materials, A.A. Baikov Institute
of Metallurgy and Materials Science RAS, Leninskiy Prospect 49, Moscow 119334, Russia
| | - Suraya A. Akhmedova
- Forecast
Lab, P.A. Herzen Moscow Research Oncology
Institute−Branch of FSBI NMRRC of the Ministry of Health of
Russia, The 2-nd Botkinskiy
pr, 3, Moscow 125284, Russia
| | - Ekaterina A. Kuvshinova
- Forecast
Lab, P.A. Herzen Moscow Research Oncology
Institute−Branch of FSBI NMRRC of the Ministry of Health of
Russia, The 2-nd Botkinskiy
pr, 3, Moscow 125284, Russia
| | - Irina K. Sviridova
- Forecast
Lab, P.A. Herzen Moscow Research Oncology
Institute−Branch of FSBI NMRRC of the Ministry of Health of
Russia, The 2-nd Botkinskiy
pr, 3, Moscow 125284, Russia
| | - Natalya S. Sergeeva
- Forecast
Lab, P.A. Herzen Moscow Research Oncology
Institute−Branch of FSBI NMRRC of the Ministry of Health of
Russia, The 2-nd Botkinskiy
pr, 3, Moscow 125284, Russia
| | - Igor V. Smirnov
- Ceramic
Composite Materials, A.A. Baikov Institute
of Metallurgy and Materials Science RAS, Leninskiy Prospect 49, Moscow 119334, Russia
| | - Alexander Yu. Fedotov
- Ceramic
Composite Materials, A.A. Baikov Institute
of Metallurgy and Materials Science RAS, Leninskiy Prospect 49, Moscow 119334, Russia
| | - Yuriy F. Kargin
- Ceramic
Composite Materials, A.A. Baikov Institute
of Metallurgy and Materials Science RAS, Leninskiy Prospect 49, Moscow 119334, Russia
| | - Sergey M. Barinov
- Ceramic
Composite Materials, A.A. Baikov Institute
of Metallurgy and Materials Science RAS, Leninskiy Prospect 49, Moscow 119334, Russia
| | - Vladimir S. Komlev
- Ceramic
Composite Materials, A.A. Baikov Institute
of Metallurgy and Materials Science RAS, Leninskiy Prospect 49, Moscow 119334, Russia
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21
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Saengdet P(M, Ogawa M. Directional growth of octacalcium phosphate using micro-flow reactor mixing and subsequent aging. RSC Adv 2021; 11:15969-15976. [PMID: 35481191 PMCID: PMC9031023 DOI: 10.1039/d1ra00827g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 04/19/2021] [Indexed: 12/22/2022] Open
Abstract
Well-defined belt-shaped particles of octacalcium phosphate were prepared by mixing aqueous solutions of calcium acetate and that of sodium phosphate monobasic with the aid of a micro-flow reactor. Higher crystallinity and narrower particle size distribution were achieved by the micro-flow reactor if compared with the results of the batch reaction using the same solutions. The width of the belt was controlled by the mixing temperature (0.8 and 2.3 μm for the preparation at 50 and 70 °C, respectively). Post mixing aging at 50 °C, resulted in the directional growth of belt-shaped particles to obtain particles with the length of 17 μm (aspect ratio of 53). XRD and TEM analysis indicated that the micro-flow reactor could separate nucleation and growth allowing preferential growth along the a-direction. Well-defined octacalcium phosphate particles with varied size and aspect ratio were prepared by a micro-flow reactor mixing and subsequent aging in different temperature and aging time. ![]()
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Affiliation(s)
- Ploypailin (Milin) Saengdet
- School of Energy Science and Engineering
- Vidyasirimedhi Institute of Science and Technology (VISTEC)
- Rayong 21210
- Thailand
| | - Makoto Ogawa
- School of Energy Science and Engineering
- Vidyasirimedhi Institute of Science and Technology (VISTEC)
- Rayong 21210
- Thailand
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22
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Tsuchiya K, Hamai R, Sakai S, Suzuki O. Comparative analysis of bovine serum albumin adsorption onto octacalcium phosphate crystals prepared using different methods. Dent Mater J 2020; 39:883-891. [PMID: 32448850 DOI: 10.4012/dmj.2019-250] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study compared bovine serum albumin (BSA) adsorption onto octacalcium phosphate (OCP) materials prepared from two wet preparations in the absence (w-OCP) and presence (c-OCP) of gelatin. Raman spectroscopy was used to analyze the BSA adsorption onto OCPs in a 150 mM Tris-HCl buffer containing 0.5 mM calcium and inorganic phosphate (Pi) ions at pH 7.4 and at 37°C. The degree of supersaturation of the supernatants after the adsorption was determined by measuring the ion composition. The results showed that BSA adsorption onto w-OCP was higher than that for c-OCP. The calcium ion concentration of the supernatant decreased for both w-OCP and c-OCP, whereas the Pi ion concentration increased, approaching OCP equilibria at different saturation levels. BSA adsorbed even onto c-OCP, which included a small amount of gelatin during c-OCP preparation. These results indicate that the biodegradability of w-OCP and c-OCP may be modulated through interactions with serum proteins.
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Affiliation(s)
- Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry
| | - Susumu Sakai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry
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23
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Suzuki O, Shiwaku Y, Hamai R. Octacalcium phosphate bone substitute materials: Comparison between properties of biomaterials and other calcium phosphate materials. Dent Mater J 2020; 39:187-199. [PMID: 32161239 DOI: 10.4012/dmj.2020-001] [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: 11/23/2022]
Abstract
Octacalcium phosphate (OCP) is a material that can be converted to hydroxyapatite (HA) under physiological environments and is considered a mineral precursor to bone apatite crystals. The structure of OCP consists of apatite layers stacked alternately with hydrated layers, and closely resembles the structure of HA. The performance of OCP as a bone substitute differs from that of HA materials in terms of their osteoconductivity and biodegradability. OCP manifests a cellular phagocytic response through osteoclast-like cells similar to that exhibited by the biodegradable material β-tricalcium phosphate (β-TCP). The use of OCP for human cranial bone defects involves using its granule or composite form with one of the natural polymers, viz., the reconstituted collagen. This review article discusses the differences and similarities in these calcium phosphate (Ca-P)-based materials from the viewpoint of the structure and their material chemistry, and attempts to elucidate why Ca-P materials, particularly OCP, display unique osteoconductive property.
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Affiliation(s)
- Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry
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24
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Ding X, Li A, Yang F, Sun K, Sun X. β-tricalcium phosphate and octacalcium phosphate composite bioceramic material for bone tissue engineering. J Biomater Appl 2020; 34:1294-1299. [PMID: 32028822 DOI: 10.1177/0885328220903989] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Xinxin Ding
- Key Laboratory of Liquid-Solid Structure Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jinan, China.,Shandong Provincial Key Laboratory of Engineering Ceramics, School of Materials Science and Engineering, Shandong University, Jinan, China
| | - Aimin Li
- Key Laboratory of Liquid-Solid Structure Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jinan, China.,Shandong Provincial Key Laboratory of Engineering Ceramics, School of Materials Science and Engineering, Shandong University, Jinan, China
| | - Fushuai Yang
- Key Laboratory of Liquid-Solid Structure Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jinan, China.,Shandong Provincial Key Laboratory of Engineering Ceramics, School of Materials Science and Engineering, Shandong University, Jinan, China
| | - Kangning Sun
- Key Laboratory of Liquid-Solid Structure Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jinan, China.,Shandong Provincial Key Laboratory of Engineering Ceramics, School of Materials Science and Engineering, Shandong University, Jinan, China
| | - Xiaoning Sun
- Key Laboratory of Liquid-Solid Structure Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jinan, China.,Shandong Provincial Key Laboratory of Engineering Ceramics, School of Materials Science and Engineering, Shandong University, Jinan, China
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25
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Baba K, Shiwaku Y, Hamai R, Mori Y, Anada T, Tsuchiya K, Oizumi I, Miyatake N, Itoi E, Suzuki O. Chemical Stability-Sensitive Osteoconductive Performance of Octacalcium Phosphate Bone Substitute in an Ovariectomized Rat Tibia Defect. ACS APPLIED BIO MATERIALS 2020; 3:1444-1458. [DOI: 10.1021/acsabm.9b01091] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuyoshi Baba
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
- Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Yu Mori
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Takahisa Anada
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
- Department of Applied Chemistry, Graduate School of Engineering Kyushu University, Fukuoka 819-0395, Japan
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Itsuki Oizumi
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Naohisa Miyatake
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
- Tohoku Orthopedic Hospital, Sendai 981-3121, Japan
| | - Eiji Itoi
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
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26
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Kawai T, Kamakura S, Matsui K, Fukuda M, Takano H, Iino M, Ishikawa S, Kawana H, Soma T, Imamura E, Kizu H, Michibata A, Asahina I, Miura K, Nakamura N, Kibe T, Suzuki O, Takahashi T. Clinical study of octacalcium phosphate and collagen composite in oral and maxillofacial surgery. J Tissue Eng 2020; 11:2041731419896449. [PMID: 32030119 PMCID: PMC6978823 DOI: 10.1177/2041731419896449] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 12/02/2019] [Indexed: 11/17/2022] Open
Abstract
Octacalcium phosphate and its collagen composite have been recognized as bone
substitute materials possessing osteoconductivity and biodegradation properties.
We evaluated the effectiveness of octacalcium phosphate and its collagen
composite used for bone augmentation in major oral and maxillofacial surgeries
in a clinical trial. Octacalcium phosphate and its collagen composite were used
in cases of sinus floor elevation in 1- and 2-stage, socket preservation, cyst,
and alveolar cleft procedures. A total of 60 patients were evaluated for
effectiveness after the implantation of octacalcium phosphate and its collagen
composite. Although sinus floor elevation in 1-stage, cyst, and alveolar cleft
cases met the criteria for the judgment of success, sinus floor elevation in
2-stage and socket preservation groups did not meet the criteria in the initial
evaluation. However, an additional evaluation for reconfirmation revealed the
effectiveness of octacalcium phosphate and its collagen composite in those
groups, and all evaluation results ultimately indicated the success of this
clinical trial. Therefore, this clinical trial suggested that application of
octacalcium phosphate and its collagen composite for oral and maxillofacial
surgery was safe and effective and that octacalcium phosphate and its collagen
composite could be a bone substitute candidate instead of autologous bone.
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Affiliation(s)
- Tadashi Kawai
- Department of Oral Medicine and Surgery, Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Shinji Kamakura
- Department of Bone Regenerative Engineering, Division of Regenerative and Biomedical Engineering, Tohoku University Graduate School of Biomedical Engineering, Sendai, Japan
| | - Keiko Matsui
- Department of Oral Medicine and Surgery, Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Masayuki Fukuda
- Department of Dentistry and Oral Surgery, Akita University Graduate School of Medicine, Akita, Japan
| | - Hiroshi Takano
- Department of Dentistry and Oral Surgery, Akita University Graduate School of Medicine, Akita, Japan
| | - Mitsuyoshi Iino
- Department of Dentistry, Oral and Maxillofacial-Plastic and Reconstructive Surgery, School of Medicine, Yamagata University, Yamagata, Japan
| | - Shigeo Ishikawa
- Department of Dentistry, Oral and Maxillofacial-Plastic and Reconstructive Surgery, School of Medicine, Yamagata University, Yamagata, Japan
| | - Hiromasa Kawana
- Department of Dentistry and Oral Surgery, Division of Oral and Maxillofacial Surgery, School of Medicine, Keio University, Tokyo, Japan.,Department of Oral and Maxillofacial Implantology, Kanagawa Dental University, Kanagawa, Japan
| | - Tomoya Soma
- Department of Dentistry and Oral Surgery, Division of Oral and Maxillofacial Surgery, School of Medicine, Keio University, Tokyo, Japan
| | - Eisaku Imamura
- Department of Oral and Maxillofacial Surgery, Yokohama General Hospital, Kanagawa, Japan
| | - Hideki Kizu
- Department of Dentistry and Oral Surgery, Tachikawa Hospital, Tachikawa, Japan
| | - Aya Michibata
- Department of Oral Surgery, Shizuoka City Shimizu Hospital, Shizuoka, Japan
| | - Izumi Asahina
- Department of Regenerative Oral Surgery, Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Keiichiro Miura
- Department of Regenerative Oral Surgery, Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Norifumi Nakamura
- Department of Oral and Maxillofacial Surgery, Field of Oral and Maxillofacial Rehabilitation, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Toshiro Kibe
- Department of Oral and Maxillofacial Surgery, Field of Oral and Maxillofacial Rehabilitation, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Osamu Suzuki
- Department of Craniofacial Engineering and Regeneration, Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Tetsu Takahashi
- Department of Oral Medicine and Surgery, Division of Oral and Maxillofacial Surgery, Tohoku University Graduate School of Dentistry, Sendai, Japan
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27
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Sargolzaei-Aval F, Saberi E, Arab M, Sargolzaei N, Zare E, Shahraki H, Sanchooli T, Sargolzaeiaval F, Arab M. Reconstruction of mandibular defects using synthetic octacalcium phosphate combined with bone matrix gelatin in rat model. Dent Res J (Isfahan) 2020. [DOI: 10.4103/1735-3327.276228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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28
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Su Y, Cockerill I, Zheng Y, Tang L, Qin YX, Zhu D. Biofunctionalization of metallic implants by calcium phosphate coatings. Bioact Mater 2019; 4:196-206. [PMID: 31193406 PMCID: PMC6529680 DOI: 10.1016/j.bioactmat.2019.05.001] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 04/26/2019] [Accepted: 05/14/2019] [Indexed: 01/07/2023] Open
Abstract
Metallic materials have been extensively applied in clinical practice due to their unique mechanical properties and durability. Recent years have witnessed broad interests and advances on surface functionalization of metallic implants for high-performance biofunctions. Calcium phosphates (CaPs) are the major inorganic component of bone tissues, and thus owning inherent biocompatibility and osseointegration properties. As such, they have been widely used in clinical orthopedics and dentistry. The new emergence of surface functionalization on metallic implants with CaP coatings shows promise for a combination of mechanical properties from metals and various biofunctions from CaPs. This review provides a brief summary of state-of-art of surface biofunctionalization on implantable metals by CaP coatings. We first glance over different types of CaPs with their coating methods and in vitro and in vivo performances, and then give insight into the representative biofunctions, i.e. osteointegration, corrosion resistance and biodegradation control, and antibacterial property, provided by CaP coatings for metallic implant materials.
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Affiliation(s)
- Yingchao Su
- Department of Biomedical Engineering, University of North Texas, Denton, TX, USA
| | - Irsalan Cockerill
- Department of Biomedical Engineering, University of North Texas, Denton, TX, USA
| | - Yufeng Zheng
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, China
| | - Liping Tang
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX, USA
| | - Yi-Xian Qin
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY, USA
| | - Donghui Zhu
- Department of Biomedical Engineering, University of North Texas, Denton, TX, USA
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29
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Sato T, Anada T, Hamai R, Shiwaku Y, Tsuchiya K, Sakai S, Baba K, Sasaki K, Suzuki O. Culture of hybrid spheroids composed of calcium phosphate materials and mesenchymal stem cells on an oxygen-permeable culture device to predict in vivo bone forming capability. Acta Biomater 2019; 88:477-490. [PMID: 30844570 DOI: 10.1016/j.actbio.2019.03.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/28/2019] [Accepted: 03/03/2019] [Indexed: 12/30/2022]
Abstract
Three-dimensional (3-D) cell culture can better mimic physiological conditions in which cells interact with adjacent cells and the extracellular matrix than monolayer culture. We have developed a 3-D cell culture device, the Oxy chip, which can be used to generate and supply oxygen to cell spheroids to prevent hypoxia. Here, we used the Oxy chip to generate hybrid spheroids comprising calcium phosphate (CaP) particles (hydroxyapatite (HA), β-tricalcium phosphate (β-TCP) or octacalcium phosphate (OCP)) and mesenchymal stem cells (MSCs, C3H10T1/2 cells or D1 cells) that can be used to analyze cell differentiation mechanisms. We showed that the 3-D cell-cell and cell-material interactions and oxygenation offered by the Oxy chip promoted osteoblastic differentiation of MSCs. We also used histomorphometric analysis of hematoxylin and eosin staining, quality analyses by μCT and collagen orientation observation with picrosirius red staining in bone regeneration following implantation of three CaPs in a critical-sized defect in mouse calvaria. The in vivo bone formation capacity of the three tested CaP materials was OCP ≥ β-TCP > HA: the newly formed bone by OCP had a structure relatively close to that of the calvaria intact bone. When MSCs were 3-D cultured with the CaP materials using the Oxy chip, the in vitro osteogenic capacity of these materials was highly similar to trends observed in vivo. The in vitro alkaline phosphatase activity of D1 cells had the highest correlation with in vivo bone volume (R = 0.900). Chemical and FTIR spectroscopic analyses confirmed that differentiation of D1 cells could be associated with amorphous calcium phosphate (ACP) precipitation concomitant with OCP hydrolysis. Taken together, hybrid spheroid cultures using the Oxy chip can be used to screen and predict bone forming potential of bone substitute materials. STATEMENT OF SIGNIFICANCE: An oxygen permeable-culture chip (Oxy chip) can be used to induce formation of cell spheroids by mesenchymal stem cells (MSCs). Use of the Oxy chip avoids hypoxia in the spheroid core and enhances MSC osteoblastic differentiation relative to conventional spheroid culture methods. The present study showed that the Oxy chip mimics the in vivo environment associated with bone formation and can be used to generate hybrid spheroids consisting of calcium phosphates and MSCs that are useful for analyzing cell differentiation mechanisms. Bone formation analysis following implantation of calcium phosphate materials in mouse calvaria defects showed positive correlation with the in vitro results. We propose that hybrid spheroids cultured on the Oxy chip can be used to screen and predict the bone forming potential of bone substitute materials.
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30
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Angiogenesis involvement by octacalcium phosphate-gelatin composite-driven bone regeneration in rat calvaria critical-sized defect. Acta Biomater 2019; 88:514-526. [PMID: 30776505 DOI: 10.1016/j.actbio.2019.02.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/26/2019] [Accepted: 02/14/2019] [Indexed: 12/29/2022]
Abstract
Effect of octacalcium phosphate/gelatin composite (OCP/Gel) on angiogenesis was studied by its implantation in rat calvaria critical-sized defect in relation to bone regeneration for 2 and 4 weeks. The implantation of OCP/Gel disks was analyzed by radiomorphometry using a radiopaque material perfusion (Microfil®) method and histomorphometry by hematoxylin and eosin-staining before and after the decalcification. Effect of the OCP dose in the range up to 4 mg per well on the capillary-like tube formation by human umbilical vein endothelial cells (HUVECs) was also examined in a transwell cell culture. The results showed that the blood vessels formation by OCP/Gel group was significantly higher at 2 weeks than other groups but decreased at 4 weeks during the advancement of new bone formation. The capillary-like tube formation was highest in an OCP dose of 1 mg per well while other OCP doses above or below 1 mg did not show such a stimulatory effect. The results established both in vivo and in vitro confirmed that OCP has a positive effect on angiogenesis during bone regeneration in a suitable dose ranges, suggesting that the angiogenesis stimulated by OCP could be involved in the OCP/Gel-enhanced bone regeneration. STATEMENT OF SIGNIFICANCE: We have reported that octacalcium phosphate (OCP) materials display stimulatory capacities on the bone tissue-related cells. However, the effect of OCP on the angiogenesis and its relation to the OCP-enhanced bone regeneration is unknown. This study confirmed the capacity of OCP on angiogenesis before increasing the new bone mass after the implantation of a composite of OCP and gelatin (OCP/Gel). The blood vessels formation took place associated with the area beginning of the new bone formation, which finally decreased together with development of bone formation. Because OCP was ascertained stimulating the capillary-like tube formation in HUVEC culture with a certain OCP dose, the present study is the first report showing the capacity of OCP on angiogenesis during the OCP/Gel-enhanced bone regeneration.
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31
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Shiwaku Y, Tsuchiya K, Xiao L, Suzuki O. Effect of calcium phosphate phases affecting the crosstalk between osteoblasts and osteoclasts in vitro. J Biomed Mater Res A 2019; 107:1001-1013. [PMID: 30684383 DOI: 10.1002/jbm.a.36626] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 09/12/2018] [Indexed: 11/08/2022]
Abstract
Previous studies have reported that octacalcium phosphate (OCP) enhances osteoblast differentiation and osteoclast formation during the hydrolysis process to hydroxyapatite (HA). However, the crystal phases that affect the crosstalk between osteoclasts and osteoblasts are unknown, which should determine the bone substitute material's property of OCP. The present study was designed to investigate whether the chemical composition and crystal structure of calcium phosphates affect osteoclast formation and the osteoclast-osteoblast crosstalk. Biodegradable β-tricalcium phosphate (β-TCP) was used as the control material. Osteoclasts were cultured on HA/OCP or HA/TCP disks and their cellular responses were assessed. Both OCP and β-TCP had a similar ability to create multinucleated osteoclasts. However, OCP promoted the expression of complement component 3a (C3a), a positive coupling factor, in osteoclasts, whereas β-TCP enhanced that of EphrinB2 (EfnB2) and collagen triple helix repeat containing 1 (Cthrc1). During osteoclast culture, phosphate ions were released from the crystals, and OCP-HA conversion was advanced in HA/OCP mixtures and OCP. X-ray diffraction analysis revealed no remarkable changes in the crystal structures of HA/TCP mixtures and β-TCP before and after osteoclast culture. These results indicate that the distinct chemical environment induced by the calcium phosphate phases affects the crosstalk between osteoclasts and osteoblasts. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1001-1013, 2019.
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Affiliation(s)
- Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Linghao Xiao
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan.,Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
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32
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Lin X, Hunziker EB, Liu T, Hu Q, Liu Y. Enhanced biocompatibility and improved osteogenesis of coralline hydroxyapatite modified by bone morphogenetic protein 2 incorporated into a biomimetic coating. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 96:329-336. [PMID: 30606540 DOI: 10.1016/j.msec.2018.11.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 08/31/2018] [Accepted: 11/13/2018] [Indexed: 11/17/2022]
Abstract
OBJECTIVES (1) To determine whether the biocompatibility of coralline hydroxyapatite (CHA) granules could be improved by using an octacalcium phosphate (OCP) coating layer, and/or functionalized with bone morphogenetic protein 2 (BMP-2), and (2) to investigate if BMP-2 incorporated into this coating is able to enhance its osteoinductive efficiency, in comparison to its surface-adsorbed delivery mode. METHODS CHA granules (0.25 g per sample) bearing a coating-incorporated depot of BMP-2 (20 μg/sample) together with the controls (CHA bearing an adsorbed depot of BMP-2; CHA granules with an OCP coating without BMP-2; pure CHA granules) were implanted subcutaneously in rats (n = 6 animals per group). Five weeks later, the implants were retrieved for histomorphometric analysis to quantify the volume of newly generated bone, bone marrow, fibrous tissue and foreign body giant cells (FBGCs). The osteoinductive efficiency of BMP-2 and the rates of CHA degradation were also determined. RESULTS The group with an OCP coating-incorporated depot of BMP-2 showed the highest volume and quality or bone, and the highest osteoinductive efficacy. OCP coating was able to reduce inflammatory responses (improve biocompatibility), and also simple adsorption of BMP-2 to CHA achieved this. CONCLUSIONS The biocompatibility of CHA granules (reduction of inflammation) was significantly improved by coating with a layer of OCP. Pure surface adsorption of BMP-2 to CHA also reduced inflammation. Incorporation of BMP-2 into the OCP coatings was associated with the highest volume and quality of bone, and the highest biocompatibility degree of the CHA granules. CLINICAL SIGNIFICANCE Higher osteoinductivity and improved biocompatibility of CHA can be obtained when a layer of BMP-2 functionalized OCP is deposited on the surfaces of CHA granules.
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Affiliation(s)
- Xingnan Lin
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, 210008 Nanjing, China; Department of Oral Implantology and Prosthetic Dentistry, Academic Centre of Dentistry Amsterdam (ACTA), VU University and University of Amsterdam, 1081LA Amsterdam, the Netherlands.
| | - Ernst B Hunziker
- Departments of Osteoporosis and Orthopaedic Surgery, Inselspital (University Hospital), Bern, 3010 Bern, Switzerland.
| | - Tie Liu
- Department of Oral Implantology, Hospital/School of Stomatology, Zhejiang University, 310003 Hangzhou, Zhejiang, China
| | - Qingang Hu
- Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital of Medical School, Nanjing University, 210008 Nanjing, China.
| | - Yuelian Liu
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre of Dentistry Amsterdam (ACTA), VU University and University of Amsterdam, 1081LA Amsterdam, the Netherlands.
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Maia FR, Musson DS, Naot D, da Silva LP, Bastos AR, Costa JB, Oliveira JM, Correlo VM, Reis RL, Cornish J. Differentiation of osteoclast precursors on gellan gum-based spongy-like hydrogels for bone tissue engineering. ACTA ACUST UNITED AC 2018; 13:035012. [PMID: 29442071 DOI: 10.1088/1748-605x/aaaf29] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Bone tissue engineering with cell-scaffold constructs has been attracting a lot of attention, in particular as a tool for the efficient guiding of new tissue formation. However, the majority of the current strategies used to evaluate novel biomaterials focus on osteoblasts and bone formation, while osteoclasts are often overlooked. Consequently, there is limited knowledge on the interaction between osteoclasts and biomaterials. In this study, the ability of spongy-like gellan gum and hydroxyapatite-reinforced gellan gum hydrogels to support osteoclastogenesis was investigated in vitro. First, the spongy-like gellan gum and hydroxyapatite-reinforced gellan gum hydrogels were characterized in terms of microstructure, water uptake and mechanical properties. Then, bone marrow cells isolated from the long bones of mice and cultured in spongy-like hydrogels were treated with 1,25-dihydroxyvitamin D3 to promote osteoclastogenesis. It was shown that the addition of HAp to spongy-like gellan gum hydrogels enables the formation of larger pores and thicker walls, promoting an increase in stiffness. Hydroxyapatite-reinforced spongy-like gellan gum hydrogels support the formation of the aggregates of tartrate-resistant acid phosphatase-stained cells and the expression of genes encoding DC-STAMP and Cathepsin K, suggesting the differentiation of bone marrow cells into pre-osteoclasts. The hydroxyapatite-reinforced spongy-like gellan gum hydrogels developed in this work show promise for future use in bone tissue scaffolding applications.
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Affiliation(s)
- F Raquel Maia
- 3B Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco GMR, Portugal. ICVS/3B-PT Government Associated Laboratory, Braga, Portugal
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Capacity of octacalcium phosphate to promote osteoblastic differentiation toward osteocytes in vitro. Acta Biomater 2018; 69:362-371. [PMID: 29378325 DOI: 10.1016/j.actbio.2018.01.026] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 01/05/2018] [Accepted: 01/18/2018] [Indexed: 11/21/2022]
Abstract
Octacalcium phosphate (OCP) has been shown to act as a nucleus for initial bone deposition and enhancing the early stages of osteoblastic differentiation. However, the effect on differentiation at the late stage into osteocytes has not been elucidated. The present study was designed to investigate whether OCP can promote the differentiation lineage from osteoblasts to late osteocytes using a clonal cell line IDG-SW3 compared to commercially available sintered β-tricalcium phosphate (β-TCP) and hydroxyapatite (HA) in a transwell cell culture. Special attention was paid to detect the progress of OCP hydrolysis associated with ionic dissolution products from this material. OCP induced the appearance of an alkaline phosphatase (ALP) peak in the IDG-SW3 cells compared to β-TCP and HA and increased SOST/sclerostin and FGF23 gene expression after 35 days of incubation. Analyses by X-ray diffraction, curve fitting of Fourier transform infrared spectra, and acid phosphate inclusion of the materials showed that OCP tended to hydrolyze to an apatitic structure during the incubation. Since the hydrolysis enhanced inorganic phosphate ion (Pi) release from OCP in the media, IDG-SW3 cells were further incubated in the conditioned media with an increased concentration of Pi in the presence or absence of phosphonoformic acid (PFA), which is an inhibitor of Pi transport within the cells. An increase in Pi concentration up to 1.5 mM raised ALP activity, while its positive effect was eliminated in the presence of 0.1 to 0.5 mM PFA. Calcium ions did not show such an effect. These results indicate the stimulatory capacity of OCP on osteoblastic differentiation toward osteocytes. STATEMENT OF SIGNIFICANCE Octacalcium phosphate (OCP) has been shown to have a superior osteoconductivity due to its capacity to enhance initial stage of osteoblast differentiation. However, the effect of OCP on the late osteoblastic differentiation into osteocyte is unknown. This study showed the capacity associated with the structural change of OCP. The data show that OCP released inorganic phosphate (Pi) ions while the hydrolysis advanced if soaked in the media, determined by chemical and physical analyses, and enhanced osteocytes differentiation of IDG-SW3 cells more than hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP). Conditioned elevated Pi-containing media in the absence of OCP enhanced the osteocyte differentiation in the range of the concentration induced by OCP, the effect of which was cancelled by the inhibitor of Pi-transporters.
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35
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Biomimetic fabrication of antibacterial calcium phosphates mediated by polydopamine. J Inorg Biochem 2018; 178:43-53. [DOI: 10.1016/j.jinorgbio.2017.10.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/20/2017] [Accepted: 10/08/2017] [Indexed: 12/17/2022]
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36
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Sakai S, Anada T, Tsuchiya K, Yamazaki H, Margolis HC, Suzuki O. Comparative study on the resorbability and dissolution behavior of octacalcium phosphate, β-tricalcium phosphate, and hydroxyapatite under physiological conditions. Dent Mater J 2017; 35:216-24. [PMID: 27041011 DOI: 10.4012/dmj.2015-255] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The dissolution behaviors of octacalcium phosphate (OCP), β-tricalcium phosphate (β-TCP), and hydroxyapatite (HA) were compared by implanting the materials in rat subcutaneous pouches for 8 weeks using a filter chamber or immersing them in simulated body fluid (SBF) or Tris-HCl buffer for 2 weeks at pH 7.4 and 37(o)C. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and chemical analysis were conducted on these materials. Degree of supersaturation (DS) in the two solutions immersed with each calcium phosphate material was calculated from their chemical compositions. The results showed that OCP partially converted to apatitic crystals, while β-TCP and HA remained unchanged after the implantation. The DS of the SBF solution remained slightly supersaturated with respect to OCP and β-TCP, but slightly undersaturated in the Tris-HCl buffer. These findings suggest that previously reported OCP and β-TCP biodegradation could be induced through cell-mediated osteoclastic resorption rather than a simple dissolution process.
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Affiliation(s)
- Susumu Sakai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry
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37
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Masuda T, Maruyama H, Arai F, Anada T, Tsuchiya K, Fukuda T, Suzuki O. Application of an indicator-immobilized-gel-sheet for measuring the pH surrounding a calcium phosphate-based biomaterial. J Biomater Appl 2017; 31:1296-1304. [DOI: 10.1177/0885328217699108] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The present study was designed to investigate the local microenvironment of octacalcium phosphate in a granule form upon biomolecules adsorption utilizing an indicator-immobilized-gel-sheet for measuring pH. We previously showed that octacalcium phosphate enhances bone regeneration during its progressive hydrolysis into hydroxyapatite if implanted in bone defects. The gel-sheet was made from a photocrosslinkable prepolymer solution, which can easily immobilize a pH indicator (bromothymol blue; BTB) in the hydrogel. The indicator-immobilized-gel-sheet was mounted on a biochip which was made of polydimethylsiloxane (PDMS) with a flow channel. The pH value was calculated by detecting the color changes in the gel-sheet and displayed as the pH distribution. After pre-adsorption of bovine albumin, β-lactoglobuline or cytochrome C onto octacalcium phosphate granules, the granules with the gel-sheet were further incubated in Tris-HCl buffer solution in the absence or presence of fluoride, known as an accelerator of octacalcium phosphate hydrolysis. pH values of the gel-sheet surrounding octacalcium phosphate granules showed a decrease from pH 7.4 to 6.6 in relation to the proteins adsorbed. Overall, the proposed pH-sensitive gel can be used to detect the pH around octacalcium phosphate granules with a high spatial resolution.
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Affiliation(s)
- Taisuke Masuda
- Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | | | - Fumihito Arai
- Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Takahisa Anada
- Graduate School of Dentistry, Tohoku University, Aoba-ku Sendai, Japan
| | - Kaori Tsuchiya
- Graduate School of Dentistry, Tohoku University, Aoba-ku Sendai, Japan
| | - Toshio Fukuda
- Faculty of Science and Technology, Meijo University, Nagoya, Japan
| | - Osamu Suzuki
- Graduate School of Dentistry, Tohoku University, Aoba-ku Sendai, Japan
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38
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Shen D, Horiuchi N, Nozaki S, Miyashin M, Yamashita K, Nagai A. Synthesis and enhanced bone regeneration of carbonate substituted octacalcium phosphate. Biomed Mater Eng 2017; 28:9-21. [PMID: 28269740 DOI: 10.3233/bme-171651] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Using a wet method, we have synthesized octacalcium phosphate carbonate, in which HPO42- in octacalcium phosphate is replaced with CO32-. The physical, crystal, and chemical properties of this new material were compared to octacalcium phosphate, Ca-deficient hydroxyapatite, and Ca-deficient carbonate apatite using X-ray diffraction, Fourier-transform infrared spectroscopy, inductively coupled plasma spectroscopy, and scanning electron microscopy. Surface roughness and morphology were also characterized, along with the ability to support proliferation and differentiation of MG63 cells, as measured by MTT and alkaline phosphatase assay. We found that octacalcium phosphate carbonate enhanced osteoblast proliferation more strongly than all other materials tested. Similarly, Ca-deficient carbonate apatite, a hydrolysate of octacalcium phosphate carbonate, stimulated osteoblast differentiation to a better extent than Ca-deficient hydroxyapatite, a carbonate-free hydrolysate of octacalcium phosphate. These results indicate that octacalcium phosphate carbonate has good biocompatibility and osteoconduction, and incorporation of carbonate into octacalcium phosphate and apatite enhances bone regeneration.
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Affiliation(s)
- Donghe Shen
- Department of Pediatric Dentistry, Division of Developmental Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo 113-8549, Japan.,Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan
| | - Naohiro Horiuchi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan
| | - Sosuke Nozaki
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan
| | - Michiyo Miyashin
- Department of Pediatric Dentistry, Division of Developmental Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo 113-8549, Japan
| | - Kimihiro Yamashita
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan
| | - Akiko Nagai
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan
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39
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Onuma K, Iijima M. Nanoparticles in β-tricalcium phosphate substrate enhance modulation of structure and composition of an octacalcium phosphate grown layer. CrystEngComm 2017. [DOI: 10.1039/c7ce01563a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Nanoparticles in the β-TCP substrate enhance structural modulation of an OCP grown layer.
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Affiliation(s)
- Kazuo Onuma
- National Institute of Advanced Industrial Science and Technology
- Tsukuba
- Japan
| | - Mayumi Iijima
- National Institute of Advanced Industrial Science and Technology
- Tsukuba
- Japan
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40
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Chiba S, Anada T, Suzuki K, Saito K, Shiwaku Y, Miyatake N, Baba K, Imaizumi H, Hosaka M, Itoi E, Suzuki O. Effect of resorption rate and osteoconductivity of biodegradable calcium phosphate materials on the acquisition of natural bone strength in the repaired bone. J Biomed Mater Res A 2016; 104:2833-42. [DOI: 10.1002/jbm.a.35828] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 06/24/2016] [Accepted: 07/06/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Shinpei Chiba
- Department of Orthopaedic Surgery; Tohoku University School of Medicine; Sendai 980-8574 Japan
- Division of Craniofacial Function Engineering; Tohoku University Graduate School of Dentistry; Sendai 980-8575 Japan
| | - Takahisa Anada
- Division of Craniofacial Function Engineering; Tohoku University Graduate School of Dentistry; Sendai 980-8575 Japan
| | - Kentaro Suzuki
- Department of Orthopaedic Surgery; Tohoku University School of Medicine; Sendai 980-8574 Japan
| | - Keisuke Saito
- Division of Craniofacial Function Engineering; Tohoku University Graduate School of Dentistry; Sendai 980-8575 Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering; Tohoku University Graduate School of Dentistry; Sendai 980-8575 Japan
| | | | - Kazuyoshi Baba
- Department of Orthopaedic Surgery; Tohoku University School of Medicine; Sendai 980-8574 Japan
| | - Hideki Imaizumi
- Department of Orthopedic Surgery; Osaki Citizen Hospital; Osaki 989-6183 Japan
| | - Masami Hosaka
- Department of Orthopaedic Surgery; Tohoku University School of Medicine; Sendai 980-8574 Japan
| | - Eiji Itoi
- Department of Orthopaedic Surgery; Tohoku University School of Medicine; Sendai 980-8574 Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering; Tohoku University Graduate School of Dentistry; Sendai 980-8575 Japan
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41
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Ishiko-Uzuka R, Anada T, Kobayashi K, Kawai T, Tanuma Y, Sasaki K, Suzuki O. Oriented bone regenerative capacity of octacalcium phosphate/gelatin composites obtained through two-step crystal preparation method. J Biomed Mater Res B Appl Biomater 2016; 105:1029-1039. [DOI: 10.1002/jbm.b.33640] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Revised: 01/21/2016] [Accepted: 02/03/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Risa Ishiko-Uzuka
- Division of Maxillofacial Prosthetic Clinic; Tohoku University Hospital; Sendai 980-8575 Japan
- Division of Craniofacial Function Engineering; Tohoku University Graduate of Dentistry; Sendai 980-8575 Japan
- Division of Advanced Prosthetic Dentistry; Tohoku University Graduate School of Dentistry; Sendai 980-8575 Japan
| | - Takahisa Anada
- Division of Craniofacial Function Engineering; Tohoku University Graduate of Dentistry; Sendai 980-8575 Japan
| | - Kazuhito Kobayashi
- Division of Craniofacial Function Engineering; Tohoku University Graduate of Dentistry; Sendai 980-8575 Japan
| | - Tadashi Kawai
- Division of Oral and Maxillofacial Surgery; Tohoku University Graduate School of Dentistry; Sendai 980-8575 Japan
| | - Yuji Tanuma
- Division of Oral and Maxillofacial Surgery; Tohoku University Graduate School of Dentistry; Sendai 980-8575 Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry; Tohoku University Graduate School of Dentistry; Sendai 980-8575 Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering; Tohoku University Graduate of Dentistry; Sendai 980-8575 Japan
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42
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Anada T, Sato T, Kamoya T, Shiwaku Y, Tsuchiya K, Takano-Yamamoto T, Sasaki K, Suzuki O. Evaluation of bioactivity of octacalcium phosphate using osteoblastic cell aggregates on a spheroid culture device. Regen Ther 2016; 3:58-62. [PMID: 31245473 PMCID: PMC6581819 DOI: 10.1016/j.reth.2016.02.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 01/27/2016] [Accepted: 02/10/2016] [Indexed: 11/24/2022] Open
Abstract
Much attention has been paid to three-dimensional cell culture systems in the field of regenerative medicine, since three-dimensional cellular aggregates, or spheroids, are thought to better mimic the in vivo microenvironments compared to conventional monolayer cultured cells. Synthetic calcium phosphate (CaP) materials are widely used as bone substitute materials in orthopedic and dental surgeries. Here we have developed a technique for constructing a hybrid spheroid consisting of mesenchymal stem cells (MSCs) and synthetic CaP materials using a spheroid culture device. We found that the device is able to generate uniform-sized CaP/cell hybrid spheroids rapidly and easily. The results showed that the extent of osteoblastic differentiation from MSCs was different when cells were grown on octacalcium phosphate (OCP), hydroxyapatite (HA), or β-tricalcium phosphate (β-TCP). OCP showed the greatest ability to increase the alkaline phosphatase activity of the spheroid cells. The results suggest that the spheroids with incorporated OCP may be an effective implantable hybrid consisting of scaffold material and cells for bone regeneration. It is also possible that this CaP-cell spheroid system may be used as an in vitro method for assessing the osteogenic induction ability of CaP materials.
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Affiliation(s)
- Takahisa Anada
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Tomoya Sato
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Takuo Kamoya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Teruko Takano-Yamamoto
- Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Hirayama B, Anada T, Shiwaku Y, Miyatake N, Tsuchiya K, Nakamura M, Takahashi T, Suzuki O. Immune cell response and subsequent bone formation induced by implantation of octacalcium phosphate in a rat tibia defect. RSC Adv 2016. [DOI: 10.1039/c6ra10834b] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present study was designed to investigate how octacalcium phosphate (OCP) induces an immune response and whether the response is involved in the biodegradation and subsequent bone formation by OCP implantation in bone defects.
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Affiliation(s)
- Bunichi Hirayama
- Division of Oral and Maxillofacial Surgery
- Tohoku University Graduate School of Dentistry
- Sendai
- Japan
- Division of Craniofacial Function Engineering
| | - Takahisa Anada
- Division of Craniofacial Function Engineering
- Tohoku University Graduate School of Dentistry
- Sendai 980-8575
- Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering
- Tohoku University Graduate School of Dentistry
- Sendai 980-8575
- Japan
- Liaison Center for Innovative Dentistry
| | | | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering
- Tohoku University Graduate School of Dentistry
- Sendai 980-8575
- Japan
| | - Masanori Nakamura
- Department of Oral Anatomy
- Showa University School of Dentistry
- Tokyo
- Japan
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial Surgery
- Tohoku University Graduate School of Dentistry
- Sendai
- Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering
- Tohoku University Graduate School of Dentistry
- Sendai 980-8575
- Japan
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44
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OKADA M, HIRAMATSU D, OKIHARA T, MATSUMOTO T. Adsorption and desorption behaviors of cetylpyridinium chloride on hydroxyapatite nanoparticles with different morphologies. Dent Mater J 2016; 35:651-8. [DOI: 10.4012/dmj.2015-420] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Masahiro OKADA
- Department of Biomaterials, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| | - Daisuke HIRAMATSU
- Department of Biomaterials, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| | - Takumi OKIHARA
- Department of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
| | - Takuya MATSUMOTO
- Department of Biomaterials, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
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45
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Saito K, Anada T, Shiwaku Y, Chiba S, Miyatake N, Suzuki K, Tsuchiya K, Suzuki O. Dose-dependent enhancement of octacalcium phosphate biodegradation with a gelatin matrix during bone regeneration in a rabbit tibial defect model. RSC Adv 2016. [DOI: 10.1039/c6ra07602e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present study was designed to investigate how the dose of granular octacalcium phosphate in a gelatin matrix affects its bone regenerative and biodegradable properties in a rabbit tibia defect.
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Affiliation(s)
- Keisuke Saito
- Division of Craniofacial Function Engineering
- Tohoku University Graduate School of Dentistry
- Sendai 980-8575
- Japan
| | - Takahisa Anada
- Division of Craniofacial Function Engineering
- Tohoku University Graduate School of Dentistry
- Sendai 980-8575
- Japan
| | - Yukari Shiwaku
- Division of Craniofacial Function Engineering
- Tohoku University Graduate School of Dentistry
- Sendai 980-8575
- Japan
- Liaison Center for Innovative Dentistry
| | - Shinpei Chiba
- Department of Orthopaedic Surgery
- Tohoku University School of Medicine
- Sendai
- Japan
| | | | | | - Kaori Tsuchiya
- Division of Craniofacial Function Engineering
- Tohoku University Graduate School of Dentistry
- Sendai 980-8575
- Japan
| | - Osamu Suzuki
- Division of Craniofacial Function Engineering
- Tohoku University Graduate School of Dentistry
- Sendai 980-8575
- Japan
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Dorozhkin SV. Calcium orthophosphates (CaPO 4): occurrence and properties. Prog Biomater 2015; 5:9-70. [PMID: 27471662 PMCID: PMC4943586 DOI: 10.1007/s40204-015-0045-z] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 11/05/2015] [Indexed: 01/02/2023] Open
Abstract
The present overview is intended to point the readers' attention to the important subject of calcium orthophosphates (CaPO4). This type of materials is of the special significance for the human beings because they represent the inorganic part of major normal (bones, teeth and antlers) and pathological (i.e., those appearing due to various diseases) calcified tissues of mammals. For example, atherosclerosis results in blood vessel blockage caused by a solid composite of cholesterol with CaPO4, while dental caries and osteoporosis mean a partial decalcification of teeth and bones, respectively, that results in replacement of a less soluble and harder biological apatite by more soluble and softer calcium hydrogenorthophosphates. Therefore, the processes of both normal and pathological calcifications are just an in vivo crystallization of CaPO4. Similarly, dental caries and osteoporosis might be considered as in vivo dissolution of CaPO4. In addition, natural CaPO4 are the major source of phosphorus, which is used to produce agricultural fertilizers, detergents and various phosphorus-containing chemicals. Thus, there is a great significance of CaPO4 for the humankind and, in this paper, an overview on the current knowledge on this subject is provided.
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The role of an octacalcium phosphate in the re-formation of infraspinatus tendon insertion. J Shoulder Elbow Surg 2015; 24:e175-84. [PMID: 25825137 DOI: 10.1016/j.jse.2015.01.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 01/10/2015] [Accepted: 01/21/2015] [Indexed: 02/01/2023]
Abstract
BACKGROUND To improve the success rate of rotator cuff repair, we investigated whether octacalcium phosphate (OCP) with gelatin (Gel) vehicle had a positive effect on tendon-to-bone healing. METHODS We assessed the histologic characteristics of the tendon-to-bone healing using the rabbit rotator cuff repair model. We divided the shoulders into 3 groups: control (without OCP/Gel composite), OCP/Gel composite (OCP+group), and Gel alone without OCP (Gel group) to evaluate the effectiveness of gelatin. RESULTS Both the number of newly formed tendon fibers and the Sharpey fibers at the repair site increased in the OCP+group compared with those in the other 2 groups on hematoxylin-eosin staining (P < .05). On immunohistochemical evaluation, both the bone and the fibers in the OCP+group demonstrated that type I collagen was picked up, whereas the newly formed tendon fibers and Sharpey fibers revealed type III collagen. CONCLUSION Treatment with OCP made collagen fibers and the Sharpey fibers, constituted by type I and type III collagens, increase at the tendon-to-bone insertion. It might be beneficial for the healing of rotator cuff tendon to bone.
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Kobayashi K, Anada T, Handa T, Kanda N, Yoshinari M, Takahashi T, Suzuki O. Osteoconductive property of a mechanical mixture of octacalcium phosphate and amorphous calcium phosphate. ACS APPLIED MATERIALS & INTERFACES 2014; 6:22602-11. [PMID: 25478703 DOI: 10.1021/am5067139] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The present study was designed to investigate the extent of osteoconductive property of a mechanical mixture of octacalcium phosphate (OCP) and amorphous calcium phosphate (ACP). OCP was mixed with ACP in granules that had a diameter of 300 and 500 μm, respectively, and at 25, 50, or 75 wt %. The physicochemical characteristics and the osteoconductive properties of the mixtures were compared with OCP alone or ACP alone through implantation into rat critical-sized calvaria defects for up to 12 weeks and simulated body fluid (SBF) immersion for 2 weeks. The mixtures of OCP and ACP, in particular the OCP 25 wt % and ACP 75 wt % (O25A75), had higher radiopacity compared to ACP and OCP alone. O25A75 induced greater enhancement of bone regeneration than ACP alone at 8 weeks and that than OCP alone at 12 weeks. X-ray diffraction and Fourier transform infrared (FTIR) analyses of the retrieved mixtures showed that ACP, OCP, and O25A75 tended to convert to hydroxyapatite (HA) after the implantation, while the structure of OCP remains without complete conversion after SBF immersion. Analyses by FTIR curve fitting of the solids and the degree of supersaturation of the SBF supported the observation that the existence of ACP enhances the kinetics of the conversion. Scanning electron microscopy found that the surface of O25A75 had distinct characteristics with OCP and ACP after SBF immersion. The results suggest that the extent of the osteoconduction of OCP could be controlled by the copresence of ACP most probably through the prevailing dissolution-precipitation of the surface of ACP crystals to form HA.
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Affiliation(s)
- Kazuhito Kobayashi
- Division of Oral and Maxillofacial Surgery and ‡Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry , Sendai, Miyagi 980-8575, Japan
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Komlev VS, Barinov SM, Bozo II, Deev RV, Eremin II, Fedotov AY, Gurin AN, Khromova NV, Kopnin PB, Kuvshinova EA, Mamonov VE, Rybko VA, Sergeeva NS, Teterina AY, Zorin VL. Bioceramics composed of octacalcium phosphate demonstrate enhanced biological behavior. ACS APPLIED MATERIALS & INTERFACES 2014; 6:16610-16620. [PMID: 25184694 DOI: 10.1021/am502583p] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Bioceramics are used to treat bone defects but in general do not induce formation of new bone, which is essential for regeneration process. Many aspects related to bioceramics synthesis, properties and biological response that are still unknown and, there is a great need for further development. In the most recent research efforts were aimed on creation of materials from biological precursors of apatite formation in humans. One possible precursor is octacalcium phosphate (OCP), which is believed to not only exhibit osteoconductivity but possess osteoinductive quality, the ability to induce bone formation. Here we propose a relatively simple route for OCP ceramics preparation with a specifically designed microstructure. Comprehensive study for OCP ceramics including biodegradation, osteogenic properties in ortopic and heterotopic models and limited clinical trials were performed that demonstrated enhanced biological behavior. Our results provide a possible new concept for the clinical applications of OCP ceramics.
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Affiliation(s)
- Vladimir S Komlev
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences , Moscow, Russia
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Zorin VL, Komlev VS, Zorina AI, Khromova NV, Solovieva EV, Fedotov AY, Eremin II, Kopnin PB. Octacalcium phosphate ceramics combined with gingiva-derived stromal cells for engineered functional bone grafts. Biomed Mater 2014; 9:055005. [DOI: 10.1088/1748-6041/9/5/055005] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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