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Fei D, Zhang Y, Wu J, Zhang H, Liu A, He X, Wang J, Li B, Wang Q, Jin Y. Ca v 1.2 regulates osteogenesis of bone marrow-derived mesenchymal stem cells via canonical Wnt pathway in age-related osteoporosis. Aging Cell 2019; 18:e12967. [PMID: 31120193 PMCID: PMC6612635 DOI: 10.1111/acel.12967] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 04/02/2019] [Accepted: 04/25/2019] [Indexed: 01/03/2023] Open
Abstract
Aims Age‐related bone mass loss is one of the most prevalent diseases that afflict the elderly population. The decline in the osteogenic differentiation capacity of bone marrow‐derived mesenchymal stem cells (BMMSCs) is regarded as one of the central mediators. Voltage‐gated Ca2+ channels (VGCCs) play an important role in the regulation of various cell biological functions, and disruption of VGCCs is associated with several age‐related cellular characteristics and systemic symptoms. However, whether and how VGCCs cause the decreased osteogenic differentiation abilities of BMMSCs have not been fully elucidated. Methods Voltage‐gated Ca2+ channels related genes were screened, and the candidate gene was determined in several aging models. Functional role of determined channel on osteogenic differentiation of BMMSCs was investigated through gain and loss of function experiments. Molecular mechanism was explored, and intervention experiments in vivo and in vitro were performed. Results We found that Cav1.2 was downregulated in these aging models, and downregulation of Cav1.2 in Zmpste24−/− BMMSCs contributed to compromised osteogenic capacity. Mechanistically, Cav1.2 regulated the osteogenesis of BMMSCs through canonical Wnt/β‐catenin pathway. Moreover, upregulating the activity of Cav1.2 mitigated osteoporosis symptom in Zmpste24−/− mice. Conclusion Impaired osteogenic differentiation of Zmpste24−/− BMMSCs can be partly attributed to the decreased Cav1.2 expression, which leads to the inhibition of canonical Wnt pathway. Bay K8644 treatment could be an applicable approach for treating age‐related bone loss by ameliorating compromised osteogenic differentiation capacity through targeting Cav1.2 channel.
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Affiliation(s)
- Dongdong Fei
- State Key Laboratory of Military Stomatology, Department of Periodontology, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture School of Stomatology The Fourth Military Medical University Xi’an China
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology The Fourth Military Medical University Xi’an China
| | - Yang Zhang
- Department of Orthopaedics, Xijing Hospital The Fourth Military Medical University Xi’an China
| | - Junjie Wu
- State Key Laboratory of Military Stomatology, Department of Orthodontics, National Clinical Research Center for Oral Diseases, Shaanxi Clinical Research Center for Oral Diseases School of Stomatology The Fourth Military Medical University Xi’an China
| | - Hui Zhang
- State Key Laboratory of Military Stomatology, Department of Orthodontics, National Clinical Research Center for Oral Diseases, Shaanxi Clinical Research Center for Oral Diseases School of Stomatology The Fourth Military Medical University Xi’an China
| | - Anqi Liu
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology The Fourth Military Medical University Xi’an China
| | - Xiaoning He
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology The Fourth Military Medical University Xi’an China
| | - Jinjin Wang
- State Key Laboratory of Military Stomatology, Department of Periodontology, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture School of Stomatology The Fourth Military Medical University Xi’an China
| | - Bei Li
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology The Fourth Military Medical University Xi’an China
| | - Qintao Wang
- State Key Laboratory of Military Stomatology, Department of Periodontology, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture School of Stomatology The Fourth Military Medical University Xi’an China
| | - Yan Jin
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology The Fourth Military Medical University Xi’an China
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Anract J, Baures M, Barry Delongchamps N, Capiod T. Microcalcifications, calcium-sensing receptor, and cancer. Cell Calcium 2019; 82:102051. [PMID: 31276858 DOI: 10.1016/j.ceca.2019.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 06/13/2019] [Accepted: 06/13/2019] [Indexed: 12/20/2022]
Abstract
Calcium stones and calculi are observed in numerous human tissues. They are the result of deposition of calcium salts and are due to high local calcium concentrations. Prostatic calculi are usually classified as endogenous or extrinsic stones. Endogenous stones are commonly caused by obstruction of the prostatic ducts around an enlarged prostate resulting from benign prostatic hyperplasia or from chronic inflammation. The latter occurs mainly around the urethra and is generally caused by reflux of urine into the prostate. Calcium concentrations higher than in the plasma at sites of infection may induce the chemotactic response that eventually leads to recruitment of inflammatory cells. The calcium sensing receptor (CaSR) may be crucial for this recruitment as its expression and activity are increased by cytokines such as IL-6 and high extracellular calcium concentrations, respectively. The links between calcium calculi, inflammation, calcium supplementation, and CaSR functions in prostate cancer patients will be discussed in this review.
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Affiliation(s)
- Julien Anract
- INSERM Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris 75014, France; Urology Department, Hôpital Cochin, Assistance Publique Hôpitaux de Paris, Paris 75014, France
| | - Manon Baures
- INSERM Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris 75014, France
| | - Nicolas Barry Delongchamps
- INSERM Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris 75014, France; Urology Department, Hôpital Cochin, Assistance Publique Hôpitaux de Paris, Paris 75014, France
| | - Thierry Capiod
- INSERM Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris 75014, France.
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Granel H, Bossard C, Nucke L, Wauquier F, Rochefort GY, Guicheux J, Jallot E, Lao J, Wittrant Y. Optimized Bioactive Glass: the Quest for the Bony Graft. Adv Healthc Mater 2019; 8:e1801542. [PMID: 30941912 DOI: 10.1002/adhm.201801542] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/25/2019] [Indexed: 12/21/2022]
Abstract
Technological advances have provided surgeons with a wide range of biomaterials. Yet improvements are still to be made, especially for large bone defect treatment. Biomaterial scaffolds represent a promising alternative to autologous bone grafts but in spite of the numerous studies carried out on this subject, no biomaterial scaffold is yet completely satisfying. Bioactive glass (BAG) presents many qualifying characteristics but they are brittle and their combination with a plastic polymer appears essential to overcome this drawback. Recent advances have allowed the synthesis of organic-inorganic hybrid scaffolds combining the osteogenic properties of BAG and the plastic characteristics of polymers. Such biomaterials can now be obtained at room temperature allowing organic doping of the glass/polymer network for a homogeneous delivery of the doping agent. Despite these new avenues, further studies are required to highlight the biological properties of these materials and particularly their behavior once implanted in vivo. This review focuses on BAG with a particular interest in their combination with polymers to form organic-inorganic hybrids for the design of innovative graft strategies.
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Affiliation(s)
- Henri Granel
- INRA, UMR 1019, UNH, CRNH Auvergne F‐63009 Clermont‐Ferrand France
- Université d'Auvergne, Unité de Nutrition HumaineClermont Université BP 10448 F‐63000 Clermont‐Ferrand France
| | - Cédric Bossard
- CNRS/IN2P3, Laboratoire de Physique de ClermontUniversité Clermont Auvergne BP 10448 F‐63000 Clermont‐Ferrand France
| | - Lisa Nucke
- Helmholtz‐Zentrum Dresden‐RossendorfInstitute of Ressource Ecology‐Bautzner Landstraße 400 01328 Dresden Germany
| | - Fabien Wauquier
- INRA, UMR 1019, UNH, CRNH Auvergne F‐63009 Clermont‐Ferrand France
- Université d'Auvergne, Unité de Nutrition HumaineClermont Université BP 10448 F‐63000 Clermont‐Ferrand France
| | - Gael Y. Rochefort
- Faculté de Chirurgie Dentaire, Paris Descartes, EA2496, Laboratoires PathologiesImagerie et Biothérapies orofaciales 1 rue Maurice Arnoux 92120 Montrouge France
| | - Jérôme Guicheux
- Inserm, UMR 1229, RMeSRegenerative Medicine and SkeletonUniversité de Nantes, Oniris Nantes, F‐44042 France
- UFR OdontologieUniversité de Nantes Nantes, F‐44042, France
- CHU Nantes, PHU4 OTONNNantes, F‐44093, France
| | - Edouard Jallot
- CNRS/IN2P3, Laboratoire de Physique de ClermontUniversité Clermont Auvergne BP 10448 F‐63000 Clermont‐Ferrand France
| | - Jonathan Lao
- CNRS/IN2P3, Laboratoire de Physique de ClermontUniversité Clermont Auvergne BP 10448 F‐63000 Clermont‐Ferrand France
| | - Yohann Wittrant
- INRA, UMR 1019, UNH, CRNH Auvergne F‐63009 Clermont‐Ferrand France
- Université d'Auvergne, Unité de Nutrition HumaineClermont Université BP 10448 F‐63000 Clermont‐Ferrand France
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Romero-Gavilán F, Araújo-Gomes N, Cerqueira A, García-Arnáez I, Martínez-Ramos C, Azkargorta M, Iloro I, Elortza F, Gurruchaga M, Suay J, Goñi I. Proteomic analysis of calcium-enriched sol-gel biomaterials. J Biol Inorg Chem 2019; 24:563-574. [PMID: 31030324 DOI: 10.1007/s00775-019-01662-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 04/15/2019] [Indexed: 01/05/2023]
Abstract
Calcium is an element widely used in the development of biomaterials for bone tissue engineering as it plays important roles in bone metabolism and blood coagulation. The Ca ions can condition the microenvironment at the tissue-material interface, affecting the protein deposition process and cell responses. The aim of this study was to analyze the changes in the patterns of protein adsorption on the silica hybrid biomaterials supplemented with different amounts of CaCl2, which can function as release vehicles. This characterization was carried out by incubating the Ca-biomaterials with human serum. LC-MS/MS analysis was used to characterize the adsorbed protein layers and compile a list of proteins whose affinity for the surfaces might depend on the CaCl2 content. The attachment of pro- and anti-clotting proteins, such as THRB, ANT3, and PROC, increased significantly on the Ca-materials. Similarly, VTNC and APOE, proteins directly involved on osteogenic processes, attached preferentially to these surfaces. To assess correlations with the proteomic data, these formulations were tested in vitro regarding their osteogenic and inflammatory potential, employing MC3T3-E1 and RAW 264.7 cell lines, respectively. The results confirmed a Ca dose-dependent osteogenic and inflammatory behavior of the materials employed, in accordance with the protein attachment patterns.
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Affiliation(s)
- F Romero-Gavilán
- Departamento de Ingeniería de Sistemas Industriales y Diseño, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, 12071, Castellón de la Plana, Spain
| | - Nuno Araújo-Gomes
- Departamento de Ingeniería de Sistemas Industriales y Diseño, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, 12071, Castellón de la Plana, Spain.
- Department of Medicine, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, 12071, Castellón de la Plana, Spain.
| | - A Cerqueira
- Department of Medicine, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, 12071, Castellón de la Plana, Spain
| | - I García-Arnáez
- Facultad de Ciencias Químicas, Universidad del País Vasco., P. M. de Lardizábal, 3, 20018, San Sebastián, Spain
| | - C Martínez-Ramos
- Department of Medicine, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, 12071, Castellón de la Plana, Spain
| | - M Azkargorta
- Proteomics Platform, CIC bioGUNE, CIBERehd, ProteoRed-ISCIII, Bizkaia Science and Technology Park, 48160, Derio, Spain
| | - I Iloro
- Proteomics Platform, CIC bioGUNE, CIBERehd, ProteoRed-ISCIII, Bizkaia Science and Technology Park, 48160, Derio, Spain
| | - F Elortza
- Proteomics Platform, CIC bioGUNE, CIBERehd, ProteoRed-ISCIII, Bizkaia Science and Technology Park, 48160, Derio, Spain
| | - M Gurruchaga
- Facultad de Ciencias Químicas, Universidad del País Vasco., P. M. de Lardizábal, 3, 20018, San Sebastián, Spain
| | - J Suay
- Departamento de Ingeniería de Sistemas Industriales y Diseño, Universitat Jaume I, Av. Vicent-Sos Baynat s/n, 12071, Castellón de la Plana, Spain
| | - I Goñi
- Facultad de Ciencias Químicas, Universidad del País Vasco., P. M. de Lardizábal, 3, 20018, San Sebastián, Spain
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Silicon-Substituted Hydroxyapatite Particles and Response of Adipose Stem Cells In Vitro. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2019. [DOI: 10.1007/s40883-019-00108-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Gong J, Sun M, Wang S, He J, Wang Y, Qian Y, Liu Y, Dong L, Ma L, Cheng K, Weng W, Yu M, Zhang YS, Wang H. Surface Modification by Divalent Main-Group-Elemental Ions for Improved Bone Remodeling To Instruct Implant Biofabrication. ACS Biomater Sci Eng 2019; 5:3311-3324. [PMID: 33405574 DOI: 10.1021/acsbiomaterials.9b00270] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Jiaxing Gong
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, 395 Yanan Road, Hangzhou 310003, China
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, 65 Landsdowne Street, Cambridge, Massachusetts 02139, United States
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, 268 Kaixuan Road, Hangzhou 310029, China
| | - Miao Sun
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, 395 Yanan Road, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, 268 Kaixuan Road, Hangzhou 310029, China
| | - Shaolong Wang
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, 395 Yanan Road, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, 268 Kaixuan Road, Hangzhou 310029, China
| | - Jianxiang He
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, 395 Yanan Road, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, 268 Kaixuan Road, Hangzhou 310029, China
| | - Yu Wang
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, 395 Yanan Road, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, 268 Kaixuan Road, Hangzhou 310029, China
| | - Ying Qian
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, 395 Yanan Road, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, 268 Kaixuan Road, Hangzhou 310029, China
| | - Yu Liu
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, 395 Yanan Road, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, 268 Kaixuan Road, Hangzhou 310029, China
| | - Lingqing Dong
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, 395 Yanan Road, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, 268 Kaixuan Road, Hangzhou 310029, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Liang Ma
- State Key Laboratory of Fluid Power & Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Kui Cheng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Wenjian Weng
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Mengfei Yu
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, 395 Yanan Road, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, 268 Kaixuan Road, Hangzhou 310029, China
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, 65 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Huiming Wang
- The Affiliated Stomatologic Hospital, School of Medicine, Zhejiang University, 395 Yanan Road, Hangzhou 310003, China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, 268 Kaixuan Road, Hangzhou 310029, China
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Kesse X, Vichery C, Nedelec JM. Deeper Insights into a Bioactive Glass Nanoparticle Synthesis Protocol To Control Its Morphology, Dispersibility, and Composition. ACS OMEGA 2019; 4:5768-5775. [PMID: 31459729 PMCID: PMC6648633 DOI: 10.1021/acsomega.8b03598] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 01/31/2019] [Indexed: 06/10/2023]
Abstract
The aim of this study was to investigate the effect of three synthesis parameters on the morphology and composition of nanosized binary bioactive glass particles (nBGPs) obtained through a modified Stöber process. Syntheses were conducted by varying only one parameter at a time while keeping the other parameters constant. As already mentioned in the literature, the ammonium hydroxide volume conditioned the size of the nanoparticles. Nonagglomerated monodispersed spherical particles with a diameter between 70 and 452 nm were produced. The quantity of calcium nitrate and the moment it was introduced in the sol had a tremendous impact on the quantity of calcium inserted and on the particle morphology and aggregation state. High Ca-content particles were obtained when the calcium precursor addition time was 1 h or less after the beginning of the sol-gel reaction but at the cost of a strong aggregation. A better control on the morphology, polydispersity and dispersibility of the nBGPs was achieved when the Ca(NO3)2 addition time was increased up to 6 h. However, a significant decrease of the quantity of Ca2+ inserted was also noticed. Using an intermediate (3 h) addition time, the quantity of calcium nitrate has been optimized to maximize the insertion of Ca2+ ions inside the silica particles. Finally, an optimum initial Ca/Si atomic ratio of 2, maximizing Ca insertion while limiting the salt quantity used, was found. It led to the synthesis of particles with a molar composition of 0.9SiO2-0.1CaO without any side effect on the particle stability and morphological characteristics.
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Affiliation(s)
- Xavier Kesse
- Université Clermont Auvergne,
CNRS, SIGMA Clermont, ICCF, F-63000 Clermont-Ferrand, France
| | - Charlotte Vichery
- Université Clermont Auvergne,
CNRS, SIGMA Clermont, ICCF, F-63000 Clermont-Ferrand, France
| | - Jean-Marie Nedelec
- Université Clermont Auvergne,
CNRS, SIGMA Clermont, ICCF, F-63000 Clermont-Ferrand, France
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Forman TE, Niemi AK, Prahalad P, Shi RZ, Nally LM. Cinacalcet therapy in an infant with an R185Q calcium-sensing receptor mutation causing hyperparathyroidism: a case report and review of the literature. J Pediatr Endocrinol Metab 2019; 32:305-310. [PMID: 30730839 DOI: 10.1515/jpem-2018-0307] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 11/27/2018] [Indexed: 12/27/2022]
Abstract
Background Neonatal severe hyperparathyroidism (NSHPT) is commonly treated with either parathyroidectomy or pharmacologic agents with varying efficacy and numerous side effects. Reports of using cinacalcet for NSHPT have increased, however, the effective dose for pediatric patients from the onset of symptoms through infancy has not been established. Case presentation We describe the clinical course of a newborn with a de novo R185Q mutation in the calcium-sensing receptor (CASR) gene, causing NSHPT. The infant received cinacalcet from the first days of life until 1 year of age. Conclusions Cinacalcet therapy effectively controlled the patient's serum calcium, phosphorus, and parathyroid hormone (PTH) levels without side effects.
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Affiliation(s)
- Thomas E Forman
- Department of Anesthesiology, Perioperative, and Pain Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Anna-Kaisa Niemi
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Priya Prahalad
- Department of Pediatrics, Division of Pediatric Endocrinology, Stanford University School of Medicine, Stanford, CA, USA
| | - Run Zhang Shi
- Department of Pathology, Stanford University, Stanford, CA, USA
| | - Laura M Nally
- Department of Pediatrics, Division of Pediatric Endocrinology, Stanford University School of Medicine, Stanford, CA, USA.,Department of Pediatrics, Division of Pediatric Endocrinology, Yale School of Medicine, 333 Cedar Street, LMP 3103E, P.O. Box 208064, New Haven, CT 06520, USA, Phone: 203-785-5809, Fax: 203-764-9149
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Lee S, Matsugaki A, Kasuga T, Nakano T. Development of bifunctional oriented bioactive glass/poly(lactic acid) composite scaffolds to control osteoblast alignment and proliferation. J Biomed Mater Res A 2019; 107:1031-1041. [PMID: 30675975 PMCID: PMC6593822 DOI: 10.1002/jbm.a.36619] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/12/2018] [Accepted: 11/06/2018] [Indexed: 01/27/2023]
Abstract
During the bone regeneration process, the anisotropic microstructure of bone tissue (bone quality) recovers much later than bone mass (bone quantity), resulting in severe mechanical dysfunction in the bone. Hence, restoration of bone microstructure in parallel with bone mass is necessary for ideal bone tissue regeneration; for this, development of advanced bifunctional biomaterials, which control both the quality and quantity in regenerated bone, is required. We developed novel oriented bioactive glass/poly(lactic acid) composite scaffolds by introducing an effective methodology for controlling cell alignment and proliferation, which play important roles for achieving bone anisotropy and bone mass, respectively. Our strategy is to manipulate the cell alignment and proliferation by the morphological control of the scaffolds in combination with controlled ion release from bioactive glasses. We quantitatively controlled the morphology of fibermats containing bioactive glasses by electrospinning, which successfully induced cell alignment along the fibermats. Also, the substitution of CaO in Bioglass®(45S5) with MgO and SrO improved osteoblast proliferation, indicating that dissolved Mg2+ and Sr2+ ions promoted cell adhesion and proliferation. Our results indicate that the fibermats developed in this work are candidates for the scaffolds to bone tissue regeneration that enable recovery of both bone quality and bone quantity. © 2019 The Authors. journal Of Biomedical Materials Research Part A Published By Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1031–1041, 2019.
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Affiliation(s)
- Sungho Lee
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Aira Matsugaki
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Toshihiro Kasuga
- Division of Advanced Ceramics, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya, Japan
| | - Takayoshi Nakano
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
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In situ preparation of multicomponent polymer composite nanofibrous scaffolds with enhanced osteogenic and angiogenic activities. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 94:565-579. [DOI: 10.1016/j.msec.2018.09.055] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 07/07/2018] [Accepted: 09/20/2018] [Indexed: 12/19/2022]
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Liu Q, Wang Z, Dong X, Wang H, Lan J. Calcium, Phosphorus and Oxygen Around Implant at Early Osseointegration in Hyperlipidemic Rats. J HARD TISSUE BIOL 2019. [DOI: 10.2485/jhtb.28.57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Qibo Liu
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University
- Department of Prosthodontics, School of Stomotology, Shandong University
| | - Zhifeng Wang
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University
- Department of Pediatric Dentistry, School of Stomotology, Shandong University
| | - Xiaofei Dong
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei- MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University
| | - Hui Wang
- Department of Dental Implantology, Affiliated Stomological Hospital of Suzhou University
| | - Jing Lan
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University
- Department of Prosthodontics, School of Stomotology, Shandong University
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Kruppke B, Heinemann C, Wagner AS, Farack J, Wenisch S, Wiesmann HP, Hanke T. Strontium ions promote in vitro human bone marrow stromal cell proliferation and differentiation in calcium-lacking media. Dev Growth Differ 2018; 61:166-175. [PMID: 30585307 DOI: 10.1111/dgd.12588] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 01/07/2023]
Abstract
In order to investigate the influence of calcium and strontium ion concentration on human bone marrow stromal cells and their differentiation to osteoblasts, different cell culture media have been used. Even though this study does not contain a bone substitute material, the reason for this study was the decrease of cation concentration by many biomaterials, due to induced apatite precipitation. As a consequence, the reduced calcium ion concentration is known to affect osteoblastic development. Therefore, the main focus was put on the question, whether an increased strontium concentration (in the range of mM) might be suitable to compensate the lack of calcium ions. The effect of solely strontium ions-with only calcium in the media resulting from fetal calf serum-was investigated. Commercially available calcium-free medium (modified α-MEM) was tested in comparison with media with varied calcium ion concentrations (0.9, 1.8, and 3.6 mM), or strontium ion concentration (0.4, 0.9, 1.8, and 3.6 mM). In case of calcium, higher concentrations cause increased proliferation, while differentiation was shifted to earlier points of time. Differentiation was increased by solely strontium ions only at 0.4-0.9 mM, while proliferation was highest for 0.9-1.8 mM. From these results, it can be concluded that strontium is able to compensate a lack of calcium to a certain degree. Thus, in contrast to calcium ion release, a strontium ion release from bone substitute materials might be applicable for stimulation of bone regeneration without influencing the media saturation.
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Affiliation(s)
- Benjamin Kruppke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Dresden, Germany
| | - Christiane Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Dresden, Germany
| | - Alena-Svenja Wagner
- Clinic of Small Animals, c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Gießen, Gießen, Germany.,Institute of Veterinary Physiology and Biochemistry, Justus-Liebig-University Gießen, Gießen, Germany
| | - Jana Farack
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Dresden, Germany
| | - Sabine Wenisch
- Clinic of Small Animals, c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Gießen, Gießen, Germany
| | - Hans-Peter Wiesmann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Dresden, Germany
| | - Thomas Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Dresden, Germany
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Lee MN, Hwang HS, Oh SH, Roshanzadeh A, Kim JW, Song JH, Kim ES, Koh JT. Elevated extracellular calcium ions promote proliferation and migration of mesenchymal stem cells via increasing osteopontin expression. Exp Mol Med 2018; 50:1-16. [PMID: 30393382 PMCID: PMC6215840 DOI: 10.1038/s12276-018-0170-6] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 05/30/2018] [Accepted: 07/12/2018] [Indexed: 02/06/2023] Open
Abstract
Supplementation of mesenchymal stem cells (MSCs) at sites of bone resorption is required for bone homeostasis because of the non-proliferation and short lifespan properties of the osteoblasts. Calcium ions (Ca2+) are released from the bone surfaces during osteoclast-mediated bone resorption. However, how elevated extracellular Ca2+ concentrations would alter MSCs behavior in the proximal sites of bone resorption is largely unknown. In this study, we investigated the effect of extracellular Ca2+ on MSCs phenotype depending on Ca2+ concentrations. We found that the elevated extracellular Ca2+ promoted cell proliferation and matrix mineralization of MSCs. In addition, MSCs induced the expression and secretion of osteopontin (OPN), which enhanced MSCs migration under the elevated extracellular Ca2+ conditions. We developed in vitro osteoclast-mediated bone resorption conditions using mouse calvaria bone slices and demonstrated Ca2+ is released from bone resorption surfaces. We also showed that the MSCs phenotype, including cell proliferation and migration, changed when the cells were treated with a bone resorption-conditioned medium. These findings suggest that the dynamic changes in Ca2+ concentrations in the microenvironments of bone remodeling surfaces modulate MSCs phenotype and thereby contribute to bone regeneration.
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Affiliation(s)
- Mi Nam Lee
- Research Center for Biomineralization Disorders, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Hee-Su Hwang
- Research Center for Biomineralization Disorders, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Sin-Hye Oh
- Research Center for Biomineralization Disorders, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Amir Roshanzadeh
- School of Biological Sciences and Biotechnology, Chonnam National University, Gwangju, Republic of Korea
| | - Jung-Woo Kim
- Research Center for Biomineralization Disorders, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Ju Han Song
- Research Center for Biomineralization Disorders, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Eung-Sam Kim
- Department of Biological Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Jeong-Tae Koh
- Research Center for Biomineralization Disorders, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.
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Whitely M, Cereceres S, Dhavalikar P, Salhadar K, Wilems T, Smith B, Mikos A, Cosgriff-Hernandez E. Improved in situ seeding of 3D printed scaffolds using cell-releasing hydrogels. Biomaterials 2018; 185:194-204. [PMID: 30245387 DOI: 10.1016/j.biomaterials.2018.09.027] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 09/11/2018] [Accepted: 09/16/2018] [Indexed: 12/31/2022]
Abstract
The design of tissue engineered scaffolds based on polymerized high internal phase emulsions (polyHIPEs) has emerged as a promising bone grafting strategy. We previously reported the ability to 3D print emulsion inks to better mimic the structure and mechanical properties of native bone while precisely matching defect geometry. In the current study, redox-initiated hydrogel carriers were investigated for in situ delivery of human mesenchymal stem cells (hMSCs) utilizing the biodegradable macromer, poly(ethylene glycol)-dithiothreitol. Hydrogel carrier properties including network formation time, sol-gel fraction, and swelling ratio were modulated to achieve rapid cure without external stimuli and a target cell-release period of 5-7 days. These in situ carriers enabled improved distribution of hMSCs in 3D printed polyHIPE grafts over standard suspension seeding. Additionally, carrier-loaded polyHIPEs supported sustained cell viability and osteogenic differentiation of hMSCs post-release. In summary, these findings demonstrate the potential of this in situ curing hydrogel carrier to enhance the cell distribution and retention of hMSCs in bone grafts. Although initially focused on improving bone regeneration, the ability to encapsulate cells in a hydrogel carrier without relying on external stimuli that can be attenuated in large grafts or tissues is expected to have a wide range of applications in tissue engineering.
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Affiliation(s)
- Michael Whitely
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA.
| | - Stacy Cereceres
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA.
| | - Prachi Dhavalikar
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, 78712, USA.
| | - Karim Salhadar
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, 78712, USA.
| | - Thomas Wilems
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, 78712, USA.
| | - Brandon Smith
- Department of Bioengineering, Rice University, Houston, TX, 77005, USA.
| | - Antonios Mikos
- Department of Bioengineering, Rice University, Houston, TX, 77005, USA.
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Effect of calcium ions on peptide adsorption at the aqueous rutile titania (110) interface. Biointerphases 2018; 13:06D403. [PMID: 30180596 DOI: 10.1116/1.5046531] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
How the presence of Ca2+ ions at the aqueous TiO2 interface influences the binding modes of two experimentally identified titania-binding peptides, Ti-1 and Ti-2, is investigated using replica exchange with solute tempering molecular dynamics simulations. The findings are compared with available experimental data, and the results are contrasted with those obtained under NaCl solution conditions. For Ti-1, Ca2+ ions enhance the adsorption of the negatively charged Asp8 residue in this sequence to the negatively charged surface, via Asp–Ca2+–TiO2 bridging. This appears to generate a nonlocal impact on the adsorption of Lys12 in Ti-1, which then pins the peptide to the surface via direct surface contact. For Ti-2, fewer residues were predicted to adsorb directly to the surface in CaCl2, compared with predictions made for NaCl solution, possibly due to competition between the other peptide residues and Ca2+ ions to adsorb to the surface. This reduction in direct surface contact gives rise to a more extensive solvent-mediated contact for Ti-2. In general, the presence of Ca2+ ions resulted in a loss of conformational diversity of the surface-adsorbed conformational ensembles of these peptides, compared to counterpart data predicted for NaCl solution. The findings provide initial insights into how peptide–TiO2 interactions might be tuned at the molecular level via modification of the salt composition of the liquid medium.
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Yu Q, Wang C, Yang J, Guo C, Zhang S. Mineralized collagen/Mg-Ca alloy combined scaffolds with improved biocompatibility for enhanced bone response following tooth extraction. ACTA ACUST UNITED AC 2018; 13:065008. [PMID: 30122665 DOI: 10.1088/1748-605x/aadb47] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Mineralized collagen has been used clinically as a bone grafting material in oral applications. We have developed a mineralized collagen/Mg-Ca alloy combined scaffold to overcome the mechanical limitations of mineralized collagen. This study discusses the cytocompatibility of the mineralized collage/Mg-Ca alloy combined scaffold in vitro and the bone regeneration following tooth extraction in vivo. Using an indirect proliferation assay adapted from ISO 10993-5, it was found that mineralized collagen/Mg-Ca alloy combined scaffold enhanced cell proliferation and migration in addition to MC3T3-E1 cells not showing a cytotoxicity response in vitro. Finally, the ability of the combined scaffold to enhance osteogenesis was assessed in a canine socket preservation model. Cone beam CT, x-ray microscopes and biomechanical analysis showed the mineralized collagen/Mg-Ca alloy combined scaffold to be more effective at reducing the absorption of alveolar ridge and preserving the socket site than mineralized collagen alone. The combined scaffolds can promote bone regeneration with good biocompatibility, providing a new concept of the combined application of mineralized collagen and magnesium alloy.
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Affiliation(s)
- Qing Yu
- Department of Prosthodontics, The Second Affiliated Hospital of Jinzhou Medical University, Jinzhou, People's Republic of China
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Souza L, Lopes JH, Encarnação D, Mazali IO, Martin RA, Camilli JA, Bertran CA. Comprehensive in vitro and in vivo studies of novel melt-derived Nb-substituted 45S5 bioglass reveal its enhanced bioactive properties for bone healing. Sci Rep 2018; 8:12808. [PMID: 30143690 PMCID: PMC6109119 DOI: 10.1038/s41598-018-31114-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 08/02/2018] [Indexed: 12/15/2022] Open
Abstract
The present work presents and discusses the results of a comprehensive study on the bioactive properties of Nb-substituted silicate glass derived from 45S5 bioglass. In vitro and in vivo experiments were performed. We undertook three different types of in vitro analyses: (i) investigation of the kinetics of chemical reactivity and the bioactivity of Nb-substituted glass in simulated body fluid (SBF) by 31P MASNMR spectroscopy, (ii) determination of ionic leaching profiles in buffered solution by inductively coupled plasma optical emission spectrometry (ICP-OES), and (iii) assessment of the compatibility and osteogenic differentiation of human embryonic stem cells (hESCs) treated with dissolution products of different compositions of Nb-substituted glass. The results revealed that Nb-substituted glass is not toxic to hESCs. Moreover, adding up to 1.3 mol% of Nb2O5 to 45S5 bioglass significantly enhanced its osteogenic capacity. For the in vivo experiments, trial glass rods were implanted into circular defects in rat tibia in order to evaluate their biocompatibility and bioactivity. Results showed all Nb-containing glass was biocompatible and that the addition of 1.3 mol% of Nb2O5, replacing phosphorous, increases the osteostimulation of bioglass. Therefore, these results support the assertion that Nb-substituted glass is suitable for biomedical applications.
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Affiliation(s)
- Lucas Souza
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas - UNICAMP, 13083-862, Campinas, SP, Brazil
| | - João Henrique Lopes
- Department of Physical Chemistry, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970, Campinas, SP, Brazil.
| | - Davi Encarnação
- Department of Physical Chemistry, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970, Campinas, SP, Brazil
| | - Italo Odone Mazali
- Laboratory of Functional Materials, Department of Inorganic Chemistry, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970, Campinas, SP, Brazil
| | - Richard Alan Martin
- School of Engineering & Aston Research Centre for Healthy Ageing, Aston University, B47ET, Birmingham, United Kingdom
| | - José Angelo Camilli
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas - UNICAMP, 13083-862, Campinas, SP, Brazil
| | - Celso Aparecido Bertran
- Department of Physical Chemistry, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970, Campinas, SP, Brazil
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Ferraretto A, Bottani M, Villa I, Giusto L, Signo M, Senesi P, Montesano A, Vacante F, Luzi L, Rubinacci A, Terruzzi I. L-Carnitine activates calcium signaling in human osteoblasts. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.05.068] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Guyet A, Dade-Robertson M, Wipat A, Casement J, Smith W, Mitrani H, Zhang M. Mild hydrostatic pressure triggers oxidative responses in Escherichia coli. PLoS One 2018; 13:e0200660. [PMID: 30016375 PMCID: PMC6049941 DOI: 10.1371/journal.pone.0200660] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 06/30/2018] [Indexed: 11/24/2022] Open
Abstract
Hydrostatic pressure is an important physical stimulus which can cause various responses in bacterial cells. The survival and cellular processes of Escherichia coli under hydrostatic pressures between 10 MPa and 110 MPa have been studied. However, understanding bacterial responses to moderately elevated pressure of up to 10 MPa is useful for a range of different applications including for example in smart and responsive materials. In this study, the genetic responses of E. coli K-12 MG1655 to 1 MPa pressure was examined using transcriptomic analysis by RNA-Seq. The results show that 101 genes were differentially expressed under 1 MPa pressure in E. coli cells, with 85 of them up-regulated. The analysis suggested that some genes were over expressed to adapt the increase of oxygen levels in our system, and several functional categories are involved including oxidative stress responses, Fe-S cluster assembly and iron acquisition. Two differentially expressed genes azuC and entC were further investigated using RT-qPCR, and GFP reported strains of those two genes were created, AG1319 (PazuCazuC-msfgfp) and AG1321 (PentCentC-msfgfp). A linear response of azuC expression was observed between 0 MPa to 1 MPa by monitoring the fluorescence signal of strain AG1319 (PazuCazuC-msfgfp). This study is the first report to demonstrate the genetic response of bacterial cells under 1 MPa hydrostatic pressure, and provides preliminary data for creating pressure sensing bacterial strains for a wide range of applications.
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Affiliation(s)
- Aurelie Guyet
- The Centre for Bacterial Cell Biology, Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Martyn Dade-Robertson
- School of Computing, Newcastle University, Newcastle upon Tyne, United Kingdom
- School of Architecture Planning and Landscape, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Anil Wipat
- School of Computing, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - John Casement
- Bioinformatics Support Unit, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Wendy Smith
- School of Computing, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Helen Mitrani
- School of Engineering, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Meng Zhang
- Department of Applied Sciences, Northumbria University, Newcastle upon Tyne, United Kingdom
- * E-mail:
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Setyani DS, Qibtiyah M, Asmaningsih N, Yulistiani Y. Analysis of High Dose and Long-Term Prednisone Therapy on Trap 5B Level Change in Children with Steroid Sensitive Nephrotic Syndrome. FOLIA MEDICA INDONESIANA 2018. [DOI: 10.20473/fmi.v54i2.8861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Nephrotic syndrome is a condition which is characterized by protein leakage from the blood to the urine through glomeruli. It leads to hypoproteinemia and generalised oedema. Patients with nephrotic syndrome need high dose and long term glucocorticoid such as prednisone. High dose and long term glucocorticoid can increase bone resorption. Biological marker is a valuable tool to evaluate efficacy of therapy. TRAP 5B is a sensitive biological marker for bone resorption because it reflects the number of osteoclasts. TRAP 5B is not affected by renal dysfunction and food. It also has a low diurnal variation than other bone resorption marker. The aim of this study was to analyze the changes of TRAP 5B levels at induction and alternate phase in children with steroid sensitive nephrotic syndrome. This observational prospective study was conducted from May to October 2016. Venous blood samples obtained at 08.00-10.00 am. TRAP5B levels were measured before and after induction phase and after alternate phase using ELISA. Fifteen patients were included in this study (60% boys). Majority of their age was 6 - <12 years and 40% were dependent steroid NS. TRAP 5B serum levels in induction phase increased by 37.41%±56.22%. In alternate phase, TRAP 5B serum levels increased by 28.75%±66.55% compared to the induction phase. However, the level change of both phases were not significant. As a conclusion, TRAP 5B levels increased in induction and alternate phase after high dose and long-term prednisone treatment in nephrotic syndrome.
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Kuczera P, Adamczak M, Machnik G, Okopien B, Wiecek A. Treatment Based on Cinacalcet Reduces Oxidative Stress in Hemodialysis Patients with Secondary Hyperparathyroidism. Nephron Clin Pract 2018; 139:286-292. [PMID: 29879701 DOI: 10.1159/000489278] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Accepted: 04/13/2018] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND/AIMS Oxidative stress is one of the leading factors contributing to increased mortality in patients with chronic kidney disease (CKD) and secondary hyperparathyroidism (sHPT). Cinacalcet is now commonly used in the treatment of sHPT in patients with CKD. The aim of this study was to assess the influence of treatment with cinacalcet on the oxidative stress markers in patients on hemodialysis with sHPT. METHODS In 58 hemodialysed patients with sHPT (parathyroid hormone [PTH] > 300 pg/mL) plasma Advanced Oxidation Protein Products (AOPP), serum total antioxidant capacity - ImAnOx (TAS/TAC), serum PTH, calcium and phosphate concentrations were assessed before the first dose of cinacalcet and after 6 months of treatment. RESULTS Serum PTH concentration decreased significantly from 895 (748-1,070) to 384 (289-510) pg/mL after 6 months of treatment; p < 0.0001. Mean serum concentrations of -calcium and phosphate remained stable. Plasma AOPP concentration decreased significantly from 152 (126-185) to 49 -(43-57) µmol/L after 6 months of treatment; p < 0.0001. ImAnOx significantly increased from 260 (251-270) to 272 (264-280) µmol/L; p = 0.04. After 6 months of treatment, a significant, positive correlation was found between ImAnOx and the daily dose of cinacalcet (r = 0.30; p = 0.02). Also, the change of serum ImAnOx during treatment with cinacalcet significantly correlated with the daily dose of cinacalcet r = 0.35; p = 0.01. No significant correlations were found between plasma AOPP concentration or ImAnOx and PTH, or their changes in time. CONCLUSIONS (1) Six-month treatment based on cinacalcet seems to reduce oxidative stress markers in maintenance hemodialysis patients with sHPT. (2) This benefit may be related rather to the direct action of cinacalcet than to the serum PTH concentration decrease.
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Affiliation(s)
- Piotr Kuczera
- Department of Nephrology, Transplantation and Internal Medicine, Katowice, Poland
| | - Marcin Adamczak
- Department of Nephrology, Transplantation and Internal Medicine, Katowice, Poland
| | - Grzegorz Machnik
- Department of Internal Medicine and Clinical Pharmacology, Medical University of Silesia, Katowice, Poland
| | - Boguslaw Okopien
- Department of Internal Medicine and Clinical Pharmacology, Medical University of Silesia, Katowice, Poland
| | - Andrzej Wiecek
- Department of Nephrology, Transplantation and Internal Medicine, Katowice, Poland
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Fukagawa M, Yokoyama K, Shigematsu T, Akiba T, Fujii A, Kuramoto T, Odani M, Akizawa T. A phase 3, multicentre, randomized, double-blind, placebo-controlled, parallel-group study to evaluate the efficacy and safety of etelcalcetide (ONO-5163/AMG 416), a novel intravenous calcimimetic, for secondary hyperparathyroidism in Japanese haemodialysis patients. Nephrol Dial Transplant 2018; 32:1723-1730. [PMID: 28057872 PMCID: PMC5837215 DOI: 10.1093/ndt/gfw408] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 10/03/2016] [Indexed: 01/22/2023] Open
Abstract
Background Secondary hyperparathyroidism (SHPT) is a major complication associated with chronic kidney disease. We evaluated the efficacy and safety of etelcalcetide (ONO-5163/AMG 416), a novel intravenous calcimimetic, in Japanese haemodialysis patients with SHPT. Methods In this phase 3, multicentre, randomized, double-blind, placebo-controlled, parallel-group study, etelcalcetide was administered three times per week at an initial dose of 5 mg, and subsequently adjusted to doses between 2.5 and 15 mg at 4-week intervals for 12 weeks. A total of 155 SHPT patients with serum intact parathyroid hormone (iPTH) levels ≥300 pg/mL were assigned to receive etelcalcetide (n = 78) or placebo (n = 77). The primary endpoint was the proportion of patients with decreased serum iPTH to the target range proposed by the Japanese Society for Dialysis Therapy (60–240 pg/mL). The major secondary endpoint was the proportion of patients with ≥30% reductions in serum iPTH from baseline. Results The proportion of patients meeting the primary endpoint was significantly higher for etelcalcetide (59.0%) versus placebo (1.3%). Similarly, the proportion of patients meeting the major secondary endpoint was significantly higher for etelcalcetide (76.9%) versus placebo (5.2%). Serum albumin-corrected calcium, phosphorus and intact fibroblast growth factor-23 levels were decreased in the etelcalcetide group. Nausea, vomiting and symptomatic hypocalcaemia were mild with etelcalcetide. Serious adverse events related to etelcalcetide were not observed. Conclusions This study demonstrated the efficacy and safety of etelcalcetide. As the only available intravenous calcium-sensing receptor agonist, etelcalcetide is likely to provide a new treatment option for SHPT in haemodialysis patients.
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Affiliation(s)
- Masafumi Fukagawa
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Keitaro Yokoyama
- Division of Nephrology and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Takashi Shigematsu
- Division of Nephrology, Department of Internal Medicine, Wakayama Medical University, Wakayama, Japan
| | | | | | | | - Motoi Odani
- Data Science, Ono Pharmaceutical Co. Ltd, Osaka, Japan
| | - Tadao Akizawa
- Division of Nephrology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
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Li K, Hu D, Xie Y, Huang L, Zheng X. Sr-doped nanowire modification of Ca-Si-based coatings for improved osteogenic activities and reduced inflammatory reactions. NANOTECHNOLOGY 2018; 29:084001. [PMID: 29256438 DOI: 10.1088/1361-6528/aaa2b4] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Biomedical coatings for orthopedic implants should facilitate osseointegration and mitigate implant-induced inflammatory reactions. In our study, Ca-Si coatings with Sr-containing nanowire-like structures (NW-Sr-CS) were achieved via hydrothermal treatment. In order to identify the effect of nanowire-like topography and Sr dopant on the biological properties of Ca-Si-based coatings, the original Ca-Si coating, Ca-Si coatings modified with nanoplate (NP-CS) and similar nanowire-like structure (NW-CS) were fabricated as the control. Surface morphology, phase composition, surface area, zeta potential and ion release of these coatings were characterized. The in vitro osteogenic activities and immunomodulatory properties were evaluated with bone marrow stromal cells (BMSCs) and RAW 264.7 cells, a mouse macrophage cell line. Compared with the CS and NP-CS coatings, the NW-CS coating possessed a larger surface area and pore volume, beneficial protein adsorption, up-regulated the expression levels of integrin β1, Vinculin and focal adhesion kinase and promoted cell spreading. Furthermore, the NW-CS coating significantly enhanced the osteogenic differentiation and mineralization as indicated by the up-regulation of ALP activity, mineralized nodule formation and osteoblastogenesis-related gene expression. With the introduction of Sr, the NW-Sr-CS coatings exerted a greater effect on the BMSC proliferation rate, calcium sensitive receptor gene expression as well as PKC and ERK1/2 phosphorylation. In addition, the Sr-doped coatings significantly up-regulated the ratio of OPG/RANKL in the BMSCs. The NW-Sr-CS coatings could modulate the polarization of macrophages towards the wound-healing M2 phenotype, reduce the mRNA expression levels of pro-inflammatory cytokines (TNF-α, IL-1β, IL-6) and enhance anti-inflammatory cytokines (IL-1ra, IL-10). The Sr-doped nanowire modification may be a valuable approach to enhance osteogenic activities and reduce inflammatory reactions.
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Affiliation(s)
- Kai Li
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People's Republic of China
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Dinesh Kumar S, Mohamed Abudhahir K, Selvamurugan N, Vimalraj S, Murugesan R, Srinivasan N, Moorthi A. Formulation and biological actions of nano-bioglass ceramic particles doped with Calcarea phosphorica for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 83:202-209. [DOI: 10.1016/j.msec.2017.08.077] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 07/24/2017] [Accepted: 08/18/2017] [Indexed: 12/20/2022]
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75
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Marie PJ, Cohen-Solal M. The Expanding Life and Functions of Osteogenic Cells: From Simple Bone-Making Cells to Multifunctional Cells and Beyond. J Bone Miner Res 2018; 33:199-210. [PMID: 29206311 DOI: 10.1002/jbmr.3356] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 11/27/2017] [Accepted: 11/29/2017] [Indexed: 12/20/2022]
Abstract
During the last three decades, important progress in bone cell biology and in human and mouse genetics led to major advances in our understanding of the life and functions of cells of the osteoblast lineage. Previously unrecognized sources of osteogenic cells have been identified. Novel cellular and molecular mechanisms controlling osteoblast differentiation and senescence have been determined. New mechanisms of communications between osteogenic cells, osteocytes, osteoclasts, and chondrocytes, as well as novel links between osteogenic cells and blood vessels have been identified. Additionally, cells of the osteoblast lineage were shown to be important components of the hematopoietic niche and to be implicated in hematologic dysfunctions and malignancy. Lastly, unexpected interactions were found between osteogenic cells and several soft tissues, including the central nervous system, gut, muscle, fat, and testis through the release of paracrine factors, making osteogenic cells multifunctional regulatory cells, in addition to their bone-making function. These discoveries considerably enlarged our vision of the life and functions of osteogenic cells, which may lead to the development of novel therapeutics with immediate applications in bone disorders. © 2017 American Society for Bone and Mineral Research.
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Affiliation(s)
- Pierre J Marie
- Inserm UMR-1132, Paris, France.,University Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Martine Cohen-Solal
- Inserm UMR-1132, Paris, France.,University Paris Diderot, Sorbonne Paris Cité, Paris, France
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76
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Zeng D, Zhang X, Wang X, Cao L, Zheng A, Du J, Li Y, Huang Q, Jiang X. Fabrication of large-pore mesoporous Ca-Si-based bioceramics for bone regeneration. Int J Nanomedicine 2017; 12:8277-8287. [PMID: 29180865 PMCID: PMC5695511 DOI: 10.2147/ijn.s144528] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Our previous study revealed that mesoporous Ca-Si-based materials exhibited excellent osteoconduction because dissolved ions could form a layer of hydroxycarbonate apatite on the surface of the materials. However, the biological mechanisms underlying bone regeneration were largely unknown. The main aim of this study was to evaluate the osteogenic ability of large-pore mesoporous Ca-Si-based bioceramics (LPMSCs) by alkaline phosphatase assay, real-time PCR analysis, von Kossa, and alizarin red assay. Compared with large-pore mesoporous silica (LPMS), LPMSCs had a better effect on the osteogenic differentiation of dental pulp cells. LPMSC-2 and LPMSC-3 with higher calcium possessed better osteogenic abilities than LPMSC-1, which may be related to the calcium-sensing receptor pathway. Furthermore, the loading capacity for recombinant human platelet-derived growth factor-BB was satisfactory in LPMSCs. In vivo, the areas of new bone formation in the calvarial defect repair were increased in the LPMSC-2 and LPMSC-3 groups compared with the LPMSC-1 and LPMS groups. We concluded that LPMSC-2 and LPMSC-3 possessed both excellent osteogenic abilities and satisfactory loading capacities, which may be attributed to their moderate Ca/Si molar ratio. Therefore, LPMSCs with moderate Ca/Si molar ratio might be potential alterative grafts for craniomaxillofacial bone regeneration.
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Affiliation(s)
- Deliang Zeng
- Department of Prosthodontics, School of Medicine, Ninth People’s Hospital affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
- Oral Bioengineering Laboratory, Shanghai Research Institute of Stomatology, School of Medicine, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
| | - Xingdi Zhang
- Laboratory of Low-Dimensional Materials Chemistry, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, People’s Republic of China
| | - Xiao Wang
- Department of Prosthodontics, School of Medicine, Ninth People’s Hospital affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
- Oral Bioengineering Laboratory, Shanghai Research Institute of Stomatology, School of Medicine, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
| | - Lingyan Cao
- Department of Prosthodontics, School of Medicine, Ninth People’s Hospital affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
| | - Ao Zheng
- Department of Prosthodontics, School of Medicine, Ninth People’s Hospital affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
- Oral Bioengineering Laboratory, Shanghai Research Institute of Stomatology, School of Medicine, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
| | - Jiahui Du
- Department of Prosthodontics, School of Medicine, Ninth People’s Hospital affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
- Oral Bioengineering Laboratory, Shanghai Research Institute of Stomatology, School of Medicine, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
| | - Yongsheng Li
- Laboratory of Low-Dimensional Materials Chemistry, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, People’s Republic of China
| | - Qingfeng Huang
- Department of Prosthodontics, School of Medicine, Ninth People’s Hospital affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
| | - Xinquan Jiang
- Department of Prosthodontics, School of Medicine, Ninth People’s Hospital affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
- Oral Bioengineering Laboratory, Shanghai Research Institute of Stomatology, School of Medicine, Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, People’s Republic of China
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77
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Diepenhorst N, Rueda P, Cook AE, Pastoureau P, Sabatini M, Langmead CJ. G protein-coupled receptors as anabolic drug targets in osteoporosis. Pharmacol Ther 2017; 184:1-12. [PMID: 29080701 DOI: 10.1016/j.pharmthera.2017.10.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Osteoporosis is a progressive bone disorder characterised by imbalance between bone building (anabolism) and resorption (catabolism). Most therapeutics target inhibition of osteoclast-mediated bone resorption, but more recent attention in early drug discovery has focussed on anabolic targets in osteoblasts or their precursors. Two marketed agents that display anabolic properties, strontium ranelate and teriparatide, mediate their actions via the G protein-coupled calcium-sensing and parathyroid hormone-1 receptors, respectively. This review explores their activity, the potential for improved therapeutics targeting these receptors and other putative anabolic GPCR targets, including Smoothened, Wnt/Frizzled, relaxin family peptide, adenosine, cannabinoid, prostaglandin and sphingosine-1-phosphate receptors.
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Affiliation(s)
- Natalie Diepenhorst
- Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, VIC 3052, Australia
| | - Patricia Rueda
- Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, VIC 3052, Australia
| | - Anna E Cook
- Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, VIC 3052, Australia
| | - Philippe Pastoureau
- Therapeutic Innovation Pole of Immuno-Inflammatory Diseases, Institut de Recherches Servier, Suresnes, France
| | - Massimo Sabatini
- Therapeutic Innovation Pole of Immuno-Inflammatory Diseases, Institut de Recherches Servier, Suresnes, France
| | - Christopher J Langmead
- Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, VIC 3052, Australia.
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78
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Zhang M, Chen X, Pu X, Liao X, Huang Z, Yin G. Dissolution behavior of CaO-MgO-SiO2
-based multiphase bioceramic powders and effects of the released ions on osteogenesis. J Biomed Mater Res A 2017; 105:3159-3168. [DOI: 10.1002/jbm.a.36154] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/28/2017] [Accepted: 06/29/2017] [Indexed: 01/02/2023]
Affiliation(s)
- Mengjiao Zhang
- College of Materials Science and Engineering; Sichuan University; Chengdu 610064 People's Republic of China
| | - Xianchun Chen
- College of Materials Science and Engineering; Sichuan University; Chengdu 610064 People's Republic of China
| | - Ximing Pu
- College of Materials Science and Engineering; Sichuan University; Chengdu 610064 People's Republic of China
| | - Xiaoming Liao
- College of Materials Science and Engineering; Sichuan University; Chengdu 610064 People's Republic of China
| | - Zhongbing Huang
- College of Materials Science and Engineering; Sichuan University; Chengdu 610064 People's Republic of China
| | - Guangfu Yin
- College of Materials Science and Engineering; Sichuan University; Chengdu 610064 People's Republic of China
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79
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Zeng D, Zhang X, Wang X, Huang Q, Wen J, Miao X, Peng L, Li Y, Jiang X. The osteoimmunomodulatory properties of MBG scaffold coated with amino functional groups. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:1425-1435. [PMID: 28853299 DOI: 10.1080/21691401.2017.1369428] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Mesoporous bioactive glass (MBG) is a good scaffold for bone regeneration. In this study, amino functionalized MBG (N-MBG) was used as a model scaffold to examine the effect of the scaffold to bone marrow stromal cells (BMSCs) and macrophages. The MTT results revealed that the proliferation of BMSCs from ovariectomized rabbits was enhanced by N-MBG. Compared to the control group, the expression of osteogenic genes was significantly enhanced by N-MBG, which was related to CaSR pathway. Meanwhile, the anti-inflammatory cytokines (interleukin-10 and arginase-1) were also upregulated by N-MBG stimulation compared with MBG. Furthermore, the amino functionalization of MBG resulted in an increase in the pH value of the material extract. Interestingly, the formation of TRAP+ multinuclear cells was inhibited by the slightly alkaline extract to a certain extent, which reasonably explained the increase in TRAP+ multinuclear cells after adjusting the pH value of N-MBG extract. In vivo, the areas of new bone formation in the maxillary sinus floor elevation were increased in the N-MBG/BMSCs group with less TRAP+ multinuclear cells compared with the MBG/BMSCs group. These findings provided valuable insight that the osteogenic ability of MBG scaffold could be enhanced by amino functionalization due to coordinate BMSCs and macrophages differentiation.
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Affiliation(s)
- Deliang Zeng
- a Department of Prosthodontics , Ninth People's Hospital affiliated to Shanghai Jiao Tong University, School of Medicine , Shanghai , China.,b Oral Bioengineering Lab , Shanghai Research Institute of Stomatology, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai Key Laboratory of Stomatology , Shanghai , China
| | - Xingdi Zhang
- c Lab of Low-Dimensional Materials Chemistry , Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai , China
| | - Xiao Wang
- a Department of Prosthodontics , Ninth People's Hospital affiliated to Shanghai Jiao Tong University, School of Medicine , Shanghai , China.,b Oral Bioengineering Lab , Shanghai Research Institute of Stomatology, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai Key Laboratory of Stomatology , Shanghai , China
| | - Qingfeng Huang
- a Department of Prosthodontics , Ninth People's Hospital affiliated to Shanghai Jiao Tong University, School of Medicine , Shanghai , China
| | - Jin Wen
- a Department of Prosthodontics , Ninth People's Hospital affiliated to Shanghai Jiao Tong University, School of Medicine , Shanghai , China.,b Oral Bioengineering Lab , Shanghai Research Institute of Stomatology, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai Key Laboratory of Stomatology , Shanghai , China
| | - Xinchao Miao
- a Department of Prosthodontics , Ninth People's Hospital affiliated to Shanghai Jiao Tong University, School of Medicine , Shanghai , China.,b Oral Bioengineering Lab , Shanghai Research Institute of Stomatology, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai Key Laboratory of Stomatology , Shanghai , China
| | - Lingjie Peng
- b Oral Bioengineering Lab , Shanghai Research Institute of Stomatology, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai Key Laboratory of Stomatology , Shanghai , China
| | - Yongsheng Li
- c Lab of Low-Dimensional Materials Chemistry , Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai , China
| | - Xinquan Jiang
- a Department of Prosthodontics , Ninth People's Hospital affiliated to Shanghai Jiao Tong University, School of Medicine , Shanghai , China.,b Oral Bioengineering Lab , Shanghai Research Institute of Stomatology, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai Key Laboratory of Stomatology , Shanghai , China
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80
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Wagner AS, Glenske K, Henß A, Kruppke B, Rößler S, Hanke T, Moritz A, Rohnke M, Kressin M, Arnhold S, Schnettler R, Wenisch S. Cell behavior of human mesenchymal stromal cells in response to silica/collagen based xerogels and calcium deficient culture conditions. ACTA ACUST UNITED AC 2017; 12:045003. [PMID: 28425919 DOI: 10.1088/1748-605x/aa6e29] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Herein, we aim to elucidate osteogenic effects of two silica-based xerogels with different degrees of bioactivity on human bone-derived mesenchymal stromal cells by means of scanning electron microscopy, quantitative PCR enhanced osteogenic effects and the formation of an extracellular matrix which could be ascribed to the sample with lower bioactivity. Given the high levels of bioactivity, the cells revealed remarkable sensitivity to extremely low calcium levels of the media. Therefore, additional experiments were performed to elucidate cell behavior under calcium deficient conditions. The results refer to capacity of the bone-derived stromal cells to overcome calcium deficiency even though proliferation, migration and osteogenic differentiation capabilities were diminished. One reason for the differences of the cellular response (on tissue culture plates versus xerogels) to calcium deficiency seems to be the positive effect of silica. The silica could be detected intracellularly as shown by time of flight-secondary ion mass spectrometry after cultivation of primary cells for 21 days on the surfaces of the xerogels. Thus, the present findings refer to different osteogenic differentiation potentials of the xerogels according to the different degrees of bioactivity, and to the role of silica as a stimulator of osteogenesis. Finally, the observed pattern of connexin-based hemichannel gating supports the assumption that connexin 43 is a key factor for calcium-mediated osteogenesis in bone-derived mesenchymal stromal cells.
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Affiliation(s)
- Alena-Svenja Wagner
- Department of Veterinary Clinical Sciences, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Giessen, Giessen, Germany
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81
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Galván-Chacón VP, Habibovic P. Deconvoluting the Bioactivity of Calcium Phosphate-Based Bone Graft Substitutes: Strategies to Understand the Role of Individual Material Properties. Adv Healthc Mater 2017; 6. [PMID: 28544743 DOI: 10.1002/adhm.201601478] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/24/2017] [Indexed: 02/06/2023]
Abstract
Calcium phosphate (CaP)-based ceramics are the most widely applied synthetic biomaterials for repair and regeneration of damaged and diseased bone. CaP bioactivity is regulated by a set of largely intertwined physico-chemical and structural properties, such as the surface microstructure, surface energy, porosity, chemical composition, crystallinity and stiffness. Unravelling the role of each individual property in the interaction between the biomaterial and the biological system is a prerequisite for evolving from a trial-and-error approach to a design-driven approach in the development of new functional biomaterials. This progress report critically reviews various strategies developed to decouple the roles of the individual material properties in the biological performance of CaP ceramics. It furthermore emphasizes on the importance of a comprehensive and adequate material characterization that is needed to enhance our knowledge of the property-function relationship of biomaterials used in bone regeneration, and in regenerative medicine in general.
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Affiliation(s)
| | - Pamela Habibovic
- MERLN Institute; Maastricht University; P.O. Box 616 6200 MD Maastricht The Netherlands
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82
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Rahimnejad Yazdi A, Torkan L, Waldman SD, Towler MR. Development of a novel bioactive glass suitable for osteosarcoma‐related bone grafts. J Biomed Mater Res B Appl Biomater 2017; 106:1186-1193. [DOI: 10.1002/jbm.b.33930] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 05/08/2017] [Accepted: 05/12/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Alireza Rahimnejad Yazdi
- Department of Mechanical and Industrial EngineeringRyerson UniversityToronto OntarioM5B 2K3 Canada
- Li Ka Shing Knowledge Institute, St. Michael's HospitalToronto OntarioM5B 1W8 Canada
| | - Lawrence Torkan
- Department of Mechanical and Industrial EngineeringRyerson UniversityToronto OntarioM5B 2K3 Canada
- Faculty of ScienceUniversity of OttawaOttawa OntarioK1N 6N5 Canada
| | - Stephen D. Waldman
- Li Ka Shing Knowledge Institute, St. Michael's HospitalToronto OntarioM5B 1W8 Canada
- Department of Chemical EngineeringRyerson UniversityToronto OntarioM5B 2K3 Canada
| | - Mark R. Towler
- Department of Mechanical and Industrial EngineeringRyerson UniversityToronto OntarioM5B 2K3 Canada
- Li Ka Shing Knowledge Institute, St. Michael's HospitalToronto OntarioM5B 1W8 Canada
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83
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Shuai C, Guo W, Gao C, Yang Y, Xu Y, Liu L, Qin T, Sun H, Yang S, Feng P, Wu P. Calcium Silicate Improved Bioactivity and Mechanical Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Scaffolds. Polymers (Basel) 2017; 9:E175. [PMID: 30970854 PMCID: PMC6432408 DOI: 10.3390/polym9050175] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Revised: 05/12/2017] [Accepted: 05/12/2017] [Indexed: 12/02/2022] Open
Abstract
The poor bioactivity and mechanical properties have restricted its biomedical application, although poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) had good biocompatibility and biodegradability. In this study, calcium silicate (CS) was incorporated into PHBV for improving its bioactivity and mechanical properties, and the porous PHBV/CS composite scaffolds were fabricated via selective laser sintering (SLS). Simulated body fluid (SBF) immersion tests indicated the composite scaffolds had good apatite-forming ability, which could be mainly attributed to the electrostatic attraction of negatively charged silanol groups derived from CS degradation to positively charged calcium ions in SBF. Moreover, the compressive properties of the composite scaffolds increased at first, and then decreased with increasing the CS content, which was ascribed to the fact that CS of a proper content could homogeneously disperse in PHBV matrix, while excessive CS would form continuous phase. The compressive strength and modulus of composite scaffolds with optimal CS content of 10 wt % were 3.55 MPa and 36.54 MPa, respectively, which were increased by 41.43% and 28.61%, respectively, as compared with PHBV scaffolds. Additionally, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay indicated MG63 cells had a higher proliferation rate on PHBV/CS composite scaffolds than that on PHBV. Alkaline phosphatase (ALP) staining assay demonstrated the incorporation of CS significantly promoted osteogenic differentiation of MG63 cells on the scaffolds. These results suggest that the PHBV/CS composite scaffolds have the potential in serving as a substitute in bone tissue engineering.
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Affiliation(s)
- Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha 410008, China.
| | - Wang Guo
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Youwen Yang
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Yong Xu
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Long Liu
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Tian Qin
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Hang Sun
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Sheng Yang
- Human Reproduction Center, Shenzhen Hospital of Hongkong University, Shenzhen 518000, China.
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Ping Wu
- College of Chemistry, Xiangtan University, Xiangtan 411105, China.
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84
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No YJ, Li JJ, Zreiqat H. Doped Calcium Silicate Ceramics: A New Class of Candidates for Synthetic Bone Substitutes. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E153. [PMID: 28772513 PMCID: PMC5459133 DOI: 10.3390/ma10020153] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 01/30/2017] [Accepted: 02/04/2017] [Indexed: 02/06/2023]
Abstract
Doped calcium silicate ceramics (DCSCs) have recently gained immense interest as a new class of candidates for the treatment of bone defects. Although calcium phosphates and bioactive glasses have remained the mainstream of ceramic bone substitutes, their clinical use is limited by suboptimal mechanical properties. DCSCs are a class of calcium silicate ceramics which are developed through the ionic substitution of calcium ions, the incorporation of metal oxides into the base binary xCaO-ySiO₂ system, or a combination of both. Due to their unique compositions and ability to release bioactive ions, DCSCs exhibit enhanced mechanical and biological properties. Such characteristics offer significant advantages over existing ceramic bone substitutes, and underline the future potential of adopting DCSCs for clinical use in bone reconstruction to produce improved outcomes. This review will discuss the effects of different dopant elements and oxides on the characteristics of DCSCs for applications in bone repair, including mechanical properties, degradation and ion release characteristics, radiopacity, and biological activity (in vitro and in vivo). Recent advances in the development of DCSCs for broader clinical applications will also be discussed, including DCSC composites, coated DCSC scaffolds and DCSC-coated metal implants.
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Affiliation(s)
- Young Jung No
- Biomaterials and Tissue Engineering Research Unit, School of AMME, University of Sydney, Sydney 2006, Australia.
| | - Jiao Jiao Li
- Biomaterials and Tissue Engineering Research Unit, School of AMME, University of Sydney, Sydney 2006, Australia.
| | - Hala Zreiqat
- Biomaterials and Tissue Engineering Research Unit, School of AMME, University of Sydney, Sydney 2006, Australia.
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85
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Kitay AM, Geibel JP. Stomach and Bone. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1033:97-131. [DOI: 10.1007/978-3-319-66653-2_6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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86
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Wu T, Cheng N, Xu C, Sun W, Yu C, Shi B. The effect of mesoporous bioglass on osteogenesis and adipogenesis of osteoporotic BMSCs. J Biomed Mater Res A 2016; 104:3004-3014. [PMID: 27449696 PMCID: PMC5995467 DOI: 10.1002/jbm.a.35841] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 06/21/2016] [Accepted: 07/21/2016] [Indexed: 01/04/2023]
Abstract
This study evaluated the effect of mesoporous bioglass (MBG) dissolution on the differentiation of bone marrow mesenchymal stem cells (BMSCs) derived from either sham control or ovariectomized (OVX) rats. MBG was fabricated by evaporation-induced self-assembly method. Cell proliferation was tested by Cell Counting Kit-8 assay, and cytoskeletal morphology was observed by fluorescence microscopy. Osteogenic differentiation was evaluated by alkaline phosphatase (ALP) staining and activity, Alizarin Red staining, while adipogenic differentiation was assessed by Oil Red-O staining. Quantitative real-time PCR and Western blot analysis were taken to evaluate the expression of runt-related transcription factor 2 (Runx2) and proliferator-activated receptor-γ (PPARγ). We found that MBG dissolution (0, 25, 50, 100, 200 µg/mL) was nontoxic to BMSCs growth. Sham and OVX BMSCs exhibited the highest ALP activity in 50 µg/mL of MBG osteogenic dissolution, except that sham BMSCs in 100 µg/mL showed the highest ALP activity on day 14. Runx2 was significantly upregulated after 100 µg/mL of MBG stimulation in sham and OVX BMSCs for 7 and 14 days, except that 25 µg/mL showed highest upregulation effect on OVX BMSCs at day 7. PPARγ was downregulated after MBG stimulation. The protein level of Runx2 from the sham BMSCs group was significantly upregulated after lower doses (25 and 50 µg/mL) of MBG stimulation, whereas PPARγ was downregulated in the sham and OVX BMSCs group. Thus, both the osteogenic and adipogenic abilities of BMSCs were damaged under OVX condition. Moreover, lower concentration of MBG dissolution can promote osteogenesis but inhibit adipogenesis of the sham and OVX BMSCs. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 3004-3014, 2016.
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Affiliation(s)
- Tao Wu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, People's Republic of China
| | - Ning Cheng
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, People's Republic of China
- School of Dentistry, Oral Biology Curriculum, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, 27599
| | - Chun Xu
- Australian Institute for Bioengineering and Nanotechnology (AIBN), the University of Queensland, Brisbane, QLD, 4067, Australia
| | - Wei Sun
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, People's Republic of China
- Department of Dental Implantology, School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Chengzhong Yu
- Australian Institute for Bioengineering and Nanotechnology (AIBN), the University of Queensland, Brisbane, QLD, 4067, Australia
| | - Bin Shi
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, People's Republic of China.
- Department of Dental Implantology, School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China.
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87
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Abstract
Osteoporosis is still a serious issue in healthcare, and will continue to increase due to the aging and growth of the population. Early diagnosis is the key to successfully treating many diseases. The earlier the osteoporosis is diagnosed, the more quickly people can take action to stop bone deterioration. Motivated by this, researchers and companies have begun developing smart in situ bone sensors in order to dramatically help people to monitor their bone mass density (BMD), bone strain or bone turnover markers (BTMs); promptly track early signs of osteoporosis; and even monitor the healing process following surgery or antiresorptive therapy. This paper focuses on the latest advancements in the field of bone biosensing materials and sensor technologies and how they can help now and in the future to detect disease and monitor bone health.
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Affiliation(s)
- Luting Liu
- Department of Chemical Engineering, Northeastern University, Boston, MA, 02115, USA
| | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston, MA, 02115, USA.
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
- Wenzhou Institute of Biomaterials and Engineering, Wenzhou Medical University, Wenzhou, 325000, China.
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88
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Gonzalo-Juan I, Detsch R, Mathur S, Ionescu E, Boccaccini AR, Riedel R. Synthesis and In Vitro Activity Assessment of Novel Silicon Oxycarbide-Based Bioactive Glasses. MATERIALS 2016; 9:ma9120959. [PMID: 28774079 PMCID: PMC5456995 DOI: 10.3390/ma9120959] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 11/12/2016] [Accepted: 11/15/2016] [Indexed: 11/16/2022]
Abstract
Novel bioactive glasses based on a Ca- and Mg-modified silicon oxycarbide (SiCaMgOC) were prepared from a polymeric single-source precursor, and their in vitro activity towards hydroxyapatite mineralization was investigated upon incubating the samples in simulated body fluid (SBF) at 37 °C. The as-prepared materials exhibit an outstanding resistance against devitrification processes and maintain their amorphous nature even after exposure to 1300 °C. The X-ray diffraction (XRD) analysis of the SiCaMgOC samples after the SBF test showed characteristic reflections of apatite after only three days, indicating a promising bioactivity. The release kinetics of the Ca2+ and Mg2+ and the adsorption of H⁺ after immersion of SiCaMgOC in simulated body fluid for different soaking times were analyzed via optical emission spectroscopy. The results show that the mechanism of formation of apatite on the surface of the SiCaMgOC powders is similar to that observed for standard (silicate) bioactive glasses. A preliminary cytotoxicity investigation of the SiOC-based bioactive glasses was performed in the presence of mouse embryonic fibroblasts (MEF) as well as human embryonic kidney cells (HEK-293). Due to their excellent high-temperature crystallization resistance in addition to bioactivity, the Ca- and Mg-modified SiOC glasses presented here might have high potential in applications related to bone repair and regeneration.
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Affiliation(s)
- Isabel Gonzalo-Juan
- FB Material-und Geowissenschaften, Technische Universität Darmstadt, Jovanka-Bontschits-Strasse 2, Darmstadt D-64287, Germany.
| | - Rainer Detsch
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstrasse 6, Erlangen D-91058, Germany.
| | - Sanjay Mathur
- Institute for Inorganic Chemistry, University of Cologne, Greinstrasse 6, Köln D-50939, Germany.
| | - Emanuel Ionescu
- FB Material-und Geowissenschaften, Technische Universität Darmstadt, Jovanka-Bontschits-Strasse 2, Darmstadt D-64287, Germany.
| | - Aldo R Boccaccini
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, Cauerstrasse 6, Erlangen D-91058, Germany.
| | - Ralf Riedel
- FB Material-und Geowissenschaften, Technische Universität Darmstadt, Jovanka-Bontschits-Strasse 2, Darmstadt D-64287, Germany.
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89
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Kuczera P, Adamczak M, Więcek A. Treatment with cinacalcet increases plasma sclerostin concentration in hemodialysis patients with secondary hyperparathyroidism. BMC Nephrol 2016; 17:176. [PMID: 27846800 PMCID: PMC5111350 DOI: 10.1186/s12882-016-0392-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Accepted: 11/08/2016] [Indexed: 01/02/2023] Open
Abstract
Background Sclerostin is a paracrine acting factor, which is expressed in the osteocytes and articular chondrocytes. Sclerostin decreases the osteoblast-related bone formation through the inhibition of the Wnt/β-catenin pathway. Osteocytes also express the Calcium sensing receptor which is a target for cinacalcet. The aim of this study was to assess the influence of six-month cinacalcet treatment on plasma sclerostin concentration in hemodialysed patients with secondary hyperparathyroidism (sHPT). Methods In 58 hemodialysed patients with sHPT (PTH > 300 pg/ml) plasma sclerostin and serum PTH, calcium and phosphate concentrations were assessed before the first dose of cinacalcet and after 3 and 6 months of treatment. Results Serum PTH concentration decreased after 3 and 6 month of treatment from 1138 (931–1345) pg/ml to 772 (551–992) pg/ml and to 635 (430–839) pg/ml, respectively. Mean serum calcium and phosphate concentrations remained stable. Plasma sclerostin concentration increased after 3 and 6 months of treatment from 1.66 (1.35–1.96) ng/ml, to 1.77 (1.43–2.12) ng/ml and to 1.87 (1.50–2.25) ng/ml, respectively. In 42 patients with cinacalcet induced serum PTH decrease plasma sclerostin concentration increased after 3 and 6 months of treatment from 1.51 (1.19–1.84) ng/ml to 1.59 (1.29–1.89) ng/ml and to 1.75 (1.42–2.01) ng/ml, respectively. Contrary, in the 16 patients without cinacalcet induced serum PTH decrease plasma sclerostin concentration was stable. Plasma sclerostin concentrations correlated inversely with serum PTH concentrations at the baseline and also after 6 months of treatment. Conclusions 1. In hemodialysed patients with secondary hyperparathyroidism treatment with cinacalcet increases plasma sclerostin concentration 2. This effect seems to be related to decrease of serum PTH concentration.
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Affiliation(s)
- Piotr Kuczera
- Department of Nephrology, Transplantation and Internal Medicine, Medical University of Silesia, Francuska 20/24 Str, 40-027, Katowice, Poland
| | - Marcin Adamczak
- Department of Nephrology, Transplantation and Internal Medicine, Medical University of Silesia, Francuska 20/24 Str, 40-027, Katowice, Poland
| | - Andrzej Więcek
- Department of Nephrology, Transplantation and Internal Medicine, Medical University of Silesia, Francuska 20/24 Str, 40-027, Katowice, Poland.
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90
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Keenan T, Placek L, Coughlan A, Bowers G, Hall M, Wren A. Structural characterization and anti-cancerous potential of gallium bioactive glass/hydrogel composites. Carbohydr Polym 2016; 153:482-491. [DOI: 10.1016/j.carbpol.2016.07.100] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 07/20/2016] [Accepted: 07/23/2016] [Indexed: 01/28/2023]
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91
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Wagner AS, Glenske K, Wolf V, Fietz D, Mazurek S, Hanke T, Moritz A, Arnhold S, Wenisch S. Osteogenic differentiation capacity of human mesenchymal stromal cells in response to extracellular calcium with special regard to connexin 43. Ann Anat 2016; 209:18-24. [PMID: 27746221 DOI: 10.1016/j.aanat.2016.09.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 07/13/2016] [Accepted: 09/09/2016] [Indexed: 02/02/2023]
Abstract
The effects of extracellular calcium on osteogenic differentiation capacity of human bone-derived mesenchymal stromal cells with special regard to connexin 43 (cx43) have been investigated by means of cell culture experiments. Mesenchymal stromal cells isolated from human cancellous bone were cultured on tissue culture plates at different calcium ion (Ca2+) concentrations (1.8mmoll-1, 10mmoll-1, 20mmoll-1). Cell responses were evaluated by quantitative RT-PCR, immunofluorescence staining, and Lucifer Yellow fluorescence uptake experiments. It could be shown that increasing Ca2+ concentrations correlate with increasing cx43 and bone sialoprotein mRNA levels as well as with enhanced cx43 fluorescence signaling and matrix mineralization of the cultures as shown by von Kossa staining. Hemichannel gating - assessed by Lucifer Yellow uptake - increases with increasing extracellular Ca2+ concentrations suggesting that regulatory effects at the hemichannel level are calcium-dependent.
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Affiliation(s)
- Alena-Svenja Wagner
- Department of Veterinary Clinical Sciences, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Giessen, Frankfurter Straße 98, Giessen, Germany.
| | - Kristina Glenske
- Department of Veterinary Clinical Sciences, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Giessen, Frankfurter Straße 98, Giessen, Germany
| | - Verena Wolf
- Department of Veterinary Clinical Sciences, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Giessen, Frankfurter Straße 98, Giessen, Germany
| | - Daniela Fietz
- Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Giessen, Frankfurter Straße 98, Giessen, Germany
| | - Sybille Mazurek
- Institute of Veterinary Physiology and Biochemistry, Justus-Liebig-University Giessen, Frankfurter Straße 100, Giessen, Germany
| | - Thomas Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technische Universität Dresden, Budapester Straße 27, Dresden, Germany
| | - Andreas Moritz
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University Giessen, Frankfurter Straße 126, Giessen, Germany
| | - Stefan Arnhold
- Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Giessen, Frankfurter Straße 98, Giessen, Germany
| | - Sabine Wenisch
- Department of Veterinary Clinical Sciences, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Giessen, Frankfurter Straße 98, Giessen, Germany
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92
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Li M, He P, Wu Y, Zhang Y, Xia H, Zheng Y, Han Y. Stimulatory effects of the degradation products from Mg-Ca-Sr alloy on the osteogenesis through regulating ERK signaling pathway. Sci Rep 2016; 6:32323. [PMID: 27580744 PMCID: PMC5007487 DOI: 10.1038/srep32323] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 08/05/2016] [Indexed: 12/30/2022] Open
Abstract
The influence of Mg-1Ca-xwt.% Sr (x = 0.2, 0.5, 1.0, 2.0) alloys on the osteogenic differentiation and mineralization of pre-osteoblast MC3T3-E1 were studied through typical differentiation markers, such as intracellular alkaline phosphatase (ALP) activity, extracellular collagen secretion and calcium nodule formation. It was shown that Mg-1Ca alloys with different content of Sr promoted cell viability and enhanced the differentiation and mineralization levels of osteoblasts, and Mg-1Ca-2.0Sr alloy had the most remarkable and significant effect among all. To further investigate the underlying mechanisms, RT-PCR and Western Blotting assays were taken to analyze the mRNA expression level of osteogenesis-related genes and intracellular signaling pathways involved in osteogenesis, respectively. RT-PCR results showed that Mg-1Ca-2.0Sr alloy significantly up-regulated the expressions of the transcription factors of Runt-related transcription factor 2 (RUNX2) and Osterix (OSX), Integrin subunits, as well as alkaline phosphatase (ALP), Bone sialoprotein (BSP), Collagen I (COL I), Osteocalcin (OCN) and Osteopontin (OPN). Western Blotting results suggested that Mg-1Ca-2.0Sr alloy rapidly induced extracellular signal-regulated kinase (ERK) activation but showed no obvious effects on c-Jun N terminal kinase (JNK) and p38 kinase of MAPK. Taken together, our results demonstrated that Mg-1Ca-2.0Sr alloy had excellent biocompatibility and osteogenesis via the ERK pathway and is expected to be promising as orthopedic implants and bone repair materials.
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Affiliation(s)
- Mei Li
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Peng He
- Department of Orthopedics, Nanjing General Hospital of Nanjing Military Command, 305 zhongshandong road, Nanjing 210002, China
| | - Yuanhao Wu
- Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Yu Zhang
- Department of Orthopedics, Guangdong Key Lab of Orthopaedic Technology and Implant Materials, Guangzhou General Hospital of Guangzhou military command, 111 Liuhua Road, Guangzhou 510010, China
| | - Hong Xia
- Department of Orthopedics, Guangdong Key Lab of Orthopaedic Technology and Implant Materials, Guangzhou General Hospital of Guangzhou military command, 111 Liuhua Road, Guangzhou 510010, China
| | - Yufeng Zheng
- Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China.,Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Yong Han
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
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93
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van der Meijden K, van Essen HW, Bloemers FW, Schulten EAJM, Lips P, Bravenboer N. Regulation of CYP27B1 mRNA Expression in Primary Human Osteoblasts. Calcif Tissue Int 2016; 99:164-73. [PMID: 27016371 PMCID: PMC4932130 DOI: 10.1007/s00223-016-0131-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 03/11/2016] [Indexed: 12/12/2022]
Abstract
The enzyme 1α-hydroxylase (gene CYP27B1) catalyzes the synthesis of 1,25(OH)2D in both renal and bone cells. While renal 1α-hydroxylase is tightly regulated by hormones and 1,25(OH)2D itself, the regulation of 1α-hydroxylase in bone cells is poorly understood. The aim of this study was to investigate in a primary human osteoblast culture whether parathyroid hormone (PTH), fibroblast growth factor 23 (FGF23), calcitonin, calcium, phosphate, or MEPE affect mRNA levels of CYP27B1. Our results show that primary human osteoblasts in the presence of high calcium concentrations increase their CYP27B1 mRNA levels by 1.3-fold. CYP27B1 mRNA levels were not affected by PTH1-34, rhFGF23, calcitonin, phosphate, and rhMEPE. Our results suggest that the regulation of bone 1α-hydroxylase is different from renal 1α-hydroxylase. High calcium concentrations in bone may result in an increased local synthesis of 1,25(OH)2D leading to an enhanced matrix mineralization. In this way, the local synthesis of 1,25(OH)2D may contribute to the stimulatory effect of calcium on matrix mineralization.
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Affiliation(s)
- K van der Meijden
- Department of Internal Medicine/Endocrinology, VU University Medical Center, Research Institute MOVE, Amsterdam, The Netherlands
| | - H W van Essen
- Department of Clinical Chemistry, VU University Medical Center, Research Institute MOVE, PO Box 7057, 1007 MB, Amsterdam, The Netherlands
| | - F W Bloemers
- Department of Trauma Surgery, VU University Medical Center, Amsterdam, The Netherlands
| | - E A J M Schulten
- Department of Oral and Maxillofacial Surgery/Oral Pathology, VU University Medical Center, Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, The Netherlands
| | - P Lips
- Department of Internal Medicine/Endocrinology, VU University Medical Center, Research Institute MOVE, Amsterdam, The Netherlands
| | - N Bravenboer
- Department of Clinical Chemistry, VU University Medical Center, Research Institute MOVE, PO Box 7057, 1007 MB, Amsterdam, The Netherlands.
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94
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Liang GB, Zhou C, Huo X, Wang H, Yang X, Huang S, Wang H, Wilkinson H, Luo L, Tang W, Sutton D, Li H, Zaller D, Meinke PT. Discovery of novel dihydrobenzofuran cyclopropane carboxylic acid based calcium sensing receptor antagonists for the treatment of osteoporosis. Bioorg Med Chem Lett 2016; 26:4077-80. [DOI: 10.1016/j.bmcl.2016.06.073] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 06/06/2016] [Accepted: 06/25/2016] [Indexed: 01/12/2023]
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95
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Lv F, Zhu L, Zhang J, Yu J, Cheng X, Peng B. Evaluation of the in vitro
biocompatibility of a new fast-setting ready-to-use root filling and repair material. Int Endod J 2016; 50:540-548. [PMID: 27214303 DOI: 10.1111/iej.12661] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 05/17/2016] [Indexed: 11/29/2022]
Affiliation(s)
- F. Lv
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School and Hospital of Stomatology; Wuhan University; Wuhan China
| | - L. Zhu
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School and Hospital of Stomatology; Wuhan University; Wuhan China
| | - J. Zhang
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School and Hospital of Stomatology; Wuhan University; Wuhan China
| | - J. Yu
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School and Hospital of Stomatology; Wuhan University; Wuhan China
| | - X. Cheng
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School and Hospital of Stomatology; Wuhan University; Wuhan China
| | - B. Peng
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education; School and Hospital of Stomatology; Wuhan University; Wuhan China
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96
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Schumacher M, Wagner AS, Kokesch-Himmelreich J, Bernhardt A, Rohnke M, Wenisch S, Gelinsky M. Strontium substitution in apatitic CaP cements effectively attenuates osteoclastic resorption but does not inhibit osteoclastogenesis. Acta Biomater 2016; 37:184-94. [PMID: 27084107 DOI: 10.1016/j.actbio.2016.04.016] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 04/01/2016] [Accepted: 04/11/2016] [Indexed: 12/15/2022]
Abstract
UNLABELLED Strontium ions were discovered to exert a dual effect on bone turnover, namely an inhibition of cell-driven bone resorption and a simultaneous stimulation of new bone tissue formation. A variety of strontium containing calcium phosphate bone cements (SrCPC) have been developed to benefit from both effects to locally support the healing of osteoporotic bone defects. While the stimulating effect of strontium modification on bone forming cells has been demonstrated in a number of studies, this study focuses on the inhibition and/or reduction of osteoclastogenesis and osteoclastic resorption by a strontium substituted calcium phosphate bone cement (SrCPC). Human peripheral blood mononuclear cells (PBMC) were differentiated into osteoclasts in the presence of different Sr(2+)-concentrations as well as on the surface of SrCPC disks. Osteoclastogenesis of PBMC was shown to be merely unaffected by medium Sr(2+)-concentrations comparable to those released from SrCPC in vitro (0.05-0.15mM). However, an altering effect of 0.1mM strontium on the cytoskeleton of osteoclast-like cells was shown. In direct contact to SrCPC disks, these cells exhibited typical morphological features and osteoclast markers on both RNA and protein level were formed. However, calcium phosphate resorption was significantly decreased on strontium-containing cements in comparison to a strontium-free control. This was accompanied by an intracellular accumulation of strontium that increased with substrate strontium content as demonstrated by Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS). This study illustrates that SrCPC do not inhibit osteoclastogenesis but significantly attenuate osteoclastic substrate resorption in vitro. STATEMENT OF SIGNIFICANCE Strontium ions have been shown to promote bone formation and inhibit bone resorption. Therefore strontium is successfully used in the treatment of osteoporosis and also inspired the development of strontium-containing strontium/calcium phosphate bone cements (SrCPC). Studies have shown the positive effects of SrCPC on bone formation, however, the inhibiting effect of strontium on bone resorption in the context of such cements has not been shown so far. We found that the formation of bone-resorbing osteoclasts is not inhibited, but that their resorption activity is decreased in contact to SrCPC. The former is important since those cells play an important role in the bone cell signaling. The latter is a key requirement in osteoporosis therapy, which addresses excess bone resorption.
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Affiliation(s)
- M Schumacher
- Centre for Translational Bone, Joint and Soft Tissue Research, Medical Faculty and University Hospital, Technische Universität Dresden, Dresden, Germany.
| | - A S Wagner
- Department of Veterinary Clinical Sciences, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Giessen, Giessen, Germany
| | | | - A Bernhardt
- Centre for Translational Bone, Joint and Soft Tissue Research, Medical Faculty and University Hospital, Technische Universität Dresden, Dresden, Germany
| | - M Rohnke
- Institute of Physical Chemistry, Justus-Liebig-University Giessen, Giessen, Germany
| | - S Wenisch
- Department of Veterinary Clinical Sciences, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Giessen, Giessen, Germany
| | - M Gelinsky
- Centre for Translational Bone, Joint and Soft Tissue Research, Medical Faculty and University Hospital, Technische Universität Dresden, Dresden, Germany
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97
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Tharmalingam S, Hampson DR. The Calcium-Sensing Receptor and Integrins in Cellular Differentiation and Migration. Front Physiol 2016; 7:190. [PMID: 27303307 PMCID: PMC4880553 DOI: 10.3389/fphys.2016.00190] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 05/11/2016] [Indexed: 12/12/2022] Open
Abstract
The calcium-sensing receptor (CaSR) is a widely expressed homodimeric G-protein coupled receptor structurally related to the metabotropic glutamate receptors and GPRC6A. In addition to its well characterized role in maintaining calcium homeostasis and regulating parathyroid hormone release, evidence has accumulated linking the CaSR with cellular differentiation and migration, brain development, stem cell engraftment, wound healing, and tumor growth and metastasis. Elevated expression of the CaSR in aggressive metastatic tumors has been suggested as a potential novel prognostic marker for predicting metastasis, especially to bone tissue where extracellular calcium concentrations may be sufficiently high to activate the receptor. Recent evidence supports a model whereby CaSR-mediated activation of integrins promotes cellular migration. Integrins are single transmembrane spanning heterodimeric adhesion receptors that mediate cell migration by binding to extracellular matrix proteins. The CaSR has been shown to form signaling complexes with the integrins to facilitate both the movement and differentiation of cells, such as neurons during normal brain development and tumor cells under pathological circumstances. Thus, CaSR/integrin complexes may function as a universal cell migration or homing complex. Manipulation of this complex may be of potential interest for treating metastatic cancers, and for developmental disorders pertaining to aberrant neuronal migration.
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Affiliation(s)
| | - David R Hampson
- Pharmaceutical Sciences, University of Toronto Toronto, ON, Canada
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98
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Keenan TJ, Placek LM, Keenan NL, Hall MM, Wren AW. Synthesis, characterization, and in vitro cytocompatibility of Ga-bioactive glass/polymer hydrogel composites. J Biomater Appl 2016; 31:553-567. [PMID: 27117744 DOI: 10.1177/0885328216646655] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A bioactive glass series (0.42SiO2-0.10Na2O-0.08CaO-(0.40-x)ZnO-(x)Ga2O3) was incorporated in carboxymethyl cellulose-dextran hydrogels at three different loadings (0.05, 0.10, and 0.25 m2), and the resulting composites were characterized using scanning electron microscopy, physical swelling characteristics, and inductively coupled plasma optical emission spectroscopy. In vitro cytocompatibility was also evaluated for composite extracts in contact with L-929 mouse fibroblasts and MC3T3-E1 human osteoblasts. Scanning electron microscopy confirmed that glass particles were distributed throughout the hydrogels, and swelling studies showed that glass presence can increase the amount of fluid that can be absorbed by the hydrogels after seven days of immersion in phosphate-buffered saline by up to 180%. Several trends were observed in the inductively coupled plasma optical emission spectroscopy data, with the most important being the release of Ga3+ from both Ga-containing glasses at all three loadings, with a maximum of 4.7 mg/L released after 30 days of incubation in phosphate-buffered saline. Cell viability analysis suggested that most composite extracts did not decrease neither fibroblast nor osteoblast viability. These results indicate that it is possible to embed bioactive glass particles into carboxymethyl cellulose-dextran hydrogels, and upon submersion in aqueous media, release ions from the glass particles that may elicit therapeutic effects.
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Affiliation(s)
- T J Keenan
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - L M Placek
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - N L Keenan
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - M M Hall
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - A W Wren
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
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99
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Laiuppa JA, Santillán GE. Effect of Combined Action of Extracellular ATP and Elevated Calcium on Osteogenic Differentiation of Primary Cultures From Rat Calvaria. J Cell Biochem 2016; 117:2658-68. [PMID: 27038365 DOI: 10.1002/jcb.25565] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 03/31/2016] [Indexed: 11/06/2022]
Abstract
The in vitro osteogenic differentiation has been intensively studied. However, it is not yet clear precisely how osteogenesis can be optimized. Changes in extracellular Ca(2+) concentration ([Ca(2+) ]e ), as well as modulation of purinergic receptors play an important role in the regulation of osteoblasts differentiation and bone formation. In this study, we investigated the effects of a combined treatment of ATPγ-S and high [Ca(2+) ]e (5.35 mM) on osteogenic differentiation and function of primary cell cultures from rat calvaria. Our results indicate that ATPγ-S stimulates cell transition from the G0 to S phase of cell cycle, involving the PI3K signaling pathway. Treatment with 10 or 100 µM ATPγ-S and [Ca(2+) ]e (ATP-[Ca(2+) ]e ) for 48 h increases cell number significantly above the control. ATPγ-S treatment in osteogenic medium containing [Ca(2+) ]e stimulates the gene expression of BMP-4, BMP-5, and OPN at 16, 48, and 72 h, respectively, above control. In same conditions, treatment for 6 days with 10 µM UTP or 100 µM UDP significantly increased the ALP activity respect to control. Cells grown in osteogenic medium showed a statistically significant increase in calcium deposits at 15 and 18 days, for 10 µM ATPγ-S treatment, and at 18 and 22 days, for [Ca(2+) ]e treatment, respect to control but ATP-[Ca(2+) ]e treatment shown a significant greater mineralization at 15 days respect to ATPγ-S, and at 18 days respect to both agonists. In conclusion, we demonstrated that an osteogenic medium containing 10 µM ATPγ-S and 5.35 mM [Ca(2+) ]e enhance osteogenesis and mineralization by rat primary calvarial cells cultures. J. Cell. Biochem. 117: 2658-2668, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Juan A Laiuppa
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, CONICET, San Juan 670, (B8000ICN) Bahía Blanca, Argentina
| | - Graciela E Santillán
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, CONICET, San Juan 670, (B8000ICN) Bahía Blanca, Argentina.
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Leach K, Gregory KJ, Kufareva I, Khajehali E, Cook AE, Abagyan R, Conigrave AD, Sexton PM, Christopoulos A. Towards a structural understanding of allosteric drugs at the human calcium-sensing receptor. Cell Res 2016; 26:574-92. [PMID: 27002221 DOI: 10.1038/cr.2016.36] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 12/18/2015] [Accepted: 01/28/2016] [Indexed: 12/19/2022] Open
Abstract
Drugs that allosterically target the human calcium-sensing receptor (CaSR) have substantial therapeutic potential, but are currently limited. Given the absence of high-resolution structures of the CaSR, we combined mutagenesis with a novel analytical approach and molecular modeling to develop an "enriched" picture of structure-function requirements for interaction between Ca(2+)o and allosteric modulators within the CaSR's 7 transmembrane (7TM) domain. An extended cavity that accommodates multiple binding sites for structurally diverse ligands was identified. Phenylalkylamines bind to a site that overlaps with a putative Ca(2+)o-binding site and extends towards an extracellular vestibule. In contrast, the structurally and pharmacologically distinct AC-265347 binds deeper within the 7TM domains. Furthermore, distinct amino acid networks were found to mediate cooperativity by different modulators. These findings may facilitate the rational design of allosteric modulators with distinct and potentially pathway-biased pharmacological effects.
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Affiliation(s)
- Katie Leach
- Drug Discovery Biology, Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Karen J Gregory
- Drug Discovery Biology, Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Irina Kufareva
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92037, USA
| | - Elham Khajehali
- Drug Discovery Biology, Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Anna E Cook
- Drug Discovery Biology, Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Ruben Abagyan
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92037, USA
| | - Arthur D Conigrave
- School of Molecular Bioscience, Charles Perkins Centre, University of Sydney, NSW 2006, Australia
| | - Patrick M Sexton
- Drug Discovery Biology, Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
| | - Arthur Christopoulos
- Drug Discovery Biology, Department of Pharmacology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia
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