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Roszkowska M, Strzelecka-Kiliszek A, Bessueille L, Buchet R, Magne D, Pikula S. Collagen promotes matrix vesicle-mediated mineralization by vascular smooth muscle cells. J Inorg Biochem 2018; 186:1-9. [DOI: 10.1016/j.jinorgbio.2018.05.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/20/2018] [Accepted: 05/16/2018] [Indexed: 02/08/2023]
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2
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Winning L, Robinson L, Boyd AR, El Karim IA, Lundy FT, Meenan BJ. Osteoblastic differentiation of periodontal ligament stem cells on non-stoichiometric calcium phosphate and titanium surfaces. J Biomed Mater Res A 2017; 105:1692-1702. [DOI: 10.1002/jbm.a.36044] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 01/27/2017] [Accepted: 02/16/2017] [Indexed: 01/20/2023]
Affiliation(s)
- Lewis Winning
- Centre for Experimental Medicine, The Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast; 97 Lisburn Road Belfast Northern Ireland BT9 7BL United Kingdom
| | - Leanne Robinson
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering; Ulster University; Shore Road, Newtownabbey, Co. Antrim Northern Ireland BT37 0QB United Kingdom
| | - Adrian R. Boyd
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering; Ulster University; Shore Road, Newtownabbey, Co. Antrim Northern Ireland BT37 0QB United Kingdom
| | - Ikhlas A. El Karim
- Centre for Experimental Medicine, The Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast; 97 Lisburn Road Belfast Northern Ireland BT9 7BL United Kingdom
| | - Fionnuala T. Lundy
- Centre for Experimental Medicine, The Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast; 97 Lisburn Road Belfast Northern Ireland BT9 7BL United Kingdom
| | - Brian J. Meenan
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering; Ulster University; Shore Road, Newtownabbey, Co. Antrim Northern Ireland BT37 0QB United Kingdom
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3
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Álvarez-Lloret P, Lee CM, Conti MI, Terrizzi AR, González-López S, Martínez MP. Effects of chronic lead exposure on bone mineral properties in femurs of growing rats. Toxicology 2016; 377:64-72. [PMID: 27915097 DOI: 10.1016/j.tox.2016.11.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/19/2016] [Accepted: 11/27/2016] [Indexed: 11/26/2022]
Abstract
Lead exposure has been associated with several defective skeletal growth processes and bone mineral alterations. The aim of the present study is to make a more detailed description of the toxic effects of lead intoxication on bone intrinsic material properties as mineral composition, morphology and microstructural characteristics. For this purpose, Wistar rats were exposed (n=12) to 1000ppm lead acetate in drinking water for 90days while control group (n=8) were treated with sodium acetate. Femurs were examined using inductively coupled plasma optical emission spectrometry (ICP-OES), Attenuated Total Reflection Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), and micro-Computed Tomography (μCT). Results showed that femur from the lead-exposed rats had higher carbonate content in bone mineral and (Ca2++Mg2++ Na+)/P ratio values, although no variations were observed in crystal maturity and crystallite size. From morphological analyses, lead exposure rats showed a decreased in trabecular bone surface and distribution while trabecular thickness and cortical area increased. These overall effects indicate a similar mechanism of bone maturation normally associated to age-related processes. These responses are correlated with the adverse actions induced by lead on the processes regulating bone turnover mechanism. This information may explain the osteoporosis diseases associated to lead intoxication as well as the risk of fracture observed in populations exposed to this toxicant.
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Affiliation(s)
- Pedro Álvarez-Lloret
- Departamento de Geología, Facultad de Geología, Universidad de Oviedo, Oviedo, Spain.
| | - Ching Ming Lee
- Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Fisiología, Buenos Aires, Argentina
| | - María Inés Conti
- Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Fisiología, Buenos Aires, Argentina
| | - Antonela Romina Terrizzi
- Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Fisiología, Buenos Aires, Argentina
| | | | - María Pilar Martínez
- Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Fisiología, Buenos Aires, Argentina
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4
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Bessueille L, Magne D. Inflammation: a culprit for vascular calcification in atherosclerosis and diabetes. Cell Mol Life Sci 2015; 72:2475-89. [PMID: 25746430 PMCID: PMC11113748 DOI: 10.1007/s00018-015-1876-4] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 02/06/2015] [Accepted: 02/26/2015] [Indexed: 12/16/2022]
Abstract
It is today acknowledged that aging is associated with a low-grade chronic inflammatory status, and that inflammation exacerbates age-related diseases such as osteoporosis, Alzheimer's disease, atherosclerosis and type 2 diabetes mellitus (T2DM). Vascular calcification is a complication that also occurs during aging, in particular in association with atherosclerosis and T2DM. Recent studies provided compelling evidence that vascular calcification is associated with inflammatory status and is enhanced by inflammatory cytokines. In the present review, we propose on one hand to highlight the most important and recent findings on the cellular and molecular mechanisms of vascular inflammation in atherosclerosis and T2DM. On the other hand, we will present the effects of inflammatory mediators on the trans-differentiation of vascular smooth muscle cell and on the deposition of crystals. Since vascular calcification significantly impacts morbidity and mortality in affected individuals, a better understanding of its induction and development will pave the way to develop new therapeutic strategies.
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Affiliation(s)
- L. Bessueille
- University of Lyon, ICBMS UMR CNRS 5246, Bâtiment Raulin, 43 Bd du 11 novembre 1918, 69622 Villeurbanne Cedex, France
| | - D. Magne
- University of Lyon, ICBMS UMR CNRS 5246, Bâtiment Raulin, 43 Bd du 11 novembre 1918, 69622 Villeurbanne Cedex, France
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5
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Rivas M, Casanovas J, del Valle LJ, Bertran O, Revilla-López G, Turon P, Puiggalí J, Alemán C. An experimental-computer modeling study of inorganic phosphates surface adsorption on hydroxyapatite particles. Dalton Trans 2015; 44:9980-91. [DOI: 10.1039/c5dt00209e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The adsorption of different phosphates and a triphosphonate onto hydroxyapatite has been highlighted combining experiments and theoretical calculations.
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Affiliation(s)
- Manuel Rivas
- Departament d'Enginyeria Química
- E. T. S. d'Enginyeria Industrial de Barcelona
- Universitat Politècnica de Catalunya
- 08028 Barcelona
- Spain
| | - Jordi Casanovas
- Departament de Química
- Escola Politècnica Superior
- Universitat de Lleida
- Lleida E-25001
- Spain
| | - Luis J. del Valle
- Departament d'Enginyeria Química
- E. T. S. d'Enginyeria Industrial de Barcelona
- Universitat Politècnica de Catalunya
- 08028 Barcelona
- Spain
| | - Oscar Bertran
- Departament de Física Aplicada
- EEI
- Universitat Politècnica de Catalunya
- 08700 Igualada
- Spain
| | - Guillermo Revilla-López
- Departament d'Enginyeria Química
- E. T. S. d'Enginyeria Industrial de Barcelona
- Universitat Politècnica de Catalunya
- 08028 Barcelona
- Spain
| | - Pau Turon
- B. Braun Surgical
- 08191 Rubí (Barcelona)
- Spain
| | - Jordi Puiggalí
- Departament d'Enginyeria Química
- E. T. S. d'Enginyeria Industrial de Barcelona
- Universitat Politècnica de Catalunya
- 08028 Barcelona
- Spain
| | - Carlos Alemán
- Departament d'Enginyeria Química
- E. T. S. d'Enginyeria Industrial de Barcelona
- Universitat Politècnica de Catalunya
- 08028 Barcelona
- Spain
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6
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del Valle LJ, Bertran O, Chaves G, Revilla-López G, Rivas M, Casas MT, Casanovas J, Turon P, Puiggalí J, Alemán C. DNA adsorbed on hydroxyapatite surfaces. J Mater Chem B 2014; 2:6953-6966. [DOI: 10.1039/c4tb01184h] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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7
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Kolmas J, Prządka R. Benign odontogenic tumors versus histochemically related tissues: preliminary results from mid-infrared and solid-state nuclear magnetic resonance spectroscopy. APPLIED SPECTROSCOPY 2014; 68:663-671. [PMID: 25014722 DOI: 10.1366/13-07264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Three types of human odontogenic tumors histologically classified as compound composite odontoma, ossifying fibroma, and Pindborg tumor were characterized using mid-infrared spectroscopy (mid-IR) and solid-state nuclear magnetic resonance (ssNMR). For comparison, human jawbone and dental mineralized tissues such as dentin, enamel, and dental cement were also characterized. The studies focused on the structural properties and chemical composition of pathological tissues versus histochemically related tissues. All analyzed tumors were composed of organic and mineral parts and water. Apatite was found to be the main constituent of the mineral part. Various components (water, structural hydroxyl groups, carbonate ions (CO(3)(2-)), and hydrogen phosphate ions (HPO(4)(2-))) and physicochemical parameters (index of apatite maturity and crystallinity) were examined. The highest organic/mineral ratio was observed in fibrocementoma, a finding that can be explained by the fibrous character of the tumor. The lowest relative HPO(4)(2-) content was found in odontoma. This tumor is characterized by the highest mineral crystallinity index and content of structural hydroxyl groups. The Pindborg tumor mineral portion was found to be poorly crystalline and rich in HPO(4)(2-). The relative CO(3)(2-) content was similar in all samples studied. The results of spectroscopic studies of odontogenic tumors were consistent with the standard histochemical analysis. It was shown that the various techniques of ssNMR and elaborate analysis of the mid-IR spectra, applied together, provide valuable information about calcified benign odontogenic tumors.
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Affiliation(s)
- Joanna Kolmas
- Medical University of Warsaw, Faculty of Pharmacy, Department of Inorganic and Analytical Chemistry ul. Banacha 1, 02-097 Warsaw, Poland
| | - Rafał Prządka
- Medical University of Warsaw, Faculty of Pharmacy, Department of Inorganic and Analytical Chemistry ul. Banacha 1, 02-097 Warsaw, Poland
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8
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Boyd AR, O'Kane C, O'Hare P, Burke GA, Meenan BJ. The influence of target stoichiometry on early cell adhesion of co-sputtered calcium-phosphate surfaces. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:2845-2861. [PMID: 23918527 DOI: 10.1007/s10856-013-5021-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 07/26/2013] [Indexed: 06/02/2023]
Abstract
The nature of the initial interaction between calcium phosphate (Ca-P) thin films and osteoblasts can be influenced by a number of different properties including the phase, crystallinity, stoichiometry and composition of the surface. There is still a strong interest in developing and studying Ca-P surfaces that have the ability to accurately control the osteoblast response. Radio frequency (RF) magnetron sputtering is a technique that allows for accurate control of the properties of deposited Ca-P coatings and has been studied extensively because of this fact. In this work, Ca-P coatings were co-deposited using RF magnetron sputtering in order to study the effect of changing the target stoichiometry on the initial in vitro behavior of MG63 osteoblast-like cells. The samples produced were analysed both as-deposited and after thermal annealing to 500 °C. After annealing XPS analyses of the samples co-deposited using tricalcium phosphate (TCP) materials gave a Ca/P ratio of 1.71 ± 0.01, as compared to those co-deposited from hydroxyapatite (HA) materials, with a Ca/P of 1.82 ± 0.06. In addition to this, the curve fitted XPS data indicated the presence of low levels of carbonate in the coatings. Despite this the XRD results for all of the annealed coatings were shown to be characteristic of pure HA with a preferred 002 orientation. The atomic force microscopy results also highlighted that both types of coatings had surface features of a similar size (200-220 nm). Both surfaces exhibited a degree of surface degradation, even after 1 h of cell culture. However, the TCP derived surfaces showed an enhanced osteoblastic cell response in terms of cell adhesion and cell proliferation in the earlier stages of cell culture than the surfaces deposited from HA. An improvement in the initial cell attachment and a potential for increased cell proliferation rates is viewed as a highly advantageous result in relation to controlling the osteoblast response on these surfaces.
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Affiliation(s)
- A R Boyd
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, University of Ulster, Shore Road, Newtownabbey, Co. Antrim, BT37 0QB, Northern Ireland, UK,
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9
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Gu C, Katti DR, Katti KS. Photoacoustic FTIR spectroscopic study of undisturbed human cortical bone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 103:25-37. [PMID: 23257327 DOI: 10.1016/j.saa.2012.10.062] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 10/15/2012] [Accepted: 10/25/2012] [Indexed: 06/01/2023]
Abstract
Chemical pretreatment has been the prevailing sample preparation procedure for infrared (IR) spectroscopic studies on bone. However, experiments have indicated that chemical pretreatment can potentially affect the interactions between the components. Typically the IR techniques have involved transmission experiments. Here we report experimental studies using photoacoustic Fourier transform infrared spectroscopy (PA-FTIR). As a nondestructive technique, PA-FTIR can detect absorbance spectrum from a sample at controllable sampling depth and with little or no sample preparation. Additionally, the coupling inert gas, helium, which is utilized in the PA-FTIR system, can inhibit bacteria growth of bone by displacing oxygen. Therefore, we used this technique to study the undisturbed human cortical bone. It is found that photoacoustic mode (linear-scan, LS-PA-FTIR) can obtain basically similar spectra of bone as compared to the traditional transmission mode, but it seems more sensitive to amide III and ν(2) carbonate bands. The ν(3) phosphate band is indicative of detailed mineral structure and symmetry of native bone. The PA-FTIR depth profiling experiments on human cortical bone also indicate the influence of water on OH band and the cutting effects on amide I and mineral bands. Our results indicate that phosphate ion geometry appears less symmetric in its undisturbed state as detected by the PA-FTIR as compared to higher symmetry observed using transmission techniques on disturbed samples. Moreover, the PA-FTIR spectra indicate a band at 1747 cm(-1) possibly resulting from CO stretching of lipids, cholesterol esters, and triglycerides from the arteries. Comparison of the spectra in transverse and longitudinal cross-sections demonstrates that, the surface area of the longitudinal section bone appears to have more organic matrix exposed and with higher mineral stoichiometry.
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Affiliation(s)
- Chunju Gu
- Department of Civil Engineering, North Dakota State University, Fargo, ND 58105, USA
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10
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Heredia A, Colin-Garcia M, Peña-Rico MA, Beltrán LFLA, Grácio J, Contreras-Torres FF, Rodríguez-Galván A, Bucio L, Basiuk VA. Thermal, infrared spectroscopy and molecular modeling characterization of bone: An insight in the apatite-collagen type I interaction. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/abc.2013.32027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Gopalakrishnan SB, Viswanathan G. Assessment of fluoride-induced changes on physicochemical and structural properties of bone and the impact of calcium on its control in rabbits. J Bone Miner Metab 2012; 30:154-63. [PMID: 21947781 DOI: 10.1007/s00774-011-0312-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Accepted: 08/11/2011] [Indexed: 11/25/2022]
Abstract
Bone deformities caused by the chronic intake of large quantities of fluoride and the beneficial effect of calcium on its control have been studied for many years, but only limited data are available on the quantitative effect of fluoride intake and the beneficial impact of calcium on fluoride-induced changes in bone at the molecular level. It is necessary to determine the degree of fluoride-induced changes in bone at different levels of fluoride intake to evaluate the optimum safe intake level of fluoride for maintaining bone health and quality. The ameliorative effect of calcium at different dose levels on minimizing fluoride-induced changes in bone is important to quantify the amount of calcium intake necessary for reducing fluoride toxicity. Thirty rabbits, 2 months old, were divided into five groups. Group I animals received 1 mg/l fluoride and 0.11% calcium diet; groups II and III received 10 mg/l fluoride and diet with 0.11% or 2.11% calcium, respectively; and groups IV and V received 150 mg/l fluoride and diet with 2.11% or 0.11% calcium, respectively. Analysis of bone density, ash content, fluoride, calcium, phosphorus, and Ca:P molar ratio levels after 6 months of treatment indicated that animals that received high fluoride with low-calcium diet showed significant detrimental changes in physicochemical properties of bone. Animals that received fluoride with high calcium intake showed notable amelioration of the impact of calcium on fluoride-induced changes in bone. The degree of fluoride-induced characteristic changes in structural properties such as crystalline size, crystallinity, and crystallographic "c"-axis length of bone apatite cells was also assessed by X-ray diffraction and Fourier transform infrared studies. X-ray images showed bone deformity changes such as transverse stress growth lines, soft tissue ossification, and calcification in different parts of bones as a result of high fluoride accumulation and the beneficial role of calcium intake on its control.
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Affiliation(s)
- Subarayan Bothi Gopalakrishnan
- Department of Pharmaceutical Chemistry, Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, 627012, Tamil Nadu, India.
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Kolmas J, Kalinowski E, Wojtowicz A, Kolodziejski W. Mid-infrared reflectance microspectroscopy of human molars: Chemical comparison of the dentin–enamel junction with the adjacent tissues. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2009.12.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Corno M, Rimola A, Bolis V, Ugliengo P. Hydroxyapatite as a key biomaterial: quantum-mechanical simulation of its surfaces in interaction with biomolecules. Phys Chem Chem Phys 2010; 12:6309-29. [DOI: 10.1039/c002146f] [Citation(s) in RCA: 117] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Vanleene M, Rey C, Ho Ba Tho MC. Relationships between density and Young's modulus with microporosity and physico-chemical properties of Wistar rat cortical bone from growth to senescence. Med Eng Phys 2008; 30:1049-56. [PMID: 18406196 DOI: 10.1016/j.medengphy.2007.12.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2007] [Revised: 12/17/2007] [Accepted: 12/28/2007] [Indexed: 11/24/2022]
Abstract
The aim of this study is to assess density and elastic properties of Wistar rat cortical bone from growth to senescence and to correlate them with morphological and physico-chemical properties of bone. During growth (from 1 to 9 months), bone density and Young's modulus were found to increase from 1659+/-85 to 2083+/-13 kg m(-3) and from 8+/-0.8 to 19.6+/-0.7 GPa respectively. Bone microporosity was found to decrease from 8.1+/-0.7% to 3.3+/-0.7%. Physico-chemical investigations exhibited a mineralization of bone matrix and a maturation of apatite crystals, as protein content decreased from 21.4+/-0.2% to 17.6+/-0.6% and apatite crystal size and carbonate content increased (c-axis length: from 151 to 173 A and CO(3)W%: from 4.1+/-0.3% to 6.1+/-0.2%). At adult age, all properties stabilized. During senescence, a slow decrease of mechanical properties was first observed (from 12 to 18 months, rho=2089+/-14 to 2042+/-30 kg m(-3) and E(3)=19.8 +/-1.3 to 14.8+/-1.5 GPa), followed by a stabilization. Physico-chemical properties stabilized while microporosity increased slightly (from 3.3% to 4%) but not significantly (p>0.05). A multiple regression analysis showed that morphological and physico-chemical properties had significant effects on density regression model. Microporosity had a greater effect on Young's modulus regression model than physico-chemical properties. This study showed that bone structure, mineralization and apatite maturation should be considered to improve the understanding of bone mechanical behaviour.
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Affiliation(s)
- M Vanleene
- Laboratoire de Biomécanique et génie Biomédical, CNRS-UMR 6600, Centre de Recherche de Royallieu, Université de Technologie de Compiègne, BP 20529, Compiègne cedex, France
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Abstract
Calcium-deficient hydroxylapatite (CDHA) powders with Ca/P ratios from1.5 to
1.67 were synthesized by wet-chemical method. Rietveld structure refinement was performed
on the X-ray diffraction data and Fourier transform infrared spectroscopy was used to
characterize molecular and crystal structure of CDHA. With the decrease of Ca/P ratio, the
crystallite size and crystallinity decreased, but the acid phosphate content and amount of
vacancies in hydroxyapatite hexagonal structure increased. The disorder of CDHA structure
increase indicated calcium-deficiency and HPO4 replacement resulted in disorder of crystal in
apatite structure. The more calcium is deficient, the more disorder or imperfect in CDHA
structure
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Burghardt AJ, Wang Y, Elalieh H, Thibault X, Bikle D, Peyrin F, Majumdar S. Evaluation of fetal bone structure and mineralization in IGF-I deficient mice using synchrotron radiation microtomography and Fourier transform infrared spectroscopy. Bone 2007; 40:160-8. [PMID: 16905376 DOI: 10.1016/j.bone.2006.06.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2006] [Revised: 06/07/2006] [Accepted: 06/29/2006] [Indexed: 11/24/2022]
Abstract
The role of insulin like growth factor-I (IGF-I) during pre-natal development has not been evaluated in detail. However, the high degree of growth retardation and peri-natal mortality in IGF-I deficient mouse models indicates that it plays a critical role during this time. Techniques to assess the structure and quality of bone in small animal fetuses could be beneficial in better understanding its role in bone metabolism and skeletal development. Synchrotron microtomography (SR-microCT) and Fourier transform infrared spectroscopy (FTIR) may provide methods to visualize and quantify differences in the structure and mineral density of bone in small animal fetuses. Tibia and spine from IGF-I deficient and wildtype fetal mice (18th day gestation) were imaged using SR-microCT. Three-dimensional structural indices and the degree of mineralization were determined for each sample. Mineralization was also assessed using FTIR and von Kossa staining. Bone volume was systematically lower in IGF-I -/- animals (tibia: -15%, p<0.05) while both sites were found to have a more rod-like architecture (24%, p<0.05; 113%, p<0.01) and lower trabecular separation (-16%, p<0.05; -21%, p<0.05). These structural results were mostly consistent with those seen in adult models of IGF-I deficiency. The degree of mineralization as measured by SR-microCT was higher in the IGF-I tibial metaphysis (11.7%, p<0.0001), while FTIR of the whole bone showed mineralization to be lower in the knockout group (-11%, p<0.05). Interestingly, von Kossa staining revealed no mineral content in the IGF-I -/- spinal ossification center while SR-microCT clearly indicated the presence of highly attenuating components, if somewhat lower in IGF-I -/- animals (-2.2%, p<0.05). This indicates that IGF-I deficiency is linked to subtle differences in the mineral environment and mineralization progression. The advantages unique to SR-microCT allow for 3D visualization and quantification of pre-natal bone microstructure and mineral density in mice which was not previously possible.
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Affiliation(s)
- Andrew J Burghardt
- Musculoskeletal Quantitative Imaging Research Group, Department of Radiology, University of California, San Francisco, QB3/Byers Hall, Suite 203, 1700 4th Street, San Francisco, CA 94158, USA.
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Milan AM, Sugars RV, Embery G, Waddington RJ. Adsorption and interactions of dentine phosphoprotein with hydroxyapatite and collagen. Eur J Oral Sci 2006; 114:223-31. [PMID: 16776772 DOI: 10.1111/j.1600-0722.2006.00347.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dentine phosphoprotein (DPP) has been proposed to both promote and inhibit mineral deposition during dentinogenesis. The present study aimed to investigate the molecular interactions of DPP and dephosphorylated DPP (DPP-p) with hydroxyapatite (HAP). Bovine DPP was purified and dephosphorylated by alkaline phosphatase to obtain DPP-p. DPP and DPP-p adsorption to HAP was determined along with their ability, when free in solution or bound to collagen, to influence HAP-induced crystal growth. Absorption isotherms suggested that lower DPP concentrations (1.5-6.25 microg ml(-1)) demonstrated a reduced affinity for HAP compared with higher protein concentrations (12.5-50.0 microg ml(-1)). Dephosphorylated DPP had a much reduced affinity for HAP compared with DPP. Dentine phosphoprotein inhibited seeded HAP crystal growth, in a dose-dependent manner, whilst removal of the phosphate groups reduced this inhibition. When bound to collagen fibrils, DPP significantly promoted the rate of HAP crystal growth over 0-8 min. Conversely, DPP-p and collagen significantly decreased the rate of crystal growth over 0-18 min. These results indicate a major role for the phosphate groups present on DPP in HAP crystal growth. In addition, concentration-dependent conformational changes to DPP, and the interaction with other matrix components, such as collagen, are important in predicting its dual role in the mineralization of dentine.
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Affiliation(s)
- Anna M Milan
- Department of Clinical Dental Sciences, The University of Liverpool, Liverpool, UK
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18
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Milev AS, Kamali Kannangara GS, Wilson MA. Strain and Microcrystallite Size in Synthetic Lamellar Apatite. J Phys Chem B 2004. [DOI: 10.1021/jp048677m] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adriyan S. Milev
- College of Science, Technology and Environment, University of Western Sydney, Locked Bag 1797, Penrith South DC 1797, Australia
| | - G. S. Kamali Kannangara
- College of Science, Technology and Environment, University of Western Sydney, Locked Bag 1797, Penrith South DC 1797, Australia
| | - Michael A. Wilson
- College of Science, Technology and Environment, University of Western Sydney, Locked Bag 1797, Penrith South DC 1797, Australia
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Magne D, Bluteau G, Lopez-Cazaux S, Weiss P, Pilet P, Ritchie HH, Daculsi G, Guicheux J. Development of an odontoblast in vitro model to study dentin mineralization. Connect Tissue Res 2004; 45:101-8. [PMID: 15763925 PMCID: PMC2020511 DOI: 10.1080/03008200490464839] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The aim of the present work was to characterize the odontoblastic proliferation, differentiation, and matrix mineralization in culture of the recently established M2H4 rat cell line. Proliferation was assessed by cell counts, differentiation by RT-PCR analysis, and mineralization by alizarin red staining, atomic absorption spectrometry, and FTIR microspectroscopy. The results showed that M2H4 cell behavior closely mimics in vivo odontoblast differentiation, with, in particular, temporally regulated expression of DMP-1 and DSPP. Moreover, the mineral phase formed by M2H4 cells was similar to that in dentin from rat incisors. Finally, because in mice, transforming growth factor (TGF)-beta1 over-expression in vivo leads to an hypomineralization similar to that observed in dentinogenesis imperfecta type II, effects of TGF-beta1 on mineralization in M2H4 cell culture were studied. Treatment with TGF-beta1 dramatically reduced mineralization, whereas positive control treatment with bone morphogenetic protein-4 enhanced it, suggesting that M2H4 cell line is a promising tool to explore the mineralization mechanisms in physiopathologic conditions.
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Affiliation(s)
- David Magne
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Gilles Bluteau
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Serena Lopez-Cazaux
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Pierre Weiss
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Paul Pilet
- Centre de microscopie électronique
CHU NantesUniversité de Nantes1 place Alexis Ricordeau
44042 Nantes,FR
| | - Helena H. Ritchie
- Department of Cariology, Restorative Sciences & Endodontics
University of MichiganSchool of Dentistry,US
| | - Guy Daculsi
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Jérôme Guicheux
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
- * Correspondence should be adressed to: Jérôme Guicheux
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Magne D, Bluteau G, Faucheux C, Palmer G, Vignes-Colombeix C, Pilet P, Rouillon T, Caverzasio J, Weiss P, Daculsi G, Guicheux J. Phosphate is a specific signal for ATDC5 chondrocyte maturation and apoptosis-associated mineralization: possible implication of apoptosis in the regulation of endochondral ossification. J Bone Miner Res 2003; 18:1430-42. [PMID: 12929932 PMCID: PMC2071932 DOI: 10.1359/jbmr.2003.18.8.1430] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
UNLABELLED Involvement of Pi and Ca in chondrocyte maturation was studied because their levels increase in cartilage growth plate. In vitro results showed that Pi increases type X collagen expression, and together with Ca, induces apoptosis-associated mineralization, which is similar to that analyzed in vivo, thus suggesting a role for both ions and apoptosis during endochondral ossification. INTRODUCTION During endochondral ossification, regulation of chondrocyte maturation governs the growth of the cartilage plate. The role of inorganic phosphate (Pi), whose levels strongly increase in the hypertrophic zone of the growth plate both in intra- and extracellular compartments, on chondrocyte maturation and mineralization of the extracellular matrix has not yet been deciphered. MATERIALS AND METHODS The murine chondrogenic cell line ATDC5 was used. Various Pi and calcium concentrations were obtained by adding NaH2PO4/Na2HPO4 and CaCl2, respectively. Mineralization was investigated by measuring calcium content in cell layer by atomic absorption spectroscopy and by analyzing crystals with transmission electron microscopy and Fourier transform infrared microspectroscopy. Cell differentiation was investigated at the mRNA level (reverse transcriptase-polymerase chain reaction [RT-PCR] analysis). Cell viability was assessed by methyl tetrazolium salt (MTS) assay and staining with cell tracker green (CTG) and ethidium homodimer-(EthD-1). Apoptosis was evidenced by DNA fragmentation and caspase activation observed in confocal microscopy, as well as Bcl-2/Bax mRNA ratio (RT-PCR analysis). RESULTS We showed that Pi increases expression of the hypertrophic marker, type X collagen. When calcium concentration is slightly increased (like in cartilage growth plate), Pi also induces matrix mineralization that seems identical to that observed in murine growth plate cartilage and stimulates apoptosis of differentiated ATDC5 cells, with a decrease in Bcl-2/Bax mRNA ratio, DNA fragmentation, characteristic morphological features, and caspase-3 activation. In addition, the use of a competitive inhibitor of phosphate transport showed that these effects are likely dependent on Pi entry into cells through phosphate transporters. Finally, inhibition of apoptosis with ZVAD-fmk reduces pi-induced mineralization. CONCLUSIONS These findings suggest that Pi regulates chondrocyte maturation and apoptosis-associated mineralization, highlighting a possible role for Pi in the control of skeletal development.
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Affiliation(s)
- David Magne
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Gilles Bluteau
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Corinne Faucheux
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Gaby Palmer
- Division of Rheumatology
University HospitalGeneva,CH
| | - Caroline Vignes-Colombeix
- IFR thérapeutique de Nantes
INSERM : IFR26 CHU NantesUniversité de NantesFaculte de Medecine BORDEAUX
1, Rue Gaston Veil
44035 NANTES CEDEX 1,FR
| | - Paul Pilet
- Centre de microscopie électronique
Nantes,FR
| | - Thierry Rouillon
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | | | - Pierre Weiss
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Guy Daculsi
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Jérôme Guicheux
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
- * Correspondence should be adressed to: Jérôme Guicheux .
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Kirkham J, Brookes SJ, Shore RC, Wood SR, Smith D, Zhang J, Chen H, Robinson C. Physico-chemical properties of crystal surfaces in matrix–mineral interactions during mammalian biomineralisation. Curr Opin Colloid Interface Sci 2002. [DOI: 10.1016/s1359-0294(02)00017-1] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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