1
|
Nanda R, Hazan S, Sauer K, Aladin V, Keinan-Adamsky K, Corzilius B, Shahar R, Zaslansky P, Goobes G. Molecular differences in collagen organization and in organic-inorganic interfacial structure of bones with and without osteocytes. Acta Biomater 2022; 144:195-209. [PMID: 35331939 DOI: 10.1016/j.actbio.2022.03.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 03/10/2022] [Accepted: 03/17/2022] [Indexed: 12/22/2022]
Abstract
Bone is a fascinating biomaterial composed mostly of type-I collagen fibers as an organic phase, apatite as an inorganic phase, and water molecules residing at the interfaces between these phases. They are hierarchically organized with minor constituents such as non-collagenous proteins, citrate ions and glycosaminoglycans into a composite structure that is mechanically durable yet contains enough porosity to accommodate cells and blood vessels. The nanometer scale organization of the collagen fibrous structure and the mineral constituents in bone were recently extensively scrutinized. However, molecular details at the lowest hierarchical level still need to be unraveled to better understand the exact atomic-level arrangement of all these important components in the context of the integral structure of the bone. In this report, we unfold some of the molecular characteristics differentiating between two load-bearing (cleithrum) bones, one from sturgeon fish, where the matrix contains osteocytes and one from pike fish where the bone tissue is devoid of these bone cells. Using enhanced solid-state NMR measurements, we underpin disparities in the collagen fibril structure and dynamics, the mineral phases, the citrate content at the organic-inorganic interface and water penetrability in the two bones. These findings suggest that different strategies are undertaken in the erection of the mineral-organic interfaces in various bones characterized by dissimilar osteogenesis or remodeling pathways and may have implications for the mechanical properties of the particular bone. STATEMENT OF SIGNIFICANCE: Bone boasts unique interactions between collagen fibers and mineral phases through interfaces holding together this bio-composite structure. Over evolution, fish have gone from mineralizing their bones aided by certain bone cells called osteocytes, like tetrapod, to mineralization without these cells. Here, we report atomic level differences in collagen fiber cross linking and organization, porosity of the mineral phases and content of citrate molecules at the bio-mineral interface in bones from modern versus ancient fish. The dissimilar structural features may suggest disparate mechanical properties for the two bones. Fundamental level understanding of the organic and inorganic components in bone and the interfacial interactions holding them together is essential for successful bone repair and for treating better tissue pathologies.
Collapse
|
2
|
Zhang M, Liu J, Zhu T, Le H, Wang X, Guo J, Liu G, Ding J. Functional Macromolecular Adhesives for Bone Fracture Healing. ACS APPLIED MATERIALS & INTERFACES 2022; 14:1-19. [PMID: 34939784 DOI: 10.1021/acsami.1c17434] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Compared with traditional internal fixation devices, bone adhesives are expected to exhibit remarkable advantages, such as improved fixation of comminuted fractures and maintained spatial location of fractured scattered bone pieces in treating bone injuries. In this review, different bone adhesives are summarized from the aspects of bone tissue engineering, and the applications of bone adhesives are emphasized. The concepts of "liquid scaffold" and "liquid plate" are proposed to summarize two different research directions of bone adhesives. Furthermore, significant advances of bone adhesives in recent years in mechanical strength, osseointegration, osteoconductivity, and osteoinductivity are discussed. We conclude this topic by providing perspectives on the state-of-the-art research progress and future development trends of bone adhesives. We hope this review will provide a comprehensive summary of bone adhesives and inspire more extensive and in-depth research on this subject.
Collapse
Affiliation(s)
- Mingran Zhang
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun 130033, People's Republic of China
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
| | - Jiaxue Liu
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
- Jilin Collaborative Innovation Center for Antibody Engineering, Jilin Medical University, 5 Jilin Street, Jilin 132000, People's Republic of China
| | - Tongtong Zhu
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun 130033, People's Republic of China
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
| | - Hanxiang Le
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
- Orthopaedic Medical Center, The Second Hospital of Jilin University, 218 Ziqiang Street, Changchun 130041, People's Republic of China
| | - Xukai Wang
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun 130033, People's Republic of China
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
| | - Jinshan Guo
- Department of Histology and Embryology, School of Basic Medical Sciences; Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, 1023 Southern Shatai Road, Guangzhou 510515, People's Republic of China
| | - Guangyao Liu
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun 130033, People's Republic of China
| | - Jianxun Ding
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
| |
Collapse
|
3
|
Gelli R, Di Pompo G, Graziani G, Avnet S, Baldini N, Baglioni P, Ridi F. Unravelling the Effect of Citrate on the Features and Biocompatibility of Magnesium Phosphate-Based Bone Cements. ACS Biomater Sci Eng 2020; 6:5538-5548. [PMID: 33320576 PMCID: PMC8011797 DOI: 10.1021/acsbiomaterials.0c00983] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
In
the framework of new materials for orthopedic applications,
Magnesium Phosphate-based Cements (MPCs) are currently the focus of
active research in biomedicine, given their promising features; in
this field, the loading of MPCs with active molecules to be released
in the proximity of newly forming bone could represent an innovative
approach to enhance the in vivo performances of the biomaterial. In
this work, we describe the preparation and characterization of MPCs
containing citrate, an ion naturally present in bone which presents
beneficial effects when released in the proximity of newly forming
bone tissue. The cements were characterized in terms of handling properties,
setting time, mechanical properties, crystallinity, and microstructure,
so as to unravel the effect of citrate concentration on the features
of the material. Upon incubation in aqueous media, we demonstrated
that citrate could be successfully released from the cements, while
contributing to the alkalinization of the surroundings. The cytotoxicity
of the materials toward human fibroblasts was also tested, revealing
the importance of a fine modulation of released citrate to guarantee
the biocompatibility of the material.
Collapse
Affiliation(s)
- Rita Gelli
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - Gemma Di Pompo
- BST Biomedical Science and Technologies Lab, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Gabriela Graziani
- Laboratory of Nanobiotechnology (NaBi), IRCSS Istituto Ortopedico Rizzoli, via di Barbiano 1/10, 40136 Bologna, Italy
| | - Sofia Avnet
- BST Biomedical Science and Technologies Lab, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Nicola Baldini
- BST Biomedical Science and Technologies Lab, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy.,Department of Biomedical and Neuromotor Sciences, University of Bologna, 40127 Bologna, Italy
| | - Piero Baglioni
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - Francesca Ridi
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| |
Collapse
|
4
|
He Y, Li Q, Ma C, Xie D, Li L, Zhao Y, Shan D, Chomos SK, Dong C, Tierney JW, Sun L, Lu D, Gui L, Yang J. Development of osteopromotive poly (octamethylene citrate glycerophosphate) for enhanced bone regeneration. Acta Biomater 2019; 93:180-191. [PMID: 30926580 DOI: 10.1016/j.actbio.2019.03.050] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 03/05/2019] [Accepted: 03/23/2019] [Indexed: 10/27/2022]
Abstract
The design and development of bioactive materials that are inherently conducive for osteointegration and bone regeneration with tunable mechanical properties and degradation remains a challenge. Herein, we report the development of a new class of citrate-based materials with glycerophosphate salts, β-glycerophosphate disodium (β-GP-Na) and glycerophosphate calcium (GP-Ca), incorporated through a simple and convenient one-pot condensation reaction, which might address the above challenge in the search of suitable orthopedic biomaterials. Tensile strength of the resultant poly (octamethylene citrate glycerophosphate), POC-βGP-Na and POC-GP-Ca, was as high as 28.2 ± 2.44 MPa and 22.76 ± 1.06 MPa, respectively. The initial modulus ranged from 5.28 ± 0.56 MPa to 256.44 ± 22.88 MPa. The mechanical properties and degradation rate of POC-GP could be controlled by varying the type of salts, and the feeding ratio of salts introduced. Particularly, POC-GP-Ca demonstrated better cytocompatibility and the corresponding composite POC-GP-Ca/hydroxyapatite (HA) also elicited improved osteogenic differentiation of human mesenchymal stem cells (hMSCs) in vitro, as compared to POC-βGP-Na/HA and POC/HA. The superior in-vivo performance of POC-GP-Ca/HA microparticle scaffolds in promoting bone regeneration over POC-βGP-Na/HA and POC/HA was further confirmed in a rabbit femoral condyle defect model. Taken together, the tunability of mechanical properties and degradation rates, together with the osteopromotive nature of POC-GP polymers make these materials, especially POC-GP-Ca well suited for bone tissue engineering applications. STATEMENT OF SIGNIFICANCE: The design and development of bioactive materials that are inherently conducive for osteointegration and bone regeneration with tunable mechanical properties and degradation remains a challenge. Herein, we report the development of a new class of citrate-based materials with glycerophosphate salts, β-glycerophosphate disodium (β-GPNa) and glycerophosphate calcium (GPCa), incorporated through a simple and convenient one-pot condensation reaction. The resultant POC-GP polymers showed significantly improved mechanical property and tunable degradation rate. Within the formulation investigated, POC-GPCa/HA composite further demonstrated better bioactivity in favoring osteogenic differentiation of hMSCs in vitro and promoted bone regeneration in rabbit femoral condyle defects. The development of POC-GP expands the repertoire of the well-recognized citrate-based biomaterials to meet the ever-increasing needs for functional biomaterials in tissue engineering and other biomedical applications.
Collapse
|
5
|
Wang S, Xu C, Yu S, Wu X, Jie Z, Dai H. Citric acid enhances the physical properties, cytocompatibility and osteogenesis of magnesium calcium phosphate cement. J Mech Behav Biomed Mater 2019; 94:42-50. [DOI: 10.1016/j.jmbbm.2019.02.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 02/22/2019] [Accepted: 02/25/2019] [Indexed: 10/27/2022]
|
6
|
Iafisco M, Degli Esposti L, Ramírez-Rodríguez GB, Carella F, Gómez-Morales J, Ionescu AC, Brambilla E, Tampieri A, Delgado-López JM. Fluoride-doped amorphous calcium phosphate nanoparticles as a promising biomimetic material for dental remineralization. Sci Rep 2018; 8:17016. [PMID: 30451901 PMCID: PMC6242929 DOI: 10.1038/s41598-018-35258-x] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 10/29/2018] [Indexed: 11/09/2022] Open
Abstract
Demineralization of dental hard tissue is a widespread problem and the main responsible for dental caries and dentin hypersensitivity. The most promising strategies to induce the precipitation of new mineral phase are the application of materials releasing gradually Ca2+ and PO43- ions or mimicking the mineral phase of the host tissue. However, the design of formulations covering both processes is so far a challenge in preventive dentistry. In this work, we have synthesized innovative biomimetic amorphous calcium phosphate (ACP), which has been, for the first time, doped with fluoride ions (FACP) to obtain materials with enhanced anti-caries and remineralizing properties. Significantly, the doping with fluoride (F) did not vary the physico-chemical features of ACP but resulted in a faster conversion to the crystalline apatite phase in water, as observed by in-situ time-dependent Raman experiments. The efficacy of the as synthesized ACP and FACP samples to occlude dentinal tubules and induce enamel remineralization has been tested in vitro in human molar teeth. The samples showed good ability to partially occlude the tubules of acid-etched dentin and to restore demineralized enamel into its native structure. Results demonstrate that ACP and FACP are promising biomimetic materials in preventive dentistry to hinder demineralization of dental hard tissues.
Collapse
Affiliation(s)
- Michele Iafisco
- Institute of Science and Technology for Ceramics (ISTEC), National Research Council (CNR), Via Granarolo 64, 48018, Faenza, Italy.
| | - Lorenzo Degli Esposti
- Institute of Science and Technology for Ceramics (ISTEC), National Research Council (CNR), Via Granarolo 64, 48018, Faenza, Italy
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/a, 43124, Parma, Italy
| | | | - Francesca Carella
- Institute of Science and Technology for Ceramics (ISTEC), National Research Council (CNR), Via Granarolo 64, 48018, Faenza, Italy
| | - Jaime Gómez-Morales
- Laboratorio de Estudios Cristalográficos, Instituto Andaluz de Ciencias de la Tierra, IACT (CSIC-UGR), Av. Las Palmeras 4, 18100, Armilla, Spain
| | - Andrei Cristian Ionescu
- Oral Microbiology Laboratory, Galeazzi Orthopedic Institute, Department of Biomedical, Surgical and Dental sciences, University of Milan, Via Pascal, 36, 20133, Milan, Italy
| | - Eugenio Brambilla
- Oral Microbiology Laboratory, Galeazzi Orthopedic Institute, Department of Biomedical, Surgical and Dental sciences, University of Milan, Via Pascal, 36, 20133, Milan, Italy
| | - Anna Tampieri
- Institute of Science and Technology for Ceramics (ISTEC), National Research Council (CNR), Via Granarolo 64, 48018, Faenza, Italy
| | - José Manuel Delgado-López
- Departamento de Química Inorgánica, Universidad de Granada, Av. Fuente Nueva, s/n, 18071, Granada, Spain.
| |
Collapse
|
7
|
Ma C, Gerhard E, Lu D, Yang J. Citrate chemistry and biology for biomaterials design. Biomaterials 2018; 178:383-400. [PMID: 29759730 DOI: 10.1016/j.biomaterials.2018.05.003] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 04/17/2018] [Accepted: 05/03/2018] [Indexed: 12/18/2022]
Abstract
Leveraging the multifunctional nature of citrate in chemistry and inspired by its important role in biological tissues, a class of highly versatile and functional citrate-based materials (CBBs) has been developed via facile and cost-effective polycondensation. CBBs exhibiting tunable mechanical properties and degradation rates, together with excellent biocompatibility and processability, have been successfully applied in vitro and in vivo for applications ranging from soft to hard tissue regeneration, as well as for nanomedicine designs. We summarize in the review, chemistry considerations for CBBs design to tune polymer properties and to introduce functionality with a focus on the most recent advances, biological functions of citrate in native tissues with the new notion of degradation products as cell modulator highlighted, and the applications of CBBs in wound healing, nanomedicine, orthopedic, cardiovascular, nerve and bladder tissue engineering. Given the expansive evidence for citrate's potential in biology and biomaterial science outlined in this review, it is expected that citrate based materials will continue to play an important role in regenerative engineering.
Collapse
Affiliation(s)
- Chuying Ma
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, 16801, PA, USA
| | - Ethan Gerhard
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, 16801, PA, USA
| | - Di Lu
- Rehabilitation Engineering Research Laboratory, Biomedicine Engineering Research Centre Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Jian Yang
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, 16801, PA, USA.
| |
Collapse
|
8
|
Wahid MNA, Abd Razak SI, Abdul Kadir MR, Hassan R, Nayan NHM, Mat Amin KA. Influence of citric acid on the physical and biomineralization ability of freeze/thaw poly(vinyl alcohol) hydrogel. J Biomater Appl 2018; 33:94-102. [DOI: 10.1177/0885328218771195] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This work reports the modification of freeze/thaw poly(vinyl alcohol) hydrogel using citric acid as the bioactive molecule for hydroxyapatite formation in simulated body fluid. Inclusion of 1.3 mM citric acid into the poly(vinyl alcohol) hydrogel showed that the mechanical strength, crystalline phase, functional groups and swelling ability were still intact. Adding citric acid at higher concentrations (1.8 and 2.3 mM), however, resulted in physically poor hydrogels. Presence of 1.3 mM of citric acid showed the growth of porous hydroxyapatite crystals on the poly(vinyl alcohol) surface just after one day of immersion in simulated body fluid. Meanwhile, a fully covered apatite layer on the poly(vinyl alcohol) surface plus the evidence of apatite forming within the hydrogel were observed after soaking for seven days. Gel strength of the soaked poly(vinyl alcohol)/citric acid-1.3 mM hydrogel revealed that the load resistance was enhanced compared to that of the neat poly(vinyl alcohol) hydrogel. This facile method of inducing rapid growth of hydroxyapatite on the hydrogel surface as well as within the hydrogel network can be useful for guided bone regenerative materials.
Collapse
Affiliation(s)
| | - Saiful Izwan Abd Razak
- Centre for Advanced Composite Materials, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia
- Medical Devices and Technology Group, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia
| | - Mohammed Rafiq Abdul Kadir
- Medical Devices and Technology Group, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia
| | - Rozita Hassan
- Orthodontic Unit, School of Dental Science, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | | | - Khairul Anuar Mat Amin
- School of Fundamental Science, Universiti Malaysia Terengganu, Kuala Terengganu, Terengganu, Malaysia
| |
Collapse
|
9
|
Fu X, Li Y, Huang T, Yu Z, Ma K, Yang M, Liu Q, Pan H, Wang H, Wang J, Guan M. Runx2/Osterix and Zinc Uptake Synergize to Orchestrate Osteogenic Differentiation and Citrate Containing Bone Apatite Formation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1700755. [PMID: 29721422 PMCID: PMC5908346 DOI: 10.1002/advs.201700755] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 12/15/2017] [Indexed: 05/28/2023]
Abstract
Citrate is essential to biomineralization of the bone especially as an integral part of apatite nanocomposite. Citrate precipitate of apatite is hypothesized to be derived from mesenchymal stem/stromal cells (MSCs) upon differentiation into mature osteoblasts. Based on 13C-labeled signals identified by solid-state multinuclear magnetic resonance analysis, boosted mitochondrial activity and carbon-source replenishment of tricarboxylic acid cycle intermediates coordinate to feed forward mitochondrial anabolism and deposition of citrate. Moreover, zinc (Zn2+) is identified playing dual functions: (i) Zn2+ influx is influenced by ZIP1 which is regulated by Runx2 and Osterix to form a zinc-Runx2/Osterix-ZIP1 regulation axis promoting osteogenic differentiation; (ii) Zn2+ enhances citrate accumulation and deposition in bone apatite. Furthermore, age-related bone loss is associated with Zn2+ and citrate homeostasis; whereas, restoration of Zn2+ uptake alleviates age-associated declining osteogenic capacity and amount of citrate deposition. Together, these results indicate that citrate is not only a key metabolic intermediate meeting the emerging energy demand of differentiating MSCs but also participates in extracellular matrix mineralization, providing mechanistic insight into Zn2+ homeostasis and bone formation.
Collapse
Affiliation(s)
- Xuekun Fu
- Center for Human Tissues and Organs DegenerationInstitute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongChina
| | - Yunyan Li
- High Magnetic Field Laboratory Key Laboratory of High Magnetic Field and Ion Beam Physical BiologyChinese Academy of SciencesInstitute of Physical Science and Information TechnologyAnhui UniversityHefei230031AnhuiChina
| | - Tongling Huang
- Center for Human Tissues and Organs DegenerationInstitute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongChina
| | - Zhiwu Yu
- High Magnetic Field Laboratory Key Laboratory of High Magnetic Field and Ion Beam Physical BiologyChinese Academy of SciencesInstitute of Physical Science and Information TechnologyAnhui UniversityHefei230031AnhuiChina
| | - Kun Ma
- High Magnetic Field Laboratory Key Laboratory of High Magnetic Field and Ion Beam Physical BiologyChinese Academy of SciencesInstitute of Physical Science and Information TechnologyAnhui UniversityHefei230031AnhuiChina
| | - Meng Yang
- Center for Human Tissues and Organs DegenerationInstitute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongChina
| | - Qingli Liu
- Center for Human Tissues and Organs DegenerationInstitute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongChina
| | - Haobo Pan
- Center for Human Tissues and Organs DegenerationInstitute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongChina
| | - Huaiyu Wang
- Center for Biomedical Materials and InterfacesInstitute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongChina
| | - Junfeng Wang
- High Magnetic Field Laboratory Key Laboratory of High Magnetic Field and Ion Beam Physical BiologyChinese Academy of SciencesInstitute of Physical Science and Information TechnologyAnhui UniversityHefei230031AnhuiChina
| | - Min Guan
- Center for Human Tissues and Organs DegenerationInstitute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongChina
| |
Collapse
|
10
|
Chemical crosslinking of biopolymeric scaffolds: Current knowledge and future directions of crosslinked engineered bone scaffolds. Int J Biol Macromol 2018; 107:678-688. [DOI: 10.1016/j.ijbiomac.2017.08.184] [Citation(s) in RCA: 207] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 08/24/2017] [Accepted: 08/31/2017] [Indexed: 11/20/2022]
|
11
|
Irizarry AR, Yan G, Zeng Q, Lucchesi J, Hamang MJ, Ma YL, Rong JX. Defective enamel and bone development in sodium-dependent citrate transporter (NaCT) Slc13a5 deficient mice. PLoS One 2017; 12:e0175465. [PMID: 28406943 PMCID: PMC5391028 DOI: 10.1371/journal.pone.0175465] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 03/27/2017] [Indexed: 01/08/2023] Open
Abstract
There has been growing recognition of the essential roles of citrate in biomechanical properties of mineralized tissues, including teeth and bone. However, the sources of citrate in these tissues have not been well defined, and the contribution of citrate to the regulation of odontogenesis and osteogenesis has not been examined. Here, tooth and bone phenotypes were examined in sodium-dependent citrate transporter (NaCT) Slc13a5 deficient C57BL/6 mice at 13 and 32 weeks of age. Slc13a5 deficiency led to defective tooth development, characterized by absence of mature enamel, formation of aberrant enamel matrix, and dysplasia and hyperplasia of the enamel organ epithelium that progressed with age. These abnormalities were associated with fragile teeth with a possible predisposition to tooth abscesses. The lack of mature enamel was consistent with amelogenesis imperfecta. Furthermore, Slc13a5 deficiency led to decreased bone mineral density and impaired bone formation in 13-week-old mice but not in older mice. The findings revealed the potentially important role of citrate and Slc13a5 in the development and function of teeth and bone.
Collapse
Affiliation(s)
- Armando R. Irizarry
- Department of Pathology, Lilly Research Laboratories, Eli Lilly & Company, Indianapolis, IN, United States of America
- * E-mail: (JXR); (ARI)
| | - Guirui Yan
- Lilly China R&D Center, Eli Lilly & Company, Building 8, No. 338, Zhangjiang Hi-Tech Park, Shanghai, People’s Republic of China
| | - Qingqiang Zeng
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly & Company, Indianapolis, IN, United States of America
| | - Jonathan Lucchesi
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly & Company, Indianapolis, IN, United States of America
| | - Matthew J. Hamang
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly & Company, Indianapolis, IN, United States of America
| | - Yanfei L. Ma
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly & Company, Indianapolis, IN, United States of America
| | - James Xiaojun Rong
- Lilly China R&D Center, Eli Lilly & Company, Building 8, No. 338, Zhangjiang Hi-Tech Park, Shanghai, People’s Republic of China
- * E-mail: (JXR); (ARI)
| |
Collapse
|
12
|
Delgado-López JM, Bertolotti F, Lyngsø J, Pedersen JS, Cervellino A, Masciocchi N, Guagliardi A. The synergic role of collagen and citrate in stabilizing amorphous calcium phosphate precursors with platy morphology. Acta Biomater 2017; 49:555-562. [PMID: 27872013 DOI: 10.1016/j.actbio.2016.11.041] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 10/19/2016] [Accepted: 11/17/2016] [Indexed: 10/20/2022]
Abstract
Bioinspired in vitro collagen mineralization experiments have been performed in the presence of citrate and the combined role of the two bone organic matrix components in controlling mineral formation was investigated for the first time. Mineralized and non-mineralized collagen fibrils have been in depth characterized by combining small- and wide-angle X-ray scattering (SAXS/WAXS) techniques with Atomic Force Microscopy (AFM) imaging. A synergic effect of collagen and citrate in driving the formation of long-term stable amorphous calcium phosphate (ACP) nanoparticles with platy morphology was found. AFM images on mineralized collagen fibrils revealed that some of the ACP nanoparticles were deposited on the intramolecular nanoscopic holes of collagen fibrils. STATEMENT OF SIGNIFICANCE Citrate is an important component of the bone organic matrix but its specific role in bone mineralization is presently unclear. In this work, bioinspired in vitro collagen mineralization experiments in the presence of citrate have been carried out and the combined role of collagen and citrate in controlling mineral formation has been addressed for the first time. Through X-ray scattering and Atomic Force Microscopy characterizations on mineralized and non-mineralized collagen fibrils, we have found that citrate in synergy with collagen stabilizes an amorphous calcium phosphate (ACP) phase with platy morphology over one week and controls its deposition on collagen fibrils.
Collapse
|
13
|
Wang Z, Xu Z, Zhao W, Chen W, Miyoshi T, Sahai N. Isoexergonic Conformations of Surface-Bound Citrate Regulated Bioinspired Apatite Nanocrystal Growth. ACS APPLIED MATERIALS & INTERFACES 2016; 8:28116-28123. [PMID: 27593160 DOI: 10.1021/acsami.6b04822] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The superior biomechanical properties of bone and dentin are dictated, in part, by the unique plate-like morphology of hydroxyapatite (HAP) nanocrysals within a hierarchically assembled collagen matrix. Understanding the mechanism of crystal growth and thus morphology is important to the rational design of bioinspired apatite nanocrystals for orthopedic and dental applications. Citrate has long been proposed to modulate apatite crystal growth, but major questions exist regarding the HAP-bound citrate conformations and the identities of the interacting functional groups and HAP surface sites. Here, we conducted a comprehensive investigation of the mechanism from the angstrom to submicrometer scale by detailed correlation of the results of high-level metadynamics simulations, employing force-fields benchmarked to experiment and density functional theory calculations with the results of high resolution transmission electron microscopy, nuclear magnetic resonance spectroscopy, solution analysis, and thermogravimetric analysis. Crystal morphology changed from needle- to plate-like with increasing citrate concentration. Citrate adsorbed more strongly on the HAP (100) face than on the (001) face, thus resulting in preferential growth in the [001] direction and the plate-like morphology. Two very different bound conformations were obtained, involving interactions of either one or both terminal carboxyl groups with three or five surface calcium ions, respectively, and a hydrogen bond between the citrate hydroxyl and the HAP surface. Remarkably, despite fewer interaction sites in the single bound carboxyl conformation, the structures were isoexergonic, so both exist at equilibrium. Identification of the former conformation is significant because it allows a greater adsorption density than is traditionally assumed and can help explain concentration-dependence of citrate in modulating crystal morphology. These unique results were enabled first by the application of advanced metadynamics, a technique necessary for the accurate simulation of ionic materials but which is rarely employed in the biomaterials and biomineralization fields and second by the detailed correlation of computational, spectroscopic, and analytical results.
Collapse
Affiliation(s)
- Ziqiu Wang
- Department of Polymer Science, University of Akron , 170 University Avenue, Akron, Ohio 44325-3909, United States
| | - Zhijun Xu
- Department of Polymer Science, University of Akron , 170 University Avenue, Akron, Ohio 44325-3909, United States
- College of Chemical Engineering, Nanjing Tech University , Nanjing 210009, China
| | - Weilong Zhao
- Department of Polymer Science, University of Akron , 170 University Avenue, Akron, Ohio 44325-3909, United States
| | - Wei Chen
- Department of Polymer Science, University of Akron , 170 University Avenue, Akron, Ohio 44325-3909, United States
- State Key Lab of Pollution Control and Resource Reuse Study, College of Environmental Science and Engineering, Tongji University , Shanghai 200092, China
| | - Toshikazu Miyoshi
- Department of Polymer Science, University of Akron , 170 University Avenue, Akron, Ohio 44325-3909, United States
| | - Nita Sahai
- Department of Polymer Science, University of Akron , 170 University Avenue, Akron, Ohio 44325-3909, United States
- College of Chemical Engineering, Nanjing Tech University , Nanjing 210009, China
| |
Collapse
|
14
|
Chatzipanagis K, Iafisco M, Roncal-Herrero T, Bilton M, Tampieri A, Kröger R, Delgado-López JM. Crystallization of citrate-stabilized amorphous calcium phosphate to nanocrystalline apatite: a surface-mediated transformation. CrystEngComm 2016. [DOI: 10.1039/c6ce00521g] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Xie D, Guo J, Mehdizadeh M, Tran RT, Chen R, Sun D, Qian G, Jin D, Bai X, Yang J. Development of Injectable Citrate-Based Bioadhesive Bone Implants. J Mater Chem B 2015; 3:387-398. [PMID: 25580247 PMCID: PMC4286886 DOI: 10.1039/c4tb01498g] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Injectable bone implants have been widely used in bone tissue repairs including the treatment of comminuted bone fractures (CBF). However, most injectable bone implants are not suitable for the treatment of CBF due to their weak tissue adhesion strengths and minimal osteoinduction. Citrate has been recently reported to promote bone formation through enhanced bioceramic integration and osteoinductivity. Herein, a novel injectable citrate-based mussel-inspired bioadhesive hydroxyapatite (iCMBA/HA) bone substitute was developed for CBF treatment. iCMBA/HA can be set within 2-4 minutes and the as-prepared (wet) iCMBA/HA possess low swelling ratios, compressive mechanical strengths of up to 3.2±0.27 MPa, complete degradation in 30 days, suitable biocompatibility, and osteoinductivity. This is also the first time to demonstrate that citrate supplementation in osteogenic medium and citrate released from iCMBA/HA degradation can promote the mineralization of osteoblastic committed human mesenchymal stem cells (hMSCs). In vivo evaluation of iCMBA/HA in a rabbit comminuted radial fracture model showed significantly increased bone formation with markedly enhanced three-point bending strength compared to the negative control. Neovascularization and bone ingrowth as well as highly organized bone formation were also observed showing the potential of iCMBA/HA in treating CBF.
Collapse
Affiliation(s)
- Denghui Xie
- Department of Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University; Academy of Orthopedics, Guangdong Province; Biology Department, Southern Medical University, Guangzhou, 510515, China ; Department of Biomedical Engineering, Materials Research Institutes, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park 16802, USA
| | - Jinshan Guo
- Department of Biomedical Engineering, Materials Research Institutes, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park 16802, USA
| | - Mohammadreza Mehdizadeh
- Department of Biomedical Engineering, Materials Research Institutes, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park 16802, USA
| | - Richard T Tran
- Department of Biomedical Engineering, Materials Research Institutes, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park 16802, USA
| | - Ruisong Chen
- Department of Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University; Academy of Orthopedics, Guangdong Province; Biology Department, Southern Medical University, Guangzhou, 510515, China
| | - Dawei Sun
- Department of Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University; Academy of Orthopedics, Guangdong Province; Biology Department, Southern Medical University, Guangzhou, 510515, China
| | - Guoying Qian
- Department of Biology, College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Dadi Jin
- Department of Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University; Academy of Orthopedics, Guangdong Province; Biology Department, Southern Medical University, Guangzhou, 510515, China
| | - Xiaochun Bai
- Department of Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University; Academy of Orthopedics, Guangdong Province; Biology Department, Southern Medical University, Guangzhou, 510515, China
| | - Jian Yang
- Department of Orthopedic Surgery, The Third Affiliated Hospital of Southern Medical University; Academy of Orthopedics, Guangdong Province; Biology Department, Southern Medical University, Guangzhou, 510515, China ; Department of Biomedical Engineering, Materials Research Institutes, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park 16802, USA
| |
Collapse
|
16
|
Sun D, Chen Y, Tran RT, Xu S, Xie D, Jia C, Wang Y, Guo Y, Zhang Z, Guo J, Yang J, Jin D, Bai X. Citric acid-based hydroxyapatite composite scaffolds enhance calvarial regeneration. Sci Rep 2014; 4:6912. [PMID: 25372769 PMCID: PMC4220725 DOI: 10.1038/srep06912] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 10/15/2014] [Indexed: 12/17/2022] Open
Abstract
Citric acid-based polymer/hydroxyapatite composites (CABP-HAs) are a novel class of biomimetic composites that have recently attracted significant attention in tissue engineering. The objective of this study was to compare the efficacy of using two different CABP-HAs, poly (1,8-octanediol citrate)-click-HA (POC-Click-HA) and crosslinked urethane-doped polyester-HA (CUPE-HA) as an alternative to autologous tissue grafts in the repair of skeletal defects. CABP-HA disc-shaped scaffolds (65 wt.-% HA with 70% porosity) were used as bare implants without the addition of growth factors or cells to renovate 4 mm diameter rat calvarial defects (n = 72, n = 18 per group). Defects were either left empty (negative control group), or treated with CUPE-HA scaffolds, POC-Click-HA scaffolds, or autologous bone grafts (AB group). Radiological and histological data showed a significant enhancement of osteogenesis in defects treated with CUPE-HA scaffolds when compared to POC-Click-HA scaffolds. Both, POC-Click-HA and CUPE-HA scaffolds, resulted in enhanced bone mineral density, trabecular thickness, and angiogenesis when compared to the control groups at 1, 3, and 6 months post-trauma. These results show the potential of CABP-HA bare implants as biocompatible, osteogenic, and off-shelf-available options in the repair of orthopedic defects.
Collapse
Affiliation(s)
- Dawei Sun
- 1] Academy of Orthopedics, Guangdong Province, Department of Orthopedics, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510665, China [2] Department of Orthopaedics &Microsurgery, Guangdong No. 2 Provincial People's Hospital, Guangzhou, 510317, China
| | - Yuhui Chen
- Academy of Orthopedics, Guangdong Province, Department of Orthopedics, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510665, China
| | - Richard T Tran
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, 16802, U.S.A
| | - Song Xu
- 1] Academy of Orthopedics, Guangdong Province, Department of Orthopedics, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510665, China [2] State Key Laboratory of Organ Failure Research, Department of Cell Biology, School of Basic Medical Science, Southern Medical University, Guangzhou, 510515, China
| | - Denghui Xie
- 1] Academy of Orthopedics, Guangdong Province, Department of Orthopedics, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510665, China [2] Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, 16802, U.S.A
| | - Chunhong Jia
- State Key Laboratory of Organ Failure Research, Department of Cell Biology, School of Basic Medical Science, Southern Medical University, Guangzhou, 510515, China
| | - Yuchen Wang
- Academy of Orthopedics, Guangdong Province, Department of Orthopedics, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510665, China
| | - Ying Guo
- Academy of Orthopedics, Guangdong Province, Department of Orthopedics, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510665, China
| | - Zhongmin Zhang
- Academy of Orthopedics, Guangdong Province, Department of Orthopedics, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510665, China
| | - Jinshan Guo
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, 16802, U.S.A
| | - Jian Yang
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, 16802, U.S.A
| | - Dadi Jin
- Academy of Orthopedics, Guangdong Province, Department of Orthopedics, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510665, China
| | - Xiaochun Bai
- 1] Academy of Orthopedics, Guangdong Province, Department of Orthopedics, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510665, China [2] State Key Laboratory of Organ Failure Research, Department of Cell Biology, School of Basic Medical Science, Southern Medical University, Guangzhou, 510515, China
| |
Collapse
|
17
|
Guo Y, Tran RT, Xie D, Wang Y, Nguyen DY, Gerhard E, Guo J, Tang J, Zhang Z, Bai X, Yang J. Citrate-based biphasic scaffolds for the repair of large segmental bone defects. J Biomed Mater Res A 2014; 103:772-81. [PMID: 24829094 DOI: 10.1002/jbm.a.35228] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2014] [Revised: 05/05/2014] [Accepted: 05/13/2014] [Indexed: 12/29/2022]
Abstract
Attempts to replicate native tissue architecture have led to the design of biomimetic scaffolds focused on improving functionality. In this study, biomimetic citrate-based poly (octanediol citrate)-click-hydroxyapatite (POC-Click-HA) scaffolds were developed to simultaneously replicate the compositional and architectural properties of native bone tissue while providing immediate structural support for large segmental defects following implantation. Biphasic scaffolds were fabricated with 70% internal phase porosity and various external phase porosities (between 5 and 50%) to mimic the bimodal distribution of cancellous and cortical bone, respectively. Biphasic POC-Click-HA scaffolds displayed compressive strengths up to 37.45 ± 3.83 MPa, which could be controlled through the external phase porosity. The biphasic scaffolds were also evaluated in vivo for the repair of 10-mm long segmental radial defects in rabbits and compared to scaffolds of uniform porosity as well as autologous bone grafts after 5, 10, and 15 weeks of implantation. The results showed that all POC-Click-HA scaffolds exhibited good biocompatibility and extensive osteointegration with host bone tissue. Biphasic scaffolds significantly enhanced new bone formation with higher bone densities in the initial stages after implantation. Biomechanical and histomorphometric analysis supported a similar outcome with biphasic scaffolds providing increased compression strength, interfacial bone ingrowth, and periosteal remodeling in early time points, but were comparable to all experimental groups after 15 weeks. These results confirm the ability of biphasic scaffold architectures to restore bone tissue and physiological functions in the early stages of recovery, and the potential of citrate-based biomaterials in orthopedic applications.
Collapse
Affiliation(s)
- Ying Guo
- Department of Orthopedic, Academy of Orthopedics, Guangdong Province, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510280, China; Department of Cell Biology, School of Basic Medical Science, Southern Medical University, Guangzhou, 510515, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Tran RT, Wang L, Zhang C, Huang M, Tang W, Zhang C, Zhang Z, Jin D, Banik B, Brown JL, Xie Z, Bai X, Yang J. Synthesis and characterization of biomimetic citrate-based biodegradable composites. J Biomed Mater Res A 2013; 102:2521-32. [PMID: 23996976 DOI: 10.1002/jbm.a.34928] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Revised: 08/07/2013] [Accepted: 08/12/2013] [Indexed: 12/27/2022]
Abstract
Natural bone apatite crystals, which mediate the development and regulate the load-bearing function of bone, have recently been associated with strongly bound citrate molecules. However, such understanding has not been translated into bone biomaterial design and osteoblast cell culture. In this work, we have developed a new class of biodegradable, mechanically strong, and biocompatible citrate-based polymer blends (CBPBs), which offer enhanced hydroxyapatite binding to produce more biomimetic composites (CBPBHAs) for orthopedic applications. CBPBHAs consist of the newly developed osteoconductive citrate-presenting biodegradable polymers, crosslinked urethane-doped polyester and poly (octanediol citrate), which can be composited with up to 65 wt % hydroxyapatite. CBPBHA networks produced materials with a compressive strength of 116.23 ± 5.37 MPa comparable to human cortical bone (100-230 MPa), and increased C2C12 osterix gene and alkaline phosphatase gene expression in vitro. The promising results above prompted an investigation on the role of citrate supplementation in culture medium for osteoblast culture, which showed that exogenous citrate supplemented into media accelerated the in vitro phenotype progression of MG-63 osteoblasts. After 6 weeks of implantation in a rabbit lateral femoral condyle defect model, CBPBHA composites elicited minimal fibrous tissue encapsulation and were well integrated with the surrounding bone tissues. The development of citrate-presenting CBPBHA biomaterials and preliminary studies revealing the effects of free exogenous citrate on osteoblast culture shows the potential of citrate biomaterials to bridge the gap in orthopedic biomaterial design and osteoblast cell culture in that the role of citrate molecules has previously been overlooked.
Collapse
Affiliation(s)
- Richard T Tran
- Department of Bioengineering, Materials Research Institute, The Huck Institutes of The Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, 16802
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Gyawali D, Nair P, Kim HKW, Yang J. Citrate-based Biodegradable Injectable hydrogel Composites for Orthopedic Applications. Biomater Sci 2013; 1:52-64. [PMID: 23977427 DOI: 10.1039/c2bm00026a] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Previous studies have confirmed that natural bone apatite crystals are bound with citrate-rich molecules. Citrates on apatite crystals impact bone development and its load-bearing function. However, such understanding has never been translated into bone biomaterials design. Herein, a first citrate-based injectable composite material for orthopedic applications is developed based on our recently developed biodegradable poly(ethylene glycol) maleate citrate (PEGMC) and hydroxyapatite (HA). PEGMC contains rich carboxylic groups that could chelate with calcium-containing HA thus facilitating polymer/HA interactions, similar to natural citrate-bound apatite crystal. The crosslinking of poly(ethylene glycol) diacrylate (PEGDA) with PEGMC/HA composites allows an addition control over degradation and mechanical properties of the crosslinked PEGMC/HA (CPEGMC/HA) composites. CPEGMC/HA composite can serve as an ideal injectable cell carrier as confirmed by the enhanced DNA content, ALP activity, and calcium production through a human fetal osteoblast encapsulation study. Ex vivo study on porcine femoral head demonstrated that PEGMC/HA is a potentially promising injectable biodegradable bone material for the treatment of osteonecrosis of the femoral head. Development of biodegradable citrate-based injectable PEGMC/HA composite is an initial step for the development of the next generation of bone tissue engineering and orthopedic biomaterials.
Collapse
Affiliation(s)
- Dipendra Gyawali
- Department of Bioengineering, The University of Texas at Arlington, Arlington, TX ; Joint Biomedical Engineering Program, The University of Texas Southwestern Medical Center and The University of Texas at Arlington, Dallas, TX 75390
| | | | | | | |
Collapse
|
20
|
Crystallization of bioinspired citrate-functionalized nanoapatite with tailored carbonate content. Acta Biomater 2012; 8:3491-9. [PMID: 22579712 DOI: 10.1016/j.actbio.2012.04.046] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2012] [Revised: 03/26/2012] [Accepted: 04/30/2012] [Indexed: 11/24/2022]
Abstract
Novel citrate-functionalized carbonate-apatite nanoparticles with mean lengths ranging from 20 to 100 nm were synthesized by a thermal-decomplexing batch method. Needle-like and plate-shaped morphologies were obtained in the absence and presence of sodium carbonate in the precipitation medium, respectively. The precipitation time and the presence of sodium carbonate strongly affect the chemical composition as well as the dimensions and the crystallinity of nanoparticles. At a short precipitation time, poorly crystalline apatites of 100 nm mean length with a low degree of carbonation (1.5% w/w, mainly in B-position) and a high citrate content (5.9% w/w) were precipitated. This citrate content is close to that recently measured in bone apatite. When increasing the precipitation time up to 96 h the mean length and the citrate content progressively decrease and at the same time the nanoparticles become more crystalline. They are composed of a well-ordered carbonate-substituted apatitic core embedded in a non-apatitic hydrated layer containing citrate ions. This layer progressively transforms into a more stable apatite domain upon maturation in aqueous media. The nanoparticles displayed excellent compatibility properties in cell biological systems, since they were not cytotoxic to a mouse carcinoma cell line when added to a final concentration of 100 μgml(-1). This work provides new insights into the role of citrate on the crystallization of nanoapatites. Moreover, the synthesized nanoparticles are promising materials for use as nanocarriers for local targeted drug delivery systems as well as building blocks for the preparation of nanostructured scaffolds for cells in bone tissue engineering.
Collapse
|
21
|
Nikel O, Laurencin D, Bonhomme C, Sroga GE, Besdo S, Lorenz A, Vashishth D. Solid state NMR investigation of intact human bone quality: balancing issues and insight into the structure at the organic-mineral interface. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2012; 116:6320-6331. [PMID: 22822414 PMCID: PMC3399594 DOI: 10.1021/jp2125312] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Age-related bone fragility fractures present a significant problem for public health. Measures of bone quality are increasingly recognized to complement the conventional bone mineral density (BMD) based assessment of fracture risk. The ability to probe and understand bone quality at the molecular level is desirable in order to unravel how the structure of organic matrix and its association with mineral contribute to the overall mechanical properties. The (13)C{(31)P} REDOR MAS NMR (Rotational Echo Double Resonance Magic Angle Spinning Nuclear Magnetic Resonance) technique is uniquely suited for the study of the structure of the organic-mineral interface in bone. For the first time, we have applied it successfully to analyze the structure of intact (non-powdered) human cortical bone samples, from young healthy and old osteoporotic donors. Loading problems associated with the rapid rotation of intact bone were solved using a Finite Element Analysis (FEA) approach, and a method allowing osteoporotic samples to be balanced and spun reproducibly is described. REDOR NMR parameters were set to allow insight into the arrangement of the amino acids at the mineral interface to be accessed, and SVD (Singular Value Decomposition) was applied to enhance the signal to noise ratio and enable a better analysis of the data. From the REDOR data, it was found that carbon atoms belonging to citrate/glucosaminoglycans (GAGs) are closest to the mineral surface regardless of age or site. In contrast, the arrangement of the collagen backbone at the interface varied with site and age. The relative proximity of two of the main amino acids in bone matrix proteins, hydroxyproline and alanine, with respect to the mineral phase was analyzed in more detail, and discussed in view of glycation measurements which were carried out on the tissues. Overall, this work shows that the (13)C{(31)P} REDOR NMR approach could be used as a complementary technique to assess a novel aspect of bone quality, the organic-mineral interface structure.
Collapse
Affiliation(s)
- Ondrej Nikel
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
- Institut Charles Gerhardt de Montpellier, UMR 5253, CNRS-UM2-ENSCM-UM1, Université Montpellier 2, Montpellier, France
| | - Danielle Laurencin
- Institut Charles Gerhardt de Montpellier, UMR 5253, CNRS-UM2-ENSCM-UM1, Université Montpellier 2, Montpellier, France
| | - Christian Bonhomme
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR 7574, UPMC Univ. Paris 06, Paris, France
| | - Grażyna E. Sroga
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Silke Besdo
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR 7574, UPMC Univ. Paris 06, Paris, France
| | - Anna Lorenz
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Deepak Vashishth
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
| |
Collapse
|
22
|
Hu YY, Rawal A, Schmidt-Rohr K. Strongly bound citrate stabilizes the apatite nanocrystals in bone. Proc Natl Acad Sci U S A 2010; 107:22425-9. [PMID: 21127269 PMCID: PMC3012505 DOI: 10.1073/pnas.1009219107] [Citation(s) in RCA: 320] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Nanocrystals of apatitic calcium phosphate impart the organic-inorganic nanocomposite in bone with favorable mechanical properties. So far, the factors preventing crystal growth beyond the favorable thickness of ca. 3 nm have not been identified. Here we show that the apatite surfaces are studded with strongly bound citrate molecules, whose signals have been identified unambiguously by multinuclear magnetic resonance (NMR) analysis. NMR reveals that bound citrate accounts for 5.5 wt% of the organic matter in bone and covers apatite at a density of about 1 molecule per (2 nm)(2), with its three carboxylate groups at distances of 0.3 to 0.45 nm from the apatite surface. Bound citrate is highly conserved, being found in fish, avian, and mammalian bone, which indicates its critical role in interfering with crystal thickening and stabilizing the apatite nanocrystals in bone.
Collapse
Affiliation(s)
- Y.-Y. Hu
- Ames Laboratory and Department of Chemistry, Iowa State University, Ames, IA 50011
| | - A. Rawal
- Ames Laboratory and Department of Chemistry, Iowa State University, Ames, IA 50011
| | - K. Schmidt-Rohr
- Ames Laboratory and Department of Chemistry, Iowa State University, Ames, IA 50011
| |
Collapse
|
23
|
How to control the size and morphology of apatite nanocrystals in bone. Proc Natl Acad Sci U S A 2010; 107:22369-70. [PMID: 21169505 DOI: 10.1073/pnas.1017493108] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
|
24
|
Anteby SO, Zukerman H, Gedelia I, Weistreich V. Citric acid in amniotic fluid. THE JOURNAL OF OBSTETRICS AND GYNAECOLOGY OF THE BRITISH COMMONWEALTH 1973; 80:27-8. [PMID: 4696560 DOI: 10.1111/j.1471-0528.1973.tb02125.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
25
|
Abstract
Citrate content was determined in the outer surface enamel of unerupted human teeth. The citrate content of the outer surface enamel of erupted teeth was higher than that of unerupted teeth, suggesting that citrate is absorbed from the oral environment after eruption of the teeth. No inverse correlation was found between the citrate and fluoride content of the surface enamel of erupted teeth.
Collapse
|
26
|
Gedalia I, Zipkin I, Zukerman H, Gat I, Leventhal H. The citrate content of teeth and bones of human foetuses. Arch Oral Biol 1967; 12:545-9. [PMID: 5227883 DOI: 10.1016/0003-9969(67)90029-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|