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Liu W, Huang Z, Chen X, Ding S, Xiang Q, Huang Y, Li H. Human collagen sequence polypeptides mediated biomineralization and its molecular mechanism. J Mech Behav Biomed Mater 2024; 158:106687. [PMID: 39137580 DOI: 10.1016/j.jmbbm.2024.106687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 08/06/2024] [Accepted: 08/08/2024] [Indexed: 08/15/2024]
Abstract
Biotechnology provides alternatives for regenerative medicine with more controllable functions. Herein, the polypeptides encoded with human collagen I amino-acid sequences were studied for the first time to modulate biomimetic hydroxyapatite (HAP). With a length of 50-100 nm and a width of 20-30 nm, the HAP crystal formed was plate-like. The interaction of the human collagen sequence polypeptide on the (001), (100), and (211) crystal faces of HAP crystal had been studied using Molecular Dynamics (MD) simulations, respectively. Based on MD simulations, van der Waals forces and hydrogen bonds are the main interactions between polypeptides and HAP through the -NH2, -CH2-, -OH, and -COOH, respectively. According to the calculated results, der Waals forces might be the main interaction. The human collagen sequence polypeptides exhibited the highest adsorption energy on the (001) plane of HAP, significantly higher than any of the adsorption energy on the (100) and (211) planes. Therefore, the growth of the (001) would be inhibited, which kept accurate with the result of images from the Transmission Electron Microscope (TEM). Study results provide a basis for rational designing of peptides with human collagen sequences to regenerate hard tissues.
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Affiliation(s)
- Wangzi Liu
- College of Chemistry Materials and Science, Jinan University, Guangzhou, 510632, China; Engineering Research Center of Artificial Organs and Materials, Ministry of Education, Guangzhou, 510632, China
| | - Zhilin Huang
- College of Chemistry Materials and Science, Jinan University, Guangzhou, 510632, China; Engineering Research Center of Artificial Organs and Materials, Ministry of Education, Guangzhou, 510632, China
| | - Xiaohui Chen
- College of Chemistry Materials and Science, Jinan University, Guangzhou, 510632, China; Engineering Research Center of Artificial Organs and Materials, Ministry of Education, Guangzhou, 510632, China
| | - Shan Ding
- College of Chemistry Materials and Science, Jinan University, Guangzhou, 510632, China; Engineering Research Center of Artificial Organs and Materials, Ministry of Education, Guangzhou, 510632, China
| | - Qi Xiang
- Institute of Biomedicine and Guangdong Provincial Key Laboratory of Bioengineering Medicine, Jinan University, Guangzhou, 510632, China
| | - Yadong Huang
- Institute of Biomedicine and Guangdong Provincial Key Laboratory of Bioengineering Medicine, Jinan University, Guangzhou, 510632, China
| | - Hong Li
- College of Chemistry Materials and Science, Jinan University, Guangzhou, 510632, China; Engineering Research Center of Artificial Organs and Materials, Ministry of Education, Guangzhou, 510632, China.
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Dorozhkin SV. Calcium Orthophosphate (CaPO4) Containing Composites for Biomedical Applications: Formulations, Properties, and Applications. JOURNAL OF COMPOSITES SCIENCE 2024; 8:218. [DOI: 10.3390/jcs8060218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
The goal of this review is to present a wide range of hybrid formulations and composites containing calcium orthophosphates (abbreviated as CaPO4) that are suitable for use in biomedical applications and currently on the market. The bioactive, biocompatible, and osteoconductive properties of various CaPO4-based formulations make them valuable in the rapidly developing field of biomedical research, both in vitro and in vivo. Due to the brittleness of CaPO4, it is essential to combine the desired osteologic properties of ceramic CaPO4 with those of other compounds to create novel, multifunctional bone graft biomaterials. Consequently, this analysis offers a thorough overview of the hybrid formulations and CaPO4-based composites that are currently known. To do this, a comprehensive search of the literature on the subject was carried out in all significant databases to extract pertinent papers. There have been many formulations found with different material compositions, production methods, structural and bioactive features, and in vitro and in vivo properties. When these formulations contain additional biofunctional ingredients, such as drugs, proteins, enzymes, or antibacterial agents, they offer improved biomedical applications. Moreover, a lot of these formulations allow cell loading and promote the development of smart formulations based on CaPO4. This evaluation also discusses basic problems and scientific difficulties that call for more investigation and advancements. It also indicates perspectives for the future.
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Affiliation(s)
- Sergey V. Dorozhkin
- Faculty of Physics, M.V. Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russia
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3
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Halder M, Singh A, Negi D, Singh Y. Investigating the Role of Amino Acids in Short Peptides for Hydroxyapatite Binding and Osteogenic Differentiation of Mesenchymal Stem Cells to Aid Bone Regeneration. Biomacromolecules 2024; 25:2286-2301. [PMID: 38502906 DOI: 10.1021/acs.biomac.3c01148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Bone defects show a slow rate of osteoconduction and imperfect reconstruction, and the current treatment strategies to treat bone defects suffer from limitations like immunogenicity, lack of cell adhesion, and the absence of osteogenic activity. In this context, bioactive supramolecular peptides and peptide gels offer unique opportunities to develop biomaterials that can play a dominant role in the biomineralization of bone tissues and promote bone formation. In this article, we have demonstrated the potential of six tetrapeptides for specific binding to hydroxyapatite (HAp), a major inorganic component of the bone, and their effect on the growth and osteogenic differentiation of mesenchymal stem cells (MSCs). We adopted a simplistic approach of rationally designing amphiphilic peptides by incorporating amino acids, Ser, pSer, Pro, Hyp, Asp, and Glu, which are present in either collagenous or noncollagenous proteins and render properties like antioxidant, calcification, and mineralization. A total of six tetrapeptides, Trp-Trp-His-Ser (WWHS), Trp-Trp-His-pSer (WWHJ), Trp-Trp-His-Pro (WWHP), Trp-Trp-His-Hyp (WWHO), Trp-Trp-His-Asp (WWHD), and Trp-Trp-His-Glu (WWHE), were synthesized. Four peptides were found to self-assemble into nanofibrillar gels resembling the extracellular matrix (ECM), and the remaining two peptides (WWHJ, WWHP) self-assembled into nanorods. The peptides showed excellent cell adhesion, encapsulation, proliferation, and migration and induced the differentiation of mesenchymal stem cells (MSCs), as evident from the enhanced mineralization, resulting from the upregulation of osteogenic markers, RUNX 2, COL I, OPN, and OCN, alkaline phosphatase (ALP) production, and calcium deposition. The peptides also induced the downregulation of inflammatory markers, TNF-α and iNOS, and the upregulation of the anti-inflammatory marker, IL-10, resulting in M2 macrophage polarization. RANKL and TRAP genes were downregulated in a coculture system of MC3T3-E1 and RAW 264.7 cells, implying that peptides promote osteogenesis and inhibit osteoclastogenesis. The peptide-based biomaterials developed in this work can enhance bone regeneration capacity and show strong potential as scaffolds for bone tissue engineering.
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Affiliation(s)
- Moumita Halder
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar 140001, Punjab, India
| | - Ananya Singh
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar 140001, Punjab, India
| | - Deepa Negi
- Department of Biomedical Engineering, Indian Institute of Technology Ropar, Rupnagar 140001, Punjab, India
| | - Yashveer Singh
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar 140001, Punjab, India
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4
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Huang Z, Wang C, Chen X, Ding S, Xiang Q, Xie M, Huang Y, Li H. Regulation of recombinant humanized collagen on HAP growth and its molecule simulation. RSC Adv 2023; 13:26031-26040. [PMID: 37664193 PMCID: PMC10472339 DOI: 10.1039/d3ra03810f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/13/2023] [Indexed: 09/05/2023] Open
Abstract
Hydroxyapatite (HAP) in natural bone is formed under the regulation of natural collagen I. Here, we report how recombinant humanized collagen I (rhCol I) regulates the growth of HAP nanocrystals in a long belt shape 100-150 nm in width and 200-300 nm in length. MD simulation results showed that the interactions between rhCol I and the (001), (100), and (211) planes of HAP mainly contributed to the electrostatic force and van der Waals forces via COO⋯Ca, -NH⋯Ca, CH⋯OPO3, and NH⋯OPO3 bonds, respectively. On the (001) plane, the interaction between -COO- and Ca was stronger than on the (100) and (211) planes, resulting in a large electrostatic force, which inhibited the growth of the (001) plane. The lowest energy of adsorption to the (211) plane resulted in the preferential growth of the (211) plane due to the weakest interaction with rhCol I. The detailed correlation between HAP and rhCol I could explain HAP growth under regulation by rhCol I. This study provides a reference for the bio-application of recombinant collagen.
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Affiliation(s)
- Zhilin Huang
- College of Chemistry and Materials Science, Jinan University Guangzhou 510632 China
- Engineering Research Center of Artificial Organs and Materials, Ministry of Education Guangzhou 510632 China
| | - Chucheng Wang
- College of Chemistry and Materials Science, Jinan University Guangzhou 510632 China
- Engineering Research Center of Artificial Organs and Materials, Ministry of Education Guangzhou 510632 China
| | - Xiaohui Chen
- College of Chemistry and Materials Science, Jinan University Guangzhou 510632 China
- Engineering Research Center of Artificial Organs and Materials, Ministry of Education Guangzhou 510632 China
| | - Shan Ding
- College of Chemistry and Materials Science, Jinan University Guangzhou 510632 China
- Engineering Research Center of Artificial Organs and Materials, Ministry of Education Guangzhou 510632 China
| | - Qi Xiang
- Institute of Biomedicine and Guangdong Provincial Key Laboratory of Bioengineering Medicine, Jinan University Guangzhou 510632 China
| | - Mo Xie
- College of Chemistry and Materials Science, Jinan University Guangzhou 510632 China
- Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications Guangzhou 510632 China
| | - Yadong Huang
- Institute of Biomedicine and Guangdong Provincial Key Laboratory of Bioengineering Medicine, Jinan University Guangzhou 510632 China
| | - Hong Li
- College of Chemistry and Materials Science, Jinan University Guangzhou 510632 China
- Engineering Research Center of Artificial Organs and Materials, Ministry of Education Guangzhou 510632 China
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5
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Alizadeh Sahraei A, Azizi D, Mokarizadeh AH, Boffito DC, Larachi F. Emerging Trends of Computational Chemistry and Molecular Modeling in Froth Flotation: A Review. ACS ENGINEERING AU 2023; 3:128-164. [PMID: 37362006 PMCID: PMC10288516 DOI: 10.1021/acsengineeringau.2c00053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 04/04/2023] [Accepted: 04/06/2023] [Indexed: 06/28/2023]
Abstract
Froth flotation is the most versatile process in mineral beneficiation, extensively used to concentrate a wide range of minerals. This process comprises mixtures of more or less liberated minerals, water, air, and various chemical reagents, involving a series of intermingled multiphase physical and chemical phenomena in the aqueous environment. Today's main challenge facing the froth flotation process is to gain atomic-level insights into the properties of its inherent phenomena governing the process performance. While it is often challenging to determine these phenomena via trial-and-error experimentations, molecular modeling approaches not only elicit a deeper understanding of froth flotation but can also assist experimental studies in saving time and budget. Thanks to the rapid development of computer science and advances in high-performance computing (HPC) infrastructures, theoretical/computational chemistry has now matured enough to successfully and gainfully apply to tackle the challenges of complex systems. In mineral processing, however, advanced applications of computational chemistry are increasingly gaining ground and demonstrating merit in addressing these challenges. Accordingly, this contribution aims to encourage mineral scientists, especially those interested in rational reagent design, to become familiarized with the necessary concepts of molecular modeling and to apply similar strategies when studying and tailoring properties at the molecular level. This review also strives to deliver the state-of-the-art integration and application of molecular modeling in froth flotation studies to assist either active researchers in this field to disclose new directions for future research or newcomers to the field to initiate innovative works.
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Affiliation(s)
- Abolfazl Alizadeh Sahraei
- Department
of Chemical Engineering, Université
Laval, 1065 Avenue de la Médecine, Québec, Québec G1V 0A6, Canada
| | - Dariush Azizi
- Department
of Chemical Engineering, École Polytechnique
de Montréal, 2900 Boulevard Édouard-Montpetit, Montréal H3T 1J4, Canada
| | - Abdol Hadi Mokarizadeh
- School
of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Daria Camilla Boffito
- Department
of Chemical Engineering, École Polytechnique
de Montréal, 2900 Boulevard Édouard-Montpetit, Montréal H3T 1J4, Canada
| | - Faïçal Larachi
- Department
of Chemical Engineering, Université
Laval, 1065 Avenue de la Médecine, Québec, Québec G1V 0A6, Canada
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6
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Suzuki O, Hamai R, Sakai S. The material design of octacalcium phosphate bone substitute: increased dissolution and osteogenecity. Acta Biomater 2023; 158:1-11. [PMID: 36581004 DOI: 10.1016/j.actbio.2022.12.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/16/2022] [Accepted: 12/21/2022] [Indexed: 12/29/2022]
Abstract
Octacalcium phosphate (OCP) has been advocated as a precursor of bone apatite crystals. Recent studies have shown that synthetic OCP exhibits highly osteoconductive properties as a bone substitute material that stems from its ability to activate bone tissue-related cells, such as osteoblasts, osteocytes, and osteoclasts. Accumulated experimental evidence supports the proposition that the OCP-apatite phase conversion under physiological conditions increases the stimulatory capacity of OCP. The conversion of OCP progresses by hydrolysis toward Ca-deficient hydroxyapatite with Ca2+ ion incorporation and inorganic phosphate ion release with concomitant increases in the solid Ca/P molar ratio, specific surface area, and serum protein adsorption affinity. The ionic dissolution rate during the hydrolysis reaction was controlled by introducing a high-density edge dislocation within the OCP lattice by preparing it through co-precipitation with gelatin. The enhanced dissolution intensifies the material biodegradation rate and degree of osteogenecity of OCP. Controlling the biodegradation rate relative to the dissolution acceleration may be vital for controlling the osteogenecity of OCP materials. This study investigates the effects of the ionic dissolution of OCP, focusing on the structural defects in OCP, as the enhanced metastability of the OCP phase modulates biodegradability followed by new bone formation. STATEMENT OF SIGNIFICANCE: Octacalcium phosphate (OCP) is recognized as a highly osteoconductive material that is biodegradable by osteoclastic resorption, followed by new bone formation by osteoblasts. However, if the degradation rate of OCP is increased by maintaining the original osteoconductivity or acquiring a bioactivity better than its current properties, then early replacement with new bone can be expected. Although cell introduction or growth factor addition by scaffold materials is the standard method for tissue engineering, material activity can be augmented by introducing dislocations into the lattice of the OCP. This review article summarizes the effects of introducing structural defects on activating OCP, which was obtained by co-precipitation with gelatin, as a bone substitute material and the mechanism of improved bone replacement performance.
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Affiliation(s)
- Osamu Suzuki
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan.
| | - Ryo Hamai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Susumu Sakai
- Division of Craniofacial Function Engineering, Tohoku University Graduate School of Dentistry, 4-1, Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
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7
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Patra S, Kancharlapalli S, Chakraborty A, Singh K, Kumar C, Guleria A, Rakshit S, Damle A, Chakravarty R, Chakraborty S. Chelator-Free Radiolabeling with Theoretical Insights and Preclinical Evaluation of Citrate-Functionalized Hydroxyapatite Nanospheres for Potential Use as Radionanomedicine. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c04378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- Sourav Patra
- Radiopharmaceuticals Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | | | - Avik Chakraborty
- Radiation Medicine Centre, Bhabha Atomic Research Centre, Parel, Mumbai 400012, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Khajan Singh
- Radiopharmaceuticals Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Chandan Kumar
- Radiopharmaceuticals Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Apurav Guleria
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Parel, Mumbai 400012, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Sutapa Rakshit
- Radiation Medicine Centre, Bhabha Atomic Research Centre, Parel, Mumbai 400012, India
| | - Archana Damle
- Radiation Medicine Centre, Bhabha Atomic Research Centre, Parel, Mumbai 400012, India
| | - Rubel Chakravarty
- Radiopharmaceuticals Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Sudipta Chakraborty
- Radiopharmaceuticals Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
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8
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Doyle ME, Dalgarno K, Masoero E, Ferreira AM. Advances in biomimetic collagen mineralisation and future approaches to bone tissue engineering. Biopolymers 2023; 114:e23527. [PMID: 36444710 PMCID: PMC10078151 DOI: 10.1002/bip.23527] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 11/10/2022] [Accepted: 11/11/2022] [Indexed: 11/30/2022]
Abstract
With an ageing world population and ~20% of adults in Europe being affected by bone diseases, there is an urgent need to develop advanced regenerative approaches and biomaterials capable to facilitate tissue regeneration while providing an adequate microenvironment for cells to thrive. As the main components of bone are collagen and apatite mineral, scientists in the tissue engineering field have attempted in combining these materials by using different biomimetic approaches to favour bone repair. Still, an ideal bone analogue capable of mimicking the distinct properties (i.e., mechanical properties, degradation rate, porosity, etc.) of cancellous bone is to be developed. This review seeks to sum up the current understanding of bone tissue mineralisation and structure while providing a critical outlook on the existing biomimetic strategies of mineralising collagen for bone tissue engineering applications, highlighting where gaps in knowledge exist.
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Affiliation(s)
| | - Kenny Dalgarno
- School of EngineeringNewcastle UniversityNewcastle upon TyneUK
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9
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Hydroxyapatite Nanoparticles in Drug Delivery: Physicochemistry and Applications. Pharmaceutics 2021; 13:pharmaceutics13101642. [PMID: 34683935 PMCID: PMC8537309 DOI: 10.3390/pharmaceutics13101642] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/18/2021] [Accepted: 09/21/2021] [Indexed: 11/17/2022] Open
Abstract
Hydroxyapatite (HAP) has been the gold standard in the biomedical field due to its composition and similarity to human bone. Properties such as shape, size, morphology, and ionic substitution can be tailored through the use of different synthesis techniques and compounds. Regardless of the ability to determine its physicochemical properties, a conclusion for the correlation with the biological response it is yet to be found. Hence, a special focus on the most desirable properties for an appropriate biological response needs to be addressed. This review provides an overview of the fundamental properties of hydroxyapatite nanoparticles and the characterization of physicochemical properties involved in their biological response and role as a drug delivery system. A summary of the main chemical properties and applications of hydroxyapatite, the advantages of using nanoparticles, and the influence of shape, size, functional group, morphology, and crystalline phase in the biological response is presented. A special emphasis was placed on the analysis of chemical and physical interactions of the nanoparticles and the cargo, which was explained through the use of spectroscopic and physical techniques such as FTIR, Raman, XRD, SEM, DLS, and BET. We discuss the properties tailored for hydroxyapatite nanoparticles for a specific biomolecule based on the compilation of studies performed on proteins, peptides, drugs, and genetic material.
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10
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Abdelshafi MA, Fathy SM, Elkhooly TA, Reicha FM, Osman MF. Bond strength of demineralized dentin after synthesized collagen/hydroxyapatite nanocomposite application. J Mech Behav Biomed Mater 2021; 121:104590. [PMID: 34077907 DOI: 10.1016/j.jmbbm.2021.104590] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/07/2021] [Accepted: 05/09/2021] [Indexed: 01/24/2023]
Abstract
Treatment the deeper and remineralizable carious zone (DRCZ) in dentin with various remineralizing methods, either with classic top-down or biomimetic bottom-up remineralization approaches, has remained a constant main issue to enhance dentin substrate bonding quality. The concern of remineralizing the remaining, partially demineralized and physiologically re-mineralizable collagen fibrils was the optimum target. However, applying already mineralized type I collage fibrils which have the ability to chemically cross-link with remaining collagen and minerals did not gain much interest. Synthesis of collagen/hydroxyapatite (Col/Hap) nanocomposite was done with self-assembling Hap in situ onto Col fibrils with different % (70/30, 50/50, 30/70% of Col/Hap, respectively). Micro-tensile bond strength (μTBS) was evaluated after pre-treatment of artificially demineralized dentin with these suggested protocols [nanocomposite together with grape seed extract (GSE; 6.5%) cross-linker for two periods, 10min and 1 h] then applying self-adhesive bonding system. Applied Col/Hap (30/70%) together with GSE (6.5%) gave the significantly highest μTBS (25.04 ± 5.47 and 25.53 ± 7.64 MPa, for 10min and 1 h application times, respectively). After thermocycling for 10,000 cycles at 5 and 55 °C, μTBS for all protocols and both application times substantially decreased especially for the two control groups. Using the suggested dentin pre-treatment protocols, in chair-side, may possibly enhance the bond strength to DRCZ and its durability.
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Affiliation(s)
- Mostafa A Abdelshafi
- Dental Biomaterials Dep., Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Salma M Fathy
- Dental Biomaterials Dep., Faculty of Oral and Dental Medicine, Zagazig University, Zagazig, Egypt.
| | - Tarek A Elkhooly
- Department of Refractories, Ceramic & Building Materials, National Research Centre, Dokki, 12622, Cairo, Egypt; Faculty of Medicine, Delta University for Science and Technology, Gamsa, Egypt
| | - Fikry M Reicha
- Experimental Solid State Physics Dep., Faculty of Science, Mansoura University Mansoura, Egypt
| | - Manal F Osman
- Dental Biomaterials Dep., Faculty of Dentistry, Mansoura University, Mansoura, Egypt
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11
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Zeng J, Yang S, Yu H, Xu Z, Quan X, Zhou J. Simulation Insight into the Synergic Role of Citrate and Polyaspartic Peptide in Biomineralization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3410-3419. [PMID: 33691409 DOI: 10.1021/acs.langmuir.0c03626] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hydroxyapatite (HAP) is one of the most important inorganic components in biological minerals such as bones and teeth. More than 90% of the total citrate is accumulated in human bones and other biomineralized tissues. In addition, mineralizing proteins are enriched in glutamate and aspartate residues, which are important for their mineral-regulating properties. However, how citrate ions (CITs) and/or acidic amino acids regulate the formation of HAP is still unclear. In this work, molecular dynamics simulations were performed to study how CIT regulates the adsorption behavior of polyaspartic acid (PASP) on the HAP surface in the calcium phosphate solution. The simulation results indicate that PASP can be used as an ion chelator to complex Ca2+ and can serve as templates for HAP mineralization by templating the distribution of Ca2+ on its surface, which are attributed to the -COO- and α-helix structure. Most importantly, the orientation distributions of PASP in all systems are narrower with the help of CIT, thereby PASP can be adsorbed on the HAP surface stably with a "lying-down" orientation. This indicates that CIT can be used as a bridging agent to bond the acidic peptide to the HAP surface in biomineralization. Thus, the synergic role of CIT and the acidic peptide on the HAP surface were revealed in this work, which can provide new insights into the interfacial phenomena during the biomineralization.
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Affiliation(s)
- Jinxiang Zeng
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Shengjiang Yang
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Hai Yu
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Zhiyong Xu
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Xuebo Quan
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Jian Zhou
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
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12
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Basu S, Gorai B, Basu B, Maiti PK. Electric Field-Mediated Fibronectin-Hydroxyapatite Interaction: A Molecular Insight. J Phys Chem B 2021; 125:3-16. [PMID: 33395296 DOI: 10.1021/acs.jpcb.0c08255] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In experimental research-driven biomaterials science, the influence of different material properties (elastic stiffness, surface energy, etc.) and, to a relatively lesser extent, biophysical stimulation (electric/magnetic) on cell-material interactions has been extensively investigated. Despite the central importance of protein adsorption on cell-material interactions, the quantitative analysis to probe into the role of physicochemical factors in protein adsorption remains largely unexplored in biomaterials science. In recent studies, the critical role of electric field stimulation toward the modulation of cell functionality in implantable biomaterials has been experimentally demonstrated. Given this background, we investigated the influence of external electric field stimulation (upto 1.00 V/nm) on fibronectin (FN) adsorption on a hydroxyapatite (HA) (001) surface at 300 K using the all-atom molecular dynamics (MD) simulation method. FN adsorption was found to be governed by attractive electrostatic interactions, which changed with the electric field strength. Nonmonotonous changes in the structural integrity of FN were recorded with the change in the field strength and direction. This can be attributed to the spatial rearrangement of the positions of local charges and the global structural changes of proteins. The dipole moment vectors of FN, water, and HA quantitatively exhibited a similar pattern of orienting themselves parallel to the field direction, with field strength-dependent increase in their magnitudes. No significant change has been recorded for the radial distribution function of water surrounding FN. Field-dependent variation in the salt bridge nets and the number of hydrogen bonds between FN and HA were also examined. One of the important results in the context of cell-material interaction is that the RGD (Arg-Gly-Asp) sequence of FN was exposed to the solvent side when the field was applied along an outward direction perpendicular to the HA (001) surface. In summary, the present study provides molecular insights into the influence of electric field stimulation on phenomenological interactions involved in FN adsorption on the HA surface.
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Affiliation(s)
- Subhadip Basu
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Biswajit Gorai
- Center for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India
| | - Bikramjit Basu
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India.,Center for Biosystems Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Prabal K Maiti
- Center for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India
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13
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Chauhan N, Singh Y. L-histidine controls the hydroxyapatite mineralization with plate-like morphology: Effect of concentration and media. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 120:111669. [PMID: 33545834 DOI: 10.1016/j.msec.2020.111669] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 09/29/2020] [Accepted: 10/20/2020] [Indexed: 12/17/2022]
Abstract
Hydroxyapatite (HA) is the main inorganic component of bone and dentin, and their non-stoichiometric compositions and plate-shaped morphology is responsible for their bioactivity and osteoconductive nature. Collagenous (CPs) and non-collagenous proteins (NCPs) facilitate mineralization and regulate structural properties of HA through their side-chains. The bioactivity of synthetic HA does not usually match with the HA found in bone and, therefore, there is a need to understand the role of biomolecules in bone mineralization in order to develop non-stoichiometric plate-shaped HA for bone grafts. Role of several amino acids has been investigated but the role of L-his has been rarely investigated under physiological conditions even though it is a part of HA inhibitor proteins, like albumin, amelogenin, and histidine-rich proteins. In this study, L-his and L-glu were used to modify the structural properties of HA in different experimental conditions and buffer systems (tris and hepes). The results showed that L-his was able to regulate the plate-shaped morphology of HA in every experimental condition, unlike the L-glu, where the crystal morphology was regulated by experimental conditions. Both amino acids behaved differently in DI water, tris, and hepes buffer, and the media used influenced the precipitation time and structural properties of HA. Hepes and tris buffers also influenced the HA precipitation process. Overall, the studies revealed that L-his may be used as an effective regulator of plate-shaped morphology of HA, instead of large NCPs/proteins, for designing biomaterials for bone regeneration applications and the choice of buffer system is important in designing and evaluating the systems for mineralization. In cell culture studies, mouse osteoblast precursor cells (MC3T3-E1) showed highest proliferation on the bone-like plate-shaped HA, among all the HA samples investigated.
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Affiliation(s)
- Neelam Chauhan
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, 140001, Punjab, India
| | - Yashveer Singh
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, 140001, Punjab, India.
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14
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Azizi D, Larachi F, Garnier A, Lagüe P, Levasseur B. Sorption of aqueous amino acid species on sulphidic mineral surfaces—DFT study and insights on biosourced‐reagent mineral flotation. CAN J CHEM ENG 2020. [DOI: 10.1002/cjce.23841] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Dariush Azizi
- Department of Chemical Engineering Université Laval Québec Québec Canada
| | - Faïçal Larachi
- Department of Chemical Engineering Université Laval Québec Québec Canada
| | - Alain Garnier
- Department of Chemical Engineering Université Laval Québec Québec Canada
| | - Patrick Lagüe
- Department of Biochemistry, Microbiology & Bioinformatics Université Laval Québec Québec Canada
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15
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Qayoom I, Verma R, Murugan PA, Raina DB, Teotia AK, Matheshwaran S, Nair NN, Tägil M, Lidgren L, Kumar A. A biphasic nanohydroxyapatite/calcium sulphate carrier containing Rifampicin and Isoniazid for local delivery gives sustained and effective antibiotic release and prevents biofilm formation. Sci Rep 2020; 10:14128. [PMID: 32839480 PMCID: PMC7445265 DOI: 10.1038/s41598-020-70726-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 07/22/2020] [Indexed: 12/23/2022] Open
Abstract
Long term multiple systemic antibiotics form the cornerstone in the treatment of bone and joint tuberculosis, often combined with local surgical eradication. Implanted carriers for local drug delivery have recently been introduced to overcome some of the limitations associated with conventional treatment strategies. In this study, we used a calcium sulphate hemihydrate (CSH)/nanohydroxyapatite (nHAP) based nanocement (NC) biomaterial as a void filler as well as a local delivery carrier of two standard of care tuberculosis drugs, Rifampicin (RFP) and Isoniazid (INH). We observed that the antibiotics showed different release patterns where INH showed a burst release of 67% and 100% release alone and in combination within one week, respectively whereas RFP showed sustained release of 42% and 49% release alone and in combination over a period of 12 weeks, respectively indicating different possible interactions of antibiotics with nHAP. The interactions were studied using computational methodology, which showed that the binding energy of nHAP with RFP was 148 kcal/mol and INH was 11 kcal/mol, thus varying substantially resulting in RFP being retained in the nHAP matrix. Our findings suggest that a biphasic ceramic based drug delivery system could be a promising treatment alternative to bone and joint TB.
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Affiliation(s)
- Irfan Qayoom
- Department of Biological Science and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India
| | - Rahul Verma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India
| | - Prem Anand Murugan
- Department of Biological Science and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India
| | - Deepak Bushan Raina
- Department of Orthopaedics, The Medical Faculty, Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Arun Kumar Teotia
- Department of Biological Science and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India
| | - Saravanan Matheshwaran
- Department of Biological Science and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India
- Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India
| | - Nisanth N Nair
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India
| | - Magnus Tägil
- Department of Orthopaedics, The Medical Faculty, Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Lars Lidgren
- Department of Orthopaedics, The Medical Faculty, Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Ashok Kumar
- Department of Biological Science and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India.
- Centre for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India.
- Centre for Nanosciences, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India.
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16
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Goreke MD, Alakent B, Soyer-Uzun S. Comparative Study on Factors Governing Binding Mechanisms in Polylactic Acid-Hydroxyapatite and Polyethylene-Hydroxyapatite Systems via Molecular Dynamics Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1125-1137. [PMID: 31935106 DOI: 10.1021/acs.langmuir.9b03480] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Binding mechanisms in polylactic acid-hydroxyapatite (PLA-HAp) and polyethylene-hydroxyapatite (PE-HAp) systems are comparatively elucidated on HAp (110) surfaces in unprecedented detail using molecular dynamics simulations conducted with the systematically varying number of monomers (N) between 10 and 400 at 310 K (NVT). Although PE seems to gradually cover the HAp surface more effectively compared to PLA, evident from the corresponding radius of gyration and occupied area values, the interface density and total binding energy in PLA-HAp systems is higher compared to those of PE-HAp systems. It is shown that a linear relationship between the binding energy and the surface area occupied by the monomer exists, consistent with our finding that binding energy converges to a limiting value with respect to monomer size on a constant surface area. The major constituent of the total binding energy is, rather surprisingly, shown to be the energy change in the bulk structure in HAp upon interaction; the next most important contributor is found to be the energy corresponding to surface-polymer interactions. The interplay between mainly these two contributors, acting in different fashions in two systems investigated here, seems to control the total binding energies. Increasing monomer size N initially results in enhanced densification of the interface in the HAp-PLA system up until N ≈ 200 with the positioning of mainly ═O units of PLA onto the HAp surface, consistent with the increasing Ca-O coordination numbers. Further increases in PLA size (N > 200) result in decreasing intensities of the peaks in the concentration profile consistent with the decreasing surface-polymer interaction energies while increased stabilization of the energy of the bulk is pronounced in this region. On the other hand, increasing N leads to a constantly increasing concentration at the interface in PE-HAp systems; -H atoms of the PE chain are positioned closer to the HAp surface than are -C atoms. These changes are coupled with increasing surface-polymer interaction energies in PE-HAp complexes, while slight destabilization in the energy of the bulk is observed for N > 100. A detailed examination of binding mechanisms in these technologically important systems as presented here is essential in material discovery; this valuable information, that will not be available from experiments can be attained through molecular simulations. The current study, to the best of our knowledge, comprises one of the first steps in achieving this goal for PLA/PE-HAp systems.
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Affiliation(s)
- Melike Dilara Goreke
- Department of Chemical Engineering , Bogazici University , Bebek , 34342 Istanbul , Turkey
| | - Burak Alakent
- Department of Chemical Engineering , Bogazici University , Bebek , 34342 Istanbul , Turkey
| | - Sezen Soyer-Uzun
- Department of Chemical Engineering , Bogazici University , Bebek , 34342 Istanbul , Turkey
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17
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Basu S, Basu B. Unravelling Doped Biphasic Calcium Phosphate: Synthesis to Application. ACS APPLIED BIO MATERIALS 2019; 2:5263-5297. [DOI: 10.1021/acsabm.9b00488] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Subhadip Basu
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Bikramjit Basu
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
- Center for BioSystems Science and Engineering, Indian Institute of Science, Bangalore 560012, India
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18
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Nagi SM, Hassan SN, Abd El-Alim SH, Elmissiry MM. Remineralization potential of grape seed extract hydrogels on bleached enamel compared to fluoride gel: An in vitro study. J Clin Exp Dent 2019; 11:e401-e407. [PMID: 31275511 PMCID: PMC6599700 DOI: 10.4317/jced.55556] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 04/01/2019] [Indexed: 11/17/2022] Open
Abstract
Background Remineralizing of bleached enamel is a common procedure that aims to compensate enamel mineral lose. This study aimed to evaluate the remineralization effectiveness of experimentally prepared grape seed extract hydrogels (GSE) compared to fluoride gel on bleached enamel. Material and Methods Thirty extracted maxillary incisor were bleached using white smile bleaching agent. Bleached specimens were divided into three groups (10/group) according to the remineralizing agents tested: [GSE 6%, GSE 10%, or fluoride gel]. After bleaching and remineralization procedure, the specimens were stored in artificial saliva at 37°C. Micro-hardness and Energy-Dispersive X-ray and ultra-morphological evaluation were tested at baseline, after bleaching and after remineralization. Results Statistical significant decrease on mean micro-hardness values had resulted after bleaching procedure compared to baseline, followed by a significant increase in GSE (10%) and fluoride groups. GSE (6%) application showed the least statistical significant mean micro-hardness, which was statistically insignificant different compared to bleaching procedure. Elemental analysis results revealed a statistical significant decrease on Ca, and Ca/P ratios (At%) values after bleaching compared to baseline, followed by a significant increase after treatment with all tested remineralizing gels. SEM photomicrograph of sound enamel shows smooth uniform appearance with few pores. Bleached enamel showed irregular pitted disorganized enamel surface. Bleached enamel exposed to GSE and fluoride gel showed occlusion of enamel surface porosities and precipitates of different sizes. Conclusions The specially prepared GSE hydrogels has positive effects on the remineralization process of bleached enamel making it an effective natural agent with remineralizing potential. Key words:Remineralization, bleaching, grape seed extract, fluoride, enamel.
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Affiliation(s)
- Shaymaa M Nagi
- Assistant Researcher Professor in Restorative and Dental Materials Department, Oral and Dental Research division, National Research Centre, Egypt
| | - Shahinaz N Hassan
- Researcher in Restorative and Dental Materials Department, Oral and Dental Research division, National Research Centre, Egypt
| | - Sameh H Abd El-Alim
- Assistant Researcher Professor in Pharmaceutical Technology Department, Pharmaceutical Industries Research Division, National Research Centre, Giza, Egypt
| | - Mostafa M Elmissiry
- Researcher Professor in Phytochemistry Department, Pharmaceutical Industries Research Division, National Research centre, Giza, Egypt
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19
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Gu H, Xue Z, Wang M, Yang M, Wang K, Xu D. Effect of Hydroxyapatite Surface on BMP-2 Biological Properties by Docking and Molecular Simulation Approaches. J Phys Chem B 2019; 123:3372-3382. [DOI: 10.1021/acs.jpcb.9b01982] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | | | - Menghao Wang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, P. R. China
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20
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Owuor PS, Tsafack T, Hwang HY, Sajadi M, Jung S, Li T, Susarla S, Wei B, Vajtai R, Lou J, Bhowmick S, Tiwary CS, Ajayan PM. Interconnecting Bone Nanoparticles by Ovalbumin Molecules to Build a Three-Dimensional Low-Density and Tough Material. ACS APPLIED MATERIALS & INTERFACES 2018; 10:41757-41762. [PMID: 30379531 DOI: 10.1021/acsami.8b13681] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Natural building blocks like proteins and hydroxyapatite (HA) are found in abundance. However, their effective utilization to fabricate environment-friendly, strong, stiff, and tough materials remains a challenge. This work reports on the synthesis of a layered material from entirely natural building blocks. A simple process to extract HA from bones, while keeping collagen intact, is presented. These HA nanocrystals have a high aspect ratio as a result of the extraction method that largely retains the pristine nature of the HA. To fabricate the materials, polymerized egg white is used to induce toughness to the crystals where it acts like a load transfer entity between the crystals. As shown by atomic force microscope modulus mapping, the result is a layered material with a modulus that ranges from 3 to 180 GPa. Furthermore, the material exhibits self-stiffening behavior. Hydrogen and ionic bonds are likely to regulate the chemical interactions at the egg white/HA interface and are likely to be responsible for the observed high toughness and stiffness, respectively. The use of the HA/egg white composite as printed scaffolds is also demonstrated together with their biocompatibility.
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Affiliation(s)
- Peter Samora Owuor
- Department of Materials Science and NanoEngineering , Rice University , Houston , Texas 77005 , United States
| | - Thierry Tsafack
- Department of Materials Science and NanoEngineering , Rice University , Houston , Texas 77005 , United States
| | - Hye Yoon Hwang
- Department of Materials Science and NanoEngineering , Rice University , Houston , Texas 77005 , United States
| | - Mohamed Sajadi
- Department of Materials Science and NanoEngineering , Rice University , Houston , Texas 77005 , United States
| | - Seohui Jung
- Department of Materials Science and NanoEngineering , Rice University , Houston , Texas 77005 , United States
| | - Tong Li
- University of Delaware , Newark , Delaware 19716 , United States
| | - Sandhya Susarla
- Department of Materials Science and NanoEngineering , Rice University , Houston , Texas 77005 , United States
| | - Bingqing Wei
- University of Delaware , Newark , Delaware 19716 , United States
| | - Robert Vajtai
- Department of Materials Science and NanoEngineering , Rice University , Houston , Texas 77005 , United States
| | - Jun Lou
- Department of Materials Science and NanoEngineering , Rice University , Houston , Texas 77005 , United States
| | - Sanjit Bhowmick
- Bruker Nano Surfaces , Minneapolis , Minnesota 55344 , United States
| | - Chandra Sekhar Tiwary
- Department of Materials Science and NanoEngineering , Rice University , Houston , Texas 77005 , United States
- Metallurgical and Materials Engineering , Indian Institute of Technology , Kharagpur , West-Bengal 721302 , India
| | - Pulickel M Ajayan
- Department of Materials Science and NanoEngineering , Rice University , Houston , Texas 77005 , United States
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21
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Paisrisarn P, Tepaamorndech S, Khongkow M, Khemthong P, Kasamechonchung P, Klysubun W, Wutikhun T, Huang L, Chantarasakha K, Boonrungsiman S. Alterations of mineralized matrix by lead exposure in osteoblast (MC3T3-E1) culture. Toxicol Lett 2018; 299:172-181. [PMID: 30312686 DOI: 10.1016/j.toxlet.2018.10.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 08/31/2018] [Accepted: 10/08/2018] [Indexed: 01/02/2023]
Abstract
The present study investigated the effect of lead (Pb) on bone ultrastructure and chemistry using an in vitro bone model. MC3T3-E1 preosteoblasts were differentiated and treated with lead acetate at 0.4, 2, 10, and 50 μM. No abnormalities in either cell growth or bone nodule formation were observed with the treated dose of lead acetate. However, Pb treatments could significantly increase Pb accumulation in differentiated osteoblast cultures and upregulate expression of Divalent metal transporter 1 (Dmt1) in a dose dependent manner. Pb treatments also altered the expression of osteogenic genes, including secreted phosphoprotein 1, osteocalcin, type I collagen, and osteoprotegerin. Moreover, in mineralized osteoblast cultures, Pb was found to be mainly deposited as Pb salts and oxides, respectively. Ultrastructure analysis revealed Pb localizing with calcium and phosphorus in the mineralized matrix. In mineralizing osteoblast cells, Pb was found in the intracellular calcified vesicles which is one of the bone mineralization mechanisms. Pb was also present in mineral deposits with various shapes and sizes, such as small and large globular or needle-like mineral deposits representing early to mature stages of mineral deposits. Furthermore, Pb was found more in the globular deposits than the needle shaped mineral crystals. Taken together, our observations revealed how Pb incorporates into bone tissue, and showed a close association with bone apatite.
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Affiliation(s)
- Piyawan Paisrisarn
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathumthani 12120, Thailand
| | - Surapun Tepaamorndech
- National Center of Genetic engineering and Biotechnology Center (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Pathumthani 12120, Thailand
| | - Mattaka Khongkow
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathumthani 12120, Thailand
| | - Pongtanawat Khemthong
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathumthani 12120, Thailand
| | - Panita Kasamechonchung
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathumthani 12120, Thailand
| | - Wantana Klysubun
- Synchrotron Light Research Institute, 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand
| | - Tuksadon Wutikhun
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathumthani 12120, Thailand
| | - Liping Huang
- USDA/ARS/Western Human Nutrition Research Center, 430 West Health Sciences Drive, Davis, CA 95616, USA
| | - Kanittha Chantarasakha
- National Center of Genetic engineering and Biotechnology Center (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Pathumthani 12120, Thailand
| | - Suwimon Boonrungsiman
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathumthani 12120, Thailand.
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Taneja S, Kumar M, Agarwal PM, Bhalla AS. Effect of potential remineralizing agent and antioxidants on color stability of bleached tooth exposed to different staining solutions. J Conserv Dent 2018; 21:378-382. [PMID: 30122817 PMCID: PMC6080191 DOI: 10.4103/jcd.jcd_354_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: The aim of the study was to evaluate the effect of staining solutions, remineralizing agent, and antioxidant on color stability of tooth during and after bleaching. Materials and Methods: Ninety human central incisors were bleached using 35% hydrogen peroxide (Pola office) and allocated to three groups (n = 30). Group I stained with cola-based soft drinks, Group II stained with pomegranate juice, and Group III stained with turmeric. The groups were then divided into three subgroups (n = 10): subgroup A – control (artificial saliva), subgroup B – remineralizing agent (Vantej), and subgroup C - antioxidant (grape seed extract [GSE]). Specimens were bleached according to the manufacturer's recommendations. Color variation measurement was performed using a photoreflectance spectrophotometer before bleaching, during each bleaching session (2-times/week), and after (7 and 15 days) the cessation of bleaching. Artificial saliva was used as the storage medium for the specimens except when measurements were to be recorded. The results were then subjected to statistical analysis. Results: Freshly bleached teeth exposed to Vantej and GSE and significantly lowered the stain absorption. Conclusion: Among the experimental agents, Vantej performed statistically better at all time intervals.
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Affiliation(s)
- Sonali Taneja
- Department of Conservative Dentistry and Endodontics, I.T.S Centre for Dental Studies and Research, Ghaziabad, Uttar Pradesh, India
| | - Mohit Kumar
- Department of Conservative Dentistry and Endodontics, I.T.S Centre for Dental Studies and Research, Ghaziabad, Uttar Pradesh, India
| | - Parul Mour Agarwal
- Department of Conservative Dentistry and Endodontics, I.T.S Centre for Dental Studies and Research, Ghaziabad, Uttar Pradesh, India
| | - Ajeet Singh Bhalla
- Department of Conservative Dentistry and Endodontics, I.T.S Centre for Dental Studies and Research, Ghaziabad, Uttar Pradesh, India
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23
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Albert M, Clifford A, Zhitomirsky I, Rubel O. Adsorption of Maleic Acid Monomer on the Surface of Hydroxyapatite and TiO 2: A Pathway toward Biomaterial Composites. ACS APPLIED MATERIALS & INTERFACES 2018; 10:24382-24391. [PMID: 29961326 DOI: 10.1021/acsami.8b05128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Poly(styrene- alt-maleic acid) adsorption on hydroxyapatite and TiO2 (rutile) was studied using experimental techniques and complemented by ab initio simulations of adsorption of a maleic acid segment as a subunit of the copolymer. Ab initio calculations suggest that the maleic acid segment forms a strong covalent bonding to the TiO2 and hydroxyapatite surfaces. If compared to vacuum, the presence of a solvent significantly reduces the adsorption strength as the polarity of the solvent increases. The results of first-principles calculations are confirmed by the experimental measurements. We found that the adsorbed poly(styrene- alt-maleic acid) allowed efficient dispersion of rutile and formation of films by the electrophoretic deposition. Moreover, rutile can be codispersed and codeposited with hydroxyapatite to form composite films. The coatings showed an enhanced corrosion protection of metallic implants in simulated body fluid solutions, which opens new avenues for the synthesis, dispersion, and colloidal processing of advanced composite materials for biomedical applications.
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Affiliation(s)
- Mitchell Albert
- Department of Materials Science and Engineering , McMaster University , 1280 Main Street West , Hamilton , Ontario L8S 4L8 , Canada
| | - Amanda Clifford
- Department of Materials Science and Engineering , McMaster University , 1280 Main Street West , Hamilton , Ontario L8S 4L8 , Canada
| | - Igor Zhitomirsky
- Department of Materials Science and Engineering , McMaster University , 1280 Main Street West , Hamilton , Ontario L8S 4L8 , Canada
| | - Oleg Rubel
- Department of Materials Science and Engineering , McMaster University , 1280 Main Street West , Hamilton , Ontario L8S 4L8 , Canada
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24
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l-arginine directed and ultrasonically aided growth of nanocrystalline hydroxyapatite particles with tunable morphology. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.11.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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25
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Wang Q, Wang M, Lu X, Wang K, Fang L, Ren F, Lu G. Effects of atomic-level nano-structured hydroxyapatite on adsorption of bone morphogenetic protein-7 and its derived peptide by computer simulation. Sci Rep 2017; 7:15152. [PMID: 29123140 PMCID: PMC5680243 DOI: 10.1038/s41598-017-15219-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 10/23/2017] [Indexed: 11/17/2022] Open
Abstract
Hydroxyapatite (HA) is the principal inorganic component of bones and teeth and has been widely used as a bone repair material because of its good biocompatibility and bioactivity. Understanding the interactions between proteins and HA is crucial for designing biomaterials for bone regeneration. In this study, we evaluated the effects of atomic-level nano-structured HA (110) surfaces on the adsorption of bone morphogenetic protein-7 (BMP-7) and its derived peptide (KQLNALSVLYFDD) using molecular dynamics and density functional theory methods. The results indicated that the atomic-level morphology of HA significantly affected the interaction strength between proteins and HA substrates. The interactions of BMP-7 and its derived peptide with nano-concave and nano-pillar HA surfaces were stronger than those with flat or nano-groove HA surfaces. The results also revealed that if the groove size of nano-structured HA surfaces matched that of residues in the protein or peptide, these residues were likely to spread into the grooves of the nano-groove, nano-concave, and nano-pillar HA, further strengthening the interactions. These results are helpful in better understanding the adsorption behaviors of proteins onto nano-structured HA surfaces, and provide theoretical guidance for designing novel bioceramic materials for bone regeneration and tissue engineering.
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Affiliation(s)
- Qun Wang
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China
- College of Life Science and Biotechnology, MianYang Teachers' College, Mianyang, 621006, Sichuan, China
| | - Menghao Wang
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China
| | - Xiong Lu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China
| | - Kefeng Wang
- National Engineering Research Center for Biomaterials, Genome Research Center for Biomaterials, Sichuan University, Chengdu, 610065, Sichuan, China.
| | - Liming Fang
- Department of Polymer Science and Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Fuzeng Ren
- Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen, Guangdong, 518055, China
| | - Guoming Lu
- School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China
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The precursors effects on biomimetic hydroxyapatite ceramic powders. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:934-946. [DOI: 10.1016/j.msec.2017.02.049] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 11/16/2016] [Accepted: 02/14/2017] [Indexed: 11/21/2022]
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Villarreal-Ramirez E, Eliezer D, Garduño-Juarez R, Gericke A, Perez-Aguilar JM, Boskey A. Phosphorylation regulates the secondary structure and function of dentin phosphoprotein peptides. Bone 2017; 95:65-75. [PMID: 27810285 PMCID: PMC5234040 DOI: 10.1016/j.bone.2016.10.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 10/19/2016] [Accepted: 10/30/2016] [Indexed: 12/30/2022]
Abstract
Dentin phosphoprotein (DPP) is the most acidic protein in vertebrates and structurally is classified as an intrinsically disordered protein. Functionally, DPP is related to dentin and bone formation, however the specifics of such association remain unknown. Here, we used atomistic molecular dynamics simulations to screen selected binding domains of DPP onto hydroxyapatite (HA), which is one of its important interacting partners. From these results, we selected a functionally relevant peptide, Ace-SSDSSDSSDSSDSSD-NH2 (named P5) and its phosphorylated form (named P5P), for experimental characterization. SAXS experiments indicated that in solution P5 was disordered, possibly in an extended conformation while P5P displayed more compact globular conformations. Circular dichroism and FTIR confirmed that, either in the presence or absence of Ca2+/HA, P5 adopts a random coil structure, whereas its phosphorylated counterpart, P5P, has a more compact arrangement associated with conformations that display β-sheet and α-helix motifs when bound to HA. In solution, P5 inhibited HA crystal growth, whereas at similar concentrations, P5P stimulated it. These findings suggest that phosphorylation controls the transient formation of secondary and tertiary structure of DPP peptides, and, most likely of DPP itself, which in turn controls HA growth in solution and possibly HA growth in mineralized tissues.
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Affiliation(s)
- Eduardo Villarreal-Ramirez
- Mineralized Tissue Research Laboratory, Hospital for Special Surgery, New York, NY, USA; Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, MA, USA
| | - David Eliezer
- Department of Biochemistry, Weill Cornell Medical College, New York, NY, USA
| | | | - Arne Gericke
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, MA, USA
| | | | - Adele Boskey
- Mineralized Tissue Research Laboratory, Hospital for Special Surgery, New York, NY, USA; Department of Physiology, Biophysics and Systems Biology, Weill Cornell Medical College, New York, NY, USA.
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Zhou Z, Qian D, Minary-Jolandan M. Clustering of hydroxyapatite on a super-twisted collagen microfibril under mechanical tension. J Mater Chem B 2017; 5:2235-2244. [DOI: 10.1039/c6tb02835g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Atomistic simulation of biomineralization of a super-twisted collagen microfibril reveals that mechanical stimulation facilitates clustering and growth of hydroxyapatite onto collagen.
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Affiliation(s)
- Zhong Zhou
- Department of Mechanical Engineering
- The University of Texas at Dallas
- Richardson
- USA
| | - Dong Qian
- Department of Mechanical Engineering
- The University of Texas at Dallas
- Richardson
- USA
| | - Majid Minary-Jolandan
- Department of Mechanical Engineering
- The University of Texas at Dallas
- Richardson
- USA
- Alan G. MacDiarmid NanoTech Institute
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Tavafoghi M, Cerruti M. The role of amino acids in hydroxyapatite mineralization. J R Soc Interface 2016; 13:20160462. [PMID: 27707904 PMCID: PMC5095212 DOI: 10.1098/rsif.2016.0462] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 08/31/2016] [Indexed: 11/12/2022] Open
Abstract
Polar and charged amino acids (AAs) are heavily expressed in non-collagenous proteins (NCPs), and are involved in hydroxyapatite (HA) mineralization in bone. Here, we review what is known on the effect of single AAs on HA precipitation. Negatively charged AAs, such as aspartic acid, glutamic acid (Glu) and phosphoserine are largely expressed in NCPs and play a critical role in controlling HA nucleation and growth. Positively charged ones such as arginine (Arg) or lysine (Lys) are heavily involved in HA nucleation within extracellular matrix proteins such as collagen. Glu, Arg and Lys intake can also increase bone mineral density by stimulating growth hormone production. In vitro studies suggest that the role of AAs in controlling HA precipitation is affected by their mobility. While dissolved AAs are able to inhibit HA precipitation and growth by chelating Ca2+ and PO43- ions or binding to nuclei of calcium phosphate and preventing their further growth, AAs bound to surfaces can promote HA precipitation by attracting Ca2+ and PO43- ions and increasing the local supersaturation. Overall, the effect of AAs on HA precipitation is worth being investigated more, especially under conditions closer to the physiological ones, where the presence of other factors such as collagen, mineralization inhibitors, and cells heavily influences HA precipitation. A deeper understanding of the role of AAs in HA mineralization will increase our fundamental knowledge related to bone formation, and could lead to new therapies to improve bone regeneration in damaged tissues or cure pathological diseases caused by excessive mineralization in tissues such as cartilage, blood vessels and cardiac valves.
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Affiliation(s)
- M Tavafoghi
- Materials Engineering, McGill University, Montreal, Quebec, Canada H3A 0C5
| | - M Cerruti
- Materials Engineering, McGill University, Montreal, Quebec, Canada H3A 0C5
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Santos-Carballal D, Du Z, King HE, de Leeuw NH. A computational study of the interaction of organic surfactants with goethite α-FeO(OH) surfaces. RSC Adv 2016. [DOI: 10.1039/c6ra12377e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Atomistic simulations based on interatomic potentials show that a range of carboxylic acids adsorb to goethite surfaces.
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Affiliation(s)
| | - Zhimei Du
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| | - Helen E. King
- Department of Earth Sciences
- Utrecht University
- 3584 CD Utrecht
- The Netherlands
| | - Nora H. de Leeuw
- School of Chemistry
- Cardiff University
- Cardiff CF10 3AT
- UK
- Department of Chemistry
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Kopova I, Stráský J, Harcuba P, Landa M, Janeček M, Bačákova L. Newly developed Ti-Nb-Zr-Ta-Si-Fe biomedical beta titanium alloys with increased strength and enhanced biocompatibility. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 60:230-238. [PMID: 26706526 DOI: 10.1016/j.msec.2015.11.043] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 08/16/2015] [Accepted: 11/16/2015] [Indexed: 01/30/2023]
Abstract
Beta titanium alloys are promising materials for load-bearing orthopaedic implants due to their excellent corrosion resistance and biocompatibility, low elastic modulus and moderate strength. Metastable beta-Ti alloys can be hardened via precipitation of the alpha phase; however, this has an adverse effect on the elastic modulus. Small amounts of Fe (0-2 wt.%) and Si (0-1 wt.%) were added to Ti-35Nb-7Zr-6Ta (TNZT) biocompatible alloy to increase its strength in beta solution treated condition. Fe and Si additions were shown to cause a significant increase in tensile strength and also in the elastic modulus (from 65 GPa to 85 GPa). However, the elastic modulus of TNZT alloy with Fe and Si additions is still much lower than that of widely used Ti-6Al-4V alloy (115 GPa), and thus closer to that of the bone (10-30 GPa). Si decreases the elongation to failure, whereas Fe increases the uniform elongation thanks to increased work hardening. Primary human osteoblasts cultivated for 21 days on TNZT with 0.5Si+2Fe (wt.%) reached a significantly higher cell population density and significantly higher collagen I production than cells cultured on the standard Ti-6Al-4V alloy. In conclusion, the Ti-35Nb-7Zr-6Ta-2Fe-0.5Si alloy proves to be the best combination of elastic modulus, strength and also biological properties, which makes it a viable candidate for use in load-bearing implants.
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Affiliation(s)
- Ivana Kopova
- Department of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, , Czech Republic.
| | - Josef Stráský
- Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
| | - Petr Harcuba
- Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
| | - Michal Landa
- Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejskova 5, 182 00 Prague 8, Czech Republic
| | - Miloš Janeček
- Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
| | - Lucie Bačákova
- Department of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14220 Prague 4, , Czech Republic
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Dorozhkin SV. Calcium Orthophosphate-Containing Biocomposites and Hybrid Biomaterials for Biomedical Applications. J Funct Biomater 2015; 6:708-832. [PMID: 26262645 PMCID: PMC4598679 DOI: 10.3390/jfb6030708] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 07/31/2015] [Accepted: 08/01/2015] [Indexed: 12/30/2022] Open
Abstract
The state-of-the-art on calcium orthophosphate (CaPO4)-containing biocomposites and hybrid biomaterials suitable for biomedical applications is presented. Since these types of biomaterials offer many significant and exciting possibilities for hard tissue regeneration, this subject belongs to a rapidly expanding area of biomedical research. Through the successful combinations of the desired properties of matrix materials with those of fillers (in such systems, CaPO4 might play either role), innovative bone graft biomaterials can be designed. Various types of CaPO4-based biocomposites and hybrid biomaterials those are either already in use or being investigated for biomedical applications are extensively discussed. Many different formulations in terms of the material constituents, fabrication technologies, structural and bioactive properties, as well as both in vitro and in vivo characteristics have been already proposed. Among the others, the nano-structurally controlled biocomposites, those containing nanodimensional compounds, biomimetically fabricated formulations with collagen, chitin and/or gelatin, as well as various functionally graded structures seem to be the most promising candidates for clinical applications. The specific advantages of using CaPO4-based biocomposites and hybrid biomaterials in the selected applications are highlighted. As the way from a laboratory to a hospital is a long one and the prospective biomedical candidates have to meet many different necessities, the critical issues and scientific challenges that require further research and development are also examined.
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Wang Q, Wang MH, Wang KF, Liu Y, Zhang HP, Lu X, Zhang XD. Computer simulation of biomolecule–biomaterial interactions at surfaces and interfaces. Biomed Mater 2015; 10:032001. [DOI: 10.1088/1748-6041/10/3/032001] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Molecular interactions in biomineralized hydroxyapatite amino acid modified nanoclay: In silico design of bone biomaterials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 46:207-17. [DOI: 10.1016/j.msec.2014.07.057] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 07/15/2014] [Indexed: 11/22/2022]
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Abstract
The remarkable properties of bone derive from a highly organized arrangement of coaligned nanometer-scale apatite platelets within a fibrillar collagen matrix. The origin of this arrangement is poorly understood and the crystal structures of hydroxyapatite (HAP) and the nonmineralized collagen fibrils alone do not provide an explanation. Moreover, little is known about collagen-apatite interaction energies, which should strongly influence both the molecular-scale organization and the resulting mechanical properties of the composite. We investigated collagen-mineral interactions by combining dynamic force spectroscopy (DFS) measurements of binding energies with molecular dynamics (MD) simulations of binding and atomic force microscopy (AFM) observations of collagen adsorption on single crystals of calcium phosphate for four mineral phases of potential importance in bone formation. In all cases, we observe a strong preferential orientation of collagen binding, but comparison between the observed orientations and transmission electron microscopy (TEM) analyses of native tissues shows that only calcium-deficient apatite (CDAP) provides an interface with collagen that is consistent with both. MD simulations predict preferred collagen orientations that agree with observations, and results from both MD and DFS reveal large values for the binding energy due to multiple binding sites. These findings reconcile apparent contradictions inherent in a hydroxyapatite or carbonated apatite (CAP) model of bone mineral and provide an energetic rationale for the molecular-scale organization of bone.
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37
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Sun JP, Dai J, Song Y, Wang Y, Yang R. Affinity of the interface between hydroxyapatite (0001) and titanium (0001) surfaces: a first-principles investigation. ACS APPLIED MATERIALS & INTERFACES 2014; 6:20738-20751. [PMID: 25390283 DOI: 10.1021/am504734d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A basic understanding of the affinity between the hydroxyapatite (HA) and α-Ti surfaces is obtained through electronic structure calculations by first-principles method. The surface energies of HA(0001), HA (011̅0), HA (101̅1), and Ti(0001) surfaces have been calculated. The HA(0001) presents the most thermodynamically stable of HA. The HA/Ti interfaces were constructed by two kinds of interface models, the single interface (denoted as SI) and the double-interface (denoted as DI). Two methods, the full relaxation and the UBER, were applied to determine the interfacial separation and the atomic arrangement in the interfacial zone. The works of adhesion of interfaces with various stoichiometric HA surfaces were evaluated. For the HA(0001)/Ti(0001) interfaces, the work of adhesion is strongly dependent on the chemical environment of the HA surface. The values are -2.33, -1.52, and -0.80 J/m(2) for the none-, single-, and double-Ca terminated HA/Ti interfaces, respectively. The influence of atomic relaxation on the work of adhesion and interface separation is discussed. Full relaxation results include -1.99 J/m(2) work of adhesion and 0.220 nm separation between HA and Ti for the DI of 1-Ca-HA/Ti interface, while they are -1.14 J/m(2) and 0.235 nm by partial relaxation. Analysis of electronic structure reveals that charge transfer between HA and Ti slabs occurs during the formation of the HA/Ti interface. The transfer generates the Ti-O or Ti-Ca bonds across the interface and drives the HA/Ti interface system to metallic characteristic. The energetically favorable interfaces are formed when the outmost layer of HA comprises more O atoms at the interface.
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Affiliation(s)
- Jin P Sun
- School of Materials Science and Engineering, Harbin Institute of Technology at Weihai , 2 West Wenhua Road, Weihai 264209, China
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38
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Biomimetic self-assembly of apatite hybrid materials: From a single molecular template to bi-/multi-molecular templates. Biotechnol Adv 2014; 32:744-60. [DOI: 10.1016/j.biotechadv.2013.10.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 10/17/2013] [Accepted: 10/29/2013] [Indexed: 12/25/2022]
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Nair AK, Gautieri A, Buehler MJ. Role of Intrafibrillar Collagen Mineralization in Defining the Compressive Properties of Nascent Bone. Biomacromolecules 2014; 15:2494-500. [DOI: 10.1021/bm5003416] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Arun K. Nair
- Laboratory for Atomistic and Molecular Mechanics (LAMM), Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Room 1-235 A&B, Cambridge, Massachusetts 02139, United States
| | - Alfonso Gautieri
- Laboratory for Atomistic and Molecular Mechanics (LAMM), Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Room 1-235 A&B, Cambridge, Massachusetts 02139, United States
- Biomechanics
Group, Department of Electronics, Information and Bioengineering, Politecnico di Milano, Via Golgi 39, 20133 Milan, Italy
| | - Markus J. Buehler
- Laboratory for Atomistic and Molecular Mechanics (LAMM), Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Room 1-235 A&B, Cambridge, Massachusetts 02139, United States
- Center
for Computational Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
- Center
for Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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40
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Liao C, Xie Y, Zhou J. Computer simulations of fibronectin adsorption on hydroxyapatite surfaces. RSC Adv 2014. [DOI: 10.1039/c3ra47381c] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Mirkarimi M, Eskandarion S, Bargrizan M, Delazar A, Kharazifard MJ. Remineralization of artificial caries in primary teeth by grape seed extract: an in vitro study. J Dent Res Dent Clin Dent Prospects 2013; 7:206-10. [PMID: 24578818 PMCID: PMC3935551 DOI: 10.5681/joddd.2013.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 05/07/2013] [Indexed: 11/17/2022] Open
Abstract
Background and aims. Promoting remineralization is the ultimate goal of clinical prevention of caries lesion. The present in vitro study aimed to investigate the effect of grape seed extract (GSE) on artificial enamel caries in primary human teeth.
Materials and methods. Seventeen human sound primary incisors were sectioned mesiodistally. The tooth slices were placed in a demineralizing solution for 96 hours at 37ºC and 50% relative humidity to create lesions. The demineralized fragments of each tooth were randomly divided into two case (immersed in GSE solution in phosphate buffer for 8 days) and control (immersed in distilled water) groups. The samples were subsequently evaluated using a scanning electron microscope and a micro-hardness tester. Data were analyzed using independent t-test.
Results. The mean ± SD micro-hardness values for the case and control groups were 358.6±83.42 and 296.51± 69.41, respectively. Grape seed extract significantly increased the micro-hardness of the lesions (P=0.03). The morphology of GSE treated enamel was clearly different from that in the control group, and there were deposits of scaffolding insoluble complexes on the enamel surface.
Conclusion. GSE enhanced the remineralization process of artificial enamel lesions of primary teeth, and thus, might be considered an effective natural agent in non-invasive dentistry.
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Affiliation(s)
- Mahkameh Mirkarimi
- Assistant Professor, Department of Pediatric dentistry, Children and Adolescent Health Research Center, Zahedan University of Medical Sciences, Za-hedan, Iran
| | - Solmauz Eskandarion
- Assistant Professor, Department of Dental Materials, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Majid Bargrizan
- Associate Professor, Department of Pediatric Dentistry, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbas Delazar
- Professor of Faculty of Pharmacy and Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Javad Kharazifard
- Phd Candidate of Epidemiology Department of Epidemiology and Biostatistics, School of public health, Tehran University of Medical Sciences, Tehran, Iran
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42
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Molecular mechanics of mineralized collagen fibrils in bone. Nat Commun 2013; 4:1724. [PMID: 23591891 PMCID: PMC3644085 DOI: 10.1038/ncomms2720] [Citation(s) in RCA: 269] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 03/08/2013] [Indexed: 01/09/2023] Open
Abstract
Bone is a natural composite of collagen protein and the mineral hydroxyapatite. The structure of bone is known to be important to its load-bearing characteristics, but relatively little is known about this structure or the mechanism that govern deformation at the molecular scale. Here we perform full-atomistic calculations of the three-dimensional molecular structure of a mineralized collagen protein matrix to try to better understand its mechanical characteristics under tensile loading at various mineral densities. We find that as the mineral density increases, the tensile modulus of the network increases monotonically and well beyond that of pure collagen fibrils. Our results suggest that the mineral crystals within this network bears up to four times the stress of the collagen fibrils, whereas the collagen is predominantly responsible for the material’s deformation response. These findings reveal the mechanism by which bone is able to achieve superior energy dissipation and fracture resistance characteristics beyond its individual constituents. Bone is a natural composite of collagen and hydroxyapatite but, surprising, little is known about its characteristics at the molecular scale. Nair et al. conduct molecular-scale simulations of mineralized collagen networks to better understand how bone achieves superior mechanical properties to its constituents.
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43
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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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44
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Jahromi MT, Yao G, Cerruti M. The importance of amino acid interactions in the crystallization of hydroxyapatite. J R Soc Interface 2012; 10:20120906. [PMID: 23269851 DOI: 10.1098/rsif.2012.0906] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Non-collagenous proteins (NCPs) inhibit hydroxyapatite (HA; Ca(5)(PO(4))(3)OH) formation in living organisms by binding to nascent nuclei of HA and preventing their further growth. Polar and charged amino acids (AAs) are highly expressed in NCPs, and the negatively charged ones, such as glutamic acid (Glu) and phosphoserine (P-Ser) seem to be mainly responsible for the inhibitory effect of NCPs. Despite the recognized importance of these AAs on the behaviour of NCPs, their specific effect on HA crystallization is still unclear, and controversial results have been reported concerning the efficacy of HA inhibition of positively versus negatively charged AAs. We focused on a positively charged (arginine, Arg) and a negatively charged (Glu) AA, and their combination in the same solution. We studied their inhibitory effect on HA nucleation and growth at physiological temperature and pH and we determined the mechanism by which they can affect HA crystallization. Our results showed a strong inhibitory effect of Arg on HA nucleation; however, Glu was more effective in inhibiting HA crystal growth during the growth stage. The combination of Glu and Arg was less effective in controlling HA nucleation, but it inhibited HA crystal growth. We attributed these differences to the stability of complexes formed between AAs and calcium and phosphate ions at the nucleation stage, and in bonding strength of AAs to HA crystal faces during the growth stage. The AAs also influenced the morphology of synthesized HA. Presence of either Arg or Glu resulted in the formation of spherulites consisting of preferentially oriented nanoplatelets orientation. This was attributed to kinetic factors favoring growth front nucleation (GFN) mechanism.
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Affiliation(s)
- M Tavafoghi Jahromi
- Department of Materials Engineering, McGill University, Montreal, Quebec, Canada
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45
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Pradhan SM, Katti KS, Katti DR. Structural Hierarchy Controls Deformation Behavior of Collagen. Biomacromolecules 2012; 13:2562-9. [DOI: 10.1021/bm300801a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shashindra M. Pradhan
- Department of Civil Engineering, North Dakota State University, Fargo,
North Dakota 58108, United States
| | - Kalpana S. Katti
- Department of Civil Engineering, North Dakota State University, Fargo,
North Dakota 58108, United States
| | - Dinesh R. Katti
- Department of Civil Engineering, North Dakota State University, Fargo,
North Dakota 58108, United States
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46
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Wang K, Zhou C, Hong Y, Zhang X. A review of protein adsorption on bioceramics. Interface Focus 2012; 2:259-77. [PMID: 23741605 DOI: 10.1098/rsfs.2012.0012] [Citation(s) in RCA: 163] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Accepted: 02/28/2012] [Indexed: 11/12/2022] Open
Abstract
Bioceramics, because of its excellent biocompatible and mechanical properties, has always been considered as the most promising materials for hard tissue repair. It is well know that an appropriate cellular response to bioceramics surfaces is essential for tissue regeneration and integration. As the in vivo implants, the implanted bioceramics are immediately coated with proteins from blood and body fluids, and it is through this coated layer that cells sense and respond to foreign implants. Hence, the adsorption of proteins is critical within the sequence of biological activities. However, the biological mechanisms of the interactions of bioceramics and proteins are still not well understood. In this review, we will recapitulate the recent studies on the bioceramic-protein interactions.
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Affiliation(s)
- Kefeng Wang
- National Engineering Research Center for Biomaterials , Sichuan University , 610064 Chengdu , People's Republic of China
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Qin Z, Gautieri A, Nair AK, Inbar H, Buehler MJ. Thickness of hydroxyapatite nanocrystal controls mechanical properties of the collagen-hydroxyapatite interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1982-1992. [PMID: 22208454 DOI: 10.1021/la204052a] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Collagen-hydroxyapatite interfaces compose an important building block of bone structures. While it is known that the nanoscale structure of this elementary building block can affect the mechanical properties of bone, a systematic understanding of the effect of the geometry on the mechanical properties of this interface between protein and mineral is lacking. Here we study the effect of geometry, different crystal surfaces, and hydration on the mechanical properties of collagen-hydroxyapatite interfaces from an atomistic perspective, and discuss underlying deformation mechanisms. We find that the presence of hydroxyapatite significantly enhances the tensile modulus and strength compared with a tropocollagen molecule alone. The stiffening effect is strongly dependent on the thickness of the mineral crystal until a plateau is reached at 2 nm crystal thickness. We observe no significant differences due to the mineral surface (Ca surface vs OH surface) or due to the presence of water. Our result shows that the hydroxyapatite crystal with its thickness confined to the nanometer size efficiently increases the tensile modulus and strength of the collagen-hydroxyapatite composite, agreeing well with experimental observations that consistently show the existence of extremely thin mineral flakes in various types of bones. We also show that the collagen-hydroxyapatite interface can be modeled with an elastic network model which, based on the results of atomistic simulations, provides a good estimate of the surface energy and other mechanical features.
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Affiliation(s)
- Zhao Qin
- Laboratory for Atomistic and Molecular Mechanics (LAMM), Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Room 1-235 A&B, Cambridge, Massachusetts 02139, USA
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Barbani N, Guerra GD, Cristallini C, Urciuoli P, Avvisati R, Sala A, Rosellini E. Hydroxyapatite/gelatin/gellan sponges as nanocomposite scaffolds for bone reconstruction. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:51-61. [PMID: 22116662 DOI: 10.1007/s10856-011-4505-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Accepted: 11/16/2011] [Indexed: 05/31/2023]
Abstract
The aim of this work was the morphological, physicochemical, mechanical and biological characterization of a new composite system, based on gelatin, gellan and hydroxyapatite, and mimicking the composition of natural bone. Porous scaffolds were prepared by freeze-drying technique, under three different conditions of freezing. The morphological analysis showed a homogeneous porosity, with well interconnected pores, for the sample which underwent a more rapid freezing. The elastic modulus of the same sample was close to that of the natural bone. The presence of interactions among the components was demonstrated through the physicochemical investigation. In addition, the infrared chemical imaging analysis pointed out the similarity among the composite scaffold and the natural bone, in terms of chemical composition, homogeneity, molecular interactions and structural conformation. Preliminary biological characterization showed a good adhesion and proliferation of human mesenchymal stem cells.
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Affiliation(s)
- Niccoletta Barbani
- Department of Chemical Engineering, Industrial Chemistry and Materials Science, University of Pisa, Pisa, Italy.
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Rai B, Sathish P, Tanwar J, Pradip, Moon K, Fuerstenau D. A molecular dynamics study of the interaction of oleate and dodecylammonium chloride surfactants with complex aluminosilicate minerals. J Colloid Interface Sci 2011; 362:510-6. [DOI: 10.1016/j.jcis.2011.06.069] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Revised: 06/17/2011] [Accepted: 06/25/2011] [Indexed: 10/18/2022]
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Abstract
The state-of-the-art of biocomposites and hybrid biomaterials based on calcium orthophosphates that are suitable for biomedical applications is presented in this review. Since these types of biomaterials offer many significant and exciting possibilities for hard tissue regeneration, this subject belongs to a rapidly expanding area of biomedical research. Through successful combinations of the desired properties of matrix materials with those of fillers (in such systems, calcium orthophosphates might play either role), innovative bone graft biomaterials can be designed. Various types of biocomposites and hybrid biomaterials based on calcium orthophosphates, either those already in use or being investigated for biomedical applications, are extensively discussed. Many different formulations, in terms of the material constituents, fabrication technologies, structural and bioactive properties as well as both in vitro and in vivo characteristics, have already been proposed. Among the others, the nanostructurally controlled biocomposites, those containing nanodimensional compounds, biomimetically fabricated formulations with collagen, chitin and/or gelatin as well as various functionally graded structures seem to be the most promising candidates for clinical applications. The specific advantages of using biocomposites and hybrid biomaterials based on calcium orthophosphates in the selected applications are highlighted. As the way from the laboratory to the hospital is a long one, and the prospective biomedical candidates have to meet many different necessities, this review also examines the critical issues and scientific challenges that require further research and development.
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