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Parfenova LV, Lukina ES, Galimshina ZR, Gil’fanova GU, Mukaeva VR, Farrakhov RG, Danilko KV, Dyakonov GS, Parfenov EV. Biocompatible Organic Coatings Based on Bisphosphonic Acid RGD-Derivatives for PEO-Modified Titanium Implants. Molecules 2020; 25:E229. [PMID: 31935900 PMCID: PMC6982944 DOI: 10.3390/molecules25010229] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 12/25/2019] [Accepted: 01/01/2020] [Indexed: 12/11/2022] Open
Abstract
Currently, significant attention is attracted to the problem of the development of the specific architecture and composition of the surface layer in order to control the biocompatibility of implants made of titanium and its alloys. The titanium surface properties can be tuned both by creating an inorganic sublayer with the desired morphology and by organic top coating contributing to bioactivity. In this work, we developed a composite biologically active coatings based on hybrid molecules obtained by chemical cross-linking of amino acid bisphosphonates with a linear tripeptide RGD, in combination with inorganic porous sublayer created on titanium by plasma electrolytic oxidation (PEO). After the addition of organic molecules, the PEO coated surface gets nobler, but corrosion currents increase. In vitro studies on proliferation and viability of fibroblasts, mesenchymal stem cells and osteoblast-like cells showed the significant dependence of the molecule bioactivity on the structure of bisphosphonate anchor and the linker. Several RGD-modified bisphosphonates of β-alanine, γ-aminobutyric and ε-aminocaproic acids with BMPS or SMCC linkers can be recommended as promising candidates for further in vivo research.
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Affiliation(s)
- Lyudmila V. Parfenova
- Institute of Petrochemistry and Catalysis of Russian Academy of Sciences, 141, Prospekt Oktyabrya, 450075 Ufa, Russia; (E.S.L.); (Z.R.G.); (G.U.G.)
| | - Elena S. Lukina
- Institute of Petrochemistry and Catalysis of Russian Academy of Sciences, 141, Prospekt Oktyabrya, 450075 Ufa, Russia; (E.S.L.); (Z.R.G.); (G.U.G.)
| | - Zulfia R. Galimshina
- Institute of Petrochemistry and Catalysis of Russian Academy of Sciences, 141, Prospekt Oktyabrya, 450075 Ufa, Russia; (E.S.L.); (Z.R.G.); (G.U.G.)
| | - Guzel U. Gil’fanova
- Institute of Petrochemistry and Catalysis of Russian Academy of Sciences, 141, Prospekt Oktyabrya, 450075 Ufa, Russia; (E.S.L.); (Z.R.G.); (G.U.G.)
| | - Veta R. Mukaeva
- Department of Theoretical Basis of Electrical Engineering, Ufa State Aviation Technical University, 12 Karl Marx Street, 450008 Ufa, Russia; (V.R.M.); (R.G.F.); (E.V.P.)
| | - Ruzil G. Farrakhov
- Department of Theoretical Basis of Electrical Engineering, Ufa State Aviation Technical University, 12 Karl Marx Street, 450008 Ufa, Russia; (V.R.M.); (R.G.F.); (E.V.P.)
| | - Ksenia V. Danilko
- Bashkir State Medical University, 3 Lenin Street, 450000 Ufa, Russia;
| | - Grigory S. Dyakonov
- Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 Karl Marx Street, 450008 Ufa, Russia;
| | - Evgeny V. Parfenov
- Department of Theoretical Basis of Electrical Engineering, Ufa State Aviation Technical University, 12 Karl Marx Street, 450008 Ufa, Russia; (V.R.M.); (R.G.F.); (E.V.P.)
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Liu Y, Rath B, Tingart M, Eschweiler J. Role of implants surface modification in osseointegration: A systematic review. J Biomed Mater Res A 2019; 108:470-484. [DOI: 10.1002/jbm.a.36829] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 10/23/2019] [Indexed: 12/24/2022]
Affiliation(s)
- Yu Liu
- Department of Orthopaedic Surgery RWTH Aachen University Clinic Aachen Germany
| | - Björn Rath
- Department of Orthopaedic Surgery RWTH Aachen University Clinic Aachen Germany
| | - Markus Tingart
- Department of Orthopaedic Surgery RWTH Aachen University Clinic Aachen Germany
| | - Jörg Eschweiler
- Department of Orthopaedic Surgery RWTH Aachen University Clinic Aachen Germany
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Modeling integrin and plasma-polymerized pyrrole interactions: chemical diversity relevance for cell regeneration. Sci Rep 2019; 9:7009. [PMID: 31065077 PMCID: PMC6504955 DOI: 10.1038/s41598-019-43286-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 04/17/2019] [Indexed: 01/15/2023] Open
Abstract
Protein-engineered biomaterials represent a powerful approach to increase biofunctional activity like tissue repair and celular proliferation. Among these materials, integrins and the development of their specific interactions with plasma-polymerized pyrrole (PPPy) are promising biomaterial for tissue regeneration. In this paper, we studied the molecular recognition in the active site of three integrins (α5β1, αvβ3 and αIIbβ3) with PPPy using the structure proposed by Kumar et al. PPPy molecule has three sites to incorporate different species, we worked mainly with the functional groups, –NH2 and –OH groups according to our IR spectroscopic results. We carried out docking studies to find the better conformational couplings and to determine electrostatic (ΔGelec) and non-electrostatic (ΔGnon-elec) contributions to the binding free energy (ΔGb) of these complexes we used Adaptive Poisson-Bolztmann program (APBS). Our results indicated that when incorporating -1H-azirine, -NH2 or –OH group in PPPy structure, interactions with integrins were favorable, as indicated by correspondent ΔGb values. These interactions were mainly triggered by Coulomb interactions, an important term in the electrostatic component. Furthermore, our studies suggest that some residues of integrins α5β1, αvβ3 and αIIbβ3 like aspartates are important for the binding to PPPy structures. Detailed interactions between integrin α5β1 and PPPy structures were revealed by molecular dynamics simulations. We used this particular integrin structure because of its favorable ΔGb as well as its major cellular receptor for the extracellular matrix protein fibronectin. Clustering analysis allowed us to carry out focused docking studies and to determine the time evolution of the ΔGb values. By incorporating -NH2 into PPPy structure, ΔGb values were very favorable during the course of the dynamics simulations by the establishment of hydrogen bonds with Asn224 and/orAsp227 residues, which are part of the integrin α5β1 pocket. However, for the integrin α5β1-PPPy-1H-azirine complex and the rest of the functional groups, the ΔGb values were less favorable, although PPPy was found at a distance of less than 5 Å from the active site residues. This work is complementary to the previous studies made employing PPPy nanoparticles for a variety of tissue engineering applications, and were done to enlighten the role played by the amino group of the PPPy in its integrin recognition process.
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Liao J, Wu S, Li K, Fan Y, Dunne N, Li X. Peptide‐modified bone repair materials: Factors influencing osteogenic activity. J Biomed Mater Res A 2019; 107:1491-1512. [DOI: 10.1002/jbm.a.36663] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/29/2019] [Accepted: 02/14/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Jie Liao
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical Engineering, Beihang University Beijing 100083 China
| | - Shuai Wu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical Engineering, Beihang University Beijing 100083 China
| | - Kun Li
- State Key Laboratory of Powder MetallurgyCentral South University Changsha 410083 China
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical Engineering, Beihang University Beijing 100083 China
- Beijing Advanced Innovation Center for Biomedical EngineeringBeihang University Beijing 100083 China
| | - Nicholas Dunne
- Centre for Medical Engineering ResearchSchool of Mechanical and Manufacturing Engineering, Dublin City University Stokes Building, Collins Avenue, Dublin 9 Ireland
| | - Xiaoming Li
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical Engineering, Beihang University Beijing 100083 China
- Beijing Advanced Innovation Center for Biomedical EngineeringBeihang University Beijing 100083 China
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Heller M, Kumar VV, Pabst A, Brieger J, Al-Nawas B, Kämmerer PW. Osseous response on linear and cyclic RGD-peptides immobilized on titanium surfaces in vitro and in vivo. J Biomed Mater Res A 2017; 106:419-427. [PMID: 28971567 DOI: 10.1002/jbm.a.36255] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Revised: 09/18/2017] [Accepted: 09/25/2017] [Indexed: 12/11/2022]
Abstract
Biomimetic surface modifications of titanium (Ti) implants using the Arg-Gly-Asp-sequence (RGD) are promising to accelerate bone healing in cases of medical implants. Therefore, we compared the impact of linear and cyclic RGD (l- and c-RGD) covalently coupled onto Ti surfaces on the osseous response in vitro and in vivo. In vitro, osteoblasts' behavior on different surfaces (unmodified, amino-silanized [APTES], l- and c-RGD) was analysed regarding adhesion (fluorescence microscopy), proliferation (resazurin stain) and differentiation (reverse transcription polymerase chain reaction on alkaline phosphatase and osteocalcin). In vivo, osteosynthesis screws (unmodified n = 8, l-RGD n = 8, c-RGD n = 8) were inserted into the proximal tibiae of 12 rabbits and evaluated for bone growth parameters (bone implant contact [%] and vertical bone apposition [VBA;%]) at 3 and 6 weeks. In vitro, c- as well as l-RGD surfaces stimulated osteoblasts' adherence, proliferation and differentiation in a similar manner, with only subtle evidence of superiority of the c-RGD modifications. In vivo, c-RGD-modifications led to a significantly increased VBA after 3 and 6 weeks. Thus, coating with c-RGD appears to play an important role influencing osteoblasts' behaviour in vitro but especially in vivo. These findings can be applied prospectively to implantable biomaterials with hypothetically improved survival and success rates. © 2017 Wiley Periodicals Inc. J Biomed Mater Res Part A: 106A: 419-427, 2018.
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Affiliation(s)
- M Heller
- Department of Otorhinolaryngology, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - V V Kumar
- Department of Oral, Maxillofacial and Plastic Surgery, University Medical Centre Rostock, Schillingallee 35, 18057, Rostock, Germany
| | - A Pabst
- Department of Oral, Maxillofacial and Plastic Surgery, Federal Armed Forces Hospital Koblenz, Germany
| | - J Brieger
- Department of Otorhinolaryngology, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - B Al-Nawas
- Department of Oral, Maxillofacial and Plastic Surgery, University Medical Centre Halle (Saale), Germany
| | - P W Kämmerer
- Department of Oral, Maxillofacial and Plastic Surgery, University Medical Centre Rostock, Schillingallee 35, 18057, Rostock, Germany
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Lai K, Xi Y, Miao X, Jiang Z, Wang Y, Wang H, Yang G. PTH coatings on titanium surfaces improved osteogenic integration by increasing expression levels of BMP-2/Runx2/Osterix. RSC Adv 2017. [DOI: 10.1039/c7ra09738g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The aim of this experiment was to assemble parathyroid hormone (PTH) coatings on titanium surfaces and evaluate the effect on implant osseointegration.
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Affiliation(s)
- Kaichen Lai
- Department of Implantology
- Stomatology Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
| | - Yue Xi
- Department of Implantology
- Stomatology Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
| | - Xiaoyan Miao
- Department of Science and Education
- Stomatology Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
| | - Zhiwei Jiang
- Department of Implantology
- Stomatology Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
| | - Ying Wang
- Department of Oral Medicine
- Stomatology Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
| | - Huiming Wang
- Department of Oral and Maxillofacial Surgery
- Stomatology Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
| | - Guoli Yang
- Department of Implantology
- Stomatology Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
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Vila M, García A, Girotti A, Alonso M, Rodríguez-Cabello JC, González-Vázquez A, Planell JA, Engel E, Buján J, García-Honduvilla N, Vallet-Regí M. 3D silicon doped hydroxyapatite scaffolds decorated with Elastin-like Recombinamers for bone regenerative medicine. Acta Biomater 2016; 45:349-356. [PMID: 27639311 DOI: 10.1016/j.actbio.2016.09.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 07/20/2016] [Accepted: 09/14/2016] [Indexed: 12/19/2022]
Abstract
The current study reports on the manufacturing by rapid prototyping technique of three-dimensional (3D) scaffolds based on silicon substituted hydroxyapatite with Elastin-like Recombinamers (ELRs) functionalized surfaces. Silicon doped hydroxyapatite (Si-HA), with Ca10(PO4)5.7(SiO4)0.3(OH)1.7h0.3 nominal formula, was surface functionalized with two different types of polymers designed by genetic engineering: ELR-RGD that contain cell attachment specific sequences and ELR-SNA15/RGD with both hydroxyapatite and cells domains that interact with the inorganic phase and with the cells, respectively. These hybrid materials were subjected to in vitro assays in order to clarify if the ELRs coating improved the well-known biocompatible and bone regeneration properties of calcium phosphates materials. The in vitro tests showed that there was a total and homogeneous colonization of the 3D scaffolds by Bone marrow Mesenchymal Stromal Cells (BMSCs). In addition, the BMSCs were viable and able to proliferate and differentiate into osteoblasts. STATEMENT OF SIGNIFICANCE Bone tissue engineering is an area of increasing interest because its main applications are directly related to the rising life expectancy of the population, which promotes higher rates of several bone pathologies, so innovative strategies are needed for bone tissue regeneration therapies. Here we use the rapid prototyping technology to allow moulding ceramic 3D scaffolds and we use different bio-polymers for the functionalization of their surfaces in order to enhance the biological response. Combining the ceramic material (silicon doped hydroxyapatite, Si-HA) and the Elastin like Recombinamers (ELRs) polymers with the presence of the integrin-mediate adhesion domain alone or in combination with SNA15 peptide that possess high affinity for hydroxyapatite, provided an improved Bone marrow Mesenchymal Stromal Cells (BMSCs) differentiation into osteoblastic linkage.
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Ao H, Xie Y, Tan H, Yang S, Li K, Wu X, Zheng X, Tang T. Fabrication and in vitro evaluation of stable collagen/hyaluronic acid biomimetic multilayer on titanium coatings. J R Soc Interface 2013; 10:20130070. [PMID: 23635490 DOI: 10.1098/rsif.2013.0070] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Layer-by-layer (LBL) self-assembly technique has been proved to be a highly effective method to immobilize the main components of the extracellular matrix such as collagen and hyaluronic acid on titanium-based implants and form a polyelectrolyte multilayer (PEM) film by electrostatic interaction. However, the formed PEM film is unstable in the physiological environment and affects the long-time effectiveness of PEM film. In this study, a modified LBL technology has been developed to fabricate a stable collagen/hyaluronic acid (Col/HA) PEM film on titanium coating (TC) by introducing covalent immobilization. Scanning electron microscopy, diffuse reflectance Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to characterize the PEM film. Results of Sirius red staining demonstrated that the chemical stability of PEM film was greatly improved by covalent cross-linking. Cell culture assays further illustrated that the functions of human mesenchymal stem cells, such as attachment, spreading, proliferation and differentiation, were obviously enhanced by the covalently immobilized Col/HA PEM on TCs compared with the absorbed Col/HA PEM. The improved stability and biological properties of the Col/HA PEM covalently immobilized TC may be beneficial to the early osseointegration of the implants.
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Affiliation(s)
- Haiyong Ao
- Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, People's Republic of China
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Jäger M, Böge C, Janissen R, Rohrbeck D, Hülsen T, Lensing-Höhn S, Krauspe R, Herten M. Osteoblastic potency of bone marrow cells cultivated on functionalized biometals with cyclic RGD-peptide. J Biomed Mater Res A 2013; 101:2905-14. [DOI: 10.1002/jbm.a.34590] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2012] [Accepted: 01/03/2013] [Indexed: 11/07/2022]
Affiliation(s)
| | - C. Böge
- Orthopaedic Department; University of Duisburg-Essen; Germany
| | | | - D. Rohrbeck
- Institute of Molecular Physical Chemistry; Heinrich-Heine University Düsseldorf; Germany
| | - T. Hülsen
- Orthopaedic Department; University of Duisburg-Essen; Germany
| | - S. Lensing-Höhn
- Orthopaedic Department; Heinrich-Heine-University Medical School; Düsseldorf; Germany
| | - R. Krauspe
- Orthopaedic Department; Heinrich-Heine-University Medical School; Düsseldorf; Germany
| | - M. Herten
- Orthopaedic Department; Heinrich-Heine-University Medical School; Düsseldorf; Germany
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Tátrai P, Sági B, Szigeti A, Szepesi A, Szabó I, Bősze S, Kristóf Z, Markó K, Szakács G, Urbán I, Mező G, Uher F, Német K. A novel cyclic RGD-containing peptide polymer improves serum-free adhesion of adipose tissue-derived mesenchymal stem cells to bone implant surfaces. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:479-488. [PMID: 23135412 DOI: 10.1007/s10856-012-4809-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 10/31/2012] [Indexed: 06/01/2023]
Abstract
Seeding of bone implants with mesenchymal stem cells (MSCs) may promote osseointegration and bone regeneration. However, implant material surfaces, such as titanium or bovine bone mineral, fail to support rapid and efficient attachment of MSCs, especially under serum-free conditions that may be desirable when human applications or tightly controlled experiments are envisioned. Here we demonstrate that a branched poly[Lys(Ser(i)-DL-Ala(m))] polymer functionalized with cyclic arginyl-glycyl-aspartate, when immobilized by simple adsorption to tissue culture plastic, surgical titanium alloy (Ti6Al4V), or Bio-Oss(®) bovine bone substitute, significantly accelerates serum-free adhesion and enhances seeding efficiency of human adipose tissue-derived MSCs. Moreover, when exposed to serum-containing osteogenic medium, MSCs survived and differentiated on the peptide-coated scaffolds. In summary, the presented novel polypeptide conjugate can be conveniently used for coating various surfaces, and may find applications whenever quick and efficient seeding of MSCs is required to various scaffolds in the absence of serum.
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Affiliation(s)
- Péter Tátrai
- Research Center for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
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Kim S, Kang Y, Krueger CA, Sen M, Holcomb JB, Chen D, Wenke JC, Yang Y. Sequential delivery of BMP-2 and IGF-1 using a chitosan gel with gelatin microspheres enhances early osteoblastic differentiation. Acta Biomater 2012; 8:1768-77. [PMID: 22293583 PMCID: PMC3314097 DOI: 10.1016/j.actbio.2012.01.009] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 12/22/2011] [Accepted: 01/10/2012] [Indexed: 01/27/2023]
Abstract
The purpose of this study was to develop and characterize a chitosan gel/gelatin microsphere (MSs) dual delivery system for sequential release of bone morphogenetic protein-2 (BMP-2) and insulin-like growth factor-1 (IGF-1) to enhance osteoblast differentiation in vitro. We made and characterized the delivery system based on its degree of cross-linking, degradation, and release kinetics. We also evaluated the cytotoxicity of the delivery system and the effect of growth factors on cell response using pre-osteoblast W-20-17 mouse bone marrow stromal cells. IGF-1 was first loaded into MSs, and then the IGF-1-containing MSs were encapsulated into the chitosan gel which contained BMP-2. Cross-linking of gelatin with glyoxal via Schiff bases significantly increased thermal stability and decreased the solubility of the MSs, leading to a significant decrease in the initial release of IGF-1. Encapsulation of the MSs into the chitosan gel generated polyelectrolyte complexes by intermolecular interactions, which further affected the release kinetics of IGF-1. This combinational delivery system provided an initial release of BMP-2 followed by a slow and sustained release of IGF-1. Significantly greater alkaline phosphatase activity was found in W-20-17 cells treated with the sequential delivery system compared with other treatments (P<0.05) after a week of culture.
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Affiliation(s)
- Sungwoo Kim
- Department of Orthopedic Surgery, Stanford University, Stanford, CA, USA
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Bone healing of commercial oral implants with RGD immobilization through electrodeposited poly(ethylene glycol) in rabbit cancellous bone. Acta Biomater 2011; 7:3222-9. [PMID: 21549863 DOI: 10.1016/j.actbio.2011.04.015] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 02/22/2011] [Accepted: 04/19/2011] [Indexed: 11/23/2022]
Abstract
Immobilization of RGD peptides on titanium (Ti) surfaces enhances implant bone healing by promoting early osteoblastic cell attachment and subsequent differentiation by facilitating integrin binding. Our previous studies have demonstrated the efficacy of RGD peptide immobilization on Ti surfaces through the electrodeposition of poly(ethylene glycol) (PEG) (RGD/PEG/Ti), which exhibited good chemical stability and bonding. The RGD/PEG/Ti surface promoted differentiation and mineralization of pre-osteoblasts. This study investigated the in vivo bone healing capacity of the RGD/PEG/Ti surface for biomedical application as a more osteoconductive implant surface in dentistry. The RGD/PEG/Ti surface was produced on an osteoconductive implant surface, i.e. the grit blasted micro-rough surface of a commercial oral implant. The osteoconductivity of the RGD/PEG/Ti surface was compared by histomorphometric evaluation with an RGD peptide-coated surface obtained by simple adsorption in rabbit cancellous bone after 2 and 4 weeks healing. The RGD/PEG/Ti implants displayed a high degree of direct bone apposition in cancellous bone and achieved greater active bone apposition, even in areas of poor surrounding bone. Significant increases in the bone to implant contact percentage were observed for RGD/PEG/Ti implants compared with RGD-coated Ti implants obtained by simple adsorption both after 2 and 4 weeks healing (P<0.05). These results demonstrate that RGD peptide immobilization on a Ti surface through electrodeposited PEG may be an effective method for enhancing bone healing with commercial micro-rough surface oral implants in cancellous bone by achieving rapid bone apposition on the implant surface.
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Senta H, Bergeron E, Drevelle O, Park H, Faucheux N. Combination of synthetic peptides derived from bone morphogenetic proteins and biomaterials for medical applications. CAN J CHEM ENG 2011. [DOI: 10.1002/cjce.20453] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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de Gabory L, Bareille R, Stoll D, Bordenave L, Fricain JC. Biphasic calcium phosphate to repair nasal septum: the first in vitro and in vivo study. Acta Biomater 2010; 6:909-19. [PMID: 19683601 DOI: 10.1016/j.actbio.2009.08.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2009] [Revised: 07/24/2009] [Accepted: 08/11/2009] [Indexed: 11/30/2022]
Abstract
Our objective was to evaluate the cytocompatibility and biocompatibility of biphasic calcium phosphate (BCP) in the nasal respiratory airway. In vitro, the attachment rate was quantified on BCP disks with normal human epithelial cells at 1, 3 and 24 h by determining N-acetyl beta-D-hexosaminidase activity. Proliferative activity of cells was indirectly assessed by MTT assay at 3, 9, 15 and 21 days. Plastic surfaces were used as positive control. In vivo, 15 rabbits underwent anterior nasal septum perforation and 10 septa were repaired with BCP disks. Five non-implanted animals were sacrificed at 3 months. Two groups of five implanted animals were sacrificed at 1 and 2 months. The surface of new airway mucosa covering BCP disks was evaluated macroscopically. During both steps, light microscopy, immunohistochemistry and scanning electron microscopy were performed. Statistical analysis was performed with the Mann-Whitney U-test. In vitro, at 1 and 3 h, the attachment rates were significantly better than on the plastic surface (p < 10(-2)). Mitochondrial activity increased on both surfaces but began 6 days later than on plastic. After 21 days of culture, cells were confluent and formed a monolayer covering the implant even in the bottom of the pores. In vivo, no perforations in the control group closed spontaneously. The mean rate of closure was 63% in the 1 month group and 64% in the 2 month group (p > 0.05). Implants were invaded by inflammatory reaction covered by incomplete differentiated respiratory epithelium. Throughout the study, all immunohistochemical findings remained positive. These data suggest a good affinity between BCP and nasal epithelial cells. BCP could be used to rebuild nasal septa.
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Affiliation(s)
- Ludovic de Gabory
- Unité 577 INSERM/Université Victor Segalen Bordeaux 2, 146 rue Léo-Saignat, F-33000, France.
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