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Boyd H, Gonzalez-Martinez JF, Welbourn RJL, Ma K, Li P, Gutfreund P, Klechikov A, Arnebrant T, Barker R, Sotres J. Effect of nonionic and amphoteric surfactants on salivary pellicles reconstituted in vitro. Sci Rep 2021; 11:12913. [PMID: 34155330 PMCID: PMC8217253 DOI: 10.1038/s41598-021-92505-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 06/11/2021] [Indexed: 11/15/2022] Open
Abstract
Surfactants are important components of oral care products. Sodium dodecyl sulfate (SDS) is the most common because of its foaming properties, taste and low cost. However, the use of ionic surfactants, especially SDS, is related to several oral mucosa conditions. Thus, there is a high interest in using non-ionic and amphoteric surfactants as they are less irritant. To better understand the performance of these surfactants in oral care products, we investigated their interaction with salivary pellicles i.e., the proteinaceous films that cover surfaces exposed to saliva. Specifically, we focused on pentaethylene glycol monododecyl ether (C12E5) and cocamidopropyl betaine (CAPB) as model nonionic and amphoteric surfactants respectively, and investigated their interaction with reconstituted salivary pellicles with various surface techniques: Quartz Crystal Microbalance with Dissipation, Ellipsometry, Force Spectroscopy and Neutron Reflectometry. Both C12E5 and CAPB were gentler on pellicles than SDS, removing a lower amount. However, their interaction with pellicles differed. Our work indicates that CAPB would mainly interact with the mucin components of pellicles, leading to collapse and dehydration. In contrast, exposure to C12E5 had a minimal effect on the pellicles, mainly resulting in the replacement/solubilisation of some of the components anchoring pellicles to their substrate.
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Affiliation(s)
- Hannah Boyd
- Biomedical Science Department, Biofilms-Research Center for Biointerfaces, Malmö University, 20506, Malmö, Sweden
| | - Juan F Gonzalez-Martinez
- Biomedical Science Department, Biofilms-Research Center for Biointerfaces, Malmö University, 20506, Malmö, Sweden
| | - Rebecca J L Welbourn
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Didcot, OX11 0QX, UK
| | - Kun Ma
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Didcot, OX11 0QX, UK
| | - Peixun Li
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Didcot, OX11 0QX, UK
| | - Philipp Gutfreund
- Institut Laue Langevin, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Alexey Klechikov
- Institut Laue Langevin, 71 Avenue des Martyrs, 38000, Grenoble, France
- Department of Physics and Astronomy, Uppsala University, 75120, Uppsala, Sweden
| | - Thomas Arnebrant
- Biomedical Science Department, Biofilms-Research Center for Biointerfaces, Malmö University, 20506, Malmö, Sweden
| | - Robert Barker
- School of Physical Sciences, University of Kent, Canterbury, CT2 7NZ, UK
| | - Javier Sotres
- Biomedical Science Department, Biofilms-Research Center for Biointerfaces, Malmö University, 20506, Malmö, Sweden.
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Boyd H, Gonzalez-Martinez JF, Welbourn RJL, Gutfreund P, Klechikov A, Robertsson C, Wickström C, Arnebrant T, Barker R, Sotres J. A comparison between the structures of reconstituted salivary pellicles and oral mucin (MUC5B) films. J Colloid Interface Sci 2020; 584:660-668. [PMID: 33198975 DOI: 10.1016/j.jcis.2020.10.124] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/06/2020] [Accepted: 10/27/2020] [Indexed: 01/01/2023]
Abstract
HYPOTHESIS Salivary pellicles i.e., thin films formed upon selective adsorption of saliva, protect oral surfaces against chemical and mechanical insults. Pellicles are also excellent aqueous lubricants. It is generally accepted that reconstituted pellicles have a two-layer structure, where the outer layer is mainly composed of MUC5B mucins. We hypothesized that by comparing the effect of ionic strength on reconstituted pellicles and MUC5B films we could gain further insight into the pellicle structure. EXPERIMENTS Salivary pellicles and MUC5B films reconstituted on solid surfaces were investigated at different ionic strengths by Force Spectroscopy, Quartz Crystal Microbalance with Dissipation, Null Ellipsometry and Neutron Reflectometry. FINDINGS Our results support the two-layer structure for reconstituted salivary pellicles. The outer layer swelled when ionic strength decreased, indicating a weak polyelectrolyte behavior. While initially the MUC5B films exhibited a similar tendency, this was followed by a drastic collapse indicating an interaction between exposed hydrophobic domains. This suggests that mucins in the pellicle outer layer form complexes with other salivary components that prevent this interaction. Lowering ionic strength below physiological values also led to a partial removal of the pellicle inner layer. Overall, our results highlight the importance that the interactions of mucins with other pellicle components play on their structure.
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Affiliation(s)
- Hannah Boyd
- Department of Biomedical Science & Biofilms-Research Center for Biointerfaces, Malmö University, 20506 Malmö, Sweden.
| | - Juan F Gonzalez-Martinez
- Department of Biomedical Science & Biofilms-Research Center for Biointerfaces, Malmö University, 20506 Malmö, Sweden
| | - Rebecca J L Welbourn
- ISIS Facility, STFC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK
| | - Philipp Gutfreund
- Institut Laue Langevin, 71 avenue des Martyrs, Grenoble 38000, France
| | - Alexey Klechikov
- Institut Laue Langevin, 71 avenue des Martyrs, Grenoble 38000, France; Department of Physics and Astronomy, Uppsala University, 75120 Uppsala, Sweden
| | - Carolina Robertsson
- Department of Oral Biology and Pathology & Biofilms-Research Center for Biointerfaces, Malmö University, 20506 Malmö, Sweden
| | - Claes Wickström
- Department of Oral Biology and Pathology & Biofilms-Research Center for Biointerfaces, Malmö University, 20506 Malmö, Sweden
| | - Thomas Arnebrant
- Department of Biomedical Science & Biofilms-Research Center for Biointerfaces, Malmö University, 20506 Malmö, Sweden
| | - Robert Barker
- School of Physical Sciences, University of Kent, Canterbury, Kent CT2 7NH, UK
| | - Javier Sotres
- Department of Biomedical Science & Biofilms-Research Center for Biointerfaces, Malmö University, 20506 Malmö, Sweden.
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Cui Z, Lin J, Zhan C, Wu J, Shen S, Si J, Wang Q. Biomimetic composite scaffolds based on surface modification of polydopamine on ultrasonication induced cellulose nanofibrils (CNF) adsorbing onto electrospun thermoplastic polyurethane (TPU) nanofibers. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 31:561-577. [DOI: 10.1080/09205063.2019.1705534] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Zhixiang Cui
- School of Materials Science and Engineering, Fujian University of Technology, Fujian, China
- Fujian Provincial Key Laboratory of Advanced Materials Processing and Application, Fujian, China
- Fujian Provincial Engineering Research Center of Die & Mold, Fujian University of Technology, Fujian, China
| | - Jixin Lin
- School of Materials Science and Engineering, Fujian University of Technology, Fujian, China
- Fujian Provincial Key Laboratory of Advanced Materials Processing and Application, Fujian, China
- Fujian Provincial Engineering Research Center of Die & Mold, Fujian University of Technology, Fujian, China
| | - Conghua Zhan
- School of Materials Science and Engineering, Fujian University of Technology, Fujian, China
- Fujian Provincial Key Laboratory of Advanced Materials Processing and Application, Fujian, China
- Fujian Provincial Engineering Research Center of Die & Mold, Fujian University of Technology, Fujian, China
| | - Jiahui Wu
- School of Materials Science and Engineering, Fujian University of Technology, Fujian, China
- Fujian Provincial Key Laboratory of Advanced Materials Processing and Application, Fujian, China
- Fujian Provincial Engineering Research Center of Die & Mold, Fujian University of Technology, Fujian, China
| | - Shuai Shen
- School of Materials Science and Engineering, Fujian University of Technology, Fujian, China
- Fujian Provincial Key Laboratory of Advanced Materials Processing and Application, Fujian, China
- Fujian Provincial Engineering Research Center of Die & Mold, Fujian University of Technology, Fujian, China
| | - Junhui Si
- School of Materials Science and Engineering, Fujian University of Technology, Fujian, China
- Fujian Provincial Key Laboratory of Advanced Materials Processing and Application, Fujian, China
- Fujian Provincial Engineering Research Center of Die & Mold, Fujian University of Technology, Fujian, China
| | - Qianting Wang
- School of Materials Science and Engineering, Fujian University of Technology, Fujian, China
- Fujian Provincial Key Laboratory of Advanced Materials Processing and Application, Fujian, China
- Fujian Provincial Engineering Research Center of Die & Mold, Fujian University of Technology, Fujian, China
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4
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Varnier K, Vieira T, Wolf M, Belfiore LA, Tambourgi EB, Paulino AT. Polysaccharide-based hydrogels for the immobilization and controlled release of bovine serum albumin. Int J Biol Macromol 2018; 120:522-528. [DOI: 10.1016/j.ijbiomac.2018.08.133] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 07/12/2018] [Accepted: 08/25/2018] [Indexed: 10/28/2022]
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Hiller KA, Buchalla W, Grillmeier I, Neubauer C, Schmalz G. In vitro effects of hydroxyapatite containing toothpastes on dentin permeability after multiple applications and ageing. Sci Rep 2018; 8:4888. [PMID: 29559639 PMCID: PMC5861090 DOI: 10.1038/s41598-018-22764-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 02/28/2018] [Indexed: 01/07/2023] Open
Abstract
This in vitro study evaluated the effect of toothpastes with different active ingredients on dentin permeability using an extended protocol including multiple applications and several thermal ageing cycles in the presence or absence of human saliva. The Null hypothesis was that dentin permeability of a hydroxyapatite containing toothpaste (BR), a potassium nitrate (SP) and an arginine and calcium carbonate (EH) containing toothpaste were similar. Dentin permeability was measured as hydraulic conductance using a commercially available capillary flow system (Flodec, Geneva) and results were expressed as % relative to matching controls. Without saliva, the ranking (best first) of dentin permeability was BR(61%) < SP(87%) < EH(118%), with saliva EH(63%) < SP(72%) < BR(88%). Saliva increased or decreased permeability dependent upon the test material. BR reduced dentin permeability significantly more in absence of saliva, with saliva EH was superior to BR. Repeated material application decreased and thermal ageing increased dentin permeability. The different tooth pastes reduced permeability differently, the best being BR without saliva, the least EH without saliva. The newly introduced test conditions (ageing, saliva, multiple applications) influenced single results significantly, and as they better simulate the in vivo situation they should be considered to be included in further in vitro permeability testing of desensitizing preparations.
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Affiliation(s)
- Karl-Anton Hiller
- Department of Conservative Dentistry and Periodontology, University of Regensburg Medical Center, Regensburg, Germany.
| | - Wolfgang Buchalla
- Department of Conservative Dentistry and Periodontology, University of Regensburg Medical Center, Regensburg, Germany
| | - Isabel Grillmeier
- Department of Conservative Dentistry and Periodontology, University of Regensburg Medical Center, Regensburg, Germany.,Private Practice, Nürnberg, Germany
| | - Christina Neubauer
- Department of Conservative Dentistry and Periodontology, University of Regensburg Medical Center, Regensburg, Germany.,Private Practices, Riedenburg and Regensburg, Germany
| | - Gottfried Schmalz
- Department of Conservative Dentistry and Periodontology, University of Regensburg Medical Center, Regensburg, Germany.,Department of Periodontology, School of Dental Medicine, Bern, Switzerland
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Duce C, Della Porta V, Bramanti E, Campanella B, Spepi A, Tiné MR. Loading of halloysite nanotubes with BSA, α-Lac and β-Lg: a Fourier transform infrared spectroscopic and thermogravimetric study. NANOTECHNOLOGY 2017; 28:055706. [PMID: 28029112 DOI: 10.1088/1361-6528/28/5/055706] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Halloysite nanotubes (HNTs) are considered as ideal materials for biotechnological and medical applications. An important feature of halloysite is that it has a different surface chemistry on the inner and outer sides of the tubes. This property means that negatively-charged molecules can be selectively loaded inside the halloysite nanoscale its lumen. Loaded HNTs can be used for the controlled or sustained release of proteins, drugs, bioactive molecules and other agents. We studied the interaction between HNTs and bovine serum albumin, α lactalbumin and β -lactoglobulin loaded into HTNs using Fourier transform infrared spectroscopy and thermogravimetry. These techniques enabled us to study the protein conformation and thermal stability, respectively, and to estimate the amount of protein loaded into the HNTs. TEM images confirmed the loading of proteins into HTNs.
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Affiliation(s)
- Celia Duce
- University of Pisa, Department of Chemistry and Industrial Chemistry, Via G. Moruzzi 13, I-56124 Pisa, Italy
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Zhao L, Peng X, Yang S, Zhang Y, Wu J, Wei X, Li F, Pu Q. Facile real-time evaluation of the stability of surface charge under regular shear stress by pulsed streaming potential measurement. RSC Adv 2015. [DOI: 10.1039/c5ra12501d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The applicability of the pulsed streaming potential measurement for real-time evaluation of stability of assembled layers based on the relative zeta potential change rate SR was demonstrated.
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Affiliation(s)
- Lei Zhao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Xianglu Peng
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Shenghong Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Yuan Zhang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Jing Wu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Xuan Wei
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Fengyun Li
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
| | - Qiaosheng Pu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- Department of Chemistry
- Lanzhou University
- Lanzhou
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8
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Effects of peptide concentration on remineralization of eroded enamel. J Mech Behav Biomed Mater 2013; 28:213-21. [DOI: 10.1016/j.jmbbm.2013.08.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 07/11/2013] [Accepted: 08/04/2013] [Indexed: 11/23/2022]
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9
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Sotres J, Barrantes A, Lindh L, Arnebrant T. Strategies for a direct characterization of phosphoproteins on hydroxyapatite surfaces. Caries Res 2013; 48:98-110. [PMID: 24296726 DOI: 10.1159/000351871] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 05/08/2013] [Indexed: 11/19/2022] Open
Abstract
We show in this work how systems formed by phosphoproteins on calcium phosphate surfaces can be directly characterized, in real time, in liquid medium, without the need for elution or labeling. Specifically, we show how this is possible by applying three different techniques: ellipsometry, quartz crystal microbalance with dissipation, and atomic force microscopy-based friction force spectroscopy. We apply these techniques to study two different model systems, i.e. those formed upon the adsorption of two model phosphoproteins (κ- and β-casein) on hydroxyapatite (HA) surfaces. Information on the kinetics of adsorption, surface excess, viscoelasticity, water content, thickness of the layers, and protein-surface interaction is provided. Results indicate that both phosphoproteins form homogeneous elastic highly hydrated monolayers on the HA surfaces, the strength of β-casein layers being higher by approximately a factor of 4. Based on the experimental results, models for the conformation of κ- and β-casein molecules adsorbed on HA surfaces are proposed.
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Affiliation(s)
- J Sotres
- Biomedical Sciences, Faculty of Health and Society, Malmö University, Malmö, Sweden
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10
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Akkaya B. Separation of lysozyme with magnetically stabilized spherical hydroxyapatite microcomposites in a continuous flow system. J Appl Polym Sci 2013. [DOI: 10.1002/app.39289] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Birnur Akkaya
- Department of Molecular Biology and Genetics; Cumhuriyet University; Sivas; 58140; Turkey
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11
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Chung HY, Li CC. Microstructure and nanomechanical properties of enamel remineralized with asparagine-serine-serine peptide. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 33:969-73. [PMID: 25427512 DOI: 10.1016/j.msec.2012.11.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 11/01/2012] [Accepted: 11/16/2012] [Indexed: 10/27/2022]
Abstract
A highly biocompatible peptide, triplet repeats of asparagine-serine-serine (3 NSS) was designed to regulate mineral deposition from aqueous ions in saliva for the reconstruction of enamel lesions. Healthy human enamel was sectioned and acid demineralized to create lesions, then exposed to the 3 NSS peptide solution, and finally immersed in artificial saliva for 24h. The surface morphology and roughness were examined using scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively. X-ray diffraction (XRD) was used to identify the phases and crystallinity of the deposited minerals observed on the enamel surface. Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) was used to quantitatively analyze the mineral variation by calculating the relative integrated-area of characteristic bands. Nanohardness and elastic modulus measured by nanoindentation at various treatment stages were utilized to evaluate the degree of recovery. Biomimetic effects were accessed according to the degree of nanohardness recovery and the amount of hydroxyapatite deposition. The charged segments in the 3 NSS peptide greatly attracted aqueous ions from artificial saliva to form hydroxyapatite crystals to fill enamel caries, in particular the interrod areas, resulting in a slight reduction in overall surface roughness. Additionally, the deposited hydroxyapatites were of a small crystalline size in the presence of the 3 NSS peptide, which effectively restrained the plastic deformations and thus resulted in greater improvements in nanohardness and elastic modulus. The degree of nanohardness recovery was 5 times greater for remineralized enamel samples treated with the 3 NSS peptide compared to samples without peptide treatment.
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Affiliation(s)
- Hsiu-Ying Chung
- Department of Materials Science and Engineering, Feng Chia University, Taichung 407, Taiwan.
| | - Cheng Che Li
- Department of Materials Science and Engineering, Feng Chia University, Taichung 407, Taiwan
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12
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K-hasuwan PR, Kuanchertchoo N, Wetprasit N, Supaphol P. Hydroxyapatite/ovalbumin composite particles as model protein carriers for bone tissue engineering: I. Synthesis and characterization. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.01.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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14
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Svendsen IE, Santos O, Sotres J, Wennerberg A, Breding K, Arnebrant T, Lindh L. Adsorption of HSA, IgG and laminin-1 on model hydroxyapatite surfaces--effects of surface characteristics. BIOFOULING 2012; 28:87-97. [PMID: 22257270 DOI: 10.1080/08927014.2011.653562] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Ellipsometry and mechanically assisted sodium dodecyl sulphate elution was utilized to study the adsorption of human serum albumin (HSA), human immunoglobulin G (IgG), and laminin-1, as well as competitive adsorption from a mixture of these proteins on spin-coated and sintered hydroxyapatite (HA) surfaces, respectively. The HA surfaces were characterized with respect to wettability and roughness by means of water contact angles and atomic force microscopy, respectively. Both surface types were hydrophilic, and the average roughness (Sa) and surface enlargement (Sdr) were lower for the sintered compared to the spin-coated HA surfaces. The adsorbed amounts on the sintered HA increased as follows: HSA < laminin-1 < IgG < the protein mixture. For the competitive adsorption experiments, the adsorbed fractions increased accordingly: HSA < laminin-1 < IgG on both types of HA substratum. However, a higher relative amount of HSA and laminin-1 and a lower relative amount of IgG was found on the spin-coated surfaces compared to the sintered surfaces. The effects observed could be ascribed to differences in surface roughness and chemical composition between the two types of HA substratum, and could have an influence on selection of future implant surface coatings.
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Affiliation(s)
- Ida E Svendsen
- Prosthetic Dentistry, Faculty of Odontology, Malmö University, Malmö, Sweden.
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15
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Robin S, Gandhi AA, Gregor M, Laffir FR, Plecenik T, Plecenik A, Soulimane T, Tofail SAM. Charge specific protein placement at submicrometer and nanometer scale by direct modification of surface potential by electron beam. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14968-14974. [PMID: 22060966 DOI: 10.1021/la203491q] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The understanding and the precise control of protein adsorption is extremely important for the development and optimization of biomaterials. The challenge resides in controlling the different surface properties, such as surface chemistry, roughness, wettability, or surface charge, independently, as modification of one property generally affects the other. We demonstrate the creation of electrically modified patterns on hydroxyapatite by using scanning electron beam to tailor the spatial regulation of protein adsorption via electrostatic interactions without affecting other surface properties of the material. We show that domains, presenting modulated surface potential, can be created to precisely promote or reduce protein adsorption.
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Affiliation(s)
- Sylvain Robin
- Chemical and Environmental Science Department and Materials and Surface Science Institute, University of Limerick, Limerick, Ireland
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16
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Santos O, Lindh L, Halthur T, Arnebrant T. Adsorption from saliva to silica and hydroxyapatite surfaces and elution of salivary films by SDS and delmopinol. BIOFOULING 2010; 26:697-710. [PMID: 20672200 DOI: 10.1080/08927014.2010.506609] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The adsorption of proteins from human whole saliva (HWS) onto silica and hydroxyapatite surfaces (HA) was followed by quartz crystal microbalance with dissipation (QCM-D) and ellipsometry. The influence of different surface properties and adsorption media (water and PBS) on the adsorption from saliva was studied. The viscoelastic properties of the salivary films formed on the solid surfaces were estimated by the use of the Voigt-based viscoelastic film model. Furthermore, the efficiency of SDS and delmopinol to elute the adsorbed salivary film from the surfaces was investigated at different surfactant concentrations. A biphasic kinetic regime for the adsorption from saliva on the silica and HA surfaces was observed, indicating the formation of a rigidly coupled first layer corresponding to an initial adsorption of small proteins and a more loosely bound second layer. The results further showed a higher adsorption from HWS onto the HA surfaces compared to the silica surfaces in both adsorption media (PBS and water). The adsorption in PBS led to higher adsorbed amounts on both surfaces as compared to water. SDS was found to be more efficient in removing the salivary film from both surfaces than delmopinol. The salivary film was found to be less tightly bound onto the silica surfaces since more of the salivary film could be removed with both SDS and delmopinol compared to that from the HA surface. When adsorption took place from PBS the salivary layer formed at both surfaces seemed to have a similar structure, with a high energy dissipation implying that a softer salivary layer is built up in PBS as opposed to that in water. Furthermore, the salivary layers adsorbed from water solutions onto the HA were found to be softer than those on silica.
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Affiliation(s)
- Olga Santos
- Biomedical Laboratory Science & Biomedical Technology, Faculty of Health and Society, Malmo University, Malmo, Sweden.
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17
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Xu C, He D, Zeng L, Luo S. A study of adsorption behavior of human serum albumin and ovalbumin on hydroxyapatite/chitosan composite. Colloids Surf B Biointerfaces 2009; 73:360-4. [DOI: 10.1016/j.colsurfb.2009.06.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2009] [Revised: 05/15/2009] [Accepted: 06/03/2009] [Indexed: 11/25/2022]
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18
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Lu YP, Chen YM, Li ST, Wang JH. Surface nanocrystallization of hydroxyapatite coating. Acta Biomater 2008; 4:1865-72. [PMID: 18567551 DOI: 10.1016/j.actbio.2008.05.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2007] [Revised: 05/12/2008] [Accepted: 05/14/2008] [Indexed: 11/28/2022]
Abstract
Nanocharactered biomaterials, such as nanopowders, nanocrystalline compacts and nanostructured films, as well as materials with nanoscale roughness, have attracted much attention recently, due to their clear effects on cell response. Surface nanocrystallization of plasma-sprayed hydroxyapatite (HA) coating can be realized by conventional post-heat treatment. This study reveals that 20-30nm nanocrystals formed on HA coatings post-heat treated at 650 degrees C, and the increase in holding time increased the number of surface nanocrystals and intensified their aggregation. Hard aggregation occurred when HA coatings were repetitively post-heat treated. This indicates that the surface nanocrystallization is controllable. Cell experiments were carried out with rat calvarial osteoblasts. The post-heat treated HA coatings exhibit an obviously better osteoblast response than the as-sprayed coatings. Well-flattened cells attached themselves to the coating surfaces, with a good interaction between their filopodia and the nanocrystallized region. It is proposed that the surface nanocrystallization should be taken into account when the post-heat treatment process is introduced for the fabrication of HA coatings.
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Affiliation(s)
- Yu-Peng Lu
- School of Materials Science and Engineering, Shandong University, Ji'nan 250061, China.
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Kothapalli CR, Wei M, Shaw MT. Solvent-specific gel-like transition via complexation of polyelectrolyte and nanoparticles suspended in - mixtures: a rheological study. SOFT MATTER 2008; 4:600-605. [PMID: 32907227 DOI: 10.1039/b713331f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polyelectrolytes are routinely used in many applications including hydrogels and aqueous particle suspensions. Although the rheology of charge-stabilized colloidal particle systems involving polyelectrolyte in a single solvent has been studied both theoretically and experimentally, the influence of a second solvent has received considerably less attention. We report here on the system comprising ellipsoidal nano-hydroxyapatite particles suspended in water-glycerol mixtures containing dissolved polyelectrolyte "dispersant." The nano-hydroxyapatite content ranged from 0 to 20 vol%, while the concentration of the neutralized poly(acrylic acid) dispersant was varied between 0 to 0.08 wt% in the suspension (0 to 0.108% with respect to the HA component). In contrast to earlier reports on similar suspensions, an increase in apparent viscosity by three orders of magnitude with increasing polyelectrolyte content was observed. At the highest concentrations of polyelectrolyte, the suspensions exhibited solid-like behavior as indicated by the presence of a yield behavior and a shear storage modulus one order of magnitude larger than the loss modulus. These observations led to the hypothesis that the polyelectrolyte contributed to the formation of polymer-rich water bridges between the particles, although no macrophase separation was found in the absence of the particles.
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Affiliation(s)
- Chandrasekhar R Kothapalli
- Materials Science and Engineering Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA
| | - Mei Wei
- Materials Science and Engineering Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA and Chemical, Materials and Biomolecular Engineering Department, University of Connecticut, Storrs, CT 06269-3222, USA
| | - Montgomery T Shaw
- Chemical, Materials and Biomolecular Engineering Department, University of Connecticut, Storrs, CT 06269-3222, USA and Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA.
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Santos O, Kosoric J, Hector MP, Anderson P, Lindh L. Adsorption behavior of statherin and a statherin peptide onto hydroxyapatite and silica surfaces by in situ ellipsometry. J Colloid Interface Sci 2008; 318:175-82. [DOI: 10.1016/j.jcis.2007.11.015] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2007] [Revised: 11/13/2007] [Accepted: 11/13/2007] [Indexed: 10/22/2022]
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Chen WY, Lin MS, Lin PH, Tasi PS, Chang Y, Yamamoto S. Studies of the interaction mechanism between single strand and double-strand DNA with hydroxyapatite by microcalorimetry and isotherm measurements. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.09.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Skartsila K, Spanos N. Physicochemical characterization of variously packed porous plugs of hydroxyapatite: streaming potential coupled with conductivity measurements. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:1903-10. [PMID: 16460126 DOI: 10.1021/la0524622] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A homemade instrument was used for the measurement of the streaming potential, conductivity, and permeability of plugs packed in different densities with hydroxyapatite (HAP) particles at 25 degrees C and pH = 7.0 +/- 0.2. KCl solutions with ionic strength values in the range of 0.3-300 mM, equilibrated with HAP for 3 days, were forced to flow through the plugs. It was found that the particle volume fraction of the plug obtained from conductivity measurements was slightly higher than that obtained by weighing the solid. This suggested that, in addition to the volume of the solid itself, the volume of liquid trapped in the cavities of the particles does not contribute to the conductivity of the plug. The pH change recorded in the solution passed through the plug was attributed to the protonation/deprotonation of the HAP surface groups. Denser packing of the HAP crystallites resulted to higher surface conductivities. It was suggested that this trend was due to the easier interparticle ion transport in close-packed plugs. Considering zeta-potential, the values computed by neglecting surface conductivity were significantly underestimated, especially at low ionic strength values and at dense packing. More realistic values for the HAP zeta-potential were obtained taking into account the surface conductivity. These values were practically independent of the material packing during the plug preparation. Finally, the total surface conductivity was found to be limited behind the slipping plane of the electric double layer developed at the interface of HAP in contact with electrolyte solution.
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Affiliation(s)
- Kyriaki Skartsila
- School of Science and Technology, Hellenic Open University, 262 23 Patras, Greece
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Matsumura H, Saburi M. Protein adsorption and wetting of the protein adsorbed surfaces studied by a new type of laser reflectometer. Colloids Surf B Biointerfaces 2006; 47:146-52. [PMID: 16426821 DOI: 10.1016/j.colsurfb.2005.12.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2005] [Revised: 12/01/2005] [Accepted: 12/11/2005] [Indexed: 11/26/2022]
Abstract
We have devised a new type of laser reflectometer that can measure adsorption behavior of (bio)-polymers, such as proteins, on the substrate surface and also the wetting for the surface of adsorbed layer of such (bio)-polymers. The adsorption and the wetting experiments can be conducted in a sequential manner using the same sample by this apparatus. So, the wetting of the surface of protein-adsorbed layer can be measured in virtually intact state. The reflectometry is based on the traditional optical polarimetry and the wetting measurement is due to the dropping time method (DTM) that has been reported before by the authors. The two methods are combined in an apparatus and hence we can correlate the wetting of protein layer adsorbed on the substrate surfaces with the amounts of protein molecules on the surface. As a model case we demonstrate the adsorption of several typical water soluble globular proteins on stainless steel surfaces. For this combination of the adsorbent with adsorbates, it is found that the water wetting of the protein adsorbed surface is closely related with the adsorbed amounts of proteins not depending on species.
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Affiliation(s)
- Hideo Matsumura
- National Institute of Advanced Industrial Science & Technology, Photonics Research Institute, Central 2, Tsukuba 305-8568, Japan.
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Gupta Y, Mathur GN, Verma S. Biomimetic synthesis and ultrastructural characterization of a zerovalent gold–hydroxyapatite composite. Bioorg Med Chem Lett 2006; 16:363-6. [PMID: 16260135 DOI: 10.1016/j.bmcl.2005.09.074] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2005] [Revised: 09/21/2005] [Accepted: 09/28/2005] [Indexed: 10/25/2022]
Abstract
This manuscript describes one-pot, in situ synthesis of organoapatite-gold nanoparticle composite and its characterization by XRD, energy dispersive X-ray analysis, atomic force, and scanning electron microscopy. This methodology offers a different approach into the synthesis of zerovalent metal-mineral-phase nanocomposites having potential application as osteointegrative ceramics.
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Affiliation(s)
- Yogita Gupta
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, UP, India
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Boix T, Gómez-Morales J, Torrent-Burgués J, Monfort A, Puigdomènech P, Rodríguez-Clemente R. Adsorption of recombinant human bone morphogenetic protein rhBMP-2m onto hydroxyapatite. J Inorg Biochem 2005; 99:1043-50. [PMID: 15833327 DOI: 10.1016/j.jinorgbio.2005.01.011] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Revised: 01/07/2005] [Accepted: 01/18/2005] [Indexed: 11/18/2022]
Abstract
Recombinant human mature bone morphogenetic protein 2 (rhBMP-2m) has been expressed to study its adsorption onto precipitated hydroxyapatite (HA). The influence on the adsorption process of different parameters such as pH and concentrations of calcium, phosphate or NaCl has been investigated. Although the adsorption proceeds rapidly at the initial stages, the maximum adsorbed amount is reached after four hours. The process is notably influenced by adding calcium or phosphate to the system but, while calcium ions increase the adsorption of rhBMP-2m onto HA, phosphate ions inhibit it. The influence of pH and NaCl concentration are notable but less important than those of calcium and phosphate. The adsorption data fit well to a Langmuir adsorption isotherm. The values of the isotherm parameters have been calculated and discussed, and an adsorption mechanism has been proposed.
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Affiliation(s)
- T Boix
- Institut de Ciència de Materials de Barcelona, CSIC. Campus UAB, 08193 Bellaterra, Spain
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Figueiredo KCDS, Salim VMM, Alves TLM, Pinto JC. Lysozyme Adsorption onto Different Supports: A Comparative Study. ADSORPTION 2005. [DOI: 10.1007/s10450-005-4904-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kawasaki K, Kambara M, Matsumura H, Norde W. Protein adsorption at polymer-grafted surfaces: comparison between a mixture of saliva proteins and some well-defined model proteins. BIOFOULING 2003; 19:355-363. [PMID: 14768464 DOI: 10.1080/08927010310001615853] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Grafting a dense layer of soluble polymers onto a surface is a well-established method for controlling protein adsorption. In the present study, polyethylene oxide (PEO) layers of three different grafting densities were prepared, i.e. 10-15 nm2, 5.5 nm2 and 4 nm2 per polymer chain, respectively. The adsorption of different proteins on the PEO grafted surfaces was measured in real time by reflectometry. Furthermore, the change of the zeta-potential of such surfaces resulting from adsorption of the proteins was determined using the streaming potential method. Both the protein adsorption and the zeta-potential were monitored for 1 h after exposure of the protein solution to the surface. The adsorption pattern for a mixture of saliva proteins was compared to those observed for a number of well-defined model-proteins (lysozyme, human serum albumin, beta-lactoglobulin and ovalbumin). The results of the adsorption kinetics and streaming potential measurements indicate that the effect of the PEO layer on protein adsorption primarily depends on the size and the charge of the protein molecules. The saliva proteins are strongly blocked for adsorption, whereas the change in the zeta-potential is larger than for the other proteins (except lysozyme). It is concluded that positively charged protein molecules, having dimensions larger than those of lysozyme, are involved in the initial stage of adsorption from saliva onto a negatively charged surface.
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Affiliation(s)
- K Kawasaki
- Osaka Dental University, 8-1, Kuzuhahanazono-cho, Hirakata-shi, Osaka, 573-1121, Japan.
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