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Hobæk TC, Pranov HJ, Larsen NB. Immobilization of Active Antibodies at Polymer Melt Surfaces during Injection Molding. Polymers (Basel) 2022; 14:polym14204426. [PMID: 36298004 PMCID: PMC9606872 DOI: 10.3390/polym14204426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/17/2022] [Accepted: 10/18/2022] [Indexed: 11/24/2022] Open
Abstract
We demonstrate the transfer and immobilization of active antibodies from a low surface- energy mold surface to thermoplastic replica surfaces using injection molding, and we investigate the process at molecular scale. The transfer process is highly efficient, as verified by atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) of the mold and replica surfaces. AFM analysis reveals partial nanometer-scale embedding of the protein into the polymer matrix as a possible mechanism of permanent immobilization. Replicas with rabbit anti-mouse IgG immobilized as capture antibody at the hot polymer melt surface during injection molding show similar affinity for their antigen (mouse IgG) in sandwich enzyme-linked immunosorbent assay (ELISA) as capture antibodies deposited by passive adsorption onto a bare thermoplastic replica. The transferred antibodies retain their functionality after incubation in serum-containing cell medium for >1 week. A mold coating time of 10 min prior to injection molding is sufficient for producing highly sensitive ELISA assays, thus enabling the short processing cycle times required for mass production of single-use biodevices relying on active immobilized antibodies.
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Affiliation(s)
- Thor Christian Hobæk
- Department of Health Technology, DTU Health Tech, Technical University of Denmark, Ørsteds Plads 345C, 2800 Kongens Lyngby, Denmark
| | | | - Niels B. Larsen
- Department of Health Technology, DTU Health Tech, Technical University of Denmark, Ørsteds Plads 345C, 2800 Kongens Lyngby, Denmark
- Correspondence:
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2
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Probing fibronectin adsorption on chemically defined surfaces by means of single molecule force microscopy. Sci Rep 2020; 10:15662. [PMID: 32973270 PMCID: PMC7518417 DOI: 10.1038/s41598-020-72617-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 09/02/2020] [Indexed: 12/18/2022] Open
Abstract
Atomic force microscope (AFM) based single molecule force spectroscopy (SMFS) and a quartz crystal microbalance (QCM) were respectively employed to probe interfacial characteristics of fibronectin fragment FNIII8–14 and full-length fibronectin (FN) on CH3–, OH–, COOH–, and NH2-terminated alkane-thiol self-assembled monolayers (SAMs). Force-distance curves acquired between hexahistidine-tagged FNIII8–14 immobilised on trisNTA-Ni2+ functionalized AFM cantilevers and the OH and COOH SAM surfaces were predominantly ‘loop-like’ (76% and 94% respectively), suggesting domain unfolding and preference for ‘end-on’ oriented binding, while those generated with NH2 and CH3 SAMs were largely ‘mixed type’ (81% and 86%, respectively) commensurate with unravelling and desorption, and ‘side-on’ binding. Time-dependent binding of FN to SAM-coated QCM crystals occurred in at least two phases: initial rapid coverage over the first 5 min; and variably diminishing adsorption thereafter (5–70 min). Loading profiles and the final hydrated surface concentrations reached (~ 950, ~ 1200, ~ 1400, ~ 1500 ng cm−2 for CH3, OH, COOH and NH2 SAMs) were consistent with: space-filling ‘side-on’ orientation and unfolding on CH3 SAM; greater numbers of FN molecules arranged ‘end-on’ on OH and especially COOH SAMs; and initial ‘side-on’ contact, followed by either (1) gradual tilting to a space-saving ‘end-on’ configuration, or (2) bi-/multi-layer adsorption on NH2 SAM.
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Shao H, Wu YC, Lin Z, Taberna PL, Simon P. Nanoporous carbon for electrochemical capacitive energy storage. Chem Soc Rev 2020; 49:3005-3039. [DOI: 10.1039/d0cs00059k] [Citation(s) in RCA: 213] [Impact Index Per Article: 53.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This review summarizes the recent advances of nanoporous carbon materials in the application of EDLCs, including a better understanding of the charge storage mechanisms by combining the advanced techniques and simulations methods.
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Affiliation(s)
- Hui Shao
- Université Paul Sabatier
- CIRIMAT UMR CNRS 5085
- 31062 Toulouse
- France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E)
| | - Yih-Chyng Wu
- Université Paul Sabatier
- CIRIMAT UMR CNRS 5085
- 31062 Toulouse
- France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E)
| | - Zifeng Lin
- College of Materials Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Pierre-Louis Taberna
- Université Paul Sabatier
- CIRIMAT UMR CNRS 5085
- 31062 Toulouse
- France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E)
| | - Patrice Simon
- Université Paul Sabatier
- CIRIMAT UMR CNRS 5085
- 31062 Toulouse
- France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E)
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Al-Husseini JK, Stanton NJ, Selassie CRD, Johal MS. The Binding of Drug Molecules to Serum Albumin: The Effect of Drug Hydrophobicity on Binding Strength and Protein Desolvation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:17054-17060. [PMID: 31790590 DOI: 10.1021/acs.langmuir.9b02318] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, dual polarization interferometry (DPI) and quartz crystal microgravimetry with dissipation monitoring (QCM-D) were used to examine the binding characteristics and structure-activity relationships of 12 common drugs on a model bovine serum albumin (BSA) film. By taking advantage of the different hydration sensitivities of DPI and QCM-D, we were able to quantify changes in the solvent state upon drug binding to BSA. Quantifying the changes in water mass within binding pockets and upon drug-protein binding allows for a more complete understanding of binding phenomena between drug molecules and serum proteins. For the drugs tested, a quantitative structure-activity relationship (QSAR) was used to establish a correlation between drug binding (KD) and hydrophobicity (ClogP), with the latter being related to the drug's ability to desolvate the BSA upon binding. Understanding these relationships provides insight into the role of water at the protein-ligand interface and is of particular importance in the area of ligand binding within the field of drug design. This study underscores the importance of hydrophobicity to drug binding kinetics and may be used to further understand and improve drug design and delivery protocols.
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Affiliation(s)
- Jacob K Al-Husseini
- Department of Chemistry , Pomona College , 645 N. College Avenue , Claremont , California 91711 , United States
| | - Noah J Stanton
- Department of Chemistry , Pomona College , 645 N. College Avenue , Claremont , California 91711 , United States
| | - Cynthia R D Selassie
- Department of Chemistry , Pomona College , 645 N. College Avenue , Claremont , California 91711 , United States
| | - Malkiat S Johal
- Department of Chemistry , Pomona College , 645 N. College Avenue , Claremont , California 91711 , United States
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5
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Adjustment and Measurement of Contact Angle with Electrowetting on a Quartz-Crystal Microbalance. INVENTIONS 2018. [DOI: 10.3390/inventions3030046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Su J, Esmaeilzadeh H, Zhang F, Yu Q, Cernigliaro G, Xu J, Sun H. An ultrasensitive micropillar-based quartz crystal microbalance device for real-time measurement of protein immobilization and protein-protein interaction. Biosens Bioelectron 2018; 99:325-331. [DOI: 10.1016/j.bios.2017.07.074] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/27/2017] [Accepted: 07/30/2017] [Indexed: 10/19/2022]
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A Review of Techniques to Measure Protein Sorption to Soft Contact Lenses. Eye Contact Lens 2017; 43:276-286. [PMID: 28198731 DOI: 10.1097/icl.0000000000000366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To compare and critically evaluate a variety of techniques to measure the quantity and biological activity of protein sorption to contact lenses over short time periods. METHODS A literature review was undertaken investigating the major techniques to measure protein sorption to soft contact lens materials, with specific reference to measuring protein directly on lenses using in situ, ex situ, protein structural, and biological activity techniques. RESULTS The use of in situ techniques to measure protein quantity provides excellent sensitivity, but many are not directly applicable to contact lenses. Many ex situ techniques struggle to measure all sorbed proteins, and these measurements can have significant signal interference from the lens materials themselves. Techniques measuring the secondary and tertiary structures of sorbed proteins have exhibited only limited success. CONCLUSIONS There are a wide variety of techniques to measure both the amount of protein and the biological activity of protein sorbed to soft contact lens materials. To measure the mass of protein sorbed to soft contact lenses (not just thin films) over short time periods, the method of choice should be I radiolabeling. This technique is sensitive enough to measure small amounts of deposited protein, provided steps are taken to limit and measure any interaction of the iodine tracer with the materials. To measure the protein activity over short time periods, the method of choice should be to measure the biological function of sorbed proteins. This may require new methods or adaptations of existing ones.
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Rösch C, Kratz F, Hering T, Trautmann S, Umanskaya N, Tippkötter N, Müller-Renno C, Ulber R, Hannig M, Ziegler C. Albumin-lysozyme interactions: Cooperative adsorption on titanium and enzymatic activity. Colloids Surf B Biointerfaces 2016; 149:115-121. [PMID: 27744208 DOI: 10.1016/j.colsurfb.2016.09.048] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 09/02/2016] [Accepted: 09/29/2016] [Indexed: 12/20/2022]
Abstract
The interplay of albumin (BSA) and lysozyme (LYZ) adsorbed simultaneously on titanium was analyzed by gel electrophoresis and BCA assay. It was found that BSA and lysozyme adsorb cooperatively. Additionally, the isoelectric point of the respective protein influences the adsorption. Also, the enzymatic activity of lysozyme and amylase (AMY) in mixtures with BSA was considered with respect to a possible influence of protein-protein interaction on enzyme activity. Indeed, an increase of lysozyme activity in the presence of BSA could be observed. In contrast, BSA does not influence the activity of amylase.
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Affiliation(s)
- Christina Rösch
- Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, D-67663, Kaiserslautern, Germany
| | - Fabian Kratz
- Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, D-67663, Kaiserslautern, Germany
| | - Thomas Hering
- Institute of Bioprocess Engineering, University of Kaiserslautern, D-67663, Kaiserslautern, Germany
| | - Simone Trautmann
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, University of the Saarland, D-66421, Homburg, Germany
| | - Natalia Umanskaya
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, University of the Saarland, D-66421, Homburg, Germany
| | - Nils Tippkötter
- Institute of Bioprocess Engineering, University of Kaiserslautern, D-67663, Kaiserslautern, Germany
| | - Christine Müller-Renno
- Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, D-67663, Kaiserslautern, Germany
| | - Roland Ulber
- Institute of Bioprocess Engineering, University of Kaiserslautern, D-67663, Kaiserslautern, Germany
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, University of the Saarland, D-66421, Homburg, Germany
| | - Christiane Ziegler
- Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, D-67663, Kaiserslautern, Germany.
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Affiliation(s)
- Alinaghi Salari
- Department of Chemical Engineering; University of Toronto; 200 College Street Toronto Ontario M5S 3E5 Canada
| | - Eugenia Kumacheva
- Department of Chemical Engineering; University of Toronto; 200 College Street Toronto Ontario M5S 3E5 Canada
- Department of Chemistry; University of Toronto; 80 Saint George Street Toronto Ontario M5S 3H6 Canada
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; 164 College Street Toronto Ontario M5S 3G9 Canada
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Wang X, Herting G, Wallinder IO, Blomberg E. Adsorption of bovine serum albumin on silver surfaces enhances the release of silver at pH neutral conditions. Phys Chem Chem Phys 2016; 17:18524-34. [PMID: 26111372 DOI: 10.1039/c5cp02306h] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Metallic biomaterials are widely used to replace and/or restore the function of damaged bodily parts. The use of silver as antibacterial coatings onto implants has recently gained large interest in medical applications. The extent of silver that can be released into different biological fluids from such coatings is, except for the surface characteristics of the coating, governed by parameters such as protein characteristics, adsorbed layer properties, formation of silver-protein complexes as well as concentrations of proteins in the solution. This study aims to relate the structure of adsorbed net negatively charged bovine serum albumin (BSA), which is the most abundant protein in serum, to the release of silver from metallic silver surfaces in order to elucidate if the net charge of the protein has any effect of the silver release. Simultaneous adsorption measurements were performed in real time on the very same surface using combined ellipsometry and quartz crystal microbalance with dissipation monitoring (QCM-D) measurements to provide a more comprehensive understanding on adsorption kinetics and layer structures. The amount of released silver into solution was measured by means of graphite furnace atomic absorption spectroscopy (GF-AAS). The structure of the adsorbed BSA layer largely influenced the amount of released silver, an enhancement that increased with BSA concentration. These observations are in complete contrast to the effect of net positively charged lysozyme (LSZ) adsorbed on silver, previously studied by the authors, for which a complete surface coverage suppressed the possibility for silver release. The underlying mechanisms behind the enhanced release of silver in the presence of BSA were mainly attributed to surface complexation between BSA and silver followed by an enhanced exchange rate of these surface complexes with BSA molecules in the solution, which in turn increase the amount of released silver in solution.
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Affiliation(s)
- X Wang
- KTH Royal Institute of Technology, School of Chemical Science and Engineering, Department of Chemistry, Surface and Corrosion Science, Drottning Kristinas väg 51, SE-100 44 Stockholm, Sweden.
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11
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Affinity interactions of human immunoglobulin G with short peptides: role of ligand spacer on binding, kinetics, and mass transfer. Anal Bioanal Chem 2015; 408:1829-41. [DOI: 10.1007/s00216-015-9135-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Revised: 10/05/2015] [Accepted: 10/20/2015] [Indexed: 11/30/2022]
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12
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Parkes M, Myant C, Cann PM, Wong JS. Synovial Fluid Lubrication: The Effect of Protein Interactions on Adsorbed and Lubricating Films. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.biotri.2015.05.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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A review on the wettability of dental implant surfaces I: theoretical and experimental aspects. Acta Biomater 2014; 10:2894-906. [PMID: 24590162 DOI: 10.1016/j.actbio.2014.02.040] [Citation(s) in RCA: 213] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 02/14/2014] [Accepted: 02/21/2014] [Indexed: 01/31/2023]
Abstract
The surface wettability of biomaterials determines the biological cascade of events at the biomaterial/host interface. Wettability is modulated by surface characteristics, such as surface chemistry and surface topography. However, the design of current implant surfaces focuses mainly on specific micro- and nanotopographical features, and is still far from predicting the concomitant wetting behavior. There is an increasing interest in understanding the wetting mechanisms of implant surfaces and the role of wettability in the biological response at the implant/bone or implant/soft tissue interface. Fundamental knowledge related to the influence of surface roughness (i.e. a quantification of surface topography) on titanium and titanium alloy surface wettability, and the different associated wetting regimes, can improve our understanding of the role of wettability of rough implant surfaces on the biological outcome. Such an approach has been applied to biomaterial surfaces only in a limited way. Focusing on titanium dental and orthopaedic implants, the present study reviews the current knowledge on the wettability of biomaterial surfaces, encompassing basic and applied aspects that include measurement techniques, thermodynamic aspects of wetting and models predicting topographical and roughness effects on the wetting behavior.
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Thourson SB, Marsh CA, Doyle BJ, Timpe SJ. Quartz crystal microbalance study of bovine serum albumin adsorption onto self-assembled monolayer-functionalized gold with subsequent ligand binding. Colloids Surf B Biointerfaces 2013; 111:707-12. [DOI: 10.1016/j.colsurfb.2013.06.053] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 06/27/2013] [Accepted: 06/30/2013] [Indexed: 11/30/2022]
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Quartz crystal microbalance with dissipation (QCM-D) as tool to exploit antigen–antibody interactions in pancreatic ductal adenocarcinomadetection. Biosens Bioelectron 2013; 42:646-52. [DOI: 10.1016/j.bios.2012.10.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 09/22/2012] [Accepted: 10/03/2012] [Indexed: 01/14/2023]
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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: 224] [Impact Index Per Article: 18.7] [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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Mukherjee D, Vaughn M, Khomami B, Bruce BD. Modulation of cyanobacterial photosystem I deposition properties on alkanethiolate Au substrate by various experimental conditions. Colloids Surf B Biointerfaces 2011; 88:181-90. [DOI: 10.1016/j.colsurfb.2011.06.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 06/22/2011] [Accepted: 06/22/2011] [Indexed: 10/18/2022]
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Lorite GS, Rodrigues CM, de Souza AA, Kranz C, Mizaikoff B, Cotta MA. The role of conditioning film formation and surface chemical changes on Xylella fastidiosa adhesion and biofilm evolution. J Colloid Interface Sci 2011; 359:289-95. [PMID: 21486669 DOI: 10.1016/j.jcis.2011.03.066] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Revised: 03/17/2011] [Accepted: 03/18/2011] [Indexed: 10/18/2022]
Abstract
Biofilms are complex microbial communities with important biological functions including enhanced resistance against external factors like antimicrobial agents. The formation of a biofilm is known to be strongly dependent on substrate properties including hydrophobicity/hydrophilicity, structure, and roughness. The adsorption of (macro)molecules on the substrate, also known as conditioning film, changes the physicochemical properties of the surface and affects the bacterial adhesion. In this study, we investigate the physicochemical changes caused by Periwinkle wilt (PW) culture medium conditioning film formation on different surfaces (glass and silicon) and their effect on X. fastidiosa biofilm formation. Contact angle measurements have shown that the film formation decreases the surface hydrophilicity degree of both glass and silicon after few hours. Atomic force microscopy (AFM) images show the glass surface roughness is drastically reduced with conditioning film formation. First-layer X. fastidiosa biofilm on glass was observed in the AFM liquid cell after a period of time similar to that determined for the hydrophilicity changes. In addition, attenuation total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy supports the AFM observation, since the PW absorption spectra increases with time showing a stronger contribution from the phosphate groups. Although hydrophobic and rough surfaces are commonly considered to increase bacteria cell attachment, our results suggest that these properties are not as important as the surface functional groups resulting from PW conditioning film formation for X. fastidiosa adhesion and biofilm development.
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Affiliation(s)
- Gabriela S Lorite
- Departamento de Física Aplicada, Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, SP, Brazil.
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Müller C, Wald J, Hoth-Hannig W, Umanskaya N, Scholz D, Hannig M, Ziegler C. Protein adhesion on dental surfaces-a combined surface analytical approach. Anal Bioanal Chem 2011; 400:679-89. [PMID: 21246192 DOI: 10.1007/s00216-010-4613-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Revised: 12/10/2010] [Accepted: 12/15/2010] [Indexed: 11/25/2022]
Abstract
Protein adsorption is a field of huge interest in a number of application fields. Information on protein adhesion is accessible by a variety of methods. However, the results obtained are significantly influenced by the applied technique. The objective of this work was to understand the role of adhesion forces (obtained by scanning force spectroscopy, SFS) in the process of protein adsorption and desorption. In SFS, the protein is forced to and retracted from the surface, even under unfavorable conditions, in contrast to the natural situation. Furthermore, adhesion forces are correlated with adhesion energies, neglecting the entropic part in the Gibbs enthalpy. In this context, dynamic contact angle (DCA) measurements were performed to identify the potential of this method to complement SFS data. In DCA measurements, the protein diffuses voluntarily to the surface and information on surface coverage and reversibility of adsorption is obtained, including entropic effects (conformational changes and hydrophobic effect). It could be shown that the surface coverage (by DCA) of bovine serum albumin on dental materials correlates well with the adhesion forces (by SFS) if no hydrophobic surface is involved. On those, the entropic hydrophobic effect plays a major role. As a second task, the reversibility of the protein adsorption, i.e., the voluntary desorption as studied by DCA, was compared to the adhesion forces. Here, a correlation between low adhesion forces and good reversibility could be found as long as no covalent bonds were involved. The comparative study of DCA and SFS, thus, leads to a more detailed picture of the complete adsorption/desorption cycle.
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Affiliation(s)
- Christine Müller
- Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Germany
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Sikanen T, Wiedmer SK, Heikkilä L, Franssila S, Kostiainen R, Kotiaho T. Dynamic coating of SU-8 microfluidic chips with phospholipid disks. Electrophoresis 2010; 31:2566-74. [DOI: 10.1002/elps.201000130] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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21
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Protein adsorption behaviors on chitosan/poly(ɛ-caprolactone) blend films studied by quartz crystal microbalance with dissipation monitoring (QCM-D). ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s11431-009-0233-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Zhuang H, Lu P, Lim SP, Lee HP. Study of the evaporation of colloidal suspension droplets with the quartz crystal microbalance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:8373-8378. [PMID: 18616226 DOI: 10.1021/la800661g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In this Article, we report the application of the quartz crystal microbalance (QCM) to study the evaporation of colloidal suspension droplets. Droplets of alumina particle suspensions with varying particle size and solid concentration have been investigated. Characteristic responses of the resonance frequency of the QCM associated with the different evaporation stages have been established. Quantitative analysis of the experimental results has been performed by the proposed QCM models. An interesting finding is that frequency increase after complete drying has been observed in some cases. Interpretation of the frequency increase has been developed in terms of the contact stiffness. The possible physical mechanisms are also discussed and quantified in terms of various interparticle forces.
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Affiliation(s)
- Han Zhuang
- Department of Mechanical Engineering, National University of Singapore, 1 Engineering Drive 2, 117576 Singapore.
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Bernsmann F, Lawrence N, Hannig M, Ziegler C, Gnaser H. Protein films adsorbed on experimental dental materials: ToF-SIMS with multivariate data analysis. Anal Bioanal Chem 2008; 391:545-54. [DOI: 10.1007/s00216-008-2014-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2008] [Revised: 02/14/2008] [Accepted: 02/21/2008] [Indexed: 11/30/2022]
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Zourob M, Elwary S, Turner A. Acoustic Wave (TSM) Biosensors: Weighing Bacteria. PRINCIPLES OF BACTERIAL DETECTION: BIOSENSORS, RECOGNITION RECEPTORS AND MICROSYSTEMS 2008. [PMCID: PMC7121835 DOI: 10.1007/978-0-387-75113-9_12] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This chapter is focused on the development and use of acoustic wave biosensor platforms for the detection of bacteria, specifically those based on the thickness shear mode (TSM) resonator. We demonstrated the mechanical and electrical implications of bacterial positioning at the solid-liquid interface of a TSM biosensor and presented a model of the TSM with bacteria attached operating as coupled oscillators. The experiments and model provide an understanding of the nature of the signals produced by acoustic wave devices when they are used for testing bacteria. The paradox of “negative mass” could be a real threat to the interpretation of experimental results related to the detection of bacteria. The knowledge of the true nature of “negative mass” linked to the strength of bacteria attachment will contribute significantly to our understanding of the results of “weighing bacteria.” The results of this work can be used for bacterial detection and control of processes of bacterial settlement, bacterial colonization, biofilm formation, and bacterial infection in which bacterial attachment plays a role.
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Affiliation(s)
| | - Souna Elwary
- Consultant to Biophage Pharma Inc, Montreal, Canada
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Desroches MJ, Chaudhary N, Omanovic S. PM-IRRAS Investigation of the Interaction of Serum Albumin and Fibrinogen with a Biomedical-Grade Stainless Steel 316LVM Surface. Biomacromolecules 2007; 8:2836-44. [PMID: 17715960 DOI: 10.1021/bm070289d] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS) was applied to investigate the interaction of bovine serum albumin (BSA) and fibrinogen with a biomedical-grade 316LVM stainless steel surface, in terms of the adsorption thermodynamics and adsorption-induced secondary structure changes of the proteins. Highly negative apparent Gibbs energy of adsorption values revealed a spontaneous adsorption of both proteins onto the surface, accompanied by significant changes in their secondary structure. It was determined that, at saturated surface coverages, lateral interactions between the adsorbed BSA molecules induced rather extensive secondary structure changes. Fibrinogen's two coiled coils appeared to undergo negligible secondary structure changes upon adsorption of the protein, while large structural rearrangements of the protein's globular domains occurred upon adsorption. The secondary structure of adsorbed fibrinogen was not influenced by lateral interactions between the adsorbed fibrinogen molecules. PM-IRRAS was deemed to be viable for investigating protein adsorption and for obtaining information on adsorption-induced changes in their secondary structures.
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Affiliation(s)
- Marie J Desroches
- Department of Chemical Engineering, McGill University, Montreal, QC, H3A 2B2, Canada
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Lages C, Méndez E. Contact angle measurements under thermodynamic equilibrium conditions. Anal Bioanal Chem 2007; 388:1689-92. [PMID: 17546444 DOI: 10.1007/s00216-007-1373-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2007] [Revised: 05/09/2007] [Accepted: 05/16/2007] [Indexed: 11/29/2022]
Abstract
The precise control of the ambient humidity during contact angle measurements is needed to obtain stable and valid data. For a such purpose, a simple low-cost device was designed, and several modified surfaces relevant to biosensor design were studied. Static contact angle values for these surfaces are lower than advancing contact angles published for ambient conditions, indicating that thermodynamic equilibrium conditions are needed to avoid drop evaporation during the measurements.
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Affiliation(s)
- Carol Lages
- Laboratorio de Biomateriales, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Iguá 4225 casi Mataojo, 11400, Montevideo, Uruguay
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Yu Y, Jin G. Influence of electrostatic interaction on fibrinogen adsorption on gold studied by imaging ellipsometry combined with electrochemical methods. J Colloid Interface Sci 2006; 283:477-81. [PMID: 15721922 DOI: 10.1016/j.jcis.2004.09.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2004] [Accepted: 09/15/2004] [Indexed: 11/19/2022]
Abstract
Imaging ellipsometry was combined with electrochemical methods for studying electrostatic interactions of protein and solid surfaces. The potential of zero charge for gold-coated silicon wafer/solution interfaces wad determined by AC impedance method. The potential of the gold-coated silicon wafer was controlled at the potential of zero charge, and the adsorption of fibrinogen on the potential-controlled and non-controlled surfaces was measured in real time at the same time by imaging ellipsometry. The effect of electrostatic interaction was studied by comparing the difference between the potential of controlled adsorption and the potential of noncontrolled adsorption. It was shown that the rate of fibrinogen adsorption on the potentiostatic surface was faster than that on the nonpotentiostatic surface. The electrostatic influence on fibrinogen adsorption on the gold-coated silicon wafer was weak, so the hydrophobic interaction should be the major affinity.
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Affiliation(s)
- Yong Yu
- Laboratory of National Microgravity, Institute of Mechanics, Chinese Academy of Science, Beijing 100080, People's Republic of China
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Photocatalyzed degradation on a TiO2-coated quartz crystal microbalance. Adsorption/desorption processes in real time in the degradation of benzoic acid and salicylic acid. CATAL COMMUN 2006. [DOI: 10.1016/j.catcom.2005.08.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Dai H, Choe WS, Thai CK, Sarikaya M, Traxler BA, Baneyx F, Schwartz DT. Nonequilibrium synthesis and assembly of hybrid inorganic-protein nanostructures using an engineered DNA binding protein. J Am Chem Soc 2006; 127:15637-43. [PMID: 16262431 DOI: 10.1021/ja055499h] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We show that a protein with no intrinsic inorganic synthesis activity can be endowed with the ability to control the formation of inorganic nanostructures under thermodynamically unfavorable (nonequilibrium) conditions, reproducing a key feature of biological hard-tissue growth and assembly. The nonequilibrium synthesis of Cu(2)O nanoparticles is accomplished using an engineered derivative of the DNA-binding protein TraI in a room-temperature precursor electrolyte. The functional TraI derivative (TraIi1753::CN225) is engineered to possess a cysteine-constrained 12-residue Cu(2)O binding sequence, designated CN225, that is inserted into a permissive site in TraI. When TraIi1753::CN225 is included in the precursor electrolyte, stable Cu(2)O nanoparticles form, even though the concentrations of [Cu(+)] and [OH(-)] are at 5% of the solubility product (K(sp,Cu2O)). Negative control experiments verify that Cu(2)O formation is controlled by inclusion of the CN225 binding sequence. Transmission electron microscopy and electron diffraction reveal a core-shell structure for the nonequilibrium nanoparticles: a 2 nm Cu(2)O core is surrounded by an adsorbed protein shell. Quantitative protein adsorption studies show that the unexpected stability of Cu(2)O is imparted by the nanomolar surface binding affinity of TraIi1753::CN225 for Cu(2)O (K(d) = 1.2 x 10(-)(8) M), which provides favorable interfacial energetics (-45 kJ/mol) for the core-shell configuration. The protein shell retains the DNA-binding traits of TraI, as evidenced by the spontaneous organization of nanoparticles onto circular double-stranded DNA.
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Affiliation(s)
- Haixia Dai
- Departments of Chemical Engineering, Materials Science and Engineering, and Microbiology, University of Washington, Seattle, WA 98195-1750, USA
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Solid/liquid interfacial tension as a tool to study stability of lysozyme on adsorption to solid surfaces. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2005.10.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Menz B, Knerr R, Göpferich A, Steinem C. Impedance and QCM analysis of the protein resistance of self-assembled PEGylated alkanethiol layers on gold. Biomaterials 2005; 26:4237-43. [PMID: 15683646 DOI: 10.1016/j.biomaterials.2004.10.038] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2004] [Accepted: 10/20/2004] [Indexed: 10/26/2022]
Abstract
In this study, we describe the formation and characterization of self-assembled layers of undecanthiol with poly(ethylene glycol) (PEG) moieties of 350Da (PEG350-undecanthiol) and 2000Da (PEG2000-undecanthiol) on gold surfaces. The functionalized surfaces were investigated by means of electrical impedance spectroscopy, which allows calculating the surface coverage from the obtained capacitance values of the formed layers. For both, PEG350-undecanthiol and PEG2000-undecanthiol layers, a surface coverage well above 90% was obtained. Protein resistance of those layers was investigated using the quartz crystal microbalance (QCM) technique, which enables one to monitor protein adsorption label free and in a time resolved manner. The change in resonance frequency of the quartz plate was monitored upon addition of fetal bovine serum indicating that PEG-functionalized surfaces are partly protein resistant compared to hydroxyundecanthiol- and non-functionalized gold surfaces. From QCM experiments, where only a single protein component was added to the PEG-functionalized gold surface, we conclude that the surfaces are fully resistant against serum albumins, while the main protein components that adsorb are globulins. A kinetic analysis reveals that PEG modified gold surfaces do not only significantly diminish the overall amount of bound protein but also significantly slows down the adsorption process.
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Affiliation(s)
- Barbara Menz
- Department of Chemistry and Pharmacy, Institut für Analytische Chemie, Chemo- und Biosensorik, Universität Regensburg, Universitätsstr. 31, 93040 Regensburg, Germany
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Zhou C, Friedt JM, Angelova A, Choi KH, Laureyn W, Frederix F, Francis LA, Campitelli A, Engelborghs Y, Borghs G. Human immunoglobulin adsorption investigated by means of quartz crystal microbalance dissipation, atomic force microscopy, surface acoustic wave, and surface plasmon resonance techniques. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:5870-8. [PMID: 16459603 DOI: 10.1021/la036251d] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Time-resolved adsorption behavior of a human immunoglobin G (hIgG) protein on a hydrophobized gold surface is investigated using multitechniques: quartz crystal microbalance/dissipation (QCM-D) technique; combined surface plasmon resonance (SPR) and Love mode surface acoustic wave (SAW) technique; combined QCM-D and atomic force microscopy (AFM) technique. The adsorbed hIgG forms interfacial structures varying in organization from a submonolayer to a multilayer. An "end-on" IgG orientation in the monolayer film, associated with the surface coverage results, does not corroborate with the effective protein thickness determined from SPR/SAW measurements. This inconsistence is interpreted by a deformation effect induced by conformation change. This conformation change is confirmed by QCM-D measurement. Combined SPR/SAW measurements suggest that the adsorbed protein barely contains water after extended contact with the hydrophobic surface. This limited interfacial hydration also contributed to a continuous conformation change in the adsorbed protein layer. The viscoelastic variation associated with interfacial conformation changes induces about 1.5 times overestimation of the mass uptake in the QCM-D measurements. The merit of combined multitechnique measurements is demonstrated.
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Affiliation(s)
- Cheng Zhou
- Biosensors group, Interuniversity Microelectronics Center (IMEC), Kapeldreef 75, 3001 Leuven, Belgium.
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