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Hicks E, Rogers NMK, Hendren CO, Kuehn MJ, Wiesner MR. Extracellular Vesicles and Bacteriophages: New Directions in Environmental Biocolloid Research. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:16728-16742. [PMID: 37898880 DOI: 10.1021/acs.est.3c05041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
There is a long-standing appreciation among environmental engineers and scientists regarding the importance of biologically derived colloidal particles and their environmental fate. This interest has been recently renewed in considering bacteriophages and extracellular vesicles, which are each poised to offer engineers unique insights into fundamental aspects of environmental microbiology and novel approaches for engineering applications, including advances in wastewater treatment and sustainable agricultural practices. Challenges persist due to our limited understanding of interactions between these nanoscale particles with unique surface properties and their local environments. This review considers these biological particles through the lens of colloid science with attention given to their environmental impact and surface properties. We discuss methods developed for the study of inert (nonbiological) particle-particle interactions and the potential to use these to advance our understanding of the environmental fate and transport of extracellular vesicles and bacteriophages.
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Affiliation(s)
- Ethan Hicks
- Department of Civil & Environmental Engineering, Duke University, Durham, North Carolina 27708, United States
- Center for the Environmental Implications of Nanotechnology, Duke University, Durham, North Carolina 27708, United States
| | - Nicholas M K Rogers
- Department of Mechanical Engineering, Porter School of Earth and Environmental Studies, Tel Aviv University, Tel Aviv 69978, Israel
| | - Christine Ogilvie Hendren
- Center for the Environmental Implications of Nanotechnology, Duke University, Durham, North Carolina 27708, United States
- Research Institute for Environment, Energy and Economics, Appalachian State University, Boone, North Carolina 28608, United States
| | - Meta J Kuehn
- Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710, United States
| | - Mark R Wiesner
- Department of Civil & Environmental Engineering, Duke University, Durham, North Carolina 27708, United States
- Center for the Environmental Implications of Nanotechnology, Duke University, Durham, North Carolina 27708, United States
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2
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Abu Quba AA, Goebel MO, Karagulyan M, Miltner A, Kästner M, Bachmann J, Schaumann GE, Diehl D. Hypertonic stress induced changes of Pseudomonas fluorescens adhesion towards soil minerals studied by AFM. Sci Rep 2023; 13:17146. [PMID: 37816775 PMCID: PMC10564757 DOI: 10.1038/s41598-023-44256-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 10/05/2023] [Indexed: 10/12/2023] Open
Abstract
Studying bacterial adhesion to mineral surfaces is crucial for understanding soil properties. Recent research suggests that minimal coverage of sand particles with cell fragments significantly reduces soil wettability. Using atomic force microscopy (AFM), we investigated the influence of hypertonic stress on Pseudomonas fluorescens adhesion to four different minerals in water. These findings were compared with theoretical XDLVO predictions. To make adhesion force measurements comparable for irregularly shaped particles, we normalized adhesion forces by the respective cell-mineral contact area. Our study revealed an inverse relationship between wettability and the surface-organic carbon content of the minerals. This relationship was evident in the increased adhesion of cells to minerals with decreasing wettability. This phenomenon was attributed to hydrophobic interactions, which appeared to be predominant in all cell-mineral interaction scenarios alongside with hydrogen bonding. Moreover, while montmorillonite and goethite exhibited stronger adhesion to stressed cells, presumably due to enhanced hydrophobic interactions, kaolinite showed an unexpected trend of weaker adhesion to stressed cells. Surprisingly, the adhesion of quartz remained independent of cell stress level. Discrepancies between measured cell-mineral interactions and those calculated by XDLVO, assuming an idealized sphere-plane geometry, helped us interpret the chemical heterogeneity arising from differently exposed edges and planes of minerals. Our results suggest that bacteria may have a significant impact on soil wettability under changing moisture condition.
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Affiliation(s)
- Abd Alaziz Abu Quba
- Institute for Environmental Sciences, University of Kaiserslautern-Landau (RPTU), Landau, Germany
| | - Marc-Oliver Goebel
- Institute of Soil Science, Leibniz Universität Hannover, Hannover, Germany
| | - Mariam Karagulyan
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Anja Miltner
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Matthias Kästner
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Jörg Bachmann
- Institute of Soil Science, Leibniz Universität Hannover, Hannover, Germany
| | - Gabriele E Schaumann
- Institute for Environmental Sciences, University of Kaiserslautern-Landau (RPTU), Landau, Germany
| | - Doerte Diehl
- Institute for Environmental Sciences, University of Kaiserslautern-Landau (RPTU), Landau, Germany.
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3
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Random sequential adsorption: An efficient tool for investigating the deposition of macromolecules and colloidal particles. Adv Colloid Interface Sci 2022; 306:102692. [DOI: 10.1016/j.cis.2022.102692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 04/26/2022] [Accepted: 05/03/2022] [Indexed: 11/18/2022]
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4
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Kessler A, Hedberg J, McCarrick S, Karlsson HL, Blomberg E, Odnevall I. Adsorption of Horseradish Peroxidase on Metallic Nanoparticles: Effects on Reactive Oxygen Species Detection Using 2',7'-Dichlorofluorescin Diacetate. Chem Res Toxicol 2021; 34:1481-1495. [PMID: 33856197 PMCID: PMC8220500 DOI: 10.1021/acs.chemrestox.0c00430] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Indexed: 11/28/2022]
Abstract
The fluorescent probe 2',7'-dichlorofluorescein diacetate (DCFH-DA) together with the enzyme horseradish peroxidase (HRP) is widely used in nanotoxicology to study acellular reactive oxygen species (ROS) production from nanoparticles (NPs). This study examined whether HRP adsorbs onto NPs of Mn, Ni, and Cu and if this surface process influences the extent of metal release and hence the ROS production measurements using the DCFH assay in phosphate buffered saline (PBS), saline, or Dulbecco's modified Eagle's medium (DMEM). Adsorption of HRP was evident onto all NPs and conditions, except for Mn NPs in PBS. The presence of HRP resulted in an increased release of copper from the Cu NPs in PBS and reduced levels of nickel from the Ni NPs in saline. Both metal ions in solution and the adsorption of HRP onto the NPs can change the activity of HRP and thus influence the ROS results. The effect of HRP on the NP reactivity was shown to be solution chemistry dependent. Most notable was the evident affinity/adsorption of phosphate toward the metal NPs, followed by a reduced adsorption of HRP, the concomitant reduction in released manganese from the Mn NPs, and increased levels of released metals from the Cu NPs in PBS. Minor effects were observed for the Ni NPs. The solution pH should be monitored since the release of metals can change the solution pH and the activity of HRP is known to be pH-dependent. It is furthermore essential that solution pH adjustments are made following the addition of NaOH during diacetyl removal of DCFH-DA. Even though not observed for the given exposure conditions of this study, released metal ions could possibly induce agglomeration or partial denaturation of HRP, which in turn could result in steric hindrance for H2O2 to reach the active site of HRP. This study further emphasizes the influence of HRP on the background kinetics, its solution dependence, and effects on measured ROS signals. Different ways of correcting for the background are highlighted, as this can result in different interpretations of generated results. The results show that adsorption of HRP onto the metal NPs influenced the extent of metal release and may, depending on the investigated system, result in either under- or overestimated ROS signals if used together with the DCFH assay. HRP should hence be used with caution when measuring ROS in the presence of reactive metallic NPs.
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Affiliation(s)
- Amanda Kessler
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, 100 44 Stockholm, Sweden
| | - Jonas Hedberg
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, 100 44 Stockholm, Sweden
| | - Sarah McCarrick
- Institute
of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Hanna L. Karlsson
- Institute
of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Eva Blomberg
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, 100 44 Stockholm, Sweden
- RISE
Research Institute of Sweden, Division Bioeconomy
and Health, Material and Surface Design, Box 5604, SE-114 86 Stockholm, Sweden
| | - Inger Odnevall
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, 100 44 Stockholm, Sweden
- AIMES
- Center for the Advancement of Integrated Medical and Engineering
Sciences at Karolinska Institutet and KTH Royal Institute of Technology, 169 27 Stockholm, Sweden
- Department
of Neuroscience, Karolinska Institutet, SE-171 77 Stockholm, Sweden
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5
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Koopal L, Tan W, Avena M. Equilibrium mono- and multicomponent adsorption models: From homogeneous ideal to heterogeneous non-ideal binding. Adv Colloid Interface Sci 2020; 280:102138. [PMID: 32387754 DOI: 10.1016/j.cis.2020.102138] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/30/2020] [Accepted: 03/04/2020] [Indexed: 01/19/2023]
Abstract
Aqueous sorption processes play an important role in, for example, pollutant binding to natural nanoparticles, colloid stability, separation and enrichment of components and remediation processes. In this article, which is a tribute to Hans Lyklema, models of localized (ad)sorption of molecules and ions from aqueous solution on homogeneous and heterogeneous nanoparticles are presented. The discussed models range from ideal monocomponent sorption on homogeneous (Langmuir) and heterogeneous sites, to multicomponent ideal sorption on homogeneous and heterogeneous sites, multicomponent multisite ion complexation with charge distribution (CD-MUSIC) and non-ideal competitive adsorption on heterogeneous sites (NICA). Attention is also paid to lateral interaction, site-induced aggregation, binding stoichiometry and multilayer formation. Electrical double layer models are discussed in relation to ion binding on impermeable and permeable nanoparticles. Insight in models that can describe sorption of molecules and ions on nanoparticles leads to awareness of the limitations of using simple models for complex systems and is needed for the selection and application of an appropriate model for a given system. This is relevant for all practical sorption processes and for a better understanding of the role of natural nanoparticles in the binding of nutrients and pollutants.
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Affiliation(s)
- Luuk Koopal
- Physical Chemistry and Soft Matter, Wageningen University and Research, Wageningen, the Netherlands; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Wenfeng Tan
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Marcelo Avena
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.
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Mei N, Hedberg J, Odnevall Wallinder I, Blomberg E. Influence of Biocorona Formation on the Transformation and Dissolution of Cobalt Nanoparticles under Physiological Conditions. ACS OMEGA 2019; 4:21778-21791. [PMID: 31891055 PMCID: PMC6933593 DOI: 10.1021/acsomega.9b02641] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
Cobalt (Co) nanoparticles (NPs) are produced in different applications and unintentionally generated at several occupational and traffic settings. Their diffuse dispersion may lead to interactions with humans and aquatic organisms via different exposure routes that include their transformation/dissolution in biological media. This paper has investigated the particle stability and reactivity of Co NPs (dispersed by sonication prior to exposure) interacting with selected individual biomolecules (amino acids, polypeptides, and proteins) in phosphate-buffered saline (PBS). No or minor adsorption of amino acids (glutamine, glutamic acid, lysine, and cysteine) was observed on the Co NPs, independent of the functional group and charge. Instead, phosphate adsorption resulted in the formation of a surface layer (a corona) of Co phosphate. The adsorption of larger biomolecules (polyglutamic acid, polylysine, lysozyme, and mucin) was evident in parallel with the formation of Co phosphate. The dissolution of the Co NPs was rapid as 35-55% of the particle mass was dissolved within the first hour of exposure. The larger biomolecules suppressed the dissolution initially compared to exposure in PBS only, whereas the dissolution was essentially unaffected by the presence of amino acids, with cysteine as an exception. The formation of Co phosphate on the NP surface reduced the protective properties of the surface oxide of the Co NPs, as seen from the increased levels of the released Co when compared with the nonphosphate-containing saline. The results underline the diversity of possible outcomes with respect to surface characteristics and dissolution of Co NPs in biological media and emphasize the importance of surface interactions with phosphate on the NP characteristics and reactivity.
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Affiliation(s)
- Nanxuan Mei
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, Stockholm 114 28, Sweden
| | - Jonas Hedberg
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, Stockholm 114 28, Sweden
| | - Inger Odnevall Wallinder
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, Stockholm 114 28, Sweden
| | - Eva Blomberg
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, Stockholm 114 28, Sweden
- Division
Bioscience and Materials, RISE Research
Institutes of Sweden, Stockholm 111 21, Sweden
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7
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The Membrane Interactions of Nano-Silica and Its Potential Application in Animal Nutrition. Animals (Basel) 2019; 9:ani9121041. [PMID: 31795229 PMCID: PMC6940791 DOI: 10.3390/ani9121041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 11/19/2019] [Accepted: 11/23/2019] [Indexed: 12/21/2022] Open
Abstract
Simple Summary Silicon dioxide nanostructures, due to good biocompatibility, low toxicity and high synthetic availability, are promising materials for various biological and industrial applications. Interest in using silicon dioxide nanostructures arises not only from their special interactions with cell membranes, but also from an ease in manipulating their particle size, shape and porosity, allowing one to make a material with the desired physicochemical properties. Despite that, there is still little known about the possible use of silicon dioxide and other nanostructures in animal nutrition. The aim of the present paper was to describe the properties of silica nanostructures, demonstrating potential applications and achievable benefits of using nanostructures as a feed additive. Based on the literature, it seems that diet supplementation with nanoparticles leads to improved performance and immunity in animals, which might be, at least partially, related to changes in the composition of gut microbiota. These unique features make nanoparticles interesting candidates as feed additives used in animal nutrition. Abstract Nanoparticles are increasingly popular in numerous fields including electronics, optics and medicine (vaccines, tissue engineering, microsurgery, genomics and cancer therapies). The most widely used nanoparticles in biomedical applications are those designed by man. Scientists have obtained many types of silica nanoparticles with defined shape and chemical composition, but different properties and applications. Nanoparticles include particles with at least one dimension ranging from 1–100 nm. Silica nanoparticles (Sn), reaching values from several dozen to several hundred m2/g, have unique physicochemical properties due to their porous structure and well-developed specific surface. Currently, the use of Sn in animal nutrition, with a focus on gastrointestinal tract function, is of great interest.
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8
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He J, Wang D, Zhang W, Zhou D. Deposition and release of carboxylated graphene in saturated porous media: Effect of transient solution chemistry. CHEMOSPHERE 2019; 235:643-650. [PMID: 31276877 DOI: 10.1016/j.chemosphere.2019.06.187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/21/2019] [Accepted: 06/24/2019] [Indexed: 06/09/2023]
Abstract
Chemical perturbation of pore-water in porous media may remobilize and release deposited colloids/nanomaterials into bulk flow. This re-entrainment process is important to accurately assessing the fate and transport of colloids/nanomaterials in the subsurface. This study investigated deposition and subsequent release of carboxylated graphene nanomaterials (CG) in water-saturated sand columns by first depositing CG at 100 mM NaCl or 2 mM CaCl2 (Phase 1), followed by Phase 2 (elution with sequences of 50, 10, and 1 mM NaCl, or sequences of 0.5 and 0.1 mM CaCl2), and then Phase 3 elution using deionized water. Approximate 89.2%-98.7% of injected CG was retained in sand through Derjaguin-Landau-Verwey-Overbeek (DLVO) interactions, Ca2+ bridging, and straining in Phase 1. Sequential reduction of ionic strength in Phases 2 and 3 resulted in increased release of deposited CG mainly due to the expansion of the electrical double layer thickness and thus decreased depth of the attractive secondary minimum. With increasing pulses of flushing solution, unrecoverable CG increased because weakly associated CG via the secondary minimum was likely translated to immobile regions. Significant tailing of CG released in Phase 3 suggests that CG retained in CaCl2 was more resistant upon detachment than in NaCl. In cation exchange experiment, only 0.7% of applied CG was released, possibly ascribed to the CG remobilized by cation exchange was immediately re-entrained by the secondary minimum in 50 mM NaCl. Our findings indicate that retained nanomaterials (e.g., CG) can be remobilized and transported downward in transient solution chemistries, raising concerns about their potential migration risk to groundwater.
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Affiliation(s)
- Jianzhou He
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, 48824, United States
| | - Dengjun Wang
- National Research Council Resident Research Associate at the U.S. Environmental Protection Agency, Ada, OK, 74820, United States.
| | - Wei Zhang
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, 48824, United States
| | - Dongmei Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
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Thompson KJ, Kenward PA, Bauer KW, Warchola T, Gauger T, Martinez R, Simister RL, Michiels CC, Llirós M, Reinhard CT, Kappler A, Konhauser KO, Crowe SA. Photoferrotrophy, deposition of banded iron formations, and methane production in Archean oceans. SCIENCE ADVANCES 2019; 5:eaav2869. [PMID: 31807693 PMCID: PMC6881150 DOI: 10.1126/sciadv.aav2869] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 09/18/2019] [Indexed: 06/10/2023]
Abstract
Banded iron formation (BIF) deposition was the likely result of oxidation of ferrous iron in seawater by either oxygenic photosynthesis or iron-dependent anoxygenic photosynthesis-photoferrotrophy. BIF deposition, however, remains enigmatic because the photosynthetic biomass produced during iron oxidation is conspicuously absent from BIFs. We have addressed this enigma through experiments with photosynthetic bacteria and modeling of biogeochemical cycling in the Archean oceans. Our experiments reveal that, in the presence of silica, photoferrotroph cell surfaces repel iron (oxyhydr)oxides. In silica-rich Precambrian seawater, this repulsion would separate biomass from ferric iron and would lead to large-scale deposition of BIFs lean in organic matter. Excess biomass not deposited with BIF would have deposited in coastal sediments, formed organic-rich shales, and fueled microbial methanogenesis. As a result, the deposition of BIFs by photoferrotrophs would have contributed fluxes of methane to the atmosphere and thus helped to stabilize Earth's climate under a dim early Sun.
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Affiliation(s)
- Katharine J. Thompson
- Departments of Microbiology and Immunology and Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Paul A. Kenward
- Departments of Microbiology and Immunology and Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kohen W. Bauer
- Departments of Microbiology and Immunology and Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Tyler Warchola
- Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
| | - Tina Gauger
- Center for Applied Geosciences, University of Tuebingen, 72076 Tuebingen, Germany
| | - Raul Martinez
- Institut für Geo- und Umweltnaturwissenschaften, Albert-Ludwigs-Universität, Mineralogie-Geochemie, 79104 Freiburg, Germany
| | - Rachel L. Simister
- Departments of Microbiology and Immunology and Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Céline C. Michiels
- Departments of Microbiology and Immunology and Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Marc Llirós
- Department of Genetics and Microbiology, BioSciences Faculty, Universitat Autònoma de Barcelona, Catalunya, Spain
| | | | - Andreas Kappler
- Center for Applied Geosciences, University of Tuebingen, 72076 Tuebingen, Germany
| | - Kurt O. Konhauser
- Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
| | - Sean A. Crowe
- Departments of Microbiology and Immunology and Earth, Ocean, and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada
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Weiss ACG, Krüger K, Besford QA, Schlenk M, Kempe K, Förster S, Caruso F. In Situ Characterization of Protein Corona Formation on Silica Microparticles Using Confocal Laser Scanning Microscopy Combined with Microfluidics. ACS APPLIED MATERIALS & INTERFACES 2019; 11:2459-2469. [PMID: 30600987 DOI: 10.1021/acsami.8b14307] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In biological fluids, proteins bind to particles, forming so-called protein coronas. Such adsorbed protein layers significantly influence the biological interactions of particles, both in vitro and in vivo. The adsorbed protein layer is generally described as a two-component system comprising "hard" and "soft" protein coronas. However, a comprehensive picture regarding the protein corona structure is lacking. Herein, we introduce an experimental approach that allows for in situ monitoring of protein adsorption onto silica microparticles. The technique, which mimics flow in vascularized tumors, combines confocal laser scanning microscopy with microfluidics and allows the study of the time-evolution of protein corona formation. Our results show that protein corona formation is kinetically divided into three different phases: phase 1, proteins irreversibly and directly bound (under physiologically relevant conditions) to the particle surface; phase 2, irreversibly bound proteins interacting with preadsorbed proteins, and phase 3, reversibly bound "soft" protein corona proteins. Additionally, we investigate particle-protein interactions on low-fouling zwitterionic-coated particles where the adsorption of irreversibly bound proteins does not occur, and on such particles, only a "soft" protein corona is formed. The reported approach offers the potential to define new state-of-the art procedures for kinetics and protein fouling experiments.
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Affiliation(s)
- Alessia C G Weiss
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering , The University of Melbourne , Parkville , 3010 Victoria , Australia
| | - Kilian Krüger
- Physical Chemistry I , University of Bayreuth , Universitätsstraβe 30 , 95447 Bayreuth , Germany
- JCSN-1/ICS-1 , Forschungszentrum Jülich GmbH , Wilhelm-Johnen-Straβe , 52428 Jülich , Germany
| | - Quinn A Besford
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering , The University of Melbourne , Parkville , 3010 Victoria , Australia
| | - Mathias Schlenk
- Physical Chemistry I , University of Bayreuth , Universitätsstraβe 30 , 95447 Bayreuth , Germany
| | - Kristian Kempe
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Monash Institute of Pharmaceutical Sciences , Monash University , Parkville , 3052 Victoria , Australia
| | - Stephan Förster
- Physical Chemistry I , University of Bayreuth , Universitätsstraβe 30 , 95447 Bayreuth , Germany
- JCSN-1/ICS-1 , Forschungszentrum Jülich GmbH , Wilhelm-Johnen-Straβe , 52428 Jülich , Germany
- Physical Chemistry , RWTH Aachen University , 52074 Aachen , Germany
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering , The University of Melbourne , Parkville , 3010 Victoria , Australia
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11
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Kumar R, Kratzer D, Cheng K, Prisby J, Sugai J, Giannobile WV, Lahann J. Carbohydrate‐Based Polymer Brushes Prevent Viral Adsorption on Electrostatically Heterogeneous Interfaces. Macromol Rapid Commun 2018; 40:e1800530. [DOI: 10.1002/marc.201800530] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 09/04/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Ramya Kumar
- Department of Chemical Engineering University of Michigan MI 48109 USA
- Biointerfaces Institute University of Michigan MI 48109 USA
| | - Domenic Kratzer
- Dr. D. Kratzer Karlsruhe Institute of Technology Baden‐Württemberg 76021 Germany
| | - Kenneth Cheng
- Department of Material Science & Engineering University of Michigan MI 48109 USA
- Biointerfaces Institute University of Michigan MI 48109 USA
| | - Julia Prisby
- Department of Biomedical Engineering University of Michigan MI 48109 USA
- Biointerfaces Institute University of Michigan MI 48109 USA
| | - James Sugai
- School of Dentistry University of Michigan MI 48109 USA
| | | | - Joerg Lahann
- Department of Chemical Engineering University of Michigan MI 48109 USA
- Department of Material Science & Engineering University of Michigan MI 48109 USA
- Department of Biomedical Engineering University of Michigan MI 48109 USA
- Biointerfaces Institute University of Michigan MI 48109 USA
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12
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Jarisz T, Roy S, Hore DK. Surface Water as a Mediator and Reporter of Adhesion at Aqueous Interfaces. Acc Chem Res 2018; 51:2287-2295. [PMID: 30152686 DOI: 10.1021/acs.accounts.8b00258] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Understanding the adsorption of molecules onto surfaces is integral to a wide variety of fields with scientific, engineering, and industrial applications. The surface-adsorbed structure is governed by the nature of the molecule, surface characteristics, and solution environment. There are therefore three critical interactions that govern adhesion: solvent-analyte, substrate-analyte, and substrate-solvent. The last two interactions require a surface-specific probe restricted to a few nanometers or less. This is particularly true of efforts to probe polymer surface structure without being overwhelmed by bulk polymer signal or interfacial water structure in the presence of bulk water. Second-order nonlinear optical techniques are ideal probes of such interactions, as their reporting depth is determined by the polar arrangement of molecules (a break in the macroscopic inversion symmetry) rather than the penetration of the optical fields. This Account begins with an introduction of surface water structure from the perspective of a nonlinear probe. Details about the unique view of the water orientation distribution are discussed and contrasted with information obtained from conventional vibrational techniques. The salient features of water next to model hydrophobic and hydrophilic surfaces are discussed, in preparation for a discussion of solute interactions that follows. We then present three examples using a combination of linear and nonlinear vibrational spectroscopy and molecular dynamics simulations to illustrate how water is both a mediator and a marker of adhesion. The first is a study of amphipathic peptide adhesion onto hydrophobic and hydrophilic surfaces, characterizing the adsorbed structure in relation to the water surrounding the molecule and trapped near the surface. Water is found to be especially important in mediating adhesion to hydrophilic surfaces, where it aids in solvating the peptide as well as facilitating interactions with the surface. In the second example, we look at adhesion of a multicomponent polymer adhesive using surface-bulk heterospectral correlation analysis, in which surface vibrational spectroscopy is combined with bulk infrared absorption to determine interfacial structure development during the evaporation of water. When acrylic acid is added to the polymer, there is a change in orientation of the polymer before an increase in population. This is opposite to what is observed when no additive is present. In our third example, we show how interfacial water provides a unique window into the surface microenvironment during bacterial adhesion, highlighting the role of solution conditions at the surface in cell attachment and biofilm growth. Changes in the nonlinear vibrational response of interfacial water reflect changes occurring in the pH and ionic strength only at the surface, due to the presence of polymeric adhesives secreted by the bacteria. These studies underline the importance of surface water in governing the structure of adhered molecules and in mediating changes in the interfacial environment as a result of adhesion and provide insight into a nanoscale region that is otherwise difficult to query. They also illustrate the importance of combining surface-sensitive and bulk spectroscopic probes with computer modeling to gain a better understanding of the interplay between water and adsorbate structure.
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Affiliation(s)
- Tasha Jarisz
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8W 3V6, Canada
| | - Sandra Roy
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8W 3V6, Canada
| | - Dennis K. Hore
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8W 3V6, Canada
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Ghosh S, Abanteriba S, Wong S, Houshyar S. Selective laser melted titanium alloys for hip implant applications: Surface modification with new method of polymer grafting. J Mech Behav Biomed Mater 2018; 87:312-324. [PMID: 30103113 DOI: 10.1016/j.jmbbm.2018.07.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 07/20/2018] [Accepted: 07/22/2018] [Indexed: 01/05/2023]
Abstract
A significant number of hip replacements (HR) fail permanently despite the success of the medical procedure, due to wear and progressive loss of osseointegration of implants. An ideal model should consist of materials with a high resistance to wear and with good biocompatibility. This study aims to develop a new method of grafting the surface of selective laser melted (SLM) titanium alloy (Ti-6Al-4V) with poly (2-methacryloyloxyethyl phosphorylcholine) (PMPC), to improve the surface properties and biocompatibility of the implant. PMPC was grafted onto the SLM fabricated Ti-6Al-4V, applying the following three techniques; ultraviolet (UV) irradiation, thermal heating both under normal atmosphere and UV irradiation under N2 gas atmosphere. Scanning electron microscopy (SEM), 3D optical profiler, energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR) were used to characterise the grafted surface. Results demonstrated that a continuous PMPC layer on the Ti-6Al-4V surface was achieved using the UV irradiation under N2 gas atmosphere technique, due to the elimination of oxygen from the system. As indicated in the results, one of the advantages of this technique is the presence of phosphorylcholine, mostly on the surface, which reveals the existence of a strong chemical bond between the grafted layer (PMPC) and substrate (Ti-6Al-4V). The nano-scratch test revealed that the PMPC grafted surface improves the mechanical strength of the surface and thus, protects the underlying implant substrate from scratching under high loads.
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Affiliation(s)
- Subir Ghosh
- School of Engineering, RMIT University, Melbourne, 3000 VIC, Australia.
| | | | - Sherman Wong
- School of Science, RMIT University, Melbourne, 3001 VIC, Australia
| | - Shadi Houshyar
- Center for Materials Innovation and Future Fashion (CMIFF), RMIT University, Brunswick, 3056 VIC, Australia
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Adadevoh JST, Ramsburg CA, Ford RM. Chemotaxis Increases the Retention of Bacteria in Porous Media with Residual NAPL Entrapment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:7289-7295. [PMID: 29856626 DOI: 10.1021/acs.est.8b01172] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Chemotaxis has the potential to decrease the persistence of nonaqueous phase liquid (NAPL) contaminants in aquifers by allowing pollutant-degrading bacteria to move toward sources of contamination and thus influence dissolution. This experimental study investigated the migratory response of chemotactic bacteria to a distribution of residual NAPL ganglia entrapped within a laboratory-scale sand column under continuous-flow at a superficial velocity of 0.05 cm/min. Naphthalene dissolved in a model NAPL 2,2,4,4,6,8,8-heptamethylnonane partitioned into the aqueous phase to create localized chemoattractant gradients throughout the column. A pulse mixture of equal concentrations of Pseudomonas putida G7, a strain chemotactic to naphthalene, and Pseudomonas putida G7 Y1, a nonchemotactic mutant, was introduced to the column and effluent bacterial concentrations were measured with time. Breakthrough curves (BTCs) for the two strains were noticeably different upon visual inspection. Differences in BTCs (compared to nonchemotactic controls) were quantified in terms of percent recovery and were statistically significant ( p < 0.01). Chemotaxis reduced percent recovery in the effluent by 45% thereby increasing the population of bacteria that were retained within the column in the vicinity of residual NAPL contaminants. An increase in flow rate to a superficial velocity of 0.25 cm/min did not diminish cell retention associated with the chemotactic effect.
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Affiliation(s)
- Joanna S T Adadevoh
- Department of Chemical Engineering , University of Virginia , Charlottesville , Virginia 22904 , United States
| | - C Andrew Ramsburg
- Department of Civil and Environmental Engineering , Tufts University , Medford , Massachusetts 02155 , United States
| | - Roseanne M Ford
- Department of Chemical Engineering , University of Virginia , Charlottesville , Virginia 22904 , United States
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15
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Jarisz TA, Lane S, Gozdzialski L, Hore DK. Ions, metabolites, and cells: Water as a reporter of surface conditions during bacterial growth. J Chem Phys 2018; 148:222825. [DOI: 10.1063/1.5023748] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Tasha A. Jarisz
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8W 3V6, Canada
| | - Sarah Lane
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8W 3V6, Canada
| | - Lea Gozdzialski
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8W 3V6, Canada
| | - Dennis K. Hore
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8W 3V6, Canada
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Harrison ET, Weidner T, Castner DG, Interlandi G. Predicting the orientation of protein G B1 on hydrophobic surfaces using Monte Carlo simulations. Biointerphases 2016; 12:02D401. [PMID: 27923271 PMCID: PMC5148762 DOI: 10.1116/1.4971381] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 11/06/2016] [Accepted: 11/18/2016] [Indexed: 01/17/2023] Open
Abstract
A Monte Carlo algorithm was developed to predict the most likely orientations of protein G B1, an immunoglobulin G (IgG) antibody-binding domain of protein G, adsorbed onto a hydrophobic surface. At each Monte Carlo step, the protein was rotated and translated as a rigid body. The assumption about rigidity was supported by quartz crystal microbalance with dissipation monitoring experiments, which indicated that protein G B1 adsorbed on a polystyrene surface with its native structure conserved and showed that its IgG antibody-binding activity was retained. The Monte Carlo simulations predicted that protein G B1 is likely adsorbed onto a hydrophobic surface in two different orientations, characterized as two mutually exclusive sets of amino acids contacting the surface. This was consistent with sum frequency generation (SFG) vibrational spectroscopy results. In fact, theoretical SFG spectra calculated from an equal combination of the two predicted orientations exhibited reasonable agreement with measured spectra of protein G B1 on polystyrene surfaces. Also, in explicit solvent molecular dynamics simulations, protein G B1 maintained its predicted orientation in three out of four runs. This work shows that using a Monte Carlo approach can provide an accurate estimate of a protein orientation on a hydrophobic surface, which complements experimental surface analysis techniques and provides an initial system to study the interaction between a protein and a surface in molecular dynamics simulations.
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Affiliation(s)
- Elisa T Harrison
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195
| | - Tobias Weidner
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark and Max Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - David G Castner
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195 and Department of Bioengineering, University of Washington, Seattle, Washington 98195
| | - Gianluca Interlandi
- Department of Bioengineering, University of Washington, Seattle, Washington 98195
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Charreyre MT, Revilla J, Elaissari A, Pichot C, Gallot B. Surface Functionalization of Polystyrene Nanoparticles with Liposaccharide Monomers: Preparation, Characterization and Applications. J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391159901400107] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Latex particles bearing carbohydrate species were prepared by emulsion copolymerization of styrene or methyl methacrylate with polymerizable liposaccharide surfactants; 11-( N-p-vinylbenzyl) amido undecanoyl maltobionamide (LIMA), 6-(2-methylpropenoyloxy)hexyl β-d-cellobioside (CHMA) and 10-(2-methylpropenoyloxy)decyl β-d-cellobiouronoside (CDMA). Due to their amphiphilic structure, these three monomers exhibit surface active properties in dilute solutions and mesomorphic properties in concentrated solutions. Their incorporation onto latex particles was performed according to a batch process or a seed polymerization process. The presence of the carbohydrate residues at the particle surface was directly observed by NMR. The potential application of these functionalized latexes in the biomedical diagnostic field was evaluated by studying the adsorption of bovine serum albumin, and by performing covalent binding of antibodies and single-stranded DNA fragments on their surface.
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Affiliation(s)
- M. T. Charreyre
- Unité Mixte CNRS-bioMérieux, 46, Allée d'Italie, ENSL, 69364 Lyon, France
| | - J. Revilla
- Unité Mixte CNRS-bioMérieux, 46, Allée d'Italie, ENSL, 69364 Lyon, France
| | - A. Elaissari
- Unité Mixte CNRS-bioMérieux, 46, Allée d'Italie, ENSL, 69364 Lyon, France
| | - C. Pichot
- Unité Mixte CNRS-bioMérieux, 46, Allée d'Italie, ENSL, 69364 Lyon, France
| | - B. Gallot
- Laboratoire des Matériaux Organiques à Propriétés Spécifiques, (CNRS) BP 24, 69390 Vernaison, France
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18
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Shen Y, Zhu W, Chen C, Nie Y, Lin X. Biofilm formation in attached microalgal reactors. Bioprocess Biosyst Eng 2016; 39:1281-8. [DOI: 10.1007/s00449-016-1606-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 04/05/2016] [Indexed: 11/29/2022]
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Adadevoh JST, Triolo S, Ramsburg CA, Ford RM. Chemotaxis Increases the Residence Time of Bacteria in Granular Media Containing Distributed Contaminant Sources. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:181-187. [PMID: 26605857 DOI: 10.1021/acs.est.5b03956] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The use of chemotactic bacteria in bioremediation has the potential to increase access to, and the biotransformation of, contaminant mass within the subsurface. This laboratory-scale study aimed to understand and quantify the influence of chemotaxis on the residence times of pollutant-degrading bacteria within homogeneous treatment zones. Focus was placed on a continuous-flow sand-packed column in which a uniform distribution of naphthalene crystals created distributed sources of dissolved-phase contaminant. A 10 mL pulse of Pseudomonas putida G7, which is chemotactic to naphthalene, and Pseudomonas putida G7 Y1, a nonchemotactic mutant strain, were simultaneously introduced into the sand-packed column at equal concentrations. Breakthrough curves obtained from experiments conducted with and without naphthalene were used to quantify the effect of chemotaxis on transport parameters. In the presence of the chemoattractant, longitudinal dispersion of PpG7 increased by a factor of 3, and percent recovery decreased by 43%. In contrast, PpG7 Y1 transport was not influenced by the presence of naphthalene. The results imply that pore-scale chemotaxis responses are evident at an interstitial velocity of 1.8 m/day, which is within the range of typical groundwater flow. Within the context of bioremediation, chemotaxis may work to enhance bacterial residence times in zones of contamination, thereby improving treatment.
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Affiliation(s)
- Joanna S T Adadevoh
- Department of Chemical Engineering, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Sarah Triolo
- Department of Chemical Engineering, University of Virginia , Charlottesville, Virginia 22904, United States
| | - C Andrew Ramsburg
- Department of Civil and Environmental Engineering, Tufts University , Medford, Massachusetts 02155, United States
| | - Roseanne M Ford
- Department of Chemical Engineering, University of Virginia , Charlottesville, Virginia 22904, United States
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20
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Samandoulgou I, Hammami R, Morales Rayas R, Fliss I, Jean J. Stability of Secondary and Tertiary Structures of Virus-Like Particles Representing Noroviruses: Effects of pH, Ionic Strength, and Temperature and Implications for Adhesion to Surfaces. Appl Environ Microbiol 2015; 81:7680-6. [PMID: 26296729 PMCID: PMC4616957 DOI: 10.1128/aem.01278-15] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 08/18/2015] [Indexed: 12/17/2022] Open
Abstract
Loss of ordered molecular structure in proteins is known to increase their adhesion to surfaces. The aim of this work was to study the stability of norovirus secondary and tertiary structures and its implications for viral adhesion to fresh foods and agrifood surfaces. The pH, ionic strength, and temperature conditions studied correspond to those prevalent in the principal vehicles of viral transmission (vomit and feces) and in the food processing and handling environment (pasteurization and refrigeration). The structures of virus-like particles representing GI.1, GII.4, and feline calicivirus (FCV) were studied using circular dichroism and intrinsic UV fluorescence. The particles were remarkably stable under most of the conditions. However, heating to 65°C caused losses of β-strand structure, notably in GI.1 and FCV, while at 75°C the α-helix content of GII.4 and FCV decreased and tertiary structures unfolded in all three cases. Combining temperature with pH or ionic strength caused variable losses of structure depending on the particle type. Regardless of pH, heating to pasteurization temperatures or higher would be required to increase GII.4 and FCV adhesion, while either low or high temperatures would favor GI.1 adhesion. Regardless of temperature, increased ionic strength would increase GII.4 adhesion but would decrease GI.1 adhesion. FCV adsorption would be greater at refrigeration, pasteurization, or high temperature combined with a low salt concentration or at a higher NaCl concentration regardless of temperature. Norovirus adhesion mediated by hydrophobic interaction may depend on hydrophobic residues normally exposed on the capsid surface at pH 3, pH 8, physiological ionic strength, and low temperature, while at pasteurization temperatures it may rely more on buried hydrophobic residues exposed upon structural rearrangement.
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Affiliation(s)
- Idrissa Samandoulgou
- Université Laval, Institute of Nutrition and Functional Foods, Quebec, Quebec, Canada
| | - Riadh Hammami
- Université Laval, Institute of Nutrition and Functional Foods, Quebec, Quebec, Canada
| | - Rocio Morales Rayas
- Université Laval, Institute of Nutrition and Functional Foods, Quebec, Quebec, Canada
| | - Ismail Fliss
- Université Laval, Institute of Nutrition and Functional Foods, Quebec, Quebec, Canada
| | - Julie Jean
- Université Laval, Institute of Nutrition and Functional Foods, Quebec, Quebec, Canada
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Zhang Q, Raoof A, Hassanizadeh SM. Pore-Scale Study of Flow Rate on Colloid Attachment and Remobilization in a Saturated Micromodel. JOURNAL OF ENVIRONMENTAL QUALITY 2015; 44:1376-1383. [PMID: 26436255 DOI: 10.2134/jeq2015.01.0058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Colloid attachment is an important retention mechanism. It is influenced by colloid size, pore size, and flow rate, among other factors. In this work, we studied colloid attachment experimentally under various flow rates, as well as colloid release in response to a rapid change of flow rate. Colloid transport experiments under saturated conditions and with different flow rates were conducted in a physical micromodel. The micromodel was made of polydimethylsiloxane (PDMS), which is a hydrophobic polymer. Colloids were hydrophilic fluorescent carboxylate-modified polystyrene latex microspheres with a mean diameter of 300 nm. We could directly observe the movement of colloids within the pores using a confocal microscope. We also obtained concentration breakthrough curves by measuring the fluorescence intensity at the outlet of the micromodel. In addition, our experiments were simulated using a pore-network modeling, PoreFlow, based on the pore structure of the micromodel. Local colloid concentrations were calculated by solving local mass balance equations for all network elements and then averaging resulting concentrations over the whole micromodel. The measured breakthrough curves were successfully simulated using PoreFlow. Observed and calculated breakthrough curves showed that colloid attachment rate was smaller for larger flow rate. Temporally enhance colloid release (remobilization of attached colloids) was observed when the flow rate was increased by a factor of 10. But no colloid remobilization was observed when the flow rate decreased by a factor of 10.
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22
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Effects of the immobilization of recombinant Escherichia coli on cyclodextrin glucanotransferase (CGTase) excretion and cell viability. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2015.02.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Wang H, Newby BMZ. Applicability of the extended Derjaguin-Landau-Verwey-Overbeek theory on the adsorption of bovine serum albumin on solid surfaces. Biointerphases 2014; 9:041006. [PMID: 25553881 PMCID: PMC4286104 DOI: 10.1116/1.4904074] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 11/22/2014] [Accepted: 11/25/2014] [Indexed: 11/17/2022] Open
Abstract
Protein adsorption is the prerequisite for bacterial attachment and cellular adhesion, which are critical for many biomedical applications. To understand protein adsorption onto substrates, predictive models are generally informative prior to experimental studies. In this study, the extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory was employed to determine whether or not it could interpret the protein adsorption behaviors. The experimental results of fluorescein isothiocyanate labeled bovine serum albumin (BSA) adsorbed on six different surfaces: glass, octadecyltrichlorosilane modified glass, 2-[methoxypoly(ethyleneoxy)propyl]trimethoxy-silane (PEG)-modified glass, polystyrene, poly(dimethylsiloxane), and poly(methyl methacrylate) were utilized. The XDLVO interaction energy curves, especially from the contribution of acid-base interactions, obtained using the surface properties of substrates and BSA molecules qualitatively predict/interpret the protein adsorption behaviors on these surfaces. Some derivation of the experimental results from the prediction was noticed for the glass and the PEG-modified glass. When including a hydration layer to the PEG-modified glass surface, the nonfouling result of such surface by proteins was also elucidated by the XDLVO theory.
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Affiliation(s)
- Hua Wang
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio 44325-3906
| | - Bi-Min Zhang Newby
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio 44325-3906
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24
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Cui Y, Yuan W, Cheng J. Understanding pH and Ionic Strength Effects on Aluminum Sulfate-Induced Microalgae Flocculation. Appl Biochem Biotechnol 2014; 173:1692-702. [DOI: 10.1007/s12010-014-0957-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 05/09/2014] [Indexed: 11/24/2022]
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25
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Perni S, Preedy EC, Prokopovich P. Success and failure of colloidal approaches in adhesion of microorganisms to surfaces. Adv Colloid Interface Sci 2014; 206:265-74. [PMID: 24342736 DOI: 10.1016/j.cis.2013.11.008] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 11/12/2013] [Accepted: 11/13/2013] [Indexed: 12/31/2022]
Abstract
Biofilms are communities of cells attached to surfaces, their contributions to biological process may be either a benefit or a threat depending on the microorganism involved and on the type of substrate and environment. Biofilm formation is a complex series of steps; due to the size of microorganisms, the initial phase of biofilm formation, the bacterial adhesion to the surface, has been studied and modeled using theories developed in colloidal science. In this review the application of approaches such as Derjaguin, Landau, Verwey, Overbeek (DLVO) theory and its extended version (xDLVO), to bacterial adhesion is described along with the suitability and applicability of such approaches to the investigation of the interface phenomena regulating cells adhesion. A further refinement of the xDLVO theory encompassing the brush model is also discussed. Finally, the evidences of phenomena neglected in colloidal approaches, such as surface heterogeneity and fluid flow, likely to be the source of failure are defined.
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26
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Adhesion of B. subtilis spores and vegetative cells onto stainless steel – DLVO theories and AFM spectroscopy. J Colloid Interface Sci 2013; 405:233-41. [DOI: 10.1016/j.jcis.2013.05.031] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 05/13/2013] [Accepted: 05/14/2013] [Indexed: 11/19/2022]
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27
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Water repellency enhances the deposition of negatively charged hydrophilic colloids in a water-saturated sand matrix. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.04.038] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Kanduč M, Schneck E, Netz RR. Hydration interaction between phospholipid membranes: insight into different measurement ensembles from atomistic molecular dynamics simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:9126-9137. [PMID: 23848998 DOI: 10.1021/la401147b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Using the novel thermodynamic extrapolation technique in molecular dynamics simulations, we investigate the interaction between phospholipid bilayers subject to various boundary conditions that correspond to established experimental methods for the determination of pressure-distance curves: the osmotic stress method, the hydrostatic method, and the surface force apparatus method. We discuss the roles of van der Waals and Helfrich undulation pressures in the force balance and find that they do not play a major role in the distance range below 28 water molecules per lipid as considered by us. We address the influence of experimental boundary conditions on bilayer structural changes as well as the consequences on interaction pressures. Significant discrepancies are observed between pressures obtained in osmotic stress and hydration methods on one hand and the surface force apparatus method on the other hand. We quantify the contribution of lipid volume compressibility to the total work of dehydration and find it to be substantial for high pressures. In a wide hydration range, the interaction pressure is mostly determined by the area per lipid molecule. This means that the influence of fatty acid chemistry on experimental pressure-distance curves is indirect and mediated by the area per lipid.
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Affiliation(s)
- Matej Kanduč
- Department of Physics, Free University Berlin, D-14195 Berlin, Germany.
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29
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Saini G, Chan CS. Near-neutral surface charge and hydrophilicity prevent mineral encrustation of Fe-oxidizing micro-organisms. GEOBIOLOGY 2013; 11:191-200. [PMID: 23279435 DOI: 10.1111/gbi.12021] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 11/13/2012] [Indexed: 06/01/2023]
Abstract
Microbial survival in mineralizing environments depends on the ability to evade surface encrustation by minerals, which could obstruct nutrient uptake and waste output. Some organisms localize mineral precipitation away from the cell; however, cell surface properties - charge and hydrophobicity - must also play a role in preventing surface mineralization. This is especially relevant for iron-oxidizing bacteria (FeOB), which face an encrustation threat from both biotic and abiotic mineralization. We used electron microscopy and surface characterization techniques to study the surfaces of two stalk-forming neutrophilic FeOB: the marine Zetaproteobacterium Mariprofundus ferrooxydans PV-1 and the recently isolated freshwater Betaproteobacterium Gallionellales strain R-1. Both organisms lack detectable iron on cell surfaces. Live and azide-inhibited M. ferrooxydans PV-1 cells had small negative zeta potentials (-0.34 to -2.73 mV), over the pH range 4.2-9.4; Gallionellales strain R-1 cells exhibited an even smaller zeta potential (-0.10 to -0.19 mV) over pH 4.2-8.8. Cells have hydrophilic surfaces, according to water contact angle measurements and microbial adhesion to hydrocarbons tests. Thermodynamic and extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) calculations showed that as low charge causes low electrostatic attraction, hydrophilic repulsion dominates cell-mineral interactions. Therefore, we conclude that surface properties help enable these FeOB to survive in highly mineralizing environments. Given both mineral-repelling surface properties and the ability to sequester Fe(III) biominerals in an organomineral stalk, these two FeOB have a well-coordinated system to localize both biotic and abiotic mineral distribution.
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Affiliation(s)
- G Saini
- Department of Geological Sciences, University of Delaware, Newark, DE, USA
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Nandakumar V, Suresh G, Chittaranjan S, Doble M. Synthesis and Characterization of Hydrophilic High Glycolic Acid–Poly(dl-Lactic-co-Glycolic Acid)/ Polycaprolactam/Polyvinyl Alcohol Blends and Their Biomedical Application as a Ureteral Material. Ind Eng Chem Res 2012. [DOI: 10.1021/ie3022253] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Ganesan Suresh
- Department of Biotechnology, Indian Institute of Technology Madras, Chennai, India
| | | | - Mukesh Doble
- Department of Biotechnology, Indian Institute of Technology Madras, Chennai, India
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31
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Lipids in preventive dentistry. Clin Oral Investig 2012; 17:669-85. [DOI: 10.1007/s00784-012-0835-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 08/28/2012] [Indexed: 02/06/2023]
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32
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Lisicki M, Cichocki B, Dhont JKG, Lang PR. One-particle correlation function in evanescent wave dynamic light scattering. J Chem Phys 2012; 136:204704. [PMID: 22667578 DOI: 10.1063/1.4720069] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In order to interpret measured intensity autocorrelation functions obtained in evanescent wave scattering, their initial decay rates have been analyzed recently [P. Holmqvist, J. K. G. Dhont, and P. R. Lang, Phys. Rev. E 74, 021402 (2006); B. Cichocki, E. Wajnryb, J. Blawzdziewicz, J. K. G. Dhont, and P. R. Lang, J. Chem. Phys. 132, 074704 (2010); J. W. Swan and J. F. Brady, ibid. 135, 014701 (2011)]. A theoretical analysis of the longer time dependence of evanescent wave autocorrelation functions, beyond the initial decay, is still lacking. In this paper we present such an analysis for very dilute suspensions of spherical colloids. We present simulation results, a comparison to cumulant expansions, and experiments. An efficient simulation method is developed which takes advantage of the particular mathematical structure of the time-evolution equation of the probability density function of the position coordinate of the colloidal sphere. The computer simulation results are compared with analytic, first and second order cumulant expansions. The only available analytical result for the full time dependence of evanescent wave autocorrelation functions [K. H. Lan, N. Ostrowsky, and D. Sornette, Phys. Rev. Lett. 57, 17 (1986)], that neglects hydrodynamic interactions between the colloidal spheres and the wall, is shown to be quite inaccurate. Experimental results are presented and compared to the simulations and cumulant expansions.
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Affiliation(s)
- Maciej Lisicki
- Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, ul. Hoża 69, 00-681 Warsaw, Poland.
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33
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Sotres J, Pettersson T, Lindh L, Arnebrant T. NanoWear of Salivary Films vs. Substratum Wettability. J Dent Res 2012; 91:973-8. [DOI: 10.1177/0022034512456704] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The pellicle serves as a multifunctional protective layer, providing, e.g., lubrication and remineralization and also acting as a diffusion barrier. In addition, since the formation of the pellicle precedes the adhesion of micro-organisms, it is also important as a conditioning film. We present a novel approach to study the influence of the water wettability of solid surfaces on the strength of adsorbed salivary films. It is based on studying the wear resistance of the films with an atomic force microscope operated in the friction force spectroscopy mode. This methodology provides the strength of the films in terms of the forces needed for breaking and removing them. Our results indicate that these forces are highly dependent on the water wettability of the underlying substrata, decreasing with increasing hydrophobicity. Thus, this study provides valuable information for the design of materials exposed in the oral cavity, i.e., materials that will minimize plaque formation and be easy to clean.
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Affiliation(s)
- J. Sotres
- Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden
| | - T. Pettersson
- Fibre and Polymer Technology, KTH Royal Institute of Technology, 10044 Stockholm, Sweden
| | - L. Lindh
- Prosthetic Dentistry, Faculty of Odontology, Malmö University, 20506 Malmö, Sweden
| | - T. Arnebrant
- Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden
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34
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Vila M, Cicuéndez M, Sánchez-Marcos J, Fal-Miyar V, Manzano M, Prieto C, Vallet-Regi M. Electrical stimuli to increase cell proliferation on carbon nanotubes/mesoporous silica composites for drug delivery. J Biomed Mater Res A 2012; 101:213-21. [PMID: 22847920 DOI: 10.1002/jbm.a.34325] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 07/08/2012] [Accepted: 06/21/2012] [Indexed: 12/21/2022]
Abstract
The development of smart materials as bone implants is nowadays a challenging task to optimize their fast osteointegration. Nevertheless, no attempts have been done in joining the possibility of using electrical stimulation and drug delivery together in a material intended for bone tissue engineering. Moreover, the use of this synergy to induce bone healing is still limited until novel drug reservoirs material formulations allow an efficient applicability of the electrical stimuli. Herein, we present the biological response of osteoblasts cells, cultured over carbon nanotubes-mesoporous silica composites while exposed to external electrical stimulus. Moreover, its ability to function as drug delivery systems is also demonstrated. Bone cell metabolism was stimulated and mitochondrial activity was increased up to seven times in the presence of these composites under electrical stimulus, suggesting their potential application in bone regeneration processes.
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Affiliation(s)
- M Vila
- Department of Inorganic and Bioinorganic Chemistry, Universidad Complutense de Madrid, Madrid 28040, Spain.
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35
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Lundin M, Hedberg Y, Jiang T, Herting G, Wang X, Thormann E, Blomberg E, Wallinder IO. Adsorption and protein-induced metal release from chromium metal and stainless steel. J Colloid Interface Sci 2012; 366:155-164. [DOI: 10.1016/j.jcis.2011.09.068] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2011] [Revised: 09/23/2011] [Accepted: 09/24/2011] [Indexed: 10/17/2022]
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37
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Chatterjee T, Chakraborti S, Joshi P, Singh SP, Gupta V, Chakrabarti P. The effect of zinc oxide nanoparticles on the structure of the periplasmic domain of the Vibrio cholerae ToxR protein. FEBS J 2010; 277:4184-94. [DOI: 10.1111/j.1742-4658.2010.07807.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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38
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Protein adhesion and cell response on atmospheric pressure dielectric barrier discharge-modified polymer surfaces. Acta Biomater 2010; 6:2609-20. [PMID: 20096386 DOI: 10.1016/j.actbio.2010.01.015] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 10/30/2009] [Accepted: 01/11/2010] [Indexed: 11/20/2022]
Abstract
Gaseous plasma discharges are one of the most common means to modify the surface of a polymer without affecting its bulk properties. However, this normally requires the materials to be processed in vacuo to create the active species required to permanently modify the surface chemistry. The ability to invoke such changes under normal ambient conditions in a cost-effective manner has much to offer to enhance the response of medical implants in vivo. It is therefore important to accurately determine the nature and scale of the effects derived from this technology. This paper reports on the modification of poly(styrene) (PS) and poly(methyl methacrylate) (PMMA) using atmospheric pressure plasma processing via exposure to a dielectric barrier discharge (DBD). The changes in surface chemistry and topography after DBD treatment were characterised using water contact angle, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy. A marked increase in the surface oxygen concentration was observed for both PMMA and PS. An increase in surface roughness was observed for PMMA, but not for PS. These changes were found to result in an increase in surface wettability for both polymers. Adsorption of albumin (Alb) onto these substrates was studied using XPS and quartz crystal microbalance with dissipation (QCM-D). The rate of adsorption of Alb onto pristine PMMA and PS was faster than that on the DBD-treated polymers. XPS indicated that a similar concentration of Alb occurred on both of the treated surfaces. Deconvolution of the C1s XPS spectra showed that Alb is adsorbed differently on pristine (hydrophobic) compared to DBD-treated (hydrophilic) surfaces, with more polar functional groups oriented towards the upper surface in the latter case. The QCM-D data corroborates this finding, in that a more viscoelastic layer of Alb was formed on the DBD-treated surfaces relative to that on the pristine surfaces. It was also found that Alb was more easily replaced by larger proteins from foetal bovine serum on the DBD-treated surfaces. The viability of human lens epithelial cells on both of the DBD-treated polymer surface was significantly (P<0.05) greater than on the respective pristine surfaces. In addition, cells that adhered to the treated polymers exhibited a polygonal morphology with well spread actin stress fibres compared with the contracted shape displayed on the pristine surfaces. The results presented here clearly indicate that DBD surface modification has the capability to influence key protein and cell responses.
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Zhuang J, Goeppert N, Tu C, McCarthy J, Perfect E, McKay L. Colloid transport with wetting fronts: interactive effects of solution surface tension and ionic strength. WATER RESEARCH 2010; 44:1270-1278. [PMID: 20056511 DOI: 10.1016/j.watres.2009.12.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2009] [Revised: 11/20/2009] [Accepted: 12/09/2009] [Indexed: 05/28/2023]
Abstract
Transport of colloids with transient wetting fronts represents an important mechanism of contaminant migration in the vadose zone. The work presented here used steady-state saturated and transient unsaturated flow columns to evaluate the transport of a fluorescent latex microsphere (980 nm in diameter) with capillary wetting fronts of different solution surface tensions and ionic strengths. The saturated transport experiments demonstrated that decreasing solution surface tension and ionic strength decreased colloid deposition at the solid-liquid interface and increased colloid recovery in the column effluent. The effect of solution surface tension on colloid transport and deposition was greater at lower ionic strength, suggesting an interaction between these two factors. Under transient unsaturated flow conditions, the number of colloids retained in sand decreased exponentially with travel distance through the porous media. However, lowering the solution surface tension and ionic strength resulted in a more even distribution of colloids along the column. The measured zeta potentials of colloids in different solutions suggest that both lowering surface tension and ionic strength would enhance the electrostatic repulsion between colloid and sand. The experimental results revealed that the effects are nonlinear, implying the possible existence of critical threshold values, beyond which the effects were not significant. In addition, colloid migration slowed down as solution surface tension decreased due to reduction of capillary forces that drove liquid movement.
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Affiliation(s)
- Jie Zhuang
- Institute for a Secure and Sustainable Environment, Department of Biosystems Engineering and Soil Science, The University of Tennessee, Knoxville, TN 37996-4134, USA.
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40
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41
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Radian A, Michaeli D, Serban C, Nechushtai R, Mishael YG. Bioactive apo-ferredoxin–polycation–clay composites for iron binding. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00232a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Norde W. Surface-Tethered Polymers to Influence Protein Adsorption and Microbial Adhesion. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zpch.2007.221.1.47] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
In various applications it is desired that biological cells or protein molecules are immobilized at surfaces. Examples are enzymes or cells in bioreactors and biosensors, immuno-proteins in solid-state diagnostics and proteinaceous farmacons in drug delivery systems. In order to retain biological activity, the structural integrity of the immobilized bio-compounds should be preserved. In other cases immobilization of cells and proteins should be avoided. Adsorption of proteins from biofluids is considered to be the first event in the biofouling process. Subsequently, bacterial and/or other biological cells (e.g., blood platelets, erythrocytes) deposit on the adsorbed protein layer and a biofilm is formed. This causes great problems in areas as diverse as biomedicine, food processing and the marine environment. A generic approach to influence the magnitude of the interaction between a particle (e.g., a cell or a globular protein molecule) and a sorbent material is to manipulate both the long- and short-range interaction forces by grafting soluble polymers or oligomers onto the sorbent surface. Application of oligomers of ethylene oxide (EO) prevents the particles from making intimate contact with the surface. Thus, adsorbed enzymes may retain their native structure and, hence, their enzymatic activity. Another interesting example is the steering effect of pre-adsorbed polymers of EO (PEO) on the orientation of subsequently depositing anisotropic particles. For instance, IgG molecules may be forced in the right orientation and conformation in the interstitial spaces between the PEO chains, therewith doubling the specific antigen binding capacity. By far the greatest part of recent research on modifying surfaces by grafting soluble polymers (usually PEO) aims at the prevention of protein adsorption and/or adhesion of biological cells. Suppression of particle deposition depends primarily on two characteristics of the polymer layer: (a) the grafting density, and (b) the extension of the polymer layer into the solution. The efficacy of grafted PEO layers to reduce protein adsorption and microbial adhesion is illustrated for blood plasma proteins, saliva proteins and a number of bacterial and yeast cells.
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43
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Estrela-Lopis VR, Ul’berg ZR, Kosenko OA. On possible reasons for the selective heteroadagulation of mesenchyme human cells to the surface of acrylic hydrogels. COLLOID JOURNAL 2009. [DOI: 10.1134/s1061933x09010165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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44
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Thin films of xyloglucans for BSA adsorption. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2008.10.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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45
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The oral cavity—a key system to understand substratum-dependent bioadhesion on solid surfaces in man. Clin Oral Investig 2009; 13:123-39. [DOI: 10.1007/s00784-008-0243-3] [Citation(s) in RCA: 158] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2008] [Accepted: 12/08/2008] [Indexed: 10/21/2022]
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46
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Xu L, Han G, Hu J, He Y, Pan J, Li Y, Xiang J. Hydrophobic coating- and surface active solvent-mediated self-assembly of charged gold and silver nanoparticles at water–air and water–oil interfaces. Phys Chem Chem Phys 2009; 11:6490-7. [DOI: 10.1039/b820970g] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Ivanova EP, Mitik-Dineva N, Wang J, Pham DK, Wright JP, Nicolau DV, Mocanasu RC, Crawford RJ. Staleya guttiformis attachment on poly(tert-butylmethacrylate) polymeric surfaces. Micron 2008; 39:1197-204. [DOI: 10.1016/j.micron.2008.04.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Revised: 04/28/2008] [Accepted: 04/28/2008] [Indexed: 10/22/2022]
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48
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Boks NP, Norde W, van der Mei HC, Busscher HJ. Forces involved in bacterial adhesion to hydrophilic and hydrophobic surfaces. MICROBIOLOGY-SGM 2008; 154:3122-3133. [PMID: 18832318 DOI: 10.1099/mic.0.2008/018622-0] [Citation(s) in RCA: 212] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Using a parallel-plate flow chamber, the hydrodynamic shear forces to prevent bacterial adhesion (F(prev)) and to detach adhering bacteria (F(det)) were evaluated for hydrophilic glass, hydrophobic, dimethyldichlorosilane (DDS)-coated glass and six different bacterial strains, in order to test the following three hypotheses. 1. A strong hydrodynamic shear force to prevent adhesion relates to a strong hydrodynamic shear force to detach an adhering organism. 2. A weak hydrodynamic shear force to detach adhering bacteria implies that more bacteria will be stimulated to detach by passing an air-liquid interface (an air bubble) through the flow chamber. 3. DLVO (Derjaguin, Landau, Verwey, Overbeek) interactions determine the characteristic hydrodynamic shear forces to prevent adhesion and to detach adhering micro-organisms as well as the detachment induced by a passing air-liquid interface. F(prev) varied from 0.03 to 0.70 pN, while F(det) varied from 0.31 to over 19.64 pN, suggesting that after initial contact, strengthening of the bond occurs. Generally, it was more difficult to detach bacteria from DDS-coated glass than from hydrophilic glass, which was confirmed by air bubble detachment studies. Calculated attractive forces based on the DLVO theory (F(DLVO)) towards the secondary interaction minimum were higher on glass than on DDS-coated glass. In general, all three hypotheses had to be rejected, showing that it is important to distinguish between forces acting parallel (hydrodynamic shear) and perpendicular (DLVO, air-liquid interface passages) to the substratum surface.
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Affiliation(s)
- Niels P Boks
- Department of Biomedical Engineering, University Medical Center Groningen and University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Willem Norde
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands.,Department of Biomedical Engineering, University Medical Center Groningen and University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Henny C van der Mei
- Department of Biomedical Engineering, University Medical Center Groningen and University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Henk J Busscher
- Department of Biomedical Engineering, University Medical Center Groningen and University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
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49
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Gargiulo G, Bradford S, Simůnek J, Ustohal P, Vereecken H, Klumpp E. Bacteria transport and deposition under unsaturated conditions: the role of the matrix grain size and the bacteria surface protein. JOURNAL OF CONTAMINANT HYDROLOGY 2007; 92:255-73. [PMID: 17337313 DOI: 10.1016/j.jconhyd.2007.01.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2006] [Revised: 10/31/2006] [Accepted: 01/03/2007] [Indexed: 05/14/2023]
Abstract
Unsaturated (80% water saturated) packed column experiments were conducted to investigate the influence of grain size distribution and bacteria surface macromolecules on bacteria (Rhodococcus rhodochrous) transport and deposition mechanisms. Three sizes of silica sands were used in these transport experiments, and their median grain sizes were 607, 567, and 330 microm. The amount of retained bacteria increased with decreasing sand size, and most of the deposited bacteria were found adjacent to the column inlet. The deposition profiles were not consistent with predictions based on classical filtration theory. The experimental data could be accurately characterized using a mathematical model that accounted for first-order attachment, detachment, and time and depth-dependent straining processes. Visual observations of the bacteria deposition as well as mathematical modelling indicated that straining was the dominant mechanism of deposition in these sands (78-99.6% of the deposited bacteria), which may have been enhanced due to the tendency of this bacterium to form aggregates. An additional unsaturated experiment was conducted to better deduce the role of bacteria surface macromolecules on attachment and straining processes. In this case, the bacteria surface was treated using a proteolitic enzyme. This technique was assessed by examining the Fourier-transform infrared spectrum and hydrophobicity of untreated and enzyme treated cells. Both of these analytical procedures demonstrated that this enzymatic treatment removed the surface proteins and/or associated macromolecules. Transport and modelling studies conducted with the enzyme treated bacteria, revealed a decrease in attachment, but that straining was not significantly affected by this treatment.
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Affiliation(s)
- G Gargiulo
- Agrosphere (ICG-IV), Institute of Chemistry and Dynamics of the Geosphere (ICG), Forschungszentrum, Jülich GmbH D-52425, Jülich, Germany.
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50
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Affiliation(s)
- Jacob Klein
- Department of Physical and Theoretical Chemistry, Oxford University, Oxford OX1 3QZ, United Kingdom.
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