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A review of protein adsorption and bioactivity characteristics of poly ε-caprolactone scaffolds in regenerative medicine. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2021.110892] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Li H, Wang Y, Tang Q, Yin D, Tang C, He E, Zou L, Peng Q. The protein corona and its effects on nanoparticle-based drug delivery systems. Acta Biomater 2021; 129:57-72. [PMID: 34048973 DOI: 10.1016/j.actbio.2021.05.019] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 04/25/2021] [Accepted: 05/18/2021] [Indexed: 02/04/2023]
Abstract
In most cases, once nanoparticles (NPs) enter the blood, their surface is covered by biological molecules, especially proteins, forming a so-called protein corona (PC). As a result, what the cells of the body "see" is not the NPs as formulated by the chemists, but the PC. In this way, the PC can influence the effects of the NPs and even mask the desired effects of the NP components. While this can argue for trying to inhibit protein-nanomaterial interactions, encapsulating NPs in an endogenous PC may increase their clinical usefulness. In this review, we briefly introduce the concept of the PC, its formation and its effects on the behavior of NPs. We also discuss how to reduce the formation of PCs or exploit them to enhance NP functions. Studying the interactions between proteins and NPs will provide insights into their clinical activity in health and disease. STATEMENT OF SIGNIFICANCE: The formation of protein corona (PC) will affect the operation of nanoparticles (NPs) in vivo. Since there are many proteins in the blood, it is impossible to completely overcome the formation of PC. Therefore, the use of PCs to deliver drug is the best choice. De-opsonins adsorbed on NPs can reduce macrophage phagocytosis and cytotoxicity of NPs, and prolong their circulation in blood. Albumin, apolipoprotein and transferrin are typical de-opsonins. In present review, we mainly discuss how to optimize the delivery of nanoparticles through the formation of albumin corona, transferrin corona and apolipoprotein corona in vivo or in vitro.
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Affiliation(s)
- Hanmei Li
- Key Laboratory of Coarse Cereal Processing (Ministry of Agriculture and Rural Affairs), School of Food and Biological Engineering, Chengdu university, Chengdu 610106, China
| | - Yao Wang
- Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu university, Chengdu 610106, China
| | - Qi Tang
- Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu university, Chengdu 610106, China
| | - Dan Yin
- Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu university, Chengdu 610106, China
| | - Chuane Tang
- School of Mechanical Engineering, Chengdu university, Chengdu 610106, China
| | - En He
- Key Laboratory of Coarse Cereal Processing (Ministry of Agriculture and Rural Affairs), School of Food and Biological Engineering, Chengdu university, Chengdu 610106, China
| | - Liang Zou
- Key Laboratory of Coarse Cereal Processing (Ministry of Agriculture and Rural Affairs), School of Food and Biological Engineering, Chengdu university, Chengdu 610106, China.
| | - Qiang Peng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
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Barberi J, Spriano S. Titanium and Protein Adsorption: An Overview of Mechanisms and Effects of Surface Features. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1590. [PMID: 33805137 PMCID: PMC8037091 DOI: 10.3390/ma14071590] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/09/2021] [Accepted: 03/19/2021] [Indexed: 12/14/2022]
Abstract
Titanium and its alloys, specially Ti6Al4V, are among the most employed materials in orthopedic and dental implants. Cells response and osseointegration of implant devices are strongly dependent on the body-biomaterial interface zone. This interface is mainly defined by proteins: They adsorb immediately after implantation from blood and biological fluids, forming a layer on implant surfaces. Therefore, it is of utmost importance to understand which features of biomaterials surfaces influence formation of the protein layer and how to guide it. In this paper, relevant literature of the last 15 years about protein adsorption on titanium-based materials is reviewed. How the surface characteristics affect protein adsorption is investigated, aiming to provide an as comprehensive a picture as possible of adsorption mechanisms and type of chemical bonding with the surface, as well as of the characterization techniques effectively applied to model and real implant surfaces. Surface free energy, charge, microroughness, and hydroxylation degree have been found to be the main surface parameters to affect the amount of adsorbed proteins. On the other hand, the conformation of adsorbed proteins is mainly dictated by the protein structure, surface topography at the nano-scale, and exposed functional groups. Protein adsorption on titanium surfaces still needs further clarification, in particular concerning adsorption from complex protein solutions. In addition, characterization techniques to investigate and compare the different aspects of protein adsorption on different surfaces (in terms of roughness and chemistry) shall be developed.
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Affiliation(s)
- Jacopo Barberi
- Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy;
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4
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Xie X, Huang L, Liu Z, Xie W, Wang X. Synthesis of poly(2-vinyl-4,6-diamino-1,3,5-triazine) nanoparticles by semi-continuous precipitation polymerization, characterization and application to bovine hemoglobin adsorption. REACT FUNCT POLYM 2019. [DOI: 10.1016/j.reactfunctpolym.2019.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Chen K, Wang S, Guo X. Confinement effect on the aqueous behaviors of free poly(acrylic acid) and poly(acrylic acid) grafted on a nanoparticle surface. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04541-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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John T, Gladytz A, Kubeil C, Martin LL, Risselada HJ, Abel B. Impact of nanoparticles on amyloid peptide and protein aggregation: a review with a focus on gold nanoparticles. NANOSCALE 2018; 10:20894-20913. [PMID: 30225490 DOI: 10.1039/c8nr04506b] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Society is increasingly exposed to nanoparticles as they are ubiquitous in nature and introduced as man-made air pollutants and as functional ingredients in cosmetic products as well as in nanomedicine. Nanoparticles differ in size, shape and material properties. In addition to their intended function, the side effects on biochemical processes in organisms remain unclear. Nanoparticles can significantly influence the nucleation and aggregation process of peptides. The development of several neurodegenerative diseases, such as Alzheimer's disease, is related to the aggregation of peptides into amyloid fibrils. However, there is no comprehensive or universal mechanism to predict or explain apparent acceleration or inhibition of these aggregation processes. In this work, selected studies and possible mechanisms for amyloid peptide nucleation and aggregation, in the presence of nanoparticles, are highlighted. These studies are discussed in the context of recent data from our group on the role of gold nanoparticles in amyloid peptide aggregation using experimental methods and large-scale molecular dynamics simulations. A complex interplay of the surface properties of the nanoparticles, the properties of the peptides, as well as the resulting forces between both the nanoparticles and the peptides, appear to determine whether amyloid peptide aggregation is influenced, catalysed or inhibited by the presence of nanoparticles.
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Affiliation(s)
- Torsten John
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany.
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Min H, Freeman E, Zhang W, Ashraf C, Allara D, van Duin ACT, Tadigadapa S. Modified Random Sequential Adsorption Model for Understanding Kinetics of Proteins Adsorption at a Liquid-Solid Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7215-7224. [PMID: 28655276 DOI: 10.1021/acs.langmuir.7b00523] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this Article, we experimentally measure the adsorption kinetics of human serum albumin (HSA) on a hydrophobic hexadecanethiolated gold surface. We use micromachined quartz crystal resonators with fundamental frequency of 83 MHz to accomplish these measurements in real time. In this work, we focus on two key results: (i) asymptotic behavior of the sensor responses upon HSA adsorption and (ii) the jamming limit of adsorbed layer formed by both single-injection and multi-injection experiments with the same value of final concentration. We develop a new interface-depletion modified random sequential adsorption (RSA) model to elucidate the adsorption kinetics and the transport properties of the protein molecules. Analysis of the experimentally measured data shows that the results can be explained on the basis of the exponentially depleting interfacial layer RSA model. To better understand the origin of the formation of the interfacial depletion region where the supply of protein molecules is dramatically reduced, we performed a series of molecular dynamics (MD) simulations using the ReaxFF method. These simulations predict that the resulting adsorption of the protein molecules on the thiolated surface results in a specific orientation at the interface and the diffusion constant of the protein molecules in this layer is significantly reduced. This interplay between the surface adsorption rate and the reduced diffusion coefficient leads to the depletion of the protein molecules in the interfacial layer where the concentration of the protein molecules is much less than the bulk concentration and explains the observed slowdown of the HSA adsorption characteristics on a hydrophobic surface.
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Affiliation(s)
- Hwall Min
- Department of Electrical Engineering, ‡Department of Mechanical and Nuclear Engineering, §Materials Research Institute, ∥Department of Chemistry, and ⊥Department of Biomedical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16801, United States
| | - Eugene Freeman
- Department of Electrical Engineering, ‡Department of Mechanical and Nuclear Engineering, §Materials Research Institute, ∥Department of Chemistry, and ⊥Department of Biomedical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16801, United States
| | - Weiwei Zhang
- Department of Electrical Engineering, ‡Department of Mechanical and Nuclear Engineering, §Materials Research Institute, ∥Department of Chemistry, and ⊥Department of Biomedical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16801, United States
| | - Chowdhury Ashraf
- Department of Electrical Engineering, ‡Department of Mechanical and Nuclear Engineering, §Materials Research Institute, ∥Department of Chemistry, and ⊥Department of Biomedical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16801, United States
| | - David Allara
- Department of Electrical Engineering, ‡Department of Mechanical and Nuclear Engineering, §Materials Research Institute, ∥Department of Chemistry, and ⊥Department of Biomedical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16801, United States
| | - Adri C T van Duin
- Department of Electrical Engineering, ‡Department of Mechanical and Nuclear Engineering, §Materials Research Institute, ∥Department of Chemistry, and ⊥Department of Biomedical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16801, United States
| | - Srinivas Tadigadapa
- Department of Electrical Engineering, ‡Department of Mechanical and Nuclear Engineering, §Materials Research Institute, ∥Department of Chemistry, and ⊥Department of Biomedical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16801, United States
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Devineau S, Zargarian L, Renault JP, Pin S. Structure and Function of Adsorbed Hemoglobin on Silica Nanoparticles: Relationship between the Adsorption Process and the Oxygen Binding Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3241-3252. [PMID: 28263607 DOI: 10.1021/acs.langmuir.6b04281] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The connection between the mechanisms of protein adsorption on nanoparticles and the structural and functional properties of the adsorbed protein often remains unclear. We investigate porcine hemoglobin adsorption on silica nanoparticles, and we analyze the structural and functional modifications of adsorbed hemoglobin by UV-vis spectrophotometry, circular dichroism, and oxygen binding measurement. The structural analysis of adsorbed hemoglobin on silica nanoparticles reveals a significant loss of secondary structure and a preservation of the heme electronic structure. However, adsorbed hemoglobin retains its quaternary structure and exhibits an enhanced oxygen affinity with cooperative binding. Moreover, the structural and functional modifications are fully reversible after complete desorption from silica nanoparticles at pH 8.7. The tunable adsorption and desorption of hemoglobin on SNPs with pH change, and the full control of hemoglobin activity by pH, temperature, and the addition of inorganic phosphate effectors opens the way to an interesting system whereby protein adsorption on nanoparticles can allow for full control over hemoglobin oxygen binding activity. Our results suggest that adsorption of hemoglobin on silica nanoparticles leads to a new structural, functional, and dynamic state with full reversibility in a way that significantly differs from protein denaturation.
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Affiliation(s)
- Stéphanie Devineau
- LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay , CEA Saclay, 91191 Gif-sur-Yvette, France
| | - Loussiné Zargarian
- LBPA, ENS de Cachan, CNRS, Université Paris-Saclay , 94235 Cachan Cedex, France
| | - Jean Philippe Renault
- LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay , CEA Saclay, 91191 Gif-sur-Yvette, France
| | - Serge Pin
- LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay , CEA Saclay, 91191 Gif-sur-Yvette, France
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9
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Klein G, Devineau S, Aude JC, Boulard Y, Pasquier H, Labarre J, Pin S, Renault JP. Interferences of Silica Nanoparticles in Green Fluorescent Protein Folding Processes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:195-202. [PMID: 26649773 DOI: 10.1021/acs.langmuir.5b03890] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We investigated the relationship between unfolded proteins, silica nanoparticles and chaperonin to determine whether unfolded proteins could stick to silica surfaces and how this process could impair heat shock protein activity. The HSP60 catalyzed green fluorescent protein (GFP) folding was used as a model system. The adsorption isotherms and adsorption kinetics of denatured GFP were measured, showing that denaturation increases GFP affinity for silica surfaces. This affinity is maintained even if the surfaces are covered by a protein corona and allows silica NPs to interfere directly with GFP folding by trapping it in its unstructured state. We determined also the adsorption isotherms of HSP60 and its chaperonin activity once adsorbed, showing that SiO2 NP can interfere also indirectly with protein folding through chaperonin trapping and inhibition. This inhibition is specifically efficient when NPs are covered first with a layer of unfolded proteins. These results highlight for the first time the antichaperonin activity of silica NPs and ask new questions about the toxicity of such misfolded proteins/nanoparticles assembly toward cells.
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Affiliation(s)
- Géraldine Klein
- NIMBE, CEA/DSM/IRAMIS et UMR3685 CNRS, CEA-Saclay, Gif sur Yvette, France
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, CEA-Saclay, Gif sur Yvette, France
| | - Stéphanie Devineau
- NIMBE, CEA/DSM/IRAMIS et UMR3685 CNRS, CEA-Saclay, Gif sur Yvette, France
| | - Jean Christophe Aude
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, CEA-Saclay, Gif sur Yvette, France
| | - Yves Boulard
- Service de Bioénergétique, Biologie Structurale et Mécanismes, iBiTec-S, UMR 9198 CEA-CNRS-Université Paris-Sud, CEA-Saclay, Gif sur Yvette, France
| | - Hélène Pasquier
- Laboratoire de Chimie Physique, UMR 8000, CNRS-Université Paris-Sud, Orsay, France
| | - Jean Labarre
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, CEA-Saclay, Gif sur Yvette, France
| | - Serge Pin
- NIMBE, CEA/DSM/IRAMIS et UMR3685 CNRS, CEA-Saclay, Gif sur Yvette, France
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Jia P, He M, Gong Y, Chu X, Yang J, Zhao J. Probing the adjustments of macromolecules during their surface adsorption. ACS APPLIED MATERIALS & INTERFACES 2015; 7:6422-6429. [PMID: 25762185 DOI: 10.1021/acsami.5b01138] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Thiol-terminated polymers poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC-SH), poly(N,N-isopropylacrylamide) (PNIPAM-SH), and poly(tert-butyl acrylate) (PtBA-SH) were synthesized, and the polymers were grafted on the gold surfaces of quartz crystal microbalance with dissipation (QCM-D) and surface plasmon resonance (SPR) sensor chips to form brushes. The grafting process of the polymer brushes as well as protein adsorption onto the brush layers was monitored by in situ QCM-D and SPR techniques. By examining the changes in frequency and dissipation factor as well as the value of ∂D/∂f from QCM-D measurements, different stages of the polymer grafting and protein adsorption are distinguished. The most interesting discovery is the conformation change of BSA protein adsorption from a weakly adsorbed native state to a strongly immobilized denatured state on the polymer brushes. The corresponding change in BSA adsorption from a reversible state to an irreversible state was confirmed by SPR measurements. The adsorption of protein on the polymer brushes' surface relies largely on interaction between the protein and the polymers, and the stronger hydrophilicity of the surfaces is proved to be more effective to suppress the protein adsorption. Analysis of the D-f plot of QCM-D measurements helps to characterize different binding strength of protein and the underlying polymer surface.
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Affiliation(s)
- Pengxiang Jia
- †Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Min He
- †Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Yongkuan Gong
- †Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Xiao Chu
- †Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069, China
- ‡Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jingfa Yang
- ‡Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jiang Zhao
- ‡Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Xu Y, Wang S, Han H, Chen K, Qin L, Xu J, Wang J, Li L, Guo X. Enhancement of enzymatic activity by magnetic spherical polyelectrolyte brushes: a potential recycling strategy for enzymes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11156-11164. [PMID: 25181307 DOI: 10.1021/la502314q] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Interactions between amyloglucosidase and magnetic spherical polyelectrolyte brushes (MSPB) were studied by turbidimetric titration, which reveals reversible and tunable behaviors of pH-dependent enzyme-SPB binding. Quantitative thermodyanmic parameters including binding affinity and stoichiometry between enzyme and SPBs were further measured by isothermal titration calorimetry (ITC). A large amount of enzyme can be loaded in MSPB without loss of MSPB stability. We demonstrated that the enzymatic activity of amyloglucosidase bound in MSPB could be greatly enhanced (catalytic reaction rate, k(bound) = 1.36k(free)) compared to free enzyme acitivity in solution. This is tremendous improvement from other carrier systems that usually lead to a significant decrease of enzymatic activity. Both the high enzyme loading capacity and the enhancement of the catalytic activity probably arise from the Coulombic interactions between the enzyme and MSPB. These findings provide a practical strategy for enhancement of enzyme activity and enzyme recycling by MSPB.
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Affiliation(s)
- Yisheng Xu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, China
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12
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Thewes N, Loskill P, Jung P, Peisker H, Bischoff M, Herrmann M, Jacobs K. Hydrophobic interaction governs unspecific adhesion of staphylococci: a single cell force spectroscopy study. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2014; 5:1501-12. [PMID: 25247133 PMCID: PMC4168904 DOI: 10.3762/bjnano.5.163] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 08/12/2014] [Indexed: 05/25/2023]
Abstract
Unspecific adhesion of bacteria is usually the first step in the formation of biofilms on abiotic surfaces, yet it is unclear up to now which forces are governing this process. Alongside long-ranged van der Waals and electrostatic forces, short-ranged hydrophobic interaction plays an important role. To characterize the forces involved during approach and retraction of an individual bacterium to and from a surface, single cell force spectroscopy is applied: A single cell of the apathogenic species Staphylococcus carnosus isolate TM300 is used as bacterial probe. With the exact same bacterium, hydrophobic and hydrophilic surfaces can be probed and compared. We find that as far as 50 nm from the surface, attractive forces can already be recorded, an indication of the involvement of long-ranged forces. Yet, comparing the surfaces of different surface energy, our results corroborate the model that large, bacterial cell wall proteins are responsible for adhesion, and that their interplay with the short-ranged hydrophobic interaction of the involved surfaces is mainly responsible for adhesion. The ostensibly long range of the attraction is a result of the large size of the cell wall proteins, searching for contact via hydrophobic interaction. The model also explains the strong (weak) adhesion of S. carnosus to hydrophobic (hydrophilic) surfaces.
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Affiliation(s)
- Nicolas Thewes
- Experimental Physics, Campus E2 9, Saarland University, D-66123 Saarbrücken, Germany
| | - Peter Loskill
- Experimental Physics, Campus E2 9, Saarland University, D-66123 Saarbrücken, Germany
- Present address: Dept. of Bioengineering and California Institute for Quantitative Biosciences (QB3), University of California at Berkeley, Berkeley, California 94720, USA
| | - Philipp Jung
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg/Saar, Germany
| | - Henrik Peisker
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg/Saar, Germany
| | - Markus Bischoff
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg/Saar, Germany
| | - Mathias Herrmann
- Institute of Medical Microbiology and Hygiene, Saarland University, D-66421 Homburg/Saar, Germany
| | - Karin Jacobs
- Experimental Physics, Campus E2 9, Saarland University, D-66123 Saarbrücken, Germany
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Kudina O, Zakharchenko A, Trotsenko O, Tokarev A, Ionov L, Stoychev G, Puretskiy N, Pryor SW, Voronov A, Minko S. Highly Efficient Phase Boundary Biocatalysis with Enzymogel Nanoparticles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306831] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Kudina O, Zakharchenko A, Trotsenko O, Tokarev A, Ionov L, Stoychev G, Puretskiy N, Pryor SW, Voronov A, Minko S. Highly Efficient Phase Boundary Biocatalysis with Enzymogel Nanoparticles. Angew Chem Int Ed Engl 2013; 53:483-7. [DOI: 10.1002/anie.201306831] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 10/03/2013] [Indexed: 11/06/2022]
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15
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Wang S, Chen K, Kayitmazer AB, Li L, Guo X. Tunable adsorption of bovine serum albumin by annealed cationic spherical polyelectrolyte brushes. Colloids Surf B Biointerfaces 2013; 107:251-6. [DOI: 10.1016/j.colsurfb.2013.02.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 02/11/2013] [Accepted: 02/15/2013] [Indexed: 11/26/2022]
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16
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Koo J, Erlkamp M, Grobelny S, Steitz R, Czeslik C. Pressure-induced protein adsorption at aqueous-solid interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:8025-8030. [PMID: 23725210 DOI: 10.1021/la401296f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
There seems to be a general relation between the standard Gibbs energy change of unfolding, ΔG°unf, of a protein and its affinity to aqueous-solid interfaces. So-called "hard" proteins (ΔG°unf is large) are found to adsorb less strongly to such interfaces than "soft" proteins (ΔG°unf is small). Here, we provide direct support for this rule by using high pressure to modulate the folding stability of a protein. We have performed high-pressure total internal reflection fluorescence (HP-TIRF) spectroscopy and high-pressure neutron reflectometry (HP-NR) to measure the degree of adsorption and the structure of lysozyme on planar solid surfaces as a function of pressure for the first time. By carrying out these experiments at hydrophilic and hydrophobic surfaces with varying concentrations of glycerol, we have found strong evidence that ΔG°unf has indeed a direct influence. At high pressures, there is a larger degree of lysozyme adsorption, probably because lysozyme becomes a "soft" protein under these conditions. The results of this study demonstrate that high pressure is a very useful tool to explore thermodynamics of protein-interface interactions.
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Affiliation(s)
- Juny Koo
- Fakultät Chemie, TU Dortmund University, D-44221 Dortmund, Germany
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Surface Modification of Poly Ethylene Glycol to Resist Nonspecific Adsorption of Proteins. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2013. [DOI: 10.1016/s1872-2040(13)60638-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Wang S, Chen K, Li L, Guo X. Binding between Proteins and Cationic Spherical Polyelectrolyte Brushes: Effect of pH, Ionic Strength, and Stoichiometry. Biomacromolecules 2013; 14:818-27. [DOI: 10.1021/bm301865g] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Siyi Wang
- State Key
Laboratory of Chemical
Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Kaimin Chen
- State Key
Laboratory of Chemical
Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
- Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, People’s
Republic of China
| | - Li Li
- State Key
Laboratory of Chemical
Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Xuhong Guo
- State Key
Laboratory of Chemical
Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
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Hentschel C, Wagner H, Smiatek J, Heuer A, Fuchs H, Zhang X, Studer A, Chi L. AFM-based force spectroscopy on polystyrene brushes: effect of brush thickness on protein adsorption. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1850-1856. [PMID: 23343216 DOI: 10.1021/la302212h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Herein we present a study on nonspecific binding of proteins at highly dense packed hydrophobic polystyrene brushes. In this context, an atomic force microscopy tip was functionalized with concanavalin A to perform single-molecule force spectroscopy measurements on polystyrene brushes with thicknesses of 10 and 60 nm, respectively. Polystyrene brushes with thickness of 10 nm show an almost two times stronger protein adsorption than brushes with a thickness of 60 nm: 72 pN for the thinner and 38 pN for the thicker layer, which is in qualitative agreement with protein adsorption studies conducted macroscopically by fluorescence microscopy.
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Affiliation(s)
- Carsten Hentschel
- Physikalisches Institut, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
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Smiatek J, Heuer A, Wagner H, Studer A, Hentschel C, Chi L. Coat thickness dependent adsorption of hydrophobic molecules at polymer brushes. J Chem Phys 2013; 138:044904. [DOI: 10.1063/1.4789305] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Koo J, Czeslik C. High pressure sample cell for total internal reflection fluorescence spectroscopy at pressures up to 2500 bar. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:085109. [PMID: 22938334 DOI: 10.1063/1.4746385] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Total internal reflection fluorescence (TIRF) spectroscopy is a surface sensitive technique that is widely used to characterize the structure and dynamics of molecules at planar liquid-solid interfaces. In particular, biomolecular systems, such as protein adsorbates and lipid membranes can easily be studied by TIRF spectroscopy. Applying pressure to molecular systems offers access to all kinds of volume changes occurring during assembly of molecules, phase transitions, and chemical reactions. So far, most of these volume changes have been characterized in bulk solution, only. Here, we describe the design and performance of a high pressure sample cell that allows for TIRF spectroscopy under high pressures up to 2500 bar (2.5 × 10(8) Pa), in order to expand the understanding of volume effects from the bulk phase to liquid-solid interfaces. The new sample cell is based on a cylindrical body made of Nimonic 90 alloy and incorporates a pressure transmitting sample cuvette. This cuvette is composed of a fused silica prism and a flexible rubber gasket. It contains the sample solution and ensures a complete separation of the sample from the liquid pressure medium. The sample solution is in contact with the inner wall of the prism forming the interface under study, where fluorescent molecules are immobilized. In this way, the new high pressure TIRF sample cell is very useful for studying any biomolecular layer that can be deposited at a planar water-silica interface. As examples, high pressure TIRF data of adsorbed lysozyme and two phospholipid membranes are presented.
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Affiliation(s)
- Juny Koo
- Technische Universität Dortmund, Fakultät Chemie, D-44221 Dortmund, Germany
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Gruian C, Vanea E, Simon S, Simon V. FTIR and XPS studies of protein adsorption onto functionalized bioactive glass. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2012; 1824:873-81. [DOI: 10.1016/j.bbapap.2012.04.008] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Revised: 02/07/2012] [Accepted: 04/24/2012] [Indexed: 10/28/2022]
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23
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Hähl H, Evers F, Grandthyll S, Paulus M, Sternemann C, Loskill P, Lessel M, Hüsecken AK, Brenner T, Tolan M, Jacobs K. Subsurface influence on the structure of protein adsorbates as revealed by in situ X-ray reflectivity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:7747-56. [PMID: 22533829 DOI: 10.1021/la300850g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The adsorption process of proteins to surfaces is governed by the mutual interactions among proteins, the solution, and the substrate. Interactions arising from the substrate are usually attributed to the uppermost atomic layer. This actual surface defines the surface chemistry and hence steric and electrostatic interactions. For a comprehensive understanding, however, the interactions arising from the bulk material also have to be considered. Our protein adsorption experiments with globular proteins (α-amylase, bovine serum albumin, and lysozyme) clearly reveal the influence of the subsurface material via van der Waals forces. Here, a set of functionalized silicon wafers enables a distinction between the effects of surface chemistry and the subsurface composition of the substrate. Whereas the surface chemistry controls whether the individual proteins are denatured, the strength of the van der Waals forces affects the final layer density and hence the adsorbed amount of proteins. The results imply that van der Waals forces mainly influence surface processes, which govern the structure formation of the protein adsorbates, such as surface diffusion and spreading.
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Affiliation(s)
- Hendrik Hähl
- Department of Experimental Physics, Saarland University, 66041 Saarbrücken, Germany
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24
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Genzer J, Arifuzzaman S, Bhat RR, Efimenko K, Ren CL, Szleifer I. Time dependence of lysozyme adsorption on end-grafted polymer layers of variable grafting density and length. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:2122-30. [PMID: 22181708 PMCID: PMC3269559 DOI: 10.1021/la2038747] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A combined experimental and theoretical approach establishes the long-lived nature of protein adsorption on surfaces coated with chemically grafted macromolecules. Specifically, we monitor the time dependence of adsorption of lysozyme on surfaces comprising polymer assemblies made of poly(2-hydroxyethyl methacrylate) brushes grafted onto flat silica surfaces such that they produce patterns featuring orthogonal and gradual variation of the chain length (N) and grafting density (σ). We show that in the kinetically controlled regime, the amount of adsorbed protein scales universally with the product σN, while at equilibrium the amount of adsorbed protein is governed solely by σ. Surprisingly, for moderate concentrations of protein in solution, adsorption takes more than 72 h to reach an equilibrium, or steady state. Our experimental findings are corroborated with predictions using molecular theory that provides further insight into the protein adsorption phenomenon. The theory predicts that the universal behavior observed experimentally should be applicable to polymers in poor and theta solvents and to a limited extent also to good solvent conditions. Our combined experimental and theoretical findings reveal that protein adsorption is a long-lived phenomenon, much longer than generally assumed. Our studies confirm the previously predicted important differences in behavior for the kinetic versus thermodynamic control of protein adsorption.
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Affiliation(s)
- Jan Genzer
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, USA
| | - Shafi Arifuzzaman
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, USA
| | - Rajendra R. Bhat
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, USA
| | - Kirill Efimenko
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, USA
| | - Chun-lai Ren
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P.R. China
| | - Igal Szleifer
- Department of Biomedical Engineering and Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois, USA
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Evers F, Steitz R, Tolan M, Czeslik C. Reduced protein adsorption by osmolytes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:6995-7001. [PMID: 21568286 DOI: 10.1021/la2010908] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Osmolytes are substances that affect osmosis and are used by cells to adapt to environmental stress. Here, we report a neutron reflectivity study on the influence of some osmolytes on protein adsorption at solid-liquid interfaces. Bovine ribonuclease A (RNase) and bovine insulin were used as model proteins adsorbing at a hydrophilic silica and at a hydrophobic polystyrene surface. From the neutron reflectivity data, the adsorbed protein layers were characterized in terms of layer thickness, protein packing density, and adsorbed protein mass in the absence and presence of urea, trehalose, sucrose, and glycerol. All data point to the clear effect of these nonionic cosolvents on the degree of protein adsorption. For example, 1 M sucrose leads to a reduction of the adsorbed amount of RNase by 39% on a silica surface and by 71% on a polystyrene surface. Trehalose was found to exhibit activity similar to that of sucrose. The changes in adsorbed protein mass can be attributed to a decreased packing density of the proteins in the adsorbed layers. Moreover, we investigated insulin adsorption at a hydrophobic surface in the absence and presence of glycerol. The degree of insulin adsorption is decreased by even 80% in the presence of 4 M of glycerol. The results of this study demonstrate that nonionic cosolvents can be used to tune and control nonspecific protein adsorption at aqueous-solid interfaces, which might be relevant for biomedical applications.
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Affiliation(s)
- Florian Evers
- Fakultät Chemie, Technische Universität Dortmund, D-44221 Dortmund, Germany
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26
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Human guanylate-binding protein 1 as a model system investigated by several surface techniques. Biointerphases 2011; 5:131-8. [PMID: 21219034 DOI: 10.1116/1.3516461] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In medical technologies concerning the surface immobilization of proteins in a defined orientation, maintaining their activity is a critical aspect. Therefore, in this study, the authors have investigated the activity of an elongated protein attached to a self-assembled monolayer supported streptavidin layer for different relative orientations of the protein with regard to the surface. Several mutants of this protein, human guanylate-binding protein 1 (hGBP1) showing GTPase catalytic activity, have been furnished with either one or two biotin anchors. Various independent methods that are based on different biophysical properties such as surface plasmon resonance, atomic force microscopy, and quartz crystal microbalance have been used to determine the orientation of the hGBP1 variants after anchoring them via a streptavidin-linker to a biotinylated surface. The activity of guanosine-triphosphate hydrolysis of hGBP1 monomers bound on the surface is found to depend on their orientation relative to the substrate, relating to their ability to form dimers with other neighboring anchored mutants; the maximum activity is lower than that observed in solutions, as might be expected from diffusion limitations at the solid/liquid interface on the one hand and prevention from homodimer formation due to immobilization on the other hand.
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27
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Understanding protein adsorption phenomena at solid surfaces. Adv Colloid Interface Sci 2011; 162:87-106. [PMID: 21295764 DOI: 10.1016/j.cis.2010.12.007] [Citation(s) in RCA: 974] [Impact Index Per Article: 74.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Revised: 12/21/2010] [Accepted: 12/28/2010] [Indexed: 11/21/2022]
Abstract
Protein adsorption at solid surfaces plays a key role in many natural processes and has therefore promoted a widespread interest in many research areas. Despite considerable progress in this field there are still widely differing and even contradictive opinions on how to explain the frequently observed phenomena such as structural rearrangements, cooperative adsorption, overshooting adsorption kinetics, or protein aggregation. In this review recent achievements and new perspectives on protein adsorption processes are comprehensively discussed. The main focus is put on commonly postulated mechanistic aspects and their translation into mathematical concepts and model descriptions. Relevant experimental and computational strategies to practically approach the field of protein adsorption mechanisms and their impact on current successes are outlined.
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Jeworrek C, Steitz R, Czeslik C, Winter R. High pressure cell for neutron reflectivity measurements up to 2500 bar. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2011; 82:025106. [PMID: 21361632 DOI: 10.1063/1.3553392] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The design of a high pressure (HP) cell for neutron reflectivity experiments is described. The cell can be used to study solid-liquid interfaces under pressures up to 2500 bar (250 MPa). The sample interface is based on a thick silicon block with an area of about 14 cm(2). This area is in contact with the sample solution which has a volume of only 6 cm(3). The sample solution is separated from the pressure transmitting medium, water, by a thin flexible polymer membrane. In addition, the HP cell can be temperature-controlled by a water bath in the range 5-75°C. By using an aluminum alloy as window material, the assembled HP cell provides a neutron transmission as high as 41%. The maximum angle of incidence that can be used in reflectivity experiments is 7.5°. The large accessible pressure range and the low required volume of the sample solution make this HP cell highly suitable for studying pressure-induced structural changes of interfacial proteins, supported lipid membranes, and, in general, biomolecular systems that are available in small quantities, only. To illustrate the performance of the HP cell, we present neutron reflectivity data of a protein adsorbate under high pressure and a lipid film which undergoes several phase transitions upon pressurization.
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Affiliation(s)
- Christoph Jeworrek
- Physical Chemistry I-Biophysical Chemistry, Technische Universität Dortmund, Dortmund, Germany
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29
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Togashi DM, Ryder AG. Assessing protein–surface interactions with a series of multi-labeled BSA using fluorescence lifetime microscopy and Förster Energy Resonance Transfer. Biophys Chem 2010; 152:55-64. [DOI: 10.1016/j.bpc.2010.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 07/13/2010] [Accepted: 07/28/2010] [Indexed: 11/24/2022]
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30
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Di Risio S, Yan N. Adsorption and inactivation behavior of horseradish peroxidase on various substrates. Colloids Surf B Biointerfaces 2010; 79:397-402. [DOI: 10.1016/j.colsurfb.2010.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2009] [Revised: 04/26/2010] [Accepted: 05/02/2010] [Indexed: 10/19/2022]
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31
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Miao S, Leeman H, De Feyter S, Schoonheydt R. Three-Component Langmuir-Blodgett Films Consisting of Surfactant, Clay Mineral, and Lysozyme: Construction and Characterization. Chemistry 2010; 16:2461-9. [DOI: 10.1002/chem.200900584] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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32
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Microgels as Nanoreactors: Applications in Catalysis. CHEMICAL DESIGN OF RESPONSIVE MICROGELS 2010. [DOI: 10.1007/12_2010_71] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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33
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Evers F, Reichhart C, Steitz R, Tolan M, Czeslik C. Probing adsorption and aggregation of insulin at a poly(acrylic acid) brush. Phys Chem Chem Phys 2010; 12:4375-82. [DOI: 10.1039/b925134k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Di Risio S, Yan N. Adsorption and inactivation behavior of horseradish peroxidase on cellulosic fiber surfaces. J Colloid Interface Sci 2009; 338:410-9. [DOI: 10.1016/j.jcis.2009.07.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 06/27/2009] [Accepted: 07/02/2009] [Indexed: 11/28/2022]
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35
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Hollmann O, Reichhart C, Czeslik C. Kinetics of Protein Adsorption at a Poly(Acrylic Acid) Brush Studied by Surface Plasmon Resonance Spectroscopy. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zpch.2008.222.1.205] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The kinetics of protein adsorption at a planar poly(acrylic acid) (PAA) brush has been studied by surface plasmon resonance spectroscopy. A PAA brush has been prepared by spin-coating a gold sensor chip with a thin poly(styrene) film. Then, the diblock copolymer poly(acrylic acid)-poly(styrene) was transferred onto the film using the Langmuir–Blodgett technique generating a PAA brush with a grafting density of about 0.1 nm-2. Hen egg white lysozyme and bovine serum albumin were used as model proteins, because they carry a positive and negative net charge at the applied pH-value of 7 and interact with the negatively charged PAA brush under electrostatic attraction and repulsion, respectively. It has been found that lysozyme is strongly interacting with a PAA brush. Initial rates of adsorption are constant over time suggesting a diffusion-controlled adsorption mechanism. In contrast, a continuously decreasing adsorption rate has been observed for BSA indicating a retarding influence of already adsorbed protein molecules on the adsorption kinetics right from the beginning. For a typical protein solution concentration of 0.1 mg mL-1, the adsorbed amount of lysozyme enters a plateau region after a few seconds only, whereas in the case of BSA adsorption is slower by a factor of 100. The observed differences in the adsorption kinetics of lysozyme and BSA are discussed in the light of recent proposed models of protein adsorption at a PAA brush.
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36
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Quantifying adsorbed protein on surfaces using confocal fluorescence microscopy. Colloids Surf B Biointerfaces 2009; 72:219-29. [DOI: 10.1016/j.colsurfb.2009.04.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2009] [Revised: 04/03/2009] [Accepted: 04/03/2009] [Indexed: 11/17/2022]
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37
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Evers F, Steitz R, Tolan M, Czeslik C. Analysis of Hofmeister Effects on the Density Profile of Protein Adsorbates: A Neutron Reflectivity Study. J Phys Chem B 2009; 113:8462-5. [DOI: 10.1021/jp904065w] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Florian Evers
- Fakultät Physik and DELTA, Fakultät Chemie, Technische Universität Dortmund, D-44221 Dortmund, Germany, and Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109 Berlin, Germany
| | - Roland Steitz
- Fakultät Physik and DELTA, Fakultät Chemie, Technische Universität Dortmund, D-44221 Dortmund, Germany, and Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109 Berlin, Germany
| | - Metin Tolan
- Fakultät Physik and DELTA, Fakultät Chemie, Technische Universität Dortmund, D-44221 Dortmund, Germany, and Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109 Berlin, Germany
| | - Claus Czeslik
- Fakultät Physik and DELTA, Fakultät Chemie, Technische Universität Dortmund, D-44221 Dortmund, Germany, and Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109 Berlin, Germany
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38
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Lu Y, Wittemann A, Ballauff M. Supramolecular Structures Generated by Spherical Polyelectrolyte Brushes and their Application in Catalysis. Macromol Rapid Commun 2009; 30:806-15. [PMID: 21706663 DOI: 10.1002/marc.200800789] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2008] [Accepted: 01/28/2009] [Indexed: 11/06/2022]
Abstract
We survey recent studies on composite particles made from spherical polyelectrolyte brushes (SPB) and catalytically active nanoparticles or enzymes. SPB consist of a solid core (diameter: ca. 100 nm) onto which long chains of anionic or cationic polyelectrolyte (PE) are densely grafted ("PE brush"). Immersed in water the PE layer affixed to the colloidal core will swell due to the enormous osmotic pressure of the confined counterions ("osmotic brush"). This confinement of the counterions can be used to generate metal nanoparticles on the surface of the SPB. Moreover, enzymes can be immobilized within the PE layer. In both cases, the resulting composite particles are stable against coagulation and can be easily handled and filtered off. The catalytic activity of both systems is largely preserved in case of the enzymes, in case of the metal nanoparticles it is even enhanced. Thus, the SPB present an excellent carrier system for applications in catalysis.
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Affiliation(s)
- Yan Lu
- Physikalische Chemie I, University of Bayreuth, 95440 Bayreuth, Germany
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39
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Wong VN, Fernando G, Wagner AR, Zhang J, Kinsel GR, Zauscher S, Dyer DJ. Separation of peptides with polyionic nanosponges for MALDI-MS analysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:1459-65. [PMID: 19123797 PMCID: PMC2716796 DOI: 10.1021/la802723r] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A polymer brush consisting of 70% poly(N-isopropylacrylamide) (PNIPAAM) and 30% polymethacrylic acid (PMAA) was synthesized from gold substrates with a "grafting from" AIBN-type free-radical initiator. Fractionation of two peptides, bradykinin and buccalin, was accomplished in less than 120 s by placing a 30 pM (pH approximately 6.2) droplet onto the polymer brush substrate. The eluant containing the anionic buccalin is pipetted away for MALDI analysis while the cationic bradykinin adsorbed to the swollen anionic brush and was subsequently released by adding a droplet of formic acid to the substrate. This caused the brush to collapse and release the bradykinin, much like squeezing a sponge; these nanosponge substrates exhibited very high loading capacity (>2.0 mg/mL) compared to plasma-polymer-modified MALDI substrates. Ellipsometric measurements showed that complementary peptides adsorb rapidly while those of the same charge do not, and MALDI-MS analysis of the two fractions showed separation of both peptides. The adsorption of bradykinin was monitored over time, and 85% of the peptide had been adsorbed to the nanosponge in 1 min from a 0.5 mg/mL aqueous solution.
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Affiliation(s)
- Ven Ney Wong
- Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, Illinois 62901-4409, USA
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40
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Evers F, Shokuie K, Paulus M, Sternemann C, Czeslik C, Tolan M. Exploring the interfacial structure of protein adsorbates and the kinetics of protein adsorption: an in situ high-energy X-ray reflectivity study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:10216-10221. [PMID: 18715021 DOI: 10.1021/la801642s] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The high energy X-ray reflectivity technique has been applied to study the interfacial structure of protein adsorbates and protein adsorption kinetics in situ. For this purpose, the adsorption of lysozyme at the hydrophilic silica-water interface has been chosen as a model system. The structure of adsorbed lysozyme layers was probed for various aqueous solution conditions. The effect of solution pH and lysozyme concentration on the interfacial structure was measured. Monolayer formation was observed for all cases except for the highest concentration. The adsorbed protein layers consist of adsorbed lysozyme molecules with side-on or end-on orientation. By means of time-dependent X-ray reflectivity scans, the time-evolution of adsorbed proteins was monitored as well. The results of this study demonstrate the capabilities of in situ X-ray reflectivity experiments on protein adsorbates. The great advantages of this method are the broad wave vector range available and the high time resolution.
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Affiliation(s)
- Florian Evers
- Fakultät Physik/DELTA, Technische Universität Dortmund, Maria-Goeppert-Mayer-Strasse 2, Dortmund, Germany,
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41
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Enzymatic activity of immobilized enzyme determined by isothermal titration calorimetry. Anal Biochem 2008; 378:184-9. [DOI: 10.1016/j.ab.2008.04.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2008] [Revised: 04/03/2008] [Accepted: 04/05/2008] [Indexed: 11/19/2022]
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42
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Henzler K, Rosenfeldt S, Wittemann A, Harnau L, Finet S, Narayanan T, Ballauff M. Directed motion of proteins along tethered polyelectrolytes. PHYSICAL REVIEW LETTERS 2008; 100:158301. [PMID: 18518159 DOI: 10.1103/physrevlett.100.158301] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2007] [Indexed: 05/26/2023]
Abstract
We present the first time-resolved investigation of motions of proteins in densely grafted layers of spherical polyelectrolyte brushes. Using small-angle x-ray scattering combined with rapid stopped-flow mixing, we followed the uptake of bovine serum albumin by poly(acrylic acid) layer with high spatial and temporal resolution. We find that the total amount of adsorbed protein scales with time as t(1/4). This subdiffusive behavior is explained on the basis of directed motion of the protein along the polyelectrolyte chains.
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Affiliation(s)
- Katja Henzler
- Physikalische Chemie I, University of Bayreuth, Bayreuth, Germany
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43
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Hollmann O, Steitz R, Czeslik C. Structure and dynamics of α-lactalbumin adsorbed at a charged brush interface. Phys Chem Chem Phys 2008; 10:1448-56. [DOI: 10.1039/b716264b] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Henzler K, Wittemann A, Breininger E, Ballauff M, Rosenfeldt S. Adsorption of Bovine Hemoglobin onto Spherical Polyelectrolyte Brushes Monitored by Small-Angle X-ray Scattering and Fourier Transform Infrared Spectroscopy. Biomacromolecules 2007; 8:3674-81. [DOI: 10.1021/bm700953e] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Katja Henzler
- Physikalische Chemie I, Universität Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | - Alexander Wittemann
- Physikalische Chemie I, Universität Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | - Eugenia Breininger
- Physikalische Chemie I, Universität Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | - Matthias Ballauff
- Physikalische Chemie I, Universität Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
| | - Sabine Rosenfeldt
- Physikalische Chemie I, Universität Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
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Jacobsen K, Hubbell WL, Ernst OP, Risse T. Details of the Partial Unfolding of T4 Lysozyme on Quartz Using Site-Directed Spin Labeling. Angew Chem Int Ed Engl 2006; 45:3874-7. [PMID: 16671129 DOI: 10.1002/anie.200600008] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kerstin Jacobsen
- Fritz Haber Institute of the Max Planck Society, Department of Chemical Physics, Faradayweg 4-6, 14195 Berlin, Germany.
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Jacobsen K, Hubbell WL, Ernst OP, Risse T. Partielle Entfaltung von T4-Lysozym auf einer Quarzoberfläche: Analyse der Strukturänderungen adsorbierter Proteine durch ESR-Spektroskopie. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200600008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wittemann A, Ballauff M. Interaction of proteins with linear polyelectrolytes and spherical polyelectrolyte brushes in aqueous solution. Phys Chem Chem Phys 2006; 8:5269-75. [DOI: 10.1039/b609879g] [Citation(s) in RCA: 154] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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