1
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Li G, Xu C, Xu H, Gan L, Sun K, Yuan B. Tunable graphene oxide for the low-fouling electrochemical sensing of uric acid in human serum. Analyst 2023; 148:2553-2563. [PMID: 37157878 DOI: 10.1039/d3an00291h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Numerous studies have been reported to improve the selectivity of uric acid (UA) by eliminating the interference from other electroactive species that coexist in biological fluids. However, two main challenges associated with the nonenzymatic electrochemical detection of UA need to be overcome to achieve practical applications in biological samples. Those are the chemical fouling of electrodes caused by the oxidation product of UA and biofouling due to the non-specific absorption of biological macromolecules. It was found that the residual oxo-functional groups and defects on graphene played a crucial part in both electrocatalysis and anti-biofouling. Here, graphene oxide (GO) was tuned by electro-oxidation and electro-reduction and was investigated in antifouling and electrocatalytic performances for the electrochemical sensing of UA by using pristine GO, BSA bound GO, electro-reduction-treated GO and electro-oxidation-treated GO. The electro-oxidation-treated GO was explored in electrochemical sensing for the first time and exhibited the highest sensitivity and low fouling properties. Holey GO might be formed on the electrode surface by the electrochemical oxidation method in a mild and green solution without the use of an acid. The different electrode interfaces as well as the interaction with BSA were investigated by Raman spectroscopy, X-ray photoelectron spectroscopy, contact angle measurements, scanning electron microscopy, electrochemistry, and electrochemical impedance spectroscopy.
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Affiliation(s)
- Gang Li
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
| | - Chunying Xu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
| | - Hui Xu
- Huzhou Key Laboratory of Green Energy Materials and Battery Cascade Utilization, School of Intelligent Manufacturing, Huzhou College, Huzhou, 313000, P.R. China
| | - Liju Gan
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
| | - Kai Sun
- College of Chemistry and Chemical Engineering, Yantai University, Yantai, Shandong 264005, P. R. China
| | - Baiqing Yuan
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
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2
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Glomm WR, Molesworth PP, Yesiltas B, Jacobsen C, Johnsen H. Encapsulation of salmon oil using complex coacervation: Probing the effect of gum acacia on interfacial tension, coacervation and oxidative stability. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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3
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Wei Z, Luciano K, Xia X. Catalytic Gold-Iridium Nanoparticles as Labels for Sensitive Colorimetric Lateral Flow Assay. ACS NANO 2022; 16:21609-21617. [PMID: 36448915 DOI: 10.1021/acsnano.2c10574] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The colorimetric lateral flow assay (CLFA, also known as test strip) is a widely used point-of-care diagnostic technology. It has been a challenge to significantly improve the detection sensitivity of CLFA without involving additional equipment and/or compromising its simplicity. In this work, we break through the detection limit barrier of CLFA by developing a type of catalytic nanoparticles (NPs) used as labels. Specifically, the NPs were engineered by coating conventional gold NPs (AuNPs) with iridium (Ir) to form an Au-Ir core-shell structure. Such Au-Ir NPs possess ultrahigh peroxidase-like catalytic activities. A single Au-Ir NP can generate up to 107 colored molecules per second by catalyzing peroxidase substrates. The strong color signal from the catalysis ensures a high sensitivity of associated CLFA. The Au-Ir NP-based CLFA was successfully applied to the detection of two different cancer biomarkers that achieved limits of detection at the low picogram per milliliter level, hundreds of times lower than those of conventional AuNP-based CLFA.
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Affiliation(s)
- Zhiyuan Wei
- Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
| | - Keven Luciano
- Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
| | - Xiaohu Xia
- Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
- NanoScience Technology Center, University of Central Florida, Orlando, Florida 32816, United States
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4
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In situ investigation of lysozyme adsorption into polyelectrolyte brushes by quartz crystal microbalance with dissipation. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2021.04.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Zhu H, Li X, He Z, Chen Y, Zhu JJ. Metal Azolate Coordination Polymer-Enabled High Payload and Non-Destructive Enzyme Immobilization for Biocatalysis and Biosensing. Anal Chem 2022; 94:6827-6832. [PMID: 35471823 DOI: 10.1021/acs.analchem.2c00637] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The biomineralized metal-organic frameworks (MOFs) as protective layers help enhance the robustness of enzymes for biocatalysis. Despite great efforts, it is still challenging to develop a recyclable system with high payload and tolerance to harsh conditions. Here, we report a facile surface charge-independent strategy based on Zn-based coordination polymer (ZnCP) for nondestructive immobilization of enzyme. The ZnCP outcompetes most of the previously reported MOFs, in terms of high-payload enzyme packaging. Moreover, benefiting from the hydrophilicity of ZnCP, the entrapped enzymes (e.g., positive cytochrome C and negative glucose oxidase) maintained high catalytic activity, resembling their native counterparts. Notably, compared with ZIF-8, such enzyme-incorporated ZnCP (enzyme@ZnCP) is more tolerant to acidic pH, which imparts the enzyme with good recyclability, even in acid species-generated catalytic reactions, thus broadening its application in biocatalysis. The feasibility of enzyme@ZnCP for protein packaging, enzyme cascade catalysis, and biosensing was also validated. Altogether, enzyme@ZnCP demonstrates high enzyme payload, operational stability, and preservation of enzymatic activity, affording a versatile platform to accommodate bioactive enzyme for biocatalysis and biosensing.
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Affiliation(s)
- Hao Zhu
- School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Xiangli Li
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Zhimei He
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.,Smart Health Big Data Analysis and Location Services Engineering Research Center of Jiangsu Province, School of Geographic and Biologic Information, Nanjing University of Posts & Telecommunications, Nanjing 210023, China
| | - Yun Chen
- School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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6
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Li F, Ye L, Zhang L, Li X, Liu X, Zhu J, Li H, Pang H, Yan Y, Xu L, Yang M, Yan J. Design of a genetically programmed barnacle-curli inspired living-cell bioadhesive. Mater Today Bio 2022; 14:100256. [PMID: 35469253 PMCID: PMC9034392 DOI: 10.1016/j.mtbio.2022.100256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 04/03/2022] [Accepted: 04/05/2022] [Indexed: 11/17/2022] Open
Abstract
In nature, barnacles and bacterial biofilms utilize self-assembly amyloid to achieve strong and robust interface adhesion. However, there is still a lack of sufficient research on the construction of macroscopic adhesives based on amyloid-like nanostructures through reasonable molecular design. Here, we report a genetically programmed self-assembly living-cell bioadhesive inspired by barnacle and curli system. Firstly, the encoding genes of two natural adhesion proteins (CsgA and cp19k) derived from E. coli curli and barnacle cement were fused and expressed as a fundamental building block of the bioadhesive. Utilizing the natural curli system of E. coli, fusion protein can be delivered to cell surface and self-assemble into an amyloid nanofibrous network. Then, the E. coli cells were incorporated into the molecular chain network of xanthan gum (XG) through covalent conjugation to produce a living-cell bioadhesive. The shear adhesive strength of the bioadhesive to the surface of the aluminum sheet reaches 278 kPa. Benefiting from living cells encapsulated inside, the bioadhesive can self-regenerate with adequate nutrients. This adhesive has low toxicity to organisms, strong resistance to the liquid environment in vivo, easy to pump, exhibiting potential application prospects in biomedical fields such as intestinal soft tissue repair.
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7
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Cantarutti C, Hunashal Y, La Rosa C, Condorelli M, Giorgetti S, Bellotti V, Fogolari F, Esposito G. The corona of protein-gold nanoparticle systems: the role of ionic strength. Phys Chem Chem Phys 2021; 24:1630-1637. [PMID: 34951613 DOI: 10.1039/d1cp04574a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The nature of the nanoparticle-protein corona is emerging as a key aspect in determining the impact of nanomaterials on proteins and in general on the biological response. We previously demonstrated that citrate-stabilized gold nanoparticles (Cit-AuNPs) interact with β2-microglobulin (β2m) preserving the protein native structure. Moreover, Cit-AuNPs are able to hinder in vitro fibrillogenesis of a β2m pathologic variant, namely D76N, by reducing the oligomeric association of the protein in solution. Here, we clarify the characteristics of the interaction between β2m and Cit-AuNPs by means of different techniques, i.e. surface enhanced Raman spectroscopy, NMR and quartz crystal microbalance with dissipation monitoring. All the results obtained clearly show that by simply changing the ionic strength of the medium it is possible to switch from a labile and transient nature of the protein-NP adduct featuring the so-called soft corona, to a more "hard" interaction with a layer of proteins having a longer residence time on the NP surface. This confirms that the interaction between β2m and Cit-AuNPs is dominated by electrostatic forces which can be tuned by modifying the ionic strength.
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Affiliation(s)
| | - Yamanappa Hunashal
- DAME, Università di Udine, 33100 Udine, Italy.,Science Division, New York University Abu Dhabi, Abu Dhabi, UAE.
| | - Carmelo La Rosa
- Dip. Scienze Chimiche, Università di Catania, 95125 Catania, Italy
| | | | - Sofia Giorgetti
- Dipartimento di Medicina Molecolare, Università di Pavia, 27100 Pavia, Italy
| | - Vittorio Bellotti
- Dipartimento di Medicina Molecolare, Università di Pavia, 27100 Pavia, Italy.,Centre for Amyloidosis and Acute Phase Proteins, Division of Medicine, University College London, London NW3 2PF, UK
| | - Federico Fogolari
- DMIF, Università di Udine, 33100 Udine, Italy.,INBB, Viale Medaglie d'Oro 305, 00136 Roma, Italy
| | - Gennaro Esposito
- Science Division, New York University Abu Dhabi, Abu Dhabi, UAE. .,INBB, Viale Medaglie d'Oro 305, 00136 Roma, Italy
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8
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Ghosh G, Panicker L. Protein-nanoparticle interactions and a new insight. SOFT MATTER 2021; 17:3855-3875. [PMID: 33885450 DOI: 10.1039/d0sm02050h] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The study of protein-nanoparticle interactions provides knowledge about the bio-reactivity of nanoparticles, and creates a database of nanoparticles for applications in nanomedicine, nanodiagnosis, and nanotherapy. The problem arises when nanoparticles come in contact with physiological fluids such as plasma or serum, wherein they interact with the proteins (or other biomolecules). This interaction leads to the coating of proteins on the nanoparticle surface, mostly due to the electrostatic interaction, called 'corona'. These proteins are usually partially unfolded. The protein corona can deter nanoparticles from their targeted functionalities, such as drug/DNA delivery at the site and fluorescence tagging of diseased tissues. The protein corona also has many repercussions on cellular intake, inflammation, accumulation, degradation, and clearance of the nanoparticles from the body depending on the exposed part of the proteins. Hence, the protein-nanoparticle interaction and the configuration of the bound-proteins on the nanosurface need thorough investigation and understanding. Several techniques such as DLS and zeta potential measurement, UV-vis spectroscopy, fluorescence spectroscopy, circular dichroism, FTIR, and DSC provide valuable information in the protein-nanoparticle interaction study. Besides, theoretical simulations also provide additional understanding. Despite a lot of research publications, the fundamental question remained unresolved. Can we aim for the application of functional nanoparticles in medicine? A new insight, given by us, in this article assumes a reasonable solution to this crucial question.
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Affiliation(s)
- Goutam Ghosh
- UGC-DAE Consortium for Scientific Research, Mumbai Centre, Mumbai 400 085, India.
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9
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Harper-Leatherman AS, Wallace JM, Long JW, Rhodes CP, Graffam ME, Abunar BH, Rolison DR. Redox Cycling within Nanoparticle-Nucleated Protein Superstructures: Electron Transfer between Nanoparticulate Gold, Molecular Reductant, and Cytochrome c. J Phys Chem B 2021; 125:1735-1745. [PMID: 33576630 DOI: 10.1021/acs.jpcb.0c09688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We previously described how thousands of the heme protein cytochrome c (cyt.c) self-organize into multilayered, roughly spherical superstructures as initiated by nucleation around one colloidal gold or silver nanoparticle. Within these superstructures, the protein is stabilized to unfolding in buffered media and survives superstructure encapsulation within silica gels and processing to form bioaerogels. We now report that Au∼cyt.c superstructures in buffered media are not simply static groupings of proteins, but that the Au core and protein corona exhibit dynamic electron-transfer reactions within the superstructure as verified by UV-visible and resonance Raman spectroscopy. Within the superstructure, hundreds to thousands of ferricytochrome c (FeIII-cyt.c) are reduced to ferrocytochrome c (FeII-cyt.c) following first-order kinetics with an average apparent forward rate constant of 1.9 ±0.4 × 10-5 s-1. The reducing power in the microheterogeneous medium is derived from two multielectron reductants: tannic acid used to stabilize the commercial gold sol and the Au nanoparticle at the center of the protein superstructure. Fluorescence monitoring of guanidinium chloride-induced unfolding reveals that superstructure-associated cyt.c is stabilized to unfolding before and after chemical reduction of FeIII-cyt.c to form FeII-cyt.c, indicating that the superstructures remain intact during microheterogeneous redox reactions. Smaller nucleating Au nanoparticles or lower ionic strength in the buffered medium yields a greater extent of cyt.c reduction. Partial oxidation of the cyt.c-associated nanoparticulate Au is verified by X-ray photoelectron spectroscopy. The Au nanoparticle at the heart of the superstructure functions as a direct electron donor to the heme with oxidized Au atoms being recycled back to Au(0) as long as residual tannic acid, derived from the Au sol mother liquor, is present in the aqueous microheterogeneous medium.
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Affiliation(s)
- Amanda S Harper-Leatherman
- Department of Chemistry and Biochemistry, Fairfield University, 1073 North Benson Road, Fairfield, Connecticut 06824, United States
| | - Jean Marie Wallace
- Nova Research, Inc., 1900 Elkin Street, Alexandria, Virginia 22308, United States
| | - Jeffrey W Long
- Surface Chemistry Branch, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Christopher P Rhodes
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, Texas 78666, United States
| | - Molly E Graffam
- Department of Chemistry and Biochemistry, Fairfield University, 1073 North Benson Road, Fairfield, Connecticut 06824, United States
| | - Bayan H Abunar
- Department of Chemistry and Biochemistry, Fairfield University, 1073 North Benson Road, Fairfield, Connecticut 06824, United States
| | - Debra R Rolison
- Surface Chemistry Branch, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
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10
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Lyu Y, Yu J, Guo M, Wang K, Yu Z, Zhang L, Zhang Y, Chen L. New insights into interaction of proteins in extracellular polymeric substances of activated sludge with ciprofloxacin using quartz crystal microbalance with dissipation. CHEMOSPHERE 2021; 263:128044. [PMID: 33297059 DOI: 10.1016/j.chemosphere.2020.128044] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/27/2020] [Accepted: 08/16/2020] [Indexed: 06/12/2023]
Abstract
Proteins in extracellular polymeric substances play a vital role in adsorbing organic contaminants in biological wastewater treatment processes, but there is still lack of a fast and effective approach to monitor their interaction. Quartz crystal microbalance with dissipation (QCM-D) was used to investigate the binding and viscoelastic properties of ciprofloxacin (CIP) on extracellular proteins from activated sludge by a two-step sequential deposition method. A saturated viscoelastic monolayer of proteins was formed on the crystal by injecting 500 mg L-1 extracellular proteins. Binding of CIP with the extracellular proteins film followed the pseudo-first-order kinetic equation and Langmuir model, with the maximum binding capacity of 172.4 mg g-1. The binding mass, energy dissipation, and reaction rate constant increased with increasing CIP concentration. A strong binding was obtained at pH 5, suggesting electrostatic interactions as the dominating binding mechanism. Cations inhibited CIP binding with extracellular proteins, probably due to cations competition. Two binding periods were distinguished according to the viscoelastic properties of CIP layer: viscous binding in the initial period and elastic towards binding saturation. Results highlighted QCM-D as an effective and real-time technique to evaluate the role of extracellular proteins in contaminants removal.
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Affiliation(s)
- Yang Lyu
- Department of Civil and Environmental Engineering, Ningbo University, Ningbo, 315211, China
| | - Jie Yu
- Department of Civil and Environmental Engineering, Ningbo University, Ningbo, 315211, China.
| | - Minhui Guo
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Kan Wang
- Department of Civil and Environmental Engineering, Ningbo University, Ningbo, 315211, China
| | - Zhenxun Yu
- Department of Civil and Environmental Engineering, Ningbo University, Ningbo, 315211, China
| | - Lingxiao Zhang
- Department of Civil and Environmental Engineering, Ningbo University, Ningbo, 315211, China
| | - Ying Zhang
- Department of Civil and Environmental Engineering, Ningbo University, Ningbo, 315211, China
| | - Leilei Chen
- Department of Civil and Environmental Engineering, Ningbo University, Ningbo, 315211, China
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11
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Pont L, Marin G, Vergara-Barberán M, Gagliardi LG, Sanz-Nebot V, Herrero-Martínez JM, Benavente F. Polymeric monolithic microcartridges with gold nanoparticles for the analysis of protein biomarkers by on-line solid-phase extraction capillary electrophoresis-mass spectrometry. J Chromatogr A 2020; 1622:461097. [PMID: 32381302 DOI: 10.1016/j.chroma.2020.461097] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/30/2020] [Accepted: 03/31/2020] [Indexed: 01/08/2023]
Abstract
In this study, polymeric monoliths with gold nanoparticles (AuNP@monolith) were investigated as microcartridges for the analysis of protein biomarkers by on-line solid-phase extraction capillary electrophoresis-mass spectrometry (SPE-CE-MS). "Plug-and-play" microcartridges (7 mm) were prepared from a glycidyl methacrylate (GMA)-based monolithic capillary column (5 cm x 250 µm i.d.), which was modified with ammonia and subsequently functionalized with gold nanoparticles (AuNPs). The performance of these novel microcartridges was evaluated with human transthyretin (TTR), which is a protein related to different types of familial amyloidotic polyneuropathies (FAP). Protein retention depended on the isoelectric point of the protein (TTR pI~5.4) and elution was achieved with a basic phosphate solution. Under the optimized conditions, limits of detection (LODs) for TTR by AuNP@monolith-SPE-CE-MS were 50 times lower than by CE-MS (5 vs 250 mg•L-1, with an ion trap (IT) mass spectrometer). The sensitivity enhancement was similar compared to SPE-CE-MS using immunoaffinity (IA) microcartridges with intact antibodies against TTR. Linearity, repeatability in migration times and peak areas, reusability, reproducibility and application to serum samples were also evaluated.
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Affiliation(s)
- Laura Pont
- Department of Chemical Engineering and Analytical Chemistry, Institute for Research on Nutrition and Food Safety (INSA•UB), University of Barcelona, C/Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Gemma Marin
- Department of Chemical Engineering and Analytical Chemistry, Institute for Research on Nutrition and Food Safety (INSA•UB), University of Barcelona, C/Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - María Vergara-Barberán
- Department of Analytical Chemistry, University of Valencia, C/Doctor Moliner 50, 46100 Burjassot, Spain
| | - Leonardo G Gagliardi
- Laboratorio de Investigación y Desarrollo de Métodos Analíticos, LIDMA, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CIC-PBA CONICET, C/ 47 esq. 115, B1900AJL La Plata, Argentina
| | - Victoria Sanz-Nebot
- Department of Chemical Engineering and Analytical Chemistry, Institute for Research on Nutrition and Food Safety (INSA•UB), University of Barcelona, C/Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - José M Herrero-Martínez
- Department of Analytical Chemistry, University of Valencia, C/Doctor Moliner 50, 46100 Burjassot, Spain.
| | - Fernando Benavente
- Department of Chemical Engineering and Analytical Chemistry, Institute for Research on Nutrition and Food Safety (INSA•UB), University of Barcelona, C/Martí i Franquès 1-11, 08028 Barcelona, Spain.
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12
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Protein adsorption dynamics to polymer surfaces revisited-A multisystems approach. Biointerphases 2019; 14:051005. [PMID: 31578069 DOI: 10.1116/1.5121249] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Performance and safety of materials in contact with living matter are determined by sequential and competitive protein adsorption. However, cause and consequences of these processes remain hard to be generalized and predicted. In a new attempt to address that challenge, the authors compared and analyzed the protein adsorption and displacement on various thoroughly characterized polymer substrates using a combination of surface-sensitive techniques. A multiple linear regression approach was applied to model the dependence of protein adsorption, desorption, and exchange dynamics on protein and surface characteristics. While the analysis confirmed that protein properties primarily govern the observed adsorption and retention phenomena and hydrophobicity as well as surface charge are the most relevant polymer surface properties, the authors have identified several protein-surface combinations that deviate from these patterns and deserve further investigation.
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13
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Applications of rice protein in nanomaterials synthesis, nanocolloids of rice protein, and bioapplicability. Int J Biol Macromol 2018; 120:394-404. [PMID: 30144545 DOI: 10.1016/j.ijbiomac.2018.08.101] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 07/07/2018] [Accepted: 08/21/2018] [Indexed: 12/14/2022]
Abstract
Rice protein conjugated nanomaterials were synthesized and characterized by using anionic and cationic forms of rice protein. Both forms showed unique characteristic features when used in in situ reaction conditions for synthesizing the protein stabilized gold (Au) and silver (Ag) nanoparticles (NPs). Au NPs synthesis was highly facilitated than Ag NPs synthesis while the reverse was true when rice protein was simply used in the basic medium. Photophysical behavior clearly showed the contributions of both electrostatic and non-electrostatic interactions driving the rice protein surface adsorption on nanometallic surfaces. Rice protein conjugated NPs were easily transferred and extracted into the organic phase while the extraction process was related to the amount of protein coating. Under the controlled pH reaction conditions, rice protein - dye colored NPs were synthesized which were further characterized by the DLS and SDS Page analysis. Both rice protein conjugated Au/Ag NPs and rice protein NPs showed remarkable biocompatibility with blood cells. These NPs demonstrated their excellent ability to selectively extract protein fractions from complex biological fluid like serum. The results proposed significant applications of rice protein conjugated NPs in biological systems as well as bio-nanotechnology.
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14
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Lu A, Wu Z, Luo X, Li S. Protein adsorption and macrophage uptake of zwitterionic sulfobetaine containing micelles. Colloids Surf B Biointerfaces 2018; 167:252-259. [PMID: 29674293 DOI: 10.1016/j.colsurfb.2018.04.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/30/2018] [Accepted: 04/08/2018] [Indexed: 11/15/2022]
Abstract
Micelles of poly(ε-caprolactone)-b-poly(N,N-diethylaminoethyl methacrylate)/(N-(3-sulfopropyl-N-methacryloxyethy-N,N-diethylammonium betaine)) (PCL-PDEAPS) and poly(ε-caprolactone)-b-poly(ethylene glycol) (PCL-PEG) were prepared and characterized. The interactions of micelles with model proteins such as bovine serum albumin (BSA), lysozyme (Ly), fibrinogen (Fg) and plasma were studied from adsorption quantity, micelle size, polydispersity index (PDI) and zeta-potential measurements. The adsorption quantity of negatively charged proteins on PCL-PDEAPS micelles containing zwitterionic sulfobetaine is larger than on non-ionic PEG-PCL micelles. The adsorption amount increases with the increase of zwitterionic content. And the quantity of adsorbed Fg is much higher than that of BSA because the former is much larger than the latter. In contrast, adsorption of positively charged Ly on copolymer micelle is very low. The interactions between micelles and model proteins are not only dependent on the hydration of zwitterions in PCL-PDEAPS micelles, but also on the electrostatic effect between proteins and micelles. Moreover, the adsorption of three model proteins on the mixed micelles of PCL-PDEAPS and PCL-PEG copolymers is related to the ratio of two copolymers. Denaturation of the proteins is not detected during adsorption and detachment process. PCL-PDEAPS micelles with positive charge are not swallowed by the macrophages after plasma absorption, in contrast to PCL-PEG micelles.
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Affiliation(s)
- Aijing Lu
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, PR China; Institut Européen des Membranes, UMR CNRS 5635, Université de Montpellier, Place Eugene Bataillon, 34095 Montpellier Cedex 5, France
| | - Zhengzhong Wu
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, PR China
| | - Xianglin Luo
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, PR China; State Key Lab of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China.
| | - Suming Li
- Institut Européen des Membranes, UMR CNRS 5635, Université de Montpellier, Place Eugene Bataillon, 34095 Montpellier Cedex 5, France.
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15
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Cantarutti C, Raj G, Fogolari F, Giorgetti S, Corazza A, Bellotti V, Naumov P, Esposito G. Interference of citrate-stabilized gold nanoparticles with β2-microglobulin oligomeric association. Chem Commun (Camb) 2018; 54:5422-5425. [DOI: 10.1039/c8cc01053f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Citrate-coated gold nanoparticles interfere with the association equilibria of β2-microglobulin and thus inhibit the early events of fibrillogenesis.
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Affiliation(s)
| | - Gijo Raj
- New York University Abu Dhabi
- Abu Dhabi
- United Arab Emirates
| | | | - Sofia Giorgetti
- Dipartimento di Medicina Molecolare
- Università di Pavia
- 27100 Pavia
- Italy
| | | | - Vittorio Bellotti
- Dipartimento di Medicina Molecolare
- Università di Pavia
- 27100 Pavia
- Italy
- Division of Medicine
| | - Panče Naumov
- New York University Abu Dhabi
- Abu Dhabi
- United Arab Emirates
| | - Gennaro Esposito
- New York University Abu Dhabi
- Abu Dhabi
- United Arab Emirates
- INBB
- 00136 Roma
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16
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Ten-Doménech I, Simó-Alfonso EF, Herrero-Martínez JM. Isolation of human milk whey proteins by solid phase extraction with a polymeric material modified with gold nanoparticles. Microchem J 2017. [DOI: 10.1016/j.microc.2017.03.058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Marouzi S, Sharifi Rad A, Beigoli S, Teimoori Baghaee P, Assaran Darban R, Chamani J. Study on effect of lomefloxacin on human holo-transferrin in the presence of essential and nonessential amino acids: Spectroscopic and molecular modeling approaches. Int J Biol Macromol 2017; 97:688-699. [DOI: 10.1016/j.ijbiomac.2017.01.047] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 01/09/2017] [Accepted: 01/10/2017] [Indexed: 01/08/2023]
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18
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Patrick MM, Grillot JM, Derden ZM, Paul DW. Long-term Drifts in Sensitivity Caused by Biofouling of an Amperometric Oxygen Sensor. ELECTROANAL 2016. [DOI: 10.1002/elan.201600653] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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19
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Vergara-Barberán M, Lerma-García MJ, Simó-Alfonso EF, Herrero-Martínez JM. Solid-phase extraction based on ground methacrylate monolith modified with gold nanoparticles for isolation of proteins. Anal Chim Acta 2016; 917:37-43. [PMID: 27026598 DOI: 10.1016/j.aca.2016.02.043] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 02/24/2016] [Accepted: 02/26/2016] [Indexed: 01/25/2023]
Abstract
In this study, a novel polymeric material functionalized with gold nanoparticles (AuNPs) was prepared as solid-phase extraction (SPE) sorbent for isolation of proteins. The sorbent was synthesized from a powdered poly(glycidyl-co-ethylene dimethacrylate) monolith, and modified with ammonia, followed by immobilization of AuNPs on the pore surface of the material. To evaluate the performance of this SPE support, proteins were selected as test solutes, being the extraction conditions and other parameters (loading capacity and regenerative ability of sorbent) established. The results indicated that this sorbent could be employed to selectively capture proteins according to their pI, on the basis of the strong affinity of these biomacromolecules towards to AuNPs surface. The applicability of this sorbent was demonstrated by isolating protein species of interest (bovine serum albumin, cytochrome c and lectins in European mistletoe leaves), followed by SDS-PAGE analysis.
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Affiliation(s)
- María Vergara-Barberán
- Department of Analytical Chemistry, University of Valencia, C. Doctor Moliner 50, E-46100 Burjassot, Valencia, Spain.
| | - María Jesús Lerma-García
- Department of Analytical Chemistry, University of Valencia, C. Doctor Moliner 50, E-46100 Burjassot, Valencia, Spain
| | | | - José Manuel Herrero-Martínez
- Department of Analytical Chemistry, University of Valencia, C. Doctor Moliner 50, E-46100 Burjassot, Valencia, Spain.
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20
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Zheng T, Cherubin P, Cilenti L, Teter K, Huo Q. A simple and fast method to study the hydrodynamic size difference of protein disulfide isomerase in oxidized and reduced form using gold nanoparticles and dynamic light scattering. Analyst 2015; 141:934-8. [PMID: 26647758 DOI: 10.1039/c5an02248g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydrodynamic dimension of a protein is a reflection of both its molecular weight and its tertiary structures. Studying the hydrodynamic dimensions of proteins in solutions can help elucidate the structural properties of proteins. Here we report a simple and fast method to measure the hydrodyamic size of a relatively small protein, protein disulfide isomerase (PDI), using gold nanoparticle probes combined with dynamic light scattering. Proteins can readily adsorb to citrate-capped gold nanoparticles to form a protein corona. By measuring the average diameter of the gold nanoparticles before and after protein corona formation, the hydrodynamic diameter of the protein can be deduced from the net particle size increase of the assay solution. This study found that when the disulfide bonds in PDI are reduced to thiols, the reduced PDI exhibits a smaller hydrodynamic diameter than the oxided PDI. This finding is in good agreement with the X-ray diffraction analysis of PDI in single crystals. In comparison with other techniques that are used for protein hydrodynamic size analysis, the current method is easy to use, requires a trace amount of protein samples, with results obtained in minutes instead of hours.
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Affiliation(s)
- Tianyu Zheng
- NanoScience Technology Center and Department of Chemistry, University of Central Florida, 12424 Research Parkway Suite 400, Orlando, FL 32826, USA.
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21
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Daggumati P, Matharu Z, Wang L, Seker E. Biofouling-Resilient Nanoporous Gold Electrodes for DNA Sensing. Anal Chem 2015; 87:8618-22. [DOI: 10.1021/acs.analchem.5b02969] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Pallavi Daggumati
- Department of Electrical
and Computer Engineering, University of California, Davis, California 95616, United States
| | - Zimple Matharu
- Department of Electrical
and Computer Engineering, University of California, Davis, California 95616, United States
| | - Ling Wang
- Department of Electrical
and Computer Engineering, University of California, Davis, California 95616, United States
| | - Erkin Seker
- Department of Electrical
and Computer Engineering, University of California, Davis, California 95616, United States
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22
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Moerz ST, Kraegeloh A, Chanana M, Kraus T. Formation Mechanism for Stable Hybrid Clusters of Proteins and Nanoparticles. ACS NANO 2015; 9:6696-705. [PMID: 26030129 DOI: 10.1021/acsnano.5b01043] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Citrate-stabilized gold nanoparticles (AuNP) agglomerate in the presence of hemoglobin (Hb) at acidic pH. The extent of agglomeration strongly depends on the concentration ratio [Hb]/[AuNP]. Negligible agglomeration occurs at very low and very high [Hb]/[AuNP]. Full agglomeration and precipitation occur at [Hb]/[AuNP] corresponding to an Hb monolayer on the AuNP. Ratios above and below this value lead to the formation of an unexpected phase: stable, microscopic AuNP-Hb agglomerates. We investigated the kinetics of agglomeration with dynamic light scattering and the adsorption kinetics of Hb on planar gold with surface-acoustic wave-phase measurements. Comparing agglomeration and adsorption kinetics leads to an explanation of the complex behavior of this nanoparticle-protein mixture. Agglomeration is initiated either when Hb bridges AuNP or when the electrostatic repulsion between AuNP is neutralized by Hb. It is terminated when Hb has been depleted or when Hb forms multilayers on the agglomerates that stabilize microscopic clusters indefinitely.
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Affiliation(s)
- Sebastian T Moerz
- †INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Annette Kraegeloh
- †INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Munish Chanana
- ‡Physikalische Chemie II, Universität Bayreuth, 95440 Bayreuth, Germany
| | - Tobias Kraus
- †INM - Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
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23
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McDonagh BH, Volden S, Lystvet SM, Singh G, Ese MHG, Ryan JA, Lindgren M, Sandvig A, Sandvig I, Glomm WR. Self-assembly and characterization of transferrin-gold nanoconstructs and their interaction with bio-interfaces. NANOSCALE 2015; 7:8062-70. [PMID: 25873450 DOI: 10.1039/c5nr01284h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Transferrin (Tf) conjugated to gold nanoparticles and clusters combine the protein's site-specific receptor targeting capabilities with the optical properties imparted by the nano-sized gold. We have described two different synthesis protocols, one yielding fluorescent Tf-stabilized gold nanoclusters (AuNCs) and one yielding Tf-stabilized gold nanoparticles that exhibit localized surface plasmon resonance. We demonstrate that the synthetic route employed has a large influence both on the gold nanostructure formed, and also on the structural integrity of the protein. A slight protein unfolding allows stronger interaction with lipids, and was found to significantly perturb lipid monolayers. Interactions between the protein-gold nanostructures and three different cell types were also assessed, indicating that the enhanced membrane affinity may be attributed to intercellular membrane differences.
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Affiliation(s)
- Birgitte H McDonagh
- Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway.
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24
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Mørch Ý, Hansen R, Berg S, Åslund AKO, Glomm WR, Eggen S, Schmid R, Johnsen H, Kubowicz S, Snipstad S, Sulheim E, Hak S, Singh G, McDonagh BH, Blom H, de Lange Davies C, Stenstad PM. Nanoparticle-stabilized microbubbles for multimodal imaging and drug delivery. CONTRAST MEDIA & MOLECULAR IMAGING 2015; 10:356-66. [DOI: 10.1002/cmmi.1639] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 02/06/2015] [Accepted: 02/13/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Ýrr Mørch
- SINTEF Materials and Chemistry; P.O. Box 4760 Sluppen 7465 Trondheim Norway
| | - Rune Hansen
- SINTEF Technology and Society; P.O. Box 4760 Sluppen 7465 Trondheim Norway
| | - Sigrid Berg
- SINTEF Technology and Society; P.O. Box 4760 Sluppen 7465 Trondheim Norway
| | - Andreas K. O. Åslund
- Department of Physics; Norwegian University of Science and Technology; 7491 Trondheim Norway
| | - Wilhelm R. Glomm
- SINTEF Materials and Chemistry; P.O. Box 4760 Sluppen 7465 Trondheim Norway
- Department of Chemical Engineering; Norwegian University of Science and Technology; 7491 Trondheim Norway
| | - Siv Eggen
- Department of Physics; Norwegian University of Science and Technology; 7491 Trondheim Norway
| | - Ruth Schmid
- SINTEF Materials and Chemistry; P.O. Box 4760 Sluppen 7465 Trondheim Norway
| | - Heidi Johnsen
- SINTEF Materials and Chemistry; P.O. Box 4760 Sluppen 7465 Trondheim Norway
| | - Stephan Kubowicz
- SINTEF Materials and Chemistry; P.O. Box 4760 Sluppen 7465 Trondheim Norway
| | - Sofie Snipstad
- Department of Physics; Norwegian University of Science and Technology; 7491 Trondheim Norway
| | - Einar Sulheim
- Department of Physics; Norwegian University of Science and Technology; 7491 Trondheim Norway
| | - Sjoerd Hak
- Department of Physics; Norwegian University of Science and Technology; 7491 Trondheim Norway
- Department of Circulation and Medical Imaging; Norwegian University of Science and Technology; 7030 Trondheim Norway
| | - Gurvinder Singh
- Department of Chemical Engineering; Norwegian University of Science and Technology; 7491 Trondheim Norway
| | - Birgitte H. McDonagh
- Department of Chemical Engineering; Norwegian University of Science and Technology; 7491 Trondheim Norway
| | - Hans Blom
- Science for Life Laboratory; Box 1031 17121 Solna Sweden
| | | | - Per M. Stenstad
- SINTEF Materials and Chemistry; P.O. Box 4760 Sluppen 7465 Trondheim Norway
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25
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Zheng T, Pierre-Pierre N, Yan X, Huo Q, Almodovar AJO, Valerio F, Rivera-Ramirez I, Griffith E, Decker DD, Chen S, Zhu N. Gold nanoparticle-enabled blood test for early stage cancer detection and risk assessment. ACS APPLIED MATERIALS & INTERFACES 2015; 7:6819-27. [PMID: 25757512 DOI: 10.1021/acsami.5b00371] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
When citrate ligands-capped gold nanoparticles are mixed with blood sera, a protein corona is formed on the nanoparticle surface due to the adsorption of various proteins in the blood to the nanoparticles. Using a two-step gold nanoparticle-enabled dynamic light scattering assay, we discovered that the amount of human immunoglobulin G (IgG) in the gold nanoparticle protein corona is increased in prostate cancer patients compared to noncancer controls. Two pilot studies conducted on blood serum samples collected at Florida Hospital and obtained from Prostate Cancer Biorespository Network (PCBN) revealed that the test has a 90-95% specificity and 50% sensitivity in detecting early stage prostate cancer, representing a significant improvement over the current PSA test. The increased amount of human IgG found in the protein corona is believed to be associated with the autoantibodies produced in cancer patients as part of the immunodefense against tumor. Proteomic analysis of the nanoparticle protein corona revealed molecular profile differences between cancer and noncancer serum samples. Autoantibodies and natural antibodies produced in cancer patients in response to tumorigenesis have been found and detected in the blood of many cancer types. The test may be applicable for early detection and risk assessment of a broad spectrum of cancer. This new blood test is simple, low cost, requires only a few drops of blood sample, and the results are obtained within minutes. The test is well suited for screening purpose. More extensive studies are being conducted to further evaluate and validate the clinical potential of the new test.
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Affiliation(s)
| | | | | | | | - Alvin J O Almodovar
- ∥Florida Hospital Cancer Institute, Research and Development, 2501 North Orange Avenue, Suite 247, Orlando, Florida 32804, United States
| | - Felipe Valerio
- ∥Florida Hospital Cancer Institute, Research and Development, 2501 North Orange Avenue, Suite 247, Orlando, Florida 32804, United States
| | - Inoel Rivera-Ramirez
- ∥Florida Hospital Cancer Institute, Research and Development, 2501 North Orange Avenue, Suite 247, Orlando, Florida 32804, United States
| | - Elizabeth Griffith
- ∥Florida Hospital Cancer Institute, Research and Development, 2501 North Orange Avenue, Suite 247, Orlando, Florida 32804, United States
| | - David D Decker
- ∥Florida Hospital Cancer Institute, Research and Development, 2501 North Orange Avenue, Suite 247, Orlando, Florida 32804, United States
| | - Sixue Chen
- ⊥Department of Biology, Genetics Institute, Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, Florida 32610, United States
| | - Ning Zhu
- ⊥Department of Biology, Genetics Institute, Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, Florida 32610, United States
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26
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McDonagh BH, Singh G, Bandyopadhyay S, Lystvet SM, Ryan JA, Volden S, Kim E, Sandvig I, Sandvig A, Glomm WR. Controlling the self-assembly and optical properties of gold nanoclusters and gold nanoparticles biomineralized with bovine serum albumin. RSC Adv 2015. [DOI: 10.1039/c5ra23423a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
While the size-dependent optical properties of BSA-stabilized gold nanoclusters are well known, the time-dependent growth mechanism remains to be described.
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Affiliation(s)
- Birgitte H. McDonagh
- Ugelstad Laboratory
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- 7491 Trondheim
- Norway
| | - Gurvinder Singh
- Department of Materials Science and Engineering
- Norwegian University of Science and Technology (NTNU)
- N-7491 Trondheim
- Norway
| | - Sulalit Bandyopadhyay
- Ugelstad Laboratory
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- 7491 Trondheim
- Norway
| | - Sina M. Lystvet
- Ugelstad Laboratory
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- 7491 Trondheim
- Norway
| | | | - Sondre Volden
- Ugelstad Laboratory
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- 7491 Trondheim
- Norway
| | - Eugene Kim
- Department of Circulation and Medical Imaging
- Norwegian University of Science and Technology (NTNU)
- N-7491 Trondheim
- Norway
| | - Ioanna Sandvig
- John Van Geest Centre for Brain Repair
- Department of Clinical Neurosciences
- University of Cambridge
- CB2 OPY Cambridge
- UK
| | - Axel Sandvig
- Department of Neuroscience
- Faculty of Medicine
- Norwegian University of Science and Technology (NTNU)
- Trondheim
- Norway
| | - Wilhelm R. Glomm
- Ugelstad Laboratory
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- 7491 Trondheim
- Norway
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27
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Shumyantseva VV, Sigolaeva LV, Agafonova LE, Bulko TV, Pergushov DV, Schacher FH, Archakov AI. Facilitated biosensing via direct electron transfer of myoglobin integrated into diblock copolymer/multi-walled carbon nanotube nanocomposites. J Mater Chem B 2015; 3:5467-5477. [DOI: 10.1039/c5tb00442j] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sequential drop-casting of a MWCNTs suspension and a amphiphilic copolymer micellar solution onto an electrode results in a favorable nanocomposite for integration of myoglobin, showing facilitated direct electron transfer.
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Affiliation(s)
| | | | | | | | | | - Felix H. Schacher
- Institute of Organic and Macromolecular Chemistry
- Friedrich-Schiller-University Jena
- D-07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
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28
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Zhang S, Moustafa Y, Huo Q. Different interaction modes of biomolecules with citrate-capped gold nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2014; 6:21184-21192. [PMID: 25347206 DOI: 10.1021/am506112u] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, we investigated the interaction between five biorelevant molecules and citrate-capped gold nanoparticles using dynamic light scattering, ζ-potential analysis, UV-vis absorption spectroscopy, and transmission electron microscopy. The five biomolecules are bovine serum albumin (BSA), two immunoglobulin G (IgG) proteins, immunoglobulin M (IgM), and a polysaccharide molecule, hyaluronan. BSA, IgG, and IgM are high abundance proteins in blood. Hyaluronan is a major component of the extracellular matrix. An abnormal level of hyaluronan in blood is associated with a number of medical conditions including rheumatoid arthritis and malignancy. Five different interaction modes were observed from these molecules. While BSA and IgM interact with the gold nanoparticles by forming electrostatic interactions with the citrate ligands, IgG and hyaluronan adsorb to the nanoparticle metal core by displacing the citrate ligands. BSA, rabbit IgG, and hyaluronan formed a stable monolayer on the nanoparticle surface. Human IgG and IgM caused nanoparticle cluster formation upon interacting with the gold nanoparticles. For the first time, we discovered that hyaluronan, a highly negatively charged polyglycosaminoglycan, exhibits an exceptionally strong affinity toward the citrate-gold nanoparticles. It can effectively compete with IgG to adsorb to the gold nanoparticles. This finding has exciting implications for future research: the molecular composition of a protein corona formed on a nanoparticle surface upon mixing the nanoparticle with blood or other biological fluids may vary according to the pathological conditions of individuals, and the analysis of these compositions could potentially lead to new biomarker discovery with diagnostic applications.
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Affiliation(s)
- Shiyun Zhang
- NanoScience Technology Center, Department of Chemistry, College of Science, and Burnett School of Biomedical Science, College of Medicine, University of Central Florida , 12424 Research Parkway, Suite 400, Orlando, Florida 32826, United States
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29
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O'Brien MN, Radha B, Brown KA, Jones MR, Mirkin CA. Langmuir analysis of nanoparticle polyvalency in DNA-mediated adsorption. Angew Chem Int Ed Engl 2014; 53:9532-8. [PMID: 25044776 DOI: 10.1002/anie.201405317] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Indexed: 01/13/2023]
Abstract
Many nanoparticle adsorption processes are dictated by the collective interactions of surface-bound ligands. These adsorption processes define how nanoparticles interact with biological systems and enable the assembly of nanoparticle-based materials and devices. Herein, we present an approach for quantifying nanoparticle adsorption thermodynamics in a manner that satisfies the assumptions of the Langmuir model. Using this approach, we study the DNA-mediated adsorption of polyvalent anisotropic nanoparticles on surfaces and explore how deviations from model assumptions influence adsorption thermodynamics. Importantly, when combined with a solution-based van't Hoff analysis, we find that polyvalency plays a more important role as the individual interactions become weaker. Furthermore, we find that the free energy of anisotropic nanoparticle adsorption is consistent across multiple shapes and sizes of nanoparticles based on the surface area of the interacting facet.
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Affiliation(s)
- Matthew N O'Brien
- Department of Chemistry, International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Rd, Evanston, IL 60208 (USA)
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30
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O'Brien MN, Radha B, Brown KA, Jones MR, Mirkin CA. Langmuir Analysis of Nanoparticle Polyvalency in DNA-Mediated Adsorption. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405317] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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Schollbach M, Zhang F, Roosen-Runge F, Skoda MWA, Jacobs RMJ, Schreiber F. Gold nanoparticles decorated with oligo(ethylene glycol) thiols: surface charges and interactions with proteins in solution. J Colloid Interface Sci 2014; 426:31-8. [PMID: 24863761 DOI: 10.1016/j.jcis.2014.03.052] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 03/24/2014] [Accepted: 03/25/2014] [Indexed: 11/30/2022]
Abstract
We have studied oligo(ethylene glycol) (OEG) thiol self-assembled monolayer (SAM) coated gold nanoparticles (AuOEG) and their interactions with proteins in solutions using electrophoretic and dynamic light scattering (ELS and DLS). The results are compared with poly(ethylene glycol) (PEG) thiol coated AuNPs (AuPEG). We show that both AuOEG and AuPEG particles carry a low net negative charge and are very stable (remaining so for more than one year), but long-term aging or dialysis can reduce the stability. If the decorated AuNPs are mixed with bovine serum albumin (BSA), both effective size and zeta-potential of the AuNPs remain unchanged, indicating no adsorption of BSA to the colloid surface. However, when mixed with lysozyme, zeta-potential values increase with protein concentrations and lead to a charge inversion, indicating adsorption of lysozyme to the colloid surface. The colloidal solutions of AuOEG become unstable near zero charge, indicated by a cluster peak in the DLS measurements. The AuPEG solutions show similar charge inversion upon addition of lysozyme, but the solutions are stable under all experimental conditions, presumably because of the strong steric effect of PEG. Washing the protein bound colloids by centrifugation can remove only part of the adsorbed lysozyme molecules indicating that a few proteins adsorb strongly to the colloids. The effective charge inversion and rather strongly bound lysozyme on the colloid surface may suggest that in addition to the charges formed at the SAM-water interface, there are defects on the surface of the colloid, which are accessible to the proteins. The results of this study of surface charge, and stability shed light on the interaction with proteins of SAM coated AuNPs and their applications.
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Affiliation(s)
- Moritz Schollbach
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen, Germany
| | - Fajun Zhang
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen, Germany.
| | - Felix Roosen-Runge
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen, Germany
| | - Maximilian W A Skoda
- STFC, ISIS, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0OX, United Kingdom
| | - Robert M J Jacobs
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road OX1 3TA, United Kingdom
| | - Frank Schreiber
- Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, D-72076 Tübingen, Germany
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32
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Yang Z, Zhang C, Huang L. Quartz crystal microbalance for comparison of calcium phosphate precipitation on planar and rough phospholipid bilayers. Colloids Surf B Biointerfaces 2014; 116:265-9. [PMID: 24495457 DOI: 10.1016/j.colsurfb.2013.10.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 10/26/2013] [Accepted: 10/31/2013] [Indexed: 11/27/2022]
Abstract
The planar and rough phospholipid bilayers at the surfaces of quartz crystal and titania-modified quartz crystal were fabricated via the surface modification, respectively, and characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), cyclic voltammetry (CV) and piezoelectric measurement. The formation of calcium phosphate on planar and rough phospholipid bilayers was investigated in detail using in situ quartz crystal microbalance (QCM) and X-ray diffraction (XRD) techniques. The obtained results showed that the calcium phosphate precipitation was closely related to the roughness and surface potential of phospholipid bilayers. Compared with planar phospholipid bilayers, the rough phospholipid bilayers exhibited a higher deposition rate of calcium phosphate. The presence of anionic phosphatidylserine (PS) in phosphatidylcholine (PC)/PS phospholipid induced PC/PS surface with negative charge, thus showing significantly enhanced calcium phosphate precipitation.
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Affiliation(s)
- Zhengpeng Yang
- Institute of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China
| | - Chunjing Zhang
- Institute of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Lina Huang
- Institute of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
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33
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Borges J, Campiña JM, Silva AF. Probing the Contribution of Different Intermolecular Forces to the Adsorption of Spheroproteins onto Hydrophilic Surfaces. J Phys Chem B 2013; 117:16565-76. [DOI: 10.1021/jp409238b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- João Borges
- Centro de Investigação
em Química-Linha 4 (CIQ-L4), Departamento de Química
e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007, Porto, Portugal
| | - José M. Campiña
- Centro de Investigação
em Química-Linha 4 (CIQ-L4), Departamento de Química
e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007, Porto, Portugal
| | - A. Fernando Silva
- Centro de Investigação
em Química-Linha 4 (CIQ-L4), Departamento de Química
e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007, Porto, Portugal
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Patel J, Radhakrishnan L, Zhao B, Uppalapati B, Daniels RC, Ward KR, Collinson MM. Electrochemical Properties of Nanostructured Porous Gold Electrodes in Biofouling Solutions. Anal Chem 2013; 85:11610-8. [PMID: 24245771 DOI: 10.1021/ac403013r] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Jay Patel
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Logudurai Radhakrishnan
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Bo Zhao
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Badharinadh Uppalapati
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Rodney C. Daniels
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Kevin R. Ward
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-2006, United States
| | - Maryanne M. Collinson
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284-2006, United States
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35
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Borges J, Campiña JM, Silva AF. Chitosanbiopolymer–F(ab′)2immunoconjugate films for enhanced antigen recognition. J Mater Chem B 2013; 1:500-511. [DOI: 10.1039/c2tb00115b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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36
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Fu Y, Lu D, Lin B, Sun Q, Liu K, Xu L, Zhang S, Hu C, Wang C, Xu Z, Zhang W. Fluorescence assay for glycan expression on living cancer cells based on competitive strategy coupled with dual-functionalized nanobiocomposites. Analyst 2013; 138:7016-22. [DOI: 10.1039/c3an01226c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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37
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Ma C, Wu B, Zhang G. Protein-protein resistance investigated by quartz crystal microbalance. Colloids Surf B Biointerfaces 2012; 104:5-10. [PMID: 23298581 DOI: 10.1016/j.colsurfb.2012.11.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 11/29/2012] [Accepted: 11/30/2012] [Indexed: 11/17/2022]
Abstract
By use of quartz crystal microbalance with dissipation (QCM-D), we have investigated the adsorption of proteins such as fibrinogen, bovine serum albumin or lysozyme on the surface of soy protein film in PBS buffer solution in real time. Our studies demonstrate that the proteins can be adsorbed on soy protein film at a pH between the isoelectric point (pI(sp)) of soy protein film and that (pI(fp)) of the foreign protein, where the adsorption decreases with the concentration of added salt. Beyond the pH range, soy protein generally resists the adsorption of the foreign protein due to electrostatic repulsion, which is slightly affected by the concentration of the added salt in the range we investigated. At a pH close to pI(sp) or pI(fp), the proteins can also be adsorbed on soy protein film due to hydrophobic interactions. The present study reveals that the protein resistance of soy protein film is determined by electrostatic interactions, hydrophobic interactions and hydrogen bonding between the foreign protein and soy protein.
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Affiliation(s)
- Chunfeng Ma
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
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Goda T, Miyahara Y. Interpretation of protein adsorption through its intrinsic electric charges: a comparative study using a field-effect transistor, surface plasmon resonance, and quartz crystal microbalance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14730-8. [PMID: 22992058 DOI: 10.1021/la302977s] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We describe the highly sensitive detection of the nonspecific adsorption of proteins onto a 1-undecanethiol self-assembled monolayer (SAM)-formed gold electrode by parallel analysis using field effect transistor (FET), surface plasmon resonance (SPR), and quartz crystal microbalance (QCM) sensors. The FET sensor detects the innate electric charges of the adsorbed protein at the electrode/solution interface, transforming the change in charge density into a potentiometric signal in real time, without the requirement for labels. In particular, using the Debye-Huckel model, the degree of potential shift was proportional to the dry mass of adsorbed albumin and β-casein. A comparison of the FET signal with SPR and QCM data provided information on the conformation and orientation of the surface-bound protein by observing characteristic break points in the correlation slopes between the signals. These slope transitions reflect a multistage process that occurs upon protein adsorption as a function of protein concentration, including interim coverage, film dehydration, and monolayer condensation. The FET biosensor, in combination with SPR and QCM, represents a new technology for interrogating protein-material interactions both quantitatively and qualitatively.
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Affiliation(s)
- Tatsuro Goda
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan.
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Goda T, Maeda Y, Miyahara Y. Simultaneous Monitoring of Protein Adsorption Kinetics Using a Quartz Crystal Microbalance and Field-Effect Transistor Integrated Device. Anal Chem 2012; 84:7308-14. [DOI: 10.1021/ac3015092] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tatsuro Goda
- Institute
of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai,
Chiyoda, Tokyo 101-0062, Japan
| | - Yasuhiro Maeda
- Institute
of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai,
Chiyoda, Tokyo 101-0062, Japan
| | - Yuji Miyahara
- Institute
of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai,
Chiyoda, Tokyo 101-0062, Japan
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40
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Giacomelli FC, Stepánek P, Schmidt V, Jäger E, Jäger A, Giacomelli C. Light scattering evidence of selective protein fouling on biocompatible block copolymer micelles. NANOSCALE 2012; 4:4504-4514. [PMID: 22688571 DOI: 10.1039/c2nr30623a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Selective protein fouling on block copolymer micelles with well-known potential for tumour-targeting drug delivery was evidenced by using dynamic light scattering measurements. The stability and interaction of block copolymer micelles with model proteins (BSA, IgG, lysozyme and CytC) is reported for systems featuring a hydrophobic (poly[2-(diisopropylamino)-ethyl methacrylate]) (PDPA) core and hydrophilic coronas comprising poly(ethylene oxide)/poly(glycerol monomethacrylate) (PEO-b-PG2MA) or poly[2-(methacryloyloxy)ethyl phosphorylcholine] (PMPC). The results revealed that protein size and hydrophilic chain density play important roles in the observed interactions. The PEO(113)-b-PG2MA(30)-b-PDPA(50) nanoparticles are stable and protein adsorption is prevented at all investigated protein environments. The successful protein-repellent characteristic of these nanoparticles is attributed to a high hydrophilic surface chain density (>0.1 chains per nm(2)) and to the length of the hydrophilic chains. On the other hand, although PMPC also has protein-repellent characteristics, the low surface chain density of the hydrophilic shell is supposed to enable interactions with small proteins. The PMPC(40)-b-PDPA(70) micelles are stable in BSA and IgG environments due to weak repulsion forces between PMPC and the proteins, to the hydration layer, and particularly to a size-effect where the large BSA (R(H) = 4.2 nm) and IgG (R(H) = 7.0 nm) do not easily diffuse within the PMPC shell. Conversely, a clear interaction was observed with the 2.1 nm radius lysozyme. The lysozyme protein can diffuse within the PMPC micellar shell towards the PDPA hydrophobic core in a process favored by its smaller size and the low hydrophilic PMPC surface chain density (∼0.049 chains per nm(2)) as compared to PEO-b-PG2MA (∼0.110 chains per nm(2)). The same behavior was not evidenced with the 2.3 nm radius positively charged CytC, probably due to its higher surface hydrophilicity and the consequent chemical incompatibility with PDPA.
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Affiliation(s)
- Fernando C Giacomelli
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-170 Santo André, Brazil.
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41
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Zhang C, Yang Z, Zhang C, Sun Y. Kinetics of photocatalytic degradation of atrazine on molecularly imprinted titania film. ASIA-PAC J CHEM ENG 2012. [DOI: 10.1002/apj.1662] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Chunjing Zhang
- Institute of Materials Science and Engineering; Henan Polytechnic University; Jiaozuo; 454000; China
| | - Zhengpeng Yang
- Institute of Materials Science and Engineering; Henan Polytechnic University; Jiaozuo; 454000; China
| | - Chunxiao Zhang
- Nanyang Oilfield Technical Monitoring Center; Nanyang; 473132; China
| | - Yukun Sun
- Institute of Materials Science and Engineering; Henan Polytechnic University; Jiaozuo; 454000; China
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42
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Yang Z, Zhang C. Enhanced photocatalytic performance of molecularly imprinted hydroxyapatite thin film for bilirubin degradation. ASIA-PAC J CHEM ENG 2012. [DOI: 10.1002/apj.1620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Zhengpeng Yang
- Institute of Materials Science and Engineering; Henan Polytechnic University; Jiaozuo; 454000; China
| | - Chunjing Zhang
- Institute of Materials Science and Engineering; Henan Polytechnic University; Jiaozuo; 454000; China
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43
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Satriano C, Svedhem S, Kasemo B. Well-defined lipid interfaces for protein adsorption studies. Phys Chem Chem Phys 2012; 14:16695-8. [DOI: 10.1039/c2cp43254d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Ha TL, Shin J, Lim CW, Lee IS. Seed-mediated Growth of Gold inside Hollow Silica Nanospheres for Sensing Peroxide and Glucose Concentrations. Chem Asian J 2011; 7:36-9. [DOI: 10.1002/asia.201100501] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Indexed: 11/09/2022]
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Mu Y. Effects of surface hydrophobicity on the conformational changes of polypeptides of different length. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2011; 84:031906. [PMID: 22060402 DOI: 10.1103/physreve.84.031906] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Indexed: 05/31/2023]
Abstract
We studied the effects of surface hydrophobicity on the conformational changes of different length polypeptides by calculating the free energy difference between peptide structures using the bias-potential Monte Carlo technique and the probability ratio method. It was found that the hydrophobic surface plays an important role in the stability of secondary structures of the polypeptides with hydrophobic side chains. For short GAAAAG peptides, the hydrophobic surface destabilizes the α helix but stabilizes the β hairpin in the entire temperature region considered in our study. Interestingly, when the surface hydrophobic strength ε(hpsf)≥ε(hp), the most stable structure in the low temperature region changes from α helix to β hairpin, and the corresponding phase transition temperature increases slightly. For longer GAAAAAAAAAAG peptides, the effects of the relatively weak hydrophobic surface (ε(hpsf) < ε(hp)) on α-helical structures may be neglected, while the relatively strongly hydrophobic surface (ε(hpsf)≥ε(hp)) leads to the obvious partial helicity loss. In contrast, the stability of β structures can be enhanced significantly by the hydrophobic surface, especially by the strongly hydrophobic surface, at low and intermediate temperatures. At high temperatures, in addition to thermal fluctuations, the strongly hydrophobic surface (ε(hpsf)>ε(hp)) may further disturb the formation of both α-helical and β structures. Moreover, the phase transition temperature between α-helical structures and random coils significantly decreases due to the helicity loss when ε(hpsf)>ε(hp). Our findings provide a basic and quantitative picture for understanding the effects of a hydrophobic surface on the conformational changes of the polypeptides with hydrophobic side chains. From an application viewpoint, the present study is helpful in developing alternative strategies of producing high-quality biological fibrillar materials and functional nanoscale devices by the self-assembly of the polypeptides on hydrophobic surfaces.
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Affiliation(s)
- Yan Mu
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, China
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46
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Garvey M, Griesser SS, Griesser HJ, Thierry B, Nussio MR, Shapter JG, Ecroyd H, Giorgetti S, Bellotti V, Gerrard JA, Carver JA. Enhanced molecular chaperone activity of the small heat-shock protein alphaB-cystallin following covalent immobilization onto a solid-phase support. Biopolymers 2011; 95:376-89. [PMID: 21225714 DOI: 10.1002/bip.21584] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The well-characterized small heat-shock protein, alphaB-crystallin, acts as a molecular chaperone by interacting with unfolding proteins to prevent their aggregation and precipitation. Structural perturbation (e.g., partial unfolding) enhances the in vitro chaperone activity of alphaB-crystallin. Proteins often undergo structural perturbations at the surface of a synthetic material, which may alter their biological activity. This study investigated the activity of alphaB-crystallin when covalently bound to a support surface; alphaB-crystallin was immobilized onto a range of solid material surfaces, and its characteristics and chaperone activity were assessed. Immobilization was achieved via a plasma-deposited thin polymeric interlayer containing aldehyde surface groups and reductive amination, leading to the covalent binding of alphaB-crystallin lysine residues to the surface aldehyde groups via Schiff-base linkages. Immobilized alphaB-crystallin was characterized by X-ray photoelectron spectroscopy, atomic force microscopy, and quartz crystal microgravimetry, which showed that 300 ng cm(-2) (dry mass) of oligomeric alphaB-crystallin was bound to the surface. Immobilized alphaB-crystallin exhibited a significant enhancement (up to 5000-fold, when compared with the equivalent activity of alphaB-crystallin in solution) of its chaperone activity against various proteins undergoing both amorphous and amyloid fibril forms of aggregation. The enhanced molecular chaperone activity of immobilized alphaB-crystallin has potential applications in preventing protein misfolding, including against amyloid disease processes, such as dialysis-related amyloidosis, and for biodiagnostic detection of misfolded proteins.
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Affiliation(s)
- Megan Garvey
- School of Chemistry and Physics, The University ofAdelaide, Adelaide, South Australia 5005, Australia
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47
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Baio JE, Weidner T, Interlandi G, Mendoza-Barrera C, Canavan HE, Michel R, Castner DG. Probing Albumin Adsorption onto Calcium Phosphates by XPS and ToF-SIMS. JOURNAL OF VACUUM SCIENCE AND TECHNOLOGY. B, NANOTECHNOLOGY & MICROELECTRONICS : MATERIALS, PROCESSING, MEASUREMENT, & PHENOMENA : JVST B 2011; 29:4D113. [PMID: 22267900 PMCID: PMC3260791 DOI: 10.1116/1.3613919] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Accepted: 06/24/2011] [Indexed: 05/28/2023]
Abstract
In this study the binding and assembly of bovine serum albumin (BSA) onto three different calcium phosphate phases (hydroxyapatite, dibasic calcium phosphate dihydrate, and β-tricalcium phosphate) was investigated using a combination of X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). XPS was used to record adsorption isotherms and to quantify the amount of BSA adsorbed onto the different CaP surfaces. On all three surfaces a monolayer of adsorbed BSA was formed. ToF-SIMS was then used to investigate how the structure of BSA changes upon surface binding. ToF-SIMS data from BSA films on the three CaP surfaces showed intensity differences of secondary ions originating from both hydrophobic and hydrophilic amino acids. For a more quantitative examination of structural changes, we developed a ratio comparing the sum of intensities of secondary ions from hydrophobic and hydrophilic residues. A small, but statistically significant, increase in the value of this ratio (7%) was observed between a BSA film on hydroxyapatite versus dibasic calcium phosphate dihydrate. From this ratio we can make some initial hypotheses about what specific changes in BSA structure relate to these differences observed in the ToF-SIMS data.
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Affiliation(s)
- J E Baio
- National ESCA and Surface Analysis Center for Biomedical Problems, Department of Chemical, University of Washington, Seattle, WA 98195
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48
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Becker B, Cooper MA. A survey of the 2006-2009 quartz crystal microbalance biosensor literature. J Mol Recognit 2011; 24:754-87. [DOI: 10.1002/jmr.1117] [Citation(s) in RCA: 138] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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49
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Lystvet SM, Volden S, Yasuda M, Halskau Ø, Glomm WR. Emergent membrane-affecting properties of BSA-gold nanoparticle constructs. NANOSCALE 2011; 3:1788-1797. [PMID: 21359387 DOI: 10.1039/c0nr00948b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
By adsorbing bovine serum albumin (BSA) on gold nanoparticles (Aunps) with diameters 30 nm and 80 nm, different degrees of protein unfolding were obtained. Adsorption and adlayer conformation were characterized by UV-vis spectroscopy, ζ-potential measurements, steady-state and time-resolved fluorescence. The unfolding was also studied using 1-anilino-8-naphthalene sulfonate (ANS) as an extrinsic probe, showing that BSA unfolds more on 80 nm Aunp than on 30 nm Aunp. Langmuir monolayer studies using two distinct methods of introducing the BSA and BSA-Aunp constructs accompanied with Brewster Angle Microscopy (BAM) and Digital Video Microscope (DVM) imaging demonstrated that BSA-Aunp constructs induce film miscibility with L-α-phosphatidylethanolamine not seen for BSA or Aunp alone. The changes induced by partial unfolding clearly give better film-penetration ability, as well as disruption of liquid crystalline domains in the film, thereby inducing film miscibility. Gold or protein only does not possess the nanoscale film-affecting properties of the protein-gold constructs, and as such the surface-active and miscibility-affecting characteristics of the BSA-Aunp represent emergent qualities.
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Affiliation(s)
- Sina M Lystvet
- Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), N-7491, Trondheim, Norway.
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50
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Luna-Vera F, Ferguson JD, Alvarez JC. Real Time Detection of Lysozyme by Pulsed Streaming Potentials Using Polyclonal Antibodies Immobilized on a Renewable Nonfouling Surface Inside Plastic Microfluidic Channels. Anal Chem 2011; 83:2012-9. [DOI: 10.1021/ac102769j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Fernando Luna-Vera
- Department of Chemistry, Virginia Commonwealth University, P.O. Box 842006, Richmond, Virginia 23284, United States
| | - Josephus D. Ferguson
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Julio C. Alvarez
- Department of Chemistry, Virginia Commonwealth University, P.O. Box 842006, Richmond, Virginia 23284, United States
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