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Jiang F, Meng Y, Mo M, Li Y, Liu Q, Wang P, Li Y, Wei Q. A sensitive electrochemical immunosensor based on high-efficiency catalytic cycle amplification strategy for detection of cardiac troponin I. Bioelectrochemistry 2024; 159:108730. [PMID: 38762950 DOI: 10.1016/j.bioelechem.2024.108730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 04/25/2024] [Accepted: 05/10/2024] [Indexed: 05/21/2024]
Abstract
An electrochemical immunosensor based on the novel high efficiency catalytic cycle amplification strategy for the sensitive detection of cardiac troponin I (cTnI). With its variable valence metal elements and spiny yolk structure, the Cu2O/CuO@CeO2 nanohybrid exhibits high speed charge mobility and exceptional electrochemical performance. Notably, fluorite-like cubic crystal CeO2 shell would undergo redox reaction with Cu2O core, which successfully ensures the continuous recycling occurrence of "fresh" Cu (II)/Cu (I) and Ce (Ⅳ)/Ce (Ⅲ) pairs at the electrode interface. The "fresh" active sites continue to emerge constantly, resulting in a significant increase in the current signal. In light of the electrochemical characterization, the electron transfer pathway and catalytic cycle mechanism among CeO2, Cu2O and CuO were further discussed. The developed electrochemical immunosensor detected cTnI from 100 fg/mL to 100 ng/mL with a LOD of 15.85 fg/mL under optimal conditions. The analysis results indicate that the immunosensor would hold promise for broad application prospects in the biological detection for other biomarkers.
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Affiliation(s)
- Feng Jiang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Yaoyao Meng
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Mengxiao Mo
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Yueyuan Li
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Qing Liu
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Ping Wang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Yueyun Li
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China.
| | - Qin Wei
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China; Department of Chemistry, Sungkyunkwan University, Suwon 16419, the Republic of Korea.
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2
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D'Agata R, Bellassai N, Spoto G. Exploiting the design of surface plasmon resonance interfaces for better diagnostics: A perspective review. Talanta 2024; 266:125033. [PMID: 37562226 DOI: 10.1016/j.talanta.2023.125033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 08/01/2023] [Accepted: 08/03/2023] [Indexed: 08/12/2023]
Abstract
Surface Plasmon Resonance based-sensors are promising tools for precision diagnostics as they can provide tests useful for early and, whenever possible, non-invasive disease detection and monitoring. The design of novel, robust and effective interfaces enabling the sensing of a variety of molecular interactions in a highly selective and sensitive manner is a necessary step to obtain both accurate and reliable detection by SPR. This review covers the recent research efforts in this area, specifically emphasizing well-designed interfaces and applications in real-life samples. In particular, after a short introduction which identifies some of the critical challenges, the emerging strategies for the integration of the linker, the metal substrate and the recognition element on the sensing interface will be explored and discussed in three sections, as well as the opportunities for building SPR biosensors, easy to use, and with excellent sensitivities. Finally, a summary of some of the more promising and latest diagnostic applications will be provided, presenting a new window into the near-future perspectives.
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Affiliation(s)
- Roberta D'Agata
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria, 6, 95125, Catania, Italy; INBB, Istituto Nazionale di Biostrutture e Biosistemi, Viale Delle Medaglie D'Oro, 305, 00136, Roma, Italy.
| | - Noemi Bellassai
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria, 6, 95125, Catania, Italy; INBB, Istituto Nazionale di Biostrutture e Biosistemi, Viale Delle Medaglie D'Oro, 305, 00136, Roma, Italy
| | - Giuseppe Spoto
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria, 6, 95125, Catania, Italy; INBB, Istituto Nazionale di Biostrutture e Biosistemi, Viale Delle Medaglie D'Oro, 305, 00136, Roma, Italy
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3
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Havens A, El-Shaer E, Garcia L, Godino JL, Thompson RS. Protein Adsorption on Mixed Self-Assembled Monolayers: Influence of Chain Length and Terminal Group. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16712-16720. [PMID: 37960859 DOI: 10.1021/acs.langmuir.3c01250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Mixed self-assembled monolayers (SAMs) are often used as highly tunable substrates for biomedical and biosensing applications. It is well documented, however, that mixed SAMs can be highly disordered at the molecular level and do not pack as closely or homogeneously as single-component SAMs, particularly when the chain lengths and head groups of the SAM thiol components are significantly different. In this study, we explore the impact of SAM structure and mixing ratio (-OH and -CH3 termini) on the weak physisorption behavior of bovine serum albumin (BSA), which adsorbs more readily to hydrophobic, methyl-terminated SAMs. Our results suggest that once the mixture includes 50% or more of the methyl terminus, the mixing ratio alone is a relatively good predictor of adsorption, regardless of the relative chain lengths of the thiols used in the mixture. This trend persists at any mixing ratio for SAMs where methyl- and hydroxyl-terminated groups are the same length or where the hydroxyl-terminated thiol is longer. The only variance observed is at low mixing ratios (<50% methyl-terminated) for a mixed SAM where the methyl-terminated component has a longer chain length. Relative protein adsorption increases on these mixtures, perhaps due to the disordered exposure of the excess alkane backbone. Taken together, however, we do not find significant evidence that varying chain lengths for mixed SAMs prepared on polycrystalline substrates and analyzed in air have an outsized influence on nanoscopic adsorption behavior, despite molecular-level disorder in the SAM itself.
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Affiliation(s)
- Alyssa Havens
- Department of Chemistry, St. Edward's University, 3000 S. Congress Avenue, Austin, Texas 78704, United States
| | - Emily El-Shaer
- Department of Chemistry, St. Edward's University, 3000 S. Congress Avenue, Austin, Texas 78704, United States
| | - Liliana Garcia
- Department of Chemistry, St. Edward's University, 3000 S. Congress Avenue, Austin, Texas 78704, United States
| | - John Luke Godino
- Department of Chemistry, St. Edward's University, 3000 S. Congress Avenue, Austin, Texas 78704, United States
| | - Rebecca S Thompson
- Department of Chemistry, St. Edward's University, 3000 S. Congress Avenue, Austin, Texas 78704, United States
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4
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Robinson C, Juska VB, O'Riordan A. Surface chemistry applications and development of immunosensors using electrochemical impedance spectroscopy: A comprehensive review. ENVIRONMENTAL RESEARCH 2023; 237:116877. [PMID: 37579966 DOI: 10.1016/j.envres.2023.116877] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 08/04/2023] [Accepted: 08/10/2023] [Indexed: 08/16/2023]
Abstract
Immunosensors are promising alternatives as detection platforms for the current gold standards methods. Electrochemical immunosensors have already proven their capability for the sensitive, selective, detection of target biomarkers specific to COVID-19, varying cancers or Alzheimer's disease, etc. Among the electrochemical techniques, electrochemical impedance spectroscopy (EIS) is a highly sensitive technique which examines the impedance of an electrochemical cell over a range of frequencies. There are several important critical requirements for the construction of successful impedimetric immunosensor. The applied surface chemistry and immobilisation protocol have impact on the electroanalytical performance of the developed immunosensors. In this Review, we summarise the building blocks of immunosensors based on EIS, including self-assembly monolayers, nanomaterials, polymers, immobilisation protocols and antibody orientation.
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Affiliation(s)
- Caoimhe Robinson
- Tyndall National Institute, University College Cork, T12 R5CP, Cork, Ireland
| | - Vuslat B Juska
- Tyndall National Institute, University College Cork, T12 R5CP, Cork, Ireland.
| | - Alan O'Riordan
- Tyndall National Institute, University College Cork, T12 R5CP, Cork, Ireland.
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5
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Grabka M, Jasek K, Witkiewicz Z. Surface Acoustic Wave Immunosensor for Detection of Botulinum Neurotoxin. SENSORS (BASEL, SWITZERLAND) 2023; 23:7688. [PMID: 37765744 PMCID: PMC10534944 DOI: 10.3390/s23187688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/03/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023]
Abstract
A Love-type acoustic wave sensor (AT-cut quartz substrate, SiO2 guiding layer) with a center frequency of approximately 120 MHz was used to detect a simulant of pathogenic botulinum neurotoxin type A-recombinant of BoNT-A light chain-in liquid samples. The sensor was prepared by immobilizing monoclonal antibodies specific for botulinum neurotoxin via a thiol monolayer deposited on a gold substrate. Studies have shown that the sensor enables selective analyte detection within a few minutes. In addition, the sensor can be used several times (regeneration of the sensor is possible using a low pH buffer). Nevertheless, the detectability of the analyte is relatively low compared to other analytical techniques that can be used for rapid detection of botulinum neurotoxin. The obtained results confirm the operation of the proposed sensor and give hope for further development of this label-free technique for detecting botulinum neurotoxin.
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Affiliation(s)
- Michał Grabka
- Institute of Chemistry, Faculty of Advanced Technologies and Chemistry, Military University of Technology, 00-908 Warsaw, Poland; (K.J.); (Z.W.)
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A Novel Label-Free Electrochemical Immunosensor Based on a Self-Assembled Monolayer-Modified Electrode for Polychlorinated Biphenyl (PCB) in Environmental Analysis. ELECTROCHEM 2022. [DOI: 10.3390/electrochem3030031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
PCBs (polychlorinated biphenyls) are a very large group of organic compounds that have between two and ten chlorine atoms attached to the biphenyl. These compounds have an acute impact as environmental pollutants, causing cancer and other adverse health effects in humans. It is therefore imperative to develop techniques for the cost-effective detection of PCBs at very low concentrations in ecosystems. In this paper, a novel label-free, indirect, competitive electrochemical immunosensor was first developed with a PCB-BSA conjugate. It is shown herein to compete with free PCBs for binding to the anti-PCB polyclonal primary antibody (IgY). Then, we used a secondary antibody to enhance the sensitivity of the sensor for the detection of PCB in a sample. It has been successfully immobilized on an 11-mercaptoundecanoic acid (11-MUA)-modified gold electrode via a carbodiimide-coupling reaction using cross-linking 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS) on the electrode surface. The immunosensor was investigated by cyclic voltammetry and differential pulse voltammetry in a standard solution of [Fe(CN)6]3−/4−. A linear range of 0.011–220 ng/mL−1 and a limit of detection (LOD) of 0.11 ng/mL−1 for PCBs detection were achieved by the developed immunosensor, showing advantages over conventional assays. The novel label-free electrochemical immunosensor discussed in this paper is a solution for simple, rapid, cost-effective sample screening in a portable, disposable format. The proposed immunosensor has good sensitivity, and it can prove to be an adequate real-time monitoring solution for PCBs in soil samples or other samples.
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7
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Electrochemical Development of an Immunosensor for Detection Polychlorinated biphenyls (PCBs) for Environmental Analysis. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9110307] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Polychlorinated biphenyls (PCBs) are a highly toxic family of synthetic chemical compounds. PCBs are widely spread in the environment and their toxicity can cause serious ailments to living organisms such as cancer; therefore, developing a device for the detection of PCBs in the environment is significant. In this paper, polyclonal primary anti-PCB antibodies were immobilized onto a gold screen-printed electrode with the purpose of creating an electrochemical immunosensor for the detection of Aroclor 1254. It was modified with 11-mercaptoundecanoic acid (11-MUA) and the activation of the carboxylic acid terminal was performed by cross-linking 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hyrodsuccinmide (NHS) on the electrode surface. Cyclic voltammetry, electrochemical impedance spectroscopy (EIS), linear sweep voltammetry, atomic force microscopy (AFM), scanning electron microscopy (SEM), and contact angle measurement were employed to characterize SAM development on the gold electrode. Using a competitive assay, a 0.09 ng/mL−1 limit of detection and a linear range of 0.101–220 ng/mL−1 were determined. The self-assembled monolayers (SAM) were successful in encapsulating the PCBs on the immunosensor. The electrochemical detection showed better resolution when compared to traditional methods such as the ELISA optical technique. The novel electrochemical immunosensor approach that is discussed in this paper has the potential to offer rapid sample screening in a portable, disposable format and could contribute to the effective control and prevention of PCBs in the environment.
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8
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Pardehkhorram R, Alshawawreh F, Gonçales VR, Lee NA, Tilley RD, Gooding JJ. Functionalized Gold Nanorod Probes: A Sophisticated Design of SERS Immunoassay for Biodetection in Complex Media. Anal Chem 2021; 93:12954-12965. [PMID: 34520166 DOI: 10.1021/acs.analchem.1c02557] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Surface-enhanced Raman scattering (SERS) probes offer considerable opportunities in label-based biosensing and analysis. However, achieving specific and reproducible performance, where low detection limits are needed in complex media, remains a challenge. Herein, we present a general strategy employing gold nanorod SERS probes and rationally designed surface chemistry involving protein resistant layers and antibodies to allow for the selective detection of species in complex media. By utilizing the ability of gold nanorods for selective surface modification, Raman reporters (4-mercaptobenzoic acid) were attached to the tips. Importantly, the sides of the nanorods were modified using a mixed layer of two different length stabilizing ligands (carboxyl-terminated oligo ethylene glycols) to ensure colloidal stability, while antibodies were attached to the stabilizing ligands. The nanoparticle interfacial design improves the colloidal stability, unlocks the capability of the probes for targeting biomolecules in complex matrices, and gives the probes the high SERS efficiency. The utility of this probe is demonstrated herein via the detection of Salmonella bacteria at the single bacterium level in complex food matrices using an anti-Salmonella IgG antibody-conjugated probe. The modular nature of the surface chemistry enables the SERS probes to be employed with a molecularly diverse range of biorecognition species (e.g., antibodies and peptides) for many different analytes, thus opening up new opportunities for efficient biosensing applications.
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Affiliation(s)
- Raheleh Pardehkhorram
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Fida'A Alshawawreh
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Vinicius R Gonçales
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - N Alice Lee
- ARC Training Centre for Advanced Technologies in Food Manufacture (ATFM), School of Chemical Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Richard D Tilley
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia.,Electron Microscope Unit, Mark Wainwright Analytical Centre, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - J Justin Gooding
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, New South Wales 2052, Australia
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9
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Bhadra P, Siu SWI. Effect of Concentration, Chain Length, Hydrophobicity, and an External Electric Field on the Growth of Mixed Alkanethiol Self-Assembled Monolayers: A Molecular Dynamics Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:1913-1924. [PMID: 33503375 DOI: 10.1021/acs.langmuir.0c03414] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Growing functionalized self-assembled monolayers (SAMs) with fewer defects and lower cost is the focus of ongoing investigations. In the present study, molecular dynamics simulations were performed to investigate the process of SAM formation on a gold substrate from mixed alkanethiolates in ethanol solution. Using the mixed-SAM system of 11-mercaptoundecanoic acid (MUA) with either 1-decanethiol (C9CH3) or 6-mercaptohexanol (C6OH) in a 3:7 ratio as the standard SAM model, we systematically investigated the effects of the concentration, chain length, functional group, and an external electric field on SAM growth. The results showed that the initial growth rate and surface coverage of the SAM are dependent on the ligand concentration. At a certain high concentration (about 1.2-1.5 times the minimum concentration), the final surface coverage is optimal. Reducing the chain length and increasing the proportion of hydrophobic diluting molecules are effective ways to improve the surface coverage, but the compositional ligands have to be changed, which may not be desirable for the functional requirements of SAMs. Furthermore, by investigating the behavior of the alkanethiolates and ethanol solvent under an applied external field, we find that a strong electric field with a proper field direction can facilitate the generation of defect-free monolayers. These findings will contribute to the understanding of mixed-SAM formation and provide insight into experimental design for efficient and effective SAM formation.
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Affiliation(s)
- Pratiti Bhadra
- Department of Computer and Information Science, University of Macau, Taipa, Macau
| | - Shirley W I Siu
- Department of Computer and Information Science, University of Macau, Taipa, Macau
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10
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Assembling Surface Linker Chemistry with Minimization of Non-Specific Adsorption on Biosensor Materials. MATERIALS 2021; 14:ma14020472. [PMID: 33478142 PMCID: PMC7835736 DOI: 10.3390/ma14020472] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/08/2021] [Accepted: 01/13/2021] [Indexed: 01/04/2023]
Abstract
The operation of biosensors requires surfaces that are both highly specific towards the target analyte and that are minimally subject to fouling by species present in a biological fluid. In this work, we further examined the thiosulfonate-based linker in order to construct robust and durable self-assembling monolayers (SAMs) onto hydroxylated surfaces such as silica. These SAMs are capable of the chemoselective immobilization of thiol-containing probes (for analytes) under aqueous conditions in a single, straightforward, reliable, and coupling-free manner. The efficacy of the method was assessed through implementation as a biosensing interface for an ultra-high frequency acoustic wave device dedicated to the detection of avidin via attached biotin. Fouling was assessed via introduction of interfering bovine serum albumin (BSA), IgG antibody, or goat serum. Improvements were investigated systematically through the incorporation of an oligoethylene glycol backbone employed together with a self-assembling diluent without a functional distal group. This work demonstrates that the incorporation of a diluent of relatively short length is crucial for the reduction of fouling. Included in this work is a comparison of the surface attachment of the linker to Si3N4 and AlN, both materials used in sensor technology.
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11
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Blasi D, Sarcina L, Tricase A, Stefanachi A, Leonetti F, Alberga D, Mangiatordi GF, Manoli K, Scamarcio G, Picca RA, Torsi L. Enhancing the Sensitivity of Biotinylated Surfaces by Tailoring the Design of the Mixed Self-Assembled Monolayer Synthesis. ACS OMEGA 2020; 5:16762-16771. [PMID: 32685844 PMCID: PMC7364725 DOI: 10.1021/acsomega.0c01717] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 06/18/2020] [Indexed: 05/04/2023]
Abstract
Thiolated self-assembled monolayers (SAMs) are typically used to anchor on a gold surface biomolecules serving as recognition elements for biosensor applications. Here, the design and synthesis of N-(2-hydroxyethyl)-3-mercaptopropanamide (NMPA) in biotinylated mixed SAMs is proposed as an alternative strategy with respect to on-site multistep functionalization of SAMs prepared from solutions of commercially available thiols. In this study, the mixed SAM deposited from a 10:1 solution of 3-mercaptopropionic acid (3MPA) and 11-mercaptoundecanoic acid (11MUA) is compared to that resulting from a 10:1 solution of NMPA:11MUA. To this end, surface plasmon resonance (SPR) and attenuated total reflectance infrared (ATR-IR) experiments have been carried out on both mixed SAMs after biotinylation. The study demonstrated how the fine tuning of the SAM features impacts directly on both the biofunctionalization steps, i.e., the biotin anchoring, and the biorecognition properties evaluated upon exposure to streptavidin analyte. Higher affinity for the target analyte with reduced nonspecific binding and lower detection limit has been demonstrated when NMPA is chosen as the more abundant starting thiol. Molecular dynamics simulations complemented the experimental findings providing a molecular rationale behind the performance of the biotinylated mixed SAMs. The present study confirms the importance of the functionalization design for the development of a highly performing biosensor.
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Affiliation(s)
- Davide Blasi
- CSGI,
Unità di Bari, Unità
di Bari, Via Orabona 4, 70125 Bari, Italy
| | - Lucia Sarcina
- Dipartimento
di Chimica, Università degli Studi
di Bari Aldo Moro, Via Orabona 4, 70125 Bari, Italy
| | - Angelo Tricase
- Dipartimento
di Chimica, Università degli Studi
di Bari Aldo Moro, Via Orabona 4, 70125 Bari, Italy
| | - Angela Stefanachi
- Dipartimento
di Farmacia − Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70125 Bari, Italy
| | - Francesco Leonetti
- Dipartimento
di Farmacia − Scienze del Farmaco, Università degli Studi di Bari Aldo Moro, Via Orabona 4, 70125 Bari, Italy
| | | | | | - Kyriaki Manoli
- CSGI,
Unità di Bari, Unità
di Bari, Via Orabona 4, 70125 Bari, Italy
- Dipartimento
di Chimica, Università degli Studi
di Bari Aldo Moro, Via Orabona 4, 70125 Bari, Italy
| | - Gaetano Scamarcio
- Dipartimento
di Fisica “M. Merlin”, Università
degli Studi di Bari Aldo Moro, Via Amendola 173, 70126 Bari, Italy
- IFN
CNR, Sede secondaria di Bari, Via Amendola 173, 70126 Bari, Italy
| | - Rosaria Anna Picca
- CSGI,
Unità di Bari, Unità
di Bari, Via Orabona 4, 70125 Bari, Italy
- Dipartimento
di Chimica, Università degli Studi
di Bari Aldo Moro, Via Orabona 4, 70125 Bari, Italy
| | - Luisa Torsi
- CSGI,
Unità di Bari, Unità
di Bari, Via Orabona 4, 70125 Bari, Italy
- Dipartimento
di Chimica, Università degli Studi
di Bari Aldo Moro, Via Orabona 4, 70125 Bari, Italy
- Physics
and Center for Functional Materials, Faculty of Science and Engineering, Åbo Akademi University, Porthansgatan 3, 20500 Åbo, Finland
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Abstract
Gravimetric transducers produce a signal based on a change in mass. These transducers can be used to construct gas sensors or biosensors using odorant binding proteins (OBPs) as recognition elements for small volatile organic compounds. The methods described in this chapter are based on the immobilization of the OBPs onto functionalized (activated) self-assembled monolayer (SAMs) on gold and on nanocrystalline diamond surfaces. Depending on the surface immobilization methods used to fabricate the biosensor, recombinant proteins can be engineered to express six histidine tags either on the N-terminal or C-terminal of the proteins and these can also be used to facilitate protein immobilization. These methods are used to produce functional sensors based on quartz crystal microbalances or surface acoustic wave devices and are also applicable to other types of gravimetric transducers.
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Affiliation(s)
- Khasim Cali
- Department of Instrumentation and Analytical Science, The University of Manchester, Manchester, United Kingdom
| | | | - Krishna C Persaud
- Department of Instrumentation and Analytical Science, The University of Manchester, Manchester, United Kingdom.
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13
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Camilo DE, Miyazaki CM, Shimizu FM, Ferreira M. Improving direct immunoassay response by layer-by-layer films of gold nanoparticles – Antibody conjugate towards label-free detection. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 102:315-323. [DOI: 10.1016/j.msec.2019.04.055] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/04/2019] [Accepted: 04/18/2019] [Indexed: 01/04/2023]
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14
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Bhadra P, Siu SWI. Refined Empirical Force Field to Model Protein-Self-Assembled Monolayer Interactions Based on AMBER14 and GAFF. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:9622-9633. [PMID: 31246036 DOI: 10.1021/acs.langmuir.9b01367] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Understanding protein interaction with material surfaces is important for the development of nanotechnological devices. The structures and dynamics of proteins can be studied via molecular dynamics (MD) if the protein-surface interactions can be accurately modeled. To answer this question, we computed the adsorption free energies of peptides (representing eleven different amino acids) on a hydrophobic self-assembled monolayer (CH3-SAM) and compared them to the benchmark experimental data set. Our result revealed that existing biomolecular force fields, GAFF and AMBER ff14sb, cannot reproduce the experimental peptide adsorption free energies by Wei and Latour (Langmuir, 2009, 25, 5637-5646). To obtain the improved force fields, we systematically tuned the Lennard-Jones parameters of selected amino acid sidechains and the functional group of SAM with repeated metadynamics and umbrella sampling simulations. The final parameter set has yielded a significant improvement in the free energy values with R = 0.83 and MSE = 0.65 kcal/mol. We applied the refined force field to predict the initial adsorption orientation of lysozyme on CH3-SAM. Two major orientations-face-down and face-up-were predicted. Our analysis on the protein structure, solvent accessible surface area, and binding of native ligand NAG3 suggested that lysozyme in the face-up orientation can remain active after initial adsorption. However, because of its weaker affinity (ΔΔG = 7.86 kcal/mol) for the ligand, the bioactivity of the protein is expected to reduce. Our work facilitates the use of MD for the study of protein-SAM systems. The refined force field compatible with GROMACS is available at https://cbbio.cis.um.edu.mo/software/SAMFF .
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Affiliation(s)
- Pratiti Bhadra
- Department of Computer and Information Science , University of Macau , Avenida da Universidade , Taipa , Macau
| | - Shirley W I Siu
- Department of Computer and Information Science , University of Macau , Avenida da Universidade , Taipa , Macau
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15
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Evtugyn G, Subjakova V, Melikishvili S, Hianik T. Affinity Biosensors for Detection of Mycotoxins in Food. ADVANCES IN FOOD AND NUTRITION RESEARCH 2018; 85:263-310. [PMID: 29860976 DOI: 10.1016/bs.afnr.2018.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This chapter reviews recent achievements in methods of detection of mycotoxins in food. Special focus is on the biosensor technology that utilizes antibodies and nucleic acid aptamers as receptors. Development of biosensors is based on the immobilization of antibodies or aptamers onto various conventional supports like gold layer, but also on nanomaterials such as graphene oxide, carbon nanotubes, and quantum dots that provide an effective platform for achieving high sensitivity of detection using various physical methods, including electrochemical, mass sensitive, and optical. The biosensors developed so far demonstrate high sensitivity typically in subnanomolar limit of detection. Several biosensors have been validated in real samples. The sensitivity of biosensors is similar and, in some cases, even better than traditional analytical methods such as ELISA or chromatography. We believe that future trends will be focused on improving biosensor properties toward practical application in food industry.
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Affiliation(s)
- Gennady Evtugyn
- Analytical Chemistry Department, Chemistry Institute of Kazan Federal University, Kazan, Russian Federation
| | - Veronika Subjakova
- Department of Nuclear Physics and Biophysics, Comenius University, Bratislava, Slovakia
| | - Sopio Melikishvili
- Department of Nuclear Physics and Biophysics, Comenius University, Bratislava, Slovakia
| | - Tibor Hianik
- Department of Nuclear Physics and Biophysics, Comenius University, Bratislava, Slovakia.
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16
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Hui N, Sun X, Niu S, Luo X. PEGylated Polyaniline Nanofibers: Antifouling and Conducting Biomaterial for Electrochemical DNA Sensing. ACS APPLIED MATERIALS & INTERFACES 2017; 9:2914-2923. [PMID: 28026927 DOI: 10.1021/acsami.6b11682] [Citation(s) in RCA: 114] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Biofouling arising from nonspecific adsorption is a substantial outstanding challenge in diagnostics and disease monitoring, and antifouling sensing interfaces capable of reducing the nonspecific adsorption of proteins from biological complex samples are highly desirable. We present herein the preparation of novel composite nanofibers through the grafting of polyethylene glycol (PEG) polymer onto polyaniline (PANI) nanofibers and their application in the development of antifouling electrochemical biosensors. The PEGylated PANI (PANI/PEG) nanofibers possessed large surface area and remained conductive and at the same time demonstrated excellent antifouling performances in single protein solutions as well as complex human serum samples. Sensitive and low fouling electrochemical biosensors for the breast cancer susceptibility gene (BRCA1) can be easily fabricated through the attachment of DNA probes to the PANI/PEG nanofibers. The biosensor showed a very high sensitivity to target BRCA1 with a linear range from 0.01 pM to 1 nM and was also efficient enough to detect DNA mismatches with satisfactory selectivity. Moreover, the DNA biosensor based on the PEGylated PANI nanofibers supported the quantification of BRCA1 in complex human serum, indicating great potential of this novel biomaterial for application in biosensors and bioelectronics.
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Affiliation(s)
- Ni Hui
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology , Qingdao 266042, China
| | - Xiaotian Sun
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology , Qingdao 266042, China
| | - Shuyan Niu
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology , Qingdao 266042, China
| | - Xiliang Luo
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology , Qingdao 266042, China
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17
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Yu ZL, Yang CWT, Triffaux E, Doneux T, Turner RFB, Bizzotto D. Measuring and Remediating Nonspecific Modifications of Gold Surfaces Using a Coupled in Situ Electrochemical Fluorescence Microscopic Methodology. Anal Chem 2016; 89:886-894. [DOI: 10.1021/acs.analchem.6b03953] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Zhinan Landis Yu
- AMPEL,
Department of Chemistry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Cheng Wei Tony Yang
- Michael
Smith Laboratories, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
- Department
of Chemical and Biological Engineering, The University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Eleonore Triffaux
- Chimie
Analytique et Chimie des Interfaces, Faculté des Sciences, Université libre de Bruxelles (ULB), 1050 Bruxelles, Belgium
| | - Thomas Doneux
- Chimie
Analytique et Chimie des Interfaces, Faculté des Sciences, Université libre de Bruxelles (ULB), 1050 Bruxelles, Belgium
| | - Robin F. B. Turner
- Michael
Smith Laboratories, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
- Department
of Electrical and Computer Engineering, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Dan Bizzotto
- AMPEL,
Department of Chemistry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
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18
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Abstract
A molecular dynamic (MD) simulation for investigating the effect of various mixed thiols on the efficiency of immunoglobulin G (IgG) and protein G immobilization was developed.
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Affiliation(s)
- Yong J. Yuan
- Laboratory of Biosensing and MicroMechatronics
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- China
| | - Qiaoying Chen
- Laboratory of Biosensing and MicroMechatronics
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- China
| | - Ji Li
- Laboratory of Biosensing and MicroMechatronics
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- China
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19
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Houplin J, Dablemont C, Sala L, Lafosse A, Amiaud L. Electron Processing at 50 eV of Terphenylthiol Self-Assembled Monolayers: Contributions of Primary and Secondary Electrons. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:13528-34. [PMID: 26606369 DOI: 10.1021/acs.langmuir.5b02109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Aromatic self-assembled monolayers (SAMs) can serve as platforms for development of supramolecular assemblies driven by surface templates. For many applications, electron processing is used to locally reinforce the layer. To achieve better control of the irradiation step, chemical transformations induced by electron impact at 50 eV of terphenylthiol SAMs are studied, with these SAMs serving as model aromatic SAMs. High-resolution electron energy loss spectroscopy (HREELS) and electron-stimulated desorption (ESD) of neutral fragment measurements are combined to investigate electron-induced chemical transformation of the layer. The decrease of the CH stretching HREELS signature is mainly attributed to dehydrogenation, without a noticeable hybridization change of the hydrogenated carbon centers. Its evolution as a function of the irradiation dose gives an estimate of the effective hydrogen content loss cross-section, σ = 2.7-4.7 × 10(-17) cm(2). Electron impact ionization is the major primary mechanism involved, with the impact electronic excitation contributing only marginally. Therefore, special attention is given to the contribution of the low-energy secondary electrons to the induced chemistry. The effective cross-section related to dissociative secondary electron attachment at 6 eV is estimated to be 1 order of magnitude smaller. The 1 eV electrons do not induce significant chemical modification for a 2.5 mC cm(-2) dose, excluding their contribution.
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Affiliation(s)
- Justine Houplin
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France
| | - Céline Dablemont
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France
| | - Leo Sala
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France
| | - Anne Lafosse
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France
| | - Lionel Amiaud
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France
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20
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Peyre J, Humblot V, Méthivier C, Berjeaud JM, Pradier CM. Co-grafting of antiadhesive and antimicrobial agents onto UV-micropatterned copper surfaces. Colloids Surf B Biointerfaces 2015; 136:1120-30. [PMID: 26613864 DOI: 10.1016/j.colsurfb.2015.11.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 10/16/2015] [Accepted: 11/12/2015] [Indexed: 10/22/2022]
Abstract
Adhesion of proteins and bacteria was reduced by a factor close to one order of magnitude, and adhered bacteria were dramatically damaged on copper surfaces by grafting a PEG-modified PMMA-based (polymethyl methacrylate) copolymer together with an antimicrobial peptide. To obtain PEG and a peptide grafted together on the surface, a UV sensitive copolymer (containing PMMA, PEG and a UV sensitive reagent) was primary synthesized and deposited. After selective UV irradiation of this copolymer layer, an antimicrobial peptide, Magainin I, was grafted onto freed-polymer coated-copper surface via a spacer molecule (a mercapto carboxylic acid). The functionalization was characterized at each step by Polarization Modulation Reflection Absorption Infrared Spectroscopy (PM-RAIRS). The antiadhesive properties of the copolymer layer and antibacterial activity of the anchored Magainin I, were individually tested toward adsorption of bovine serum albumin (BSA) proteins, and against Gram positive bacteria, Listeria ivanovii, respectively. The results revealed that adhesion of both proteins and bacteria has been considerably reduced; moreover, the peptide still displays some antimicrobial activity after grafting. This work gives new ideas and perspectives to elaborate complex surface coatings where several agents are needed like for anti-biofilm or sensing applications.
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Affiliation(s)
- Jessie Peyre
- Sorbonne Universités, UPMC Univ. Paris 06, Laboratoire de Réactivité de Surface, 4 place Jussieu, F-75005 Paris, France; CNRS, UMR 7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France
| | - Vincent Humblot
- Sorbonne Universités, UPMC Univ. Paris 06, Laboratoire de Réactivité de Surface, 4 place Jussieu, F-75005 Paris, France; CNRS, UMR 7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France.
| | - Christophe Méthivier
- Sorbonne Universités, UPMC Univ. Paris 06, Laboratoire de Réactivité de Surface, 4 place Jussieu, F-75005 Paris, France; CNRS, UMR 7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France
| | - Jean-Marc Berjeaud
- Ecologie et Biologie des Interactions - UMR CNRS 7267, Université de Poitiers, IBMIG, 40 avenue du recteur Pineau, F-86022, Poitiers, Cedex, France
| | - Claire-Marie Pradier
- Sorbonne Universités, UPMC Univ. Paris 06, Laboratoire de Réactivité de Surface, 4 place Jussieu, F-75005 Paris, France; CNRS, UMR 7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France
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21
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Santos A, Carvalho FC, Roque-Barreira MC, Zorzetto-Fernandes AL, Gimenez-Romero D, Monzó I, Bueno PR. Evidence for Conformational Mechanism on the Binding of TgMIC4 with β-Galactose-Containing Carbohydrate Ligand. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:12111-12119. [PMID: 26488670 DOI: 10.1021/acs.langmuir.5b03141] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A deeper understanding of the role of sialic/desialylated groups during TgMIC4-glycoproteins interactions has importance to better clarify the odd process of host cell invasion by members of the apicomplexan phylum. Within this context, we evaluated the interaction established by recombinant TgMIC4 (the whole molecule) with sialylated (bovine fetuin) and desialylated (asialofetuin) glycoproteins by using functionalized quartz crystal microbalance with dissipation monitoring (QCM-D). A suitable receptive surface containing recombinant TgMIC4 for monitoring β-galactose-containing carbohydrate ligand (limit of quantification ∼ 40 μM) was designed and used as biomolecular recognition platform to study the binding and conformational mechanisms of TgMIC4 during the interaction with glycoprotein containing (fetuin), or not, terminal sialic group (asialofetuin). It was inferred that the binding/interaction monitoring depends on the presence/absence of sialic groups in target protein and is possible to be differentiated through a slower binding kinetic step using QCM-D approach (which we are inferring to be thus associated with β-galactose ligand). This slower binding/interaction step is likely supposed (from mechanical energetic analysis obtained in QCM-D measurements) to be involved with Toxoplasma gondii (the causative agent of toxoplasmosis) parasitic invasion accompanied by ligand (galactose) induced binding conformational change (i.e., cell internalization process can be additionally dependent on structural conformational changes, controlled by the absence of sialic groups and to the specific binding with galactose), in addition to TgMIC4-glycoprotein solely recognition binding process.
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Affiliation(s)
- Adriano Santos
- Institute of Chemistry, Physical Chemistry Department, Nanobionics Laboratory, Universidade Estadual Paulista (São Paulo State University) , CP 355, 14800-060 Araraquara, São Paulo, Brazil
| | - Fernanda C Carvalho
- Institute of Chemistry, Physical Chemistry Department, Nanobionics Laboratory, Universidade Estadual Paulista (São Paulo State University) , CP 355, 14800-060 Araraquara, São Paulo, Brazil
| | - Maria-Cristina Roque-Barreira
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP) , Av. dos Bandeirantes, 3900, Ribeirão Preto, 14049-900 São Paulo, Brazil
| | - André Luiz Zorzetto-Fernandes
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP) , Av. dos Bandeirantes, 3900, Ribeirão Preto, 14049-900 São Paulo, Brazil
| | - David Gimenez-Romero
- Departamento de Química Física, Facultad de Química, Universitat de València , Avda. Dr. Moliner 50, 46100 Burjassot, Valencia, Spain
| | - Isidro Monzó
- Departamento de Química Física, Facultad de Química, Universitat de València , Avda. Dr. Moliner 50, 46100 Burjassot, Valencia, Spain
| | - Paulo R Bueno
- Institute of Chemistry, Physical Chemistry Department, Nanobionics Laboratory, Universidade Estadual Paulista (São Paulo State University) , CP 355, 14800-060 Araraquara, São Paulo, Brazil
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22
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Booth MA, Kannappan K, Hosseini A, Partridge A. In-Depth Electrochemical Investigation of Surface Attachment Chemistry via Carbodiimide Coupling. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8033-41. [PMID: 26107592 DOI: 10.1021/acs.langmuir.5b01863] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Aminoferrocene is used as an electroactive indicator to investigate carbodiimide coupling reactions on a carboxylic acid-functionalized self-assembled monolayer. The commonly used attachment chemistry with 1-ethyl-3-(3-(dimethylamino)propyl)carbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) is used for surface activation. A number of conditions are investigated, including EDC and NHS concentration, buffer solutions, incubation timing, and aminoferrocene concentration. Ferrocene is a well-documented electroactive species, and the number of surface-bound ferrocene species can be calculated using electrochemical methods. This capability allows determination of optimal conditions, as well as providing a method for comparing and investigating novel carboxylated surfaces. An EDC-mediated procedure with ∼5 mM EDC and NHS (1:1) made in water, with a full acid monolayer, with 250 μM aminoferrocene for 40 min was found to give the highest ferrocene attachment. An application of this is demonstrated for preparing a probe-DNA-coated surface for DNA sensing. By backfilling with aminoferrocene, a differential quantification of the amount of probe DNA available for sensing can be obtained. This provides an elegant method to monitor an important aspect, namely, probe surface characterization, which will be highly useful for biosensing purposes.
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Affiliation(s)
- Marsilea Adela Booth
- †Digital Sensing Limited, 16 Beatrice Tinsley Crescent, Albany, Auckland 0632, New Zealand
| | - Karthik Kannappan
- †Digital Sensing Limited, 16 Beatrice Tinsley Crescent, Albany, Auckland 0632, New Zealand
| | - Ali Hosseini
- †Digital Sensing Limited, 16 Beatrice Tinsley Crescent, Albany, Auckland 0632, New Zealand
- ‡Department of Chemical and Materials Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Ashton Partridge
- †Digital Sensing Limited, 16 Beatrice Tinsley Crescent, Albany, Auckland 0632, New Zealand
- ‡Department of Chemical and Materials Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand
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23
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Wang J. Self-propelled affinity biosensors: Moving the receptor around the sample. Biosens Bioelectron 2015; 76:234-42. [PMID: 26074332 DOI: 10.1016/j.bios.2015.04.095] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 04/25/2015] [Accepted: 04/27/2015] [Indexed: 12/31/2022]
Abstract
Self-propelled nanomotors offer considerable promise for developing novel biosensing protocols involving 'on-the-fly' recognition events. This article reviews recent advances in using catalytic nanomotors for bioaffinity sensing and for isolating target biomolecules and cells from complex biological samples. A variety of receptors, attached to self-propelled nanoscale motors, can thus move around the sample and, along with the generated microbubbles, lead to greatly enhanced fluid transport and accelerated recognition process. Such operation addresses the challenges imposed by the slow analyte transport in designing sensitive bioaffinity assays. The recognition element can be attached onto the motor surface or embedded in the motor material itself. Receptor-functionalized nanomotors based on different biomolecular interactions have thus been shown extremely useful for rapid target isolation from complex biological samples without preparatory and washing steps. Tubular microengine microtransporters, functionalized with antibody, ss-DNA, aptamer or lectin receptors, are particularly useful for direct detection and isolation of proteins, nucleic acids, proteins or cancer cells. Micromotors with 'built-in' recognition, exploiting the selective binding properties of the outer layer of such micronegines, can also be used. Greatly enhanced analyte-receptor interactions can also be achieved through the increased fluid transport associated with the movement of unmodified micromotors. The attractive features of the new motion-based bioaffinity sensing and separation protocols open up new opportunities for diverse biomedical, environmental and security applications.
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Affiliation(s)
- J Wang
- Department of Nanoengineering, University of California San Diego, San Diego, CA 92903, USA.
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24
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Gharbi A, Legigan T, Humblot V, Papot S, Berjeaud JM. Surface functionalization by covalent immobilization of an innovative carvacrol derivative to avoid fungal biofilm formation. AMB Express 2015; 5:9. [PMID: 25852986 PMCID: PMC4384722 DOI: 10.1186/s13568-014-0091-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Accepted: 12/23/2014] [Indexed: 11/17/2022] Open
Abstract
Carvacrol, an aromatic terpenic compound, known to be antimicrobial was grafted onto gold surfaces via two strategies based on newly-synthesized cross-linkers involving either an ester bond which can be cleaved by microbial esterases, or a covalent ether link. Surface functionalizations were characterized at each step by reflection absorption infrared spectroscopy (RAIRS). The two functionalized gold samples both led to a loss of culturability of the yeast Candida albicans, higher than 65%, indicating that the activity of the freshly-designed surfaces was probably due to still covalently immobilized carvacrol. On the contrary, when a phenyl group replaced the terpenic moiety, the yeast culturability increased by about 30%, highlighting the specific activity of carvacrol grafted on the surfaces. Confocal microscopy analyses showed that the mode of action of the functionalized surfaces with the ester or the ether of carvacrol was, in both cases, fungicidal and not anti-adhesive. Finally, this study shows that covalently immobilization of terpenic compounds can be used to design promising antimicrobial surfaces.
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25
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Bedford EE, Boujday S, Pradier CM, Gu FX. Nanostructured and spiky gold in biomolecule detection: improving binding efficiencies and enhancing optical signals. RSC Adv 2015. [DOI: 10.1039/c4ra13544j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Nanostructured gold can improve the ability to detect biomolecules.
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Affiliation(s)
- E. E. Bedford
- Sorbonne Universités
- UPMC University Paris 6
- UMR CNRS 7197
- Laboratoire de Réactivité de Surface
- F75005 Paris
| | - S. Boujday
- Sorbonne Universités
- UPMC University Paris 6
- UMR CNRS 7197
- Laboratoire de Réactivité de Surface
- F75005 Paris
| | - C.-M. Pradier
- Sorbonne Universités
- UPMC University Paris 6
- UMR CNRS 7197
- Laboratoire de Réactivité de Surface
- F75005 Paris
| | - F. X. Gu
- Department of Chemical Engineering
- University of Waterloo
- Waterloo
- Canada
- Waterloo Institute for Nanotechnology
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26
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Cho H, Zook J, Banner T, Park SH, Min BH, Hasty KA, Pinkhassik E, Lindner E. Immobilization of fibrinogen antibody on self-assembled gold monolayers for immunosensor applications. Tissue Eng Regen Med 2014. [DOI: 10.1007/s13770-013-1119-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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27
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Etayash H, Norman L, Thundat T, Stiles M, Kaur K. Surface-conjugated antimicrobial peptide leucocin a displays high binding to pathogenic gram-positive bacteria. ACS APPLIED MATERIALS & INTERFACES 2014; 6:1131-1138. [PMID: 24359454 DOI: 10.1021/am404729c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Leucocin A, a representative class IIa bacteriocin, is a ribosomally synthesized antimicrobial peptide (AMP) that displays potent activity against specific gram-positive bacteria. The antibacterial activity of such peptides is preceded by the binding event that can be utilized for studying specific peptide-bacteria interactions. In this study, 37-residue Leucocin A (LeuA) was synthesized using solid-phase peptide synthesis and covalently immobilized on gold substrates from either the N- or C-terminal. Both the peptide monolayers on gold substrates were incubated separately with five strains of gram-positive bacteria and displayed differential binding to different strains with highest binding to pathogenic Listeria monocytogenes . The C-terminally immobilized LeuA showed higher bacterial binding compared to the N-terminally attached LeuA. The full length immobilized LeuA (37-residue) was active as well as displayed higher bacterial binding (73 ± 6 bacteria/100 μm(2)) compared to 24-residue inactive LeuA fragment (40 ± 8 bacteria/100 μm(2)) from the C-terminal region. The high and specific bacterial binding ability of LeuA functionalized surfaces support the potential use of class IIa bacteriocins in antimicrobial peptide-based diagnostic platforms.
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Affiliation(s)
- Hashem Etayash
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta , Edmonton, Alberta T6G 2E1, Canada
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28
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Amiaud L, Houplin J, Bourdier M, Humblot V, Azria R, Pradier CM, Lafosse A. Low-energy electron induced resonant loss of aromaticity: consequences on cross-linking in terphenylthiol SAMs. Phys Chem Chem Phys 2014; 16:1050-9. [DOI: 10.1039/c3cp53023j] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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29
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Hromadová M, Pospíšil L, Sokolová R, Bulíčková J, Hof M, Fischer-Durand N, Salmain M. Atrazine-based self-assembled monolayers and their interaction with anti-atrazine antibody: building of an immunosensor. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:16084-16092. [PMID: 24313270 DOI: 10.1021/la404029j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
As a part of our objective to build an immunosensor for the detection of the pesticide atrazine (ATZ) in environmental samples, we studied the self-assembling process of the disulfide derivative of the pesticide atrazine on a gold substrate. Atrazine-based self-assembled monolayers were characterized by ellipsometry, scanning tunneling microscopy, polarization-modulation infrared reflection-absorption spectroscopy (PM IRRAS), X-ray photoelectron spectroscopy and quartz crystal microbalance (QCM) measurements. Two different time constants for the adsorption process were observed, depending on the experimental method used. The QCM data reflect adsorption kinetics of the original disulfide compound, whereas ellipsometry and ex situ PM IRRAS refer to the formation of thiolate (ATZS) monolayers. In situ QCM data demonstrated the suitability of such monolayers for the detection of atrazine in aqueous samples. Exposure of the ATZS sensing surface to an anti-atrazine antibody (anti-ATZ IgG) resulted in complete coverage of the surface by antibody, whereas approximately half of the antibody molecules were displaced from the QCM sensor surface by further addition of atrazine into the solution.
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Affiliation(s)
- Magdaléna Hromadová
- J. Heyrovský Institute of Physical Chemistry of ASCR , v.v.i., Dolejškova 3, 182 23 Prague, Czech Republic
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30
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Design and evaluation of mixed self-assembled monolayers for a potential use in everolimus eluting coronary stents. Colloids Surf B Biointerfaces 2013; 112:330-6. [DOI: 10.1016/j.colsurfb.2013.07.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 07/20/2013] [Accepted: 07/30/2013] [Indexed: 02/02/2023]
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31
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Influence of a Thiolate Chemical Layer on GaAs (100) Biofunctionalization: An Original Approach Coupling Atomic Force Microscopy and Mass Spectrometry Methods. MATERIALS 2013; 6:4946-4966. [PMID: 28788369 PMCID: PMC5452766 DOI: 10.3390/ma6114946] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 08/29/2013] [Accepted: 10/18/2013] [Indexed: 11/17/2022]
Abstract
Widely used in microelectronics and optoelectronics; Gallium Arsenide (GaAs) is a III-V crystal with several interesting properties for microsystem and biosensor applications. Among these; its piezoelectric properties and the ability to directly biofunctionalize the bare surface, offer an opportunity to combine a highly sensitive transducer with a specific bio-interface; which are the two essential parts of a biosensor. To optimize the biorecognition part; it is necessary to control protein coverage and the binding affinity of the protein layer on the GaAs surface. In this paper; we investigate the potential of a specific chemical interface composed of thiolate molecules with different chain lengths; possessing hydroxyl (MUDO; for 11-mercapto-1-undecanol (HS(CH₂)11OH)) or carboxyl (MHDA; for mercaptohexadecanoic acid (HS(CH₂)15CO₂H)) end groups; to reconstitute a dense and homogeneous albumin (Rat Serum Albumin; RSA) protein layer on the GaAs (100) surface. The protein monolayer formation and the covalent binding existing between RSA proteins and carboxyl end groups were characterized by atomic force microscopy (AFM) analysis. Characterization in terms of topography; protein layer thickness and stability lead us to propose the 10% MHDA/MUDO interface as the optimal chemical layer to efficiently graft proteins. This analysis was coupled with insitu MALDI-TOF mass spectrometry measurements; which proved the presence of a dense and uniform grafted protein layer on the 10% MHDA/MUDO interface. We show in this study that a critical number of carboxylic docking sites (10%) is required to obtain homogeneous and dense protein coverage on GaAs. Such a protein bio-interface is of fundamental importance to ensure a highly specific and sensitive biosensor.
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Montrose A, Cargou S, Nepveu F, Manczak R, Gué AM, Reybier K. Impedimetric immunosensor for the detection of circulating pro-inflammatory monocytes as infection markers. Biosens Bioelectron 2013; 49:305-11. [PMID: 23792623 DOI: 10.1016/j.bios.2013.05.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 05/14/2013] [Accepted: 05/20/2013] [Indexed: 10/26/2022]
Abstract
Circulating blood monocytes belong to the first line of defense against pathogens and inflammation. Monocytes can be divided into three populations defined by the expression of the cell surface molecules, CD 14 and CD 16. The CD 14(++) CD 16(-) cells, called "classical" monocytes, represent 85% to 95% of the total monocytes in a healthy person whereas CD 14(-) CD 16(+), called "proinflammatory" monocytes, are found in greater numbers in the blood of patients with acute inflammation and infectious diseases. This increase in the concentration of proinflammatory monocytes can be a good indicator of an infectious state. This study presents an immunosensor based on impedance detection for specific cell trapping of classical and proinflammatory monocytes. The grafting of specific antibodies (CD 14 or CD 16) was based on the use of mixed SAM associated with protein G. Each step of the functionalization was characterized by electrochemical methods, quartz crystal microbalance and atomic force microscopy. Faradaic electrochemical impedance spectroscopy and voltametric analysis confirmed the success of the modification process with a surface coverage reaching 92% for the antibody layer. The increase in the deposited mass at each step of the modification process confirmed this results revealing that one protein G in two was bound to an antibody. The cell trapping capacity, evaluated by the variation in the film resistance using non-faradaic impedance spectroscopy revealed that the cell trapping is selective, depending on the specific antibody grafted and quantitative with the range of detection being 1000 to 30,000 infected cells. This range of detection is consistent with the application targeted.
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Affiliation(s)
- Armelle Montrose
- Université de Toulouse; UPS; UMR 152 Pharma-Dev; Université Toulouse 3, Faculté des Sciences Pharmaceutiques, F-31062 Toulouse cedex 09, France
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de Juan-Franco E, Rodríguez-Frade JM, Mellado M, Lechuga LM. Implementation of a SPR immunosensor for the simultaneous detection of the 22K and 20K hGH isoforms in human serum samples. Talanta 2013; 114:268-75. [PMID: 23953470 DOI: 10.1016/j.talanta.2013.04.042] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 04/10/2013] [Accepted: 04/21/2013] [Indexed: 10/26/2022]
Abstract
We have implemented a Surface Plasmon Resonance (SPR) immunosensor based on a sandwich assay for the simultaneous detection of the two main hGH isoforms, of 22 kDa (22K) and 20 kDa (20K). An oriented-antibody sensor surface specific for both hormone isoforms was assembled by using the biotin-streptavidin system. The immunosensor functionality was checked for the direct detection of the 22K hGH isoform in buffer, which gave high specificity and reproducibility (intra and inter-assay mean coefficients of variation of 8.23% and 9% respectively). The selective determination of the 22K and 20K hGH isoforms in human serum samples in a single assay was possible by using two specific anti-hGH monoclonal antibodies. The detection limit for both hormone isoforms was 0.9 ng mL(-1) and the mean coefficient of variation was below 7.2%. The excellent reproducibility and sensitivity obtained indicate the high performance of this immunosensor for implementing an anti-doping test.
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Affiliation(s)
- Elena de Juan-Franco
- Nanobiosensors and Bioanalytical Applications Group, Research Center on Nanoscience and Nanotechnology (CSIC) and CIBER-BBN, 08193 Bellaterra, Barcelona, Spain.
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Aouani H, Šípová H, Rahmani M, Navarro-Cia M, Hegnerová K, Homola J, Hong M, Maier SA. Ultrasensitive broadband probing of molecular vibrational modes with multifrequency optical antennas. ACS NANO 2013. [PMID: 23199257 DOI: 10.1021/nn304860t] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Optical antennas represent an enabling technology for enhancing the detection of molecular vibrational signatures at low concentrations and probing the chemical composition of a sample in order to identify target molecules. However, efficiently detecting different vibrational modes to determine the presence (or the absence) of a molecular species requires a multispectral interrogation in a window of several micrometers, as many molecules present informative fingerprint spectra in the mid-infrared between 2.5 and 10 μm. As most nanoantennas exhibit a narrow-band response because of their dipolar nature, they are not suitable for such applications. Here, we propose the use of multifrequency optical antennas designed for operating with a bandwidth of several octaves. We demonstrate that surface-enhanced infrared absorption gains in the order of 10(5) can be easily obtained in a spectral window of 3 μm with attomolar concentrations of molecules, providing new opportunities for ultrasensitive broadband detection of molecular species via vibrational spectroscopy techniques.
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Affiliation(s)
- Heykel Aouani
- The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom.
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QCM immunoassay for recombinant cysteine peptidase: A potential protein biomarker for diagnosis of citrus canker. Talanta 2013; 104:193-7. [DOI: 10.1016/j.talanta.2012.11.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 11/01/2012] [Accepted: 11/03/2012] [Indexed: 11/15/2022]
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Scholten A, Menges B, Juebner M, Rothschild MA, Bender K. A mixed alkanethiol based immunosensor for surface plasmon field-enhanced fluorescence spectroscopy in serum. Analyst 2013; 138:1705-12. [DOI: 10.1039/c3an35657d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Immobilization of proteins on carboxylic acid functionalized nanopatterns. Anal Bioanal Chem 2012; 405:1985-93. [PMID: 23239182 DOI: 10.1007/s00216-012-6621-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 11/28/2012] [Accepted: 11/29/2012] [Indexed: 01/13/2023]
Abstract
The immobilization of proteins on nanopatterned surfaces was investigated using in situ atomic force microscopy (AFM) and ex situ infrared reflectance-absorption spectroscopy (IRAS). The AFM-based lithography technique of nanografting provided control of the size, geometry, and spatial placement of nanopatterns within self-assembled monolayers (SAMs). Square nanopatterns of carboxylate-terminated SAMs were inscribed within methyl-terminated octadecanethiolate SAMs and activated using carbodiimide/succinimide coupling chemistry. Staphylococcal protein A was immobilized on the activated nanopatterns before exposure to rabbit immunoglobulin G. In situ AFM was used to monitor changes in the topography and friction of the nanopatterns in solution upon protein immobilization. Complementary studies with ex situ IRAS confirmed the surface chemistry that occurred during the steps of SAM activation and subsequent protein immobilization on unpatterned samples. Since carbodiimide/succinimide coupling chemistry can be used for surface attachment of different biomolecules, this protocol shows promise for development of other aqueous-based studies for nanopatterned protein immobilization.
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Gamella M, Campuzano S, Conzuelo F, Reviejo AJ, Pingarrón JM. Amperometric Magnetoimmunosensors for Direct Determination of D-Dimer in Human Serum. ELECTROANAL 2012. [DOI: 10.1002/elan.201200503] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Gharbi A, Humblot V, Turpin F, Pradier CM, Imbert C, Berjeaud JM. Elaboration of antibiofilm surfaces functionalized with antifungal-cyclodextrin inclusion complexes. ACTA ACUST UNITED AC 2012; 65:257-69. [PMID: 22268719 DOI: 10.1111/j.1574-695x.2012.00932.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Revised: 01/04/2012] [Accepted: 01/19/2012] [Indexed: 11/26/2022]
Abstract
To tackle the loss of activity of surfaces functionalized by coating and covalently bound molecules to materials, an intermediate system implying the noncovalent immobilization of active molecules in the inner cavity of grafted cyclodextrins (CDs) was investigated. The antifungal and antibiofilm activities of the most stable complexes of Anidulafungin (ANF; echinocandin) and thymol (THY; terpen) in various CDs were demonstrated to be almost the same as the free molecules. The selected CD was covalently bond to self-assembled monolayers on gold surfaces. The immobilized antifungal agents reduced the number of culturable Candida albicans ATCC 3153 attached to the surface by 64 ± 8% for ANF and 75 ± 15% for THY. The inhibitory activity was persistent for THY-loaded samples, whereas it was completely lost for ANF-loaded surfaces after one use. However, reloading of the echinocandin restored the activity. Using fluorescent dying and confocal microscopy, it was proposed that the ANF-loaded surfaces inhibited the adherence of the yeasts, whereas the activity of immobilized THY was found fungicidal. This kind of tailored approach for functionalizing surfaces that could allow a progressive release of ANF or THY gave promising results but still needs to be improved to display a full activity.
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Affiliation(s)
- Aïcha Gharbi
- Laboratoire de Chimie et Microbiologie de l'Eau-UMR 6008 CNRS, UFR Sciences fondamentales et Appliquées, IBMIG, Université de Poitiers, Poitiers Cedex, France
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Harvey J, Bergdahl A, Dadafarin H, Ling L, Davis EC, Omanovic S. An electrochemical method for functionalization of a 316L stainless steel surface being used as a stent in coronary surgery: irreversible immobilization of fibronectin for the enhancement of endothelial cell attachment. Biotechnol Lett 2012; 34:1159-65. [DOI: 10.1007/s10529-012-0885-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 02/15/2012] [Indexed: 12/01/2022]
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Orozco J, Jiménez-Jorquera C, Fernández-Sánchez C. Electrochemical Performance of Self-Assembled Monolayer Gold Nanoparticle-Modified Ultramicroelectrode Array Architectures. ELECTROANAL 2012. [DOI: 10.1002/elan.201100599] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Campuzano S, Orozco J, Kagan D, Guix M, Gao W, Sattayasamitsathit S, Claussen JC, Merkoçi A, Wang J. Bacterial isolation by lectin-modified microengines. NANO LETTERS 2012; 12:396-401. [PMID: 22136558 PMCID: PMC3256279 DOI: 10.1021/nl203717q] [Citation(s) in RCA: 227] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
New template-based self-propelled gold/nickel/polyaniline/platinum (Au/Ni/PANI/Pt) microtubular engines, functionalized with the Concanavalin A (ConA) lectin bioreceptor, are shown to be extremely useful for the rapid, real-time isolation of Escherichia coli (E. coli) bacteria from fuel-enhanced environmental, food, and clinical samples. These multifunctional microtube engines combine the selective capture of E. coli with the uptake of polymeric drug-carrier particles to provide an attractive motion-based theranostics strategy. Triggered release of the captured bacteria is demonstrated by movement through a low-pH glycine-based dissociation solution. The smaller size of the new polymer-metal microengines offers convenient, direct, and label-free optical visualization of the captured bacteria and discrimination against nontarget cells.
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Affiliation(s)
- Susana Campuzano
- Department of Nanoengineering, University of California-San Diego, La Jolla, CA 92093, USA
- Department of Analytical Chemistry, Complutense University of Madrid, E-28040 Madrid, Spain
| | - Jahir Orozco
- Department of Nanoengineering, University of California-San Diego, La Jolla, CA 92093, USA
| | - Daniel Kagan
- Department of Nanoengineering, University of California-San Diego, La Jolla, CA 92093, USA
| | - Maria Guix
- Department of Nanoengineering, University of California-San Diego, La Jolla, CA 92093, USA
- ICREA & Nanobioelectronics & Biosensors Group, Catalan Institute of Nanotechnology, CIN2 (ICN-CSIC), Bellaterra, E-08193 Barcelona, Spain
| | - Wei Gao
- Department of Nanoengineering, University of California-San Diego, La Jolla, CA 92093, USA
| | | | - Jonathan C. Claussen
- Department of Nanoengineering, University of California-San Diego, La Jolla, CA 92093, USA
| | - Arben Merkoçi
- ICREA & Nanobioelectronics & Biosensors Group, Catalan Institute of Nanotechnology, CIN2 (ICN-CSIC), Bellaterra, E-08193 Barcelona, Spain
| | - Joseph Wang
- Department of Nanoengineering, University of California-San Diego, La Jolla, CA 92093, USA
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Bryan T, Luo X, Forsgren L, Morozova-Roche LA, Davis JJ. The robust electrochemical detection of a Parkinson's disease marker in whole blood sera. Chem Sci 2012. [DOI: 10.1039/c2sc21221h] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Sharma M, Rao V, Merwyn S, Agarwal G, Upadhyay S, Vijayaraghavan R. A novel piezoelectric immunosensor for the detection of malarial Plasmodium falciparum histidine rich protein-2 antigen. Talanta 2011; 85:1812-7. [DOI: 10.1016/j.talanta.2011.07.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 07/04/2011] [Accepted: 07/06/2011] [Indexed: 11/26/2022]
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Jarocka U, Wąsowicz M, Radecka H, Malinowski T, Michalczuk L, Radecki J. Impedimetric Immunosensor for Detection of Plum Pox Virus in Plant Extracts. ELECTROANAL 2011. [DOI: 10.1002/elan.201100152] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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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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Campuzano S, Kagan D, Orozco J, Wang J. Motion-driven sensing and biosensing using electrochemically propelled nanomotors. Analyst 2011; 136:4621-30. [DOI: 10.1039/c1an15599g] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Sciacca B, Secret E, Pace S, Gonzalez P, Geobaldo F, Quignard F, Cunin F. Chitosan-functionalized porous silicon optical transducer for the detection ofcarboxylic acid-containing drugs in water. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02904a] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Thébault P, Boujday S, Sénéchal H, Pradier CM. Investigation of an Allergen Adsorption on Amine- and Acid-Terminated Thiol Layers: Influence on Their Affinity to Specific Antibodies. J Phys Chem B 2010; 114:10612-9. [DOI: 10.1021/jp103164b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pascal Thébault
- UPMC Univ. Paris 6, UMR 7197, Laboratoire de Réactivité de Surface, 4 Place Jussieu, F75005 Paris, France, CNRS, UMR 7197, Laboratoire de Réactivité de Surface, 4 Place Jussieu, 75005 Paris, France, UMR CNRS/ESPCI Paritech 7195, 10 rue Vauquelin F75005 Paris, France, and INSERM, 101 rue de Tolbiac, 75013 Paris, France
| | - Souhir Boujday
- UPMC Univ. Paris 6, UMR 7197, Laboratoire de Réactivité de Surface, 4 Place Jussieu, F75005 Paris, France, CNRS, UMR 7197, Laboratoire de Réactivité de Surface, 4 Place Jussieu, 75005 Paris, France, UMR CNRS/ESPCI Paritech 7195, 10 rue Vauquelin F75005 Paris, France, and INSERM, 101 rue de Tolbiac, 75013 Paris, France
| | - Hélène Sénéchal
- UPMC Univ. Paris 6, UMR 7197, Laboratoire de Réactivité de Surface, 4 Place Jussieu, F75005 Paris, France, CNRS, UMR 7197, Laboratoire de Réactivité de Surface, 4 Place Jussieu, 75005 Paris, France, UMR CNRS/ESPCI Paritech 7195, 10 rue Vauquelin F75005 Paris, France, and INSERM, 101 rue de Tolbiac, 75013 Paris, France
| | - Claire-Marie Pradier
- UPMC Univ. Paris 6, UMR 7197, Laboratoire de Réactivité de Surface, 4 Place Jussieu, F75005 Paris, France, CNRS, UMR 7197, Laboratoire de Réactivité de Surface, 4 Place Jussieu, 75005 Paris, France, UMR CNRS/ESPCI Paritech 7195, 10 rue Vauquelin F75005 Paris, France, and INSERM, 101 rue de Tolbiac, 75013 Paris, France
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Bittoun E, Marmur A, Ostblom M, Ederth T, Liedberg B. Filled nanoporous surfaces: controlled formation and wettability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:12374-12379. [PMID: 19697917 DOI: 10.1021/la9016992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The controlled filling of hydrophobic nanoporous surfaces with hydrophilic molecules and their wetting properties are described and demonstrated by using thiocholesterol (TC) self-assembled monolayers (SAMs) on gold and mercaptoundecanoic acid (MUA) as the filling agent. A novel procedure was developed for filling the nanopores in the TC SAMs by immersing them into a "cocktail" solution of TC and MUA, with TC in huge excess. This procedure results in an increasing coverage of MUA with increasing immersion time up to an area fraction of approximately 23%, while the amount of TC remains almost constant. Our findings strongly support earlier observations where linear omega-substituted alkanethiols selectively fill defects (nanopores) in the TC SAM (Yang et al. Langmuir 1997, 12, 1704-1707). They also support the formation of a homogeneously mixed SAM, given by the distribution of TC on the gold surface, rather than of a phase-segregated overlayer structure with domains of varying size, shape, and composition. The wetting properties of the filled SAMs were investigated by measuring the most stable contact angle as well as contact angle hysteresis. It is shown that the most stable contact angle is very well described by the Cassie equation, since the drops are much larger than the scale of chemical heterogeneity of the SAM surfaces. In addition, it is demonstrated that contact angle hysteresis is sensitive to the chemical heterogeneity of the surface, even at the nanometric scale.
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Affiliation(s)
- Eyal Bittoun
- Department of Chemical Engineering, Technion- Israel Institute of Technology, 32000 Haifa, Israel
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