1
|
Coletta G, Amendola V. Numerical Modelling of the Optical Properties of Plasmonic and Latex Nanoparticles to Improve the Detection Limit of Immuno-Turbidimetric Assays. NANOMATERIALS 2021; 11:nano11051147. [PMID: 33924972 PMCID: PMC8145499 DOI: 10.3390/nano11051147] [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: 04/02/2021] [Revised: 04/24/2021] [Accepted: 04/26/2021] [Indexed: 12/25/2022]
Abstract
Turbidimetric assays with latex nanoparticles are widely applied for the detection of biological analytes, because of their rapidity, low cost, reproducibility, and automatization. However, the detection limit can be lowered only at the price of a reduced dynamic range, due to the rapid saturation of the light scattering signal at high analyte concentration. Here, we use numerical calculations to investigate the possibility of increasing the performance of immuno-turbidimetric assays without compromising the measurement dynamic range, by combining plasmonic (gold, silver) and latex nanoparticles. Our modelling results show that plasmonic nanoparticles are compatible with a large signal change even when small aggregates are formed, i.e., at low analyte concentration. The working principle relies on the remarkable modification of the surface plasmon band when noble metal nanoparticles form oligomers, and also when latex particles are included in the aggregate. At high analyte concentration, when larger aggregates form, the latex particles can provide the required linear response of standard immuno-turbidimetric assays. Thus, the combination of the two components can be a successful strategy to improve the detection limit and the dynamic range, while maintaining all the advantages of the homogeneous immuno-turbidimetric assays.
Collapse
|
2
|
Wu D, Voldman J. An integrated model for bead-based immunoassays. Biosens Bioelectron 2020; 154:112070. [PMID: 32056966 DOI: 10.1016/j.bios.2020.112070] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/30/2020] [Accepted: 02/01/2020] [Indexed: 11/16/2022]
Abstract
Bead-based immunoassays have shown great promise for rapid and sensitive protein quantification. However, there still lacks holistic understanding of assay performance that can inform assay design and optimization. In this paper, we present an integrated mathematical model for surface coverage bead-based assays. This model examines the building blocks of surface coverage assays, including heterogeneous binding of analyte molecules on bead or sensor surfaces, attachment of bead labels to sensor surfaces, and generation of electrochemical current by bead labels. To demonstrate and validate this model, we analyze a semi-homogeneous bead-based electronic enzyme-linked immunosorbent assay and find that experimental results agree with various model predictions. We show that the model can provide design guidance for choice of various assay parameters including bead size, bead number, antibody affinity and assay time, and provide a perspective to reconcile the performance of various implementations of surface coverage assays.
Collapse
Affiliation(s)
- Dan Wu
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Joel Voldman
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.
| |
Collapse
|
3
|
Grześkowiak BF, Tuśnio K, Woźniak A, Szalata M, Lipiński D, Jurga S, Słomski R. Transgenic Plant Detection Using an AuNPs Based SPR Biosensor. BIOSENSORS-BASEL 2019; 9:bios9040116. [PMID: 31574896 PMCID: PMC6955715 DOI: 10.3390/bios9040116] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 09/20/2019] [Accepted: 09/26/2019] [Indexed: 12/04/2022]
Abstract
The intensive development and commercialization of genetically modified plants observed over the last decade has led to the development of transgenic detection methods that are rapid and sensitive. Among the strategies used for the detection/monitoring of genetically modified organisms (GMOs), surface plasmon resonance (SPR) meets the necessary criteria. This optical technique measures the changes in the refractive index in the vicinity of thin metal layers (i.e., gold) in response to biomolecular interactions occurring at a flat metal‒solution interface. Additionally, it allows the application of functionalized gold nanoparticles (AuNPs) in SPR research to enhance the signal intensity. In the present study, an SPR method, enhanced by the application of AuNPs, was developed to detect transgenic tobacco plants carrying a Streptococcus mutans antigen. The basis for the detection of the target DNA was the hybridization between the genomic DNA isolated from the leaves, stems, and roots of the transgenic tobacco and the biotinylated oligonucleotide probes immobilized onto a streptavidin (SA) sensor chip. SA-functionalized AuNPs coated with a second type of biotinylated probe were applied to increase the sensitivity of the detection method. Analysis of the results indicated that the constructed SPR-based sensor chip can potentially recognize complementary standard fragments (nonamplified genomic DNA) at concentrations as low as 1 pM. Thus, nonamplified transgenic DNA was detected using a label-free and real-time AuNPs-enhanced SPR biosensing method. This unique approach could be used to detect GMOs with high efficiency, even at a low detection limit, high repeatability, and with less time and a lower cost needed for each analysis.
Collapse
Affiliation(s)
- Bartosz F Grześkowiak
- The NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland.
| | - Karol Tuśnio
- The NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland.
- Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 11, 60-632 Poznan, Poland.
| | - Anna Woźniak
- The NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland.
| | - Marlena Szalata
- Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 11, 60-632 Poznan, Poland.
| | - Daniel Lipiński
- Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 11, 60-632 Poznan, Poland.
| | - Stefan Jurga
- The NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland.
| | - Ryszard Słomski
- Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 11, 60-632 Poznan, Poland.
| |
Collapse
|
4
|
Application of a Waveguide-Mode Sensor to Blood Testing for Hepatitis B Virus, Hepatitis C Virus, Human Immunodeficiency Virus and Treponema pallidum Infection. SENSORS 2019; 19:s19071729. [PMID: 30978941 PMCID: PMC6479333 DOI: 10.3390/s19071729] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/28/2019] [Accepted: 04/08/2019] [Indexed: 11/17/2022]
Abstract
Testing for blood-transmitted infectious agents is an important aspect of safe medical treatment. During emergencies, such as significant earthquakes, many patients need surgical treatment and/or blood transfusion. Because a waveguide mode (WM) sensor can be used as a portable, on-site blood testing device in emergency settings, we have previously developed WM sensors for detection of antibodies against hepatitis B virus and hepatitis C virus and for forward ABO and Rh(D) and reverse ABO blood typing. In this study, we compared signal enhancement methods using secondary antibodies conjugated with peroxidase, a fluorescent dye, and gold nanoparticles, and found that the peroxidase reaction method offers superior sensitivity while gold nanoparticles provide the most rapid detection of anti-HBs antibody. Next, we examined whether we could apply a WM sensor with signal enhancement with peroxidase or gold nanoparticles to detection of antibodies against hepatitis C virus, human immunodeficiency virus and Treponema pallidum, and HBs antigen in plasma. We showed that a WM sensor can detect significant signals of these infectious agents within 30 min. Therefore, a portable device utilizing a WM sensor can be used for on-site blood testing of infectious agents in emergency settings.
Collapse
|
5
|
Balahura LR, Stefan-Van Staden RI, Van Staden JF, Aboul-Enein HY. Advances in immunosensors for clinical applications. J Immunoassay Immunochem 2018; 40:40-51. [DOI: 10.1080/15321819.2018.1543704] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Liliana-Roxana Balahura
- Laboratory of Electrochemistry and PATLAB, National Institute of Research for Electrochemistry and Condensed Matter, Bucharest, Romania
| | - Raluca-Ioana Stefan-Van Staden
- Laboratory of Electrochemistry and PATLAB, National Institute of Research for Electrochemistry and Condensed Matter, Bucharest, Romania
| | - Jacobus Frederick Van Staden
- Laboratory of Electrochemistry and PATLAB, National Institute of Research for Electrochemistry and Condensed Matter, Bucharest, Romania
| | - Hassan Y. Aboul-Enein
- Pharmaceutical and Medicinal Chemistry Department, The Pharmaceutical and Drug Industries Research Division, National Research Centre, Cairo, Egypt
| |
Collapse
|
6
|
Farka Z, Juřík T, Kovář D, Trnková L, Skládal P. Nanoparticle-Based Immunochemical Biosensors and Assays: Recent Advances and Challenges. Chem Rev 2017; 117:9973-10042. [DOI: 10.1021/acs.chemrev.7b00037] [Citation(s) in RCA: 414] [Impact Index Per Article: 59.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zdeněk Farka
- Central
European Institute of Technology (CEITEC), ‡Department of Biochemistry, Faculty
of Science, and §Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Tomáš Juřík
- Central
European Institute of Technology (CEITEC), ‡Department of Biochemistry, Faculty
of Science, and §Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - David Kovář
- Central
European Institute of Technology (CEITEC), ‡Department of Biochemistry, Faculty
of Science, and §Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Libuše Trnková
- Central
European Institute of Technology (CEITEC), ‡Department of Biochemistry, Faculty
of Science, and §Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Petr Skládal
- Central
European Institute of Technology (CEITEC), ‡Department of Biochemistry, Faculty
of Science, and §Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| |
Collapse
|
7
|
Wu Q, Li S, Sun Y, Wang J. Hollow gold nanoparticle-enhanced SPR based sandwich immunoassay for human cardiac troponin I. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2245-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
8
|
Alimunnisa J, Ravichandran K, Meena K. Synthesis and characterization of Ag@SiO 2 core-shell nanoparticles for antibacterial and environmental applications. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.01.103] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
9
|
Chan C, Sepunaru L, Sokolov SV, Kätelhön E, Young NP, Compton RG. Catalytic activity of catalase-silica nanoparticle hybrids: from ensemble to individual entity activity. Chem Sci 2017; 8:2303-2308. [PMID: 28451333 PMCID: PMC5363393 DOI: 10.1039/c6sc04921d] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 12/14/2016] [Indexed: 01/01/2023] Open
Abstract
We demonstrate the electrochemical detection and characterization of individual nanoparticle–enzyme hybrids.
We demonstrate the electrochemical detection and characterization of individual nanoparticle–enzyme hybrids. Silica nanoparticles were functionalized with catalase enzyme and investigated spectroscopically and electrochemically. The catalytic activity of the hybrids towards hydrogen peroxide decomposition was comparable to the activity of a freely diffusing enzyme in solution, exhibiting a Michaelis–Menten constant of KM = 74 mM and a turnover number of kcat = 8 × 107 s–1 per NP. The fast turnover number of the hybrid further enabled the electrochemical detection of individual nanoparticle–enzyme hybrid via a novel method: the hydrogen peroxide substrate was generated at a microelectrode which enabled enzymatic activity exclusively within the diffusion layer of the electrode. The method is the first electrochemical approach for measuring hybrid nanoparticles, at the single entity level.
Collapse
Affiliation(s)
- Crystal Chan
- Department of Chemistry , Physical & Theoretical Chemistry Laboratory , University of Oxford , South Parks Road , Oxford OX1 3QZ , UK .
| | - Lior Sepunaru
- Department of Chemistry , Physical & Theoretical Chemistry Laboratory , University of Oxford , South Parks Road , Oxford OX1 3QZ , UK .
| | - Stanislav V Sokolov
- Department of Chemistry , Physical & Theoretical Chemistry Laboratory , University of Oxford , South Parks Road , Oxford OX1 3QZ , UK .
| | - Enno Kätelhön
- Department of Chemistry , Physical & Theoretical Chemistry Laboratory , University of Oxford , South Parks Road , Oxford OX1 3QZ , UK .
| | - Neil P Young
- Department of Materials , University of Oxford , OX1 3PH , UK
| | - Richard G Compton
- Department of Chemistry , Physical & Theoretical Chemistry Laboratory , University of Oxford , South Parks Road , Oxford OX1 3QZ , UK .
| |
Collapse
|
10
|
Stefan-van Staden RI, Mitrofan G. Fast screening of whole blood samples for early detection and monitoring of thyroid diseases. RSC Adv 2017. [DOI: 10.1039/c7ra08724a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Stochastic sensors based on inulins-ionic liquids, and diamond paste were used for pattern recognition of TSH, and thyroid hormones.
Collapse
Affiliation(s)
- Raluca-Ioana Stefan-van Staden
- Faculty of Applied Chemistry and Materials Science
- Politehnica University of Bucharest
- Bucharest
- Romania
- Laboratory of Electrochemistry and PATLAB Bucharest
| | - Grigorina Mitrofan
- Faculty of Applied Chemistry and Materials Science
- Politehnica University of Bucharest
- Bucharest
- Romania
| |
Collapse
|
11
|
Špringer T, Ermini ML, Špačková B, Jabloňků J, Homola J. Enhancing Sensitivity of Surface Plasmon Resonance Biosensors by Functionalized Gold Nanoparticles: Size Matters. Anal Chem 2014; 86:10350-6. [DOI: 10.1021/ac502637u] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tomáš Špringer
- Institute of Photonics and Electronics AS CR, v. v. i., Chaberská 57, 182 51, Prague, Czech Republic
| | - Maria Laura Ermini
- Institute of Photonics and Electronics AS CR, v. v. i., Chaberská 57, 182 51, Prague, Czech Republic
| | - Barbora Špačková
- Institute of Photonics and Electronics AS CR, v. v. i., Chaberská 57, 182 51, Prague, Czech Republic
| | - Jani Jabloňků
- Institute of Photonics and Electronics AS CR, v. v. i., Chaberská 57, 182 51, Prague, Czech Republic
| | - Jiří Homola
- Institute of Photonics and Electronics AS CR, v. v. i., Chaberská 57, 182 51, Prague, Czech Republic
| |
Collapse
|
12
|
|
13
|
Seia MA, Pereira SV, Fernández-Baldo MA, De Vito IE, Raba J, Messina GA. Zinc oxide nanoparticles based microfluidic immunosensor applied in congenital hypothyroidism screening. Anal Bioanal Chem 2014; 406:4677-84. [PMID: 24908405 DOI: 10.1007/s00216-014-7882-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 05/05/2014] [Accepted: 05/07/2014] [Indexed: 12/15/2022]
Abstract
In this article, we present an innovative approach for congenital hypothyroidism (CHT) screening. This pathology is the most common preventable cause of mental retardation, affecting newborns around the world. Its consequences could be avoided with an early diagnosis through the thyrotropin (TSH) level measurement. To accomplish the determination of TSH, synthesized zinc oxide (ZnO) nanobeads (NBs) covered by chitosan (CH), ZnO-CH NBs, were covalently attached to the central channel of the designed microfluidic device. These beads were employed as platform for anti-TSH monoclonal antibody immobilization to specifically recognize and capture TSH in neonatal samples without any special pretreatment. Afterwards, the amount of this trapped hormone was quantified by horseradish peroxidase (HRP)-conjugated anti-TSH antibody. HRP reacted with its enzymatic substrate in a redox process, which resulted in the appearance of a current whose magnitude was directly proportional to the level of TSH in the neonatal sample. The structure and morphology of synthesized ZnO-CH NBs were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The calculated detection limits for electrochemical detection and the enzyme-linked immunosorbent assay procedure were 0.00087 μUI mL(-1) and 0.015 μUI mL(-1), respectively, and the within- and between-assay coefficients of variation were below 6.31% for the proposed method. According to the cut-off value for TSH neonatal screening, a reasonably good limit of detection was achieved. These above-mentioned features make the system advantageous for routine clinical analysis adaptation.
Collapse
Affiliation(s)
- Marco A Seia
- INQUISAL, Department of Chemistry, National University of San Luis, CONICET, Chacabuco 917. D5700BWS, San Luis, Argentina
| | | | | | | | | | | |
Collapse
|
14
|
Yuk JS, Guignon EF, Lynes MA. Sensitivity enhancement of a grating-based surface plasmon-coupled emission (SPCE) bionsor chip using gold thickness. Chem Phys Lett 2014; 591:5-9. [PMID: 24505144 DOI: 10.1016/j.cplett.2013.10.081] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We describe a novel approach to enhance the sensitivity of a grating-based surface plasmon-coupled emission (SPCE) sensor by increasing the thickness of the metal film used in this system. The calculated optical properties of grating-based SPR spectra were significantly affected by both grating depth and by gold thickness. Higher angular sensitivity could be achieved at short wavelengths and under in situ measurement (analysis under aqueous condition). We confirmed the predicated enhancements of SPCE response using Alexa Fluor 647-labeled anti-mouse IgG immobilized on the SPCE sensor chips. Grating-coupled SPCE sensor chips can be used as a useful tool for high contents analysis of chemical and biomolecular interactions.
Collapse
Affiliation(s)
- Jong Seol Yuk
- Department of Molecular and Cell Biology University of Connecticut, 91 North Eagleville Road, Storrs, CT 06269-3125
| | | | - Michael A Lynes
- Department of Molecular and Cell Biology University of Connecticut, 91 North Eagleville Road, Storrs, CT 06269-3125
| |
Collapse
|
15
|
Xu G, Mahajan S, Roy I, Yong KT. Theranostic quantum dots for crossing blood-brain barrier in vitro and providing therapy of HIV-associated encephalopathy. Front Pharmacol 2013; 4:140. [PMID: 24298256 PMCID: PMC3828669 DOI: 10.3389/fphar.2013.00140] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/19/2013] [Indexed: 12/12/2022] Open
Abstract
The blood–brain barrier (BBB) is a complex physiological checkpoint that restricts the free diffusion of circulating molecules from the blood into the central nervous system. Delivering of drugs and other active agents across the BBB is one of the major technical challenges faced by scientists and medical practitioners. Therefore, development of novel methodologies to address this challenge holds the key for both the diagnosis and treatment of brain diseases, such as HIV-associated encephalopathy. Bioconjugated quantum dots (QDs) are excellent fluorescent probes and nano-vectors, being designed to transverse across the BBB and visualize drug delivery inside the brain. This paper discusses the use of functionalized QDs for crossing the blood–brain barrier and treating brain disease. We highlight the guidelines for using in vitro BBB models for brain disease studies. The theranostic QDs offers a strategy to significantly improve the effective dosages of drugs to transverse across the BBB and orientate to the targets inside the brain.
Collapse
Affiliation(s)
- Gaixia Xu
- College of Optoelectronic Engineering, Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education/Guangdong Province, Shenzhen University Shenzhen, China
| | | | | | | |
Collapse
|
16
|
Label-enhanced surface plasmon resonance: a new concept for improved performance in optical biosensor analysis. SENSORS 2013; 13:15348-63. [PMID: 24217357 PMCID: PMC3871110 DOI: 10.3390/s131115348] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 10/29/2013] [Accepted: 11/02/2013] [Indexed: 11/20/2022]
Abstract
Surface plasmon resonance (SPR) is a well-established optical biosensor technology with many proven applications in the study of molecular interactions as well as in surface and material science. SPR is usually applied in the label-free mode which may be advantageous in cases where the presence of a label may potentially interfere with the studied interactions per se. However, the fundamental challenges of label-free SPR in terms of limited sensitivity and specificity are well known. Here we present a new concept called label-enhanced SPR, which is based on utilizing strongly absorbing dye molecules in combination with the evaluation of the full shape of the SPR curve, whereby the sensitivity as well as the specificity of SPR is significantly improved. The performance of the new label-enhanced SPR method was demonstrated by two simple model assays: a small molecule assay and a DNA hybridization assay. The small molecule assay was used to demonstrate the sensitivity enhancement of the method, and how competitive assays can be used for relative affinity determination. The DNA assay was used to demonstrate the selectivity of the assay, and the capabilities in eliminating noise from bulk liquid composition variations.
Collapse
|
17
|
|
18
|
Biofunctionalized gold nanoparticles for SPR-biosensor-based detection of CEA in blood plasma. Anal Bioanal Chem 2012; 404:2869-75. [PMID: 22895740 DOI: 10.1007/s00216-012-6308-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Revised: 07/25/2012] [Accepted: 07/27/2012] [Indexed: 10/28/2022]
Abstract
We report on the use of new biofunctionalized gold nanoparticles (bio-AuNPs) that enable a surface plasmon resonance (SPR) biosensor to detect low levels of carcinoembryonic antigen (CEA) in human blood plasma. Bio-AuNPs consist of gold nanoparticles functionalized both with (1) streptavidin, to provide high affinity for the biotinylated secondary antibody used in the second step of the CEA sandwich assay, and with (2) bovine serum albumin, to minimize the nonspecific interaction of the bio-AuNPs with complex samples (blood plasma). We demonstrate that this approach makes it possible for the SPR biosensor to detect CEA in blood plasma at concentrations as low as 0.1 ng/mL, well below normal physiological levels (approximately nanograms per milliliter). Moreover, the limit of detection achieved using this approach is better by a factor of more than 1,000 than limits of detection reported so far for CEA in blood plasma using SPR biosensors.
Collapse
|
19
|
Guo X. Surface plasmon resonance based biosensor technique: a review. JOURNAL OF BIOPHOTONICS 2012; 5:483-501. [PMID: 22467335 DOI: 10.1002/jbio.201200015] [Citation(s) in RCA: 170] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2012] [Revised: 03/10/2012] [Accepted: 03/11/2012] [Indexed: 05/12/2023]
Abstract
Optical Surface plasmon resonance (SPR) biosensors represent the most advanced and developed optical label-free biosensor technology. Optical SPR biosensors are a powerful detection and analysis tool that has vast applications in environmental protection, biotechnology, medical diagnostics, drug screening, food safety and security. This article reviews the recent development of SPR biosensor techniques, including bulk SPR and localized SPR (LSPR) biosensors, for detecting interactions between an analyte of interest in solution and a biomolecular recognition. The concepts of bulk and localized SPs and the working principles of both sensing techniques are introduced. Major sensing advances on biorecognition elements, measurement formats, and sensing platforms are presented. Finally, the discussions on both biosensor techniques as well as comparison of both SPR sensing techniques are made.
Collapse
Affiliation(s)
- Xiaowei Guo
- School of Electrical Engineering and Computer Science, and College of Engineering, Seoul National University, 599 Gwanangno, Gwanak-gu, Seoul 151-744, South Korea.
| |
Collapse
|
20
|
Wenger B, Kugelbrey K, Gao H, Sigrist H, Voirin G. Au-labeled antibodies to enhance the sensitivity of a refractometric immunoassay: Detection of cocaine. Biosens Bioelectron 2012; 34:94-9. [DOI: 10.1016/j.bios.2012.01.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Revised: 01/14/2012] [Accepted: 01/17/2012] [Indexed: 10/14/2022]
|
21
|
|
22
|
Detecting a secreted gastric cancer biomarker molecule by targeted nanoparticles for real-time diagnostics. Pharm Res 2011; 29:983-93. [PMID: 22160813 DOI: 10.1007/s11095-011-0638-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Accepted: 11/21/2011] [Indexed: 10/14/2022]
Abstract
PURPOSE A real time detection of gastric cancer-associated biomarker molecules in the lumen of the stomach could assist in early detection of this multi-step malignancy. METHODS Employing α1-antitrypsin precursor (A1AT) as a secreted biomarker model, a platform with immunoassay capabilities, comprising sensing and detecting compartments was developed. It was made of a microarray-type functionalized glass, containing a high density of amine groups. Trypsin, the capturing moiety, was immobilized to the glass surface with the aid of a PEG-based spacer mixture, identified as being crucial for both capturing and detecting properties. The detecting compartment contained near infrared fluorescently labeled nanoparticles conjugated to A1AT-specific antibodies, aimed at generating an optical signal, detectable by a conventional endoscope or a video capsule. RESULTS The specific recognition reaction between the captured A1AT and the immuno-nanoparticles generated a profound fluorescence with a signal to noise ratio (SNR) of 12-32, in a biomarker-concentration dependent manner. Moreover, the optical recognition signal was intense enough to be detected by a video capsule simulator (with optical detection capabilities of a video capsule) with a SNR of 6-20. CONCLUSIONS This platform could serve as a real time diagnostic kit for early detection of a secreted biomarker of gastric cancer.
Collapse
|
23
|
Krause JE, Brault ND, Li Y, Xue H, Zhou Y, Jiang S. Photoiniferter-Mediated Polymerization of Zwitterionic Carboxybetaine Monomers for Low-Fouling and Functionalizable Surface Coatings. Macromolecules 2011. [DOI: 10.1021/ma202007h] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Jordan E. Krause
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Norman D. Brault
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Yuting Li
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Hong Xue
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Yibo Zhou
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Shaoyi Jiang
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| |
Collapse
|
24
|
Pelossof G, Tel-Vered R, Liu XQ, Willner I. Amplified surface plasmon resonance based DNA biosensors, aptasensors, and Hg2+ sensors using hemin/G-quadruplexes and Au nanoparticles. Chemistry 2011; 17:8904-12. [PMID: 21726008 DOI: 10.1002/chem.201100601] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Indexed: 11/07/2022]
Abstract
Thiolated nucleic acid hairpin nanostructures that include in their stem region a "caged" G-quadruplex sequence, and in their single-stranded loop region oligonucleotide recognition sequences for DNA, adenosine monophosphate (AMP), or Hg(2+) ions were linked to bare Au surfaces or to Au nanoparticles (NPs) linked to Au surfaces. The opening of the hairpin nanostructures associated with the bare Au surface by the complementary target DNA, AMP substrate, or Hg(2+) ions, in the presence of hemin, led to the self-assembly of hemin/G-quadruplexes on the surface. The resulting dielectric changes on the surface exhibited shifts in the surface plasmon resonance (SPR) spectra, thus providing a readout signal for the recognition events. A similar opening of the hairpin nanostructures, immobilized on the Au NPs associated with the Au surface, by the DNA, AMP, or Hg(2+) led to an ultrasensitive SPR-amplified detection of the respective analytes. The amplification originated from the coupling between the localized surface plasmon associated with the NPs and the surface plasmon wave, an effect that cooperatively amplifies the SPR shifts that result from the formation of the hemin/G-quadruplexes. The different sensing platforms reveal impressive sensitivities and selectivities toward the target analytes.
Collapse
Affiliation(s)
- Gilad Pelossof
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | | | | | | |
Collapse
|
25
|
Liu Y, Guo CX, Hu W, Lu Z, Li CM. Sensitive protein microarray synergistically amplified by polymer brush-enhanced immobilizations of both probe and reporter. J Colloid Interface Sci 2011; 360:593-9. [PMID: 21640998 DOI: 10.1016/j.jcis.2011.05.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Revised: 05/09/2011] [Accepted: 05/10/2011] [Indexed: 01/28/2023]
Abstract
Great challenge remains to continuously improve sensitivity of protein microarrays for broad applications. A copolymer brush is in situ synthesized on both substrate and silica nanoparticle (SNP) surface to efficiently immobilize probe and reporter protein respectively for synergistic amplification of protein microarray signals. As a demonstration, sandwich immunoassay for a cancer biomarker carcinoembryonic antigen (CEA) detection is performed on microarray platform, showing a limit of detection (LOD) of 10 pg/ml and dynamic range of 10 pg/ml to 100 ng/ml. Two orders improvement of LOD is achieved in comparison to the small crosslinker-activated substrate. The improved sensitivity is attributed to not only the high immobilization amount of both probe and reporter but also the favorite protein binding orientations offered by the flexible brushes. This work provides a universal approach to inexpensively and significantly improve protein microarray sensitivity.
Collapse
Affiliation(s)
- Yingshuai Liu
- Institute for Clean Energy & Advanced Materials, Southwest University, Chongqing 400715, PR China
| | | | | | | | | |
Collapse
|
26
|
Molecularly imprinted Au nanoparticles composites on Au surfaces for the surface plasmon resonance detection of pentaerythritol tetranitrate, nitroglycerin, and ethylene glycol dinitrate. Anal Chem 2011; 83:3082-8. [PMID: 21434640 DOI: 10.1021/ac1033424] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecularly imprinted Au nanoparticles (NPs) composites are generated on Au-coated glass surfaces. The imprinting process involves the electropolymerization of thioaniline-functionalized Au NPs (3.5 nm) on a thioaniline monolayer-modified Au surface in the presence of a carboxylic acid, acting as a template analogue for the respective explosive. The exclusion of the imprinting template from the Au NPs matrix yields the respective imprinted composites. The binding of the analyte explosives to the Au NPs matrixes is probed by surface plasmon resonance spectroscopy, SPR, where the electronic coupling between the localized plasmon of the Au NPs and the surface plasmon wave leads to the amplification of the SPR responses originating from the dielectric changes of the matrixes upon binding of the different explosive materials. The resulting imprinted matrixes reveal high affinities and selectivity toward the imprinted explosives. Using citric acid as an imprinting template, Au NPs matrixes for the specific analysis of pentaerythritol tetranitrate (PETN) or of nitroglycerin (NG) were prepared, leading to detection limits of 200 fM and 20 pM, respectively. Similarly, using maleic acid or fumaric acid as imprinting templates, high-affinity sensing composites for ethylene glycol dinitrate (EGDN) were synthesized, leading to a detection limit of 400 fM for both matrixes.
Collapse
|
27
|
Lee D, Chander Y, Goyal SM, Cui T. Carbon nanotube electric immunoassay for the detection of swine influenza virus H1N1. Biosens Bioelectron 2011; 26:3482-7. [PMID: 21354779 PMCID: PMC7126489 DOI: 10.1016/j.bios.2011.01.029] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Revised: 01/20/2011] [Accepted: 01/20/2011] [Indexed: 11/06/2022]
Abstract
A low-cost, label-free, ultra-sensitive electric immunoassay is developed for the detection of swine influenza virus (SIV) H1N1. The assay is based on the excellent electrical properties of single-walled carbon nanotubes (SWCNTs). Antibody–virus complexes influence the conductance of underlying SWCNT thin film, which has been constructed by facile layer-by-layer self-assembly. The basic steps of conventional immunoassay are performed followed by the electric characterization of immunochips at the last stage. The resistance of immunochips tends to increase upon surface adsorption of macromolecules such as poly-l-lysine, anti-SIV antibodies, and SIVs during the assay. The resistance shift after the binding of SIV with anti-SIV antibody is normalized with the resistances of bare devices. The sensor selectivity tests are performed with non-SIVs, showing the normalized resistance shift of 12% as a background. The detection limit of 180 TCID50/ml of SIV is obtained suggesting a potential application of this assay as point-of-care detection or monitoring system. This facile CNT-based immunoassay also has the potential to be used as a sensing platform for lab-on-a-chip system.
Collapse
Affiliation(s)
- Dongjin Lee
- Department of Mechanical Engineering, University of Minnesota, 111 Church St. S.E., Minneapolis, MN 55455, USA
| | | | | | | |
Collapse
|
28
|
Samanta D, Sarkar A. Immobilization of bio-macromolecules on self-assembled monolayers: methods and sensor applications. Chem Soc Rev 2011; 40:2567-92. [DOI: 10.1039/c0cs00056f] [Citation(s) in RCA: 313] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
29
|
Chatterjee DK, Gnanasammandhan MK, Zhang Y. Small upconverting fluorescent nanoparticles for biomedical applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:2781-95. [PMID: 21064086 DOI: 10.1002/smll.201000418] [Citation(s) in RCA: 319] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Fluorescent labels have been widely used for biological applications, primarily in imaging and assays. Traditional fluorophores such as fluorescent dyes are mainly based on downconversion fluorescence, which have several drawbacks such as photobleaching, high background noise from autofluorescence, and considerable photodamage to biological materials. Upconverting fluorescent nanoparticles emit detectable photons of higher energy in the near-infrared (NIR) or visible range upon irradiation with an NIR light in a process termed 'upconversion.' They overcome some of the disadvantages faced by conventional downconversion labels, thus making them an ideal fluorescent label for biological applications. This review looks at the development of these particles, critically examines the reported applications, and discusses their future in biomedicine.
Collapse
Affiliation(s)
- Dev K Chatterjee
- Division of Bioengineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574
| | | | | |
Collapse
|
30
|
Riskin M, Tel-Vered R, Frasconi M, Yavo N, Willner I. Stereoselective and Chiroselective Surface Plasmon Resonance (SPR) Analysis of Amino Acids by Molecularly Imprinted Au-Nanoparticle Composites. Chemistry 2010; 16:7114-20. [DOI: 10.1002/chem.200903215] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
31
|
Frasconi M, Tel-Vered R, Riskin M, Willner I. Surface plasmon resonance analysis of antibiotics using imprinted boronic acid-functionalized Au nanoparticle composites. Anal Chem 2010; 82:2512-9. [PMID: 20170134 DOI: 10.1021/ac902944k] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Au nanoparticles (NPs) are functionalized with thioaniline electropolymerizable groups and (mercaptophenyl)boronic acid. The antibiotic substrates neomycin (NE), kanamycin (KA), and streptomycin (ST) include vicinal diol functionalities and, thus, bind to the boronic acid ligands. The electropolymerization of the functionalized Au NPs in the presence of NE, KA, or ST onto Au surfaces yields bisaniline-cross-linked Au NP composites that, after removal of the ligated antibiotics, provide molecularly imprinted matrixes which reveal high sensitivities toward the sensing of the imprinted antibiotic analytes (detection limits for analyzing NE, KA, and ST correspond to 2.00 +/- 0.21 pM, 1.00 +/- 0.10 pM, and 200 +/- 30 fM, respectively). The antibiotics are sensed by surface plasmon resonance (SPR) spectroscopy, where the coupling between the localized plasmon of the NPs and the surface plasmon wave associated with the Au surface is implemented to amplify the SPR responses. The imprinted Au NP composites are, then, used to analyze the antibiotics in milk samples.
Collapse
Affiliation(s)
- Marco Frasconi
- Institute of Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | | | | | | |
Collapse
|
32
|
Shi H, He X, Yang X, Wang K, Wang Q, Guo Q, Huo X. Protein analysis based on molecular beacon probes and biofunctionalized nanoparticles. Sci China Chem 2010; 53:704-719. [PMID: 32214997 PMCID: PMC7088759 DOI: 10.1007/s11426-010-0110-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Accepted: 02/07/2010] [Indexed: 01/10/2023]
Abstract
With the completion of the human genome-sequencing project, there has been a resulting change in the focus of studies from genomics to proteomics. By utilizing the inherent advantages of molecular beacon probes and biofunctionalized nanoparticles, a series of novel principles, methods and techniques have been exploited for bioanalytical and biomedical studies. This review mainly discusses the applications of molecular beacon probes and biofunctionalized nanoparticles-based technologies for real-time, in-situ, highly sensitive and highly selective protein analysis, including the nonspecific or specific protein detection and separation, protein/DNA interaction studies, cell surface protein recognition, and antigen-antibody binding process-based bacteria assays. The introduction of molecular beacon probes and biofunctionalized nanoparticles into the protein analysis area would necessarily advance the proteomics research.
Collapse
Affiliation(s)
- Hui Shi
- 1State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082 China.,2College of Chemistry and Chemical Engineering, Biomedical Engineering Center, Hunan University, Changsha, 410082 China.,Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha, 410082 China
| | - XiaoXiao He
- 1State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082 China.,2College of Chemistry and Chemical Engineering, Biomedical Engineering Center, Hunan University, Changsha, 410082 China.,Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha, 410082 China
| | - XiaoHai Yang
- 1State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082 China.,2College of Chemistry and Chemical Engineering, Biomedical Engineering Center, Hunan University, Changsha, 410082 China.,Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha, 410082 China
| | - KeMin Wang
- 1State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082 China.,2College of Chemistry and Chemical Engineering, Biomedical Engineering Center, Hunan University, Changsha, 410082 China.,Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha, 410082 China
| | - Qing Wang
- 1State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082 China.,2College of Chemistry and Chemical Engineering, Biomedical Engineering Center, Hunan University, Changsha, 410082 China.,Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha, 410082 China
| | - QiuPing Guo
- 1State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082 China.,2College of Chemistry and Chemical Engineering, Biomedical Engineering Center, Hunan University, Changsha, 410082 China.,Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha, 410082 China
| | - XiQin Huo
- 1State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082 China.,2College of Chemistry and Chemical Engineering, Biomedical Engineering Center, Hunan University, Changsha, 410082 China.,Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha, 410082 China
| |
Collapse
|
33
|
Ben-Amram Y, Riskin M, Willner I. Selective and enantioselective analysis of mono- and disaccharides using surface plasmon resonance spectroscopy and imprinted boronic acid-functionalized Au nanoparticle composites. Analyst 2010; 135:2952-9. [DOI: 10.1039/c0an00268b] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Achatz DE, Mező G, Kele P, Wolfbeis OS. Probing the Activity of Matrix Metalloproteinase II with a Sequentially Click-Labeled Silica Nanoparticle FRET Probe. Chembiochem 2009; 10:2316-20. [DOI: 10.1002/cbic.200900261] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
35
|
Riskin M, Tel-Vered R, Lioubashevski O, Willner I. Ultrasensitive Surface Plasmon Resonance Detection of Trinitrotoluene by a Bis-aniline-Cross-Linked Au Nanoparticles Composite. J Am Chem Soc 2009; 131:7368-78. [DOI: 10.1021/ja9001212] [Citation(s) in RCA: 210] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Riskin
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Ran Tel-Vered
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Oleg Lioubashevski
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Itamar Willner
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| |
Collapse
|
36
|
D'Agata R, Corradini R, Grasso G, Marchelli R, Spoto G. Ultrasensitive detection of DNA by PNA and nanoparticle-enhanced surface plasmon resonance imaging. Chembiochem 2009; 9:2067-70. [PMID: 18680134 DOI: 10.1002/cbic.200800310] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Roberta D'Agata
- Dipartimento di Scienze Chimiche, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | | | | | | | | |
Collapse
|
37
|
Luo Y, Yu F, Zare RN. Microfluidic device for immunoassays based on surface plasmon resonance imaging. LAB ON A CHIP 2008; 8:694-700. [PMID: 18432338 DOI: 10.1039/b800606g] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We have designed and fabricated a polydimethylsiloxane (PDMS) microfluidic device containing an array of gold spots onto which antigens or antibodies of interest can be attached. We use surface plasmon resonance (SPR) imaging to monitor the antibody-antigen recognition and binding events. This combination offers two significant advantages: (1) the microfluidic device dramatically reduces reaction time and sample consumption; and (2) the SPR imaging yields real-time detection of the immunocomplex formation. Thus, an immunoreaction may be detected and quantitatively characterized in about 10 min. The sensitivity of this method is at the subnanomolar level. When gold nanoparticles are selectively coupled to the immunocomplex to cause signal amplification, the sensitivity reaches the ten to one hundred picomolar level but the time required increases to about 60 min.
Collapse
Affiliation(s)
- Yiqi Luo
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA
| | | | | |
Collapse
|
38
|
Mader H, Li X, Saleh S, Link M, Kele P, Wolfbeis OS. Fluorescent Silica Nanoparticles. Ann N Y Acad Sci 2008; 1130:218-23. [DOI: 10.1196/annals.1430.053] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
39
|
Homola J. Surface plasmon resonance sensors for detection of chemical and biological species. Chem Rev 2008; 108:462-93. [PMID: 18229953 DOI: 10.1021/cr068107d] [Citation(s) in RCA: 1743] [Impact Index Per Article: 108.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jirí Homola
- Institute of Photonics and Electronics ASCR, Chaberská 57, 182 51 Prague 8, Czech Republic.
| |
Collapse
|
40
|
Akagi T, Baba M, Akashi M. Preparation of nanoparticles by the self-organization of polymers consisting of hydrophobic and hydrophilic segments: Potential applications. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.08.038] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
41
|
Sun Y, Bai Y, Song D, Li X, Wang L, Zhang H. Design and performances of immunoassay based on SPR biosensor with magnetic microbeads. Biosens Bioelectron 2007; 23:473-8. [PMID: 17764924 DOI: 10.1016/j.bios.2007.06.016] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Revised: 06/11/2007] [Accepted: 06/15/2007] [Indexed: 10/23/2022]
Abstract
A surface plasmon resonance (SPR) biosensor system was developed for immunoassay, based on the conjugates of magnetic microbeads coupling with antibody which could be trapped on the Au film firmly due to the magnetic force. The magnetic microbeads were used as the solid support for the heat shock protein 70 (Hsp 70) antibody and antibody immobilized magnetic microbeads were utilized instead of the single antibody for the determination of Hsp 70. Since the magnetic bead is coated with dextran, the antibodies and some specific biomolecular receptors can be immobilized using a variety of chemical reactions. Compared to traditional antibody immobilization on the sensing film, there is not a covalent link between the Au film and the antibody. There is a great advantage in that sensor can be stripped and reused, and the same chemistry used to derivative dextran-coated SPR sensors can be used for the magnetic bead-coated sensors. The sensing layer was formed well. Different dilution ratios (v/v) of the conjugates result in different detectable ranges. When the dilution ratios of the conjugate are 1:10 and 1:5, the lowest concentrations of Hsp 70 that can be detected are 1.50 and 0.30 microg ml(-1), respectively.
Collapse
Affiliation(s)
- Ying Sun
- College of Chemistry, Jilin University, Changchun 130012, PR China
| | | | | | | | | | | |
Collapse
|
42
|
Abstract
With increasing reports on bioterrorism, avian flu, and other bio-threats, rapid and real time detection methods are highly warranted. Studies on developing highly sensitive immunosensors aiming at the early detection and clinical diagnoses of various diseases including cancer are undertaken all over the globe. Carbon nanotubes (CNTs) have been widely discussed as materials with enormous potential for a wide range of in vivo and in vitro bioapplications, ranging from drug delivery to highly sensitive biosensors, owing to their superior electronic and mechanical properties along with nanoscale dimensions. Though a lot of attention has been drawn toward carbon nanotubes for the past 15 years in academia and to a certain extent in industry, CNT-based immunosensors and other applications are still in the nascent stage, and there are many challenges to be overcome for the successful commercialization of the concepts. This article highlights on the recent developments and the possible impacts of carbon nanotube based immunosensors.
Collapse
Affiliation(s)
- Jithesh V Veetil
- Biomedical Engineering Program, College of Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | | |
Collapse
|
43
|
Liu J, Tian S, Tiefenauer L, Nielsen PE, Knoll W. Simultaneously amplified electrochemical and surface plasmon optical detection of DNA hybridization based on ferrocene-streptavidin conjugates. Anal Chem 2007; 77:2756-61. [PMID: 15859590 DOI: 10.1021/ac048088c] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A sensitive method based on ferrocene-streptavidin (Fc-Stv) conjugates for the simultaneously amplified electrochemical and surface plasmon optical detection of DNA target hybridization to peptide nucleic acid-modified gold surfaces is reported. The attachment of Fc-Stv to the biotinylated complementary target DNA not only amplified the surface plasmon resonance signal but also enhanced the electrochemical signal due to the many Fc markers per Stv. The ferrocene redox peak current increased with the increase of the target DNA concentration. Consequently, the amount of hybridized target DNA can be estimated by cyclic voltammetry and chronocoulometry. The detection limit of this DNA sensor is 10 pM (2 fmol, with signal to noise > 3). This sensor was also shown to have high selectivity (at the single-base mismatch level) and good reproducibility.
Collapse
Affiliation(s)
- Jianyun Liu
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
| | | | | | | | | |
Collapse
|
44
|
Kokko L, Lövgren T, Soukka T. Europium(III)-chelates embedded in nanoparticles are protected from interfering compounds present in assay media. Anal Chim Acta 2007; 585:17-23. [DOI: 10.1016/j.aca.2006.12.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2006] [Revised: 12/05/2006] [Accepted: 12/07/2006] [Indexed: 11/29/2022]
|
45
|
Sun Y, Song D, Li Z, Bai Y, Zhang H. Surface plasmon resonance biosensor based on Hg/Ag–Au film. Anal Bioanal Chem 2007; 387:1875-82. [PMID: 17205267 DOI: 10.1007/s00216-006-1042-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2006] [Revised: 11/16/2006] [Accepted: 11/22/2006] [Indexed: 10/23/2022]
Abstract
Mercury or silver was electrodeposited on an Au surface to form an Hg-Au or Ag-Au film. Wavelength-modulation SPR biosensors based on this Hg/Ag-Au film were then used to determine human IgG and rabbit IgG. When direct immunoreactions were performed on the Au sensing surface, the range of concentrations of human IgG and rabbit IgG that could be determined were 2.00-40.00 microg/ml and 2.50-40.00 microg/ml, respectively. When Hg was electrodeposited onto the Au film for 1200 s, the range of concentrations of human IgG and rabbit IgG that could be determined were 0.50-40.00 microg/ml and 0.63-40.00 microg/ml, respectively. When Ag was electrodeposited onto the Au film for 1500 s, the range of concentrations of human IgG and rabbit IgG that could be determined were 0.25-20.00 and 0.42-20.00 microg/ml, respectively. The biosensor based on Ag-Au film was therefore found to be the most sensitive of the three types of biosensor tested, giving limits of determination that were up to eight times lower than those obtained with a biosensor based on Au film alone.
Collapse
Affiliation(s)
- Ying Sun
- College of Chemistry, Jilin University, Changchun 130012, China
| | | | | | | | | |
Collapse
|
46
|
Masson JF, Battaglia TM, Khairallah P, Beaudoin S, Booksh KS. Quantitative Measurement of Cardiac Markers in Undiluted Serum. Anal Chem 2007; 79:612-9. [PMID: 17222027 DOI: 10.1021/ac061089f] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two mycocardial infarction biomarkers, myoglobin (MG) and cardiac troponin I (cTnI), were quantified at biological levels and in undiluted serum without sample pretreatment using surface plasmon resonance (SPR) sensors. To achieve detection of biomarkers in undiluted serum (72 mg/mL total protein concentration), minimization of the nonspecific signal from the serum protein was achieved by immobilizing the antibody for the biomarkers on an N-hydroxysuccinimide activated 16-mercaptohexadecanoic acid self-assembled monolayer. This monolayer reduces the nonspecific signal from serum proteins in such a manner that short exposure of the sensor to serum prior to analysis prevents any further nonspecific adsorption during analysis. Thus, sensing of MG and cTnI was achieved on the basis of the difference between signals from the active sensor and a reference sensor that captured background interference. This resulted in direct measurement of these biomarkers in undiluted serum. Detection limits for both markers were below 1 ng/mL, which is below the threshold needed to detect myocardial infarction. Detecting biomarkers in the low ng/mL range without signal amplification in such a complex matrix as serum corresponds to a selectivity of 108. The root-mean-square-error (RMSE) of calibration was below 2 ng/mL.
Collapse
Affiliation(s)
- Jean-Francois Masson
- Department of Chemistry and Biochemistry, Arizona State University, Mail Code 1604, Tempe, Arizona 85287-1604, USA
| | | | | | | | | |
Collapse
|
47
|
|
48
|
Gong JL, Jiang JH, Liang Y, Shen GL, Yu RQ. Synthesis and characterization of surface-enhanced Raman scattering tags with Ag/SiO2 core–shell nanostructures using reverse micelle technology. J Colloid Interface Sci 2006; 298:752-6. [PMID: 16457836 DOI: 10.1016/j.jcis.2006.01.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2005] [Revised: 01/07/2006] [Accepted: 01/16/2006] [Indexed: 10/25/2022]
Abstract
A novel simplified method for synthesis of surface-enhanced Raman scattering tags has been reported. This synthesis method is based on reverse micelle technique using Igepal CO-520 as a surfactant and the mixed solution of silver nitrate and rhodamine dyes with isothiocyanate group as water pool followed by hydrazine hydrate reduction and TEOS polymerization leading to the formation of silica layer surrounding the silver core. Compared to the method reported in literature, the proposed methodology eliminates the necessity of vitrophilic pretreatment and makes it possible to complete all different processes including the preparation of silver nanoparticles, the conjugation of dye molecules and the formation of silica shell in the microreactor. The nanoparticle-based surface-enhanced Raman tags obtained are composed of silver core conjugated with rhodamine dyes and an encasing silica shell. Both the dyes themselves and the Ag/SiO2 core-shell nanoparticles without the encapsulation of dyes exhibit no Raman signals. However, the Ag/SiO2 core-shell nanoparticles exhibit strong Raman signals when encapsulated with these dyes. This is due to the appearance of fluorescence quenching and surface-enhanced Raman scattering effect resulting from the conjugation of dyes and silver core. The Raman tags were characterized using transmission electron microscopy (TEM), UV-visible absorption spectrometry, and Raman spectrometry.
Collapse
Affiliation(s)
- Ji-Lai Gong
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | | | | | | | | |
Collapse
|
49
|
Sensitivity enhancement of wavelength modulation surface plasmon resonance biosensor by improving the baseline solution. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.04.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
50
|
Yuk JS, Hong DG, Jung JW, Jung SH, Kim HS, Han JA, Kim YM, Ha KS. Sensitivity enhancement of spectral surface plasmon resonance biosensors for the analysis of protein arrays. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2006; 35:469-76. [PMID: 16601966 DOI: 10.1007/s00249-006-0054-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Revised: 02/22/2006] [Accepted: 03/14/2006] [Indexed: 10/24/2022]
Abstract
A novel method for sensitivity enhancement of spectral surface plasmon resonance (SPR) biosensors was presented by reducing the refractive index of the sensing prism in the analysis of protein arrays. Sensitivity of spectral SPR biosensors with two different prisms (BK-7, fused silica) was analyzed by net shifts of resonance wavelength for specific interactions of GST-GTPase binding domain of p21-activated kinase-1 and anti-GST on a mixed thiol surface. Sensitivity was modulated by the refractive index of the sensing prism of the spectral SPR biosensors with the same incidence angle. The sensitivity of a spectral SPR biosensor with a fused silica prism was 1.6 times higher than that with a BK-7 prism at the same incidence angle of 46.2 degrees. This result was interpreted by increment of the penetration depth correlated with evanescent field intensity at the metal/dielectric interface. Therefore, it is suggested that sensitivity enhancement is readily achieved by reducing the refractive index of the sensing prism of spectral SPR biosensors to be operated at long wavelength ranges for the analysis of protein arrays.
Collapse
Affiliation(s)
- Jong Seol Yuk
- Department of Molecular and Cellular Biochemistry and Nano-Bio Sensor Research Center, Kangwon National University School of Medicine, Chunchon, Kangwon-Do, 200-701, South Korea
| | | | | | | | | | | | | | | |
Collapse
|