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Robin P, Gerber-Lemaire S. Design and Preparation of Sensing Surfaces for Capacitive Biodetection. BIOSENSORS 2022; 13:17. [PMID: 36671852 PMCID: PMC9856139 DOI: 10.3390/bios13010017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Despite their high sensitivity and their suitability for miniaturization, biosensors are still limited for clinical applications due to the lack of reproducibility and specificity of their detection performance. The design and preparation of sensing surfaces are suspected to be a cause of these limitations. Here, we first present an updated overview of the current state of use of capacitive biosensors in a medical context. Then, we summarize the encountered strategies for the fabrication of capacitive biosensing surfaces. Finally, we describe the characteristics which govern the performance of the sensing surfaces, along with recent developments that were suggested to overcome their main current limitations.
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Teeparuksapun K, Hedström M, Mattiasson B. A Sensitive Capacitive Biosensor for Protein a Detection Using Human IgG Immobilized on an Electrode Using Layer-by-Layer Applied Gold Nanoparticles. SENSORS (BASEL, SWITZERLAND) 2021; 22:99. [PMID: 35009642 PMCID: PMC8747357 DOI: 10.3390/s22010099] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/20/2021] [Accepted: 11/23/2021] [Indexed: 06/14/2023]
Abstract
A capacitive biosensor for the detection of protein A was developed. Gold electrodes were fabricated by thermal evaporation and patterned by photoresist photolithography. A layer-by-layer (LbL) assembly of thiourea (TU) and HAuCl4 and chemical reduction was utilized to prepare a probe with a different number of layers of TU and gold nanoparticles (AuNPs). The LbL-modified electrodes were used for the immobilization of human IgG. The binding interaction between human IgG and protein A was detected as a decrease in capacitance signal, and that change was used to investigate the correlation between the height of the LbL probe and the sensitivity of the capacitive measurement. The results showed that the initial increase in length of the LbL probe can enhance the amount of immobilized human IgG, leading to a more sensitive assay. However, with thicker LbL layers, a reduction of the sensitivity of the measurement was registered. The performance of the developed system under optimum set-up showed a linearity in response from 1 × 10-16 to 1 × 10-13 M, with the limit detection of 9.1 × 10-17 M, which could be interesting for the detection of trace amounts of protein A from affinity isolation of therapeutic monoclonal antibodies.
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Affiliation(s)
- Kosin Teeparuksapun
- Science Program, Department of General Education, Faculty of Liberal Arts, Rajamangala University of Technology Srivijaya, Songkhla 90000, Thailand;
- Division of Biotechnology, Lund University, P.O. Box 124, 221 00 Lund, Sweden;
| | - Martin Hedström
- Division of Biotechnology, Lund University, P.O. Box 124, 221 00 Lund, Sweden;
| | - Bo Mattiasson
- Division of Biotechnology, Lund University, P.O. Box 124, 221 00 Lund, Sweden;
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Bergdahl GE, Hedström M, Mattiasson B. Capacitive Saccharide Sensor Based on Immobilized Phenylboronic Acid with Diol Specificity. Appl Biochem Biotechnol 2019; 188:124-137. [PMID: 30370445 PMCID: PMC6509085 DOI: 10.1007/s12010-018-2911-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 10/19/2018] [Indexed: 01/12/2023]
Abstract
A capacitive sensor for saccharide detection is described in this study. The detection is based on selective interaction between diols and aminophenylboronic acid (APBA) immobilized on a gold electrode. Glucose, fructose, and dextran (MW: 40 kDa) were tested with the system over wide concentration ranges (1.0 x 10-8 M - 1.0 x 10-3 M for glucose, 1.0 x 10-8 M - 1.0 x 10-2 M for fructose and 1.0 x 10-10 M - 1.0 x 10-5 M for dextran). The limits of detection (LODs) were 0.8 nM for glucose, 0.6 nM for fructose, and 13 pM for dextran. These data were comparable to the others reported previously. In order to demonstrate glycoprotein detection with the same sensor, human immunoglobulin G (IgG) as well as horseradish peroxidase were used as model analytes. The sensor responded to IgG in the concentration range of 1.0 x 10-13 M - 1.0 x 10-7 M with a LOD value of 16 fM. The performance of the assay of peroxidase was compared to a spectrophotometric assay by determining the enzymatic activity of a captured analyte. The results showed that the method might be useful for label-free, fast, and sensitive detection of saccharides as well as glycoproteins over a wide concentration range.
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Affiliation(s)
- Gizem Ertürk Bergdahl
- CapSenze Biosystems AB, Scheelevägen 22, 22363 Lund, Sweden
- Department of Biotechnology, Kemicentum, Lund University, Sölvegatan 39A, 22100 Lund, Sweden
- Department of Clinical Sciences, Lund University, Tornavägen 10, 22184 Lund, Sweden
| | - Martin Hedström
- CapSenze Biosystems AB, Scheelevägen 22, 22363 Lund, Sweden
- Department of Biotechnology, Kemicentum, Lund University, Sölvegatan 39A, 22100 Lund, Sweden
| | - Bo Mattiasson
- CapSenze Biosystems AB, Scheelevägen 22, 22363 Lund, Sweden
- Department of Biotechnology, Kemicentum, Lund University, Sölvegatan 39A, 22100 Lund, Sweden
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Alizadeh Zeinabad H, Ghourchian H, Falahati M, Fathipour M, Azizi M, Boutorabi SM. Ultrasensitive interdigitated capacitance immunosensor using gold nanoparticles. NANOTECHNOLOGY 2018; 29:265102. [PMID: 29629877 DOI: 10.1088/1361-6528/aabca3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Immunosensors based on interdigitated electrodes (IDEs), have recently demonstrated significant improvements in the sensitivity of capacitance detection. Herein, a novel type of highly sensitive, compact and portable immunosensor based on a gold interdigital capacitor has been designed and developed for the rapid detection of hepatitis B surface antigen (HBsAg). To improve the efficiency of antibody immobilization and time-saving, a self-assembled monolayer (SAM) of 2-mercaptoethylamine film was coated on IDEs. Afterwards, carboxyl groups on primary antibodies were activated through 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and were immobilized on amino-terminated SAM for better control of the oriented immobilization of antibodies on gold IDEs. In addition, gold nanoparticles conjugated with a secondary antibody were used to enhance the sensitivity. Under optimal conditions, the immunosensor exhibited the sensitivity of 0.22 nF.pg ml-1, the linear range from 5 pg ml-1 to 1 ng ml-1 and the detection limit of 1.34 pg ml-1, at a signal-to-noise ratio of 3.
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Affiliation(s)
- Hojjat Alizadeh Zeinabad
- Laboratory of Bioanalysis, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran. MEMS & NEMS Lab, Department of Electrical and Computer Engineering, University of Tehran, Tehran, Iran. Department of Nanotechnology, Faculty of Advance Science and Technology, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
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Charmet J, Arosio P, Knowles TP. Microfluidics for Protein Biophysics. J Mol Biol 2018; 430:565-580. [DOI: 10.1016/j.jmb.2017.12.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 12/19/2017] [Accepted: 12/20/2017] [Indexed: 01/09/2023]
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Capacitive Biosensors and Molecularly Imprinted Electrodes. SENSORS 2017; 17:s17020390. [PMID: 28218689 PMCID: PMC5336051 DOI: 10.3390/s17020390] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 01/16/2017] [Accepted: 02/08/2017] [Indexed: 01/05/2023]
Abstract
Capacitive biosensors belong to the group of affinity biosensors that operate by registering direct binding between the sensor surface and the target molecule. This type of biosensors measures the changes in dielectric properties and/or thickness of the dielectric layer at the electrolyte/electrode interface. Capacitive biosensors have so far been successfully used for detection of proteins, nucleotides, heavy metals, saccharides, small organic molecules and microbial cells. In recent years, the microcontact imprinting method has been used to create very sensitive and selective biorecognition cavities on surfaces of capacitive electrodes. This chapter summarizes the principle and different applications of capacitive biosensors with an emphasis on microcontact imprinting method with its recent capacitive biosensor applications.
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Ertürk G, Hedström M, Mattiasson B. A sensitive and real-time assay of trypsin by using molecular imprinting-based capacitive biosensor. Biosens Bioelectron 2016; 86:557-565. [DOI: 10.1016/j.bios.2016.07.046] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 07/11/2016] [Accepted: 07/12/2016] [Indexed: 12/17/2022]
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Ertürk G, Hedström M, Tümer MA, Denizli A, Mattiasson B. Real-time prostate-specific antigen detection with prostate-specific antigen imprinted capacitive biosensors. Anal Chim Acta 2015; 891:120-9. [DOI: 10.1016/j.aca.2015.07.055] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 07/19/2015] [Accepted: 07/24/2015] [Indexed: 12/18/2022]
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Ertürk G, Berillo D, Hedström M, Mattiasson B. Microcontact-BSA imprinted capacitive biosensor for real-time, sensitive and selective detection of BSA. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2014; 3:65-72. [PMID: 28626651 PMCID: PMC5466099 DOI: 10.1016/j.btre.2014.06.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 06/19/2014] [Accepted: 06/19/2014] [Indexed: 11/28/2022]
Abstract
An analytical method is presented, combining novel microcontact imprinting technique and capacitive biosensor technology for the detection of BSA. Glass cover slips were used for preparation of protein stamps. The microcontact-BSA imprinted gold electrodes were prepared in the presence of methacrylic acid (MAA) and poly-ethylene glycol dimethacrylate (PEGDMA) as the cross-linker by bringing the protein stamp and the gold electrode into contact under UV-polymerization. Real-time BSA detection studies were performed in the concentration range of 1.0 × 10-20-1.0 × 10-8 M with a limit of detection (LOD) of 1.0 × 10-19 M. Cross-reactivity towards HSA and IgG were 5 and 3%, respectively. The electrodes were used for >70 assays during 2 months and retained their binding properties during all that time. The NIP (non-imprinted) electrode was used as a reference. The microcontact imprinting technology combined with the biosensor applications is a promising technology for future applications.
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Hybridization chain reaction performed on a metal surface as a means of signal amplification in SPR and electrochemical biosensors. Biosens Bioelectron 2014; 54:102-8. [DOI: 10.1016/j.bios.2013.10.036] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 10/01/2013] [Accepted: 10/22/2013] [Indexed: 11/23/2022]
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Lebogang L, Hedström M, Mattiasson B. Development of a real-time capacitive biosensor for cyclic cyanotoxic peptides based on Adda-specific antibodies. Anal Chim Acta 2014; 826:69-76. [PMID: 24793855 DOI: 10.1016/j.aca.2014.03.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 03/11/2014] [Accepted: 03/21/2014] [Indexed: 10/25/2022]
Abstract
The harmful effects of cyanotoxins in surface waters have led to increasing demands for accurate early warning methods. This study proposes a capacitive immunosensor for broad-spectrum detection of the group of toxic cyclic peptides called microcystins (∼80 congeners) at very low concentration levels. The novel analytical platform offers significant advances compared to the existing methods. Monoclonal antibodies (mAbs, clone AD4G2) that recognize a common element of microcystins were used to construct the biosensing layer. Initially, a stable insulating anchor layer for the mAbs was made by electropolymerization of tyramine onto a gold electrode surface, with subsequent incorporation of gold nanoparticles (AuNPs) on the glutaraldehyde (5%) activated polytyramine surface. The biosensor responded linearly to microcystin concentrations from 1×10(-13)M to 1×10(-10)M MC-LR standard with a limit of detection of 2.1×10(-14)M. The stability of the biosensor was evaluated by repeated measurements of the antigen and by determining the capacitance change relative to the original response, which decreased below 90% after the 30th cycle.
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Affiliation(s)
- Lesedi Lebogang
- Department of Biotechnology, Lund University, Box 124, 22100 Lund, Sweden
| | - Martin Hedström
- Department of Biotechnology, Lund University, Box 124, 22100 Lund, Sweden.
| | - Bo Mattiasson
- Department of Biotechnology, Lund University, Box 124, 22100 Lund, Sweden; CapSenze HB, Annersbergs gård 5520, 26021 Billeberga, Sweden
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12
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Capacitive sensing of microcystin variants of Microcystis aeruginosa using a gold immunoelectrode modified with antibodies, gold nanoparticles and polytyramine. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1199-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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13
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Kim JH, Chang YW, Bok E, Kim HJ, Lee H, Cho SN, Shin JS, Yoo KH. Detection of IFN-γ for latent tuberculosis diagnosis using an anodized aluminum oxide-based capacitive sensor. Biosens Bioelectron 2014; 51:366-70. [DOI: 10.1016/j.bios.2013.08.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 07/30/2013] [Accepted: 08/09/2013] [Indexed: 11/26/2022]
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Li S, Cui H, Yuan Q, Wu J, Wadhwa A, Eda S, Jiang H. AC electrokinetics-enhanced capacitive immunosensor for point-of-care serodiagnosis of infectious diseases. Biosens Bioelectron 2014; 51:437-43. [DOI: 10.1016/j.bios.2013.08.016] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/08/2013] [Accepted: 08/12/2013] [Indexed: 12/17/2022]
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15
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Luo X, Davis JJ. Electrical biosensors and the label free detection of protein disease biomarkers. Chem Soc Rev 2013; 42:5944-62. [DOI: 10.1039/c3cs60077g] [Citation(s) in RCA: 331] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Lai WA, Lin CH, Yang YS, Lu MSC. Ultrasensitive and label-free detection of pathogenic avian influenza DNA by using CMOS impedimetric sensors. Biosens Bioelectron 2012; 35:456-460. [PMID: 22425237 DOI: 10.1016/j.bios.2012.02.049] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Revised: 02/13/2012] [Accepted: 02/23/2012] [Indexed: 01/10/2023]
Abstract
This work presents miniaturized CMOS (complementary metal oxide semiconductor) sensors for non-faradic impedimetric detection of AIV (avian influenza virus) oligonucleotides. The signal-to-noise ratio is significantly improved by monolithic sensor integration to reduce the effect of parasitic capacitances. The use of sub-μm interdigitated microelectrodes is also beneficial for promoting the signal coupling efficiency. Capacitance changes associated with surface modification, functionalization, and DNA hybridization were extracted from the measured frequency responses based on an equivalent-circuit model. Hybridization of the AIV H5 capture and target DNA probes produced a capacitance reduction of -13.2 ± 2.1% for target DNA concentrations from 1 fM to 10 fM, while a capacitance increase was observed when H5 target DNA was replaced with non-complementary H7 target DNA. With the demonstrated superior sensing capabilities, this miniaturized CMOS sensing platform shows great potential for label-free point-of-care biosensing applications.
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Affiliation(s)
- Wei-An Lai
- Institute of Electronics Engineering, National Tsing Hua University, Hsinchu 300, Taiwan, ROC
| | - Chih-Heng Lin
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan, ROC
| | - Yuh-Shyong Yang
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan, ROC
| | - Michael S-C Lu
- Department of Electrical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan, ROC; Institute of Electronics Engineering, National Tsing Hua University, Hsinchu 300, Taiwan, ROC; Institute of NanoEngineering and Microsystems, National Tsing Hua University, Hsinchu 300, Taiwan, ROC.
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Caballero D, Martinez E, Bausells J, Errachid A, Samitier J. Impedimetric immunosensor for human serum albumin detection on a direct aldehyde-functionalized silicon nitride surface. Anal Chim Acta 2012; 720:43-8. [PMID: 22365119 DOI: 10.1016/j.aca.2012.01.031] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 01/14/2012] [Accepted: 01/17/2012] [Indexed: 10/14/2022]
Abstract
In this work we report the fabrication and characterization of a label-free impedimetric immunosensor based on a silicon nitride (Si(3)N(4)) surface for the specific detection of human serum albumin (HSA) proteins. Silicon nitride provides several advantages compared with other materials commonly used, such as gold, and in particular in solid-state physics for electronic-based biosensors. However, few Si(3)N(4)-based biosensors have been developed; the lack of an efficient and direct protocol for the integration of biological elements with silicon-based substrates is still one of its the main drawbacks. Here, we use a direct functionalization method for the direct covalent binding of monoclonal anti-HSA antibodies on an aldehyde-functionalized Si-p/SiO(2)/Si(3)N(4) structure. This methodology, in contrast with most of the protocols reported in literature, requires less chemical reagents, it is less time-consuming and it does not need any chemical activation. The detection capability of the immunosensor was tested by performing non-faradaic electrochemical impedance spectroscopy (EIS) measurements for the specific detection of HSA proteins. Protein concentrations within the linear range of 10(-13)-10(-7) M were detected, showing a sensitivity of 0.128 Ω μM(-1) and a limit of detection of 10(-14) M. The specificity of the sensor was also addressed by studying the interferences with a similar protein, bovine serum albumin. The results obtained show that the antibodies were efficiently immobilized and the proteins detected specifically, thus, establishing the basis and the potential applicability of the developed silicon nitride-based immunosensor for the detection of proteins in real and more complex samples.
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Affiliation(s)
- David Caballero
- Nanobioengineering group-IBEC, Barcelona Science Park, C/ Baldiri Reixach 10-12, 08028 Barcelona, Spain.
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Capacitive immunosensor for the detection of host cell proteins. J Biotechnol 2012; 157:207-13. [DOI: 10.1016/j.jbiotec.2011.11.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Revised: 10/31/2011] [Accepted: 11/02/2011] [Indexed: 11/17/2022]
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Dawan S, Kanatharana P, Wongkittisuksa B, Limbut W, Numnuam A, Limsakul C, Thavarungkul P. Label-free capacitive immunosensors for ultra-trace detection based on the increase of immobilized antibodies on silver nanoparticles. Anal Chim Acta 2011; 699:232-41. [DOI: 10.1016/j.aca.2011.05.038] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 05/17/2011] [Accepted: 05/24/2011] [Indexed: 10/18/2022]
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Arya SK, Bhansali S. Lung Cancer and Its Early Detection Using Biomarker-Based Biosensors. Chem Rev 2011; 111:6783-809. [DOI: 10.1021/cr100420s] [Citation(s) in RCA: 196] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Sunil K. Arya
- Bio-MEMS and Microsystem Lab, Department of Electrical Engineering, University of South Florida, 4202 East Fowler Avenue, ENB 118, Tampa, Florida 33620, United States
| | - Shekhar Bhansali
- Bio-MEMS and Microsystem Lab, Department of Electrical Engineering, University of South Florida, 4202 East Fowler Avenue, ENB 118, Tampa, Florida 33620, United States
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Samanman S, Kanatharana P, Chotigeat W, Deachamag P, Thavarungkul P. Highly sensitive capacitive biosensor for detecting white spot syndrome virus in shrimp pond water. J Virol Methods 2011; 173:75-84. [PMID: 21256870 DOI: 10.1016/j.jviromet.2011.01.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 12/21/2010] [Accepted: 01/10/2011] [Indexed: 10/18/2022]
Abstract
Water is one major pathways by which the white spot syndrome virus (WSSV) pathogen enters aquaculture facilities. This paper describes the production and use of a capacitive biosensor for the quantitative detection of as little as 1copy/μl of WSSV in shrimp pond water. A glutathione-S-transferase tag for white spot binding protein (GST-WBP) was immobilized on a gold electrode through a self-assembled monolayer. Binding between WSSV and the immobilized GST-WBP was directly detected by a capacitance measurement. Under optimum conditions, the capacitive biosensor detected WSSV over a wide linear range of between 1 and 1 × 10(5)copies/μl. The system was highly selective for WSSV. One analysis cycle required only 20-25 min of analysis time and 25 min of regeneration time. The capacitive biosensor was applied to analyze WSSV concentration in eight shrimp pond water samples and the results were in good agreement with those obtained by a real time quantitative polymerase chain reaction (real-time PCR) method (P>0.05). The immobilized GST-WBP provided and could be reused for up to 39 analysis cycles for one electrode preparation with a relative standard deviation (RSD) of 2.4% and a good reproducibility of residual activity (95.8 ± 2.3%). The appealing performance of this biosensor indicated that it had great potential for an accurate very sensitive, quantitative, detection method for WSSV.
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Affiliation(s)
- Saluma Samanman
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
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Development and application of a real-time capacitive sensor. Biosens Bioelectron 2011; 26:2466-72. [DOI: 10.1016/j.bios.2010.10.033] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Revised: 10/12/2010] [Accepted: 10/21/2010] [Indexed: 02/03/2023]
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Abstract
Accurate HIV diagnostic testing continues to pose challenges, but there are also opportunities for assay performance improvements in key areas for specific intended-use settings. The genetic diversity of HIV can result in false and discordant results in assays that fail to detect new variant strains. The use of antiretroviral therapies has resulted in drug-resistant variants that require monitoring by sequencing and genotyping methods. Nucleic acid testing is the most sensitive and reliable platform for detection, but it is costly and limited to centralized testing facilities, making implementation difficult in resource-limited settings where HIV has hit the hardest. Rapid antibody tests suitable for point-of-care use are becoming more accessible in resource-limited settings, but these tests may not detect HIV during the acute infection stage. Emerging antigen/antibody combination assays are viable alternatives to nucleic acid testing for diagnosis of recent infections. Although patient monitoring (e.g., via CD4+ T-cell count and viral load determination) and infant diagnoses still rely on clinical laboratory-based testing, point-of-care options are being developed. There are other technical challenges to HIV diagnostic testing and emerging biodetection technologies that may be able to address them, but they are not yet proven.
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Affiliation(s)
- Eric Y Wong
- Laboratory of Molecular Virology, Center for Biologics Evaluation & Research, Food & Drug Administration, 8800 Rockville Pike, Building 29B, Room 4NN16, Bethesda, MD 20892, USA
| | - Indira K Hewlett
- Laboratory of Molecular Virology, Center for Biologics Evaluation & Research, Food & Drug Administration, 8800 Rockville Pike, Building 29B, Room 4NN16, Bethesda, MD 20892, USA
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Kang B, Yeo U, Yoo KH. Anodized aluminum oxide-based capacitance sensors for the direct detection of DNA hybridization. Biosens Bioelectron 2010; 25:1592-6. [DOI: 10.1016/j.bios.2009.11.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Revised: 11/11/2009] [Accepted: 11/17/2009] [Indexed: 10/20/2022]
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25
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Adsorption kinetics of proteins in plastic microfluidic channels: Real-time monitoring of lysozyme adsorption by pulsed streaming potentials. Biosens Bioelectron 2010; 25:1539-43. [DOI: 10.1016/j.bios.2009.11.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2009] [Revised: 10/17/2009] [Accepted: 11/02/2009] [Indexed: 11/21/2022]
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Loyprasert S, Hedström M, Thavarungkul P, Kanatharana P, Mattiasson B. Sub-attomolar detection of cholera toxin using a label-free capacitive immunosensor. Biosens Bioelectron 2010; 25:1977-83. [PMID: 20167466 DOI: 10.1016/j.bios.2010.01.020] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Revised: 12/28/2009] [Accepted: 01/15/2010] [Indexed: 11/26/2022]
Abstract
A label-free immunosensor for the direct detection of cholera toxin (CT) at sub-attomolar level has been developed based on potential-step capacitance measurements. Anti-CT antibody was adsorbed on gold nanoparticles (AuNPs) incorporated on a polytyramine-modified gold electrode. The concentration of CT was determined by detecting the change of capacitance caused by the formation of antibody-antigen complexes. By using AuNPs adsorbed to the sensing surface, the signal was dramatically increased leading to a significantly more sensitive assay. In fact, under optimum conditions the immunosensor could detect CT concentration with a limit of detection of 9 x 10(-20)M or 0.09 aM, with a dynamic range between 0.1 aM and 10 pM. Good analytical reproducibility could be obtained by injecting CT up to 36 times with an RSD of 2.5%. In addition, good performance of the developed immunosensor was achieved when applied to turbid water samples collected from a local stream that were spiked with CT.
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Affiliation(s)
- S Loyprasert
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
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Mattiasson B, Teeparuksapun K, Hedström M. Immunochemical binding assays for detection and quantification of trace impurities in biotechnological production. Trends Biotechnol 2009; 28:20-7. [PMID: 19896744 DOI: 10.1016/j.tibtech.2009.10.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 09/15/2009] [Accepted: 10/08/2009] [Indexed: 11/29/2022]
Abstract
New, highly sensitive, biosensor concepts make it possible to assay biomacromolecules at concentrations that previously were far below the limit of detection. The previous generation of assays used in quality control situations during biotechnological production was designed primarily for monitoring target molecules, which typically appeared in high concentrations. Hence, novel analytical techniques with high sensitivity should become increasingly important in meeting the demands from regulatory agencies with regard to declaring levels of impurities in biopharmaceuticals. Such techniques also open up opportunities for a range of other challenging measurements, for example, in the area of biohazards. This review describes the development of immuno-based biosensors and exemplifies these by presenting analyses of common impurities in biopharmaceutical production.
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Affiliation(s)
- Bo Mattiasson
- Department of Biotechnology, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
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28
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Label free capacitive immunosensor for detecting calpastatin — A meat tenderness biomarker. Bioelectrochemistry 2009; 76:93-9. [DOI: 10.1016/j.bioelechem.2009.06.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 05/27/2009] [Accepted: 06/04/2009] [Indexed: 11/21/2022]
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29
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Teeparuksapun K, Kanatharana P, Limbut W, Thammakhet C, Asawatreratanakul P, Mattiasson B, Wongkittisuksa B, Limsakul C, Thavarungkul P. Disposable Electrodes for Capacitive Immunosensor. ELECTROANAL 2009. [DOI: 10.1002/elan.200804517] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Capacitive biosensor for quantification of trace amounts of DNA. Biosens Bioelectron 2009; 24:2559-65. [DOI: 10.1016/j.bios.2009.01.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2008] [Revised: 01/06/2009] [Accepted: 01/06/2009] [Indexed: 11/20/2022]
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31
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Labib M, Hedström M, Amin M, Mattiasson B. A capacitive biosensor for detection of staphylococcal enterotoxin B. Anal Bioanal Chem 2008; 393:1539-44. [DOI: 10.1007/s00216-008-2559-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2008] [Revised: 11/06/2008] [Accepted: 12/01/2008] [Indexed: 10/21/2022]
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32
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Loyprasert S, Thavarungkul P, Asawatreratanakul P, Wongkittisuksa B, Limsakul C, Kanatharana P. Label-free capacitive immunosensor for microcystin-LR using self-assembled thiourea monolayer incorporated with Ag nanoparticles on gold electrode. Biosens Bioelectron 2008; 24:78-86. [DOI: 10.1016/j.bios.2008.03.016] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Revised: 03/18/2008] [Accepted: 03/18/2008] [Indexed: 11/15/2022]
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33
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Lisdat F, Schäfer D. The use of electrochemical impedance spectroscopy for biosensing. Anal Bioanal Chem 2008; 391:1555-67. [PMID: 18414837 DOI: 10.1007/s00216-008-1970-7] [Citation(s) in RCA: 439] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2007] [Revised: 02/08/2008] [Accepted: 02/09/2008] [Indexed: 11/30/2022]
Abstract
This review introduces the basic concepts and terms associated with impedance and techniques of measuring impedance. The focus of this review is on the application of this transduction method for sensing purposes. Examples of its use in combination with enzymes, antibodies, DNA and with cells will be described. Important fields of application include immune and nucleic acid analysis. Special attention is devoted to the various electrode design and amplification schemes developed for sensitivity enhancement. Electrolyte insulator semiconductor (EIS) structures will be treated separately.
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Affiliation(s)
- F Lisdat
- Biosystems Technology, Wildau University of Applied Sciences, 15745, Wildau, Germany.
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34
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Limbut W, Hedström M, Thavarungkul P, Kanatharana P, Mattiasson B. Capacitive biosensor for detection of endotoxin. Anal Bioanal Chem 2007; 389:517-25. [PMID: 17915336 DOI: 10.1007/s00216-007-1443-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A capacitive biosensor for the detection of bacterial endotoxin has been developed. Endotoxin-neutralizing protein derived from American horseshoe crab was immobilized to a self-assembled thiol layer on a biosensor transducer (Au). Upon injection of a sample containing endotoxin, a decrease in the observed capacitive signal was registered. Endotoxin could be determined under optimum conditions with a detection limit of 1.0 x 10(-13) M and linearity ranging from 1.0 x 10(-13) to 1.0 x 10(-10) M. Good agreement was achieved when applying endotoxin preparations purified from an Escherichia coli cultivation to the capacitive biosensor system, utilizing the conventional method for quantitative endotoxin determination, the Limulus amebocyte lysate test as a reference. The capacitive biosensor method was statistically tested with the Wilcoxon signed rank test, which proved the system is acceptable for the quantitative analysis of bacterial endotoxin (P<0.05).
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Affiliation(s)
- Warakorn Limbut
- Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Box 124, 221 00, Lund, Sweden
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35
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Daniels JS, Pourmand N. Label-Free Impedance Biosensors: Opportunities and Challenges. ELECTROANAL 2007; 19:1239-1257. [PMID: 18176631 PMCID: PMC2174792 DOI: 10.1002/elan.200603855] [Citation(s) in RCA: 685] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2006] [Accepted: 03/20/2007] [Indexed: 11/05/2022]
Abstract
Impedance biosensors are a class of electrical biosensors that show promise for point-of-care and other applications due to low cost, ease of miniaturization, and label-free operation. Unlabeled DNA and protein targets can be detected by monitoring changes in surface impedance when a target molecule binds to an immobilized probe. The affinity capture step leads to challenges shared by all label-free affinity biosensors; these challenges are discussed along with others unique to impedance readout. Various possible mechanisms for impedance change upon target binding are discussed. We critically summarize accomplishments of past label-free impedance biosensors and identify areas for future research.
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Affiliation(s)
- Jonathan S. Daniels
- Stanford Genome Technology Center; 855 S. California Ave., Palo Alto, CA 94304, USA
- Stanford Center for Integrated Systems; 420 Via Palou, Stanford, CA 94305, USA
| | - Nader Pourmand
- Stanford Genome Technology Center; 855 S. California Ave., Palo Alto, CA 94304, USA
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Limbut W, Kanatharana P, Mattiasson B, Asawatreratanakul P, Thavarungkul P. A comparative study of capacitive immunosensors based on self-assembled monolayers formed from thiourea, thioctic acid, and 3-mercaptopropionic acid. Biosens Bioelectron 2006; 22:233-40. [PMID: 16460923 DOI: 10.1016/j.bios.2005.12.025] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2005] [Revised: 12/13/2005] [Accepted: 12/20/2005] [Indexed: 10/25/2022]
Abstract
A procedure was developed for the covalent coupling of anti-alpha-fetoprotein antibody (anti-AFP) to a gold surface modified with a self-assembled monolayer (SAM) of thiourea (TU). The performance of the SAM-antibody layer was compared to those of similar layers based on thioctic acid (TA) and 3-mercaptopropionic acid (MPA) by using flow injection capacitive immunosensor system. Covalent coupling of anti-AFP on self-assembled thiourea monolayer (SATUM) modified gold electrode can be used to detect alpha-fetoprotein with high efficiency, similar sensitivity, the same linear range (0.01-10 microgl(-1)) and detection limit (10 ngl(-1)) as those obtained from sensors based on self-assembled thioctic acid monolayer (SATAM) and self-assembled 3-mercaptopropionic acid monolayer (SAMPAM). The system is specific for alpha-fetoprotein and can be regenerated and reused up to 48 times. Therefore, self-assembled monolayer using thiourea which is cheaper than thioctic acid and 3-mercaptopropionic acid is a good alternative for biosensor applications when SAMs are used.
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Affiliation(s)
- Warakorn Limbut
- Biophysics Research Unit, Biosensors and Biocurrents, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
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37
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Limbut W, Kanatharana P, Mattiasson B, Asawatreratanakul P, Thavarungkul P. A reusable capacitive immunosensor for carcinoembryonic antigen (CEA) detection using thiourea modified gold electrode. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.01.021] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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