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Shan CW, Chen Z, Han GC, Feng XZ, Kraatz HB. Electrochemical immuno-biosensors for the detection of the tumor marker alpha-fetoprotein: A review. Talanta 2024; 271:125638. [PMID: 38237279 DOI: 10.1016/j.talanta.2024.125638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 11/27/2023] [Accepted: 01/05/2024] [Indexed: 02/24/2024]
Abstract
Alpha-fetoprotein (AFP) is a glycoprotein that has many important physiological functions, including transportation, immunosuppression, and induction of apoptosis by T lymphocytes. AFP is closely related to the development of hepatocellular carcinoma and many kinds of tumors, all of which can show high concentrations, so it is used as a positive test indicator for many kinds of tumors. This paper reviews recent advances in the detection of the tumor marker AFP based on three immuno-biosensors: electrochemical (EC), photoelectrochemical (PEC), and electrochemical luminescence (ECL). The electrodes are modified by different materials or homemade composites, different signaling molecules are selected as single probes or dual probes for the detection of AFP. The detection limit was as low as 3 fg/mL, which indicated that the AFP immunosensor had achieved highly sensitive detection. In addition, we also reviewed and summarized the current development status and application prospect of AFP immunoelectrochemical sensors. There are not too many researches on immunosensors based on dual-signal ratios, and the commonly used probes are methylene blue (MB) and ferrocene (Fc). It would be more innovative to have more novel signaling molecules as probes to prepare dual-signal ratio sensors.
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Affiliation(s)
- Chen-Wei Shan
- School of Life and Environmental Sciences, Guangxi Human Physiological Information Non Invasive Detection Engineering Technology Research Center, Guangxi Colleges and Universities Key Laboratory of Biomedical Sensors and Intelligent Instruments, Guilin University of Electronic Technology, Guilin, 541004, PR China
| | - Zhencheng Chen
- School of Life and Environmental Sciences, Guangxi Human Physiological Information Non Invasive Detection Engineering Technology Research Center, Guangxi Colleges and Universities Key Laboratory of Biomedical Sensors and Intelligent Instruments, Guilin University of Electronic Technology, Guilin, 541004, PR China
| | - Guo-Cheng Han
- School of Life and Environmental Sciences, Guangxi Human Physiological Information Non Invasive Detection Engineering Technology Research Center, Guangxi Colleges and Universities Key Laboratory of Biomedical Sensors and Intelligent Instruments, Guilin University of Electronic Technology, Guilin, 541004, PR China.
| | - Xiao-Zhen Feng
- School of Life and Environmental Sciences, Guangxi Human Physiological Information Non Invasive Detection Engineering Technology Research Center, Guangxi Colleges and Universities Key Laboratory of Biomedical Sensors and Intelligent Instruments, Guilin University of Electronic Technology, Guilin, 541004, PR China.
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1065 Military Trail, Toronto, Ontario, M1C 1A4, Canada.
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Yan Q, Wu R, Wang J, Mao J, Nan W. Detection of tumor marker CA72-4 with an electrochemical immunosensor based on MnO 2 nanosheets and HNM-AuPtPd nanocomposites. Mikrochim Acta 2024; 191:239. [PMID: 38570399 DOI: 10.1007/s00604-024-06266-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 02/17/2024] [Indexed: 04/05/2024]
Abstract
To accurately detect tumor marker carbohydrate antigen 72-4 (CA72-4) of serum samples is of great significance for the early diagnosis of malignant tumors. In the present study, MnO2/hollow nanobox metal-organic framework (HNM)-AuPtPd nanocomposites were prepared via multi-step synthesis and superposition method and a series of characterizations were carried out. A highly sensitive immunosensor Ab/MnO2/HNM-AuPtPd/GCE based on the composite nanomaterial was further prepared and used to detect the tumor marker CA72-4. The constructed immunosensor achieved signal amplification by increasing the electrocatalytic activity to H2O2 by means of the synergistic effect of MnO2 ultra-thin nanosheets (MnO2 UNs) and HNM-AuPtPd. At the same time, the electrochemical properties of the immunosensor were analyzed using cyclic voltammetry, electrochemical impedance, amperometry (with the test voltage of -0.4 V), and differential pulse voltammetry. The experimental results showed that the MnO2/HNM-AuPtPd nanocomposites were successfully prepared, and the immunosensor Ab/MnO2/HNM-AuPtPd/GCE demonstrated an excellent electrochemical performance. The electrochemical immunosensor had the highest detection sensitivity under the optimal experimental conditions, such as incubation pH of 7.0, incubation time of 60 min, with the addition of 15 μL of H2O2, and in the concentration range 0.001-500 U/mL. It had a low detection limit of 1.78×10-5 U/mL (S/N = 3). Moreover, the serum sample recovery were in the range from 99.38 to 100.52%. This study provides a new method and experimental basis for the detection of tumor markers in clinical practice.
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Affiliation(s)
- Qinghua Yan
- The Key Laboratory of Biomedical Material, School of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, China.
| | - Ruixue Wu
- The Key Laboratory of Biomedical Material, School of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, China
| | - Jiaxin Wang
- The Key Laboratory of Biomedical Material, School of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, China
| | - Jian Mao
- The Key Laboratory of Biomedical Material, School of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, China
| | - Wenbin Nan
- The Key Laboratory of Biomedical Material, School of Life Science and Technology, Xinxiang Medical University, Xinxiang, 453003, China
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Disposable label-free electrochemical immunosensor based on prussian blue nanocubes for four breast cancer tumor markers. Talanta 2023; 255:124229. [PMID: 36641867 DOI: 10.1016/j.talanta.2022.124229] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/21/2022] [Accepted: 12/26/2022] [Indexed: 12/31/2022]
Abstract
A compact and low-cost multi-electrode array (MEA) is presented, comprising four working electrodes with shared reference and auxiliary electrodes. Prussian blue was electrodeposited on the MEA using chronoamperometry with a positive potential of 0.3 V. Prussian blue nanocubes (PBNCs) were formed, which were observed using scanning electron microscopy. The precision of the four working electrodes was demonstrated using ferric/ferro cyanide (RSD <5.8%). The surface roughness of the working electrodes of the fabricated MEA was investigated by atomic force microscopy and compared with that of a commercial MEA. The PBNCs were the platform for a label-free immunosensor that detected four breast cancer tumor markers (CEA, CA125, CA153, and CA199) using specific antibodies. The processes of antibody immobilization were investigated using cyclic voltammetry and electrochemical impedance spectroscopy. The immunosensor was evaluated using real human serum samples, yielding acceptable recoveries (95.1-104.1%, RSD < 3.9) for the four tumor markers. These findings confirmed that our label-free immunosensor based on PBNCs could be a promising device for point-of-care testing and could pave the way for the establishment of new platforms for the screening of various breast cancer tumor markers.
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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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Demuru S, Kim J, El Chazli M, Bruce S, Dupertuis M, Binz PA, Saubade M, Lafaye C, Briand D. Antibody-Coated Wearable Organic Electrochemical Transistors for Cortisol Detection in Human Sweat. ACS Sens 2022; 7:2721-2731. [PMID: 36054907 DOI: 10.1021/acssensors.2c01250] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The dysregulation of the hormone cortisol is related to several pathological states, and its monitoring could help prevent severe stress, fatigue, and mental diseases. While wearable antibody-based biosensors could allow real-time and simple monitoring of antigens, an accurate and low-cost antibody-based cortisol detection through electrochemical methods is considerably challenging due to its low concentration and the high ionic strength of real biofluids. Here, a label-free and fast sensor for cortisol detection is proposed based on antibody-coated organic electrochemical transistors. The developed devices show unprecedented high sensitivities of 50 μA/dec for cortisol sensing in high-ionic-strength solutions with effective cortisol detection demonstrated with real human sweat. The sensing mechanism is analyzed through impedance spectroscopy and confirmed with electrical models. Compared to existing methods requiring bulky and expensive laboratory equipment, these wearable devices enable point-of-care cortisol detection in 5 min with direct sweat collection for personalized well-being monitoring.
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Affiliation(s)
- Silvia Demuru
- School of Engineering, Ecole Polytechnique Fédérale de Lausanne, Neuchâtel 2000, Switzerland
| | - Jaemin Kim
- School of Engineering, Ecole Polytechnique Fédérale de Lausanne, Neuchâtel 2000, Switzerland
| | - Marwan El Chazli
- School of Engineering, Ecole Polytechnique Fédérale de Lausanne, Neuchâtel 2000, Switzerland
| | - Stephen Bruce
- Clinical Chemistry Laboratory, Centre Hospitalier Universitaire Vaudois, Lausanne 1011, Switzerland
| | - Michael Dupertuis
- Clinical Chemistry Laboratory, Centre Hospitalier Universitaire Vaudois, Lausanne 1011, Switzerland
| | - Pierre-Alain Binz
- Clinical Chemistry Laboratory, Centre Hospitalier Universitaire Vaudois, Lausanne 1011, Switzerland
| | - Mathieu Saubade
- Sports Medicine Unit, Centre Hospitalier Universitaire Vaudois, Lausanne 1011, Switzerland
| | - Céline Lafaye
- Sports Medicine Unit, Centre Hospitalier Universitaire Vaudois, Lausanne 1011, Switzerland
| | - Danick Briand
- School of Engineering, Ecole Polytechnique Fédérale de Lausanne, Neuchâtel 2000, Switzerland
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Barhoum A, J Forster R. Label-free electrochemical immunosensor for picomolar detection of the cervical cancer biomarker MCM5. Anal Chim Acta 2022; 1225:340226. [PMID: 36038236 DOI: 10.1016/j.aca.2022.340226] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/28/2022] [Accepted: 07/31/2022] [Indexed: 01/15/2023]
Abstract
An immunosensor for label-free electrochemical detection of MiniChromosome Maintenance Protein 5, MCM5, a protein overexpressed in cervical cancer, based on a gold electrode is reported. The electrode was first modified with a submonolayer (capture layer) of 11-mercaptoundecanoic acid (11-MUA) and then activated with N-(3-dimethylaminopropyl)-N-ethylcarbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) to immobilize the capture antibody. The change in electrode surface properties (wettability) during the formation of the 11-MUA layers was determined using the static water contact angle (WCA). The binding of MCM5 antigens to the capture antibody was monitored by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) using 5 mM [Fe(CN)6]3-/4- in 0.1 M LiClO4(aq) as an electroactive probe. AC Impedance was used to measure charge transfer resistance (Rct), which reflects impeded electron transfer when the antigen is bound to the antibody functionalized surface. After exposing the antibody-functionalized surface to MCM5 antigens, Rct increases linearly with the logarithmic value of MCM5 antigen concentration, with a linear dynamic range of 10-6 to 10-11 g/mL, a correlation coefficient of 0.99, and a detection limit of 2.9 pM (10-11 g/mL). This excellent sensitivity was achieved with simple preparation steps and minimal reagent consumption, without the need for complicated procedures such as enzymatic amplification, fluorescent labeling, or nanoparticle modification.
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Affiliation(s)
- Ahmed Barhoum
- National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin, D09 V209, Ireland.
| | - Robert J Forster
- National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin, D09 V209, Ireland
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Wu H, Saito Y, Yoshizaki G, Yoshiura Y, Ohnuki H, Endo H. Study on the development of carbon nanotube enhanced biosensor for gender determination of fish. SENSING AND BIO-SENSING RESEARCH 2022. [DOI: 10.1016/j.sbsr.2022.100474] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Atta NF, Galal A, El-Gohary AR. Electrochemical sensing of dobutamine, paracetamol, amlodipine, and daclatasvir in serum based on thiourea SAMs over nano-gold particles-CNTs composite. NEW J CHEM 2022. [DOI: 10.1039/d2nj01822e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report in this work a one-step approach for the formation of self-assembled monolayers (SAMs) from thiourea (TU) over gold nanoparticles dispersed in carbon nanotubes (CNTs-Aunano). The fabrication of the...
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Mahadhy A, Mattiasson B, StåhlWernersson E, Hedström M. Evaluation of Polytyramine Film and 6-Mercaptohexanol Self-Assembled Monolayers as the Immobilization Layers for a Capacitive DNA Sensor Chip: A Comparison. SENSORS 2021; 21:s21238149. [PMID: 34884153 PMCID: PMC8662409 DOI: 10.3390/s21238149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/30/2021] [Accepted: 12/01/2021] [Indexed: 11/16/2022]
Abstract
The performance of a biosensor is associated with the properties of an immobilization layer on a sensor chip. In this study, gold sensor chips were modified with two different immobilization layers, polytyramine film and 6-mercaptohexanol self-assembled monolayer. The physical, electrochemical and analytical properties of polytyramine film and mercaptohexanol self-assembled monolayer modified gold sensor chips were studied and compared. The study was conducted using atomic force microscopy, cyclic voltammetry and a capacitive DNA-sensor system (CapSenze™ Biosystem). The results obtained by atomic force microscopy and cyclic voltammetry indicate that polytyramine film on the sensor chip surface possesses better insulating properties and provides more spaces for the immobilization of the capture probe than a mercaptohexanol self-assembled monolayer. A capacitive DNA sensor hosting a polytyramine single-stranded DNA-modified sensor chip displayed higher sensitivity and larger signal amplitude than that of a mercaptohexanol single-stranded DNA-modified sensor chip. The linearity responses for polytyramine single-stranded DNA- and mercaptohexanol single-stranded DNA-modified sensor chips were obtained at log concentration ranges, equivalent to 10-12 to 10-8 M and 10-10 to 10-8 M, with detection limits of 4.0 × 10-13 M and 7.0 × 10-11 M of target complementary single-stranded DNA, respectively. Mercaptohexanol single-stranded DNA- and polytyramine single-stranded DNA-modified sensor chips exhibited a notable selectivity at an elevated hybridization temperature of 50 °C, albeit the signal amplitudes due to the hybridization of the target complementary single-stranded DNA were reduced by almost 20% and less than 5%, respectively.
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Affiliation(s)
- Ally Mahadhy
- Department of Biotechnology, Lund University, 22100 Lund, Sweden; (A.M.); (E.S.); (M.H.)
- Department of Molecular Biology and Biotechnology, University of Dar es Salaam, Dar es Salaam 16103, Tanzania
| | - Bo Mattiasson
- Department of Biotechnology, Lund University, 22100 Lund, Sweden; (A.M.); (E.S.); (M.H.)
- CapSenze Biosystem AB, Värmö 5520, 26873 Billeberga, Sweden
- Correspondence: ; Tel.: +46-46-222-8264 or +46-70-605-9830
| | - Eva StåhlWernersson
- Department of Biotechnology, Lund University, 22100 Lund, Sweden; (A.M.); (E.S.); (M.H.)
| | - Martin Hedström
- Department of Biotechnology, Lund University, 22100 Lund, Sweden; (A.M.); (E.S.); (M.H.)
- CapSenze Biosystem AB, Värmö 5520, 26873 Billeberga, Sweden
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Atta NF, Galal A, El-Gohary AR. Novel method of one pot preparation of thiourea self-assembled monolayers over gold nanoparticles-carbon nanotubes composite for sensing application of phenolic compounds. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Electrochemical Immunosensor for the Early Detection of Rheumatoid Arthritis Biomarker: Anti-Cyclic Citrullinated Peptide Antibody in Human Serum Based on Avidin-Biotin System. SENSORS 2020; 21:s21010124. [PMID: 33379138 PMCID: PMC7795521 DOI: 10.3390/s21010124] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/21/2020] [Accepted: 12/24/2020] [Indexed: 12/19/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune disease that produces a progressive inflammatory response that leads to severe pain, swelling, and stiffness in the joints of hands and feet, followed by irreversible damage of the joints. The authors developed a miniaturized, label-free electrochemical impedimetric immunosensor for the sensitive and direct detection of arthritis Anti-CCP-ab biomarker. An interdigitated-chain-shaped microelectrode array (ICE) was fabricated by taking the advantage of microelectromechanical systems. The fabricated ICE was modified with a self-assembled monolayer (SAM) of Mercaptohexanoic acid (MHA) for immobilization of the synthetic peptide bio-receptor (B-CCP). The B-CCP was attached onto the surface of SAM modified ICE through a strong avidin-biotin bio-recognition system. The modified ICE surface with the SAM and bio-molecules (Avidin, B-CCP, Anti-CCP-ab and BSA) was morphologically and electrochemically characterized. The change in the sensor signal upon analyte binding on the electrode surface was probed through the electrochemical impedance spectroscopy (EIS) property of charge-transfer resistance (Rct) of the modified electrodes. EIS measurements were target specific and the sensor response was linearly increased with step wise increase in target analyte (Anti-CCP-ab) concentrations. The developed sensor showed a linear range for the addition of Anti-CCP-ab between 1 IU mL−1 → 800 IU mL−1 in phosphate buffered saline (PBS) and Human serum (HS), respectively. The sensor showed a limit of detection of 0.60 IU mL−1 and 0.82 IU mL−1 in the PBS and HS, respectively. The develop bio-electrode showed a good reproducibility (relative standard deviation (RSD), 1.52%), selectivity and stability (1.5% lost at the end of 20th day) with an acceptable recovery rate (98.0% → 101.18%) and % RSD’s for the detection of Anti-CCP-ab in spiked HS samples.
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Latest developments in non-faradic impedimetric biosensors: Towards clinical applications. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.116073] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Phal S, Shimizu K, Mwanza D, Mashazi P, Shchukarev A, Tesfalidet S. Electrografting of 4-Carboxybenzenediazonium on Glassy Carbon Electrode: The Effect of Concentration on the Formation of Mono and Multilayers. Molecules 2020; 25:E4575. [PMID: 33036378 PMCID: PMC7582525 DOI: 10.3390/molecules25194575] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 09/26/2020] [Accepted: 10/03/2020] [Indexed: 11/25/2022] Open
Abstract
Grafting of electrodes with diazonium salts using cyclic voltammetry (CV) is a well-established procedure for surface modification. However, little is known about the effect of the concentration of the diazonium salt on the number of layers grafted on the electrode surface. In this work, the impact of concentration on the grafting of 4-carboxybenzenediazonium (4-CBD) onto a glassy carbon electrode (GCE) is elucidated. The number of layers grafted on the GCE was linearly dependent on the concentration of 4-CBD and varied between 0.9 and 4.3 when the concentration was varied between 0.050 and 0.30 mmol/L at 0.10 V.s-1. Characterization of modified glassy carbon surface with X-ray photoelectron spectroscopy (XPS) confirmed the grafting of carboxyphenyl layer on the surface. Grafting with 0.15 mmol/L 4-CBD (1 CV cycle) did not form a detectable amount of carboxyphenyl (CP) moieties at the surface, while a single scan with higher concentration (2.5 mmol/L) or multiple scans (22 cycles) gave detectable signals, indicating formation of multilayers. We also demonstrate the possibility of removing the thin layer grafted on a glassy carbon electrode by applying high oxidation potential +1.40 V.
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Affiliation(s)
- Sereilakhena Phal
- Department of Chemistry, Umeå University, SE 90187 Umeå, Sweden; (S.P.); (K.S.); (A.S.)
| | - Kenichi Shimizu
- Department of Chemistry, Umeå University, SE 90187 Umeå, Sweden; (S.P.); (K.S.); (A.S.)
| | - Daniel Mwanza
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa; (D.M.); (P.M.)
| | - Philani Mashazi
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa; (D.M.); (P.M.)
- Institute for Nanotechnology Innovation Centre, Rhodes University, Grahamstown 6140, South Africa
| | - Andrey Shchukarev
- Department of Chemistry, Umeå University, SE 90187 Umeå, Sweden; (S.P.); (K.S.); (A.S.)
| | - Solomon Tesfalidet
- Department of Chemistry, Umeå University, SE 90187 Umeå, Sweden; (S.P.); (K.S.); (A.S.)
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Manny TF, Miah R, Islam F, Sen D, Mahmud R. Enhanced Oxidation of Uric Acid at Thiourea-Modified Gold Electrode in Alkaline Media. RUSS J ELECTROCHEM+ 2020. [DOI: 10.1134/s1023193520070046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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15
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Abstract
Gravimetric transducers produce a signal based on a change in mass. These transducers can be used to construct gas sensors or biosensors using odorant binding proteins (OBPs) as recognition elements for small volatile organic compounds. The methods described in this chapter are based on the immobilization of the OBPs onto functionalized (activated) self-assembled monolayer (SAMs) on gold and on nanocrystalline diamond surfaces. Depending on the surface immobilization methods used to fabricate the biosensor, recombinant proteins can be engineered to express six histidine tags either on the N-terminal or C-terminal of the proteins and these can also be used to facilitate protein immobilization. These methods are used to produce functional sensors based on quartz crystal microbalances or surface acoustic wave devices and are also applicable to other types of gravimetric transducers.
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Affiliation(s)
- Khasim Cali
- Department of Instrumentation and Analytical Science, The University of Manchester, Manchester, United Kingdom
| | | | - Krishna C Persaud
- Department of Instrumentation and Analytical Science, The University of Manchester, Manchester, United Kingdom.
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Chinnadayyala SR, Park J, Kim YH, Choi SH, Lee SM, Cho WW, Lee GY, Pyun JC, Cho S. Electrochemical Detection of C-Reactive Protein in Human Serum Based on Self-Assembled Monolayer-Modified Interdigitated Wave-Shaped Electrode. SENSORS (BASEL, SWITZERLAND) 2019; 19:E5560. [PMID: 31888286 PMCID: PMC6960938 DOI: 10.3390/s19245560] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 12/06/2019] [Accepted: 12/11/2019] [Indexed: 12/15/2022]
Abstract
An electrochemical capacitance immunosensor based on an interdigitated wave-shaped micro electrode array (IDWµE) for direct and label-free detection of C-reactive protein (CRP) was reported. A self-assembled monolayer (SAM) of dithiobis (succinimidyl propionate) (DTSP) was used to modify the electrode array for antibody immobilization. The SAM functionalized electrode array was characterized morphologically by atomic force microscopy (AFM) and energy dispersive X-ray spectroscopy (EDX). The nature of gold-sulfur interactions on SAM-treated electrode array was probed by X-ray photoelectron spectroscopy (XPS). The covalent linking of anti-CRP-antibodies onto the SAM modified electrode array was characterized morphologically through AFM, and electrochemically through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The application of phosphate-buffered saline (PBS) and human serum (HS) samples containing different concentrations of CRP in the electrode array caused changes in the electrode interfacial capacitance upon CRP binding. CRP concentrations in PBS and HS were determined quantitatively by measuring the change in capacitance (ΔC) through EIS. The electrode immobilized with anti-CRP-antibodies showed an increase in ΔC with the addition of CRP concentrations over a range of 0.01-10,000 ng mL-1. The electrode showed detection limits of 0.025 ng mL-1 and 0.23 ng mL-1 (S/N = 3) in PBS and HS, respectively. The biosensor showed a good reproducibility (relative standard deviation (RSD), 1.70%), repeatability (RSD, 1.95%), and adequate selectivity in presence of interferents towards CRP detection. The sensor also exhibited a significant storage stability of 2 weeks at 4 °C in 1× PBS.
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Affiliation(s)
| | - Jinsoo Park
- Gachon Advanced Institute for Health Science & Technology, Gachon University, Incheon 21999, Korea;
| | - Young Hyo Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Inha University, Incheon 22332, Korea;
| | - Seong Hye Choi
- Department of Neurology, School of Medicine, Inha University, Incheon 22332, Korea;
| | - Sang-Myung Lee
- Department of Chemical Engineering, Kangwon National University, Chuncheon 25341, Korea;
| | - Won Woo Cho
- Cantis Inc., Ansan-si, Gyeonggi-do 15588, Korea;
| | - Ga-Yeon Lee
- Department of Materials Science and Engineering, Yonsei University, Seoul 03772, Korea; (G.-Y.L.); (J.-C.P.)
| | - Jae-Chul Pyun
- Department of Materials Science and Engineering, Yonsei University, Seoul 03772, Korea; (G.-Y.L.); (J.-C.P.)
| | - Sungbo Cho
- Department of Electronic Engineering, Gachon University, Seongnam-si, Gyeonggi-do, Incheon 13120, Korea;
- Gachon Advanced Institute for Health Science & Technology, Gachon University, Incheon 21999, Korea;
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Electrochemical immunosensor based on MoS2 NFs/Au@AgPt YNCs as signal amplification label for sensitive detection of CEA. Biosens Bioelectron 2019; 142:111580. [DOI: 10.1016/j.bios.2019.111580] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/27/2019] [Accepted: 08/08/2019] [Indexed: 11/18/2022]
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Qin J, Cho M, Lee Y. Ultrasensitive Detection of Amyloid-β Using Cellular Prion Protein on the Highly Conductive Au Nanoparticles–Poly(3,4-ethylene dioxythiophene)–Poly(thiophene-3-acetic acid) Composite Electrode. Anal Chem 2019; 91:11259-11265. [DOI: 10.1021/acs.analchem.9b02266] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jieling Qin
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Korea
| | - Misuk Cho
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Korea
| | - Youngkwan Lee
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Korea
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19
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Zuo Z, Wang K, Gao L, Ho V, Mao H, Qian D. A Novel Mass-Producible Capacitive Sensor with Fully Symmetric 3D Structure and Microfluidics for Cells Detection. SENSORS (BASEL, SWITZERLAND) 2019; 19:E325. [PMID: 30650603 PMCID: PMC6359746 DOI: 10.3390/s19020325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 01/10/2019] [Accepted: 01/11/2019] [Indexed: 11/24/2022]
Abstract
Affinity biosensors of interdigitated electrodes have been widely used in cell detection. This research presents a mass-producible and disposable three-dimensional (3D) structure capacitive sensor based on the integrated circuit package lead frames for cell concentration detection. The fully symmetric 3D interdigital electrode structure makes the sensor more homogeneous and sensitive. (3-Aminopropyl) triethoxysilane (APTES) and glutaraldehyde are immobilized onto gold-plated electrodes. By overlaying the microfluidic channels on top, the volume of the solution is kept constant to obtain repeatable measured capacitance values. Moreover, using the upgraded reading and writing functions and circular measurement of the E4980A Data Transfer Program, an automatic multigroup test system is developed. It is shown that the cell concentration and capacitance are inversely correlated, and the cell concentration range of 10³⁻10⁶ CFU∙mL-1 is achieved. In addition, the rate of capacitance change matches that of state-of-the-art biosensors reported. A program is developed to find the optimal voltage and frequency for linear fitting between the capacitance change and cell concentration. Future work will employ machine learning-based data analysis to drug resistance sensitivity test of cell lines and cell survival status.
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Affiliation(s)
- Zhaorui Zuo
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.
| | - Kun Wang
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
| | - Libin Gao
- Shanghai Institute of Nutrition and Health; Chinese Academy of Science, Shanghai 200031, China.
| | - Vincent Ho
- Richtek Technology Corporation, Hsinchu 30288, Taiwan.
| | - Hongju Mao
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
| | - Dahong Qian
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.
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Affiliation(s)
- Ariel L. Furst
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Matthew B. Francis
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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21
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Beloglazova NV, Lenain P, De Rycke E, Goryacheva IY, Knopp D, De Saeger S. Capacitive sensor for detection of benzo(a)pyrene in water. Talanta 2018; 190:219-225. [DOI: 10.1016/j.talanta.2018.07.084] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/22/2018] [Accepted: 07/26/2018] [Indexed: 01/02/2023]
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22
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Han L, Xia H, Yin L, Petrenko VA, Liu A. Selected landscape phage probe as selective recognition interface for sensitive total prostate-specific antigen immunosensor. Biosens Bioelectron 2018; 106:1-6. [PMID: 29414074 DOI: 10.1016/j.bios.2018.01.046] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 01/19/2018] [Accepted: 01/23/2018] [Indexed: 12/11/2022]
Abstract
The level of total prostate-specific antigen (t-PSA) is generally known as the key index of prostate cancer. Here, phage probes against t-PSA were selected from f8/8 landscape phage library. After three rounds of biopanning, four t-PSA-binding phage clones were isolated and identified by the DNA sequencing. Based on the phage capture assay, the phage clone displaying the fusion peptide ATRSANGM showed highest affinity and specificity against t-PSA. Subsequently, the t-PSA-specific phage was used as t-PSA capture probe in a sandwich enzyme-linked immunosorbent assay (ELISA) and differential pulse voltammetry (DPV) assay systems. Both assay methods showed high specificity and acceptable reliability for real serum samples analysis. By comparison, DPV method showed wider linear range (0.01-100 ng mL-1) and lower limit of detection (3 pg mL-1) than those (3.3-330 ng mL-1 and 1.6 ng mL-1) of ELISA. Moreover, DPV system showed smaller distinction to the authoritative method in real samples assay. Excitingly, the phage probe based DPV immunosensor showed high sensitivity for the detection of t-PSA and LOD achieved the pg mL-1 level, which was far lower than those values (usually above 0.1 ng mL-1) for reported immunosensors based on antibodies. Due to the biocompatibility, multivalency, stability, and high structural homogeneity, the t-PSA-specific landscape phage demonstrates as a novel specific interface in biosensors.
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Affiliation(s)
- Lei Han
- Institute for Biosensing, and College of Life Sciences, Qingdao University, 308 Ningxia Road, Qingdao 266071, China; College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, 700 Changcheng Road, Qingdao, Shandong, China
| | - Hongqi Xia
- Institute for Biosensing, and College of Life Sciences, Qingdao University, 308 Ningxia Road, Qingdao 266071, China; College of Chemistry and Chemical Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China; Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto 6068502, Japan
| | - Long Yin
- Institute for Biosensing, and College of Life Sciences, Qingdao University, 308 Ningxia Road, Qingdao 266071, China; College of Chemistry and Chemical Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China
| | - Valery A Petrenko
- Department of Pathobiology, Auburn University, 269 Greene Hall, Auburn, AL 36849-5519, United States
| | - Aihua Liu
- Institute for Biosensing, and College of Life Sciences, Qingdao University, 308 Ningxia Road, Qingdao 266071, China; College of Chemistry and Chemical Engineering, Qingdao University, 308 Ningxia Road, Qingdao 266071, China; Department of Drug Metabolism and Analysis,School of Pharmacy, Medical College, Qingdao University, Qingdao 266021, China.
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23
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Qin J, Jo DG, Cho M, Lee Y. Monitoring of early diagnosis of Alzheimer's disease using the cellular prion protein and poly(pyrrole-2-carboxylic acid) modified electrode. Biosens Bioelectron 2018; 113:82-87. [DOI: 10.1016/j.bios.2018.04.061] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 04/27/2018] [Accepted: 04/30/2018] [Indexed: 12/01/2022]
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24
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Niyomdecha S, Limbut W, Numnuam A, Kanatharana P, Charlermroj R, Karoonuthaisiri N, Thavarungkul P. Phage-based capacitive biosensor for Salmonella detection. Talanta 2018; 188:658-664. [PMID: 30029427 DOI: 10.1016/j.talanta.2018.06.033] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 06/09/2018] [Accepted: 06/09/2018] [Indexed: 11/18/2022]
Abstract
This article reports the detection of Salmonella spp. based on M13 bacteriophage in a capacitive flow injection system. Salmonella-specific M13 bacteriophage was immobilized on a polytyramine/gold surface using glutaraldehyde as a crosslinker. The M13 bacteriophage modified electrode can specifically bind to Salmonella spp. via the amino acid groups on the filamentous phage. An alkaline solution was used to break the binding between the sensing surface and the analyte to allow renewable use up to 40 times. This capacitive system provided good reproducibility with a relative standard deviation (RSD) of 1.1%. A 75 µL min-1 flow rate and a 300 µL sample volume provided a wide linear range, from 2.0 × 102 to 1.0 × 107 cfu mL-1, with a detection limit of 200 cfu mL-1. Bacteria concentration can be analyzed within 40 min after the sample injection. When applied to test real samples (raw chicken meat) it provided good recoveries (100-111%). An enrichment process was also explored to increase the bacteria concentration, enabling a quantitative detection of Salmonella spp. This biosensor opens a new opportunity for the detection of pathogenic bacteria using bacteriophage.
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Affiliation(s)
- Saroh Niyomdecha
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Warakorn Limbut
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Department of Applied Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Apon Numnuam
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Proespichaya Kanatharana
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Ratthaphol Charlermroj
- National Center for Genetic Engineering and Biotechnology, 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
| | - Nitsara Karoonuthaisiri
- National Center for Genetic Engineering and Biotechnology, 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand.
| | - Panote Thavarungkul
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Department of Physics, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand.
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25
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Muñoz J, Montes R, Baeza M. Trends in electrochemical impedance spectroscopy involving nanocomposite transducers: Characterization, architecture surface and bio-sensing. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.08.012] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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26
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Phal S, Lindholm-Sethson B, Geladi P, Shchukarev A, Tesfalidet S. Determination of methotrexate in spiked human blood serum using multi-frequency electrochemical immittance spectroscopy and multivariate data analysis. Anal Chim Acta 2017; 987:15-24. [PMID: 28916036 DOI: 10.1016/j.aca.2017.08.034] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 08/07/2017] [Accepted: 08/15/2017] [Indexed: 02/01/2023]
Abstract
This article describes an attempt to develop a sensor based on multi-frequency immittance spectroscopy for the determination of methotrexate (MTX) in blood serum using gold electrodes modified with antibodies. The attachment of antibodies was monitored with electrochemical immittance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS). The EIS measurements of MTX resulted in a data matrix of size 39 × 55. The data were analysed using multivariate data analysis and showed a concentration dependence and time dependence that could be separated. This allowed the calculation of a multivariate calibration model. The model showed good linear behavior on a logarithmic scale offering a detection limit of 5 × 10-12 mol L-1.
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Affiliation(s)
| | | | - Paul Geladi
- Corpus Data & Image Analysis AB, Rålambsvägen 66 B, Suit 1408, SE 112 56 Stockholm, Sweden
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27
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Gutierrez R AV, Hedström M, Mattiasson B. Bioimprinting as a tool for the detection of aflatoxin B1 using a capacitive biosensor. ACTA ACUST UNITED AC 2016; 11:12-17. [PMID: 28352535 PMCID: PMC5042299 DOI: 10.1016/j.btre.2016.05.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 05/13/2016] [Accepted: 05/13/2016] [Indexed: 11/28/2022]
Abstract
Bioimprinting of proteins is used for production of selective binding sites for aflatoxin. An inert protein, ovalbumin was used for the bioimpriting. When stabilizing the imprinted molecule by internal cross-linking, it was possible to use the same imprint more than 25 times. A limit of detection of 6 × 10−12 M was observed.
A strategy for the detection of aflatoxin B1 using a capacitive biosensor has been studied. The use of proteins for the generation of sites with high specificity against aflatoxin B1 are produced via bioimprinting. This technique has become a tool for the detection of aflatoxin B1 using a capacitive biosensor. The results demonstrate the ability to generate specific interactions with aflatoxin B1 with a linear relation between signals registered and log concentration of the target aflatoxin in the concentration range of 3.2 × 10−6 to 3.2 × 10−9 M when using ovalbumin as framework for the bioimprinting.
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Affiliation(s)
- Alvaro V Gutierrez R
- Division of Biotechnology, Lund University, Lund, Sweden; IIFB, FCFB, Universidad Mayor de San Andres, La Paz, Bolivia
| | - Martin Hedström
- Division of Biotechnology, Lund University, Lund, Sweden; CapSenze Biosystems AB, Scheelevägen 22, Lund, Sweden
| | - Bo Mattiasson
- Division of Biotechnology, Lund University, Lund, Sweden; CapSenze Biosystems AB, Scheelevägen 22, Lund, Sweden
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28
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Immobilization strategy for enhancing sensitivity of immunosensors: L -Asparagine–AuNPs as a promising alternative of EDC–NHS activated citrate–AuNPs for antibody immobilization. Biosens Bioelectron 2016; 78:396-403. [DOI: 10.1016/j.bios.2015.11.066] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 11/18/2015] [Accepted: 11/23/2015] [Indexed: 11/23/2022]
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29
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Han L, Liu P, Petrenko VA, Liu A. A Label-Free Electrochemical Impedance Cytosensor Based on Specific Peptide-Fused Phage Selected from Landscape Phage Library. Sci Rep 2016; 6:22199. [PMID: 26908277 PMCID: PMC4764921 DOI: 10.1038/srep22199] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 02/09/2016] [Indexed: 11/09/2022] Open
Abstract
One of the major challenges in the design of biosensors for cancer diagnosis is to introduce a low-cost and selective probe that can recognize cancer cells. In this paper, we combined the phage display technology and electrochemical impedance spectroscopy (EIS) to develop a label-free cytosensor for the detection of cancer cells, without complicated purification of recognition elements. Fabrication steps of the cytosensing interface were monitored by EIS. Due to the high specificity of the displayed octapeptides and avidity effect of their multicopy display on the phage scaffold, good biocompatibility of recombinant phage, the fibrous nanostructure of phage, and the inherent merits of EIS technology, the proposed cytosensor demonstrated a wide linear range (2.0 × 10(2) - 2.0 × 10(8) cells mL(-1)), a low limit of detection (79 cells mL(-1), S/N = 3), high specificity, good inter-and intra-assay reproducibility and satisfactory storage stability. This novel cytosensor designing strategy will open a new prospect for rapid and label-free electrochemical platform for tumor diagnosis.
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Affiliation(s)
- Lei Han
- Institute for Biosensing &In-Vitro Diagnostics, and College of Medicine, Qingdao University, 38 Dengzhou Road, Qingdao 266021, China.,Laboratory for Biosensing, Qingdao Institute of Bioenergy &Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101, China
| | - Pei Liu
- Laboratory for Biosensing, Qingdao Institute of Bioenergy &Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101, China
| | - Valery A Petrenko
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, 269 Greene Hall, Auburn, Alabama 36849-5519, United States
| | - Aihua Liu
- Institute for Biosensing &In-Vitro Diagnostics, and College of Medicine, Qingdao University, 38 Dengzhou Road, Qingdao 266021, China.,Laboratory for Biosensing, Qingdao Institute of Bioenergy &Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, 266101, China
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30
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Gutierrez R AV, Hedström M, Mattiasson B. Screening of self-assembled monolayer for aflatoxin B1 detection using immune-capacitive sensor. ACTA ACUST UNITED AC 2015; 8:144-151. [PMID: 28352584 PMCID: PMC4980746 DOI: 10.1016/j.btre.2015.10.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 09/23/2015] [Accepted: 10/04/2015] [Indexed: 02/07/2023]
Abstract
A capacitive biosensor was used for detection of aflatoxin B1. Two different methods for cleaning gold electrodes were evaluated using cyclic voltammetry in the presence of ferricyanide as redox couple. The methods involve use of a sequence of cleaning steps avoiding the use of Piranha solution and plasma cleaner. Anti-aflatoxin B1 was immobilized on self-assembled monolayers (SAM). The immune-capacitive biosensor is able to detect aflatoxin B1 concentrations in a linear range of 3.2 × 10−12 M to 3.2 × 10−9 M when thiourea was used to form the SAM; 3.2 × 10−9 M to 3.2 × 10−7 M when thioctic acid was used. When the gold surface was isolated with tyramine-electropolymerization linear ranges of 3.2 × 10−13 M to 3.2 × 10−7 M and 3.2 × 10−9 M to 3.2 × 10−7 M where obtained, respectively. The results obtained show the difference in linear range, limit of detection, and limit of quantification when different self-assembled monolayers are used for aflatoxin B1 detection.
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Affiliation(s)
- Alvaro V Gutierrez R
- Department of Biotechnology, Lund University, Lund, Sweden; IIFB, FCFB, Universidad Mayor de San Andres, La Paz, Bolivia
| | - Martin Hedström
- Department of Biotechnology, Lund University, Lund, Sweden; CapSenze HB, Medicon Village, Lund, Sweden
| | - Bo Mattiasson
- Department of Biotechnology, Lund University, Lund, Sweden; CapSenze HB, Medicon Village, Lund, Sweden
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31
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Application of a Label-Free Immunosensor for White Spot Syndrome Virus (WSSV) in Shrimp Cultivation Water. Appl Biochem Biotechnol 2015; 177:821-30. [DOI: 10.1007/s12010-015-1780-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 07/23/2015] [Indexed: 02/03/2023]
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32
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Diba FS, Kim S, Lee HJ. Amperometric bioaffinity sensing platform for avian influenza virus proteins with aptamer modified gold nanoparticles on carbon chips. Biosens Bioelectron 2015; 72:355-61. [PMID: 26011543 DOI: 10.1016/j.bios.2015.05.020] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 05/05/2015] [Accepted: 05/07/2015] [Indexed: 12/20/2022]
Abstract
A sandwich assay platform involving a surface formed aptamer-protein-antibody complex was developed to obtain the highly selective and sensitive amperometric detection of H5N1 viral proteins using a gold nanoparticle (NP) modified electrode. This is the first aptamer-antibody pairing reported for the selective detection of H5N1. Nanoparticle deposited screen-printed carbon electrodes were first functionalized by the covalent immobilization of a DNA aptamer specific to H5N1 followed by the adsorption of H5N1 protein. Alkaline phosphatase (ALP) conjugated monoclonal antibody was then adsorbed to form a surface bound Au NPs-aptamer/H5N1/antiH5N1-ALP sandwich complex which was further reacted with the enzyme substrate, 4-amino phenyl phosphate (APP). The current associated with the electrocatalytic reaction of the surface bound ALP with APP increased as the H5N1 concentration increased. A lowest detectable concentration of 100 fM was obtained with a linear dynamic range of 100 fM to 10 pM using differential pulse voltammetry. As an example, the biosensor was applied to the detection of H5N1 protein in diluted human serum samples spiked with different concentrations of the viral protein target.
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Affiliation(s)
- Farhana Sharmin Diba
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, 80 Daehakro, Buk-gu, Daegu-city 702-701, Republic of Korea
| | - Suhee Kim
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, 80 Daehakro, Buk-gu, Daegu-city 702-701, Republic of Korea
| | - Hye Jin Lee
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, 80 Daehakro, Buk-gu, Daegu-city 702-701, Republic of Korea.
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A label-free immunosensor for ultrasensitive detection of ketamine based on quartz crystal microbalance. SENSORS 2015; 15:8540-9. [PMID: 25871722 PMCID: PMC4431222 DOI: 10.3390/s150408540] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 03/18/2015] [Accepted: 03/30/2015] [Indexed: 11/17/2022]
Abstract
In this study, we have developed a label-free immunosensor with the variation of resonance frequency (Δf) of a quartz crystal microbalance (QCM) as readout signal for ultrasensitive detection of Ketamine (KT). An optimized strategy for immobilization of KT antibody on the surface of the QCM chip was implemented via the self-assembly modification of 3-mercaptopropionic acid, and then activated with 1-ethyl-3-(3-dimethylaminoprophl) carbodiimide and n-hydroxysuccinimide. The specific affinity between the antibody and the antigen ensured a selective response toward KT. The Δf linearly related to the concentration of KT in the range of 1 to 40 pg/mL, with a detection limit of 0.86 pg/mL (S/N = 3). The obtained immunosensor was applied to detect the KT in spiked human urine without any pretreatment but dilution with recoveries from 91.8% to 108%. The developed sensor is promising to perform the portable or on-spot KT detection in clinic or forensic cases.
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34
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Applications of electrochemical immunosensors for early clinical diagnostics. Talanta 2015; 132:162-74. [DOI: 10.1016/j.talanta.2014.08.063] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 08/18/2014] [Accepted: 08/27/2014] [Indexed: 12/13/2022]
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35
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Chaocharoen W, Ranok A, Suginta W, Schulte A. A microfluidic capacitive immunosensor system for human cartilage chitinase-3-like protein 2 (hYKL-39) quantification as an osteoarthritis marker in synovial joint fluid. RSC Adv 2015. [DOI: 10.1039/c5ra11379b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Flow-based electrochemical osteoarthritis biomarker quantification in joint synovial fluid has been established as first alternative to optical ELISA assays.
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Affiliation(s)
- W. Chaocharoen
- School of Biochemistry
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000
- Thailand
| | - A. Ranok
- School of Biochemistry
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000
- Thailand
| | - W. Suginta
- School of Biochemistry
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000
- Thailand
| | - A. Schulte
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Nakhon Ratchasima 30000
- Thailand
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36
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Mahadhy A, Ståhl-Wernersson E, Mattiasson B, Hedström M. Use of a capacitive affinity biosensor for sensitive and selective detection and quantification of DNA-A model study. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2014; 3:42-48. [PMID: 28626647 PMCID: PMC5466103 DOI: 10.1016/j.btre.2014.06.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 06/02/2014] [Accepted: 06/02/2014] [Indexed: 11/27/2022]
Abstract
A capacitive DNA-sensor model system was used to monitor the capture of complementary single-stranded DNAs. The sensor chip consisted of a gold electrode, which was carefully insulated with a polytyramine layer and covalently tagged with 25-mer oligo-C. As low as 10-11 moles per liter of target oligo-G could be detected by injecting 250 μL of sample. Elevated temperature was used to reduce non-specific hybridization. Less than 10% of non-target 25-mer oligo-T interacted nonspecifically with the oligo-C probes when hybridization process was performed at 50 °C. Studying the relationship of length of the analyte to the signal strength, the output from the capacitive DNA-sensor increased to almost the double; from 50 to 88-nF cm-2, when a 25-mer oligo-G was used instead of a 15-mer. By sandwich hybridization at room temperature, it was possible to further increase the signal, from 78-nF cm-2 for the target 50-mer oligo-G alone, to 114-nF cm-2.
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Affiliation(s)
| | | | | | - Martin Hedström
- Department of Biotechnology, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
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Chaocharoen W, Suginta W, Limbut W, Ranok A, Numnuam A, Khunkaewla P, Kanatharana P, Thavarungkul P, Schulte A. Electrochemical detection of the disease marker human chitinase-3-like protein 1 by matching antibody-modified gold electrodes as label-free immunosensors. Bioelectrochemistry 2014; 101:106-13. [PMID: 25203453 DOI: 10.1016/j.bioelechem.2014.07.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 06/27/2014] [Accepted: 07/06/2014] [Indexed: 01/27/2023]
Abstract
Tissue inflammation, certain cardiovascular syndromes and the occurrence of some solid tumors are correlated with raised serum concentrations of human chitinase-3-like protein 1 (YKL-40), a mammalian chitinase-like glycoprotein, which has become the subject of current research. Here we report the construction and characterization of an electrochemical platform for label-free immunosensing of YKL-40. Details of the synthesis of YKL-40 and production of anti-YKL-40 immunoglobulin G (IgG) are provided and cross-reactivity tests presented. Polyclonal anti-YKL-40 IgG was immobilized on gold electrodes and the resulting immunosensors were operated in an electrochemical flow system with capacitive signal generation. The strategy offered a wide linear detection range (0.1μg/L to 1mg/L) with correlation coefficients (R(2)) above 0.99 and good sensitivity (12.28±0.27nF/cm(2) per decade of concentration change). Additionally, the detection limit of 0.07±0.01μg/L was well below that of optical enzyme-linked immunosorbent assays (ELISAs), which makes the proposed methodology a promising alternative for YKL-40 related disease studies.
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Affiliation(s)
- Wethaka Chaocharoen
- Biochemistry-Electrochemistry Research Unit, Schools of Chemistry and Biochemistry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Wipa Suginta
- Biochemistry-Electrochemistry Research Unit, Schools of Chemistry and Biochemistry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Warakorn Limbut
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Department of Applied Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Araya Ranok
- Biochemistry-Electrochemistry Research Unit, Schools of Chemistry and Biochemistry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Apon Numnuam
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Panida Khunkaewla
- Biochemistry-Electrochemistry Research Unit, Schools of Chemistry and Biochemistry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Proespichaya Kanatharana
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Panote Thavarungkul
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Department of Physics, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand.
| | - Albert Schulte
- Biochemistry-Electrochemistry Research Unit, Schools of Chemistry and Biochemistry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
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Yang Y, Pan J, Hua W, Tu Y. An approach for the preparation of highly sensitive electrochemical impedimetric immunosensors for the detection of illicit drugs. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.04.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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39
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Ihalainen P, Pettersson F, Pesonen M, Viitala T, Määttänen A, Österbacka R, Peltonen J. An impedimetric study of DNA hybridization on paper-supported inkjet-printed gold electrodes. NANOTECHNOLOGY 2014; 25:094009. [PMID: 24522116 DOI: 10.1088/0957-4484/25/9/094009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this study, two different supramolecular recognition architectures for impedimetric detection of DNA hybridization have been formed on disposable paper-supported inkjet-printed gold electrodes. The gold electrodes were fabricated using a gold nanoparticle based ink. The first recognition architecture consists of subsequent layers of biotinylated self-assembly monolayer (SAM), streptavidin and biotinylated DNA probe. The other recognition architecture is constructed by immobilization of thiol-functionalized DNA probe (HS-DNA) and subsequent backfill with 11-mercapto-1-undecanol (MUOH) SAM. The binding capacity and selectivity of the recognition architectures were examined by surface plasmon resonance (SPR) measurements. SPR results showed that the HS-DNA/MUOH system had a higher binding capacity for the complementary DNA target. Electrochemical impedance spectroscopy (EIS) measurements showed that the hybridization can be detected with impedimetric spectroscopy in picomol range for both systems. EIS signal indicated a good selectivity for both recognition architectures, whereas SPR showed very high unspecific binding for the HS-DNA/MUOH system. The factors affecting the impedance signal were interpreted in terms of the complexity of the supramolecular architecture. The more complex architecture acts as a less ideal capacitive sensor and the impedance signal is dominated by the resistive elements.
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Affiliation(s)
- Petri Ihalainen
- Center of Excellence for Functional Materials and Laboratory of Physical Chemistry, Department of Natural Sciences, Åbo Akademi University, Turku, Finland
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40
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Wang X, Ju J, Li J, Li J, Qian Q, Mao C, Shen J. Preparation of Electrochemical Cytosensor for Sensitive Detection of HeLa Cells Based on Self-Assembled Monolayer. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.01.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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41
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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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42
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One-step porous gold fabricated electrode for electrochemical impedance spectroscopy immunosensor detection. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.08.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Development of electrochemical immunosensors towards point of care diagnostics. Biosens Bioelectron 2013; 47:1-11. [DOI: 10.1016/j.bios.2013.02.045] [Citation(s) in RCA: 172] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/27/2013] [Accepted: 02/28/2013] [Indexed: 12/21/2022]
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44
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Pohl TLM, Schwab EH, Cavalcanti-Adam EA. Covalent binding of BMP-2 on surfaces using a self-assembled monolayer approach. J Vis Exp 2013. [PMID: 24021994 DOI: 10.3791/50842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Bone morphogenetic protein 2 (BMP-2) is a growth factor embedded in the extracellular matrix of bone tissue. BMP-2 acts as trigger of mesenchymal cell differentiation into osteoblasts, thus stimulating healing and de novo bone formation. The clinical use of recombinant human BMP-2 (rhBMP-2) in conjunction with scaffolds has raised recent controversies, based on the mode of presentation and the amount to be delivered. The protocol presented here provides a simple and efficient way to deliver BMP-2 for in vitro studies on cells. We describe how to form a self-assembled monolayer consisting of a heterobifunctional linker, and show the subsequent binding step to obtain covalent immobilization of rhBMP-2. With this approach it is possible to achieve a sustained presentation of BMP-2 while maintaining the biological activity of the protein. In fact, the surface immobilization of BMP-2 allows targeted investigations by preventing unspecific adsorption, while reducing the amount of growth factor and, most notably, hindering uncontrolled release from the surface. Both short- and long-term signaling events triggered by BMP-2 are taking place when cells are exposed to surfaces presenting covalently immobilized rhBMP-2, making this approach suitable for in vitro studies on cell responses to BMP-2 stimulation.
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Affiliation(s)
- Theresa L M Pohl
- Department of Biophysical Chemistry, Institute for Physical Chemistry, University of Heidelberg
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45
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Silver nanoparticles to improve electron transfer at interfaces of gold electrodes modified by biotin or avidin. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2012.12.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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46
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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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47
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Niu Y, Matos AI, Abrantes LM, Viana AS, Jin G. Antibody oriented immobilization on gold using the reaction between carbon disulfide and amine groups and its application in immunosensing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:17718-17725. [PMID: 23210719 DOI: 10.1021/la303032f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Carbon disulfide (CS(2)) can spontaneously react with amine groups to form dithiocarbamates on gold surface, providing the possibility to immobilize some compounds with primary or secondary amine groups in one step. Using this principle, an immunosensor interface prepared for immunoglobulin G (IgG) sensing surface toward anti-IgG has been fabricated for the first time by simply immersing gold slides into a mixed aqueous solution of CS(2) and protein A, followed by incubation in immunoglobulin G solution. The reaction between CS(2) and protein A has been followed by UV-vis spectroscopy, whereas cyclic voltammetry has been employed in the characterization of the modified gold surface with CS(2) and protein A, both methods indicating that protein A immobilization is implemented by CS(2). Conventional ellipsometry, atomic force microscopy (AFM), as well as surface plasmon resonance (SPR) have been used to evaluate the specific binding of protein A with IgG and IgG with anti-IgG, revealing that IgG is specifically captured to form the biosensing interface, maintaining its bioactivity. Compared to direct adsorption of IgG on the gold surface, the IgG sensing surface constructed of CS(2) and protein A is far more sensitive to capture anti-IgG as its target molecule. In addition, the modified surface is proven to have good capability to inhibit nonspecific adsorption, as supported by control experiments using lysozyme and BSA. To conclude, antibody immobilization using this one-step method has potential as a simple and convenient surface modification approach for immunosensor development.
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Affiliation(s)
- Yu Niu
- NML, Institute of Mechanics, Chinese Academy of Sciences, 100190 Beijing, China
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48
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Samanman S, Kanatharana P, Asawatreratanakul P, Thavarungkul P. Characterization and application of self-assembled layer by layer gold nanoparticles for highly sensitive label-free capacitive immunosensing. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.07.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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49
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Thipmanee O, Samanman S, Sankoh S, Numnuam A, Limbut W, Kanatharana P, Vilaivan T, Thavarungkul P. Label-free capacitive DNA sensor using immobilized pyrrolidinyl PNA probe: effect of the length and terminating head group of the blocking thiols. Biosens Bioelectron 2012; 38:430-5. [PMID: 22770826 DOI: 10.1016/j.bios.2012.06.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 06/13/2012] [Indexed: 10/28/2022]
Abstract
This paper reports, for the first time, the influence of the length and the terminating head group of blocking thiols on the sensitivity and specificity of a label-free capacitive DNA detection system using immobilized pyrrolidinyl peptide nucleic acid (acpcPNA) probes. A C-terminal lysine-modified acpcPNA was immobilized through four different alkanethiol self-assembled monolayers (SAMs), i.e., 3-mercaptopropionic acid (MPA), thioctic acid (TA), thiourea (TU) and mercaptosuccinic acid (MSA). The hybridization between the acpcPNA probes and the target DNA was directly measured using the capacitive system. Five blocking thiols of various lengths (C=3, 6, 8, 9 and 11), with the -OH terminating head group, i.e., 3-mercapto-1-propanol (3-MPL), 6-mercapto-1-hexanol (6-MHL), 8-mercapto-1-octanol (8-MOL), 9-mercapto-1-nonanol (9-MNL), 11-mercapto-1-undecanol (11-MUL) and another blocking thiol (C=11) with a -CH(3) terminating head group, and 1-dodecanethiol (1-DDT) were investigated. The blocking thiol with the same length as the total spacer of the immobilized acpcPNA gave the highest sensitivity and specificity with the -OH terminating head group providing a slightly better signal than the -CH(3) group. Under the optimized conditions, the immobilized acpcPNA probes provided a wide linear range for DNA detection (1.0 × 10(-11)-1.0 × 10(-8)M) with a very low detection limit in the picomolar range. The modified acpcPNA electrode could be reused through at least 58 cycles. The high sensitivity and very low detection limits are potentially useful for the analysis of ultra-trace levels of DNA in samples. Preliminary studies were also performed to see the effect of probe concentration and target length.
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Affiliation(s)
- Orawan Thipmanee
- Trace Analysis and Biosensor Research Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
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50
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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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