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Gordón Pidal JM, Moreno-Guzmán M, Montero-Calle A, Valverde A, Pingarrón JM, Campuzano S, Calero M, Barderas R, López MÁ, Escarpa A. Micromotor-based electrochemical immunoassays for reliable determination of amyloid-β (1-42) in Alzheimer's diagnosed clinical samples. Biosens Bioelectron 2024; 249:115988. [PMID: 38194814 DOI: 10.1016/j.bios.2023.115988] [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: 11/21/2023] [Revised: 12/22/2023] [Accepted: 12/27/2023] [Indexed: 01/11/2024]
Abstract
Alzheimer's disease (AD), in addition to being the most common cause of dementia, is very difficult to diagnose, with the 42-amino acid form of Aβ (Aβ-42) being one of the main biomarkers used for this purpose. Despite the enormous efforts made in recent years, the technologies available to determine Aβ-42 in human samples require sophisticated instrumentation, present high complexity, are sample and time-consuming, and are costly, highlighting the urgent need not only to develop new tools to overcome these limitations but to provide an early detection and treatment window for AD, which is a top-challenge. In recent years, micromotor (MM) technology has proven to add a new dimension to clinical biosensing, enabling ultrasensitive detections in short times and microscale environments. To this end, here an electrochemical immunoassay based on polypyrrole (PPy)/nickel (Ni)/platinum nanoparticles (PtNPs) MM is proposed in a pioneering manner for the determination of Aβ-42 in left prefrontal cortex brain tissue, cerebrospinal fluid, and plasma samples from patients with AD. MM combines the high binding capacity of their immunorecognition external layer with self-propulsion through the catalytic generation of oxygen bubbles in the internal layer due to decomposition of hydrogen peroxide as fuel, allowing rapid bio-detection (15 min) of Aβ-42 with excellent selectivity and sensitivity (LOD = 0.06 ng/mL). The application of this disruptive technology to the analysis of just 25 μL of the three types of clinical samples provides values concordant with the clinical values reported, thus confirming the potential of the MM approach to assist in the reliable, simple, fast, and affordable diagnosis of AD by determining Aβ-42.
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Affiliation(s)
- José M Gordón Pidal
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, Ctra. Madrid-Barcelona, Km. 33.600, Alcalá de Henares, 28802, Madrid, Spain
| | - María Moreno-Guzmán
- Department of Chemistry in Pharmaceutical Sciences, Analytical Chemistry, Faculty of Pharmacy, Complutense University of Madrid, Plaza Ramón y Cajal, s/n, 28040, Madrid, Spain
| | - Ana Montero-Calle
- Chronic Disease Programme, UFIEC, Carlos III Health Institute, Majadahonda, Madrid, 28220, Spain
| | - Alejandro Valverde
- Department of Analytical Chemistry, Faculty of Chemistry Science, Complutense University of Madrid, Pza. de las Ciencias 2, Madrid, 28040, Spain
| | - José M Pingarrón
- Department of Analytical Chemistry, Faculty of Chemistry Science, Complutense University of Madrid, Pza. de las Ciencias 2, Madrid, 28040, Spain
| | - Susana Campuzano
- Department of Analytical Chemistry, Faculty of Chemistry Science, Complutense University of Madrid, Pza. de las Ciencias 2, Madrid, 28040, Spain.
| | - Miguel Calero
- Chronic Disease Programme, UFIEC, Carlos III Health Institute, Majadahonda, Madrid, 28220, Spain
| | - Rodrigo Barderas
- Chronic Disease Programme, UFIEC, Carlos III Health Institute, Majadahonda, Madrid, 28220, Spain.
| | - Miguel Ángel López
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, Ctra. Madrid-Barcelona, Km. 33.600, Alcalá de Henares, 28802, Madrid, Spain; Chemical Research Institute "Andrés M. Del Rio", University of Alcalá, Madrid, Spain
| | - Alberto Escarpa
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, Ctra. Madrid-Barcelona, Km. 33.600, Alcalá de Henares, 28802, Madrid, Spain; Chemical Research Institute "Andrés M. Del Rio", University of Alcalá, Madrid, Spain.
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Bu Y, Wang K, Yang X, Nie G. Sensitive dual-mode sensing platform for Amyloid β detection: Combining dual Z-scheme heterojunction enhanced photoelectrochemistry analysis and dual-wavelength ratiometric electrochemiluminescence strategy. Biosens Bioelectron 2023; 237:115507. [PMID: 37437453 DOI: 10.1016/j.bios.2023.115507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 06/19/2023] [Accepted: 06/30/2023] [Indexed: 07/14/2023]
Abstract
As a tumor biomarker, the accumulation of amyloid β oligomers (Aβo) in the brain has been suggested as a key feature in the pathogenesis and progression of Alzheimer's disease (AD). In this work, we designed a novel photoelectrochemical (PEC) and electrochemiluminescence resonance energy transfer (ECL-RET) dual-mode biosensor to achieve ultra-sensitive detection of Aβo. Specifically, the electrode surface modified Carbon Dots (C Dots) and the electrodeposited polyaniline (PANI) film formed a Z-scheme heterojunction reversing the photocurrent signal, and then the Aβo specific recognition peptide was attached to the surface via amide bonding between the amino group of PANI and carbonyl group of peptide. After that, in the presence of CdTe labeled specific recognition aptamer for Aβ (CdTe-Apt), Aβo was captured to construct a sandwich-type biosensor and exhibited a significantly enhanced cathodic photocurrent response because the formed dual Z-scheme heterojunction promoted charge separation efficiency. Interestingly, the proposed biosensor also caused a ratiometric change in the ECL intensity at 555 nm and 640 nm. Therefore, the developed biosensor achieved dual-mode detection of Aβo, where the PEC detection range of Aβo was from 10 fM to 0.1 μM (with a detection limit of 4.27 fM) and the ECL method provided a linear detection range of 10 fM to 10 nM (with a detection limit of 6.41 fM). The stability and reliability of the experimental results indicate that this has been a promising biosensing pattern and could be extended to the analysis of other biomarkers.
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Affiliation(s)
- Yuwei Bu
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Kun Wang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Xiaoyan Yang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
| | - Guangming Nie
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
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Ghaedamini H, Duanghathaipornsuk S, Onusko P, Binsheheween AM, Kim DS. Reduced Glutathione-Modified Electrode for the Detection of Hydroxyl Free Radicals. BIOSENSORS 2023; 13:254. [PMID: 36832020 PMCID: PMC9953857 DOI: 10.3390/bios13020254] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/05/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Hydroxyl radicals (•OH) are known as essential chemicals for cells to maintain their normal functions and defensive responses. However, a high concentration of •OH may cause oxidative stress-related diseases, such as cancer, inflammation, and cardiovascular disorders. Therefore, •OH can be used as a biomarker to detect the onset of these disorders at an early stage. Reduced glutathione (GSH), a well-known tripeptide for its antioxidant capacity against reactive oxygen species (ROS), was immobilized on a screen-printed carbon electrode (SPCE) to develop a real-time detection sensor with a high selectivity towards •OH. The signals produced by the interaction of the GSH-modified sensor and •OH were characterized using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The CV curve of the GSH-modified sensor in the Fenton reagent exhibited a pair of well-defined peaks, demonstrating the redox reaction of the electrochemical sensor and •OH. The sensor showed a linear relationship between the redox response and the concentration of •OH with a limit of detection (LOD) of 49 µM. Furthermore, using EIS studies, the proposed sensor demonstrated the capability of differentiating •OH from hydrogen peroxide (H2O2), a similar oxidizing chemical. After being immersed in the Fenton solution for 1 hr, redox peaks in the CV curve of the GSH-modified electrode disappeared, revealing that the immobilized GSH on the electrode was oxidized and turned to glutathione disulfide (GSSG). However, it was demonstrated that the oxidized GSH surface could be reversed back to the reduced state by reacting with a solution of glutathione reductase (GR) and nicotinamide adenine dinucleotide phosphate (NADPH), and possibly reused for •OH detection.
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Affiliation(s)
| | | | | | | | - Dong-Shik Kim
- Department of Chemical Engineering, University of Toledo, Toledo, OH 43606, USA
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4
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Potentiometric Biosensor Based on Artificial Antibodies for an Alzheimer Biomarker Detection. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12073625] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This paper presents a potentiometric biosensor for the detection of amyloid β-42 (Aβ-42) in point-of-care analysis. This approach is based on the molecular imprint polymer (MIP) technique, which uses covalently immobilised Aβ-42 to create specific detection cavities on the surface of single-walled carbon nanotubes (SWCNTs). The biosensor was prepared by binding Aβ-42 to the SWCNT surface and then imprinting it by adding acrylamide (monomer), N,N’-methylene-bis-acrylamide (crosslinker) and ammonium persulphate (initiator). The target peptide was removed from the polymer matrix by the proteolytic action of an enzyme (proteinase K). The presence of imprinting sites was confirmed by comparing a MIP-modified surface with a negative control (NIP) consisting of a similar material where the target molecule had been removed from the process. The ability of the sensing material to rebind Aβ-42 was demonstrated by incorporating the MIP material as an electroactive compound in a PVC/plasticiser mixture applied to a solid conductive support of graphite. All steps of the synthesis of the imprinted materials were followed by Raman spectroscopy and Fourier transform infrared spectroscopy (FTIR). The analytical performance was evaluated by potentiometric transduction, and the MIP material showed cationic slopes of 75 mV-decade−1 in buffer pH 8.0 and a detection limit of 0.72 μg/mL. Overall, potentiometric transduction confirmed that the sensor can discriminate Aβ-42 in the presence of other biomolecules in the same solution.
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Wang BY, Gu BC, Wang GJ, Yang YH, Wu CC. Detection of Amyloid-β(1–42) Aggregation With a Nanostructured Electrochemical Sandwich Immunoassay Biosensor. Front Bioeng Biotechnol 2022; 10:853947. [PMID: 35372290 PMCID: PMC8965719 DOI: 10.3389/fbioe.2022.853947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 02/25/2022] [Indexed: 11/30/2022] Open
Abstract
Amyloid-β(1–42) [Aβ(1–42)] oligomer accumulations are associated with physiologic alterations in the brains of individuals with Alzheimer’s disease. In this study, we demonstrate that a nanostructured gold electrode with deposited gold nanoparticles, induced via electrochemical impedance spectroscopy (EIS), may be used as an Aβ(1–42) conformation biosensor for the detection of Alzheimer’s disease. Monoclonal antibodies (12F4) were immobilized on self-assembled monolayers of the electrochemical sandwich immunoassay biosensor to capture Aβ(1–42) monomers and oligomers. Western blot and fluorescence microscopy analyses were performed to confirm the presence of Aβ(1–42) monomers and oligomers. EIS analysis with an equivalent circuit model was used to determine the concentrations of different Aβ(1–42) conformations in this study. We identified conformations of Aβ(1–42) monomers and Aβ(1–42) oligomers using probe antibodies (12F4) by employing EIS. RAβ(1−42) indicates the sum resistance of impedance measured during Aβ(1–42) immobilization. ΔR12F4 refers to the concentration of probe antibody (12F4) binding with Aβ(1–42). The concentration of Aβ(1–42) oligomer was defined as the percentage of Aβ(1–42) aggregation R12F4/RAβ(1−42). The experimental results show that the biosensor has high selectivity to differentiate Aβ(1–40) and Aβ(1–42) monomers and Aβ(1–42) oligomers and that it can detect Aβ(1–42) oligomer accurately. The linear detection range for Aβ(1–42) oligomers was between 10 pg/ml and 100 ng/ml. The limit of detection was estimated to be 113 fg/ml.
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Affiliation(s)
- Bing-Yu Wang
- Department of Mechanical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Bien-Chen Gu
- Department of Mechanical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Gou-Jen Wang
- Department of Mechanical Engineering, National Chung Hsing University, Taichung, Taiwan
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Yuan-Han Yang
- Department of and Master's Program in Neurology, Faculty of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Neurology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Neurology, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chia-Che Wu
- Department of Mechanical Engineering, National Chung Hsing University, Taichung, Taiwan
- Innovation and Development Center of Sustainable Agriculture (IDCSA), National Chung Hsing University, Taichung, Taiwan
- Smart Sustainable New Agriculture Research Center (SMARTer), Taichung, Taiwan
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Effects of Perilla frutescens var. acuta in amyloid β toxicity and Alzheimer's disease-like pathology in 5XFAD mice. Food Chem Toxicol 2022; 161:112847. [DOI: 10.1016/j.fct.2022.112847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 01/13/2022] [Accepted: 01/29/2022] [Indexed: 11/20/2022]
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Zhang L, Du X, Su Y, Niu S, Li Y, Liang X, Luo H. Quantitative assessment of AD markers using naked eyes: point-of-care testing with paper-based lateral flow immunoassay. J Nanobiotechnology 2021; 19:366. [PMID: 34789291 PMCID: PMC8597216 DOI: 10.1186/s12951-021-01111-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 11/02/2021] [Indexed: 01/01/2023] Open
Abstract
Aβ42 is one of the most extensively studied blood and Cerebrospinal fluid (CSF) biomarkers for the diagnosis of symptomatic and prodromal Alzheimer's disease (AD). Because of the heterogeneity and transient nature of Aβ42 oligomers (Aβ42Os), the development of technologies for dynamically detecting changes in the blood or CSF levels of Aβ42 monomers (Aβ42Ms) and Aβ42Os is essential for the accurate diagnosis of AD. The currently commonly used Aβ42 ELISA test kits usually mis-detected the elevated Aβ42Os, leading to incomplete analysis and underestimation of soluble Aβ42, resulting in a comprised performance in AD diagnosis. Herein, we developed a dual-target lateral flow immunoassay (dLFI) using anti-Aβ42 monoclonal antibodies 1F12 and 2C6 for the rapid and point-of-care detection of Aβ42Ms and Aβ42Os in blood samples within 30 min for AD diagnosis. By naked eye observation, the visual detection limit of Aβ42Ms or/and Aβ42Os in dLFI was 154 pg/mL. The test results for dLFI were similar to those observed in the enzyme-linked immunosorbent assay (ELISA). Therefore, this paper-based dLFI provides a practical and rapid method for the on-site detection of two biomarkers in blood or CSF samples without the need for additional expertise or equipment.
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Affiliation(s)
- Liding Zhang
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China
- MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Xuewei Du
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, China
| | - Ying Su
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Shiqi Niu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China
- MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Yanqing Li
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China
- MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaohan Liang
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China
- MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Haiming Luo
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.
- MoE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China.
- , Wuhan, China.
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Dehdari Vais R, Yadegari H, Heli H, Sattarahmady N. A β-Amyloid (1-42) Biosensor Based on Molecularly Imprinted Poly-Pyrrole for Early Diagnosis of Alzheimer's Disease. J Biomed Phys Eng 2021; 11:215-228. [PMID: 33937128 PMCID: PMC8064131 DOI: 10.31661/jbpe.v0i0.1070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 01/23/2019] [Indexed: 11/16/2022]
Abstract
Background: Alzheimer’s disease (AD) is a common form of dementia, characterized by production and deposition of β-amyloid peptide in the brain.
Thus, β-amyloid peptide is a potentially promising biomarker used to diagnose and monitor the progression of AD. Objective: The study aims to develop a biosensor based on a molecularly imprinted poly-pyrrole for detection of β-amyloid. Material and Methods: In this experimental study, an imprinted poly-pyrrole was employed as an artificial receptor synthesized by electro-polymerization of pyrrole
on screen-printed carbon electrodes in the presence of β-amyloid. β-amyloid acts as a molecular template within the polymer. The biosensor was
evaluated by cyclic voltammetry using ferro/ferricyanide marker. The parameters influencing the biosensor performance, including electro-polymerization
cycle umbers and β-amyloid binding time were optimized to achieve the best biosensor sensitivity. Results: The β-amyloid binding affinity with the biosensor surface was evaluated by the Freundlich isotherm, and Freundlich
constant and exponent were obtained as 0.22 ng mL-1 and 10.60, respectively. The biosensor demonstrated a detection limit of 1.2 pg mL-1.
The biosensor was applied for β-amyloid determination in artificial cerebrospinal fluid. Conclusion: The biosensor is applicable for early Alzheimer’s disease detection.
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Affiliation(s)
- Rezvan Dehdari Vais
- PhD Candidate, Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hossein Yadegari
- PhD, Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada
| | - Hossein Heli
- PhD, Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Naghmeh Sattarahmady
- PhD, Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- PhD, Department of Medical Physics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Wang X, Gu X, Li L, Yu B, Lv L, Chen Q, Xu M. An excellent electrochemical aptasensor for amyloid-β oligomers based on a triple-helix aptamer switch via target-triggered signal transduction DNA displacement events. Anal Bioanal Chem 2021; 413:3707-3716. [PMID: 33861355 DOI: 10.1007/s00216-021-03319-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 03/23/2021] [Accepted: 03/30/2021] [Indexed: 12/17/2022]
Abstract
An excellent aptasensor for electrochemical detection of amyloid-β oligomers (AβOs) at trace levels was fabricated based on a triple-helix aptamer switch (THAS) via target-triggered signal transduction DNA displacement events. Specifically, a single-stranded anti-AβO aptamer (Apt) carrying two symmetrical arm segments was first attached via Au-S binding to an Au electrode. Gold nanoparticle (GNP)-tagged signal transduction probes (GNP-STPs) were simultaneously hybridized with the two arm segments of the Apt, and a rigid THAS was formed on the Au electrode. Compared to the conventional hybrid, the number of GNPs on the Au electrode increased significantly with the THAS, effectively improving the stability of the Apt to avoid lodging. Trithiocyanuric acid (TA) was utilized to further gather the GNPs and form network-like TA/GNPs. As a result, the differential pulse voltammetry (DPV) response of GNPs was clearly enhanced. When AβOs were present, target-triggered signal transduction DNA displacement events were carried out from THAS via the reaction of the Apt with the AβOs, which caused the GNP-STP to dissociate from the Au electrode, and thus a significant reduction in the DPV response was observed. The assay was able to sensitively detect trace AβOs by monitoring the AβO-controlled DPV response change. It exhibited a wide linear range from 1 fM to 10 pM with a low detection limit of 0.5 fM, and was successfully employed for the determination of AβOs in 20 serum samples, with good recovery. Moreover, the developed assay can provide a sensitive and selective platform for many studies or investigations related to Alzheimer's disease (AD) monitoring and treatment.
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Affiliation(s)
- Xiaoying Wang
- Key Laboratory of the Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China.
| | - Xuan Gu
- Key Laboratory of the Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Linyu Li
- Key Laboratory of the Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Bingjia Yu
- Key Laboratory of the Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Liangrui Lv
- Key Laboratory of the Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Qingqing Chen
- Key Laboratory of the Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Mingming Xu
- Key Laboratory of the Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
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Qiu Z, Shen Q, Jiang C, Yao L, Sun X, Li J, Duan C, Li R, Li X, Gopinath SCB, Anbu P, Lakshmipriya T, Li X. Alzheimer's Disease Determination by a Dual Probe on Gold Nanourchins and Nanohorn Hybrids. Int J Nanomedicine 2021; 16:2311-2322. [PMID: 33776435 PMCID: PMC7989959 DOI: 10.2147/ijn.s302396] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/01/2021] [Indexed: 12/16/2022] Open
Abstract
Background Alzheimer’s disease (AD) is a neurodegenerative chronic disorder that causes dementia and problems in thinking, cognitive impairment and behavioral changes. Amyloid-beta (Aβ) is a peptide involved in AD progression, and a high level of Aβ is highly correlated with severe AD. Identifying and quantifying Aβ levels helps in the early treatment of AD and reduces the factors associated with AD. Materials and Methods This research introduced a dual probe detection system involving aptamers and antibodies to identify Aβ. Aptamers and antibodies were attached to the gold (Au) urchin and hybrid on the carbon nanohorn-modified surface. The nanohorn was immobilized on the sensor surface by using an amine linker, and then a Au urchin dual probe was immobilized. Results This dual probe-modified surface enhanced the current flow during Aβ detection compared with the surface with antibody as the probe. This dual probe interacted with higher numbers of Aβ peptides and reached the detection limit at 10 fM with R2=0.992. Furthermore, control experiments with nonimmune antibodies, complementary aptamer sequences and control proteins did not display the current responses, indicating the specific detection of Aβ. Conclusion Aβ-spiked artificial cerebrospinal fluid showed a similar response to current changes, confirming the selective identification of Aβ.
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Affiliation(s)
- Zhengguo Qiu
- Department of Anesthesiology, Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine, Xianyang, Shaanxi, 712000, People's Republic of China
| | - Qianhe Shen
- Department of Anesthesiology, Xi'an GemFlower Changqing Hospital, Xi'an, Shaanxi, 710200, People's Republic of China
| | - Chao Jiang
- The Third Department of Neurology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, 710038, People's Republic of China
| | - Li Yao
- Department of Neurology, The Hospital of Xidian Group, Xi'an, Shaanxi, 710077, People's Republic of China
| | - Xiaopeng Sun
- Department of Otolaryngology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, 710038, People's Republic of China
| | - Jing Li
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, 710038, People's Republic of China
| | - Chongzhen Duan
- Department of Anesthesiology, Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine, Xianyang, Shaanxi, 712000, People's Republic of China
| | - Rui Li
- Department of Anesthesiology, Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine, Xianyang, Shaanxi, 712000, People's Republic of China
| | - Xiuli Li
- Department of Anesthesiology, Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine, Xianyang, Shaanxi, 712000, People's Republic of China
| | - Subash C B Gopinath
- Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis (UniMAP), Arau, Perlis, 02600, Malaysia.,Institute of Nano Electronic Engineering, Universiti Malaysia Perlis (UniMAP), Kangar, 01000, Malaysia
| | - Periasamy Anbu
- Department of Biological Engineering, College of Engineering, Inha University, Incheon, 402-751, Republic of Korea
| | - Thangavel Lakshmipriya
- Institute of Nano Electronic Engineering, Universiti Malaysia Perlis (UniMAP), Kangar, 01000, Malaysia
| | - Xu Li
- Department of Surgery and Anesthesiology, Xi'an Hospital of Traditional Chinese Medicine, Xi'an, Shaanxi, People's Republic of China
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Determination of plasma β-amyloids by rolling circle amplification chemiluminescent immunoassay for noninvasive diagnosis of Alzheimer's disease. Mikrochim Acta 2021; 188:24. [PMID: 33404755 DOI: 10.1007/s00604-020-04650-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 11/15/2020] [Indexed: 02/06/2023]
Abstract
A rolling circle amplification chemiluminescence immunoassay (RCA-CLIA) was developed for precise quantitation of Aβ in plasma. Capture antibodies conjugated with magnetic beads and detection antibodies with collateral single-stranded DNA (ssDNA) were bound to Aβ42/Aβ40 antigens to form a typical double-antibody sandwich structure. The RCA reaction was triggered by the addition of ssDNA, which generated products with a large number of sites for the binding of acridinium ester (AE)-labeled detection probes, thereby realizing the purpose of the amplification. The RCA-CLIA method had higher sensitivity than conventional CLIA without loss of specificity. Under optimum conditions, the linear range of Aβ42 and Aβ40 detection was 3.9-140 pg/mL and 3.9-180 pg/mL, respectively, with corresponding low detection limits of 1.99 pg/mL and 3.14 pg/mL, respectively. Plasma Aβ42 and Aβ40 were detected in the blood of 21 AD patients and 22 healthy people, wherein this ratio could significantly distinguish AD patients from healthy individuals with a sensitivity of 90.48% and specificity of 63.64% for a cutoff value of 154. The Aβ42/Aβ40 ratio of plasma acts as an accurate indicator for AD diagnosis; therefore, detection of plasma Aβ using the RCA-CLIA exhibits great potential in noninvasive diagnosis and progressive assessment of AD.
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12
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g-C3N4-heme bound to amyloid β peptides: In-situ generation of the secondary co-reactant for dual-enhanced electrochemiluminescence assay of amyloid β detection. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.137096] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Mobed A, Hasanzadeh M. Biosensing: The best alternative for conventional methods in detection of Alzheimer's disease biomarkers. Int J Biol Macromol 2020; 161:59-71. [PMID: 32504710 DOI: 10.1016/j.ijbiomac.2020.05.257] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 05/26/2020] [Accepted: 05/28/2020] [Indexed: 11/29/2022]
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14
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Palla G, Malecka K, Dehaen W, Radecki J, Radecka H. Immunosensor incorporating half-antibody fragment for electrochemical monitoring of amyloid-β fibrils in artificial blood plasma. Bioelectrochemistry 2020; 137:107643. [PMID: 32891964 DOI: 10.1016/j.bioelechem.2020.107643] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 08/25/2020] [Accepted: 08/25/2020] [Indexed: 02/06/2023]
Abstract
In this report, an electrochemical immunosensor for the selective and sensitive monitoring of Aβ1-42 fibrils is presented. The sensing platform was prepared by the formation of a 4,4'-thiobisbenzenethiol (TBBT) self-assembled monolayer on a clean gold surface followed by the covalent entrapment of gold nanoparticles (AuNPs). The half-antibody fragments of the Anti-Amyloid Fibrils antibody were immobilized on AuNPs via S-Au covalent bonds. Each step of immunosensor fabrication was characterized with cyclic voltammetry and electrochemical impedance spectroscopy. The biosensor was successfully used for the sensing of Aβ1-42 fibrils in both phosphate saline buffer (PBS) and artificial blood plasma (ABP). The immunosensor sensitivity estimated based on calibration slopes was better in the presence of APP in the comparison to PBS. The LOD values obtained for both measuring media were of 0.6 pM level. The moderate response towards Aβ1-42 oligomers demonstrated the immunosensor selectivity.
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Affiliation(s)
- Gopal Palla
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima Str. 10, 10-748 Olsztyn, Poland
| | - Kamila Malecka
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima Str. 10, 10-748 Olsztyn, Poland
| | - Wim Dehaen
- University of Leuven, Department of Chemistry, Celestijnenlaan 200f - box 2404, 3001 Leuven, Belgium
| | - Jerzy Radecki
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima Str. 10, 10-748 Olsztyn, Poland
| | - Hanna Radecka
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima Str. 10, 10-748 Olsztyn, Poland.
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15
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Jamerlan A, An SSA, Hulme J. Advances in amyloid beta oligomer detection applications in Alzheimer's disease. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115919] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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16
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Kondzior M, Grabowska I. Antibody-Electroactive Probe Conjugates Based Electrochemical Immunosensors. SENSORS (BASEL, SWITZERLAND) 2020; 20:E2014. [PMID: 32260217 PMCID: PMC7180895 DOI: 10.3390/s20072014] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 03/31/2020] [Accepted: 04/01/2020] [Indexed: 12/12/2022]
Abstract
Suitable immobilization of a biorecognition element, such as an antigen or antibody, on a transducer surface is essential for development of sensitive and analytically reliable immunosensors. In this review, we report on (1) methods of antibody prefunctionalization using electroactive probes, (2) methods for immobilization of such conjugates on the surfaces of electrodes in electrochemical immunosensor construction and (3) the use of antibody-electroactive probe conjugates as bioreceptors and sensor signal generators. We focus on different strategies of antibody functionalization using the redox active probes ferrocene (Fc), anthraquinone (AQ), thionine (Thi), cobalt(III) bipyridine (Co(bpy)33+), Ru(bpy)32+ and horseradish peroxidase (HRP). In addition, new possibilities for antibody functionalization based on bioconjugation techniques are presented. We discuss strategies of specific, quantitative antigen detection based on (i) a sandwich format and (ii) a direct signal generation scheme. Further, the integration of different nanomaterials in the construction of these immunosensors is presented. Lastly, we report the use of a redox probe strategy in multiplexed analyte detection.
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Affiliation(s)
| | - Iwona Grabowska
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima 10, 10-748 Olsztyn, Poland;
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Deng C, Liu H, Si S, Zhu X, Tu Q, Jin Y, Xiang J. An electrochemical aptasensor for amyloid-β oligomer based on double-stranded DNA as "conductive spring". Mikrochim Acta 2020; 187:239. [PMID: 32189141 DOI: 10.1007/s00604-020-4217-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 03/06/2020] [Indexed: 02/06/2023]
Abstract
In order to overcome the antibody-based sensor's shortcomings, an electrochemical aptamer (Apt)-based sensor was developed for amyloid-β40 oligomer (Aβ40-O). The aptasensor was constructed by locating Apt and ferrocence (Fc) on streptavidin-modified gold (SA-gold) nanoparticles. The obtained AptFc@SA-gold nanoparticles were linked onto the Au electrode via the connection of double-stranded DNA (dsDNA) as a "conductive spring." The determination of Aβ40-O was performed with square-wave voltammetry (SWV). Upon bio-recognition between Apt and Aβ40-O, the conformation of Apt changed and the formed Apt/Aβ40-O complex separated from the SA-gold surface. As a result, the surface charge of SA-gold positively shifted, weakening the electrostatic attraction between the SA-gold and the positively charged Au electrode surface (at potential range of 0.1~0.5 V, corresponding to the Fc redox transformation), and stretching the dsDNA chain. Based on the exponential decay of dsDNA's electron transfer efficiency on its chain stretching, the oxidation current density from Fc decreased and displayed linear correlation to the concentration of Aβ40-O. A wide linear range of 0.100 nM to 1.00 μM with a low detection limit of 93.0 pM was obtained. The aptasensor displayed excellent selectivity toward Aβ40-O in contrast to other possible interfering analogs (Aβ40 monomer, Aβ42 monomer, and oligomer) at × 100 higher concentrations. The recoveries for Aβ40-O-spiked artificial cerebrospinal fluid and healthy human serum were 94.0~104% and 92.8~95.4%, respectively. The electrochemical aptasensor meets the demands of clinic determination of Aβ40-O, which is significant for the early diagnosis of AD. Graphical abstract Schematic representation of the electrochemical aptasensor for amyloid-β oligomer based on the surface charge change induced by target binding.
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Affiliation(s)
- Chunyan Deng
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Hui Liu
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Shihui Si
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Xiaojun Zhu
- School of Information Science and Technology, Nantong University, Nantong, 226019, Jiangsu, People's Republic of China
| | - Qiuyun Tu
- Department of Geratology, The Third Xiangya Hospital, Central South University, Changsha, 410013, People's Republic of China
| | - Yan Jin
- Department of Geratology, The Third Xiangya Hospital, Central South University, Changsha, 410013, People's Republic of China
| | - Juan Xiang
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China.
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Zheng Y, Geng X, Yang X, Li S, Liu Y, Liu X, Wang Q, Wang K, Jia R, Xu Y. Exploring Interactions of Aptamers with Aβ 40 Amyloid Aggregates and Its Application: Detection of Amyloid Aggregates. Anal Chem 2020; 92:2853-2858. [PMID: 31916749 DOI: 10.1021/acs.analchem.9b05493] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The exhaustive investigating interactions between recognition probes and amyloid aggregates, especially simultaneous recognition events, are challenging and crucial for the design of biosensing probes and further diagnosis of amyloid diseases. In the present work, the interactions of aptamers (Apts) with β-amyloid (Aβ) aggregates were explored thoroughly by single-molecule force spectroscopy (SMFS). Indeed, it was found that the interaction of aptamer1 (Apt1)-amyloid aggregates was different from that of aptamer2 (Apt2)-Aβ40 aggregates at the single-molecule level. Especially, the interaction force of Apt1-Aβ40 fibril showed a double distinguishing Gaussian fitting. The only unimodal distribution of the force histogram was displayed for the interactions of Apt2-Aβ40 oligomer, Apt2-Aβ40 fibril, and Apt1-Aβ40 oligomer. More intriguingly, two Apts could bind to amyloid aggregates simultaneously. With the assistance of two Apts recognition, a novel sensitive dual Apt-based surface plasmon resonance (SPR) sensor using Au nanoparticles (AuNPs) was developed for quantifying Aβ40 aggregates. The dual Apt-based SPR sensor not only avoided the limitation of steric hindrance and epitope but also employed simple operation as well as inexpensive recognition probes. A detection limit as low as 0.2 pM for Aβ40 oligomer and 0.05 pM for Aβ40 fibril could be achieved. Moreover, the established sensor could be successfully applied to detect Aβ40 aggregates in artificial cerebrospinal fluid (CSF) and undiluted real CSF. This work could provide a strategy to monitor a simultaneous recognition event using SMFS and broaden the application of Apts in the diagnosis of neurodegenerative diseases.
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Affiliation(s)
- Yan Zheng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province , Hunan University , Changsha 410082 , P. R. China
| | - Xiuhua Geng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province , Hunan University , Changsha 410082 , P. R. China
| | - Xiaohai Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province , Hunan University , Changsha 410082 , P. R. China
| | - Shaoyuan Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province , Hunan University , Changsha 410082 , P. R. China
| | - Yaqin Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province , Hunan University , Changsha 410082 , P. R. China
| | - Xiaofeng Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province , Hunan University , Changsha 410082 , P. R. China
| | - Qing Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province , Hunan University , Changsha 410082 , P. R. China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province , Hunan University , Changsha 410082 , P. R. China
| | - Ruichen Jia
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province , Hunan University , Changsha 410082 , P. R. China
| | - Yao Xu
- Huaihe Hospital of Henan University , Henan University , Kaifeng 475001 , P. R. China
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Huang Y, Sinha A, Zhao H, Dang X, Zhang Y, Quan X. Real Time Detection of Hazardous Hydroxyl Radical Using an Electrochemical Approach. ChemistrySelect 2019. [DOI: 10.1002/slct.201902512] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yujin Huang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China)School of Environmental Science and TechnologyDalian University of Technology Linggong Road 2 Dalian 116024 P.R. China
| | - Ankita Sinha
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China)School of Environmental Science and TechnologyDalian University of Technology Linggong Road 2 Dalian 116024 P.R. China
| | - Huimin Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China)School of Environmental Science and TechnologyDalian University of Technology Linggong Road 2 Dalian 116024 P.R. China
| | - Xueming Dang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China)School of Environmental Science and TechnologyDalian University of Technology Linggong Road 2 Dalian 116024 P.R. China
| | - Yaobin Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China)School of Environmental Science and TechnologyDalian University of Technology Linggong Road 2 Dalian 116024 P.R. China
| | - Xie Quan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China)School of Environmental Science and TechnologyDalian University of Technology Linggong Road 2 Dalian 116024 P.R. China
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20
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Su H, Li S, Kerman K. Novel thiolated-PEG linker molecule for biosensor development on gold surfaces. Biosens Bioelectron 2019; 141:111477. [DOI: 10.1016/j.bios.2019.111477] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 06/05/2019] [Accepted: 06/24/2019] [Indexed: 01/01/2023]
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21
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Zeng N, Xiang J. Detection of KRAS G12D point mutation level by anchor-like DNA electrochemical biosensor. Talanta 2019; 198:111-117. [DOI: 10.1016/j.talanta.2019.01.105] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/25/2019] [Accepted: 01/29/2019] [Indexed: 01/04/2023]
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22
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Amouzadeh Tabrizi M, Ferré-Borrull J, Marsal LF. Highly sensitive aptasensor based on interferometric reflectance spectroscopy for the determination of amyloid β as an Alzheimer's disease biomarkers using nanoporous anodic alumina. Biosens Bioelectron 2019; 137:279-286. [PMID: 31125817 DOI: 10.1016/j.bios.2019.04.050] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/08/2019] [Accepted: 04/23/2019] [Indexed: 02/06/2023]
Abstract
It is well known that Alzheimer's disease is one of the global challenges for the 21st century. Therefore, it is urgent to develop a reliable biosensor for the detection of this disease. Here in, we have developed for the first time, an aptasensor based on interferometric reflectance spectroscopy (IRS) for the determination of amyloid β (Aβ) oligomers that is an Alzheimer's disease biomarker. For this purpose, the nanoporous anodic alumina (NAA) was first fabricated. After that, the pore walls of the NAA were modified with (3-aminopropyl) trimethoxysilane (NAA-NH2). The amino-terminal aptamers probe were then attached to the pore walls of the NAA-NH2 by using glutaraldehyde (GA) as the cross-linking agent. Subsequently, methylene blue (MB) was immobilized into the aptamer as the photo-probe, generating the MB/G-quadruplex complex. Since MB has a high absorption coefficient, the intensity of the reflected white light to the charge-coupled device (CCD) detector decreased. In the presence of the Aβ oligomers that have high affinity to the immobilized aptamer, the MB/quadruplex complex broke and MB washed away from the aptasensor. Therefore, the intensity of the reflected white light to the CCD detector increased. The increased signal intensity of the aptasensor has a logarithmic relationship with the concentration of Aβ oligomers. The proposed aptasensor exhibited a good response to the concentration of Aβ oligomers in the range of 0.5-50.0 μg × mL-1. The experimental detection limit was of 0.02 μg × mL-1 (at 3σ/S). The proposed optical aptasensor exhibited good selectivity, linear range, and stability.
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Affiliation(s)
- Mahmoud Amouzadeh Tabrizi
- Departamento de Ingeniería Electrónica, Eléctrica y Automática, Universitat Rovira i Virgili, Avda. Països Catalans 26, 43007 Tarragona, Spain
| | - Josep Ferré-Borrull
- Departamento de Ingeniería Electrónica, Eléctrica y Automática, Universitat Rovira i Virgili, Avda. Països Catalans 26, 43007 Tarragona, Spain
| | - Lluis F Marsal
- Departamento de Ingeniería Electrónica, Eléctrica y Automática, Universitat Rovira i Virgili, Avda. Països Catalans 26, 43007 Tarragona, Spain.
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23
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Yu Y, Yin T, Peng Q, Kong L, Li C, Tang D, Yin X. Simultaneous Monitoring of Amyloid-β (Aβ) Oligomers and Fibrils for Effectively Evaluating the Dynamic Process of Aβ Aggregation. ACS Sens 2019; 4:471-478. [PMID: 30693761 DOI: 10.1021/acssensors.8b01493] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Herein, we provide a proof of concept for a novel strategy that targets the assessment of the aggregation of amyloid-β (Aβ) by simultaneously determining its oligomers (Aβo) and fibrils (Aβf) in one analytical system. By fabricating and combining two immunosensors for Aβo and Aβf, respectively, we constructed a two-channel electrochemical system. The ratio of Aβf to Aβo was calculated and taken as a possible criterion for evaluating the extent of aggregation. Thereby, the presence of and transformation between oligomers and fibrils were accurately probed by incubating the Aβ monomer for different times and then calculating the ratios of Aβf to Aβo. The applicability of this method was further validated by tracking the dynamic progress of Aβ aggregation in the cerebrospinal fluid and tissues of Alzheimer's disease (AD) rats, which revealed that the ratio of Aβf to Aβo in rat brain gradually increased with the progression of AD, which was indicative of the severity of peptide aggregation during this process. Overall, this study represents the first example of a quantitative strategy for precisely evaluating the aggregation process that is related to pathological events in AD brain.
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Affiliation(s)
- Yanyan Yu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221004, Jiangsu, P. R. China
- Department of Pharmaceutical Analysis, School of Pharmacy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221004, Jiangsu, P. R. China
| | - Tianxiao Yin
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221004, Jiangsu, P. R. China
| | - Qiwen Peng
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221004, Jiangsu, P. R. China
| | - Lingna Kong
- Department of Chemistry, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China
| | - Chenglin Li
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221004, Jiangsu, P. R. China
| | - Daoquan Tang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221004, Jiangsu, P. R. China
- Department of Pharmaceutical Analysis, School of Pharmacy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221004, Jiangsu, P. R. China
| | - Xiaoxing Yin
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221004, Jiangsu, P. R. China
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24
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Construction and Electrochemical Property Studies of DNA Duplexes Tethered to Gold Electrode via Au−C Bond. ELECTROANAL 2018. [DOI: 10.1002/elan.201800673] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Su H, Jin Y, Noroozifar M, Kerman K. Electrochemical Detection of Isoform‐Specific Interaction between Apolipoprotein E and Amyloid‐β. ChemElectroChem 2018. [DOI: 10.1002/celc.201800985] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Han Su
- Department of Physical and Environmental SciencesUniversity of Toronto Scarborough Toronto Ontario M1 C 1 A4 Canada
| | - Yiyun Jin
- Department of Physical and Environmental SciencesUniversity of Toronto Scarborough Toronto Ontario M1 C 1 A4 Canada
| | - Meissam Noroozifar
- Department of ChemistryUniversity of Sistan and Baluchestan Zahedan Iran
| | - Kagan Kerman
- Department of Physical and Environmental SciencesUniversity of Toronto Scarborough Toronto Ontario M1 C 1 A4 Canada
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26
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Deng C, Zhang M, Liu C, Deng H, Huang Y, Yang M, Xiang J, Ren B. Electrostatic Force Triggering Elastic Condensation of Double-Stranded DNA for High-Performance One-Step Immunoassay. Anal Chem 2018; 90:11446-11452. [PMID: 30178657 DOI: 10.1021/acs.analchem.8b02556] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Current strategies for high-performance immunoassay generally require a sandwich structure for signal amplification. This strategy is limited to multivalent antigens and complicates the detection scheme. Herein we demonstrate a class of simple one-step ultrasensitive immunoassay with the adoption of double-stranded DNA (dsDNA) as "conductive spring" to bridge the electrode and redox-reporter/antibody-receptor comodified gold nanoparticles (AbFc@AuNPs). Upon biorecognition between antigen and antibody, the charge of the AuNPs changes, enhancing the electrostatic interaction between the AuNPs and Au electrode surface, and condensing the dsDNA chain. For the first time, the sensitive response of the electrochemical redox current to the DNA chain length is utilized to achieve an ultrahigh sensitivity down to fM level. Only the primary antibody needed in the recognition interface ensures the one-step immunoreaction works well with monovalent antigens, which ensure this method as a promising general alternative means for fast, high-throughput or point-of-care clinical applications even for very challenging clinically relevant samples.
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Affiliation(s)
- Chunyan Deng
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China
| | - Manman Zhang
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China
| | - Chunyan Liu
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China
| | - Honghua Deng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering , Hunan University , Changsha 410082 , P. R. China
| | - Yan Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering , Hunan University , Changsha 410082 , P. R. China
| | - Minghui Yang
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China
| | - Juan Xiang
- College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , P. R. China
| | - Bin Ren
- Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, and The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , P. R. China
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27
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Biosensors for the Detection of Interaction between Legionella pneumophila Collagen-Like Protein and Glycosaminoglycans. SENSORS 2018; 18:s18082668. [PMID: 30110899 PMCID: PMC6111780 DOI: 10.3390/s18082668] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 08/08/2018] [Accepted: 08/10/2018] [Indexed: 01/18/2023]
Abstract
The adhesin Legionella collagen-like (Lcl) protein can bind to extracellular matrix components and mediate the binding of Legionella pneumophila to host cells. In this study, electrochemical impedance spectroscopy (EIS) and surface plasmon resonance (SPR)-based biosensors were employed to characterize these interactions between glycosaminoglycans (GAGs) and the adhesin Lcl protein. Fucoidan displayed a high affinity (KD 18 nM) for Lcl protein. Chondroitin sulfate A and dermatan sulfate differ in the position of a carboxyl group replacing D-glucuronate with D-iduronate. Our results indicated that the presence of D-iduronate in dermatan sulfate strongly hindered its interaction with Lcl. These biophysical studies provided valuable information in our understanding of adhesin-ligand interactions related to Legionella pneumophila infections.
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28
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Yang Y, Giau VV, An SSA, Kim S. Plasma Oligomeric Beta Amyloid in Alzheimer's Disease with History of Agent Orange Exposure. Dement Neurocogn Disord 2018; 17:41-49. [PMID: 30906391 PMCID: PMC6427972 DOI: 10.12779/dnd.2018.17.2.41] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 01/20/2017] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND AND PURPOSE During the Vietnam War, many Korean soldiers were exposed to Agent Orange. Until now, there existed only limited evidence of association between exposure to Agent Orange and Alzheimer's disease (AD). The main pathological feature of AD is brain amyloidosis. To explore the pathophysiological characteristic of AD with Agent Orange exposure, we compared newly developed amyloid beta (Aβ) oligomer levels in plasma between AD with Agent Orange exposure and without exposure. METHODS We recruited 48 AD patients with Agent Orange exposure and 66 AD patients without Agent Orange. Using the Multimer Detection System technique, which was based on an enzyme-linked immunosorbent assay, we measured Aβ oligomers in the plasma of study subjects. RESULTS Compared to normal control patients, plasma Aβ oligomer levels were higher in AD patients regardless of history of Agent Orange exposure. However, AD patients with Agent Orange exposure showed higher plasma Aβ oligomer levels than AD patients without Agent Orange. DISCUSSION This study showed higher plasma Aβ oligomer levels in AD patients with Agent Orange exposure compared to AD patients without Agent Orange. This finding suggests the possibility of a different pathophysiology of AD patients with Agent Orange exposure from AD patients without Agent Orange.
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Affiliation(s)
- YoungSoon Yang
- Department of Neurology, Veterans Health Service Medical Center, Seoul, Korea
| | - Vo Van Giau
- Department of Bionano Technology, Gachon University, Seongnam, Korea
| | - Seong Soo A. An
- Department of Bionano Technology, Gachon University, Seongnam, Korea
| | - SangYun Kim
- Department of Neurology, Seoul National University College of Medicine & Neurocognitive Behavior Center, Seoul National University Bundang Hospital, Seongnam, Korea
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Jeong D, Kim J, Chae MS, Lee W, Yang SH, Kim Y, Kim SM, Lee JS, Lee JH, Choi J, Yoon DS, Hwang KS. Multifunctionalized Reduced Graphene Oxide Biosensors for Simultaneous Monitoring of Structural Changes in Amyloid-β 40. SENSORS 2018; 18:s18061738. [PMID: 29843431 PMCID: PMC6022081 DOI: 10.3390/s18061738] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 05/24/2018] [Accepted: 05/28/2018] [Indexed: 12/16/2022]
Abstract
Determination of the conformation (monomer, oligomer, or fibril) of amyloid peptide aggregates in the human brain is essential for the diagnosis and treatment of Alzheimer's disease (AD). Accordingly, systematic investigation of amyloid conformation using analytical tools is essential for precisely quantifying the relative amounts of the three conformations of amyloid peptide. Here, we developed a reduced graphene oxide (rGO) based multiplexing biosensor that could be used to monitor the relative amounts of the three conformations of various amyloid-β 40 (Aβ40) fluids. The electrical rGO biosensor was composed of a multichannel sensor array capable of individual detection of monomers, oligomers, and fibrils in a single amyloid fluid sample. From the performance test of each sensor, we showed that this method had good analytical sensitivity (1 pg/mL) and a fairly wide dynamic range (1 pg/mL to 10 ng/mL) for each conformation of Aβ40. To verify whether the rGO biosensor could be used to evaluate the relative amounts of the three conformations, various amyloid solutions (monomeric Aβ40, aggregated Aβ40, and disaggregated Aβ40 solutions) were employed. Notably, different trends in the relative amounts of the three conformations were observed in each amyloid solution, indicating that this information could serve as an important parameter in the clinical setting. Accordingly, our analytical tool could precisely detect the relative amounts of the three conformations of Aβ40 and may have potential applications as a diagnostic system for AD.
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Affiliation(s)
- Dahye Jeong
- Department of Clinical Pharmacology and Therapeutics, College of Medicine, Kyung Hee University, Seoul 02447, Korea.
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea.
| | - Jinsik Kim
- Department of Biomedical Engineering, Dongguk University, Seoul 04620, Korea.
| | - Myung-Sic Chae
- Department of Clinical Pharmacology and Therapeutics, College of Medicine, Kyung Hee University, Seoul 02447, Korea.
| | - Wonseok Lee
- Department of Biomedical Engineering, Yonsei University, Wonju 26493, Korea.
| | - Seung-Hoon Yang
- Systems Biotechnology Research Center, Korea Institute of Science and Technology (KIST), Gangnueung 25451, Korea.
| | - YoungSoo Kim
- Department of Pharmacy & Intergrated Science and Engineering Division, Yonsei University, Incheon 21983, Korea.
| | - Seung Min Kim
- Center for Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Korea.
| | - Jin San Lee
- Department of Neurology, Kyung Hee University Hospital, Seoul 02447, Korea.
| | - Jeong Hoon Lee
- Department of Electrical Engineering, Kwangwoon University, Seoul 01897, Korea.
| | - Jungkyu Choi
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Korea.
| | - Dae Sung Yoon
- Department of Biomedical Engineering, Korea University, Seoul 02841, Korea.
| | - Kyo Seon Hwang
- Department of Clinical Pharmacology and Therapeutics, College of Medicine, Kyung Hee University, Seoul 02447, Korea.
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30
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Cao L, Zhang Q, Dai H, Fu Y, Li Y. Separation/Concentration-signal-amplification in-One Method Based on Electrochemical Conversion of Magnetic Nanoparticles for Electrochemical Biosensing. ELECTROANAL 2018. [DOI: 10.1002/elan.201700653] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lulu Cao
- College of Biosystems Engineering and Food Science; Zhejiang University; Hangzhou 310058 China
| | - Qi Zhang
- College of Biosystems Engineering and Food Science; Zhejiang University; Hangzhou 310058 China
| | - Huang Dai
- College of Biosystems Engineering and Food Science; Zhejiang University; Hangzhou 310058 China
| | - Yingchun Fu
- College of Biosystems Engineering and Food Science; Zhejiang University; Hangzhou 310058 China
| | - Yanbin Li
- College of Biosystems Engineering and Food Science; Zhejiang University; Hangzhou 310058 China
- Department of Biological and Agricultural Engineering; University of Arkansas; Fayetteville, AR 72701 USA
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31
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Vasilescu A, Boulahneche S, Chekin F, Gáspár S, Medjram MS, Diagne AA, Singh SK, Kurungot S, Boukherroub R, Szunerits S. Porous reduced graphene oxide modified electrodes for the analysis of protein aggregation. Part 1: Lysozyme aggregation at pH 2 and 7.4. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.09.083] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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32
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Electrochemical immunoassay for amyloid-beta 1–42 peptide in biological fluids interfacing with a gold nanoparticle modified carbon surface. Catal Today 2017. [DOI: 10.1016/j.cattod.2017.02.039] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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33
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Li CZ, Grajales S, Shuang S, Dong C, Nair M. β-Amyloid Biomarker Detection for Alzheimer’s Disease. JOURNAL OF ANALYSIS AND TESTING 2017. [DOI: 10.1007/s41664-017-0014-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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34
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Xing Y, Feng XZ, Zhang L, Hou J, Han GC, Chen Z. A sensitive and selective electrochemical biosensor for the determination of beta-amyloid oligomer by inhibiting the peptide-triggered in situ assembly of silver nanoparticles. Int J Nanomedicine 2017; 12:3171-3179. [PMID: 28458538 PMCID: PMC5402878 DOI: 10.2147/ijn.s132776] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Soluble beta-amyloid (Aβ) oligomer is believed to be the most important toxic species in the brain of Alzheimer’s disease (AD) patients. Thus, it is critical to develop a simple method for the selective detection of Aβ oligomer with low cost and high sensitivity. In this paper, we report an electrochemical method for the detection of Aβ oligomer with a peptide as the bioreceptor and silver nanoparticle (AgNP) aggregates as the redox reporters. This strategy is based on the conversion of AgNP-based colorimetric assay into electrochemical analysis. Specifically, the peptide immobilized on the electrode surface and presented in solution triggered together the in situ formation of AgNP aggregates, which produced a well-defined electrochemical signal. However, the specific binding of Aβ oligomer to the immobilized peptide prevented the in situ assembly of AgNPs. As a result, a poor electrochemical signal was observed. The detection limit of the method was found to be 6 pM. Furthermore, the amenability of this method for the analysis of Aβ oligomer in serum and artificial cerebrospinal fluid (aCSF) samples was demonstrated.
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Affiliation(s)
- Yun Xing
- Henan Province of Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang.,School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, People's Republic of China
| | - Xiao-Zhen Feng
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, People's Republic of China
| | - Lipeng Zhang
- Henan Province of Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang
| | - Jiating Hou
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, People's Republic of China
| | - Guo-Cheng Han
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, People's Republic of China
| | - Zhencheng Chen
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi, People's Republic of China
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35
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Chen L, Liu X, Chen C. Impedimetric biosensor modified with hydrophilic material of tannic acid/polyethylene glycol and dopamine-assisted deposition for detection of breast cancer-related BRCA1 gene. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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36
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Impedimetric biosensor modified with hydrophilic material of tannic acid/polyethylene glycol and dopamine-assisted deposition for detection of breast cancer-related BRCA1 gene. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.03.001%2010.1016/j.jelechem.2017.03.016%2010.1016/j.jelechem.2017.03.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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37
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Olajos G, Bartus É, Schuster I, Lautner G, Gyurcsányi RE, Szögi T, Fülöp L, Martinek TA. Multivalent foldamer-based affinity assay for selective recognition of Aβ oligomers. Anal Chim Acta 2017; 960:131-137. [PMID: 28193356 DOI: 10.1016/j.aca.2017.01.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 01/04/2017] [Accepted: 01/10/2017] [Indexed: 10/20/2022]
Abstract
Mimicking the molecular recognition functionality of antibodies is a great challenge. Foldamers are attractive candidates because of their relatively small size and designable interaction surface. This paper describes a sandwich type enzyme-linked immunoassay with a tetravalent β-peptide foldamer helix array as capture element and enzyme labeled tracer antibodies. The assay was found to be selective to β-amyloid oligomeric species with surface features transiently present in ongoing aggregation. In optimized conditions, with special emphasis on the foldamer immobilization, a detection limit of 5 pM was achieved with a linear range of 10-500 pM. These results suggest that protein mimetic foldamers can be useful tools in biosensors and affinity assays.
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Affiliation(s)
- Gábor Olajos
- Institute of Pharmaceutical Analysis, University of Szeged, Somogyi u. 4, 6720 Szeged, Hungary
| | - Éva Bartus
- Institute of Pharmaceutical Analysis, University of Szeged, Somogyi u. 4, 6720 Szeged, Hungary
| | - Ildikó Schuster
- Department of Medical Chemistry, University of Szeged, Dóm tér 8, 6720 Szeged, Hungary
| | - Gergely Lautner
- MTA-BME Lendület Chemical Nanosensors Research Group, Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4, 1111 Budapest, Hungary
| | - Róbert E Gyurcsányi
- MTA-BME Lendület Chemical Nanosensors Research Group, Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4, 1111 Budapest, Hungary
| | - Titanilla Szögi
- Department of Medical Chemistry, University of Szeged, Dóm tér 8, 6720 Szeged, Hungary
| | - Lívia Fülöp
- Department of Medical Chemistry, University of Szeged, Dóm tér 8, 6720 Szeged, Hungary.
| | - Tamás A Martinek
- Institute of Pharmaceutical Analysis, University of Szeged, Somogyi u. 4, 6720 Szeged, Hungary.
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38
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Chi H, Keiderling TA. Structural Rearrangement from Oligomer to Fibril Detected with FRET in a Designed Amphiphilic Peptide. Chembiochem 2016; 18:195-205. [DOI: 10.1002/cbic.201600436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Indexed: 01/21/2023]
Affiliation(s)
- Heng Chi
- Department of Chemistry (M/C 111); University of Illinois at Chicago; 845 W. Taylor Street Chicago IL 60607 USA
- Department of Pharmacy; Jiangsu Food and Pharmaceutical Science College; 4 E. Meicheng Rd. Huai'an Jiangsu Province 223005 China
| | - Timothy A. Keiderling
- Department of Chemistry (M/C 111); University of Illinois at Chicago; 845 W. Taylor Street Chicago IL 60607 USA
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39
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Deng C, Pi X, Qian P, Chen X, Wu W, Xiang J. High-Performance Ratiometric Electrochemical Method Based on the Combination of Signal Probe and Inner Reference Probe in One Hairpin-Structured DNA. Anal Chem 2016; 89:966-973. [PMID: 27983797 DOI: 10.1021/acs.analchem.6b04209] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
In this work, the dual signal-tagged hairpin structured DNA (dhDNA)-based ratiometric probe was developed by the combination of ferrocene-labeled signal probe (Fc-sP) and methylene blue-modified inner reference probe (MB-rP) in one hairpin-structured DNA. On the basis of this, a high-performance ratiometric electrochemical method was proposed for biomarker detection. In contrast to the conventional ratiometric electrochemical probe, this dhDNA ratiometric probe integrated sP and rP into one structure, which ensured the completely same modification condition and the interdependence of sP and rP on one sensing interface. As a result, the dhDNA ratiometric probe possesses a stronger ability to eliminate the disturbance of environmental change, which was proven by the fact that the changes of the surface roughness and pH value had no significant effects on the reproducibility and stability of the sensor. Moreover, in the proposed strategy, the initial ratio responses of Fc-sP to MB-rP ((IFc-sP/IMB-rP)0) are controllable and can be kept constant at 1:1, which is favorable for the increase in signal-to-noise ratio and sensitivity. When the sequence of Fc-sP is designed as the aptamer of mucin 1 (MUC1), the dhDNA ratiometric sensor with signal amplification of Au nanoparticles becomes feasible for the sensitive detection of MUC1 by one-step incubation procedure. Compared with the conventional ratiometric sensor, the proposed dhDNA sensor has higher reproducibility, accuracy, stability, sensitivity, and simplicity, which are significant for the development of the sensor in various fields for practical applications.
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Affiliation(s)
- Chunyan Deng
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, People's Republic of China
| | - Xiaomei Pi
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, People's Republic of China
| | - Pin Qian
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, People's Republic of China
| | - Xiaoqing Chen
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, People's Republic of China
| | - Wuming Wu
- College of Optoelectriconic Science and Engineering, National University of Defense Technology , Changsha 410073, China
| | - Juan Xiang
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, People's Republic of China
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40
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Zhou Y, Zhang H, Liu L, Li C, Chang Z, Zhu X, Ye B, Xu M. Fabrication of an antibody-aptamer sandwich assay for electrochemical evaluation of levels of β-amyloid oligomers. Sci Rep 2016; 6:35186. [PMID: 27725775 PMCID: PMC5057102 DOI: 10.1038/srep35186] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 09/26/2016] [Indexed: 01/21/2023] Open
Abstract
Amyloid β-peptide (Aβ) in its oligomeric form is often considered as the most toxic species in Alzheimer's disease (AD), and thus Aβ oligomer is a potentially promising candidate biomarker for AD diagnosis. The development of a sensitive and reliable method for monitoring the Aβ oligomer levels in body fluids is an urgent requirement in order to predict the severity and progression at early or preclinical stages of AD. Here, we show a proof of concept for a sensitive and specific detection of Aβ oligomers by an antibody-aptamer sandwich assay. The antibodies of Aβ oligomers and a nanocomposite of gold nanoparticles with aptamer and thionine (aptamer-Au-Th) were used as the recognition element and the detection probe for specifically binding to Aβ oligomers, respectively. The electrochemical signal of Th reduction could provide measurable electrochemical signals, and a low limit of detection (100 pM) was achieved due to the signal amplification by high loading of Th on the gold nanoparticles. The feasibility of the assay was verified by test of Aβ oligomers in artificial cerebrospinal fluid. The proposed strategy presents valuable information related to early diagnosis of AD process.
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Affiliation(s)
- Yanli Zhou
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, P. R. China.,College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Huanqing Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Lantao Liu
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, P. R. China
| | - Congming Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Zhu Chang
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, P. R. China
| | - Xu Zhu
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, P. R. China
| | - Baoxian Ye
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Maotian Xu
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, P. R. China.,College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
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41
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Deane CAS, Brown IR. Induction of heat shock proteins in differentiated human neuronal cells following co-application of celastrol and arimoclomol. Cell Stress Chaperones 2016; 21:837-48. [PMID: 27273088 PMCID: PMC5003800 DOI: 10.1007/s12192-016-0708-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 05/30/2016] [Accepted: 05/31/2016] [Indexed: 01/19/2023] Open
Abstract
Few effective therapies exist for the treatment of neurodegenerative diseases that have been characterized as protein misfolding disorders. Upregulation of heat shock proteins (Hsps) mitigates against the accumulation of misfolded, aggregation-prone proteins and synaptic dysfunction, which is recognized as an early event in neurodegenerative diseases. Enhanced induction of a set of Hsps in differentiated human SH-SY5Y neuronal cells was observed following co-application of celastrol and arimoclomol, compared to their individual application. The dosages employed did not affect cell viability or neuronal process morphology. The induced Hsps included the little studied HSPA6 (Hsp70B'), a potentially neuroprotective protein that is present in the human genome but not in rat and mouse and hence is missing in current animal models of neurodegenerative disease. Enhanced induction of HSPA1A (Hsp70-1), DNAJB1 (Hsp40), HO-1 (Hsp32), and HSPB1 (Hsp27) was also observed. Celastrol activates heat shock transcription factor 1 (HSF1), the master regulator of Hsp gene transcription, and also exhibits potent anti-inflammatory and anti-oxidant activities. Arimoclomol is a co-activator that prolongs the binding of activated HSF1 to heat shock elements (HSEs) in the promoter regions of inducible Hsp genes. Elevated Hsp levels peaked at 10 to 12 h for HSPA6, HSPA1A, DNAJB1, and HO-1 and at 24 h for HSPB1. Co-application of celastrol and arimoclomol induced higher Hsp levels compared to heat shock paired with arimoclomol. The co-application strategy of celastrol and arimoclomol targets multiple neurodegenerative disease-associated pathologies including protein misfolding and protein aggregation, inflammatory and oxidative stress, and synaptic dysfunction.
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Affiliation(s)
- Catherine A S Deane
- Centre for the Neurobiology of Stress, Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
| | - Ian R Brown
- Centre for the Neurobiology of Stress, Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada.
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42
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Xia N, Wang X, Zhou B, Wu Y, Mao W, Liu L. Electrochemical Detection of Amyloid-β Oligomers Based on the Signal Amplification of a Network of Silver Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2016; 8:19303-19311. [PMID: 27414520 DOI: 10.1021/acsami.6b05423] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Amyloid-β oligomers (AβOs) are the most important toxic species in the brain of Alzheimer's disease (AD) patient. AβOs, therefore, are considered reliable molecular biomarkers for the diagnosis of AD. Herein, we reported a simple and sensitive electrochemical method for the selective detection of AβOs using silver nanoparticles (AgNPs) as the redox reporters and PrP(95-110), an AβOs-specific binding peptide, as the receptor. Specifically, adamantine (Ad)-labeled PrP(95-110), denoted as Ad-PrP(95-110), induced the aggregation and color change of AgNPs and the follow-up formation of a network of Ad-PrP(95-110)-AgNPs. Then, Ad-PrP(95-110)-AgNPs were anchored onto a β-cyclodextrin (β-CD)-covered electrode surface through the host-guest interaction between Ad and β-CD, thus producing an amplified electrochemical signal through the solid-state Ag/AgCl reaction by the AgNPs. In the presence of AβOs, Ad-PrP(95-110) interacted specifically with the AβOs, thus losing the capability to bind AgNPs and to induce the formation of an AgNPs-based network on the electrode surface. Consequently, the electrochemical signal decreased with an increase in the concentration of AβOs in the range of 20 pM to 100 nM. The biosensor had a detection limit of 8 pM and showed no response to amyloid-β monomers (AβMs) and fibrils (AβFs). On the basis of the well-defined and amplified electrochemical signal of the AgNPs-based network architecture, these results should be valuable for the design of novel electrochemical biosensors by marrying specific receptors.
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Affiliation(s)
- Ning Xia
- Henan Province of Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University , Anyang, Henan 455000, People's Republic of China
| | - Xin Wang
- Henan Province of Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University , Anyang, Henan 455000, People's Republic of China
| | - Binbin Zhou
- Henan Province of Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University , Anyang, Henan 455000, People's Republic of China
| | - Yangyang Wu
- Henan Province of Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University , Anyang, Henan 455000, People's Republic of China
| | - Wenhui Mao
- Henan Province of Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University , Anyang, Henan 455000, People's Republic of China
| | - Lin Liu
- Henan Province of Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University , Anyang, Henan 455000, People's Republic of China
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43
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Labib M, Sargent EH, Kelley SO. Electrochemical Methods for the Analysis of Clinically Relevant Biomolecules. Chem Rev 2016; 116:9001-90. [DOI: 10.1021/acs.chemrev.6b00220] [Citation(s) in RCA: 555] [Impact Index Per Article: 69.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mahmoud Labib
- Department
of Pharmaceutical Sciences, University of Toronto, Toronto, Ontario M5S 3M2, Canada
| | | | - Shana O. Kelley
- Department
of Pharmaceutical Sciences, University of Toronto, Toronto, Ontario M5S 3M2, Canada
- Institute
of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G4, Canada
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44
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Kaushik A, Jayant RD, Tiwari S, Vashist A, Nair M. Nano-biosensors to detect beta-amyloid for Alzheimer's disease management. Biosens Bioelectron 2016; 80:273-287. [PMID: 26851586 PMCID: PMC4786026 DOI: 10.1016/j.bios.2016.01.065] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 01/21/2016] [Accepted: 01/27/2016] [Indexed: 10/22/2022]
Abstract
Beta-amyloid (β-A) peptides are potential biomarkers to monitor Alzheimer's diseases (AD) for diagnostic purposes. Increased β-A level is neurotoxic and induces oxidative stress in brain resulting in neurodegeneration and causes dementia. As of now, no sensitive and inexpensive method is available for β-A detection under physiological and pathological conditions. Although, available methods such as neuroimaging, enzyme-linked immunosorbent assay (ELISA), and polymerase chain reaction (PCR) detect β-A, but they are not yet extended at point-of-care (POC) due to sophisticated equipments, need of high expertize, complicated operations, and challenge of low detection limit. Recently, β-A antibody based electrochemical immuno-sensing approach has been explored to detect β-A at pM levels within 30-40 min compared to 6-8h of ELISA test. The introduction of nano-enabling electrochemical sensing technology could enable rapid detection of β-A at POC and may facilitate fast personalized health care delivery. This review explores recent advancements in nano-enabling electrochemical β-A sensing technologies towards POC application to AD management. These analytical tools can serve as an analytical tool for AD management program to obtain bio-informatics needed to optimize therapeutics for neurodegenerative diseases diagnosis management.
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Affiliation(s)
- Ajeet Kaushik
- Center for Personalized Nanomedicine, Institute of Neuro immune Pharmacology, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA.
| | - Rahul Dev Jayant
- Center for Personalized Nanomedicine, Institute of Neuro immune Pharmacology, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - Sneham Tiwari
- Center for Personalized Nanomedicine, Institute of Neuro immune Pharmacology, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - Arti Vashist
- Center for Personalized Nanomedicine, Institute of Neuro immune Pharmacology, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - Madhavan Nair
- Center for Personalized Nanomedicine, Institute of Neuro immune Pharmacology, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA.
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Selective amyloid β oligomer assay based on abasic site-containing molecular beacon and enzyme-free amplification. Biosens Bioelectron 2016; 78:206-212. [DOI: 10.1016/j.bios.2015.11.048] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 10/31/2015] [Accepted: 11/15/2015] [Indexed: 12/21/2022]
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Zhou Y, Liu L, Hao Y, Xu M. Detection of Aβ Monomers and Oligomers: Early Diagnosis of Alzheimer's Disease. Chem Asian J 2016; 11:805-17. [DOI: 10.1002/asia.201501355] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 12/27/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Yanli Zhou
- Henan Key Laboratory Cultivation Base of Nanobiological Analytical Chemistry; College of Chemistry and Chemical Engineering; Shangqiu Normal University; Shangqiu 476000 P. R. China
| | - Lantao Liu
- Henan Key Laboratory Cultivation Base of Nanobiological Analytical Chemistry; College of Chemistry and Chemical Engineering; Shangqiu Normal University; Shangqiu 476000 P. R. China
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 P. R. China
| | - Yuanqiang Hao
- Henan Key Laboratory Cultivation Base of Nanobiological Analytical Chemistry; College of Chemistry and Chemical Engineering; Shangqiu Normal University; Shangqiu 476000 P. R. China
| | - Maotian Xu
- Henan Key Laboratory Cultivation Base of Nanobiological Analytical Chemistry; College of Chemistry and Chemical Engineering; Shangqiu Normal University; Shangqiu 476000 P. R. China
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 P. R. China
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Yang T, Yang L, Zhang C, Wang Y, Ma X, Wang K, Luo J, Yao C, Wang X, Wang X. A copper–amyloid-β targeted fluorescent chelator as a potential theranostic agent for Alzheimer's disease. Inorg Chem Front 2016. [DOI: 10.1039/c6qi00268d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fluorescent chelator is able to specifically target and attenuate Cu2+–Aβ aggregates in the brain of mice with Alzheimer's disease, which can be visualized by fluorescence imaging of the chelator.
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Affiliation(s)
- Tao Yang
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Liu Yang
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Changli Zhang
- Department of Chemistry
- Nanjing Xiaozhuang College
- Nanjing
- P. R. China
| | - Yanqing Wang
- Institute of Applied Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng 224002
- P. R. China
| | - Xiang Ma
- State Key Laboratory of Coordination Chemistry
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Kun Wang
- State Key Laboratory of Coordination Chemistry
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Jian Luo
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Cheng Yao
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Xiaoyong Wang
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences; State Key Laboratory of Analytical Chemistry for Life Science
- Nanjing University
- Nanjing
- P. R. China
| | - Xiaohui Wang
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
- State Key Laboratory of Coordination Chemistry
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Yi X, Feng C, Hu S, Li H, Wang J. Surface plasmon resonance biosensors for simultaneous monitoring of amyloid-beta oligomers and fibrils and screening of select modulators. Analyst 2015; 141:331-6. [PMID: 26613550 DOI: 10.1039/c5an01864a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Oligomeric amyloid-beta (Aβ) peptides are considered as the most toxic species in Alzheimer's disease (AD). Monitoring of the Aβ aggregation profiles is critical for elucidating the oligomer toxicity and may serve as a therapeutic target for AD. By immobilizing the capture antibodies of A11 and OC that are specific to the oligomers and fibrils, respectively, in separate fluidic channels, a novel surface plasmon resonance (SPR) biosensor was designed for monitoring the oligomeric and fibrillar species of Aβ(1-42) simultaneously. The influence of curcumin, Cu(2+) and methylene blue on the amount of toxic oligomers and fibrils was evaluated. The half maximal inhibitory concentration (IC50) of curcumin and methylene blue was determined. The formation of Aβ fibrils was also validated by the thioflavin T (ThT) fluorescence assay. The results demonstrate the utility of SPR as an analytical tool for rapid and comprehensive monitoring of Aβ aggregation and screening of Aβ modulators.
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Affiliation(s)
- Xinyao Yi
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, P. R. China 410083.
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Lien TTN, Takamura Y, Tamiya E, Vestergaard MC. Modified screen printed electrode for development of a highly sensitive label-free impedimetric immunosensor to detect amyloid beta peptides. Anal Chim Acta 2015; 892:69-76. [PMID: 26388476 DOI: 10.1016/j.aca.2015.08.036] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 08/10/2015] [Accepted: 08/11/2015] [Indexed: 11/28/2022]
Abstract
Alzheimer's disease (AD) is a fatal neurodegenerative disease affecting approximately 26 million people world-wide, and the number is increasing as life expectancy increases. Since the only reliable diagnosis for the pathology is histochemical post-mortem examination, there is a rather urgent need for reliable, sensitive and quick detection techniques. Amyloid beta, being one of the established and widely accepted biomarkers of AD is a target biomolecule. Herein, we present fabrication of a labelless impedimetric amyloid beta immunosensor on carbon DEP (disposable electrochemical printed) chip. Three types of amyloid β impedimetric immunosensors were fabricated in a systematic step-wise manner in order to understand the effects that each surface modification chemistry had on detection sensitivity. We found that compared to a bare electrode, surface modification through formation of SAM of AuNPs increased sensitivity by approximately three orders of magnitude (LoD from 2.04 μM to 2.65 nM). A further modification using protein G, which helps orientate antibodies to an optimum position for interaction with antigen, lowered the LoD further to 0.57 nM. We have demonstrated that the presence of one of the most abundance proteins in biological fluids, bovine serum albumin (BSA), did not interfere with the sensitivity of the sensor. Since the DEP chips are disposable and the detection platform label-free, the developed sensor is relatively fast and cheap. These methods could easily be applied for detection of other antigens, with selection of the detection platform based on the desired for sensitivity.
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Affiliation(s)
- Truong T N Lien
- School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan; School of Engineering Physics, Hanoi University of Science and Technology (HUST), No.1 Dai Co Viet, Hai Ba Trung, Hanoi, Viet Nam
| | - Yuzuru Takamura
- School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Eiichi Tamiya
- Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Mun'delanji C Vestergaard
- School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan; Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University, Korimoto-1-21-24, Kagoshima City, Kagoshima, 890-0065, Japan.
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