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Wang X, Wang H, Sun Y, Liu Z, Wang N. Liquid crystal biosensor based on AuNPs signal amplification for detection of human chorionic gonadotropin. Talanta 2024; 266:125025. [PMID: 37586282 DOI: 10.1016/j.talanta.2023.125025] [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: 02/26/2023] [Revised: 07/27/2023] [Accepted: 08/01/2023] [Indexed: 08/18/2023]
Abstract
The detection of human chorionic gonadotropin (HCG) allows for the determination of pregnancy and is thus crucial during early pregnancy testing. This study introduces a novel liquid crystal (LC) biosensor that employs Au nanoparticles (AuNPs) for signal amplification, thus enabling the detection of the HCG antigen in a micro, efficient, and cost-effective manner. The sensor design capitalizes on the unique properties of LC to facilitate the detection of HCG. In this research, the surface of the base substrate was first modified with material from DMOAP and APTES, and EDC/sulfo-NHS was used to couple AuNPs and β-hCG to form an AuNP-β-hCG conjugate that improves the coupling rate. The carboxyl group of the antibody was reacted with the aldehyde group of glutaraldehyde, which helps to fix the β-hCG antibody to the surface of the substrate. The HCG sample is immobilized on the surface of the substrate via antigen-antibody immunobinding. As signal amplifiers, the AuNPs can have a significant effect on the topology of the interface and the vertical order of the LC molecules, thus reducing the limit of detection. Finally, the limit of detection was calculated using the SPSS system, and the relationship between grey values and concentrations was also obtained. The detection limit for HCG can be as low as 1.916 × 10-3 mIU·mL-1 under ideal conditions. Compared to other detection methods for HCG, this structure provides a detection pathway with excellent sensitivity, low detection limits, and better specificity, thus offering a new idea for HCG or any other target requiring trace detection.
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Affiliation(s)
- Xue Wang
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710075, China; Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710021, China; The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi, 710075, China; Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi, 710075, China; Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi, 710075, China.
| | - Huanyuan Wang
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710075, China; Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710021, China; The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi, 710075, China; Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi, 710075, China; Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi, 710075, China.
| | - Yingying Sun
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710075, China; Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710021, China; The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi, 710075, China; Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi, 710075, China; Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi, 710075, China
| | - Zhe Liu
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710075, China; Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710021, China; The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi, 710075, China; Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi, 710075, China; Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi, 710075, China
| | - Na Wang
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710075, China; Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi, 710021, China; The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi, 710075, China; Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi, 710075, China; Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi, 710075, China
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Wang X, Sun Y, Liu Z, Chen W, Meng T, Wang H. Construction of a liquid crystal biosensor based on Fe 3O 4 nano-signal amplification and its application in HCG detection. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:4563-4571. [PMID: 37646122 DOI: 10.1039/d3ay01075a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
In this research, to improve the ability of nanomaterials to interfere with liquid crystal orientation, we constructed a novel liquid crystal biosensor using Fe3O4 nanospheres as signal amplifiers, which was used for the highly selective and sensitive detection of human chorionic gonadotropin (HCG). The Fe3O4 nanospheres in liquid crystal biosensors are still rare, in particular for the detection of the HCG antigen, a marker of pregnancy in women. This strategy takes advantage of the large spatial structure of Fe3O4 nanospheres to pre-immobilise β-hCG antibodies on the glass substrate, and, in the presence of HCG antigens, the antigen-antibody formed a specific immune response to disrupt the orientation of the liquid crystal. This allows an amplified optical signal to be generated for the ultimate successful detection of HCG antigen, and can greatly reduce the detectability of the target antigen concentration, ultimately greatly increasing the sensitivity of detection to a large degree. Thus, under optimal detection conditions, the minimum detection limit can be as low as 0.438 mIU mL-1. The prepared LC biosensor demonstrates excellent specificity and sensitivity compared to conventional nanomaterials used in liquid crystal biosensors, and will be of great benefit for future applications requiring trace detection of proteins, antibiotics, bacteria and so on, which is expected to provide a sensitive detection platform for HCG and other molecular monitors.
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Affiliation(s)
- Xue Wang
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710075, China.
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710021, China
- The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi 710075, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi 710075, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi 710075, China
| | - Yingying Sun
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710075, China.
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710021, China
- The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi 710075, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi 710075, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi 710075, China
| | - Zhe Liu
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710075, China.
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710021, China
- The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi 710075, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi 710075, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi 710075, China
| | - Weiwei Chen
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710075, China.
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710021, China
- The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi 710075, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi 710075, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi 710075, China
| | - Tingting Meng
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710075, China.
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710021, China
- The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi 710075, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi 710075, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi 710075, China
| | - Huanyuan Wang
- Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710075, China.
- Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710021, China
- The Key Laboratory of Degeneration and Unutilized Land Improvement of the Ministry of Land and Resources, Xi'an, Shaanxi 710075, China
- Shaanxi Engineering Research Center of Land Consolidation, Xi'an, Shaanxi 710075, China
- Land Engineering Technology Innovation Center, Ministry of Natural Resources, Xi'an, Shaanxi 710075, China
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Tang R, Xie M, Yan X, Qian L, Giesy JP, Xie Y. A nitrocellulose/cotton fiber hybrid composite membrane for paper-based biosensor. CELLULOSE (LONDON, ENGLAND) 2023; 30:1-13. [PMID: 37360890 PMCID: PMC10238769 DOI: 10.1007/s10570-023-05288-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 05/24/2023] [Indexed: 06/28/2023]
Abstract
Nitrocellulose (NC) membrane was fabricated and tested for its potential use in various paper-based biosensors for use in point-of-care testing. However, contemporary technologies are complex, expensive, non-scalable, limited by conditions, and beset with potentially adverse effects on the environment. Herein, we proposed a simple, cost-effective, scalable technology to prepare nitrocellulose/cotton fiber (NC/CF) composite membranes. The NC/CF composite membranes with a diameter of 20 cm were fabricated in 15 min using papermaking technology, which contributes to scalability in the large-scale production of these composites. Compared with existing commercial NC membranes, the NC/CF composite membrane is characterized by small pore size (3.59 ± 0.19 μm), low flow rate (156 ± 55 s/40 mm), high dry strength (up to 4.04 MPa), and wet strength (up to 0.13 MPa), adjustable hydrophilic-hydrophobic (contact angles ranged from 29 ± 4.6 to 82.8 ± 2.4°), the good adsorption capacity of protein (up to 91.92 ± 0.07 μg). After lateral flow assays (LFAs) detection, the limit of detection is 1 nM, which is similar to commercial NC membrane (Sartorius CN 140). We envision the NC/CF composite membrane as a promising material for paper-based biosensors of point-of-care testing applications.
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Affiliation(s)
- Ruihua Tang
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an, 710021 People’s Republic of China
- National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, 710021 People’s Republic of China
| | - Mingyue Xie
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an, 710021 People’s Republic of China
- National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, 710021 People’s Republic of China
| | - Xueyan Yan
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an, 710021 People’s Republic of China
- National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, 710021 People’s Republic of China
| | - Liwei Qian
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an, 710021 People’s Republic of China
- National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, 710021 People’s Republic of China
| | - John P. Giesy
- Toxicology Center, University of Saskatchewan, 44 Campus Dr, Saskatoon, S7N 5B3 Saskatchewan Canada
- Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, SK S7N 5B4 Canada
- Department of Integrative Biology and Center for Integrative Toxicology, Michigan State University, East Lansing, MI 48824 USA
- Department of Environmental Science, Baylor University, One Bear Place #97266, Waco, TX 76798-7266 USA
| | - Yuwei Xie
- Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences, Nanjing, 210042 China
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Pavlova E, Maslakova A, Prusakov K, Bagrov D. Optical sensors based on electrospun membranes – principles, applications, and prospects for chemistry and biology. NEW J CHEM 2022. [DOI: 10.1039/d2nj01821g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrospun membranes are promising substrates for receptor layer immobilization in optical sensors. Either colorimetric, luminescence, or Raman scattering signal can be used to detect the analyte.
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Affiliation(s)
- Elizaveta Pavlova
- Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1-12, 119234, Moscow, Russian Federation
- Federal Research Clinical Center of Physical–Chemical Medicine of the Federal Medical and Biological Agency of Russia, 1a Malaya Pirogovskaya Street, 119435, Moscow, Russian Federation
| | - Aitsana Maslakova
- Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1-12, 119234, Moscow, Russian Federation
| | - Kirill Prusakov
- Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1-12, 119234, Moscow, Russian Federation
- Federal Research Clinical Center of Physical–Chemical Medicine of the Federal Medical and Biological Agency of Russia, 1a Malaya Pirogovskaya Street, 119435, Moscow, Russian Federation
| | - Dmitry Bagrov
- Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1-12, 119234, Moscow, Russian Federation
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Shirshahi V, Liu G. Enhancing the analytical performance of paper lateral flow assays: From chemistry to engineering. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116200] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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