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Ryu JJ, Jang CH. A liquid crystal-based sensor exploiting the aptamer-mediated recognition at the aqueous/liquid crystal interface for sensitive detection of serotonin. Biotechnol Appl Biochem 2023; 70:1972-1982. [PMID: 37479671 DOI: 10.1002/bab.2503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 07/08/2023] [Indexed: 07/23/2023]
Abstract
We report here a liquid crystal (LC)-based sensor for detecting serotonin (5-HT); the proposed sensor uses target-specific aptamer recognition at a cationic surfactant decorated-aqueous/LC interface. Our detection strategy focuses on the orientational transition of LCs upon biological interactions at the interface. In this sensing system, the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) forms a self-assembled monolayer at the aqueous/LC interface and triggers the homeotropic orientation of LCs. After introducing the 5-HT specific aptamer, an electrostatic attraction occurs between the cationic CTAB and anionic aptamer. This interaction destructs the surfactant monolayer at the interface, inducing reorganization of LC alignment from homeotropic to tilted conditions. In the increasing 5-HT levels, specific binding between 5-HT and the aptamer diminishes the interaction between the aptamer and CTAB, thereby maintaining the homeotropic alignment of LCs. The orientational transition of the LCs was observed under a polarized optical microscope. The developed biosensor has a linear detection range from 1 to 1000 nM and a detection limit of 1.68 nM. Moreover, the sensor was applied to a human urine sample and a detection limit of 2.25 nM was obtained. Overall, the designed LC-based sensor is a sensitive, simple, cost effective, and selective platform for detecting 5-HT in aqueous solutions.
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Affiliation(s)
- Je-Jin Ryu
- Department of Chemistry, Gachon University, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Chang-Hyun Jang
- Department of Chemistry, Gachon University, Seongnam-si, Gyeonggi-do, Republic of Korea
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Iqbal T, Elahi A, Wijns W, Shahzad A. Cortisol detection methods for stress monitoring in connected health. HEALTH SCIENCES REVIEW 2023; 6:100079. [DOI: 10.1016/j.hsr.2023.100079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Kim Y, Yang J, Hur H, Oh S, Lee HH. Highly Sensitive Colorimetric Assay of Cortisol Using Cortisol Antibody and Aptamer Sandwich Assay. BIOSENSORS-BASEL 2021; 11:bios11050163. [PMID: 34065214 PMCID: PMC8160784 DOI: 10.3390/bios11050163] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/15/2021] [Accepted: 05/18/2021] [Indexed: 11/16/2022]
Abstract
In this study, cortisol, which is a key stress hormone, could be detected sensitively via the colorimetric assay of a polycarbonate (PC) and glass substrate by the sandwich assay of cortisol monoclonal antibody (c-Mab) and cortisol specific binding aptamer (c-SBA). A highly sensitive change in colorimetry with a limit of detection (LOD) of cortisol of 100 fM could be attained on the optically transparent substrate using the antibody aptamer sandwich (AAS) assay by corresponding stacks of 5 nm gold nanoparticles (Au NPs). The Au NPs were conjugated by the c-SBA and the c-Mab was tethered on the PC and glass substrates. For the AAS method, a simple UV-Vis spectrophotometer was adopted to quantify the cortisol concentrations at an absorbance wavelength of 520 nm. Therefore, this study demonstrates the versatility of the AAS method to measure very low concentrations of cortisol in diagnostic applications.
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Liu X, Hsu SPC, Liu WC, Wang YM, Liu X, Lo CS, Lin YC, Nabilla SC, Li Z, Hong Y, Lin C, Li Y, Zhao G, Chung RJ. Salivary Electrochemical Cortisol Biosensor Based on Tin Disulfide Nanoflakes. NANOSCALE RESEARCH LETTERS 2019; 14:189. [PMID: 31165287 PMCID: PMC6548787 DOI: 10.1186/s11671-019-3012-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 05/13/2019] [Indexed: 05/06/2023]
Abstract
Cortisol, a steroid hormone, is secreted by the hypothalamic-pituitary-adrenal system. It is a well-known biomarker of psychological stress and is hence known as the "stress hormone." If cortisol overexpression is prolonged and repeated, dysfunction in the regulation of cortisol eventually occurs. Therefore, a rapid point-of-care assay to detect cortisol is needed. Salivary cortisol electrochemical analysis is a non-invasive method that is potentially useful in enabling rapid measurement of cortisol levels. In this study, multilayer films containing two-dimensional tin disulfide nanoflakes, cortisol antibody (C-Mab), and bovine serum albumin (BSA) were prepared on glassy carbon electrodes (GCE) as BSA/C-Mab/SnS2/GCE, and characterized using electrochemical impedance spectroscopy and cyclic voltammetry. Electrochemical responses of the biosensor as a function of cortisol concentrations were determined using cyclic voltammetry and differential pulse voltammetry. This cortisol biosensor exhibited a detection range from 100 pM to 100 μM, a detection limit of 100 pM, and a sensitivity of 0.0103 mA/Mcm2 (R2 = 0.9979). Finally, cortisol concentrations in authentic saliva samples obtained using the developed electrochemical system correlated well with results obtained using enzyme-linked immunosorbent assays. This biosensor was successfully prepared and used for the electrochemical detection of salivary cortisol over physiological ranges, based on the specificity of antibody-antigen interactions.
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Affiliation(s)
- Xinke Liu
- College of Materials Science and Engineering, Shenzhen University, No. 3688, Nanhai Ave, Shenzhen, 518060 China
| | - Sanford P. C. Hsu
- Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, 11217 Taiwan
- School of Medicine, National Yang Ming University, Taipei, 11221 Taiwan
| | - Wai-Ching Liu
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Sec. 3, Zhongxiao E. Rd, Taipei, 10608 Taiwan
| | - Yi-Min Wang
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Sec. 3, Zhongxiao E. Rd, Taipei, 10608 Taiwan
| | - Xinrui Liu
- Department of Neurosurgical Oncology, First Hospital, Jilin University, Changchun, 130021 China
| | - Ching-Shu Lo
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Sec. 3, Zhongxiao E. Rd, Taipei, 10608 Taiwan
| | - Yu-Chien Lin
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Sec. 3, Zhongxiao E. Rd, Taipei, 10608 Taiwan
| | - Sasza Chyntara Nabilla
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Sec. 3, Zhongxiao E. Rd, Taipei, 10608 Taiwan
| | - Zhiwen Li
- College of Materials Science and Engineering, Shenzhen University, No. 3688, Nanhai Ave, Shenzhen, 518060 China
| | - Yuehua Hong
- College of Materials Science and Engineering, Shenzhen University, No. 3688, Nanhai Ave, Shenzhen, 518060 China
| | - Chingpo Lin
- Department of Neurosurgical Oncology, First Hospital, Jilin University, Changchun, 130021 China
| | - Yunqian Li
- Department of Neurosurgical Oncology, First Hospital, Jilin University, Changchun, 130021 China
| | - Gang Zhao
- Department of Neurosurgical Oncology, First Hospital, Jilin University, Changchun, 130021 China
| | - Ren-Jei Chung
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Sec. 3, Zhongxiao E. Rd, Taipei, 10608 Taiwan
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Jung H, Jung J, Kim YH, Kwon D, Kim BG, Na HB, Lee HH. Surface Plasmon Resonance Characteristics of Au Nanoparticles Layered Sensor Chip for Direct Detection of Stress Hormone Conjugated by Nanoparticles. BIOCHIP JOURNAL 2018. [DOI: 10.1007/s13206-018-2310-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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