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Zhang X, Wang F, Chen Z. Electrochemical chiral sensor for recognition of amino acid enantiomers with cyclodextrin-based microporous organic networks. Anal Chim Acta 2024; 1316:342879. [PMID: 38969416 DOI: 10.1016/j.aca.2024.342879] [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: 04/11/2024] [Revised: 05/16/2024] [Accepted: 06/14/2024] [Indexed: 07/07/2024]
Abstract
BACKGROUND Chirality is a ubiquitous phenomenon in nature, but enantiomers exhibit different pharmacological activities and toxicological effects. Therefore, Chiral recognition plays a pivotal role in various fields such as life sciences, chemical synthesis, drug development, and materials science. The synthesis of novel chiral composites with well-defined loading capabilities and ordered structures holds significant potential for electrochemical chiral recognition applications. However, the design of selective and stable electrochemical chiral recognition materials remains a challenging task. RESULT In this work, we construct a simple and rapid electrochemical sensing platform for tryptophan (Trp) enantiomer recognition using cyclodextrin-modified microporous organic network as chiral recognition agent. CD-MON with chiral microenvironment was prepared by Sonogashira-Hagihara coupling reaction of the chiral molecule heptyl-6-iodo-6-deoxyβ-cyclodextrin and 1, 4-Diethynylbenzene. The adhesion of BSA makes CD-MON firmly fixed on the electrode surface, and as a chiral protein, it can improve the chiral recognition ability through synergistic effect. Chiral amino acids are in full contact with the chiral microenvironment during pore conduction of MON, and L-Trp is more stably bound to CD-MON/BSA due to steric hindrance, host-guest recognition and hydrogen bonding. Therefore, the electrochemical sensor can effectively identify tryptophan enantiomers (IL-Trp/ID-Trp = 2.02), and it exhibits a detection limit of 2.6 μM for L-Trp. UV-Vis spectroscopy confirmed the adsorption capacity of CD-MON towards tryptophan enantiomers in agreement with electrochemistry results. SIGNIFICANCE The prepared chiral sensor has excellent stability, reproducibility (RSD = 3.7%) and selectivity, realizes the quantitative detection of single isomer in tryptophan racemic and quantitative analysis in real samples with 94.0%-101.0% recovery. This work represents the first application of MON in chiral electrochemistry which expands the application scope of chiral sensors and holds great significance in separation science and electrochemical sensing.
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Affiliation(s)
- Xuan Zhang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University and Wuhan University, School of Pharmaceutical Sciences, Wuhan, 430071, China; Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, Wuhan, 430071, China
| | - Fang Wang
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University and Wuhan University, School of Pharmaceutical Sciences, Wuhan, 430071, China; Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, Wuhan, 430071, China
| | - Zilin Chen
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University and Wuhan University, School of Pharmaceutical Sciences, Wuhan, 430071, China; Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, Wuhan, 430071, China.
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2
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Hao C. Recent Progress in Detecting Enantiomers in Food. Molecules 2024; 29:1106. [PMID: 38474618 DOI: 10.3390/molecules29051106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/25/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024] Open
Abstract
The analysis of enantiomers in food has significant implications for food safety and human health. Conventional analytical methods employed for enantiomer analysis, such as gas chromatography and high-performance liquid chromatography, are characterized by their labor-intensive nature and lengthy analysis times. This review focuses on the development of rapid and reliable biosensors for the analysis of enantiomers in food. Electrochemical and optical biosensors are highlighted, along with their fabrication methods and materials. The determination of enantiomers in food can authenticate products and ensure their safety. Amino acids and chiral pesticides are specifically discussed as important chiral substances found in food. The use of sensors replaces expensive reagents, offers real-time analysis capabilities, and provides a low-cost screening method for enantiomers. This review contributes to the advancement of sensor-based methods in the field of food analysis and promotes food authenticity and safety.
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Affiliation(s)
- Changlong Hao
- School of Food Science and Technology, State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China
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3
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Li H, Han S, Niu X, Wang K. Revelation of the Electrochemical Chiral Recognition of l-Proline-Tuned Zr-MOFs. ACS APPLIED MATERIALS & INTERFACES 2023; 15:44127-44136. [PMID: 37731221 DOI: 10.1021/acsami.3c10543] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Chirality plays an extremely important role in nature. In this work, a highly ordered and non-clustered crystalline material UiO-88-LP was synthesized by using l-proline (l-Pro)-tuning Zr-MOF and the solvothermal method, which was then modified on the glassy carbon electrode (GCE) to construct an electrochemical chiral interface for the recognition of tryptophan (Trp) configuration. UiO-88-LP composites were characterized by scanning electron microscopy, X-ray transmission diffraction, X-ray photoelectron spectroscopy, and Fourier transform infrared (FT-IR) spectroscopy. After optimization of the experimental conditions, redox peaks for l-Trp and d-Trp were clearly observed at the UiO-88-LP/GCE electrochemical sensing interface with a peak-to-current ratio (IL/ID) of 2.47. The peak current was positively correlated with the concentration of Trp. The electrochemical recognition behavior of l-Trp and d-Trp was investigated by differential pulse voltammetry. The electrochemical characterization showed that UiO-88-LP/GCE had an enantiomeric resolution of amino acids. The recognition mechanism showed that l-Pro entering the UiO-66 molecular cage provided a site for the system to be recognized, so the purpose of recognition was achieved. The relevant data provide theoretical support for the practical application of UiO-88-LP in electrochemical sensors.
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Affiliation(s)
- Hongxia Li
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, PR China
| | - Sha Han
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, PR China
| | - Xiaohui Niu
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, PR China
| | - Kunjie Wang
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, PR China
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4
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Pan QX, Yang YC, Zhao NN, Zhang B, Cui L, Zhang CY. Development of a chiral electrochemical sensor based on copper-amino acid mercaptide nanorods for enantioselective discrimination of tryptophan enantiomers. Anal Chim Acta 2023; 1272:341480. [PMID: 37355327 DOI: 10.1016/j.aca.2023.341480] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/02/2023] [Accepted: 06/03/2023] [Indexed: 06/26/2023]
Abstract
Chirality is an important property of nature and it regulates fundamental phenomena in nature and organisms. Here, we develop a chiral electrochemical sensor based on copper-amino acid mercaptide nanorods (L-CuCys NRs) to discriminate tryptophan (Trp) isomers. The chiral L-CuCys NRs are prepared in alkaline solution based on the facile coordination reaction between the sulfhydryl groups of L-Cys and copper ions. Since the stability constant (K) of L-CuCys NRs with L-Trp (752) are much higher than that of L-CuCys NRs with D-Trp (242), the cross-linking bonds between L-CuCys NRs and L-Trp are more stable than those between L-CuCys NRs and D-Trp. Consequently, this electrochemical sensor can selectively recognize the Trp isomers with an enantiomeric electrochemical difference ratio (IL-Trp/ID-Trp) of 3.22, and it exhibits a detection limit of 0.26 μM for L-Trp. Moreover, this electrochemical sensor can quantitatively measure Trp isomers in complex samples. Importantly, this electrochemical sensor has the characteristics of high stability, good repeatability, easy fabrication, low cost, and efficient discrimination of tryptophan (Trp) isomers.
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Affiliation(s)
- Qian-Xiu Pan
- College of Pharmacy, Department of Pathology, Weifang Medical University, Weifang, 261053, China
| | - Yun-Cong Yang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, China
| | - Ning-Ning Zhao
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, China
| | - Baogang Zhang
- College of Pharmacy, Department of Pathology, Weifang Medical University, Weifang, 261053, China.
| | - Lin Cui
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, China.
| | - Chun-Yang Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
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5
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Niu X, Zhao R, Yan S, Pang Z, Li H, Yang X, Wang K. Chiral Materials: Progress, Applications, and Prospects. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2303059. [PMID: 37217989 DOI: 10.1002/smll.202303059] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/10/2023] [Indexed: 05/24/2023]
Abstract
Chirality is a universal phenomenon in molecular and biological systems, denoting an asymmetric configurational property where an object cannot be superimposed onto its mirror image by any kind of translation or rotation, which is ubiquitous on the scale from neutrinos to spiral galaxies. Chirality plays a very important role in the life system. Many biological molecules in the life body show chirality, such as the "codebook" of the earth's biological diversity-DNA, nucleic acid, etc. Intriguingly, living organisms hierarchically consist of homochiral building blocks, for example, l-amino acids and d-sugars with unknown reason. When molecules with chirality interact with these chiral factors, only one conformation favors the positive development of life, that is, the chiral host environment can only selectively interact with chiral molecules of one of the conformations. The differences in chiral interactions are often manifested by chiral recognition, mutual matching, and interactions with chiral molecules, which means that the stereoselectivity of chiral molecules can produce changes in pharmacodynamics and pathology. Here, the latest investigations are summarized including the construction and applications of chiral materials based on natural small molecules as chiral source, natural biomacromolecules as chiral sources, and the material synthesized by design as a chiral source.
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Affiliation(s)
- Xiaohui Niu
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Rui Zhao
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Simeng Yan
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Zengwei Pang
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Hongxia Li
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Xing Yang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Kunjie Wang
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
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Li YJ, Yang LL, Ni L, Xiong JM, He JY, Zhou LD, Luo L, Zhang QH, Yuan CS. Constructing electrochemical sensor using molecular-imprinted polysaccharide for rapid identification and determination of l-tryptophan in diet. Food Chem 2023; 425:136486. [PMID: 37267785 DOI: 10.1016/j.foodchem.2023.136486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 04/27/2023] [Accepted: 05/27/2023] [Indexed: 06/04/2023]
Abstract
An imbalance of l-tryptophan (l-Trp), a basic component of a healthy diet, is harmful to human health. Traditional methods for detecting l-Trp have many limitations. To correct a deficiency or excess of l-Trp in human diets, it is necessary to develop a novel method that is rapid, low-cost, and high-sensitivity. Herein, a molecularly imprinted polysaccharide electrochemical sensor termed MIP/CS/MWCNTs/GCE (molecularly imprinted polymer/chitosan/multiwalled carbon nanotubes/glassy carbon electrode) targeting l-Trp was first constructed on a glassy carbon electrode, which was modified with multiwalled carbon nanotubes and chitosan using bifunctional monomers. The MIP/CS/MWCNTs/GCE obtained a wide linear range (1-300 μM) for detecting l-Trp and accurately detected the proportion of l-Trp in mixtures of Trp enantiomers. In milk samples, the spiked recoveries of l-Trp were 86.50 to 99.65%. The MIP/CS/MWCNTs/GCE electrochemical sensor possessed good recognition and detection performance for l-Trp and has promising potential for practical application.
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Affiliation(s)
- Yan-Jun Li
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Li-Li Yang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Li Ni
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Jia-Min Xiong
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Jia-Yuan He
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Lian-Di Zhou
- Basic Medical College, Chongqing Medical University, Chongqing 400016, China.
| | - Ling Luo
- Chongqing Cancer Institute, Chongqing University Cancer Hospital, Hanyu Road 181, Chongqing 400030, China.
| | - Qi-Hui Zhang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China; Tang Center for Herbal Medicine Research and Department of Anesthesia & Critical Care, University of Chicago, Chicago, IL 60637, USA.
| | - Chun-Su Yuan
- Tang Center for Herbal Medicine Research and Department of Anesthesia & Critical Care, University of Chicago, Chicago, IL 60637, USA
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7
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Niu X, Zhao R, Yan S, Li H, Yang J, Cao K, Liu X, Wang K. Chiral MOFs encapsulated by polymers with poly-metallic coordination as chiral biosensors. Mikrochim Acta 2023; 190:230. [PMID: 37208529 DOI: 10.1007/s00604-023-05807-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 04/17/2023] [Indexed: 05/21/2023]
Abstract
Chiral materials have drawn the widespread attention for their its chiral recognition ability. The design and synthesis of chiral material are of importance owing to the unpredictability in controlling chirality during the synthesis process. To circumvent problems, a chiral MOF (D-His-ZIF-8) was synthesized by ligand exchange of 2-methylimidazole (Hmim) on ZIF-8 by D-histidine (D-His), which can be treated as chiral host to distinguish amino acid enantiomers. The obtained D-His-ZIF-8 can provide chiral nanochannels for amino acid guests. Meanwhile, polynary transition-metal ion (Co2+ and Fe3+) coordinating with polydopamine (PDA) wrapped on the surface of D-His-ZIF-8 can increase the active sites. The electrochemical chiral recognition behavior showed that D-His-ZIF-8@CoFe-PDA exhibited good recognition of the tryptophan enantiomer (L/D-Trp) (working potential of -0.2 V vs. Hg/HgCl2). The LOD and LOQ of L-Trp were 0.066 mM and 0.22 mM, respectively, while the LOD and LOQ of D-Trp were 0.15 mM and 0.50 mM, respectively. Finally, the usefulness of D-His-ZIF-8@CoFe-PDA/GCE was evaluated with a recovery of 94.4-103%. The analysis of real samples shows that D-His-ZIF-8@CoFe-PDA/GCE is a feasible sensing platform for the detection of L-Trp and D-Trp.
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Affiliation(s)
- Xiaohui Niu
- College of Petrochemical Technology, Lanzhou University of Technology, 730050, Lanzhou, People's Republic of China.
| | - Rui Zhao
- College of Petrochemical Technology, Lanzhou University of Technology, 730050, Lanzhou, People's Republic of China
| | - Simeng Yan
- College of Petrochemical Technology, Lanzhou University of Technology, 730050, Lanzhou, People's Republic of China
| | - Hongxia Li
- College of Petrochemical Technology, Lanzhou University of Technology, 730050, Lanzhou, People's Republic of China
| | - Jing Yang
- Gansu Guoxin Runda Analysis and Testing Center, 730010, Lanzhou, People's Republic of China
| | - Kunjie Cao
- College of Petrochemical Technology, Lanzhou University of Technology, 730050, Lanzhou, People's Republic of China
| | - Xiaoyu Liu
- College of Petrochemical Technology, Lanzhou University of Technology, 730050, Lanzhou, People's Republic of China
| | - Kunjie Wang
- College of Petrochemical Technology, Lanzhou University of Technology, 730050, Lanzhou, People's Republic of China.
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8
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Development of a Nafion-MWCNTs and in-situ generated Au nanopopcorns dual-amplification electrochemical aptasensor for ultrasensitive detection of OTA. Food Chem 2023; 403:134375. [DOI: 10.1016/j.foodchem.2022.134375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 09/10/2022] [Accepted: 09/19/2022] [Indexed: 11/23/2022]
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9
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Han S, Wang L, Li H, Niu X, Li Y, Liu X, Wang K. Chiral electrochemical recognition of tryptophan enantiomers by polysaccharide modified MOFs. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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10
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Wen T, Li J, Cai W, Yang B, Kong Y, Yin ZZ. A chiral sensing platform based on a multi-substituted ferrocene-cuprous ion complex for the discrimination of electroactive amino acid isomers. Analyst 2023; 148:919-925. [PMID: 36692114 DOI: 10.1039/d2an01887j] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
An electrochemical chiral sensing platform based on a multi-substituted ferrocene-cuprous ion (Cu+) complex is constructed for the discrimination of electroactive amino acid (AA) isomers. Due to the opposite configurations of the AA isomers, the developed multi-substituted ferrocene-Cu+ can preferably combine with a right-handed AA (D-AA) isomer to form the ternary complex of multi-substituted ferrocene-Cu+-D-AA through π-π interactions, resulting in higher peak currents of D-AA. Therefore, the isomers of electroactive AA can be successfully discriminated. Among the tested electroactive AA isomers, the chiral sensing platform exhibits higher discrimination capability toward the isomers of tryptophan (Trp) than that of tyrosine (Tyr) and cysteine (Cys), which might be ascribed to the stronger π-π interactions between the benzene ring of the multi-substituted ferrocene and the indole ring of the Trp isomers.
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Affiliation(s)
- Tai Wen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
| | - Junyao Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
| | - Wenrong Cai
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
| | - Baozhu Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
| | - Yong Kong
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
| | - Zheng-Zhi Yin
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, P. R. China.
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Yao W, Li S, Xie L, Jiang Y. Chiral recognition of tryptophan enantiomer based on the electrode modified by polyaniline adsorption bovine serum albumin complex. Chirality 2023; 35:129-144. [PMID: 36564104 DOI: 10.1002/chir.23525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/11/2022] [Accepted: 12/14/2022] [Indexed: 12/25/2022]
Abstract
A chiral sensing platform was constructed via adsorptive functionalization of ammonium persulfate doped polyaniline (APS-DPANI) with bovine serum albumin (BSA). The novelty of this work is the construction of such chiral interface with adsorption principle. The material has been characterized by scanning electron microscope, Fourier transform infrared and X-ray photoelectron spectroscopy, and thermogravimetric and water contact angle analyses. It displayed considerable stability in multi-run cyclic voltammetric scanning. Moreover, the superior conductivity of APS-DPANI and the decent binding ability of BSA endowed this sensing platform with an excellent recognition effect for tryptophan (Trp) enantiomers in the differential pulse voltammetry (DPV) test. The recognition was highly reproducible, and the detection limits for L- and D-isomer were 0.071 and 0.0478 mM, respectively.
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Affiliation(s)
- Wenyan Yao
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, China
| | - Sha Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, China
| | - Licheng Xie
- Changzhou University Huaide College, Taizhou, China
| | - Yan Jiang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, China
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12
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Liu Z, Yin ZZ, Zheng G, Zhang H, Zhou M, Li S, Kong Y. Dual-template molecularly imprinted electrochemical biosensor for IgG-IgM combined assay based on a dual-signal strategy. Bioelectrochemistry 2022; 148:108267. [PMID: 36148758 DOI: 10.1016/j.bioelechem.2022.108267] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/07/2022] [Accepted: 09/12/2022] [Indexed: 01/06/2023]
Abstract
Detection of immunoglobulins (Igs) is of clinical significance for early diagnosis and timely treatment of diseases. Herein, a dual-template molecularly imprinted (DTMI) electrochemical biosensor was developed for IgG-IgM combined assay. In this DTMI electrochemical biosensor, Prussian blue (PB) and thionine (TH) decorated on graphene oxide (GO) and multi-walled carbon nanotubes (MWCNTs), respectively, were utilized as the dual-signal probes, and Au nanoparticles (AuNPs) were used for Igs anchoring and signal amplification. Polypyrrole (PPy) was electrodeposited on the biosensor surface and acted as the molecularly imprinted polymers (MIPs). After the removal of the IgG and IgM templates, the resultant DTMI electrochemical biosensor was used for IgG-IgM combined assay, and the concentrations of IgG and IgM could be indicated by the changes in the peak currents of PB (ΔIPB) and TH (ΔITH), respectively. The DTMI electrochemical biosensor displayed a wide linear range and a low limit of detection (LOD) for both IgG (28.80 pg mL-1) and IgM (0.58 pg mL-1). Finally, the developed DTMI biosensor was used for IgG-IgM combined assay in clinical serum samples, and the results were comparable to those obtained by conventional immunoturbidimetry, implying its great potential in clinical diagnosis.
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Affiliation(s)
- Zixuan Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Zheng-Zhi Yin
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Guojun Zheng
- Department of Clinical Laboratory, Changzhou No.3 People's Hospital, Changzhou 213001, China
| | - Hongyu Zhang
- Department of Clinical Laboratory, Changzhou No.3 People's Hospital, Changzhou 213001, China
| | - Min Zhou
- Department of Clinical Laboratory, Changzhou No.3 People's Hospital, Changzhou 213001, China
| | - Shan Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China; Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yong Kong
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
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Ratiometric Fluorescence Detection of Colorectal Cancer-Associated Exosomal miR-92a-3p with DSN-Assisted Signal Amplification by a MWCNTs@Au NCs Nanoplatform. BIOSENSORS 2022; 12:bios12070533. [PMID: 35884336 PMCID: PMC9312788 DOI: 10.3390/bios12070533] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/14/2022] [Accepted: 07/15/2022] [Indexed: 12/18/2022]
Abstract
The detection of miRNA shows great promise in disease diagnosis. In this work, a ratiometric fluorescent biosensor based on multi-walled carbon nanotubes@gold nanoclusters (MWCNTs@Au NCs) and duplex-specific nuclease (DSN)-assisted signal amplification was fabricated for miRNA detection. Colorectal cancer (CRC)-associated miR-92a-3p extracted from exosomes was selected as the target. MWCNTs@Au NCs performs the dual functions of fluorescence quencher and internal fluorescence reference. In the absence of miR-92a-3p, an Atto-425-modified single-stranded DNA probe is adsorbed on MWCNTs@Au NCs, resulting in the quenching of Atto-425. In the presence of miR-92a-3p, the duplex is formed by hybridization of the probe and miR-92a-3p and leaves the MWCNTs@Au NCs, resulting in the fluorescence recovery of Atto-425. DSN can cleave the probe and result in the release of miR-92a-3p. The released miR-92a-3p can hybridize with other probes to form a signal amplification cycle. The fluorescence of MWCNTs@Au NCs remains stable and constitutes a ratiometric fluorescence system with that of Atto-425. A detection concentration interval of 0.1–10 pM and a limit of detection of 31 fM was obtained under optimized measurement conditions. In addition, the accuracy of the biosensor was validated by detecting the concentration of miR-92a-3p extracted from clinical exosome samples.
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