1
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Zhang D, Luo T, Cai X, Zhao NN, Zhang CY. Recent advances in nucleic acid signal amplification-based aptasensors for sensing mycotoxins. Chem Commun (Camb) 2024; 60:4745-4764. [PMID: 38647208 DOI: 10.1039/d4cc00982g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Mycotoxin contamination in food products may cause serious health hazards and economic losses. The effective control and accurate detection of mycotoxins have become a global concern. Even though a variety of methods have been developed for mycotoxin detection, most conventional methods suffer from complicated operation procedures, low sensitivity, high cost, and long assay time. Therefore, the development of simple and sensitive methods for mycotoxin assay is highly needed. The introduction of nucleic acid signal amplification technology (NASAT) into aptasensors significantly improves the sensitivity and facilitates the detection of mycotoxins. Herein, we give a comprehensive review of the recent advances in NASAT-based aptasensors for assaying mycotoxins and summarize the principles, features, and applications of NASAT-based aptasensors. Moreover, we highlight the challenges and prospects in the field, including the simultaneous detection of multiple mycotoxins and the development of portable devices for field detection.
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Affiliation(s)
- Dandan Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
| | - Ting Luo
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
| | - Xiangyue Cai
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
| | - Ning-Ning Zhao
- 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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2
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Yu H, Zhao Q. Profiling Additional Effects of Aptamer Fluorophore Modification on Microscale Thermophoresis Characterization of Aptamer-Target Binding. Anal Chem 2023; 95:17011-17019. [PMID: 37946406 DOI: 10.1021/acs.analchem.3c03603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Aptamers are promising affinity ligands with considerable applications, such as biosensors, disease diagnosis, therapy, etc. Characterization of aptamer-target binding is important in aptamer selection and aptamer applications. Microscale thermophoresis (MST) is an emerging optical technique for molecular interactions, which monitors fluorescence responses of fluorescent molecules in a microscopic temperature gradient. Harnessing merits in trace sample consumption, high speed, free separation, free immobilization, and ratiometric analysis, MST draws intense wide attention. MST is often applied for aptamer-target binding studies using fluorescently labeled aptamers. However, the MST signal is strongly dependent on fluorophore modifications at aptamers, which brings additional challenges and effects for MST analyzing aptamer affinity. Here, we systematically explored effects of fluorophore modifications (e.g., fluorophore types, fluorophore positions, etc.) of aptamer probes on MST characterizing aptamer-target interactions and identified gaps of MST analysis in aptamer affinity determination, taking aptamers against cadmium ions and aflatoxin B1 as two representatives. The same aptamers with different fluorophore modifications showed distinct MST signals in response magnitudes and signs as well as determined affinities, and some of them failed to respond to target binding and gave false affinity information in MST. A competitive MST method can be used to extract the affinity of unmodified aptamers, excluding effects of fluorophore modification. This work highlights that appropriate fluorophore modification is crucial in MST analysis of aptamer affinity, and caution is needed in MST applications, providing a basis for rational design of the MST method for the reliable molecular interaction study.
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Affiliation(s)
- Hao Yu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
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3
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Du H, Li X, Xu S, Cheng G, Xue Q, Xu H. N/S-Co-doped carbon dot-based FRET ratiometric fluorescence aptasensing platform modulated with entropy-driven DNA amplifier for ochratoxin A detection. Anal Bioanal Chem 2023:10.1007/s00216-023-04778-5. [PMID: 37306781 DOI: 10.1007/s00216-023-04778-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/03/2023] [Accepted: 05/05/2023] [Indexed: 06/13/2023]
Abstract
This study proposes a nitrogen and sulfur co-doped carbon dot (N/S-CD)-based FRET ratiometric fluorescence aptasensing strategy modulated with entropy-driven DNA amplifier for sensitive and accurate detection of ochratoxin A (OTA). In the strategy, a duplex DNA probe containing OTA aptamer and complementary DNA (cDNA) is designed as a recognition and transformation element. Upon sensing of target OTA, the cDNA was liberated, and triggered a three-chain DNA composite-based entropy-driven DNA circuit amplification, making CuO probes anchor on a magnetic bead (MB). The CuO-encoded MB complex probe is finally turned into abundant Cu2+, which oxidizes o-phenylenediamine (oPD) to generate 2,3-diaminophenazine (DAP) with yellow fluorescence and further triggers FRET between the blue fluorescent N/S-CDs and DAP. The changes in ratiometric fluorescence are related to the OTA concentration. Originating from the synergistic amplifications from the entropy-driven DNA circuits and Cu2+ amplification, the strategy dramatically enhanced detection performance. A limit of detection as low as 0.006 pg/mL of OTA was achieved. Significantly, the aptasensor can visually evaluate the OTA via on-site visual screening. Moreover, the high-confidence quantification of the OTA in real samples with results consistent with that of the LC-MS method indicated that the proposed strategy has practical application prospects for sensitive and accurate quantification in food safety.
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Affiliation(s)
- Huiyan Du
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, Shandong, China
| | - Xia Li
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, Shandong, China
| | - Shuling Xu
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, Shandong, China
| | - Guiguang Cheng
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Qingwang Xue
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, Shandong, China.
| | - Hongxia Xu
- Department of Clinical Laboratory, The Third People's Hospital of Liaocheng, Liaocheng, 252059, Shandong, China.
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4
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Guo L, Li Y, Gao S, Ren L. Detection of ochratoxin A using a "turn-on" fluorescence assay based on guanine quenching of the aptamer. ANAL SCI 2023; 39:51-57. [PMID: 36242755 PMCID: PMC9569010 DOI: 10.1007/s44211-022-00199-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 09/27/2022] [Indexed: 01/06/2023]
Abstract
Ochratoxin A (OTA) is a common mycotoxin with high carcinogenicity; therefore, it is crucial to establish a simple, rapid, and sensitive method for its detection. In this study, we developed a "turn-on" fluorescence assay for detecting OTA based on guanine quenching of the aptamer. The method uses fluorescein (FAM) fluorophore to label the complementary strand of the OTA aptamer, Fc-DNA. In the absence of OTA, the Fc-DNA hybridizes with the aptamer to form a double strand. Due to the occurrence of photo-induced electron transfer (PET), the FAM fluorescence signal is quenched as the FAM on the Fc-DNA approaches the guanine of the aptamer at the 5' end. When OTA is present, the aptamer binds to it and thus, is unable to hybridize with Fc-DNA to form a double strand; the FAM fluorescence signal is restored as FAM moves away from the guanine of the aptamer. The assay achieved OTA detection at a detection limit of 28.4 nM. The application of the original guanine of the aptamer as the quenching agent helps avoid the complex designing and labeling of the aptamer, which ensures the high affinity of the aptamer for OTA. Meanwhile, this "turn-on" detection mode helps avoid potential false-positive results as in the "turn-off" mode and improves the assay's sensitivity. Additionally, the method has good selectivity and can be used to detect OTA in traditional Chinese medicine. This method provides a simple, low-cost, and rapid method for OTA detection.
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Affiliation(s)
- Limin Guo
- College of traditional Chinese medicine and food engineering, Shanxi University of Chinese Medicine, 121 University Street, Yuci, Jinzhong, 030619, People's Republic of China.
| | - Yun Li
- College of traditional Chinese medicine and food engineering, Shanxi University of Chinese Medicine, 121 University Street, Yuci, Jinzhong, 030619, People's Republic of China
| | - Shichao Gao
- College of traditional Chinese medicine and food engineering, Shanxi University of Chinese Medicine, 121 University Street, Yuci, Jinzhong, 030619, People's Republic of China
| | - Lei Ren
- College of traditional Chinese medicine and food engineering, Shanxi University of Chinese Medicine, 121 University Street, Yuci, Jinzhong, 030619, People's Republic of China
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5
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Yu H, Zhao Q. Aptamer Molecular Beacon Sensor for Rapid and Sensitive Detection of Ochratoxin A. Molecules 2022; 27:molecules27238267. [PMID: 36500359 PMCID: PMC9737911 DOI: 10.3390/molecules27238267] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/23/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022] Open
Abstract
Ochratoxin A (OTA) is a carcinogenic fungal secondary metabolite which causes wide contamination in a variety of food stuffs and environments and has a high risk to human health. Developing a rapid and sensitive method for OTA detection is highly demanded in food safety, environment monitoring, and quality control. Here, we report a simple molecular aptamer beacon (MAB) sensor for rapid OTA detection. The anti-OTA aptamer has a fluorescein (FAM) labeled at the 5' end and a black hole quencher (BHQ1) labeled at the 3' end. The specific binding of OTA induced a conformational transition of the aptamer from a random coil to a duplex-quadruplex structure, which brought FAM and BHQ1 into spatial proximity causing fluorescence quenching. Under the optimized conditions, this aptamer sensor enabled OTA detection in a wide dynamic concentration range from 3.9 nM to 500 nM, and the detection limit was about 3.9 nM OTA. This method was selective for OTA detection and allowed to detect OTA spiked in diluted liquor and corn flour extraction samples, showing the capability for OTA analysis in practical applications.
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Affiliation(s)
- Hao Yu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
- Correspondence:
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Yu H, Zhao Q. A Sensitive Aptamer Fluorescence Anisotropy Sensor for Cd 2+ Using Affinity-Enhanced Aptamers with Phosphorothioate Modification. BIOSENSORS 2022; 12:887. [PMID: 36291024 PMCID: PMC9599812 DOI: 10.3390/bios12100887] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/07/2022] [Accepted: 10/14/2022] [Indexed: 05/31/2023]
Abstract
Rapid and sensitive detection of heavy metal cadmium ions (Cd2+) is of great significance to food safety and environmental monitoring, as Cd2+ contamination and exposure cause serious health risk. In this study we demonstrated an aptamer-based fluorescence anisotropy (FA) sensor for Cd2+ with a single tetramethylrhodamine (TMR)-labeled 15-mer Cd2+ binding aptamer (CBA15), integrating the strengths of aptamers as affinity recognition elements for preparation, stability, and modification, and the advantages of FA for signaling in terms of sensitivity, simplicity, reproducibility, and high throughput. In this sensor, the Cd2+-binding-induced aptamer structure change provoked significant alteration of FA responses. To acquire better sensing performance, we further introduced single phosphorothioate (PS) modification of CBA15 at a specific phosphate backbone position, to enhance aptamer affinity by possible strong interaction between sulfur and Cd2+. The aptamer with PS modification at the third guanine (G) nucleotide (CBA15-G3S) had four times higher affinity than CBA15. Using as an aptamer probe CBA15-G3S with a TMR label at the 12th T, we achieved sensitive selective FA detection of Cd2+, with a detection limit of 6.1 nM Cd2+. This aptamer-based FA sensor works in a direct format for detection without need for labeling Cd2+, overcoming the limitations of traditional competitive immuno-FA assay using antibodies and fluorescently labeled Cd2+. This FA method enabled the detection of Cd2+ in real water samples, showing broad application potential.
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Affiliation(s)
- Hao Yu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310000, China
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Quercetin: Its Antioxidant Mechanism, Antibacterial Properties and Potential Application in Prevention and Control of Toxipathy. Molecules 2022; 27:molecules27196545. [PMID: 36235082 PMCID: PMC9571766 DOI: 10.3390/molecules27196545] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 09/28/2022] [Accepted: 09/28/2022] [Indexed: 11/30/2022] Open
Abstract
Quercetin, as a flavonol compound found in plants, has a variety of biological activities. It is widely present in nature and the human diet, with powerful oxidative properties and biological activities. In this review, the antioxidant mechanism and broad-spectrum antibacterial properties of quercetin are revealed; the intervention effects of quercetin on pesticide poisoning and the pathway of action are investigated; the toxic effects of main mycotoxins on the collection and the detoxification process of quercetin are summarized; whether it is able to reduce the toxicity of mycotoxins is proved; and the harmful effects of heavy metal poisoning on the collection, the prevention, and control of quercetin are evaluated. This review is expected to enrich the understanding of the properties of quercetin and promote its better application in clinical practice.
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8
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Qin P, Li Y, Yao B, Zhu Y, Xu J, Yao L, Chen W. Rational incorporating of loop-mediated isothermal amplification with fluorescence anisotropy for rapid, sensitive and on-site identification of pork adulteration. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.108863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Performance improved fluorescence polarization for easy and accurate authentication of chicken adulteration. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Xiao X, Zhen S. Recent advances in fluorescence anisotropy/polarization signal amplification. RSC Adv 2022; 12:6364-6376. [PMID: 35424604 PMCID: PMC8982260 DOI: 10.1039/d2ra00058j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 02/16/2022] [Indexed: 12/25/2022] Open
Abstract
Fluorescence anisotropy/polarization is an attractive and versatile technique based on molecular rotation in biochemical/biophysical systems. Traditional fluorescence anisotropy/polarization assays showed relatively low sensitivity for molecule detection, because widespread molecular masses are too small to produce detectable changes in fluorescence anisotropy/polarization value. In this review, we discuss in detail how the potential of fluorescence anisotropy/polarization signal approach considerably expanded through the implementation of mass amplification, recycle the target amplification, fluorescence probes structure-switching amplification, resonance energy transfer amplification, and provide perspectives at future directions and applications.
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Affiliation(s)
- Xue Xiao
- Key Laboratory of Basic Chemistry of the State Ethnic Commission, College of Chemistry and Environment, Southwest Minzu University 610041 Chengdu PR China
| | - Shujun Zhen
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University 400715 Chongqing PR China
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11
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Billet B, Chovelon B, Fiore E, Faure P, Ravelet C, Peyrin E. Detection of small molecules by fluorescence intensity using single dye labeled aptamers and quencher transition metal ions. Biosens Bioelectron 2022; 205:114091. [PMID: 35217256 DOI: 10.1016/j.bios.2022.114091] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/27/2022] [Accepted: 02/09/2022] [Indexed: 12/29/2022]
Abstract
We describe herein an aptamer-based sensing approach that signal the presence of small-molecule targets when fluorescent DNA probes are challenged with the Ni2+ or Co2+ quencher metal ions. Functional oligonucleotides targeting L-tyrosinamide (L-Tym), adenosine (Ade) or cocaine (Coc) were end-labeled by the Texas-Red fluorophore. A fluorescence quenching occurred upon association of these transition metal ions with the free conjugates. The formation of the target-probe complex, by the way of variations in the overall binding of quencher metal ions along the DNA strands, led to a partial restoration (for the Ade and Coc systems) or a further attenuation (for the L-Tym system) of the fluorescence intensity. The absolute signal gain varied from 40 to 180% depending on the target-probe pair investigated. The approach was also used to detect the compound Ade in a spiked biological matrix in 1 min or less. The transition metal ion-based quenching strategy is characterized by its very simple implementation, low cost, and rapid signaling.
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Affiliation(s)
- Blandine Billet
- University Grenoble Alpes, DPM UMR 5063, F-38041, Grenoble, France; Biochemistry, Toxicology and Pharmacology Department, Grenoble Site Nord CHU - Biology and Pathology Institute, F-38041, Grenoble, France; CNRS, DPM UMR 5063, F-38041, Grenoble, France
| | - Benoit Chovelon
- University Grenoble Alpes, DPM UMR 5063, F-38041, Grenoble, France; Biochemistry, Toxicology and Pharmacology Department, Grenoble Site Nord CHU - Biology and Pathology Institute, F-38041, Grenoble, France; CNRS, DPM UMR 5063, F-38041, Grenoble, France
| | - Emmanuelle Fiore
- University Grenoble Alpes, DPM UMR 5063, F-38041, Grenoble, France; CNRS, DPM UMR 5063, F-38041, Grenoble, France
| | - Patrice Faure
- University Grenoble Alpes, DPM UMR 5063, F-38041, Grenoble, France; Biochemistry, Toxicology and Pharmacology Department, Grenoble Site Nord CHU - Biology and Pathology Institute, F-38041, Grenoble, France; CNRS, DPM UMR 5063, F-38041, Grenoble, France
| | - Corinne Ravelet
- University Grenoble Alpes, DPM UMR 5063, F-38041, Grenoble, France; CNRS, DPM UMR 5063, F-38041, Grenoble, France.
| | - Eric Peyrin
- University Grenoble Alpes, DPM UMR 5063, F-38041, Grenoble, France; CNRS, DPM UMR 5063, F-38041, Grenoble, France.
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12
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Ma P, Guo H, Duan N, Ma X, Yue L, Gu Q, Wang Z. Label free structure-switching fluorescence polarization detection of chloramphenicol with truncated aptamer. Talanta 2021; 230:122349. [PMID: 33934798 DOI: 10.1016/j.talanta.2021.122349] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 03/02/2021] [Accepted: 03/18/2021] [Indexed: 12/18/2022]
Abstract
In this study, the original chloramphenicol aptamer containing 80 bases was truncated to 30 bases with high affinity by the SYBR Green I assay. It was found that the ionic strength and type affect the recognition of aptamers, especially magnesium ion played a vital role in the binding process. Furthermore, the binding performance of aptamer, including binding mode, key binding sites and conformational changes were further investigated by circular dichroism spectroscopy, UV-vis absorption spectrum and molecular docking. Based on these research data, we inferred that chloramphenicol bound to the minor groove region in the aptamer double helix. Finally, the optimized aptamer LLR10 was used to develop a novel label free fluorescence polarization assay to detect chloramphenicol within SYBR Green I as the source of fluorescence polarization signal. Under optimal conditions, the designed method showed a linear detection range of 0.1-10 nM with a detection limit of 0.06 nM. Additionally, the aptasensor exhibited a high accuracy to the detection of chloramphenicol in milk samples with a recovery rate from 93.7% to 98.4%. Therefore, the developed label free fluorescence polarization aptasensor provides a new idea for the rapid, reliable and sensitive detection of chloramphenicol, which can be applied to food safety control.
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Affiliation(s)
- Pengfei Ma
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, China
| | - Hualin Guo
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, China
| | - Nuo Duan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, China
| | - Xiaoyuan Ma
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, China
| | - Lin Yue
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, China
| | - Qianhui Gu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; Three Squirrels Inc., Wuhu, 241000, China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, Jiangsu, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, China; Collaborative Innovation Center of Food Safety and Quality Control of Jiangsu Province, Jiangnan University, Wuxi, 214122, China.
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Billet B, Chovelon B, Fiore E, Oukacine F, Petrillo MA, Faure P, Ravelet C, Peyrin E. Aptamer Switches Regulated by Post-Transition/Transition Metal Ions. Angew Chem Int Ed Engl 2021; 60:12346-12350. [PMID: 33742515 DOI: 10.1002/anie.202102254] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Indexed: 12/11/2022]
Abstract
We introduced an aptamer switch design that relies on the ability of post-transition/transition metal ions to trigger, through their coordination to nucleobases, substantial DNA destabilization. In the absence of molecular target, the addition of one such metal ion to usual aptamer working solutions promotes the formation of an alternative, inert DNA state. Upon exposure to the cognate compound, the equilibrium is shifted towards the competent DNA form. The switching process was preferentially activated by metal ions of intermediate base over phosphate complexation preference (i.e. Pb2+ , Cd2+ ) and operated with diversely structured DNA molecules. This very simple aptamer switch scheme was applied to the detection of small organics using the fluorescence anisotropy readout mode. We envision that the approach could be adapted to a variety of signalling methods that report on changes in the surface charge density of DNA receptors.
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Affiliation(s)
- Blandine Billet
- DPM UMR 5063, University Grenoble Alpes, CNRS, 38041, Grenoble, France.,Biochemistry, Toxicology and Pharmacology Department, Grenoble site Nord CHU- Biology and Pathology Institute, 38041, Grenoble, France
| | - Benoit Chovelon
- DPM UMR 5063, University Grenoble Alpes, CNRS, 38041, Grenoble, France.,Biochemistry, Toxicology and Pharmacology Department, Grenoble site Nord CHU- Biology and Pathology Institute, 38041, Grenoble, France
| | - Emmanuelle Fiore
- DPM UMR 5063, University Grenoble Alpes, CNRS, 38041, Grenoble, France
| | - Farid Oukacine
- DPM UMR 5063, University Grenoble Alpes, CNRS, 38041, Grenoble, France
| | | | - Patrice Faure
- DPM UMR 5063, University Grenoble Alpes, CNRS, 38041, Grenoble, France.,Biochemistry, Toxicology and Pharmacology Department, Grenoble site Nord CHU- Biology and Pathology Institute, 38041, Grenoble, France
| | - Corinne Ravelet
- DPM UMR 5063, University Grenoble Alpes, CNRS, 38041, Grenoble, France
| | - Eric Peyrin
- DPM UMR 5063, University Grenoble Alpes, CNRS, 38041, Grenoble, France
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14
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Billet B, Chovelon B, Fiore E, Oukacine F, Petrillo M, Faure P, Ravelet C, Peyrin E. Aptamer Switches Regulated by Post‐Transition/Transition Metal Ions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Blandine Billet
- DPM UMR 5063 University Grenoble Alpes CNRS 38041 Grenoble France
- Biochemistry, Toxicology and Pharmacology Department Grenoble site Nord CHU- Biology and Pathology Institute 38041 Grenoble France
| | - Benoit Chovelon
- DPM UMR 5063 University Grenoble Alpes CNRS 38041 Grenoble France
- Biochemistry, Toxicology and Pharmacology Department Grenoble site Nord CHU- Biology and Pathology Institute 38041 Grenoble France
| | - Emmanuelle Fiore
- DPM UMR 5063 University Grenoble Alpes CNRS 38041 Grenoble France
| | - Farid Oukacine
- DPM UMR 5063 University Grenoble Alpes CNRS 38041 Grenoble France
| | | | - Patrice Faure
- DPM UMR 5063 University Grenoble Alpes CNRS 38041 Grenoble France
- Biochemistry, Toxicology and Pharmacology Department Grenoble site Nord CHU- Biology and Pathology Institute 38041 Grenoble France
| | - Corinne Ravelet
- DPM UMR 5063 University Grenoble Alpes CNRS 38041 Grenoble France
| | - Eric Peyrin
- DPM UMR 5063 University Grenoble Alpes CNRS 38041 Grenoble France
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15
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Li Y, Zhao Q. Antibody- and aptamer-based competitive fluorescence polarization/anisotropy assays for ochratoxin A with tetramethylrhodamine-labeled ochratoxin A. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:1612-1617. [PMID: 33734257 DOI: 10.1039/d1ay00003a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Ochratoxin A (OTA) is one of the mycotoxins that often contaminate a variety of food stuffs, and it is a potential carcinogen for humans. Taking advantage of selective affinity binding and simple, rapid, and sensitive fluorescence polarization (FP)/fluorescence anisotropy (FA) analysis, here, we report two competitive FP/FA assays for OTA using tetramethylrhodamine (TMR)-labeled OTA as a fluorescence tracer and either antibody or aptamer as an affinity ligand to recognize OTA. In the absence of OTA, the TMR-labeled OTA binds with a large-sized affinity ligand, showing a high FA value due to the slow rotation of the affinity complex. When OTA is present, OTA competes with the TMR-labeled OTA tracer in binding limited amount of affinity ligand, causing more free TMR-labeled OTA and a significant FA decrease. We found that the antibody showed a stronger affinity towards TMR-labeled OTA compared to the aptamer. The antibody-based FA assay showed higher signal changes than the aptamer based FA assay due to the larger size of antibody over aptamer. The antibody-based competitive FA assay enabled the detection of 2.4 nM OTA, while the aptamer-based FA assay also achieved a detection limit of 2.4 nM OTA at 10 °C with the help of streptavidin conjugation to increase the molecular size and to improve aptamer affinity. These two competitive FA assays were selective, showing capability for analysis in diluted red wine.
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Affiliation(s)
- Yapiao Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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16
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Wu G, Xiong Z, Oh SH, Ren Y, Wang Q, Yang L. Two-color, ultra-sensitive fluorescent strategy for Ochratoxin A detection based on hybridization chain reaction and DNA tweezers. Food Chem 2021; 356:129663. [PMID: 33812184 DOI: 10.1016/j.foodchem.2021.129663] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/04/2021] [Accepted: 03/17/2021] [Indexed: 02/05/2023]
Abstract
A two-color fluorescent DNA tweezers was developed for ultrasensitive detection of Ochratoxin A (OTA) based on hairpin-locked aptamer and hybridization chain reaction (HCR) amplification strategy. OTA can bind with hairpin-locked aptamer and then trigger the HCR reaction to produce a long double-strand DNA. The side-chains of the long duplex can separately hybridize with the two locker sequences of DNA tweezer, causing the opening of DNA tweezer and the recovery of two-color fluorescent signals. It shows a good linear range from 0.02 to 0.8 ppb with limit of detection of 0.006 ppb for FAM and 0.014 ppb for Cy5, which is beyond the requirement of actual application. In addition, the two-color fluorescent strategy can greatly reduce the false positive rate. It shows excellent performance for detection of OTA in practical food sample.
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Affiliation(s)
- Ge Wu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Zhengwei Xiong
- Department of Food and Biotechnology, Graduate School, Woosuk University, Samnye-eup, Wanju-gun, Jeonbuk Province 55338, Republic of Korea; School of Biological and Chemical Engineering, Innovation Center of Lipid Resources and Children's Daily Chemicals, Chongqing University of Education, Chongqing 400067, China.
| | - Suk-Heung Oh
- Department of Food and Biotechnology, Graduate School, Woosuk University, Samnye-eup, Wanju-gun, Jeonbuk Province 55338, Republic of Korea
| | - Yanrong Ren
- School of Biological and Chemical Engineering, Innovation Center of Lipid Resources and Children's Daily Chemicals, Chongqing University of Education, Chongqing 400067, China
| | - Qiang Wang
- School of Biological and Chemical Engineering, Innovation Center of Lipid Resources and Children's Daily Chemicals, Chongqing University of Education, Chongqing 400067, China
| | - Lizhu Yang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
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17
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Liu YX, Xie TJ, Li CH, Ye QC, Tian LL, Li YF, Huang CZ, Zhen SJ. A crosslinked submicro-hydrogel formed by DNA circuit-driven protein aggregation amplified fluorescence anisotropy for biomolecules detection. Anal Chim Acta 2021; 1154:338319. [PMID: 33736800 DOI: 10.1016/j.aca.2021.338319] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 02/07/2021] [Accepted: 02/08/2021] [Indexed: 11/25/2022]
Abstract
Protein is an excellent molecular mass amplifier without fluorescence quenching effect for fluorescence anisotropy (FA) assay. However, in traditional protein amplified FA methods, the binding ratio between amplifier and dye-modified probe is 1:1 or one target can only induce FA change of one fluorophore on probe, resulting in low sensitivity. Herein, we developed a simple FA strategy with high accuracy and sensitivity by using a crosslinked submicro-hydrogel that was formed through a catalyzed hairpin assembly (CHA) assisted protein aggregation as a novel FA amplifier. In the presence of catalyst, the CHA process was initiated through the toehold-mediated strand exchange reaction, which led to the formation of a dye and biotin-labeled Y-shaped H1-H2 duplex (YHD) and recycling of catalyst. With the introduction of streptavidin, a crosslinked submicro-hydrogel was formed by strong binding affinity between biotin on YHD and streptavidin, resulting in an increased FA of fluorescent dye. After rational design of the catalyst sequence, this method has been utilized for the detection of miRNA-145, staphylococcal enterotoxin B (SEB) and ATP with an LOD of 2.5 nM, 92 pg mL-1 and 3.6 μM, respectively. Moreover, this FA assay has been successfully applied for direct detection of target in biological samples, demonstrating its practicality in complex biological systems.
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Affiliation(s)
- Yu Xin Liu
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China
| | - Tian Jin Xie
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China
| | - Chun Hong Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, 400715, Chongqing, PR China
| | - Qi Chao Ye
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China
| | - Li Li Tian
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China
| | - Yuan Fang Li
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China
| | - Cheng Zhi Huang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, 400715, Chongqing, PR China
| | - Shu Jun Zhen
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China.
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18
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Hendrickson OD, Taranova NA, Zherdev AV, Dzantiev BB, Eremin SA. Fluorescence Polarization-Based Bioassays: New Horizons. SENSORS (BASEL, SWITZERLAND) 2020; 20:E7132. [PMID: 33322750 PMCID: PMC7764623 DOI: 10.3390/s20247132] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 02/06/2023]
Abstract
Fluorescence polarization holds considerable promise for bioanalytical systems because it allows the detection of selective interactions in real time and a choice of fluorophores, the detection of which the biosample matrix does not influence; thus, their choice simplifies and accelerates the preparation of samples. For decades, these possibilities were successfully applied in fluorescence polarization immunoassays based on differences in the polarization of fluorophore emissions excited by plane-polarized light, whether in a free state or as part of an immune complex. However, the results of recent studies demonstrate the efficacy of fluorescence polarization as a detected signal in many bioanalytical methods. This review summarizes and comparatively characterizes these developments. It considers the integration of fluorescence polarization with the use of alternative receptor molecules and various fluorophores; different schemes for the formation of detectable complexes and the amplification of the signals generated by them. New techniques for the detection of metal ions, nucleic acids, and enzymatic reactions based on fluorescence polarization are also considered.
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Affiliation(s)
- Olga D. Hendrickson
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (O.D.H.); (N.A.T.); (B.B.D.); (S.A.E.)
| | - Nadezhda A. Taranova
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (O.D.H.); (N.A.T.); (B.B.D.); (S.A.E.)
| | - Anatoly V. Zherdev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (O.D.H.); (N.A.T.); (B.B.D.); (S.A.E.)
| | - Boris B. Dzantiev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (O.D.H.); (N.A.T.); (B.B.D.); (S.A.E.)
| | - Sergei A. Eremin
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (O.D.H.); (N.A.T.); (B.B.D.); (S.A.E.)
- Department of Chemical Enzymology, Chemical Faculty, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia
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19
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Liu L, Zhao Q. A simple fluorescence anisotropy assay for detection of bisphenol A using fluorescently labeled aptamer. J Environ Sci (China) 2020; 97:19-24. [PMID: 32933735 DOI: 10.1016/j.jes.2020.04.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 04/04/2020] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
Bisphenol A (BPA) is one of the environmental endocrine disruptors (EDCs), and BPA contamination in environment can cause high risks to human health. Rapid determination of BPA on sites is in high demand in environmental analysis. Taking advantage of aptamers as affinity ligands and fluorescence anisotropy (FA) analysis, we developed a simple and rapid FA assay for BPA by employing a single tetramethylrhodamine (TMR) labeled short 35-mer DNA aptamer against BPA. The assay is based on the BPA-binding induced conformation change of TMR-labeled aptamer and alteration of interaction between TMR and guanine bases, resulting in change of FA signals. We screened the FA change of aptamer probes having TMR label on a specific site of the aptamer upon BPA addition. The aptamer with a TMR label on the 22nd T base showed large FA-decreasing response to BPA and maintained good binding affinity to BPA. By using this TMR-labeled aptamer, we achieved FA detection of BPA with a detection limit of 0.5 μmol/L under the optimized conditions. This assay was selective towards BPA and enabled the detection of BPA spiked in tap water sample, showing the potential applications on water samples.
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Affiliation(s)
- Liying Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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20
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Wang C, Liu L, Zhao Q. Low Temperature Greatly Enhancing Responses of Aptamer Electrochemical Sensor for Aflatoxin B1 Using Aptamer with Short Stem. ACS Sens 2020; 5:3246-3253. [PMID: 33052655 DOI: 10.1021/acssensors.0c01572] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Aflatoxin B1 (AFB1), one of the most toxic mycotoxins, poses great health risks. Rapid and sensitive detection of AFB1 is important for food safety, environment monitoring, and health risk assessment. We report here the development of a simple and reusable electrochemical aptasensor for rapid and sensitive detection of AFB1. Main improvements were achieved through engineering an aptamer containing a short stem-loop structure and enhancing the binding affinity at a lower temperature. The DNA aptamer with a methylene blue (MB) label at one end was immobilized on a gold electrode. Upon AFB1 binding, the aptamer folded into a stem-loop structure and brought MB close to the electrode surface, resulting in increases in electric current. The aptamer having a shorter stem (2-4 bp) underwent a larger conformation change upon target binding. The sensors built with the aptamer containing a 2 bp stem generated much higher signal-on responses to AFB1 at 4 °C than at room temperature (25 °C). The improvements resulted in a detection limit of 6 pM, enabling the determination of trace AFB1 in a complex sample matrix. This study demonstrates that low temperature greatly enhances the performance of aptamer electrochemical sensors. This aptasensor is simple to construct and readily regenerated by washing with deionized water for reuse. This aptasensor strategy could be applied to the development of an electrochemical aptasensor for other targets.
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Affiliation(s)
- Chao Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liying Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310000, China
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21
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Hitabatuma A, Pang YH, Yu LH, Shen XF. A competitive fluorescence assay based on free-complementary DNA for ochratoxin A detection. Food Chem 2020; 342:128303. [PMID: 33158674 DOI: 10.1016/j.foodchem.2020.128303] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 09/20/2020] [Accepted: 09/30/2020] [Indexed: 01/16/2023]
Abstract
An ultrasensitive, rapid, and specific method for Ochratoxin A (OTA) detection was designed using complementary sequence to aptamer as a target of molecular beacon (MB). The designed loop structure of the MB has the same sequence as the aptamer with a complementary DNA (cDNA) which translates the level of the target into a measurable response. The presence of the target holds aptamer at the corresponding amount and the additional cDNAs are consumed by unbound aptamers which avails free cDNAs that resulting in fluorescence rising due to unfolding of MBs. Under the optimized conditions, the fluorescence intensity increased linearly with OTA concentration over the range of 10 pg mL-1-1 µg mL-1 with the detection limit of 0.247 pg mL-1. The application of this assay in wheat sample in comparison with HPLC-MS/MS method, demonstrated that the new assay could be a potential sensing platform for OTA detection.
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Affiliation(s)
- Aloys Hitabatuma
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, PR China
| | - Yue-Hong Pang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, PR China
| | - Li-Hong Yu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, PR China
| | - Xiao-Fang Shen
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, PR China; International Joint Laboratory on Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, PR China.
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22
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Li Y, Zhao Q. Aptamer structure switch fluorescence anisotropy assay for aflatoxin B1 using tetramethylrhodamine-guanine interaction to enhance signal change. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2020.01.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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23
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Aptamer binding assays and molecular interaction studies using fluorescence anisotropy - A review. Anal Chim Acta 2020; 1125:267-278. [PMID: 32674773 DOI: 10.1016/j.aca.2020.05.061] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/16/2020] [Accepted: 05/23/2020] [Indexed: 12/26/2022]
Abstract
Binding of nucleic acid aptamers to specific targets and detection with fluorescence anisotropy (FA) or fluorescence polarization (FP) take advantage of the complementary features of aptamers and the fluorescence techniques. We review recent advances in affinity binding assays using aptamers and FA/FP, with an emphasis on studies of molecular interactions and identification of binding sites. Aptamers provide several benefits, including the ease of labelling fluorophores on specific sites, binding-induced changes in aptamer structures, hybridization of the aptamers to complementary sequences, changes in molecular volume upon binding of the aptamer to its target, and adsorption of aptamers onto nanomaterials. Some of these benefits have been utilized for FA/FP assays. Once the aptamer binds to its target, the resulting changes in molecular volume (size), structure, local rotation of the fluorophore, and/or the fluorescence lifetime influence changes to the FA/FP values. Measurements of these fluorescence anisotropy/polarization changes have provided insights into the molecular interactions, such as the binding affinity and the site of binding. Studies of molecular interactions conducted in homogeneous solutions, as well as those with separations, e.g., capillary electrophoresis, have been summarized in this review. Studies on mapping the position of binding in aptamers at the single nucleotide level have demonstrated a unique benefit of the FA/FP techniques and pointed to an exciting direction for future research.
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24
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Li Y, Zhang N, Wang H, Zhao Q. Fluorescence Anisotropy-Based Signal-Off and Signal-On Aptamer Assays Using Lissamine Rhodamine B as a Label for Ochratoxin A. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:4277-4283. [PMID: 32182058 DOI: 10.1021/acs.jafc.0c00549] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Ochratoxin A (OTA), a common mycotoxin, has attracted great concern as many foodstuffs can suffer from OTA contamination; OTA causes harmful effects on human and animals. Rapid and sensitive detection of OTA is demanded in many fields for agricultural product quality, food safety, and health. Aptamer fluorescence polarization/anisotropy (FP/FA) assays integrate advantages of nucleic acid aptamers (e.g., easy preparation, high stability, and low cost) and FP/FA analysis (e.g., high sensitivity, rapidity, simplicity, and robustness). Here, we report the preparation of lissamine rhodamine B labeled OTA and developed competitive aptamer fluorescence anisotropy (FA) assays for OTA with signal-off or signal-on responses by using this fluorescently labeled probe. In the signal-off FA assay, the binding between the fluorescent probe and aptamer gave a large FA signal due to molecular volume increase, and the fluorescent probe was displaced from the aptamer in the presence of OTA target, causing FA to decrease. To further enhance the FA change in the signal-off assay, large-sized streptavidin was conjugated on the aptamer, and this assay allowed for a detection limit of 2.5 nM and a more remarkable FA decrease. Furthermore, we found that the fluorescent probe could interact with Tween 20, which caused the fluorescent probe to show a higher FA value than that of the aptamer-fluorescent probe complex. A signal-on FA assay was achieved in the binding buffer containing 0.1% Tween 20, with a detection limit of 10 nM. Signal-off and signal-on FA methods both were selective and enabled detection of OTA spiked in red wine samples, showing capability for target analysis in complex sample matrix.
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Affiliation(s)
- Yapiao Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ning Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Hailin Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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25
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Liu YX, Xiao X, Li CH, Men C, Ye QC, Lv WY, Li YF, Huang CZ, Zhen SJ. DNA nanosheet as an excellent fluorescence anisotropy amplification platform for accurate and sensitive biosensing. Talanta 2020; 211:120730. [PMID: 32070579 DOI: 10.1016/j.talanta.2020.120730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 01/06/2020] [Accepted: 01/08/2020] [Indexed: 12/14/2022]
Abstract
Recently, various inorganic nanomaterials have been used as fluorescence anisotropy (FA) enhancers for biosensing successfully. However, most of them are size-uncontrollable and possess an intensive fluorescence quenching ability, which will seriously reduce the accuracy and sensitivity of FA method. Herein, we report a two-dimensional DNA nanosheet (DNS) without fluorescence quenching effect as a novel FA amplification platform. In our strategy, fluorophore-labeled probe DNA (pDNA) is linked onto the DNS surface through the hybridization with the handle DNA (hDNA) that extended from the DNS, resulting in the significantly enhanced FA value. After the addition of target, the pDNA was released from the DNS surface due to the high affinity between the hDNA and target, and the FA was decreased. Thus, target could be detected by the significantly decreased FA value. The linear range was 10-50 nM and the limit of detection was 8 nM for the single-stranded DNA detection. This new method is general and has been also successfully applied for the detection of ATP and thrombin sensitively. Our method improved the accuracy of FA assay and has great potential to detect series of biological analytes in complex biosensing systems.
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Affiliation(s)
- Yu Xin Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China
| | - Xue Xiao
- College of Chemistry and Environment Protection Engineering, Southwest Minzu University, Chengdu, 610041, China
| | - Chun Hong Li
- College of Pharmaceutical Sciences, Southwest University, 400715, Chongqing, PR China
| | - Chen Men
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China
| | - Qi Chao Ye
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China
| | - Wen Yi Lv
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China
| | - Yuan Fang Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China
| | - Cheng Zhi Huang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China; College of Pharmaceutical Sciences, Southwest University, 400715, Chongqing, PR China
| | - Shu Jun Zhen
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, PR China.
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26
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Qin P, Huang D, Xu Z, Guan Y, Bing Y, Yu A. A potential reusable fluorescent aptasensor based on magnetic nanoparticles for ochratoxin A analysis. OPEN CHEM 2019. [DOI: 10.1515/chem-2019-0140] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
AbstractAn aptasensor for the detection of ochratoxin A (OTA) in environmental samples was developed. It displayed high sensitivity and good selectivity. Factors such as specific binding between a FAM (5-carboxyfluorescein)-labeled aptamer (f-RP) and OTA, and a magnetic property of a streptavidin magbeads-modified capture probe (bm-CP) resulted in aptasensor’s linear relationship between fluorescence intensity and the concentration of OTA. This characteristic is present at the OTA concentration ranges from 0.100 μM to 25.00 μM with a LOD (limit of detection) of 0.0690 μM. The bm-CP can be reused through melting, washing and magnetic separation, which contributes to cost reduction. In addition, the proposed method is simple and detection process is fast. The aptasensor can be used in real samples.
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Affiliation(s)
- Pinzhu Qin
- School of Environment and Ecology, Jiangsu Open University, 832 Yingtian Street, Nanjing, Jiangsu, 210019, P.R. China
- Jiangsu Province Key Laboratory of Environmental Engineering, Nanjing, Jiangsu, 210036, P.R. China
| | - Dawei Huang
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment of PRC, Guangzhou, 510655, P.R. China
| | - Zihao Xu
- School of Environment and Ecology, Jiangsu Open University, 832 Yingtian Street, Nanjing, Jiangsu, 210019, P.R. China
| | - Ying Guan
- School of Environment and Ecology, Jiangsu Open University, 832 Yingtian Street, Nanjing, Jiangsu, 210019, P.R. China
- Jiangsu Province Key Laboratory of Environmental Engineering, Nanjing, Jiangsu, 210036, P.R. China
| | - Yongxin Bing
- South China Institute of Environmental Sciences, Ministry of Ecology and Environment of PRC, Guangzhou, 510655, P.R. China
| | - Ang Yu
- Jiangsu Province Key Laboratory of Environmental Engineering, Nanjing, Jiangsu, 210036, P.R. China
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27
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Li Y, Zhao Q. Aptamer Structure Switch Fluorescence Anisotropy Assay for Small Molecules Using Streptavidin as an Effective Signal Amplifier Based on Proximity Effect. Anal Chem 2019; 91:7379-7384. [PMID: 31079453 DOI: 10.1021/acs.analchem.9b01253] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Fluorescence polarization/anisotropy (FP/FA) approaches are appealing for targets sensing in homogeneous solution due to simplicity, reproducibility and sensitivity. Taking advantage of aptamers, aptamer structure switch FA methods are unique for small molecule detection based on the competition between aptamer-target binding and the hybridization of aptamer and complementary DNA (cDNA). However, usually small FA change is generated in these aptamer assays that only rely on size change caused by hybridization of an oligonucleotide because of the rapid local rotation of fluorophores and small mass change. Here we describe a simple and general aptamer structure switch FA assay for small molecules by employing a large-sized streptavidin (SA) as an effective signal amplifier based on proximity effect to reduce local rotation of fluorophore. In this design, the SA-labeled cDNA hybridizes with fluorescein (FAM)-labeled aptamer, drawing FAM close to SA and bringing a much higher FA value due to restricted local rotation of FAM. Small molecule-aptamer probe binding causes displacement of the SA-labeled cDNA and great decrease of FA. The closeness of SA to FAM in the duplex is key for this proposed strategy to produce large FA changes in target detection. Our method enabled to detect 60 pM aflatoxin B1 (AFB1), 1 nM ochratoxin A (OTA), and 0.5 μM adenosine triphosphate (ATP), respectively. This aptamer FA method combines the merits of aptamers and FA analysis, and it is promising in applications of detection of small molecules with good sensitivity.
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Affiliation(s)
- Yapiao Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
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28
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Fluorescence polarization assays for chemical contaminants in food and environmental analyses. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.03.013] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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29
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30
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Ji W, Zhang Z, Tian Y, Yang Z, Cao Z, Zhang L, Qi Y, Chang J, Zhang S, Wang H. Shape Coding Microhydrogel for a Real-Time Mycotoxin Detection System Based on Smartphones. ACS APPLIED MATERIALS & INTERFACES 2019; 11:8584-8590. [PMID: 30715838 DOI: 10.1021/acsami.8b21851] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
How to create a portable and quick way to detect multiple coexisting toxins is closely related to everyone's health. In this paper, we have established a real-time mycotoxin detection system that combined shape-encoded hydrogel particle preparation technology and image processing technology with smartphone portable devices. First, hydrogel microparticles containing a specific recognition toxin aptamer were programmable synthesized by stop-flow lithography. The hydrogel particles prepared by us had clear, variable signals and high coding capacity. Then, the indirect competitive detection based on aptamers was simple and rapid; the total reaction time was no more than 1 h 45 min and the image processing process was no more than 10 s. Finally, images could be captured by cameras on portable devices and smartphones. The self-built Android app that used the image recognition program installed on the smartphone would analyze the image and return the results in real time. The results showed that the detection limit reached 0.1 ng/mL, which was lower than the standard. In summary, this platform provides a fast, portable, high-throughput detection solution for real-time detection of mycotoxins, with excellent application prospects.
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Affiliation(s)
| | | | | | - Zhengchun Yang
- School of Electrical and Electronic Engineering, Tianjin Key Laboratory of Film Electronic & Communication Devices , Tianjin University of Technology , Tianjin 300384 , China
| | - Zongsheng Cao
- School of Electrical and Electronic Engineering, Tianjin Key Laboratory of Film Electronic & Communication Devices , Tianjin University of Technology , Tianjin 300384 , China
| | | | - Yangyang Qi
- School of Electrical and Electronic Engineering, Tianjin Key Laboratory of Film Electronic & Communication Devices , Tianjin University of Technology , Tianjin 300384 , China
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31
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Nucleic acid aptamers improving fluorescence anisotropy and fluorescence polarization assays for small molecules. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.11.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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32
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Samokhvalov AV, Safenkova IV, Zherdev AV, Dzantiev BB. The registration of aptamer-ligand (ochratoxin A) interactions based on ligand fluorescence changes. Biochem Biophys Res Commun 2018; 505:536-541. [PMID: 30269817 DOI: 10.1016/j.bbrc.2018.09.109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 09/17/2018] [Indexed: 12/12/2022]
Abstract
The fluorescent properties of ligands can change when they bind to specific receptors. Modulated by the transition of the ligand from the free to the bound state, fluorescence makes it possible both to detect this ligand and quantitatively register its binding. We characterized the interaction of ochratoxin A (OTA) with the specific G-quadruplex aptamer through excitation-emission matrix fluorescence spectroscopy. It was shown that the formation of the complex changes the OTA fluorescence spectrum both in the region of the main peak at λex/λem 380/430 nm and in the region of peak at λex/λem 265/425 nm. At pH 8.5 and OTA concentration of 30 nM, this peak is smaller in intensity than the main peak of fluorescence. The formation of the complex with the aptamer leads to an increase of the fluorescence at λex/λem 265/425 nm up to 6.5 times, which makes it up to 4.9 times more intense than fluorescence at 380/430 nm. Fluorescence of the G-quadruplex aptamer (donor) takes part in increasing of the OTA (acceptor) emission at λex/λem 265/425 nm due to the resonance energy transfer. The concentration regularities of the modulated fluorescence of OTA at λex/λem 265/425 nm have been studied. Their correspondence to the calculations of complexation conducted on the basis of the dissociation constant is shown.
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Affiliation(s)
- Alexey V Samokhvalov
- A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, 119071, Moscow, Russia
| | - Irina V Safenkova
- A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, 119071, Moscow, Russia
| | - Anatoly V Zherdev
- A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, 119071, Moscow, Russia
| | - Boris B Dzantiev
- A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, 119071, Moscow, Russia.
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33
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A fluorometric aptamer-based assay for ochratoxin A using magnetic separation and a cationic conjugated fluorescent polymer. Mikrochim Acta 2018; 185:427. [PMID: 30135994 DOI: 10.1007/s00604-018-2962-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 08/12/2018] [Indexed: 12/13/2022]
Abstract
A fluorometric aptamer-based assay for ochratoxin A (OTA) is described. It is making use of magnetic separation and a cationic conjugated fluorescent polymer. Amino-tagged aptamer (Apt) against OTA is immobilized on magnetic beads (MBs) to form a conjugate of type Apt-MBs. The immobilized aptamer is partially complementary to carboxyfluorescein-labeled DNA which binds to the Apt-MBs via hybridization if OTA is absent. Only few FAM-DNA will remain in the supernatant after magnetic separation, and only weak fluorescence resonance energy transfer (FRET) occurs on addition of the fluorescent polymer. If, however, OTA is present, it will bind to the aptamer and prevent the hybridization between Apt-DNA and FAM-DNA. This results in the presence of large amounts of FAM-DNA in the supernatant after magnetic separation. On addition of fluorescent polymer, efficient FRET occurs from the polymer to FAM-DNA. Fluorescence, best measured at excitation/emission peaks of 370/530 nm, increases with increasing concentrations of OTA. This assay is highly sensitive and selective. The detection limit is as low as 0.11 ng mL-1. This is 6 times lower than the aptamer assay without using the fluorescent polymer. Conceivably, this method has a wider scope in that it may be extended to other mycotoxins by simply changing the aptamer. Graphical Abstract Schematic of a fluorometric aptamer assay for ochratoxin A (OTA). It is based on magnetic separation coupled with a cationic conjugated polymer (PFP).
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34
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Sun L, Zhao Q. Direct fluorescence anisotropy approach for aflatoxin B1 detection and affinity binding study by using single tetramethylrhodamine labeled aptamer. Talanta 2018; 189:442-450. [PMID: 30086944 DOI: 10.1016/j.talanta.2018.07.036] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 07/07/2018] [Accepted: 07/11/2018] [Indexed: 12/20/2022]
Abstract
The discovery of aptamers for aflatoxin B1 (AFB1), one of toxic carcinogens, has allowed to develop aptamer-based sensors and assays for aflatoxin. In this work, we reported a direct fluorescence anisotropy (FA) assay for investigation of aptamer-AFB1 binding and detection of AFB1 with the aptamer having single tetramethylrhodamine (TMR) label on a specific site. From a series of labeling sites of a 50-mer aptamer, we screened out the aptamer with TMR labeling at the 26th T, capable of generating good and large FA-decreasing response to AFB1. By using the T26-labeled 50-mer aptamer probe in FA analysis, we determined the affinity and selectivity of aptamer, and identified the crucial region of aptamer and optimum experimental conditions for strong binding. The aptamer could be further truncated to as short as 26 nucleotides in length, and this shorter aptamer possessed a simple stem-loop secondary structure and retained good binding affinity. Nucleotides in the loop region of the aptamer were conserved and important for affinity recognition. We achieved FA detection of AFB1 with a detection limit about 2 nM by using the TMR-labeled aptamer probe. The cross reactivity of aflatoxin B1, aflatoxin B2, aflatoxin M1, aflatoxin M2, aflatoxin G1, and aflatoxin G2 with aptamer were estimated to be 100%, 61%, 23%, 21%, 6.3%, 6.5%, respectively. The aptamer probe presented good selectivity over other mycotoxins and showed potential in complex sample analysis. This study of affinity binding between aptamer and aflatoxins will be helpful for developing other aptamer-based assays and sensors for aflatoxins.
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Affiliation(s)
- Linlin Sun
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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35
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Samokhvalov AV, Safenkova IV, Eremin SA, Zherdev AV, Dzantiev BB. Measurement of (Aptamer–Small Target) KD Using the Competition between Fluorescently Labeled and Unlabeled Targets and the Detection of Fluorescence Anisotropy. Anal Chem 2018; 90:9189-9198. [DOI: 10.1021/acs.analchem.8b01699] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Alexey V. Samokhvalov
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Irina V. Safenkova
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Sergei A. Eremin
- Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Anatoly V. Zherdev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Boris B. Dzantiev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
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36
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Qiao D, Xu J, Qin P, Yao L, Lu J, Eremin S, Chen W. Highly Simple and Sensitive Molecular Amplification-Integrated Fluorescence Anisotropy for Rapid and On-Site Identification of Adulterated Beef. Anal Chem 2018; 90:7171-7175. [DOI: 10.1021/acs.analchem.8b01374] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Dongqing Qiao
- School of Food Science & Engineering, Engineering Research Center of Bio-Process, MOE, Hefei University of Technology, Hefei 230009, China
| | - Jianguo Xu
- School of Food Science & Engineering, Engineering Research Center of Bio-Process, MOE, Hefei University of Technology, Hefei 230009, China
| | - Panzhu Qin
- School of Food Science & Engineering, Engineering Research Center of Bio-Process, MOE, Hefei University of Technology, Hefei 230009, China
| | - Li Yao
- School of Food Science & Engineering, Engineering Research Center of Bio-Process, MOE, Hefei University of Technology, Hefei 230009, China
| | - Jianfeng Lu
- School of Food Science & Engineering, Engineering Research Center of Bio-Process, MOE, Hefei University of Technology, Hefei 230009, China
| | - Sergei Eremin
- National Research Technical University “MISiS”, Leninsky Prospekt 4, Moscow, Russia
| | - Wei Chen
- School of Food Science & Engineering, Engineering Research Center of Bio-Process, MOE, Hefei University of Technology, Hefei 230009, China
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37
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Ma L, Xu B, Liu L, Tian W. A Label-free Fluorescent Aptasensor for Turn-on Monitoring Ochratoxin A Based on AIE-active Probe and Graphene Oxide. Chem Res Chin Univ 2018. [DOI: 10.1007/s40242-018-8072-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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38
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Perrier S, Guieu V, Chovelon B, Ravelet C, Peyrin E. Panoply of Fluorescence Polarization/Anisotropy Signaling Mechanisms for Functional Nucleic Acid-Based Sensing Platforms. Anal Chem 2018. [PMID: 29513518 DOI: 10.1021/acs.analchem.7b04593] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Fluorescence polarization/anisotropy is a very popular technique that is widely used in homogeneous-phase immunoassays for the small molecule quantification. In the present Feature, we discuss how the potential of this signaling approach considerably expanded during the last 2 decades through the implementation of a myriad of original transducing strategies that use functional nucleic acid recognition elements as a promising alternative to antibodies.
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Affiliation(s)
- Sandrine Perrier
- University Grenoble Alpes , DPM UMR 5063, F-38041 Grenoble , France.,CNRS , DPM UMR 5063, F-38041 Grenoble , France
| | - Valérie Guieu
- University Grenoble Alpes , DPM UMR 5063, F-38041 Grenoble , France.,CNRS , DPM UMR 5063, F-38041 Grenoble , France
| | - Benoit Chovelon
- University Grenoble Alpes , DPM UMR 5063, F-38041 Grenoble , France.,CNRS , DPM UMR 5063, F-38041 Grenoble , France.,Département de Biochimie, Toxicologie et Pharmacologie , CHU de Grenoble Site Nord-Institut de Biologie et de Pathologie , F-38041 Grenoble , France
| | - Corinne Ravelet
- University Grenoble Alpes , DPM UMR 5063, F-38041 Grenoble , France.,CNRS , DPM UMR 5063, F-38041 Grenoble , France
| | - Eric Peyrin
- University Grenoble Alpes , DPM UMR 5063, F-38041 Grenoble , France.,CNRS , DPM UMR 5063, F-38041 Grenoble , France
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39
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Zhen SJ, Xiao X, Li CH, Huang CZ. An Enzyme-Free DNA Circuit-Assisted Graphene Oxide Enhanced Fluorescence Anisotropy Assay for MicroRNA Detection with Improved Sensitivity and Selectivity. Anal Chem 2017; 89:8766-8771. [DOI: 10.1021/acs.analchem.7b00955] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shu Jun Zhen
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry
(Southwest University), Ministry of Education, College of Chemistry
and Chemical Engineering, and ‡College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People’s Republic of China
| | - Xue Xiao
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry
(Southwest University), Ministry of Education, College of Chemistry
and Chemical Engineering, and ‡College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People’s Republic of China
| | - Chun Hong Li
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry
(Southwest University), Ministry of Education, College of Chemistry
and Chemical Engineering, and ‡College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People’s Republic of China
| | - Cheng Zhi Huang
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry
(Southwest University), Ministry of Education, College of Chemistry
and Chemical Engineering, and ‡College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People’s Republic of China
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40
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Li Y, Sun L, Zhao Q. Competitive fluorescence anisotropy/polarization assay for ATP using aptamer as affinity ligand and dye-labeled ATP as fluorescence tracer. Talanta 2017; 174:7-13. [PMID: 28738645 DOI: 10.1016/j.talanta.2017.05.077] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 05/18/2017] [Accepted: 05/26/2017] [Indexed: 12/26/2022]
Abstract
We developed an aptamer-based competitive fluorescence anisotropy (FA)/fluorescence polarization (FP) assay for adenosine triphosphate (ATP). Different from the traditional fluorescence polarization immunoassays for small molecules, here DNA aptamer against ATP was used as affinity ligand, and tetramethylrhodamine (TMR) labeled ATP served as fluorescent tracer. The binding between TMR-labeled ATP and aptamer gave large FA due to molecular volume increase and restricted rotation of the dye-labeled ATP. When ATP was added in solution, ATP competitively displaced the TMR-labeled ATP from aptamer affinity complex, causing decrease of FA of TMR-labeled ATP. The buffer containing MgCl2 and incubation at low temperature were preferred for large FA change in the FA assay. The FA change was further enhanced in this competitive FA assay by increasing the molecular weight of aptamer through extension of aptamer sequences or conjugating streptavidin protein on aptamer. This method allowed for the detection of ATP in the range from 0.5μM to 1mM, generating the maximum FA change about 0.187 (corresponding maximum FP change about 0.242). The detection of ATP spiked in diluted urine or serum sample was achieved, showing capability for analysis in complex sample matrix. This assay also enabled the detection of the analogues of ATP, e.g. adenosine, adenosine monophosphate (AMP), and adenosine diphosphate (ADP) with similar sensitivity. This aptamer-based competitive FA assay takes advantages of aptamer in ease of synthesis, good thermal stability, and facile modulating the molecular mass of aptamer.
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Affiliation(s)
- Yapiao Li
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Linlin Sun
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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41
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Liu Y, Zhao Q. Direct fluorescence anisotropy assay for cocaine using tetramethylrhodamine-labeled aptamer. Anal Bioanal Chem 2017; 409:3993-4000. [PMID: 28429063 DOI: 10.1007/s00216-017-0349-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 03/04/2017] [Accepted: 03/28/2017] [Indexed: 01/15/2023]
Abstract
Development of simple, sensitive, and rapid method for cocaine detection is important in medicine and drug abuse monitoring. Taking advantage of fluorescence anisotropy and aptamer, this study reports a direct fluorescence anisotropy (FA) assay for cocaine by employing an aptamer probe with tetramethylrhodamine (TMR) labeled on a specific position. The binding of cocaine and the aptamer causes a structure change of the TMR-labeled aptamer, leading to changes of the interaction between labeled TMR and adjacent G bases in aptamer sequence, so FA of TMR varies with increasing of cocaine. After screening different labeling positions of the aptamer, including thymine (T) bases and terminals of the aptamer, we obtained a favorable aptamer probe with TMR labeled on the 25th base T in the sequence, which exhibited sensitive and significant FA-decreasing responses upon cocaine. Under optimized assay conditions, this TMR-labeled aptamer allowed for direct FA detection of cocaine as low as 5 μM. The maximum FA change reached about 0.086. This FA method also enabled the detection of cocaine spiked in diluted serum and urine samples, showing potential for applications. Graphical Abstract The binding of cocaine to the TMR-labeled aptamer causes conformation change and alteration of the intramolecular interaction between TMR and bases of aptamer, leading to variance of fluorescence anisotropy (FA) of TMR, so direct FA analyis of cocaine is achieved.
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Affiliation(s)
- Yingxiong Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,Institute of Environmental Science, College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi, 030006, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China.
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42
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Samokhvalov AV, Safenkova IV, Eremin SA, Zherdev AV, Dzantiev BB. Use of anchor protein modules in fluorescence polarisation aptamer assay for ochratoxin A determination. Anal Chim Acta 2017; 962:80-87. [PMID: 28231883 DOI: 10.1016/j.aca.2017.01.024] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 12/30/2016] [Accepted: 01/09/2017] [Indexed: 01/01/2023]
Abstract
A new strategy for sensitive fluorescence polarisation (FP) analysis is proposed which uses aptamer as the receptor and anchor protein modules as the enhancers by including the aptamers in complexes with protein modules. This approach is based on increasing the size differences of bound and unbound fluorophores. The strategy was applied in an ochratoxin A (ОТА) assay with the competitive binding of fluorophore-labelled and free OTA with aptamer-based receptors. We showed that the binding of labelled OTA with aptamer included in complexes with anchors led to higher a FP than binding with free aptamer. This allowed the aptamer concentration to be reduced, thus lowering the limit of detection by a factor of 40, down to 3.6 nM. The assay time was 15 min. To evaluate the applicability of the FP assay with aptamer-anchor complex to real samples, we conducted OTA measurements in spiked white wine. The OTA limit of detection in wine was 2.8 nM (1.1 μg/kg), and the recoveries ranged from 83% to 113%. The study shows that the proposed anchor strategy is efficient for increasing the sensitivity of FP-based aptamer assays.
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Affiliation(s)
- Alexey V Samokhvalov
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Irina V Safenkova
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Sergei A Eremin
- Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Anatoly V Zherdev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Boris B Dzantiev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia.
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43
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Lv X, Zhang Y, Liu G, Du L, Wang S. Aptamer-based fluorescent detection of ochratoxin A by quenching of gold nanoparticles. RSC Adv 2017. [DOI: 10.1039/c7ra01474k] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A simple, rapid, low cost and highly sensitive method for the detection of ochratoxin A (OTA) was developed based on the principle that dispersed AuNPs show a better fluorescence quenching effect than aggregated AuNPs.
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Affiliation(s)
- Xin Lv
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
| | - Yuanfu Zhang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
| | - Guofu Liu
- College of Life Science
- Liaocheng University
- Liaocheng 252059
- China
| | - Lingyun Du
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
| | - Shuhao Wang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
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44
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Duan N, Xu B, Wu S, Wang Z. Magnetic Nanoparticles-based Aptasensor Using Gold Nanoparticles as Colorimetric Probes for the Detection of Salmonella typhimurium. ANAL SCI 2016; 32:431-6. [PMID: 27063716 DOI: 10.2116/analsci.32.431] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This paper presents a sensitive and convenient visual methodology for Salmonella typhimurium detection using gold nanoparticles (AuNPs) as colorimetric probes and magnetic nanoparticles (MNPs) as concentration elements. In the protocol, the aptamers were first immobilized onto the surface of AuNPs and MNPs, respectively. Then, S. typhimurium were added into the above solution and incubated for 45 min. During the incubation, aptamer on the surface of nanoparticles could specifically bind to the target and form a MNPs-aptamer-S. typhimurium-aptamer-AuNPs sandwich structure complex. In a magnetic field, the formed complexes were easily separated from the solution, resulting in a fading of the AuNPs suspension and a decrease of the ultraviolet visible (UV/Vis) signal. The assay shows a linear response toward S. typhimurium concentration through a range of 25 to 10(5) cfu/mL, and the detection limit was improved to 10 cfu/mL. The applicability of the bioassay in real food samples was also investigated; the results were consistent with the experimental results obtained from plate-counting methods. It is believed that the developed aptasensor will broaden the application in bioassays.
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Affiliation(s)
- Nuo Duan
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University
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45
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Pei X, Huang H, Chen Y, Li C, Liu F, Li N. Modulating fluorescence anisotropy of dye-labeled DNA without involving mass amplification. Talanta 2016; 154:567-73. [DOI: 10.1016/j.talanta.2016.01.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 01/05/2016] [Accepted: 01/08/2016] [Indexed: 11/25/2022]
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46
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Exonuclease III-assisted graphene oxide amplified fluorescence anisotropy strategy for ricin detection. Biosens Bioelectron 2016; 85:822-827. [PMID: 27295569 DOI: 10.1016/j.bios.2016.05.091] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 05/23/2016] [Accepted: 05/30/2016] [Indexed: 11/23/2022]
Abstract
Graphene oxide (GO) is an excellent fluorescence anisotropy (FA) amplifier. However, in the conventional GO amplified FA strategy, one target can only induce the FA change of one fluorophore on probe, which limits the detection sensitivity. Herein, we developed an exonuclease III (Exo III) aided GO amplified FA strategy by using aptamer as an recognition element and ricin B-chain as a proof-of-concept target. The aptamer was hybridized with a blocker sequence and linked onto the surface of magnetic beads (MBs). Upon the addition of ricin B-chain, blocker was released from the surface of MBs and hybridized with the dye-modified probe DNA on the surface of GO through the toehold-mediated strand exchange reaction. The formed blocker-probe DNA duplex triggered the Exo III-assisted cyclic signal amplification by repeating the hybridization and digestion of probe DNA, liberating the fluorophore with several nucleotides (low FA value). Thus, ricin B-chain could be sensitively detected by the significantly decreased FA. The linear range was from 1.0μg/mL to 13.3μg/mL and the limit of detection (LOD) was 400ng/mL. This method improved the sensitivity of FA assay and it could be generalized to any kind of target detection based on the use of an appropriate aptamer.
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Qian J, Wang K, Wang C, Hua M, Yang Z, Liu Q, Mao H, Wang K. A FRET-based ratiometric fluorescent aptasensor for rapid and onsite visual detection of ochratoxin A. Analyst 2016; 140:7434-42. [PMID: 26396995 DOI: 10.1039/c5an01403d] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A color change observable by the naked eye to indicate the content of an analyte is considered to be the most conceivable way of various sensing protocols. By taking advantage of the Förster resonance energy transfer (FRET) principles, we herein designed a dual-emission ratiometric fluorescent aptasensor for ochratoxin A (OTA) detection via a dual mode of fluorescent sensing and onsite visual screening. Amino group-modified OTA's aptamer was firstly labeled with the green-emitting CdTe quantum dots (gQDs) donor. The red-emitting CdTe QDs (rQDs) which were wrapped in the silica sphere could serve as the reference signal, while the gold nanoparticle (AuNP) acceptors were attached on the silica surface to bind with the thiolated complementary DNA (cDNA). The hybridization reaction between the aptamer and the cDNA brought gQD-AuNP pair close enough, thereby making the FRET occur in the aptasensor fabrication, while the subsequent fluorescence recovery induced by OTA was obtained in the detection procedure. Based on the red background of the wrapped rQDs, the aptasensor in response to increasing OTA displayed a distinguishable color change from red to yellow-green, which could be conveniently readout in solution even by the naked eye. Since the bioconjugations used as the aptasensor can be produced at large scale, this method can be used for in situ, rapid, or high-throughput OTA detection after only an incubation step in a homogeneous mode. We believe that this novel aptasensing strategy provides not only a promising method for OTA detection but also a universal model for detecting diverse targets by changing the corresponding aptamer.
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Affiliation(s)
- Jing Qian
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
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Perrier S, Bouilloud P, De Oliveira Coelho G, Henry M, Peyrin E. Small molecule aptamer assays based on fluorescence anisotropy signal-enhancer oligonucleotides. Biosens Bioelectron 2016; 82:155-61. [PMID: 27085946 DOI: 10.1016/j.bios.2016.04.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 03/23/2016] [Accepted: 04/04/2016] [Indexed: 12/24/2022]
Abstract
Herein, we design novel fluorescence anisotropy (FA) aptamer sensing platforms dedicated to small molecule detection. The assay strategy relied on enhanced fluctuations of segmental motion dynamics of the aptamer tracer mediated by an unlabelled, partially complementary oligonucleotide. The signal-enhancer oligonucleotide (SEO) essentially served as a free probe fraction revealer. By targeting specific regions of the signalling functional nucleic acid, the SEO binding to the unbound aptamer triggered perturbations of both the internal DNA flexibility and the localized dye environment upon the free probe to duplex structure transition. This potentiating effect determined increased FA variations between the duplex and target bound states of the aptameric probe. FA assay responses were obtained with both pre-structured (adenosine) and unstructured (tyrosinamide) aptamers and with dyes of different photochemical properties (fluorescein and texas red). The multiplexed analysis ability was further demonstrated through the simultaneous multicolour detection of the two small targets. The FA method appears to be especially simple, sensitive and widely applicable.
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Affiliation(s)
- Sandrine Perrier
- Département de Pharmacochimie Moléculaire, Université Grenoble Alpes, UMR 5063 CNRS, ICMG FR 2607, Campus universitaire, Saint-Martin d'Hères, France
| | - Prisca Bouilloud
- Département de Pharmacochimie Moléculaire, Université Grenoble Alpes, UMR 5063 CNRS, ICMG FR 2607, Campus universitaire, Saint-Martin d'Hères, France
| | - Gisella De Oliveira Coelho
- Département de Pharmacochimie Moléculaire, Université Grenoble Alpes, UMR 5063 CNRS, ICMG FR 2607, Campus universitaire, Saint-Martin d'Hères, France
| | - Mickael Henry
- Département de Pharmacochimie Moléculaire, Université Grenoble Alpes, UMR 5063 CNRS, ICMG FR 2607, Campus universitaire, Saint-Martin d'Hères, France
| | - Eric Peyrin
- Département de Pharmacochimie Moléculaire, Université Grenoble Alpes, UMR 5063 CNRS, ICMG FR 2607, Campus universitaire, Saint-Martin d'Hères, France.
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Ma DL, Wang W, Mao Z, Kang TS, Han QB, Chan PWH, Leung CH. Utilization of G-Quadruplex-Forming Aptamers for the Construction of Luminescence Sensing Platforms. Chempluschem 2016; 82:8-17. [DOI: 10.1002/cplu.201600036] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 03/07/2016] [Indexed: 01/01/2023]
Affiliation(s)
- Dik-Lung Ma
- Department of Chemistry; Hong Kong Baptist University; 224 Waterloo Road, Kowloon Tong Hong Kong 852 P. R. China
| | - Wanhe Wang
- Department of Chemistry; Hong Kong Baptist University; 224 Waterloo Road, Kowloon Tong Hong Kong 852 P. R. China
| | - Zhifeng Mao
- Department of Chemistry; Hong Kong Baptist University; 224 Waterloo Road, Kowloon Tong Hong Kong 852 P. R. China
| | - Tian-Shu Kang
- State Key Laboratory of Quality Research in Chinese Medicine; Institute of Chinese Medical Sciences; University of Macau; Macao 999078 P. R. China
| | - Quan-Bin Han
- School of Chinese Medicine; Hong Kong Baptist University; Kowloon Hong Kong 852 P. R. China
| | - Philip Wai Hong Chan
- School of Chemistry; Monash University; Clayton VIC 3800 Australia
- Department of Chemistry; University of Warwick; Coventry CV4 7AL United Kingdom
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine; Institute of Chinese Medical Sciences; University of Macau; Macao 999078 P. R. China
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Du K, Yang M, Zhang Q, Dan S. Highly Porous Polymer Monolith Immobilized with Aptamer (RNA) Anchored Grafted Tentacles and Its Potential for the Purification of Lysozyme. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b02793] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Kaifeng Du
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Min Yang
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Qi Zhang
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Shunmin Dan
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
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