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Qin G, Wei Y, Zhou Q, Wang H, Wei Y, Lao S, Luo L, Mo R, Chen Y, Yang Y, He J, Li H. A sensitive MnO 2 nanosheet sensing platform based on a fluorescence aptamer sensor for the detection of zearalenone. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:4872-4878. [PMID: 36416138 DOI: 10.1039/d2ay01589g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
An aptamer sensor based on manganese dioxide (MnO2) nanosheets was developed for the detection of zearalenone (ZEN). The ZEN aptamer was modified at the 5'-end by a 6-carboxyfluorescein (6-FAM) fluorophore with self-assembly on MnO2 nanosheets. Interaction of the 6-FAM fluorophore at the 5'-end of the ZEN aptamer with the MnO2 nanosheet lowered fluorescence (FL) intensity due to fluorescence resonance energy transfer (FRET). The introduction of ZEN into the sensing system resulted in hybridization with the ZEN aptamer, forming a stable G-quadruplex/ZEN, which exhibited a low affinity for the MnO2 nanosheet surface. The distance between the 6-FAM fluorophore and MnO2 nanosheet hampered FRET, with a consequent strong FL signal. Under the optimal experimental conditions, the FL intensity of the sensing system showed a good linear correlation with ZEN concentration in the range of 1.5-10.0 ng mL-1, and a detection limit (S/N = 3) of 0.68 ng mL-1. The sensing system delivered enhanced specificity for the detection of ZEN, and can find wide application in the detection of other toxins by replacing the sequence of the recognition aptamer.
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Affiliation(s)
- Guoxin Qin
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Yuanwen Wei
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Qifeng Zhou
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Haijun Wang
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Yuning Wei
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Shuibing Lao
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Lihong Luo
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Renfu Mo
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Yongxian Chen
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Yuxia Yang
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Jie He
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
| | - Huiling Li
- Institute for Agricultural Product Quality Safety and Testing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
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Wei L, Wang Z, Chen Y. Optical Biosensor for Ochratoxin A Detection in Grains Using an Enzyme-Mediated Click Reaction and Polystyrene Nanoparticles. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:14798-14804. [PMID: 36372964 DOI: 10.1021/acs.jafc.2c05137] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Herein, we develop an optical biosensor for highly sensitive and facile detection of ochratoxin A (OTA) using an enzyme-mediated click reaction for signal amplification and polystyrene nanoparticles (PNPs) for signal readout. Alkaline phosphatase was employed to hydrolyze the ascorbic acid-phosphate to generate ascorbic acid, which reduces Cu(II) to Cu(I). Cu(I) can catalyze the click reaction between alkyne-functionalized magnetic beads and azide-functionalized PNPs to form complexes, while unbound PNPs acted as the signal probe. This strategy utilized the high efficiency of click chemistry and the inherent optical absorption properties of PNPs, which effectively improved the sensitivity of conventional immunoassays and simplified the procedures using magnetic separation technology. This optical biosensor enabled OTA detection in a linear range of 0.1 to 50 ng/mL with a detection limit of 54 pg/mL. Moreover, it has been successfully challenged with OTA detection in maize samples, revealing its potential as a promising tool for mycotoxin screening.
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Affiliation(s)
- Luyu Wei
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Zhilong Wang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Yiping Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, Guangdong, China
- Shenzhen Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, Guangdong, China
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3
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Wang L, Zhou H, Yan K, Xu P, Di B, Hu C, Su M. Using dual exonucleases to finely distinguish structural adjustment of aptamers for small-molecule detection. RSC Adv 2021; 11:32898-32903. [PMID: 35493548 PMCID: PMC9042303 DOI: 10.1039/d1ra05551h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 09/25/2021] [Indexed: 12/04/2022] Open
Abstract
The binding of small molecules to their DNA aptamers can modulate their susceptibility to digestion by exonucleases, however, absolute differentiation between digestion and inhibition has never been reported. Here, we show that the digestion of aptamers by T7 exonuclease can be completely inhibited upon binding of small-molecule targets and exploit this finding for the first time to achieve sensitive, label-free small-molecule detection. We use a quinine-binding aptamer to show that target binding entirely halts T7 exonuclease digestion, leaving behind an intact double-stranded product that retains strong target affinity. On the contrary, digestion of nontarget-bound aptamer produces a single-stranded product incapable of target binding. Exonuclease I efficiently eliminates these single-stranded products but is unable to digest the target-bound double-stranded product. The remaining products can be fluorescently quantified with SYBR Gold to determine target concentrations, giving a limit of detection of 100 nM with the linear range from 0 to 8 μM. We demonstrate the first example of a dual-exonuclease-mediated approach capable of producing a concentration-dependent response in terms of aptamer digestion modules, therefore improving performance of the current aptamer-based assay for small-molecule detection. Dual exonucleases to finely distinguish structural adjustment of aptamers to produce absolute differentiation between digestion and inhibition.![]()
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Affiliation(s)
- Lancheng Wang
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University Nanjing 211198 P. R. China
| | - Huimin Zhou
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University Nanjing 211198 P. R. China
| | - Kun Yan
- Department of Pharmaceutical Analysis, School of Pharmacy, China Pharmaceutical University Nanjing 211198 P. R. China
| | - Peng Xu
- Key Laboratory of Drug Monitoring and Control, Drug Intelligence and Forensic Center, Ministry of Public Security No. 18 Dongbeiwang West Road Beijing 100193 P. R. China
| | - Bin Di
- Department of Pharmaceutical Analysis, School of Pharmacy, China Pharmaceutical University Nanjing 211198 P. R. China
| | - Chi Hu
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University Nanjing 211198 P. R. China
| | - Mengxiang Su
- Department of Pharmaceutical Analysis, School of Pharmacy, China Pharmaceutical University Nanjing 211198 P. R. China
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Hu JJ, Dong X, Jiang W, Xia F, Lou X. Multifunctional aggregates for precise cellular analysis. Sci China Chem 2021. [DOI: 10.1007/s11426-021-1051-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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5
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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: 27] [Impact Index Per Article: 6.8] [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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Bai Y, Shu T, Su L, Zhang X. Functional nucleic acid-based fluorescence polarization/anisotropy biosensors for detection of biomarkers. Anal Bioanal Chem 2020; 412:6655-6665. [PMID: 32601896 DOI: 10.1007/s00216-020-02754-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 05/27/2020] [Accepted: 06/03/2020] [Indexed: 01/03/2023]
Abstract
The sensitive and selective detection of biomarkers plays a crucial role in disease diagnostics, drug discovery, and early screening of cancers. The achievement of this goal highly depends on the continuous development of biosensing technologies. Among them, fluorescence anisotropy/polarization (FA/FP) analysis receives increasing interest due to the advantage of simple operation, fast response, and no background interference. In recent decades, great progress has been achieved in FA/FP sensors thanks to the development of functional nucleic acids (FNAs) including aptamers and nucleic acid enzymes. This review focuses on FNA-based FA/FP sensors for the quantitative detection of biomarkers, such as nucleic acid, small molecules, and proteins. The design strategies, recognition elements, and practical applications are fully highlighted. The article also discusses the challenges of applying FNA-based FA/FP sensors in the next generation and the potential solutions along with future prospects. Graphical abstract.
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Affiliation(s)
- Yunlong Bai
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Tong Shu
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China. .,Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, 510640, Guangdong, China.
| | - Lei Su
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xueji Zhang
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China. .,School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, Guangdong, China.
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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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Chen J, Liu J, Chen X, Qiu H. Recent progress in nanomaterial-enhanced fluorescence polarization/anisotropy sensors. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.06.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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9
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Abdel-Haleem FM, Zahran EM. Miniaturization overcomes macro sample analysis limitations: Salicylate-selective polystyrene nanoparticle-modified optical sensor. Talanta 2019; 196:436-441. [PMID: 30683389 DOI: 10.1016/j.talanta.2018.12.073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/21/2018] [Accepted: 12/24/2018] [Indexed: 11/29/2022]
Abstract
Salicylate-selective polystyrene micro-optode is engineered using a mixed solvent method. The size of the particles (200-400 nm) and the distribution of the recognition components onto their surface were elucidated by transmission electron microscope and confocal fluorescence microscope. The polystyrene micro/nanoparticles are modified with thiourea derivative as ionophore, ETH 7075 as chromoionophore, and tridodecylmethyl ammonium chloride (TDMAC) as ion-exchanger. The response mechanism depends on the selective binding of the ionophore at the surface of the particles to salicylate. A concomitant protonation of the chromoionophore results in a decrease in the absorbance at the maximum wavelength, 535 nm. Enabling this sensing interaction at the micro-scale decreases the response time of the optode to be lower than 10 s the concentration range of 3-70 µM, with a detection limit of 2.1 μM. This microsphere sensing platform demonstrated excellent performance in the determination of salicylate in spiked urine samples and in pharmaceutical formulations. Further miniaturization of these micro-optodes promises in-vivo analysis of intracellular analytes.
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Affiliation(s)
- Fatehy M Abdel-Haleem
- Chemistry Department, Faculty of Science, Cairo University, Gamma street, Giza 12613, Egypt.
| | - Elsayed M Zahran
- Department of Chemistry, Ball State University, Muncie, IN 47306, USA.
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10
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Wang X, Xu M, Huang K, Lou X, Xia F. AIEgens/Nucleic Acid Nanostructures for Bioanalytical Applications. Chem Asian J 2019; 14:689-699. [PMID: 30489015 DOI: 10.1002/asia.201801595] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 11/29/2018] [Indexed: 12/27/2022]
Abstract
DNA occupies significant roles in life processes, which include encoding the sequences of proteins and accurately transferring genetic information from generation to generation. Recent discoveries have demonstrated that a variety of biological functions are correlated with DNA's conformational transitions. The non-B form has attained great attention among the diverse forms of DNA over the past several years. The main reason for this is that a large number of studies have shown that the non-B form of DNA is associated with gross deletions, inversions, duplications, translocations as well as simple repeating sequences, which therefore causes human diseases. Consequently, the conformational transition of DNA between the B-form and the non-B form is important for biology. Conventional fluorescence probes based on the conformational transitions of DNA usually need a fluorophore and a quencher group, which suffers from the complex design of the structure and tedious synthetic procedures. Moreover, conventional fluorescence probes are subject to the aggregation-caused quenching (ACQ) effect, which limits their application toward imaging and analyte detection. Fluorogens exhibiting aggregation-induced emission (AIE) have attracted tremendous attention over the past decade. By taking advantage of this unique behavior, plenty of fluorescent switch-on probes without the incorporation of fluorescent quenchers/fluorophore pairs have been widely developed as biosensors for imaging a variety of analytes. Herein, the recent progress in bioanalytical applications on the basis of aggregation-induced emission luminogens (AIEgens)/nucleic acid nanostructures are presented and discussed.
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Affiliation(s)
- Xudong Wang
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Min Xu
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China
| | - Kaixun Huang
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Xiaoding Lou
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China
| | - Fan Xia
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.,Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China
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11
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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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12
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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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13
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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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14
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Yan M, Bai W, Zhu C, Huang Y, Yan J, Chen A. Design of nuclease-based target recycling signal amplification in aptasensors. Biosens Bioelectron 2015; 77:613-23. [PMID: 26485175 DOI: 10.1016/j.bios.2015.10.015] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 09/21/2015] [Accepted: 10/05/2015] [Indexed: 10/22/2022]
Abstract
Compared with conventional antibody-based immunoassay methods, aptasensors based on nucleic acid aptamer have made at least two significant breakthroughs. One is that aptamers are more easily used for developing various simple and rapid homogeneous detection methods by "sample in signal out" without multi-step washing. The other is that aptamers are more easily employed for developing highly sensitive detection methods by using various nucleic acid-based signal amplification approaches. As many substances playing regulatory roles in physiology or pathology exist at an extremely low concentration and many chemical contaminants occur in trace amounts in food or environment, aptasensors for signal amplification contribute greatly to detection of such targets. Among the signal amplification approaches in highly sensitive aptasensors, the nuclease-based target recycling signal amplification has recently become a research focus because it shows easy design, simple operation, and rapid reaction and can be easily developed for homogenous assay. In this review, we summarized recent advances in the development of various nuclease-based target recycling signal amplification with the aim to provide a general guide for the design of aptamer-based ultrasensitive biosensing assays.
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Affiliation(s)
- Mengmeng Yan
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Science, Beijing 100081, China; Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing 100081, China
| | - Wenhui Bai
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Science, Beijing 100081, China; Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing 100081, China
| | - Chao Zhu
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Science, Beijing 100081, China; Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing 100081, China
| | - Yafei Huang
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Science, Beijing 100081, China; Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing 100081, China; College of Food Science and Technology, Hainan University, Haikou 570228, China
| | - Jiao Yan
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Science, Beijing 100081, China; Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing 100081, China; College of Food Science and Technology, Hainan University, Haikou 570228, China
| | - Ailiang Chen
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Science, Beijing 100081, China; Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing 100081, China.
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15
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Huang Y, Liu X, Huang H, Qin J, Zhang L, Zhao S, Chen ZF, Liang H. Attomolar detection of proteins via cascade strand-displacement amplification and polystyrene nanoparticle enhancement in fluorescence polarization aptasensors. Anal Chem 2015; 87:8107-14. [PMID: 26169378 DOI: 10.1021/ac5041692] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Extremely sensitive and accurate measurements of protein markers for early detection and monitoring of diseases pose a formidable challenge. Herein, we develop a new type of amplified fluorescence polarization (FP) aptasensor based on allostery-triggered cascade strand-displacement amplification (CSDA) and polystyrene nanoparticle (PS NP) enhancement for ultrasensitive detection of proteins. The assay system consists of a fluorescent dye-labeled aptamer hairpin probe and a PS NP-modified DNA duplex (assistant DNA/trigger DNA duplex) probe with a single-stranded part and DNA polymerase. Two probes coexist stably in the absence of target, and the dye exhibits relatively low FP background. Upon recognition and binding with a target protein, the stem of the aptamer hairpin probe is opened, after which the opened hairpin probe hybridizes with the single-stranded part in the PS NP-modified DNA duplex probe and triggers the CSDA reaction through the polymerase-catalyzed recycling of both target protein and trigger DNA. Throughout this CSDA process, numerous massive dyes are assembled onto PS NPs, which results in a substantial FP increase that provides a readout signal for the amplified sensing process. Our newly proposed amplified FP aptasensor enables the quantitative measurement of proteins with the detection limit in attomolar range, which is about 6 orders of magnitude lower than that of traditional homogeneous aptasensors. Moreover, this sensing method also exhibits high specificity for target proteins and can be performed in homogeneous solutions. In addition, the suitability of this method for the quantification of target protein in biological samples has also been shown. Considering these distinct advantages, the proposed sensing method can be expected to provide an ultrasensitive platform for the analysis of various types of target molecules.
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Affiliation(s)
- Yong Huang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), College of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, China
| | - Xiaoqian Liu
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), College of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, China
| | - Huakui Huang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), College of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, China
| | - Jian Qin
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), College of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, China
| | - Liangliang Zhang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), College of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, China
| | - Shulin Zhao
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), College of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, China
| | - Zhen-Feng Chen
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), College of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, China
| | - Hong Liang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), College of Chemistry and Pharmacy, Guangxi Normal University, Guilin 541004, China
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