1
|
Li Y, Zhang D, Zeng X, Liu C, Wu Y, Fu C. Advances in Aptamer-Based Biosensors for the Detection of Foodborne Mycotoxins. Molecules 2024; 29:3974. [PMID: 39203052 PMCID: PMC11356850 DOI: 10.3390/molecules29163974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 08/14/2024] [Accepted: 08/16/2024] [Indexed: 09/03/2024] Open
Abstract
Foodborne mycotoxins (FBMTs) are toxins produced by food itself or during processing and transportation that pose an enormous threat to public health security. However, traditional instrumental and chemical methods for detecting toxins have shortcomings, such as high operational difficulty, time consumption, and high cost, that limit their large-scale applications. In recent years, aptamer-based biosensors have become a new tool for food safety risk assessment and monitoring due to their high affinity, good specificity, and fast response. In this review, we focus on the progress of single-mode and dual-mode aptasensors in basic research and device applications over recent years. Furthermore, we also point out some problems in the current detection strategies, with the aim of stimulating future toxin detection systems for a transition toward ease of operation and rapid detection.
Collapse
Affiliation(s)
- Yangyang Li
- Chongqing Key Laboratory for New Chemical Materials of Shale Gas, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, China
| | - Dan Zhang
- School of Cable Engineering, Henan Institute of Technology, Xinxiang 453003, China
| | - Xiaoyuan Zeng
- Chongqing Key Laboratory for New Chemical Materials of Shale Gas, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, China
| | - Cheng Liu
- Chongqing Key Laboratory for New Chemical Materials of Shale Gas, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, China
| | - Yan Wu
- Chongqing Key Laboratory for New Chemical Materials of Shale Gas, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, China
| | - Cuicui Fu
- Chongqing Key Laboratory for New Chemical Materials of Shale Gas, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, China
| |
Collapse
|
2
|
Elashnikov R, Khrystonko O, Trelin A, Kuchař M, Švorčík V, Lyutakov O. Label-free SERS-ML detection of cocaine trace in human blood plasma. JOURNAL OF HAZARDOUS MATERIALS 2024; 472:134525. [PMID: 38743978 DOI: 10.1016/j.jhazmat.2024.134525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/22/2024] [Accepted: 05/01/2024] [Indexed: 05/16/2024]
Abstract
The widespread consumption of cocaine poses a significant threat to modern society. The most effective way to combat this problem is to control the distribution of cocaine, based on its accurate and sensitive detection. Here, we proposed the detection of cocaine in human blood plasma using a combination of surface enhanced Raman spectroscopy and machine learning (SERS-ML). To demonstrate the efficacy of our proposed approach, cocaine was added into blood plasma at various concentrations and drop-deposited onto a specially prepared disposable SERS substrate. SERS substrates were created by deposition of metal nanoclusters on electrospun polymer nanofibers. Subsequently, SERS spectra were measured and as could be expected, the manual distinguishing of cocaine from the spectra proved unfeasible, as its signal was masked by the background signal from blood plasma molecules. To overcome this issue, a database of SERS spectra of cocaine in blood plasma was collected and used for ML training and validation. After training, the reliability of proposed approach was tested on independently prepared samples, with unknown for SERS-ML cocaine presence or absence. As a result, the possibility of rapid determination of cocaine in blood plasma with a probability above 99.5% for cocaine concentrations up to 10-14 M was confirmed. Therefore, it is evident that the proposed approach has the ability to detect trace amounts of cocaine in bioliquids in an express and simple manner.
Collapse
Affiliation(s)
- Roman Elashnikov
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Olena Khrystonko
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Andrii Trelin
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Martin Kuchař
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, Prague, Czech Republic
| | - Václav Švorčík
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
| | - Oleksiy Lyutakov
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic.
| |
Collapse
|
3
|
Li P, Luo C, Chen X, Huang C. A novel "off-on" ratiometric fluorescent aptasensor for adenosine detection based on FRET between quantum dots and graphene oxide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 305:123557. [PMID: 37866265 DOI: 10.1016/j.saa.2023.123557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 09/30/2023] [Accepted: 10/16/2023] [Indexed: 10/24/2023]
Abstract
A novel "off-on" ratiometric fluorescent aptasensor was established for adenosine detection based on fluorescence resonance energy transfer (FRET) between CdS QDs, DNA QDs as donor and graphene oxide (GO) as acceptor. Amino-riched DNA QDs covalently bonded to the carboxyl group on the edge of the GO, and with the absorption of the TGA-modified CdS QDs with aptamer (CdS QDs-apt) onto the GO surface via the π-π stacking interaction. The fluorescence of both CdS QDs and DNA QDs were efficiently quenched due to FRET (turn off). When adenosine was present, the specific binding of the aptamer to the target preferentially that released the CdS QDs-apt from GO. The process would inhibit the FRET which contribute to the fluorescence of CdS QDs-apt recovery again (turn on), while the fluorescence intensity of DNA QDs only slightly altered and acted as the reference signal. Thus, a novel "off-on" ratiometric fluorescent aptasensor for adenosine detection was constructed accordingly. There was a good linearity relationship between the ratio of the FL intensity (F595 nm/F464 nm) and the concentration of adenosine in the range of 20.00-180.0 nmol/L with a detection limit of 1.3 nmol/L (S/N = 3, n = 9). Importantly, the feasibility of the developed aptasensor for selective detection of adenosine in serum and urine samples with satisfactory results. The recoveries were observed to be 97.04-100.2 %.
Collapse
Affiliation(s)
- Pu Li
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China
| | - Chen Luo
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China
| | - Xiaoxiao Chen
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China
| | - Chaobiao Huang
- Xingzhi College, Zhejiang Normal University, Lanxi 321100, China; College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China.
| |
Collapse
|
4
|
Ilyas A, Dyussupova A, Sultangaziyev A, Shevchenko Y, Filchakova O, Bukasov R. SERS immuno- and apta-assays in biosensing/bio-detection: Performance comparison, clinical applications, challenges. Talanta 2023; 265:124818. [PMID: 37453393 DOI: 10.1016/j.talanta.2023.124818] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 06/09/2023] [Accepted: 06/12/2023] [Indexed: 07/18/2023]
Abstract
Surface Enhanced Raman Spectroscopy is increasingly used as a sensitive bioanalytical tool for detection of variety of analytes ranging from viruses and bacteria to cancer biomarkers and toxins, etc. This comprehensive review describes principles of operation and compares the performance of immunoassays and aptamer assays with Surface Enhanced Raman scattering (SERS) detection to each other and to some other bioassay methods, including ELISA and fluorescence assays. Both immuno- and aptamer-based assays are categorized into assay on solid substrates, assays with magnetic nanoparticles and assays in laminar flow or/and strip assays. The best performing and recent examples of assays in each category are described in the text and illustrated in the figures. The average performance, particularly, limit of detection (LOD) for each of those methods reflected in 9 tables of the manuscript and average LODs are calculated and compared. We found out that, on average, there is some advantage in terms of LOD for SERS immunoassays (0.5 pM median LOD of 88 papers) vs SERS aptamer-based assays (1.7 pM median LOD of 51 papers). We also tabulated and analyzed the clinical performance of SERS immune and aptamer assays, where selectivity, specificity, and accuracy are reported, we summarized the best examples. We also reviewed challenges to SERS bioassay performance and real-life application, including non-specific protein binding, nanoparticle aggregation, limited nanotag stability, sometimes, relatively long time to results, etc. The proposed solutions to those challenges are also discussed in the review. Overall, this review may be interesting not only to bioanalytical chemist, but to medical and life science researchers who are interested in improvement of bioanalyte detection and diagnostics.
Collapse
Affiliation(s)
- Aisha Ilyas
- Department of Chemistry, SSH, Nazarbayev University, Astana, Kazakhstan
| | | | | | - Yegor Shevchenko
- Department of Chemistry, SSH, Nazarbayev University, Astana, Kazakhstan
| | - Olena Filchakova
- Department of Biology, SSH, Nazarbayev University, Astana, Kazakhstan
| | - Rostislav Bukasov
- Department of Chemistry, SSH, Nazarbayev University, Astana, Kazakhstan.
| |
Collapse
|
5
|
Ren Y, Cao L, Zhang X, Jiao R, Ou D, Wang Y, Zhang D, Shen Y, Ling N, Ye Y. A novel fluorescence resonance energy transfer (FRET)-based paper sensor with smartphone for quantitative detection of Vibrio parahaemolyticus. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
6
|
Fan J, Tang Y, Yang W, Yu Y. Disposable multiplexed electrochemical sensors based on electro-triggered selective immobilization of probes for simultaneous detection of DNA and proteins. J Mater Chem B 2021; 8:7501-7510. [PMID: 32672323 DOI: 10.1039/d0tb01532f] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Electrically addressable covalent immobilization of probes on a multiplexed electrode for the simultaneous detection of multiple targets within the same sample is often regarded as a difficult milestone to be achieved. Herein, we demonstrated a reagentless disposable multiplexed electrochemical DNA and aptamer-based sensing platform for the simultaneous determination of various targets. The electrochemically triggered "click" chemistry was developed, and three biomarkers, including p53, thrombin, and VEGF165 were used as model analytes. The proposed sensor consisted of three independent screen-printed carbon electrodes (SPCE), with an alkyne-azide cycloaddition reaction that was activated selectively by means of electrical triggering, so that different DNA probes can be modified on the desired electrode units in sequence. In terms of simultaneous detection, the sensor was able to quantify the DNA target of p53 with a detection limit of 0.35 nM, whereas the limits of detection for protein quantification of thrombin and VEGF165 were 0.22 nM and 0.014 nM, respectively. The proposed sensor not only showed encouraging reproducibility and stability, but also performed well even in 50% serum samples. Therefore, the work described here offers a general strategy for developing a multiplexed sensor with promising potential to achieve rapid, simple and cost-effective analysis of biological samples.
Collapse
Affiliation(s)
- Jinlong Fan
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, P. R. China.
| | | | | | | |
Collapse
|
7
|
Yao S, Zhao C, Shang M, Li J, Wang J. Enzyme-free and label-free detection of Staphylococcus aureus based on target-inhibited fluorescence signal recovery. Food Chem Toxicol 2021; 150:112071. [PMID: 33609594 DOI: 10.1016/j.fct.2021.112071] [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: 12/11/2020] [Revised: 02/07/2021] [Accepted: 02/14/2021] [Indexed: 12/30/2022]
Abstract
In this work, a one-step fluorometric strategy based on nanometal surface energy transfer (NSET) between carbon dots (CDs) and gold nanoparticles (AuNPs) was developed for facile detection of Staphylococcus aureus (S. aureus). The fluorescence of CDs was quenched up to 63.5% by AuNPs due to nucleic acid hybridization in the presence of linker DNA, which contained the complementary sequences of S. aureus-specific aptamer, and the fluorescence signal was in the "off" state. Upon aptamer addition, the CDs was released from linker DNA through the strong competitiveness of aptamer, leading to the notable fluorescence recovered. Once S. aureus is introduced, aptamer preferentially bind to the bacterial surface and cannot hybridize with complementary sequences in the linker DNA, resulting in the fluorescence signal with "off" state. Based on these findings, the performance and reliability of the fluorescence-based assay were evaluated. Compared to direct hybridization of complementary DNA on the surface of CDs and AuNPs, our sensing strategy has enhanced detection limit (10 cfu⋅mL-1) and improved linear range (10 to 106 cfu⋅mL-1) for S. aureus. Therefore, our proposed enzyme-free and label-free strategy may become a promising method for ease of operation, sensitive and selective S. aureus detection.
Collapse
Affiliation(s)
- Shuo Yao
- School of Public Health, Jilin University, Changchun, 130021, China
| | - Chao Zhao
- School of Public Health, Jilin University, Changchun, 130021, China
| | - Mingyu Shang
- College of Earth Sciences, Jilin University, Changchun, 130021, China.
| | - Juan Li
- School of Public Health, Jilin University, Changchun, 130021, China.
| | - Juan Wang
- School of Public Health, Jilin University, Changchun, 130021, China.
| |
Collapse
|
8
|
Li D, Liu L, Huang Q, Tong T, Zhou Y, Li Z, Bai Q, Liang H, Chen L. Recent advances on aptamer-based biosensors for detection of pathogenic bacteria. World J Microbiol Biotechnol 2021; 37:45. [PMID: 33554321 DOI: 10.1007/s11274-021-03002-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 01/08/2021] [Indexed: 01/10/2023]
Abstract
As a significant constituent in biosphere, bacteria have a great influence on human activity. The detection of pathogen bacteria is closely related to the human health. However, the traditional methods for detection of pathogenic bacteria are time-consuming and difficult for quantification, although they are practical and reliable. Therefore, novel strategies for rapid, sensitive, and cost-effective detection are in great demand. Aptamer is a kind of oligonucleotide that selected by repeated screening in vitro or systematic evolution of ligands by exponential enrichment (SELEX) technology. Over the past years, owing to high affinity and specificity of aptamers, a variety of aptamer-based biosensors have been designed and applied for pathogen detection. In this review, we have discussed the recent advances on the applications of aptamer-based biosensors in detection of pathogenic bacteria. In addition, we also point out some problems in current methods and look forward to the further development of aptamer-based biosensors for pathogen detection.
Collapse
Affiliation(s)
- Danliang Li
- Department of health inspection and quarantine, College of Public Health, University of South China, Hengyang, China.,Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine, Hengyang, China
| | - Luyao Liu
- Department of health inspection and quarantine, College of Public Health, University of South China, Hengyang, China.,Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine, Hengyang, China
| | - Qiaoling Huang
- Department of health inspection and quarantine, College of Public Health, University of South China, Hengyang, China.,Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine, Hengyang, China
| | - Ting Tong
- Department of health inspection and quarantine, College of Public Health, University of South China, Hengyang, China.,Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine, Hengyang, China
| | - You Zhou
- Department of health inspection and quarantine, College of Public Health, University of South China, Hengyang, China.,Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine, Hengyang, China
| | - Zhongyu Li
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang, China
| | - Qinqin Bai
- Department of health inspection and quarantine, College of Public Health, University of South China, Hengyang, China
| | - Hao Liang
- Department of health inspection and quarantine, College of Public Health, University of South China, Hengyang, China. .,Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine, Hengyang, China.
| | - Lili Chen
- Department of health inspection and quarantine, College of Public Health, University of South China, Hengyang, China. .,Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine, Hengyang, China. .,Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, Hunan, China.
| |
Collapse
|
9
|
A review of aptamer-based SERS biosensors: Design strategies and applications. Talanta 2021; 227:122188. [PMID: 33714469 DOI: 10.1016/j.talanta.2021.122188] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 01/27/2021] [Accepted: 01/30/2021] [Indexed: 02/07/2023]
Abstract
Surface-enhanced Raman spectroscopy, due to its high sensitivity, unique vibrational fingerprint identification of molecules and easy operation, has been extensively applied in different fields. Aptamers, being the unique single stranded DNA/RNA sequences that can specifically recognize and seize the target analytes, combined with Surface-enhanced Raman spectroscopy (SERS), can offer potent multiplex detection capacity with high specificity and sensitivity. In this review, we summarize and classify the general working strategies of different types of aptamer-based SERS biosensors with diversified protocols which either take aptamer conformational change as intrinsic reporter, or make use of various extrinsic Raman reporters in different sensor designs via on/off approach, sandwich-type and magnetic nanoparticles (NPs)-assisted approach, and catalytic reaction assisted approach with amplification of alternative Raman signals. The advantages, applications and perspectives of these aptamer-based SERS biosensors are also discussed.
Collapse
|
10
|
Xu Y, Kang Q, Yang B, Chen B, He M, Hu B. A nanoprobe based on molybdenum disulfide nanosheets and silver nanoclusters for imaging and quantification of intracellular adenosine triphosphate. Anal Chim Acta 2020; 1134:75-83. [PMID: 33059868 DOI: 10.1016/j.aca.2020.08.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/01/2020] [Accepted: 08/08/2020] [Indexed: 12/25/2022]
Abstract
Adenosine triphosphate (ATP), as a high-energy phosphate compound that stores and releases energy in living cells, has an irreplaceable role in many physiological processes and maintenance of biological functions, and can be used as an indicator of many diseases. In this work, a composite nanoprobe, silver nanocluster (AgNC) @ molybdenum disulfide (MoS2), was designed to achieve in situ fluorescence imaging and quantitative analysis of intracellular ATP in HeLa cells by fluorescence spectrometry and inductively coupled plasma mass spectrometry (ICP-MS). The probe was constructed based on the adsorption of DNA-AgNCs by MoS2 nanosheets, and the DNA-AgNCs were prepared with the ATP aptamer as a template, whose fluorescence was initially quenched by MoS2. When the probe was incubated into the cells, intracellular ATP recognized the aptamer sequence and caused the DNA-AgNCs to fall off the MoS2 nanosheets, resulting in fluorescence recovery. Here, AgNCs not only acted as a fluorescence label for imaging, but also as an element tag for quantitative analysis of intracellular ATP with the detection of 107Ag by ICP-MS. The ATP in HeLa cells detected by this method was 24.6 ± 1.7 nmol L-1, which was in good agreement with the test result of the ATP test kit (20.4 ± 0.8 nmol L-1). The proposed method has potential application in medical clinical diagnosis and evaluation of the body's metabolic level via fluorescence imaging and ICP-MS detection of intracellular ATP.
Collapse
Affiliation(s)
- Yan Xu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan, 430072, China
| | - Qi Kang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan, 430072, China
| | - Bin Yang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan, 430072, China
| | - Beibei Chen
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan, 430072, China
| | - Man He
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan, 430072, China
| | - Bin Hu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan, 430072, China.
| |
Collapse
|
11
|
Cui X, Song M, Liu Y, Yuan Y, Huang Q, Cao Y, Lu F. Identifying conformational changes of aptamer binding to theophylline: A combined biolayer interferometry, surface-enhanced Raman spectroscopy, and molecular dynamics study. Talanta 2020; 217:121073. [PMID: 32498900 DOI: 10.1016/j.talanta.2020.121073] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/14/2020] [Accepted: 04/20/2020] [Indexed: 11/20/2022]
Abstract
Theophylline is a potent bronchodilator for the treatment of asthma, bronchitis, and emphysema. Its narrow therapeutic window (20-100 μM) demands that the blood concentration of theophylline be monitored carefully, which can be achieved by aptamer capture. Thus, an understanding of what occurs when aptamers bind to theophylline is critical for identifying a high-affinity and high-specificity aptamer, which improve the sensitivity and selectivity of theophylline detection. Consequently, there is an urgent need to develop a simple, convenient, and nondestructive method to monitor conformational changes during the binding process. Here, we report the determination of the affinity of a selected aptamer and theophylline via biolayer interferometry (BLI) experiments. Additionally, using surface-enhanced Raman spectroscopy (SERS), the conformational changes on theophylline-aptamer binding were identified from differences in the SER spectra. Finally, molecular dynamics (MD) simulations were used to identify the specific conformational changes of the aptamer during the binding process. Such a combined BLI-SERS-MD method provides an in-depth understanding of the theophylline-aptamer binding processes and a comprehensive explanation for conformational changes, which helps to select, design, and modify an aptamer with high affinity and specificity. It can also be used as a scheme for the study of other aptamer-ligand interactions, which can be applied to the detection, sensing, clinical diagnosis, and treatment of diseases.
Collapse
Affiliation(s)
- Xiaolin Cui
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Menghua Song
- State Key Laboratory of Genetic Engineering, MOE Engineering Research Center of Gene Technology, School of Life Sciences, Fudan University, Shanghai, 200438, China
| | - Yan Liu
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Yifan Yuan
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China
| | - Qiang Huang
- State Key Laboratory of Genetic Engineering, MOE Engineering Research Center of Gene Technology, School of Life Sciences, Fudan University, Shanghai, 200438, China
| | - Yongbing Cao
- Institute of Vascular Disease, Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200082, China
| | - Feng Lu
- School of Pharmacy, Second Military Medical University, Shanghai, 200433, China; Shanghai Key Laboratory for Pharmaceutical Metabolite Research, Shanghai, 200433, China.
| |
Collapse
|
12
|
Shen R, Tan J, Yuan Q. Chemically Modified Aptamers in Biological Analysis. ACS APPLIED BIO MATERIALS 2020; 3:2816-2826. [DOI: 10.1021/acsabm.0c00062] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Ruichen Shen
- Institute of Chemical Biology and Nanomedicine (ICBN), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Jie Tan
- Institute of Chemical Biology and Nanomedicine (ICBN), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Quan Yuan
- Institute of Chemical Biology and Nanomedicine (ICBN), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| |
Collapse
|
13
|
Zhang B, Wei C. The sensitive detection of ATP and ADA based on turn-on fluorescent copper/silver nanoclusters. Anal Bioanal Chem 2020; 412:2529-2536. [PMID: 32043202 DOI: 10.1007/s00216-020-02476-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 01/27/2020] [Accepted: 01/31/2020] [Indexed: 11/25/2022]
Abstract
A simple turn-on fluorescence strategy is proposed for the detection of ATP based on DNA-stabilized copper/silver nanoclusters (DNA-Cu/Ag NCs). The fluorescence intensity of DNA-Cu/Ag NCs increases significantly in the presence of ATP, because the specific interaction between ATP and its aptamer causes two darkish Cu/Ag NCs to be situated at the 5' and 3' termini close to each other. A limit of detection (LOD) of 7.0 μM is found, in a linear range of 2-18 mM, and the proposed sensor is simple, sensitive, and selective. Additionally, the DNA-Cu/Ag NCs/ATP system is further developed into a sensor for ADA detection and demonstrates a linear response to ADA from 5 to 50 U/L with a LOD of 5 U/L. The proposed method is also shown to be successful in detecting ATP and ADA in a solution of fetal bovine serum.
Collapse
Affiliation(s)
- Baozhu Zhang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, Shanxi, China
- College of Chemistry and Chemical Engineering, Jinzhong University, Yuci, 030619, Shanxi, China
| | - Chunying Wei
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, Shanxi, China.
| |
Collapse
|
14
|
Sensitive surface-enhanced Raman scattering detection of atrazine based on aggregation of silver nanoparticles modified carbon dots. Talanta 2019; 201:46-51. [DOI: 10.1016/j.talanta.2019.03.108] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/27/2019] [Accepted: 03/30/2019] [Indexed: 02/06/2023]
|
15
|
Wu W, Yu C, Wang Q, Zhao F, He H, Liu C, Yang Q. Research advances of DNA aptasensors for foodborne pathogen detection. Crit Rev Food Sci Nutr 2019; 60:2353-2368. [PMID: 31298036 DOI: 10.1080/10408398.2019.1636763] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Aptamers, referring to single-stranded DNA or RNA molecules can specifically recognize and bind to their targets. Based on their excellent specificity, sensitivity, high affinity, and simplicity of modification, aptamers offer great potential for pathogen detection and biomolecular screening. This article reviews aptamer screening technologies and aptamer application technologies, including gold-nanoparticle lateral flow assays, fluorescence assays, electrochemical assays, colorimetric assays, and surface-enhanced Raman assays, in the detection of foodborne pathogens. Although notable progress (more rapid, sensitive, and accurate) has been achieved in the field, challenges and drawbacks in their applications still remain to be overcome.
Collapse
Affiliation(s)
- Wei Wu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China.,State Key Laboratory of Bio-fibers and Eco-textiles, Institute of Biochemical Engineering, School of Materials Science and Engineering, Qingdao University, Qingdao, China
| | - Chundi Yu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Qi Wang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Fangyuan Zhao
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Hong He
- Clinical Laboratory, Affiliated Hospital to Qingdao University, Qingdao, China
| | - Chunzhao Liu
- State Key Laboratory of Bio-fibers and Eco-textiles, Institute of Biochemical Engineering, School of Materials Science and Engineering, Qingdao University, Qingdao, China.,State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Qingli Yang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
| |
Collapse
|
16
|
Fang Q, Li Y, Miao X, Zhang Y, Yan J, Yu T, Liu J. Sensitive detection of antibiotics using aptamer conformation cooperated enzyme-assisted SERS technology. Analyst 2019; 144:3649-3658. [PMID: 31074470 DOI: 10.1039/c9an00190e] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Serious healthcare concerns have been raised on the issue of antibiotic residues after overuse, especially by accumulation in the human body through food webs. Here, we report a methodological development for sensitive detection of antibiotics with aptamer conformation cooperated enzyme-assisted SERS (ACCESS) technology. We design and integrate a set of nucleic acid oligos, realizing specific recognition of chloramphenicol (CAP) and efficient exonuclease III-assisted DNA amplification. It features a "signal-on" analysis of CAP with the limit of detection (15 fM), the lowest concentration detectable in the literature. Our method exhibits a high selectivity on the target analyte, free of interference of other potential antibiotic contaminants. The ACCESS assay promises an ultrasensitive and specific detection tool for trace amounts of antibiotic residues in samples of our daily life.
Collapse
Affiliation(s)
- Qianqian Fang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Yingying Li
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Xinxing Miao
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Yiqiu Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Jun Yan
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Tainrong Yu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Jian Liu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| |
Collapse
|
17
|
Raman Spectroscopy and Aptamers for a Label-Free Approach: Diagnostic and Application Tools. JOURNAL OF HEALTHCARE ENGINEERING 2019; 2019:2815789. [PMID: 31183028 PMCID: PMC6512054 DOI: 10.1155/2019/2815789] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/10/2019] [Indexed: 01/04/2023]
Abstract
Raman spectroscopy is a powerful optical technique based on the inelastic scattering of incident light to assess the chemical composition of a sample, including biological ones. Medical diagnostic applications of Raman spectroscopy are constantly increasing to provide biochemical and structural information on several specimens, being not affected by water interference, and potentially avoiding the constraint of additional labelling procedures. New strategies have been recently developed to overcome some Raman limitations related, for instance, to the need to deal with an adequate quantity of the sample to perform a reliable analysis. In this regard, the use of metallic nanoparticles, the optimization of fiber optic probes, and other approaches can actually enhance the signal intensity compared to spontaneous Raman scattering. Moreover, to further increase the potential of this investigation technique, aptamers can be considered as a valuable means, being synthetic, short, single, or double-stranded oligonucleotides (RNAs or DNAs) that fold up into unique 3D structures to specifically bind to selected molecules, even at very low concentrations, and thus allowing an early diagnosis of a possible disease. Due to the paramount relevance of the topic, this review focuses on the main Raman spectroscopy techniques combined with aptamer arrays in the label-free mode, providing an overview on different applications to support healthcare management.
Collapse
|
18
|
Munzar JD, Ng A, Juncker D. Duplexed aptamers: history, design, theory, and application to biosensing. Chem Soc Rev 2019; 48:1390-1419. [PMID: 30707214 DOI: 10.1039/c8cs00880a] [Citation(s) in RCA: 127] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Nucleic acid aptamers are single stranded DNA or RNA sequences that specifically bind a cognate ligand. In addition to their widespread use as stand-alone affinity binding reagents in analytical chemistry, aptamers have been engineered into a variety of ligand-specific biosensors, termed aptasensors. One of the most common aptasensor formats is the duplexed aptamer (DA). As defined herein, DAs are aptasensors containing two nucleic acid elements coupled via Watson-Crick base pairing: (i) an aptamer sequence, which serves as a ligand-specific receptor, and (ii) an aptamer-complementary element (ACE), such as a short DNA oligonucleotide, which is designed to hybridize to the aptamer. The ACE competes with ligand binding, such that DAs generate a signal upon ligand-dependent ACE-aptamer dehybridization. DAs possess intrinsic advantages over other aptasensor designs. For example, DA biosensing designs generalize across DNA and RNA aptamers, DAs are compatible with many readout methods, and DAs are inherently tunable on the basis of nucleic acid hybridization. However, despite their utility and popularity, DAs have not been well defined in the literature, leading to confusion over the differences between DAs and other aptasensor formats. In this review, we introduce a framework for DAs based on ACEs, and use this framework to distinguish DAs from other aptasensor formats and to categorize cis- and trans-DA designs. We then explore the ligand binding dynamics and chemical properties that underpin DA systems, which fall under conformational selection and induced fit models, and which mirror classical SN1 and SN2 models of nucleophilic substitution reactions. We further review a variety of in vitro and in vivo applications of DAs in the chemical and biological sciences, including riboswitches and riboregulators. Finally, we present future directions of DAs as ligand-responsive nucleic acids. Owing to their tractability, versatility and ease of engineering, DA biosensors bear a great potential for the development of new applications and technologies in fields ranging from analytical chemistry and mechanistic modeling to medicine and synthetic biology.
Collapse
Affiliation(s)
- Jeffrey D Munzar
- McGill University and Genome Quebec Innovation Centre, Montreal, Quebec, Canada.
| | | | | |
Collapse
|
19
|
Zhou Y, Wu Y, Pokholenko O, Papper V, Marks RS, Steele TWJ. Design and optimisation of Photochrome Aptamer Switch Assay (PHASA). Anal Chim Acta 2019; 1061:134-141. [PMID: 30926032 DOI: 10.1016/j.aca.2019.01.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 01/10/2019] [Accepted: 01/24/2019] [Indexed: 02/07/2023]
Abstract
Photochrome Aptamer Switch Assay (PHASA) is our unique and recently developed fluorescent biosensing platform that exploits the combination of aptamer adaptive binding and photoisomerisation kinetics of stilbenes. The PHASA is based on converting any suitable stilbene-ligand-aptamer complex into a reversible biosensor. Binding affinity, aptamer concentration, and stilbene molecular structure determine the PHASA performance criteria. Consequently, understanding of the structure-activity relationship of the stilbene-ligand conjugate is extremely important when predicting and optimising the biosensor sensitivity. In the present manuscript, new analytical methods relating to calculation of the limit of detection (LOD) of the PHASA are proposed and discussed. Using these methods, it is possible to optimise the independent or dependent physicochemical parameters of the stilbene-ligand conjugates and evaluate their general sensing performance. The proposed analytical methods are based on the inter-dependent relationships between the sensitivity and the range of analyte detection and provide starting conditions for known aptamer binding constants in various PHASA applications.
Collapse
Affiliation(s)
- Yubin Zhou
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; Department of Physiology and Immunology Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117456, Singapore
| | - Yuanyuan Wu
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Oleksandr Pokholenko
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | | | - Robert S Marks
- Department of Biotechnology Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev, P.O. Box 653, Be'er-Sheva, 84105, Israel
| | - Terry W J Steele
- School of Materials Science & Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
| |
Collapse
|
20
|
Colorimetric adenosine aptasensor based on DNA cycling amplification and salt-induced aggregation of gold nanoparticles. Mikrochim Acta 2018; 185:488. [PMID: 30280258 DOI: 10.1007/s00604-018-3031-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 09/27/2018] [Indexed: 12/12/2022]
Abstract
An aptamer based assay is described for the colorimetric detection of adenosine. The presence of adenosine triggers the deformation of hairpin DNA oligonucleotide (HP1) containing adenosine aptamer and then hybridizes another unlabeled hairpin DNA oligonucleotide (HP2). This leads to the formation of a double strand with a blunt 3' terminal. After exonuclease III (Exo III)-assisted degradation, the guanine-rich strand (GRS) is released from HP2. Hence, the adenosine-HP1 complex is released to the solution where it can hybridize another HP2 and initiate many cycles of the digestion reaction with the assistance of Exo III. This leads to the generation of a large number of GRS strands after multiple cycles. The GRS stabilize the red AuNPs against aggregation in the presence of potassium ions. If, however, GRS forms a G-quadruplex, it loses its ability to protect gold nanoparticles (AuNPs) from salt-induced AuNP aggregation. Therefore, the color of the solution changes from red to blue which can be visually observed. This colorimetric assay has a 0.13 nM detection limit and a wide linear range that extends from 5 nM to 1 μM. Graphical abstract Schematic presentation of a colorimetric aptamer biosensor for adenosine detection based on DNA cycling amplification and salt-induced aggregation of gold nanoparticles.
Collapse
|
21
|
Szlag VM, Rodriguez RS, He J, Hudson-Smith N, Kang H, Le N, Reineke TM, Haynes CL. Molecular Affinity Agents for Intrinsic Surface-Enhanced Raman Scattering (SERS) Sensors. ACS APPLIED MATERIALS & INTERFACES 2018; 10:31825-31844. [PMID: 30134102 DOI: 10.1021/acsami.8b10303] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Research at the interface of synthetic materials, biochemistry, and analytical techniques has enabled sensing platforms for applications across many research communities. Herein we review the materials used as affinity agents to create surface-enhanced Raman spectroscopy (SERS) sensors. Our scope includes those affinity agents (antibody, aptamer, small molecule, and polymer) that facilitate the intrinsic detection of targets relevant to biology, medicine, national security, environmental protection, and food safety. We begin with an overview of the analytical technique (SERS) and considerations for its application as a sensor. We subsequently describe four classes of affinity agents, giving a brief overview on affinity, production, attachment chemistry, and first uses with SERS. Additionally, we review the SERS features of the affinity agents, and the analytes detected by intrinsic SERS with that affinity agent class. We conclude with remarks on affinity agent selection for intrinsic SERS sensing platforms.
Collapse
Affiliation(s)
- Victoria M Szlag
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Rebeca S Rodriguez
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Jiayi He
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Natalie Hudson-Smith
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Hyunho Kang
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Ngoc Le
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Theresa M Reineke
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Christy L Haynes
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| |
Collapse
|
22
|
Sundin EM, Ciubuc JD, Bennet KE, Ochoa K, Manciu FS. Comparative Computational and Experimental Detection of Adenosine Using Ultrasensitive Surface-Enhanced Raman Spectroscopy. SENSORS (BASEL, SWITZERLAND) 2018; 18:E2696. [PMID: 30115871 PMCID: PMC6111885 DOI: 10.3390/s18082696] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/11/2018] [Accepted: 08/14/2018] [Indexed: 01/30/2023]
Abstract
To better understand detection and monitoring of the important neurotransmitter adenosine at physiological levels, this study combines quantum chemical density functional modeling and ultrasensitive surface-enhanced Raman spectroscopic (SERS) measurements. Combined simulation results and experimental data for an analyte concentration of about 10-11 molar indicate the presence of all known molecular forms resulting from adenosine's complex redox-reaction. Detailed analysis presented here, besides assessing potential Raman signatures of these adenosinic forms, also sheds light on the analytic redox process and voltammetric detection. Examples of adenosine Raman fingerprints for different molecular orientations with respect to the SERS substrate are the vibrational line around 920 ± 10 cm-1 for analyte physisorption through the carbinol moiety and around 1600 ± 20 cm-1 for its fully oxidized form. However, both hydroxyl/oxygen sites and NH₂/nitrogen sites contribute to molecule's interaction with the SERS environment. Our results also reveal that contributions of partially oxidized adenosine forms and of the standard form are more likely to be detected with the first recorded voltammetric oxidation peak. The fully oxidized adenosine form contributes mostly to the second peak. Thus, this comparative theoretical⁻experimental investigation of adenosine's vibrational signatures provides significant insights for advancing its detection, and for future development of opto-voltammetric biosensors.
Collapse
Affiliation(s)
- Emma M Sundin
- Department of Physics, University of Texas at El Paso, El Paso, TX 79968, USA.
- Department of Biomedical Engineering, University of Texas at El Paso, El Paso, TX 79968, USA.
| | - John D Ciubuc
- Department of Physics, University of Texas at El Paso, El Paso, TX 79968, USA.
- Department of Biomedical Engineering, University of Texas at El Paso, El Paso, TX 79968, USA.
| | - Kevin E Bennet
- Division of Engineering, Department of Neurologic Surgery, Mayo Clinic, Rochester, MN 55905, USA.
| | - Katia Ochoa
- Department of Physics, University of Texas at El Paso, El Paso, TX 79968, USA.
| | - Felicia S Manciu
- Department of Physics, University of Texas at El Paso, El Paso, TX 79968, USA.
- Department of Biomedical Engineering, University of Texas at El Paso, El Paso, TX 79968, USA.
- Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX 79968, USA.
| |
Collapse
|
23
|
Villa JEL, Pasquini C, Poppi RJ. Surface-enhanced Raman spectroscopy and MCR-ALS for the selective sensing of urinary adenosine on filter paper. Talanta 2018; 187:99-105. [PMID: 29853071 DOI: 10.1016/j.talanta.2018.05.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 05/02/2018] [Accepted: 05/05/2018] [Indexed: 11/27/2022]
Abstract
Adenosine is a purine nucleoside that is present in all human cells and is essential for regulating certain physiological activities in tissues and organs. Since adenosine is considered to be a potential cancer biomarker in urine, its determination may be crucial for the early diagnosis and non-invasive monitoring of cancer. Herein, we present a label-free method to quantify urinary adenosine using surface-enhanced Raman spectroscopy (SERS) and multivariate curve resolution-alternating least squares (MCR-ALS). Ring-oven preconcentration and direct deposition of monodisperse gold nanoparticles on filter paper were employed to improve the sampling efficiency. Further, MCR-ALS (assessed with and without a correlation constraint), the standard addition method and pH controls were combined to compensate for the matrix effect and to address overlapping bands in the analysis of human urine samples. As a result, the proposed method showed to be sensitive (LOD varying between 3.8 and 4.9 µmol L-1, S/R = 3), reproducible (RSD less than ± 15%), and selective over other nucleosides (guanosine, cytidine, thymidine and uridine) and unknown interferences (second-order advantage). This is the first report of a SERS-chemometric method applied to urinary adenosine sensing at physiologically relevant concentrations, with minimal sample preparation, and has strong potential to be a valuable tool in cancer research.
Collapse
Affiliation(s)
- Javier E L Villa
- Institute of Chemistry, University of Campinas, P. O. Box 6154, 13081-970 Campinas, SP, Brazil
| | - Celio Pasquini
- Institute of Chemistry, University of Campinas, P. O. Box 6154, 13081-970 Campinas, SP, Brazil
| | - Ronei J Poppi
- Institute of Chemistry, University of Campinas, P. O. Box 6154, 13081-970 Campinas, SP, Brazil.
| |
Collapse
|
24
|
Tip-enhanced Raman scattering of DNA aptamers for Listeria monocytogenes. Biointerphases 2018; 13:03C402. [PMID: 29724106 DOI: 10.1116/1.5022303] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Optical detection and conformational mapping of aptamers are important for improving medical and biosensing technologies and for better understanding of biological processes at the molecular level. The authors investigate the vibrational signals of deoxyribonucleic acid aptamers specific to Listeria monocytogenes immobilized on gold substrates using tip-enhanced Raman scattering (TERS) spectroscopy and nanoscale imaging. The authors compare topographic and nano-optical signals and investigate the fluctuations of the position-dependent TERS spectra. They perform spatial TERS mapping with 3 nm step size and discuss the limitation of the resulting spatial resolution under the ambient conditions. TERS mapping provides information about the chemical composition and conformation of aptamers and paves the way to future label-free biosensing.
Collapse
|
25
|
Cui L, Lu M, Li Y, Tang B, Zhang CY. A reusable ratiometric electrochemical biosensor on the basis of the binding of methylene blue to DNA with alternating AT base sequence for sensitive detection of adenosine. Biosens Bioelectron 2017; 102:87-93. [PMID: 29127900 DOI: 10.1016/j.bios.2017.11.025] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 11/02/2017] [Accepted: 11/05/2017] [Indexed: 12/13/2022]
Abstract
We develop a reusable ratiometric electrochemical biosensor on the basis of the binding of methylene blue (MB) to DNA with alternating AT base sequence for sensitive detection of adenosine. We design a strand 1 with MB-modified thymine (T) base in the proximal 3' termini as the capture probe for its immobilization on the gold electrode and a 3' termini ferrocene (Fc)-modified aptamer for the recognition of adenosine. The hybridization of strand 1 with the aptamer leads to the formation of a double-stranded DNA (dsDNA) and consequently the away of MB from the electrode surface and the close of Fc to the electrode surface, generating a small value of IMB/IFc (IMB and IFc are the peak currents of MB and Fc, respectively). In the presence of adenosine, its binding with the aptamer induces the release of Fc from the electrode surface and the close of MB to the electrode surface, generating a large value of IMB/IFc. As a result, adenosine may be accurately quantified by the measurement of ratiometric signal (IMB/IFc). This ratiometric electrochemical biosensor can be simply fabricated and exhibits high sensitivity with a limit of detection of as low as 90.8pM and a large dynamic range from 0.1nM to 100μM. Moreover, this biosensor demonstrates good performance with excellent selectivity, regeneration capability, high reliability and good reproducibility, and may become a universal platform for the detection of various biomolecules which can be recognized by aptamers, holding great potential for further applications in biomedical research and clinical diagnosis.
Collapse
Affiliation(s)
- Lin Cui
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, PR China
| | - Mengfei Lu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, PR China
| | - Ying Li
- School of Medicine, Health Science Center,Shenzhen University, Shenzhen 518060, PR China
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, PR China.
| | - Chun-Yang Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, PR China.
| |
Collapse
|
26
|
Kim JY, Park JH, Kim MI, Lee HH, Kim HL, Jeong KS, Moon SO, Kang PW, Park KW, Lee YH, Chun BW. Identification of female-specific blood stains using a 17β-estradiol-targeted aptamer-based sensor. Int J Legal Med 2017; 132:91-98. [PMID: 29086052 DOI: 10.1007/s00414-017-1718-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 10/11/2017] [Indexed: 01/08/2023]
Abstract
Blood stain evidence obtained from a violent crime scene provides decisive clues that can enable a case to be solved through forensic analyses such as genetic identification. However, collected samples usually contain a mixture of biological material from different sources, making genetic identification difficult. To address this issue, we developed an activatable aptamer sensor targeting 17β-estradiol for detection of female-specific blood in mixed samples. With the sensor, we were able to detect blood originating from females using a variable light source (495 nm). The sensor was especially sensitive to blood from young females (10-40 years) but not to blood from older females (≥ 50 years). Genomic DNA was extracted from the female blood specimens identified by this method and used for quantification and short tandem repeat genotyping. We confirmed that there was no fluorescence interference from the aptamer sensor. These results indicate that this novel aptamer sensor can be used to analyze evidentiary blood samples and thereby facilitate subsequent genetic identification.
Collapse
Affiliation(s)
- Joo-Young Kim
- Crime-scene DNA Section, National Forensic Service, Gwangju Institute, Gwangju, 57231, Republic of Korea
| | - Jung-Hyun Park
- Mibyeong Research Center, Korea Institute of Oriental Medicine, Daejeon, 34054, Republic of Korea
| | - Man Il Kim
- Crime-scene DNA Section, National Forensic Service, Gwangju Institute, Gwangju, 57231, Republic of Korea
| | - Hye Hyeon Lee
- Crime-scene DNA Section, National Forensic Service, Gwangju Institute, Gwangju, 57231, Republic of Korea
| | - Hye Lim Kim
- Crime-scene DNA Section, National Forensic Service, Gwangju Institute, Gwangju, 57231, Republic of Korea
| | - Kyu-Sik Jeong
- Forensic DNA Division, National Forensic Service, Wonju, 26460, Republic of Korea
| | - Sang-Ok Moon
- Crime-scene DNA Section, National Forensic Service, Gwangju Institute, Gwangju, 57231, Republic of Korea
| | - Pil-Won Kang
- Crime-scene DNA Section, National Forensic Service, Gwangju Institute, Gwangju, 57231, Republic of Korea
| | - Ki-Won Park
- Forensic DNA Division, National Forensic Service, Wonju, 26460, Republic of Korea
| | - Yang-Han Lee
- Forensic DNA Division, National Forensic Service, Wonju, 26460, Republic of Korea
| | - Byung-Won Chun
- Forensic DNA Division, National Forensic Service, Wonju, 26460, Republic of Korea.
| |
Collapse
|
27
|
Ahn JK, Kim HY, Baek S, Park HG. A new s-adenosylhomocysteine hydrolase-linked method for adenosine detection based on DNA-templated fluorescent Cu/Ag nanoclusters. Biosens Bioelectron 2017; 93:330-334. [DOI: 10.1016/j.bios.2016.08.058] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 08/09/2016] [Accepted: 08/18/2016] [Indexed: 01/26/2023]
|
28
|
Ma DL, Wu C, Dong ZZ, Tam WS, Wong SW, Yang C, Li G, Leung CH. The Development of G-Quadruplex-Based Assays for the Detection of Small Molecules and Toxic Substances. Chem Asian J 2017; 12:1851-1860. [PMID: 28470784 DOI: 10.1002/asia.201700533] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Indexed: 11/12/2022]
Abstract
G-Quadruplexes can be induced to form guanine-rich DNA sequences by certain small molecules or metal ions. In concert with an appropriate signal transducer, such as a fluorescent dye or a phosphorescent metal complex, the ligand-recognition event can be transduced into a luminescent response. This focus review aims to highlight recent examples of aptamer-based and metal-mediated G-quadruplex assays for the detection of small molecules and toxic substances in the last three years. We discuss the mechanisms and features of the different assays and present an outlook and a perspective for the future of this field.
Collapse
Affiliation(s)
- Dik-Lung Ma
- Department of Chemistry, Faculty of Science, Hong Kong Baptist University
| | - Chun Wu
- Department of Chemistry, Faculty of Science, Hong Kong Baptist University
| | - Zhen-Zhen Dong
- Department of Chemistry, Faculty of Science, Hong Kong Baptist University
| | - Wing-Sze Tam
- Department of Chemistry, Faculty of Science, Hong Kong Baptist University
| | - Sze-Wan Wong
- Department of Chemistry, Faculty of Science, Hong Kong Baptist University
| | - Chao Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau
| | - Guodong Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau
| |
Collapse
|
29
|
Graphene oxide wrapped Fe3O4@Au nanostructures as substrates for aptamer-based detection of Vibrio parahaemolyticus by surface-enhanced Raman spectroscopy. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2298-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
30
|
Wu Y, Xiao F, Wu Z, Yu R. Novel Aptasensor Platform Based on Ratiometric Surface-Enhanced Raman Spectroscopy. Anal Chem 2017; 89:2852-2858. [DOI: 10.1021/acs.analchem.6b04010] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yan Wu
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, China
| | - Fubing Xiao
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, China
| | - Zhaoyang Wu
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, China
| | - Ruqin Yu
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, China
| |
Collapse
|
31
|
Chen X, Chen S, Hu T, Ma Q. Fluorescent aptasensor for adenosine based on the use of quaternary CuInZnS quantum dots and gold nanoparticles. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2128-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
32
|
Shen J, Wang H, Li C, Zhao Y, Yu X, Luo X. Label-free electrochemical aptasensor for adenosine detection based on cascade signal amplification strategy. Biosens Bioelectron 2016; 90:356-362. [PMID: 27940239 DOI: 10.1016/j.bios.2016.12.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 11/21/2016] [Accepted: 12/04/2016] [Indexed: 12/19/2022]
Abstract
In this work, a simple and highly sensitive label-free electrochemical aptasensor for adenosine detection was developed based on target-aptamer binding triggered nicking endonuclease-assisted strand-replacement DNA polymerization and rolling circle amplification (RCA) strategy. The magnetic beads (MB) probe, which was attached the aptamer of adenosine and mDNA, was firstly fabricated. In the presence of adenosine, mDNA was released from MB upon recognition of the aptamer to target adenosine. The released mDNA as the primer activated autonomous DNA polymerization/nicking process and accompanied by the continuous release of replicated DNA fragments. Subsequently, numerous released DNA fragments were captured on the working electrode, and then as initiators to trigger the downstream RCA process leading to the formation of a long ssDNA concatemer for loading large amounts of Ru(NH3)63+. Therefore, a conspicuously amplified electrochemical signal through the developed dual-amplification strategy could be achieved. This method exhibited a high sensitivity toward adenosine with a detection limit of 0.032nM. Also, it exhibited high selectivity to different nucleoside families and good reproducibility. This design opens new horizons for integrating different disciplines, presenting a versatile tool for ultrasensitive detecting organic small molecules in medical research and clinical diagnosis.
Collapse
Affiliation(s)
- Jing Shen
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao, Shandong 266042, China
| | - Hongyang Wang
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao, Shandong 266042, China
| | - Chunxiang Li
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao, Shandong 266042, China.
| | - Yanyan Zhao
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao, Shandong 266042, China
| | - Xijuan Yu
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao, Shandong 266042, China
| | - Xiliang Luo
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao, Shandong 266042, China.
| |
Collapse
|
33
|
|
34
|
Lu L, Zhong HJ, He B, Leung CH, Ma DL. Development of a luminescent G-quadruplex-selective iridium(III) complex for the label-free detection of adenosine. Sci Rep 2016; 6:19368. [PMID: 26778273 PMCID: PMC4726048 DOI: 10.1038/srep19368] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 10/14/2015] [Indexed: 01/25/2023] Open
Abstract
A panel of six luminescent iridium(III) complexes were synthesized and evaluated for their ability to act as G-quadruplex-selective probes. The novel iridium(III) complex 1 was found to be highly selective for G-quadruplex DNA, and was employed for the construction of a label-free G-quadruplex-based adenosine detection assay in aqueous solution. Two different detection strategies were investigated for adenosine detection, and the results showed that initial addition of adenosine to the adenosine aptamer gave superior results. The assay exhibited a linear response for adenosine in the concentration range of 5 to 120 μM (R(2) = 0.992), and the limit of detection for adenosine was 5 μM. Moreover, this assay was highly selective for adenosine over other nucleosides, and exhibited potential use for biological sample analysis.
Collapse
Affiliation(s)
- Lihua Lu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Hai-Jing Zhong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Bingyong He
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
- Partner State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong, China
| |
Collapse
|
35
|
Hashemian Z, Khayamian T, Saraji M, Shirani MP. Aptasensor based on fluorescence resonance energy transfer for the analysis of adenosine in urine samples of lung cancer patients. Biosens Bioelectron 2015; 79:334-40. [PMID: 26722763 DOI: 10.1016/j.bios.2015.12.028] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Revised: 12/12/2015] [Accepted: 12/13/2015] [Indexed: 12/21/2022]
Abstract
A new aptasensor was designed for the analysis of adenosine based on fluorescence resonance energy transfer (FRET) between CdS quantum dot (QDs) as a donor and polypyrrole (Ppy) as an acceptor. The QDs were covalently bonded to anti-adenosine aptamer where its fluorescence was quenched by Ppy. When Ppy was replaced by adenosine, the fluorescence of QDs was restored and its intensity was proportional to the adenosine concentration. Under the optimized conditions, a linear range was found to be 23-146 nM with a detection limit of 9.3 nM. The method was used for analysis of adenosine in urine samples of lung cancer patients and its accuracy was evaluated by comparison of the results of the proposed method with the standard method of HPLC-UV. Furthermore, the interactions of adenosine molecules with the aptamer were investigated using molecular modeling, including molecular dynamic simulations (MDS). The results demonstrated that each G-quadruplex aptamer can capture two adenosine molecules.
Collapse
Affiliation(s)
- Zahra Hashemian
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Taghi Khayamian
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Mohammad Saraji
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | | |
Collapse
|
36
|
Huang H, Shi S, Gao X, Gao R, Zhu Y, Wu X, Zang R, Yao T. A universal label-free fluorescent aptasensor based on Ru complex and quantum dots for adenosine, dopamine and 17β-estradiol detection. Biosens Bioelectron 2015; 79:198-204. [PMID: 26708240 DOI: 10.1016/j.bios.2015.12.024] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 12/10/2015] [Accepted: 12/12/2015] [Indexed: 12/16/2022]
Abstract
Based on specific aptamer binding properties, a strategy for adenosine, dopamine and 17β-estradiol detection was realised by employing Ru complex and quantum dots (QDs) as fluorescence probes. Ru complex, which could quench the fluorescence of QDs, preferred to bind with aptamer DNA and resulted in the fluorescence rise of QDs. When the aptamer DNA was incubated with the target first, it could not bind with Ru complex and the fluorescence of QDs was quenched. Under the optimal condition, the fluorescence intensity was linearly proportional to the concentration of adenosine, dopamine and 17β-estradiol with a limit of detection (LOD) of 101 nM, 19 nM and 37 nM, respectively. The experiments in fetal bovine serum were also carried out with good results. This universal method was rapid, label-free, low-cost, easy-operating and highly repeatable for the detection of adenosine, dopamine and 17β-estradiol. Qualitative detection by naked eyes was also available without complex instruments. It could also be extended to detect various analytes, such as metal ions, proteins and small molecules by using appropriate aptamers.
Collapse
Affiliation(s)
- Hailiang Huang
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Shuo Shi
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China.
| | - Xing Gao
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Ruru Gao
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Ying Zhu
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Xuewen Wu
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Ruimin Zang
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Tianming Yao
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China.
| |
Collapse
|
37
|
Duan N, Chang B, Zhang H, Wang Z, Wu S. Salmonella typhimurium detection using a surface-enhanced Raman scattering-based aptasensor. Int J Food Microbiol 2015; 218:38-43. [PMID: 26599860 DOI: 10.1016/j.ijfoodmicro.2015.11.006] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 10/19/2015] [Accepted: 11/14/2015] [Indexed: 12/21/2022]
Abstract
Surface-enhanced Raman spectroscopy (SERS) has been used in a variety of biological applications due to its high sensitivity and specificity. Here, we report a SERS-based aptasensor approach for quantitative detection of pathogenic bacteria. A SERS substrate bearing Au@Ag core/shell nanoparticles (NPs) is functionalized with aptamer 1 (apt 1) for the capture of target molecules. X-rhodamine (ROX)-modified aptamer 2 (apt 2) is used as recognition element and Raman reporter. Salmonella typhimurium specifically interacted with the aptamers to form Au@Ag-apt 1-target-apt 2-ROX sandwich-like complexes. As a result, the concentration of S. typhimurium was determined using this developed aptasensor structure, and a calibration curve is obtained in the range of 15 to 1.5 × 10(6) cfu/mL with a limit of detection of 15 cfu/mL. Our method was successfully applied to real food samples, and the results are consistent with the results obtained using plate counting methods. We believe that the developed method shows potential for the rapid and sensitive detection of pathogenic bacteria in food safety assurance.
Collapse
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, Wuxi 214122, China
| | - Boya Chang
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Hui Zhang
- China Rural Technology Development Center, Beijing 100045, China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Shijia Wu
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| |
Collapse
|
38
|
Wu T, Xu T, Ma Z. Sensitive electrochemical detection of copper ions based on the copper(II) ion assisted etching of Au@Ag nanoparticles. Analyst 2015; 140:8041-7. [PMID: 26501137 DOI: 10.1039/c5an01888a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A new sensitive electrochemical sensor for the detection of copper ions based on the copper ion assisted etching of Au@Ag nanoparticles was developed in this work. Since copper ions could greatly catalyze the etching process of the silver shell of Au@Ag nanoparticles in the presence of thiosulfate solutions, leading to an obvious decrease of the linear sweep voltammetry (LSV) signals of silver, the concentration of the copper ions, therefore, can be measured. Under the optimized conditions, the electrochemical sensor exhibited excellent sensitivity and selectivity for Cu(2+), with wide linear ranges of 1 nM to 100 μM, and the detection limit of 0.3 nM. In addition, this method was successfully applied for the analysis of Cu(2+) in river water and exhibited good analytical performance.
Collapse
Affiliation(s)
- Tianxiang Wu
- Department of Chemistry, Capital Normal University, Beijing, 100048, China.
| | | | | |
Collapse
|
39
|
Qiu H, Huo Y, Li Z, Zhang C, Chen P, Jiang S, Xu S, Ma Y, Wang S, Li H. Surface-Enhanced Raman Scattering Based on Controllable-Layer Graphene Shells Directly Synthesized on Cu Nanoparticles for Molecular Detection. Chemphyschem 2015; 16:2953-60. [DOI: 10.1002/cphc.201500502] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 06/15/2015] [Indexed: 11/11/2022]
|
40
|
Zhao H, Wang YS, Tang X, Zhou B, Xue JH, Liu H, Liu SD, Cao JX, Li MH, Chen SH. An enzyme-free strategy for ultrasensitive detection of adenosine using a multipurpose aptamer probe and malachite green. Anal Chim Acta 2015; 887:179-185. [PMID: 26320800 DOI: 10.1016/j.aca.2015.05.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 05/14/2015] [Accepted: 05/20/2015] [Indexed: 12/31/2022]
Abstract
We report on an enzyme-free and label-free strategy for the ultrasensitive determination of adenosine. A novel multipurpose adenosine aptamer (MAAP) is designed, which serves as an effective target recognition probe and a capture probe for malachite green. In the presence of adenosine, the conformation of the MAAP is converted from a hairpin structure to a G-quadruplex. Upon addition of malachite green into this solution, a noticeable enhancement of resonance light scattering was observed. The signal response is directly proportional to the concentration of adenosine ranging from 75 pM to 2.2 nM with a detection limit of 23 pM, which was 100-10,000 folds lower than those obtained by previous reported methods. Moreover, this strategy has been applied successfully for detecting adenosine in human urine and blood samples, further proving its reliability. The mechanism of adenosine inducing MAAP to form a G-quadruplex was demonstrated by a series of control experiments. Such a MAAP probe can also be used to other strategies such as fluorescence or spectrophotometric ones. We suppose that this strategy can be expanded to develop a universal analytical platform for various target molecules in the biomedical field and clinical diagnosis.
Collapse
Affiliation(s)
- Hui Zhao
- College of Public Health, University of South China, Hengyang, 421001, PR China
| | - Yong-Sheng Wang
- College of Public Health, University of South China, Hengyang, 421001, PR China.
| | - Xian Tang
- College of Public Health, University of South China, Hengyang, 421001, PR China
| | - Bin Zhou
- College of Public Health, University of South China, Hengyang, 421001, PR China
| | - Jin-Hua Xue
- College of Public Health, University of South China, Hengyang, 421001, PR China
| | - Hui Liu
- College of Public Health, University of South China, Hengyang, 421001, PR China
| | - Shan-Du Liu
- College of Public Health, University of South China, Hengyang, 421001, PR China
| | - Jin-Xiu Cao
- College of Public Health, University of South China, Hengyang, 421001, PR China
| | - Ming-Hui Li
- College of Public Health, University of South China, Hengyang, 421001, PR China
| | - Si-Han Chen
- College of Public Health, University of South China, Hengyang, 421001, PR China
| |
Collapse
|
41
|
Pang S, Labuza TP, He L. Development of a single aptamer-based surface enhanced Raman scattering method for rapid detection of multiple pesticides. Analyst 2015; 139:1895-901. [PMID: 24551875 DOI: 10.1039/c3an02263c] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The objective of this study was to develop a simple and rapid method that could detect and discriminate four specific pesticides (isocarbophos, omethoate, phorate, and profenofos) using a single aptamer-based capture procedure followed by Surface Enhanced Raman Spectroscopy (SERS). The aptamer is a single stranded DNA sequence that is specific to capture these four pesticides. The thiolated aptamer was conjugated onto silver (Ag) dendrites, a nanostructure that can enhance the Raman fingerprint of pesticides, through Ag-thiol bonds. It was then backfilled with 6-mercaptohexanol (MH) to prevent nonspecific binding. The modified SERS platform [Ag-(Ap + MH)] was then mixed with each pesticide solution (P) for 20 min. After capturing the pesticides, the Ag-(Ap + MH)-P complex was analyzed under a DXR Raman microscope and TQ Analyst software. The results show that the four pesticides can be captured and detected using principal component analysis based on their distinct fingerprint Raman peaks. The limits of detection (LODs) of isocarbophos, omethoate, phorate, and profenofos were 3.4 μM (1 ppm), 24 μM (5 ppm), 0.4 μM (0.1 ppm), and 14 μM (5 ppm) respectively. This method was also validated successfully in apple juice. These results demonstrated the super capacity of aptamer-based SERS in rapid detection and discrimination of multi-pesticides. This technique can be extended to detect a wide range of pesticides using specific aptamers.
Collapse
Affiliation(s)
- Shintaro Pang
- Department of Food Science, University of Massachusetts, Amherst, MA, USA.
| | | | | |
Collapse
|
42
|
Bai Y, Feng F, Zhao L, Chen Z, Wang H, Duan Y. A turn-on fluorescent aptasensor for adenosine detection based on split aptamers and graphene oxide. Analyst 2015; 139:1843-6. [PMID: 24608985 DOI: 10.1039/c4an00084f] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A simple, sensitive and selective turn-on fluorescent aptasensor for adenosine detection was developed based on target-induced split aptamer fragment conjunction and different interactions of graphene oxide and the two states of the designed aptamer sequences.
Collapse
Affiliation(s)
- Yunfeng Bai
- School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, P. R. China.
| | | | | | | | | | | |
Collapse
|
43
|
Chen SH, Wang YS, Chen YS, Tang X, Cao JX, Li MH, Wang XF, Zhu YF, Huang YQ. Dual-channel detection of metallothioneins and mercury based on a mercury-mediated aptamer beacon using thymidine-mercury-thymidine complex as a quencher. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 151:315-321. [PMID: 26143324 DOI: 10.1016/j.saa.2015.06.106] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 06/26/2015] [Accepted: 06/28/2015] [Indexed: 06/04/2023]
Abstract
A novel dual-channel strategy for the detection of metallothioneins (MTs) and Hg(2+) has been developed based on a mercury-mediated aptamer beacon (MAB) using thymidine-mercury-thymidine complex as a quencher for the first time. In the presence of Hg(2+), the T-rich oligonucleotide with a 6-carboxyfluorescein (TRO-FAM) can form an aptamer beacon via the formation of T-Hg(2+)-T base pairs, which results in a fluorescence quenching of the sensing system owing to the fluorescence resonance energy transfer (FRET) from the fluorophore of FAM to the terminated T-Hg(2+)-T base pair. The addition of MTs into this solution leads to the disruption of the T-Hg(2+)-T complex, resulting in an increase of the fluorescent signal of the system. In the optimizing condition, ΔF was directly proportional to the concentrations ranging from 5.63 nM to 0.275 μM for MTs, and 14.2 nM to 0.30 μM for Hg(2+) with the detection limits of 1.69 nM and 4.28 nM, respectively. The proposed dual-channel method avoids the label steps of a quencher in common molecular beacon strategies, without tedious procedure or the requirement of sophisticated equipment, and is rapid, inexpensive and sensitive.
Collapse
Affiliation(s)
- Si-Han Chen
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Yong-Sheng Wang
- College of Public Health, University of South China, Hengyang 421001, PR China.
| | - Yun-Sheng Chen
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Xian Tang
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Jin-Xiu Cao
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Ming-Hui Li
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Xiao-Feng Wang
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Yu-Feng Zhu
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Yan-Qin Huang
- College of Public Health, University of South China, Hengyang 421001, PR China
| |
Collapse
|
44
|
Xu S, Man B, Jiang S, Wang J, Wei J, Xu S, Liu H, Gao S, Liu H, Li Z, Li H, Qiu H. Graphene/Cu nanoparticle hybrids fabricated by chemical vapor deposition as surface-enhanced Raman scattering substrate for label-free detection of adenosine. ACS APPLIED MATERIALS & INTERFACES 2015; 7:10977-87. [PMID: 25941901 DOI: 10.1021/acsami.5b02303] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We present a graphene/Cu nanoparticle hybrids (G/CuNPs) system as a surface-enhanced Raman scattering (SERS) substrate for adenosine detection. The Cu nanoparticles wrapped by a monolayer graphene shell were directly synthesized on flat quartz by chemical vapor deposition in a mixture of methane and hydrogen. The G/CuNPs showed an excellent SERS enhancement activity for adenosine. The minimum detected concentration of the adenosine in serum was demonstrated as low as 5 nM, and the calibration curve showed a good linear response from 5 to 500 nM. The capability of SERS detection of adenosine in real normal human urine samples based on G/CuNPs was also investigated and the characteristic peaks of adenosine were still recognizable. The reproducible and the ultrasensitive enhanced Raman signals could be due to the presence of an ultrathin graphene layer. The graphene shell was able to enrich and fix the adenosine molecules, which could also efficiently maintain chemical and optical stability of G/CuNPs. Based on the G/CuNPs system, the ultrasensitive SERS detection of adenosine in varied matrices was expected for the practical applications in medicine and biotechnology.
Collapse
Affiliation(s)
- Shicai Xu
- †College of Physics and Electronic Information, Shandong Provincial Key Laboratory of Functional Macromolecular Biophysics, Institute of Biophysics, Dezhou University, Dezhou 253023, China
| | - Baoyuan Man
- ‡College of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Shouzhen Jiang
- ‡College of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Jihua Wang
- †College of Physics and Electronic Information, Shandong Provincial Key Laboratory of Functional Macromolecular Biophysics, Institute of Biophysics, Dezhou University, Dezhou 253023, China
| | - Jie Wei
- §Department of Neurology, Dezhou People's Hospital, Dezhou 253014, China
| | - Shida Xu
- ∥Department of Internal Medicine, Dezhou People's Hospital, Dezhou 253014,China
| | - Hanping Liu
- †College of Physics and Electronic Information, Shandong Provincial Key Laboratory of Functional Macromolecular Biophysics, Institute of Biophysics, Dezhou University, Dezhou 253023, China
| | - Shoubao Gao
- ‡College of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Huilan Liu
- †College of Physics and Electronic Information, Shandong Provincial Key Laboratory of Functional Macromolecular Biophysics, Institute of Biophysics, Dezhou University, Dezhou 253023, China
| | - Zhenhua Li
- †College of Physics and Electronic Information, Shandong Provincial Key Laboratory of Functional Macromolecular Biophysics, Institute of Biophysics, Dezhou University, Dezhou 253023, China
| | - Hongsheng Li
- ⊥Department of Radiation Oncology, Key Laboratory of Radiation Oncology of Shandong Province, Shandong Cancer Hospital and Institute, Jinan 250117, China
| | - Hengwei Qiu
- ‡College of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| |
Collapse
|
45
|
A novel strategy for dual-channel detection of metallothioneins and mercury based on the conformational switching of functional chimera aptamer. J Pharm Biomed Anal 2015; 107:258-64. [DOI: 10.1016/j.jpba.2015.01.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/20/2014] [Accepted: 01/06/2015] [Indexed: 02/02/2023]
|
46
|
Zhang Y, Yue Y, Peng Y, Huang C, Li L, Guo L, Yang S. One-pot synthesis affords perfectly six-fold symmetrical Au microsnowflakes for excellent electrochemical biosensing and surface-enhanced Raman scattering assays. RSC Adv 2015. [DOI: 10.1039/c4ra16309e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Herein, Au microsnowflakes with six-fold symmetrical branches were successfully synthesized.
Collapse
Affiliation(s)
- Yan Zhang
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- China
| | - Yonghai Yue
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- China
| | - Yi Peng
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- China
| | - Chengcheng Huang
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- China
| | - Lidong Li
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- China
| | - Lin Guo
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- China
| | - Shihe Yang
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- China
- Department of Chemistry
| |
Collapse
|
47
|
Xu S, Wang J, Zou Y, Liu H, Wang G, Zhang X, Jiang S, Li Z, Cao D, Tang R. High performance SERS active substrates fabricated by directly growing graphene on Ag nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra18333b] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
An efficient surface enhanced Raman scattering (SERS) substrate of graphene-isolated Ag nanoparticle (G/AgNP) has been developed by using excimer laser to ablate the ordered pyrolytic graphite in high vacuum onto Ag nanoparticles.
Collapse
|
48
|
Yang T, Guo X, Wu Y, Wang H, Fu S, Wen Y, Yang H. Facile and label-free detection of lung cancer biomarker in urine by magnetically assisted surface-enhanced Raman scattering. ACS APPLIED MATERIALS & INTERFACES 2014; 6:20985-93. [PMID: 25393238 DOI: 10.1021/am5057536] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Adenosine plays a crucial role in the regulation of physiological activity in various tissues and organs. As adenosine is a possible biomarker for cancer, the determination of its level presents a demanding task for deeply monitoring progress of diseases. Through the synthesis of Fe3O4/Au/Ag nanocomposites weaved and stabilized by phytic acid and its salt, we develop a magnetically assisted surface-enhanced Raman scattering (SERS) protocol to determine trace level adenosine in urine samples from both lung cancer patients and health human. The magnetic properties of the nanocomposites enable to realize the simple separation of targeted molecules from a complex matrix and the Au/Ag nanoparticles moieties act as the SERS platform. This label-free Fe3O4/Au/Ag-nanocomposites-based SERS protocol shows a good stability, reproducibility, time efficiency (less than 20 min for one sample test), and huge sensitivity down to 1 × 10(-10) M. The protocol also has high selectivity because SERS signal of adenosine provides the molecular fingerprint information as well as an azo coupling pretreatment is performed to remove the interference of urea. Furthermore, a SERS array is designed for on-site screening adenosine in urine samples in a massive way using a portable Raman. Such a magnetically assisted SERS method as a powerful alternative can be expected as a smart and promising tool for effective assessment of healthcare.
Collapse
Affiliation(s)
- Tianxi Yang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors and Department of Chemistry, Shanghai Normal University , Shanghai 200234, P. R. China
| | | | | | | | | | | | | |
Collapse
|
49
|
Heilkenbrinker A, Reinemann C, Stoltenburg R, Walter JG, Jochums A, Stahl F, Zimmermann S, Strehlitz B, Scheper T. Identification of the target binding site of ethanolamine-binding aptamers and its exploitation for ethanolamine detection. Anal Chem 2014; 87:677-85. [PMID: 25435319 DOI: 10.1021/ac5034819] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Aptamers are promising recognition elements for sensitive and specific detection of small molecules. We have previously selected ssDNA aptamers for ethanolamine, one of the smallest aptamer targets so far. The work presented here focuses on the determination of the binding region within the aptamer structure and its exploitation for the development of an aptamer-based assay for detection of ethanolamine. Sequence analysis of the aptamers resulted in the identification of a G-rich consensus sequence, which was able to fold in a typical two- or three-layered G-quartet structure. Experiments with stepwise truncated variants of the aptamers revealed that the consensus sequence is responsible and sufficient for binding to the target. On the basis of the knowledge of the aptamers binding site, we developed an aptamer-based microarray assay relying on competition between ethanolamine and an oligonucleotide complementary to the consensus sequence. Competitive binding of ethanolamine and fluorescently labeled complementary oligonucleotides resulted in fluorescence intensities dependent on ethanolamine concentration with a limit of detection of 10 pM. This method enables detection of small molecules without any labeling of analytes. The competitive assay could potentially be transferred to other aptamers and thus provides a promising system for aptamer-based detection of diverse small molecules.
Collapse
Affiliation(s)
- Alexandra Heilkenbrinker
- Gottfried Wilhelm Leibniz Universität Hannover, Institut für Technische Chemie, Callinstr. 5, D-30167 Hannover, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Hung SY, Shih YC, Tseng WL. Tween 20-stabilized gold nanoparticles combined with adenosine triphosphate-BODIPY conjugates for the fluorescence detection of adenosine with more than 1000-fold selectivity. Anal Chim Acta 2014; 857:64-70. [PMID: 25604821 DOI: 10.1016/j.aca.2014.11.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 11/26/2014] [Accepted: 11/30/2014] [Indexed: 01/27/2023]
Abstract
This study describes the development of a simple, enzyme-free, label-free, sensitive, and selective system for detecting adenosine based on the use of Tween 20-stabilized gold nanoparticles (Tween 20-AuNPs) as an efficient fluorescence quencher for boron dipyrromethene-conjugated adenosine 5'-triphosphate (BODIPY-ATP) and as a recognition element for adenosine. BODIPY-ATP can interact with Tween 20-AuNPs through the coordination between the adenine group of BODIPY-ATP and Au atoms on the NP surface, thereby causing the fluorescence quenching of BODIPY-ATP through the nanometal surface energy transfer (NSET) effect. When adenosine attaches to the NP surface, the attached adenosine exhibits additional electrostatic attraction to BODIPY-ATP. As a result, the presence of adenosine enhances the efficiency of AuNPs in fluorescence quenching of BODIPY-ATP. The AuNP-induced fluorescence quenching of BODIPY-ATP progressively increased with an increase in the concentration of adenosine; the detection limit at a signal-to-noise ratio of 3 for adenosine was determined to be 60nM. The selectivity of the proposed system was more than 1000-fold for adenosine over any adenosine analogs and other nucleotides. The proposed system combined with a phenylboronic acid-containing column was successfully applied to the determination of adenosine in urine.
Collapse
Affiliation(s)
- Szu-Ying Hung
- Department of Chemistry, National Sun Yat-sen University, Taiwan
| | - Ya-Chen Shih
- Department of Chemistry, National Sun Yat-sen University, Taiwan
| | - Wei-Lung Tseng
- Department of Chemistry, National Sun Yat-sen University, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Taiwan; Center for Nanoscience and Nanotechnology, National Sun Yat-sen University, Taiwan; Center for Stem Cell Research, Kaohsiung Medical University, Taiwan.
| |
Collapse
|