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Zhang Y, Zhao C, Guo Z, Yang T, Zhang X, Huang X, Shi J, Gao S, Zou X. Ultrasensitive Analysis of Escherichia coli O157:H7 Based on Immunomagnetic Separation and Labeled Surface-Enhanced Raman Scattering with Minimized False Positive Identifications. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:22349-22359. [PMID: 39327911 DOI: 10.1021/acs.jafc.4c06311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/28/2024]
Abstract
It is a big challenge to monitor pathogens in food with high selectivity. In this study, we reported an ultrasensitive method for Escherichia coli O157:H7 detection based on immunomagnetic separation and labeled surface-enhanced Raman scattering (SERS). The bacterium was identified by heterogeneous recognition elements, monoclonal antibody (mAb), and aptamer. E. coli O157:H7 was separated and enriched by magnetic nanoparticles modified by mAb, and then a plasmonic nanostructure functionalized by aptamers with embedded Raman tags and interior gaps was utilized for further discrimination and detection. The selectivity was enhanced by two binding sites. The higher Raman enhancement was obtained by strong local electromagnetic field oscillation in the gap and the firm embedment of 4-mercaptopyridine (4-Mpy). Optimum experiments created that SERS signals of 4-Mpy at 1010 cm-1 had a good linearity with E. coli O157:H7 at a large range of 10 to 107 CFU/mL with a limit of detection of 2 CFU/mL. This method has great potential for on-site food pathogenic bacterial detection.
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Affiliation(s)
- Yang Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Chuping Zhao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Zhiming Guo
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Tianxi Yang
- Nutrition and Health, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Xinai Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Xiaowei Huang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Jiyong Shi
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Shipeng Gao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Xiaobo Zou
- International Joint Research Laboratory of Intelligent Agriculture and Agriproducts Processing, China Light Industry Key Laboratory of Food Intelligent Detection & Processing, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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Abbas N, Jang SJ, Kim TH. Cytosine-Rich Oligonucleotide and Electrochemically Reduced Graphene Oxide Nanocomposite for Ultrasensitive Electrochemical Ag + Sensing. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:775. [PMID: 38727369 PMCID: PMC11085715 DOI: 10.3390/nano14090775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 04/19/2024] [Accepted: 04/26/2024] [Indexed: 05/12/2024]
Abstract
Silver ions (Ag+) are crucial in various fields, but pose environmental and health risks at high concentrations. This study presents a straightforward approach for the ultra-trace detection of Ag+, utilizing a composite of a cytosine-rich oligonucleotide (CRO) and an electrochemically reduced graphene oxide (ERGO). Initially, ERGO was synthesized on a glassy carbon electrode (GCE) through the reduction of graphene oxide (GO) via cyclic voltammetry. A methylene blue-tagged CRO (MB-CRO) was then anchored to the ERGO surface through π-π interactions, resulting in the formation of an MB-CRO-modified ERGO electrode (MB-CRO/ERGO-GCE). The interaction with Ag+ ions induced the formation of silver-mediated C-Ag+-C coordination, prompting the MB-CRO to adopt a hairpin structure. This conformational change led to the desorption of the MB-CRO from the ERGO-GCE, causing a variation in the redox current of the methylene blue associated with the MB-CRO. Electrochemical assays revealed that the sensor exhibits extraordinary sensitivity to Ag+ ions, with a linear detection range from 1 femtomolar (fM) to 100 nanomolars (nM) and a detection limit of 0.83 fM. Moreover, the sensor demonstrated high selectivity for Ag+ ions and several other benefits, including stability, reproducibility, and straightforward fabrication and operational procedures. Additionally, real sample analyses were performed using the modified electrode to detect Ag+ in tap and pond water samples, yielding satisfactory recovery rates.
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Affiliation(s)
| | | | - Tae Hyun Kim
- Department of Chemistry, Soonchunhyang University, Asan 31538, Republic of Korea; (N.A.); (S.J.J.)
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Léguillier V, Heddi B, Vidic J. Recent Advances in Aptamer-Based Biosensors for Bacterial Detection. BIOSENSORS 2024; 14:210. [PMID: 38785684 PMCID: PMC11117931 DOI: 10.3390/bios14050210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/09/2024] [Accepted: 04/19/2024] [Indexed: 05/25/2024]
Abstract
The rapid and sensitive detection of pathogenic bacteria is becoming increasingly important for the timely prevention of contamination and the treatment of infections. Biosensors based on nucleic acid aptamers, integrated with optical, electrochemical, and mass-sensitive analytical techniques, have garnered intense interest because of their versatility, cost-efficiency, and ability to exhibit high affinity and specificity in binding bacterial biomarkers, toxins, and whole cells. This review highlights the development of aptamers, their structural characterization, and the chemical modifications enabling optimized recognition properties and enhanced stability in complex biological matrices. Furthermore, recent examples of aptasensors for the detection of bacterial cells, biomarkers, and toxins are discussed. Finally, we explore the barriers to and discuss perspectives on the application of aptamer-based bacterial detection.
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Affiliation(s)
- Vincent Léguillier
- INRAE, AgroParisTech, Micalis Institut, Université Paris-Saclay, UMR 1319, 78350 Jouy-en-Josas, France;
- ENS Paris-Saclay, Laboratoire de Biologie et Pharmacologie Appliquée (LBPA), UMR8113 CNRS, 91190 Gif-sur-Yvette, France
| | - Brahim Heddi
- ENS Paris-Saclay, Laboratoire de Biologie et Pharmacologie Appliquée (LBPA), UMR8113 CNRS, 91190 Gif-sur-Yvette, France
| | - Jasmina Vidic
- INRAE, AgroParisTech, Micalis Institut, Université Paris-Saclay, UMR 1319, 78350 Jouy-en-Josas, France;
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Jamal RB, Bay Gosewinkel U, Ferapontova EE. Electrocatalytic aptasensor for bacterial detection exploiting ferricyanide reduction by methylene blue on mixed PEG/aptamer monolayers. Bioelectrochemistry 2024; 156:108620. [PMID: 38006817 DOI: 10.1016/j.bioelechem.2023.108620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 11/19/2023] [Accepted: 11/20/2023] [Indexed: 11/27/2023]
Abstract
Pathogen-triggered infections are the most severe global threat to human health, and to provide their timely treatment and prevention, robust methods for rapid and reliable identification of pathogenic microorganisms are required. Here, we have developed a fast and inexpensive electrocatalytic aptamer assay enabling specific and ultrasensitive detection of E. coli. E. coli, a biomarker of environmental contamination and infections, was captured on the mixed aptamer/thiolated PEG self-assembled monolayers formed on electrochemically pre-treated gold screen-printed electrodes (SPE). Signals from aptamer - E. coli binding were amplified by electrocatalytic reduction of ferricyanide mediated by methylene blue (MB) adsorbed on bacterial and aptamer surfaces. PEG operated as an antifouling agent and inhibited direct (not MB-mediated) discharge of ferricyanide. The assay allowed from 10 to 1000 CFU mL-1E. coli detection in 30 min, with no interference from B. subtilis, in buffer and artificial urine samples. This electrocatalytic approach is fast, specific, sensitive, and can be used directly in in-field and point-of-care applications for analysis of bacteria in human environment.
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Affiliation(s)
- Rimsha B Jamal
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark
| | - Ulrich Bay Gosewinkel
- Department of Environmental Science, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark
| | - Elena E Ferapontova
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark.
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Liu M, Dou S, Vriesekoop F, Geng L, Zhou S, Huang J, Sun J, Sun X, Guo Y. Advances in signal amplification strategies applied in pathogenic bacteria apta-sensing analysis-A review. Anal Chim Acta 2024; 1287:341938. [PMID: 38182333 DOI: 10.1016/j.aca.2023.341938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 10/18/2023] [Accepted: 10/19/2023] [Indexed: 01/07/2024]
Abstract
Pathogenic bacteria are primarily kinds of food hazards that provoke serious harm to human health via contaminated or spoiled food. Given that pathogenic bacteria continue to reproduce and expand once they contaminate food, pathogenic bacteria of high concentration triggers more serious losses and detriments. Hence, it is essential to detect low-dose pollution at an early stage with high sensitivity. Aptamers, also known as "chemical antibodies", are oligonucleotide sequences that have attracted much attention owing to their merits of non-toxicity, small size, variable structure as well as easy modification of functional group. Aptamer-based bioanalysis has occupied a critical position in the field of rapid detection of pathogenic bacteria. This is attributed to the unique advantage of using aptamers as recognition elements in signal amplification strategies. The signal amplification strategy is an effective means to improve the detection sensitivity. Some diverse signal amplification strategies emphasize the synthesis and assembly of nanomaterials with signal amplification capabilities, while others introduce various nucleic acid amplification techniques into the detection system. This review focuses on a variety of signal amplification strategies employed in aptamer-based detection approaches to pathogenic bacteria. Meanwhile, we provided a detailed introduction to the design principles and characteristics of signal amplification strategies, as well as the improvement of sensor sensitivity. Ultimately, the existing issues and development trends of applying signal amplification strategies in apta-sensing analysis of pathogenic bacteria are critically proposed and prospected. Overall, this review discusses from a new perspective and is expected to contribute to the further development of this field.
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Affiliation(s)
- Mengyue Liu
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China
| | - Shouyi Dou
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China
| | - Frank Vriesekoop
- Department of Food, Land and Agribusiness Management, Harper Adams University, Newport, United Kingdom
| | - Lingjun Geng
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China
| | - Shuxian Zhou
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China
| | - Jingcheng Huang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China
| | - Jiashuai Sun
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China
| | - Xia Sun
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China.
| | - Yemin Guo
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Shandong Provincial Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo, Shandong, 255049, China.
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Ma N, Sun M, Shi H, Xue L, Zhang M, Yang W, Dang Y, Qiao Z. A Colorimetric/Fluorescent Dual-Mode Aptasensor for Salmonella Based on the Magnetic Separation of Aptamers and a DNA-Nanotriangle Programmed Multivalent Aptamer. Foods 2023; 12:3853. [PMID: 37893744 PMCID: PMC10606715 DOI: 10.3390/foods12203853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/09/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023] Open
Abstract
Salmonella infection has emerged as a global health threat, causing death, disability, and socioeconomic disruption worldwide. The rapid and sensitive detection of Salmonella is of great significance in guaranteeing food safety. Herein, we developed a colorimetric/fluorescent dual-mode method based on a DNA-nanotriangle programmed multivalent aptamer for the sensitive detection of Salmonella. In this system, aptamers are precisely controlled and assembled on a DNA nanotriangle structure to fabricate a multivalent aptamer (NTri-Multi-Apt) with enhanced binding affinity and specificity toward Salmonella. The NTri-Multi-Apt was designed to carry many streptavidin-HRPs for colorimetric read-outs and a large load of Sybr green I in the dsDNA scaffold for the output of a fluorescent signal. Therefore, combined with the magnetic separation of aptamers and the prefabricated NTri-Multi-Apt, the dual-mode approach achieved simple and sensitive detection, with LODs of 316 and 60 CFU/mL for colorimetric and fluorescent detection, respectively. Notably, the fluorescent mode provided a self-calibrated and fivefold-improved sensitivity over colorimetric detection. Systematic results also revealed that the proposed dual-mode method exhibited high specificity and applicability for milk, egg white, and chicken meat samples, serving as a promising tool for real bacterial sample testing. As a result, the innovative dual-mode detection method showed new insights for the detection of other pathogens.
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Affiliation(s)
- Na Ma
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo 315800, China
| | - Mengni Sun
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo 315800, China
| | - Hanxing Shi
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo 315800, China
| | - Liangliang Xue
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo 315800, China
| | - Min Zhang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo 315800, China
| | - Wenge Yang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo 315800, China
| | - Yali Dang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo 315800, China
| | - Zhaohui Qiao
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China
- Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, Ningbo University, Ningbo 315800, China
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7
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Yu H, Zhu J, Shen G, Deng Y, Geng X, Wang L. Improving aptamer performance: key factors and strategies. Mikrochim Acta 2023; 190:255. [PMID: 37300603 DOI: 10.1007/s00604-023-05836-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 05/16/2023] [Indexed: 06/12/2023]
Abstract
Aptamers are functional single-stranded oligonucleotide fragments isolated from randomized libraries by Systematic Evolution of Ligands by Exponential Enrichment (SELEX), exhibiting excellent affinity and specificity toward targets. Compared with traditional antibody reagents, aptamers display many desirable properties, such as low variation and high flexibility, and they are suitable for artificial and large-scale synthesis. These advantages make aptamers have a broad application potential ranging from biosensors, bioimaging to therapeutics and other areas of application. However, the overall performance of aptamer pre-selected by SELEX screening is far from being satisfactory. To improve aptamer performance and applicability, various post-SELEX optimization methods have been developed in the last decade. In this review, we first discuss the key factors that influence the performance or properties of aptamers, and then we summarize the key strategies of post-SELEX optimization which have been successfully used to improve aptamer performance, such as truncation, extension, mutagenesis and modification, splitting, and multivalent integration. This review shall provide a comprehensive summary and discussion of post-SELEX optimization methods developed in recent years. Moreover, by discussing the mechanism of each approach, we highlight the importance of choosing the proper method to perform post-SELEX optimization.
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Affiliation(s)
- Hong Yu
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture, Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
- Shanghai Jiao Tong University YunNan (Dali) Research Institute, Dali, 671000, Yunnan, China
- Shanghai Yangtze River Delta Eco-Environmental Change and Management Observation and Research Station, Ministry of Science and Technology, Ministry of Education, 800 Dongchuan Rd, Shanghai, 200240, China
- Shanghai Urban Forest Ecosystem Research Station, National Forestry and Grassland Administration, 800 Dongchuan Rd, Shanghai, 200240, China
| | - Jiangxiong Zhu
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture, Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
- Shanghai Jiao Tong University YunNan (Dali) Research Institute, Dali, 671000, Yunnan, China
- Shanghai Yangtze River Delta Eco-Environmental Change and Management Observation and Research Station, Ministry of Science and Technology, Ministry of Education, 800 Dongchuan Rd, Shanghai, 200240, China
- Shanghai Urban Forest Ecosystem Research Station, National Forestry and Grassland Administration, 800 Dongchuan Rd, Shanghai, 200240, China
| | - Guoqing Shen
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture, Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
- Shanghai Jiao Tong University YunNan (Dali) Research Institute, Dali, 671000, Yunnan, China
- Shanghai Yangtze River Delta Eco-Environmental Change and Management Observation and Research Station, Ministry of Science and Technology, Ministry of Education, 800 Dongchuan Rd, Shanghai, 200240, China
- Shanghai Urban Forest Ecosystem Research Station, National Forestry and Grassland Administration, 800 Dongchuan Rd, Shanghai, 200240, China
| | - Yun Deng
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture, Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
- Shanghai Jiao Tong University YunNan (Dali) Research Institute, Dali, 671000, Yunnan, China
- Shanghai Yangtze River Delta Eco-Environmental Change and Management Observation and Research Station, Ministry of Science and Technology, Ministry of Education, 800 Dongchuan Rd, Shanghai, 200240, China
- Shanghai Urban Forest Ecosystem Research Station, National Forestry and Grassland Administration, 800 Dongchuan Rd, Shanghai, 200240, China
| | - Xueqing Geng
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture, Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
- Shanghai Jiao Tong University YunNan (Dali) Research Institute, Dali, 671000, Yunnan, China
- Shanghai Yangtze River Delta Eco-Environmental Change and Management Observation and Research Station, Ministry of Science and Technology, Ministry of Education, 800 Dongchuan Rd, Shanghai, 200240, China
- Shanghai Urban Forest Ecosystem Research Station, National Forestry and Grassland Administration, 800 Dongchuan Rd, Shanghai, 200240, China
| | - Lumei Wang
- School of Agriculture and Biology, Key Laboratory of Urban Agriculture, Ministry of Agriculture, Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
- Shanghai Jiao Tong University YunNan (Dali) Research Institute, Dali, 671000, Yunnan, China.
- Shanghai Yangtze River Delta Eco-Environmental Change and Management Observation and Research Station, Ministry of Science and Technology, Ministry of Education, 800 Dongchuan Rd, Shanghai, 200240, China.
- Shanghai Urban Forest Ecosystem Research Station, National Forestry and Grassland Administration, 800 Dongchuan Rd, Shanghai, 200240, China.
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Chen W, Chen Z, Lai Q, Zhang Y, Long M, Liang B, Liu Z. Specific and ultrasensitive detection of Staphylococcus aureus with a catechol-chitosan redox capacitor based electrochemical aptasensor. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116357] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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9
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Wang Z, Yang X, Lee NZ, Cao X. Multivalent Aptamer Approach: Designs, Strategies, and Applications. MICROMACHINES 2022; 13:436. [PMID: 35334728 PMCID: PMC8956053 DOI: 10.3390/mi13030436] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/26/2022] [Accepted: 03/10/2022] [Indexed: 12/04/2022]
Abstract
Aptamers are short and single-stranded DNA or RNA molecules with highly programmable structures that give them the ability to interact specifically with a large variety of targets, including proteins, cells, and small molecules. Multivalent aptamers refer to molecular constructs that combine two or more identical or different types of aptamers. Multivalency increases the avidity of aptamers, a particularly advantageous feature that allows for significantly increased binding affinities in comparison with aptamer monomers. Another advantage of multivalency is increased aptamer stabilities that confer improved performances under physiological conditions for various applications in clinical settings. The current study aims to review the most recent developments in multivalent aptamer research. The review will first discuss structures of multivalent aptamers. This is followed by detailed discussions on design strategies of multivalent aptamer approaches. Finally, recent developments of the multivalent aptamer approach in biosensing and biomedical applications are highlighted.
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Affiliation(s)
- Zhong Wang
- Ottawa-Carleton Institute of Biomedical Engineering, University of Ottawa, Ottawa, ON K1N 6N5, Canada;
| | - Xiuying Yang
- Hainan Institute of Science and Technology, Haikou 571125, China;
| | - Nicholas Zhou Lee
- Department of Microbiology and Immunology, McGill University, Montréal, QC H3A 0G4, Canada;
| | - Xudong Cao
- Ottawa-Carleton Institute of Biomedical Engineering, University of Ottawa, Ottawa, ON K1N 6N5, Canada;
- Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON K1N 6N5, Canada
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Li Y, Wang X, Ning W, Yang E, Li Y, Luo Z, Duan Y. Sandwich method-based sensitivity enhancement of Ω-shaped fiber optic LSPR for time-flexible bacterial detection. Biosens Bioelectron 2021; 201:113911. [PMID: 35007995 DOI: 10.1016/j.bios.2021.113911] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 12/14/2022]
Abstract
The development of rapid and sensitive detection methods for pathogenic bacteria is crucial for the therapy and prevention of related diseases. However, the rapid and ultrasensitive assays are difficult to be realized simultaneously. To solve the problem, a sandwich method based on Ω-shaped fiber optic localized surface resonance (Ω-FOLSPR) was constructed, where poly adenine-tailed aptamer (PolyA-apt) and SH modified gold nanoparticles tags (AuNPs tags) were chosen as the capturing aptamer and amplifying tags, respectively. The small AuNPs were modified on the surface of fiber-optic (FO) rapidly, which saved the preparation time. Then, the PolyA-apt was modified on the AuNPs surface to capture the bacteria effectively due to its ability to adjust the density and conformation of aptamer on the AuNPs surface. Finally, the large AuNPs tags were used to generate intense signal enhancement. It is found that the sandwich method enables the unique characteristic of a time-dependent sensitivity enhancement. Specifically, the LOD of 108.0 CFU/mL and 7.4 CFU/mL was achieved with the analysis time of 10 min and 100 min, respectively. Besides, the Ω-FOLSPR sensor exhibits excellent selectivity against the other bacteria and good performance for detecting the spiked and natural samples. This sandwich method provides a time-flexible strategy due to the combination of effective signal amplification and real-time analysis for bacterial detection, displaying great potential for practical bacterial detection.
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Affiliation(s)
- Yu Li
- Research Center of Analytical Instrumentation, Key Laboratory of Bio-resource and Eco-environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu, 610065, Sichuan, People's Republic of China
| | - Xu Wang
- Research Center of Analytical Instrumentation, School of Mechanical Engineering, Sichuan University, Chengdu, 610065, China
| | - Wei Ning
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, 610041, China
| | - Enlai Yang
- Research Center of Analytical Instrumentation, Key Laboratory of Bio-resource and Eco-environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu, 610065, Sichuan, People's Republic of China
| | - Yongxin Li
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, 610041, China
| | - Zewei Luo
- Research Center of Analytical Instrumentation, Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069, Shaanxi, PR China.
| | - Yixiang Duan
- Research Center of Analytical Instrumentation, Key Laboratory of Bio-resource and Eco-environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu, 610065, Sichuan, People's Republic of China.
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11
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Li B, Feng D, Miao Y, Liang X, Gu L, Lan H, Gao S, Zhang Y, Deng Y, Geng L. The systemic characterization of aptamer cocktail for bacterial detection studied by graphene oxide-based fluorescence resonance energy transfer aptasensor. J Mol Recognit 2021; 34:e2934. [PMID: 34553439 DOI: 10.1002/jmr.2934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 08/12/2021] [Indexed: 12/15/2022]
Abstract
Aptamers have gained significant attention as the molecular recognition element to replace antibodies in sensor development and target delivery. Nevertheless, it is noteworthy that unlike the wide application of polyvalent antibodies, existing researches on the combined use of heterologous aptamers with similar recognition affinity and specificity for target detection were sporadic. Herein, first, the wide existence of polyaptamer for bacteria was revealed through the summary of existing literature. Furthermore, based on the establishment of a sensitive aptamer cocktail/graphene oxide fluorescence resonance energy transfer polyaptasensor with a detection limit as low as 10 CFU/ml, the systemic characterization of aptamer cocktails in bacterial detection was carried out by taking E. coli, Vi. parahemolyticus, S. typhimurium, and C. sakazakii as the assay targets. It was turned out that the polyaptasensors for C. sakazakii and S. typhimurium owned prevalence in the broader concentration range of target bacteria. While the polyaptasensors for E. coli and V. parahemolyticus outperformed monoaptasensor mainly in the lower concentration of target bacteria. The linear relationships between fluorescence recovery and the concentration of bacteria were also discussed. The different characteristics of the bacterial cellular membrane, including the binding affinity and the robustness to variation, are analyzed to be the main reason for the diverse detection performance of aptasensors. The study here enhances a sensor detection strategy with super sensitivity. More importantly, this systemic study on the aptamer cocktail in reference to antibodies will advance the in-depth understanding and rational design of aptamer based biological recognition, detection, and targeting.
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Affiliation(s)
- Baichang Li
- Department of Life, Beijing Institute of Technology, Beijing, China
| | - Dongwei Feng
- Department of Life, Beijing Institute of Technology, Beijing, China
| | - Yunfei Miao
- Department of Life, Beijing Institute of Technology, Beijing, China
| | - Xuewang Liang
- Department of Life, Beijing Institute of Technology, Beijing, China
| | - Le Gu
- Biological Detection Department, BOE Technology Group Co., Ltd., Beijing, China
| | - Hongying Lan
- Department of Life, Beijing Institute of Technology, Beijing, China
| | - Shimeng Gao
- College of Agriculture and Life Sciences, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Yaxi Zhang
- Department of Life, Beijing Institute of Technology, Beijing, China
| | - Yulin Deng
- Department of Life, Beijing Institute of Technology, Beijing, China
| | - Lina Geng
- Department of Life, Beijing Institute of Technology, Beijing, China
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12
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Sharma P, Pandey V, Sharma MMM, Patra A, Singh B, Mehta S, Husen A. A Review on Biosensors and Nanosensors Application in Agroecosystems. NANOSCALE RESEARCH LETTERS 2021; 16:136. [PMID: 34460019 PMCID: PMC8405745 DOI: 10.1186/s11671-021-03593-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 08/14/2021] [Indexed: 05/19/2023]
Abstract
Previous decades have witnessed a lot of challenges that have provoked a dire need of ensuring global food security. The process of augmenting food production has made the agricultural ecosystems to face a lot of challenges like the persistence of residual particles of different pesticides, accretion of heavy metals, and contamination with toxic elemental particles which have negatively influenced the agricultural environment. The entry of such toxic elements into the human body via agricultural products engenders numerous health effects such as nerve and bone marrow disorders, metabolic disorders, infertility, disruption of biological functions at the cellular level, and respiratory and immunological diseases. The exigency for monitoring the agroecosystems can be appreciated by contemplating the reported 220,000 annual deaths due to toxic effects of residual pesticidal particles. The present practices employed for monitoring agroecosystems rely on techniques like gas chromatography, high-performance liquid chromatography, mass spectroscopy, etc. which have multiple constraints, being expensive, tedious with cumbersome protocol, demanding sophisticated appliances along with skilled personnel. The past couple of decades have witnessed a great expansion of the science of nanotechnology and this development has largely facilitated the development of modest, quick, and economically viable bio and nanosensors for detecting different entities contaminating the natural agroecosystems with an advantage of being innocuous to human health. The growth of nanotechnology has offered rapid development of bio and nanosensors for the detection of several composites which range from several metal ions, proteins, pesticides, to the detection of complete microorganisms. Therefore, the present review focuses on different bio and nanosensors employed for monitoring agricultural ecosystems and also trying to highlight the factor affecting their implementation from proof-of-concept to the commercialization stage.
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Affiliation(s)
- Pankaj Sharma
- Department of Microbiology, CCS Haryana Agricultural University, Hisar, Haryana 125004 India
| | - Vimal Pandey
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Mayur Mukut Murlidhar Sharma
- Department of Agriculture and Life Industry, Kangwon National University, Chuncheon, Gangwon-do 24341 Republic of Korea
| | - Anupam Patra
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Baljinder Singh
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Sahil Mehta
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067 India
| | - Azamal Husen
- Wolaita Sodo University, P.O. Box: 138, Wolaita, Ethiopia
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13
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Wan Q, Liu X, Zu Y. Oligonucleotide aptamers for pathogen detection and infectious disease control. Theranostics 2021; 11:9133-9161. [PMID: 34522231 PMCID: PMC8419047 DOI: 10.7150/thno.61804] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 08/04/2021] [Indexed: 12/21/2022] Open
Abstract
During an epidemic or pandemic, the primary task is to rapidly develop precise diagnostic approaches and effective therapeutics. Oligonucleotide aptamer-based pathogen detection assays and control therapeutics are promising, as aptamers that specifically recognize and block pathogens can be quickly developed and produced through simple chemical synthesis. This work reviews common aptamer-based diagnostic techniques for communicable diseases and summarizes currently available aptamers that target various pathogens, including the SARS-CoV-2 virus. Moreover, this review discusses how oligonucleotide aptamers might be leveraged to control pathogen propagation and improve host immune system responses. This review offers a comprehensive data source to the further develop aptamer-based diagnostics and therapeutics specific for infectious diseases.
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Affiliation(s)
| | | | - Youli Zu
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX 77030, USA
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14
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Saad M, Faucher SP. Aptamers and Aptamer-Coupled Biosensors to Detect Water-Borne Pathogens. Front Microbiol 2021; 12:643797. [PMID: 33679681 PMCID: PMC7933031 DOI: 10.3389/fmicb.2021.643797] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 02/01/2021] [Indexed: 12/12/2022] Open
Abstract
Aptamers can serve as efficient bioreceptors for the development of biosensing detection platforms. Aptamers are short DNA or RNA oligonucleotides that fold into specific structures, which enable them to selectively bind to target analytes. The method used to identify aptamers is Systematic Evolution of Ligands through Exponential Enrichment (SELEX). Target properties can have an impact on aptamer efficiencies. Therefore, characteristics of water-borne microbial targets must be carefully considered during SELEX for optimal aptamer development. Several aptamers have been described for key water-borne pathogens. Here, we provide an exhaustive overview of these aptamers and discuss important microbial aspects to consider when developing such aptamers.
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Affiliation(s)
- Mariam Saad
- Department of Natural Resources, Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, QC, Canada
- Centre de Recherche en Infectiologie Porcine et Avicole (CRIPA), Université de Montréal, Faculté de Médecine Vétérinaire, Saint-Hyacinthe, QC, Canada
| | - Sebastien P. Faucher
- Department of Natural Resources, Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, QC, Canada
- Centre de Recherche en Infectiologie Porcine et Avicole (CRIPA), Université de Montréal, Faculté de Médecine Vétérinaire, Saint-Hyacinthe, QC, Canada
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15
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Wan Q, Liu X, Zeng Z, Chen Z, Liu Y, Zu Y. Aptamer Cocktail to Detect Multiple Species of Mycoplasma in Cell Culture. Int J Mol Sci 2020; 21:E3784. [PMID: 32471128 PMCID: PMC7312096 DOI: 10.3390/ijms21113784] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/21/2020] [Accepted: 05/25/2020] [Indexed: 02/07/2023] Open
Abstract
Mycoplasma contamination of cell line cultures is a common, yet often undetected problem in research laboratories. Many of the existing techniques to detect mycoplasma contamination of cultured cells are time-consuming, expensive, and have significant drawbacks. Here, we describe a mycoplasma detection system that is useful for detecting multiple species of mycoplasma in infected cell lines. The system contains three dye-labeled detection aptamers that can specifically bind to mycoplasma-infected cells and a dye-labeled control aptamer that minimally binds to cells. With this system, mycoplasma-contaminated cells can be detected within 30 min by using a flow cytometer, fluorescence microscope, or microplate reader. Further, this system may be used to detect mycoplasma-contaminated culture medium. This study presents an novel mycoplasma detection model that is simple, rapid, inexpensive, and sensitive.
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Affiliation(s)
| | | | | | | | | | - Youli Zu
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, 6565 Fannin Street, Houston, TX 77030, USA; (Q.W.); (X.L.); (Z.Z.); (Z.C.); (Y.L.)
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16
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Sensitive detection of a bacterial pathogen using allosteric probe-initiated catalysis and CRISPR-Cas13a amplification reaction. Nat Commun 2020; 11:267. [PMID: 31937772 PMCID: PMC6959245 DOI: 10.1038/s41467-019-14135-9] [Citation(s) in RCA: 166] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 12/13/2019] [Indexed: 12/26/2022] Open
Abstract
The ability to detect low numbers of microbial cells in food and clinical samples is highly valuable but remains a challenge. Here we present a detection system (called ‘APC-Cas’) that can detect very low numbers of a bacterial pathogen without isolation, using a three-stage amplification to generate powerful fluorescence signals. APC-Cas involves a combination of nucleic acid-based allosteric probes and CRISPR-Cas13a components. It can selectively and sensitively quantify Salmonella Enteritidis cells (from 1 to 105 CFU) in various types of samples such as milk, showing similar or higher sensitivity and accuracy compared with conventional real-time PCR. Furthermore, APC-Cas can identify low numbers of S. Enteritidis cells in mouse serum, distinguishing mice with early- and late-stage infection from uninfected mice. Our method may have potential clinical applications for early diagnosis of pathogens. The detection of pathogens in food and clinical samples remains a challenge. Here, Shen et al. present a detection system, involving a combination of nucleic acid-based allosteric probes and CRISPR-Cas13a components, that can detect very low numbers of a bacterial pathogen in milk and serum samples without isolation.
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17
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Bauer M, Strom M, Hammond DS, Shigdar S. Anything You Can Do, I Can Do Better: Can Aptamers Replace Antibodies in Clinical Diagnostic Applications? Molecules 2019; 24:molecules24234377. [PMID: 31801185 PMCID: PMC6930532 DOI: 10.3390/molecules24234377] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 11/28/2019] [Accepted: 11/28/2019] [Indexed: 02/07/2023] Open
Abstract
The mainstay of clinical diagnostics is the use of specialised ligands that can recognise specific biomarkers relating to pathological changes. While protein antibodies have been utilised in these assays for the last 40 years, they have proven to be unreliable due to a number of reasons. The search for the 'perfect' targeting ligand or molecular probe has been slow, though the description of chemical antibodies, also known as aptamers, nearly 30 years ago suggested a replacement reagent. However, uptake has been slow to progress into the clinical environment. In this review, we discuss the issues associated with antibodies and describe some of the applications of aptamers that have relevancy to the clinical diagnostic environment.
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Affiliation(s)
- Michelle Bauer
- School of Medicine Deakin University, Geelong, Victoria 3128, Australia; (M.B.); (M.S.); (D.S.H.)
| | - Mia Strom
- School of Medicine Deakin University, Geelong, Victoria 3128, Australia; (M.B.); (M.S.); (D.S.H.)
| | - David S Hammond
- School of Medicine Deakin University, Geelong, Victoria 3128, Australia; (M.B.); (M.S.); (D.S.H.)
- Centre for Molecular and Medical Research, Deakin University, Geelong, Victoria 3128, Australia
| | - Sarah Shigdar
- School of Medicine Deakin University, Geelong, Victoria 3128, Australia; (M.B.); (M.S.); (D.S.H.)
- Centre for Molecular and Medical Research, Deakin University, Geelong, Victoria 3128, Australia
- Correspondence:
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18
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Song JH, Lee SM, Park IH, Yong D, Lee KS, Shin JS, Yoo KH. Vertical capacitance aptasensors for real-time monitoring of bacterial growth and antibiotic susceptibility in blood. Biosens Bioelectron 2019; 143:111623. [PMID: 31472413 DOI: 10.1016/j.bios.2019.111623] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 08/20/2019] [Accepted: 08/21/2019] [Indexed: 01/29/2023]
Abstract
For the treatment of bacteremia, early diagnosis and rapid antibiotic susceptibility tests (ASTs) are necessary because survival chances decrease significantly if the proper antibiotic administration is delayed. However, conventional methods require several days from blood collection to AST as it requires three overnight cultures, including blood culture, subculture, and AST culture. Herein, we report a more rapid method of sensing bacterial growth and AST in blood based on a vertical capacitance sensor functionalized with aptamers. Owing to their vertical structure, the influence of blood cells sunk by gravity on capacitance measurements were minimized. Thus, bacterial growth in blood at 100-103 CFU/mL was monitored in real-time by measuring changes in capacitance at f = 10 kHz. Moreover, real-time capacitance measurements at f = 0.5 kHz provided information on biofilm formation induced during blood cultures. Bacterial growth and biofilm formation are inhibited above the minimal inhibitory concentration of antibiotics; therefore, we also demonstrated that vertical capacitance aptasensors could be applied to rapid AST from positive blood cultures without a need for the subculture process.
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Affiliation(s)
- Jun Ho Song
- Department of Physics, Yonsei University, Seoul, 03722, Republic of Korea
| | - Sun-Mi Lee
- Nanomedical Graduate Program, Yonsei University, Seoul, 03722, Republic of Korea
| | - In Ho Park
- Department of Microbiology, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea; Severance Biomedical Science Institute, Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Dongeun Yong
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Kyo-Seok Lee
- Department of Physics, Yonsei University, Seoul, 03722, Republic of Korea
| | - Jeon-Soo Shin
- Nanomedical Graduate Program, Yonsei University, Seoul, 03722, Republic of Korea; Department of Microbiology, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea; Severance Biomedical Science Institute, Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea.
| | - Kyung-Hwa Yoo
- Department of Physics, Yonsei University, Seoul, 03722, Republic of Korea; Nanomedical Graduate Program, Yonsei University, Seoul, 03722, Republic of Korea.
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19
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Hou S, Mahadevegowda SH, Mai VC, Chan‐Park MB, Duan H. Glycosylated Copper Sulfide Nanocrystals for Targeted Photokilling of Bacteria in the Near‐Infrared II Window. ADVANCED THERAPEUTICS 2019. [DOI: 10.1002/adtp.201900052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shuai Hou
- School of Chemical and Biomedical EngineeringNanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
| | - Surendra H. Mahadevegowda
- School of Chemical and Biomedical EngineeringNanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
| | - Van Cuong Mai
- School of Chemical and Biomedical EngineeringNanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
- Nanyang Environment and Water Research Institute (NEWRI)Nanyang Technological University 1 Cleantech Loop Singapore 637141 Singapore
| | - Mary B. Chan‐Park
- School of Chemical and Biomedical EngineeringNanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
| | - Hongwei Duan
- School of Chemical and Biomedical EngineeringNanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
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20
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Fan X, Xu W, Han J, Jiang X, Wink M, Wu G. Antimicrobial peptide hybrid fluorescent protein based sensor array discriminate ten most frequent clinic isolates. Biochim Biophys Acta Gen Subj 2019; 1863:1158-1166. [DOI: 10.1016/j.bbagen.2019.04.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 03/14/2019] [Accepted: 04/10/2019] [Indexed: 01/30/2023]
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21
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Jamil B, Atlas N, Qazi A, Uzair B. Theranostic Potential of Aptamers in Antimicrobial Chemotherapy. Nanotheranostics 2019. [DOI: 10.1007/978-3-030-29768-8_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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22
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Affiliation(s)
- Ariel L. Furst
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Matthew B. Francis
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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23
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Wang L, Wang R, Wei H, Li Y. Selection of aptamers against pathogenic bacteria and their diagnostics application. World J Microbiol Biotechnol 2018; 34:149. [PMID: 30220026 DOI: 10.1007/s11274-018-2528-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 08/31/2018] [Indexed: 10/28/2022]
Abstract
Aptamers are short nucleotide sequences which can specifically bind to a variety of targets with high affinity. They are identified and selected via systematic evolution of ligands by exponential enrichment (SELEX). Compared to antibodies, aptamers offer several advantages including easy labeling, high stability and lower cost. Those advantages make it possible to be a potential for use as a recognition probe to replace antibody in the diagnostic field. This article is intended to provide a comprehensive review, which is focused on systemizing recent advancements concerning SELEX procedures, with special emphasis on the key steps in SELEX procedures. The principles of various aptamer-based detections of pathogenic bacteria and their application are discussed in detail, including colorimetric detection, fluorescence detection, electrochemical detection, lateral flow strip test, mass sensitive detection and PCR-based aptasensor. By discussing recent research and future trends based on many excellent publications and reviews, we attempt to give the readers a comprehensive view in the field of aptamer selection against pathogenic bacteria and their diagnostics application. Authors hope that this review will promote lively and valuable discussions in order to generate new ideas and approaches towards the development of aptamer-based methods for application in pathogenic bacteria diagnosis.
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Affiliation(s)
- Lijun Wang
- School of Food and Bioengineering, Xihua University, Chengdu, 610039, China.,Department of Biological & Agricultural Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Ronghui Wang
- Department of Biological & Agricultural Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Hua Wei
- Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang, 330047, China
| | - Yanbin Li
- Department of Biological & Agricultural Engineering, University of Arkansas, Fayetteville, AR, 72701, USA. .,Center of Excellence for Poultry Science, University of Arkansas, 203 Engineering Hall, Fayetteville, AR, 72701, USA.
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24
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Kalra P, Dhiman A, Cho WC, Bruno JG, Sharma TK. Simple Methods and Rational Design for Enhancing Aptamer Sensitivity and Specificity. Front Mol Biosci 2018; 5:41. [PMID: 29868605 PMCID: PMC5966647 DOI: 10.3389/fmolb.2018.00041] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 04/13/2018] [Indexed: 12/27/2022] Open
Abstract
Aptamers are structured nucleic acid molecules that can bind to their targets with high affinity and specificity. However, conventional SELEX (Systematic Evolution of Ligands by EXponential enrichment) methods may not necessarily produce aptamers of desired affinity and specificity. Thus, to address these questions, this perspective is intended to suggest some approaches and tips along with novel selection methods to enhance evolution of aptamers. This perspective covers latest novel innovations as well as a broad range of well-established approaches to improve the individual binding parameters (aptamer affinity, avidity, specificity and/or selectivity) of aptamers during and/or post-SELEX. The advantages and limitations of individual aptamer selection methods and post-SELEX optimizations, along with rational approaches to overcome these limitations are elucidated in each case. Further the impact of chosen selection milieus, linker-systems, aptamer cocktails and detection modules utilized in conjunction with target-specific aptamers, on the overall assay performance are discussed in detail, each with its own advantages and limitations. The simple variations suggested are easily available for facile implementation during and/or post-SELEX to develop ultrasensitive and specific assays. Finally, success studies of established aptamer-based assays are discussed, highlighting how they utilized some of the suggested methodologies to develop commercially successful point-of-care diagnostic assays.
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Affiliation(s)
- Priya Kalra
- Department of Biotechnology, All India Institute of Medical Sciences, New Delhi, India
| | - Abhijeet Dhiman
- Department of Biotechnology, All India Institute of Medical Sciences, New Delhi, India.,Faculty of Pharmacy, Uttarakhand Technical University, Dehradun, India
| | - William C Cho
- Department of Clinical Oncology, Queen Elizabeth Hospital, Kowloon, Hong Kong
| | - John G Bruno
- Operational Technologies Corporation, San Antonio, TX, United States
| | - Tarun K Sharma
- Center for Biodesign and Diagnostics, Translational Health Science and Technology Institute, Faridabad, India.,AptaBharat Innovation Private Limited, Translational Health Science and Technology Institute Incubator, Faridabad, India
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25
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Abbasian F, Ghafar-Zadeh E, Magierowski S. Microbiological Sensing Technologies: A Review. Bioengineering (Basel) 2018; 5:E20. [PMID: 29498670 PMCID: PMC5874886 DOI: 10.3390/bioengineering5010020] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 02/23/2018] [Accepted: 02/23/2018] [Indexed: 12/13/2022] Open
Abstract
Microorganisms have a significant influence on human activities and health, and consequently, there is high demand to develop automated, sensitive, and rapid methods for their detection. These methods might be applicable for clinical, industrial, and environmental applications. Although different techniques have been suggested and employed for the detection of microorganisms, and the majority of these methods are not cost effective and suffer from low sensitivity and low specificity, especially in mixed samples. This paper presents a comprehensive review of microbiological techniques and associated challenges for bioengineering researchers with an engineering background. Also, this paper reports on recent technological advances and their future prospects for a variety of microbiological applications.
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Affiliation(s)
- Firouz Abbasian
- Biologically Inspired Sensors and Actuators Laboratory, Department of EECS, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada.
| | - Ebrahim Ghafar-Zadeh
- Biologically Inspired Sensors and Actuators Laboratory, Department of EECS, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada.
| | - Sebastian Magierowski
- Biologically Inspired Sensors and Actuators Laboratory, Department of EECS, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada.
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26
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Zhang C, Wang C, Xiao R, Tang L, Huang J, Wu D, Liu S, Wang Y, Zhang D, Wang S, Chen X. Sensitive and specific detection of clinical bacteria via vancomycin-modified Fe3O4@Au nanoparticles and aptamer-functionalized SERS tags. J Mater Chem B 2018; 6:3751-3761. [DOI: 10.1039/c8tb00504d] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A sensitive SERS platform for the simultaneous detection of S. aureus and E. coli on the basis of dual recognition by vancomycin and aptamers is reported.
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27
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Jo N, Kim B, Lee SM, Oh J, Park IH, Jin Lim K, Shin JS, Yoo KH. Aptamer-functionalized capacitance sensors for real-time monitoring of bacterial growth and antibiotic susceptibility. Biosens Bioelectron 2017; 102:164-170. [PMID: 29132052 DOI: 10.1016/j.bios.2017.11.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 10/15/2017] [Accepted: 11/01/2017] [Indexed: 12/20/2022]
Abstract
To prevent spread of infection and antibiotic resistance, fast and accurate diagnosis of bacterial infection and subsequent administration of antimicrobial agents are important. However, conventional methods for bacterial detection and antibiotic susceptibility testing (AST) require more than two days, leading to delays that have contributed to an increase in antibiotic-resistant bacteria. Here, we report an aptamer-functionalized capacitance sensor array that can monitor bacterial growth and antibiotic susceptibility in real-time. While E. coli and S. aureus were cultured, the capacitance increased over time, and apparent bacterial growth curves were observed even when 10 CFU/mL bacteria was inoculated. Furthermore, because of the selectivity of aptamers, bacteria could be identified within 1h using the capacitance sensor array functionalized with aptamers. In addition to bacterial growth, antibiotic susceptibility could be monitored in real-time. When bacteria were treated with antibiotics above the minimum inhibitory concentration (MIC), the capacitance decreased because the bacterial growth was inhibited. These results demonstrate that the aptamer-functionalized capacitance sensor array might be applied for rapid ASTs.
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Affiliation(s)
- Namgyeong Jo
- Department of Physics, Yonsei University, Seoul 03722, Republic of Korea
| | - Bongjun Kim
- Department of Physics, Yonsei University, Seoul 03722, Republic of Korea
| | - Sun-Mi Lee
- Department of Physics, Yonsei University, Seoul 03722, Republic of Korea; Nanomedical Graduate Program, Yonsei University, Seoul 03722, Republic of Korea
| | - Jeseung Oh
- Proteomtech Inc., B202 Yonsei Dairy Building, Seoul 03722, Republic of Korea
| | - In Ho Park
- Department of Microbiology, Yonsei University College of Medicine, Seoul 03722, Republic of Korea; Severance Biomedical Science Institute and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Kook Jin Lim
- Nanomedical Graduate Program, Yonsei University, Seoul 03722, Republic of Korea; Proteomtech Inc., B202 Yonsei Dairy Building, Seoul 03722, Republic of Korea
| | - Jeon-Soo Shin
- Nanomedical Graduate Program, Yonsei University, Seoul 03722, Republic of Korea; Department of Microbiology, Yonsei University College of Medicine, Seoul 03722, Republic of Korea; Severance Biomedical Science Institute and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.
| | - Kyung-Hwa Yoo
- Department of Physics, Yonsei University, Seoul 03722, Republic of Korea; Nanomedical Graduate Program, Yonsei University, Seoul 03722, Republic of Korea.
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Han J, Cheng H, Wang B, Braun MS, Fan X, Bender M, Huang W, Domhan C, Mier W, Lindner T, Seehafer K, Wink M, Bunz UHF. A Polymer/Peptide Complex-Based Sensor Array That Discriminates Bacteria in Urine. Angew Chem Int Ed Engl 2017; 56:15246-15251. [DOI: 10.1002/anie.201706101] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 08/15/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Jinsong Han
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Haoran Cheng
- Institute of Pharmacy and Molecular Biotechnology; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany
| | - Benhua Wang
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Markus Santhosh Braun
- Institute of Pharmacy and Molecular Biotechnology; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany
| | - Xiaobo Fan
- Institute of Pharmacy and Molecular Biotechnology; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany
- Diognostics Department; Medical School Southeast University; Nanjing 210009 China
| | - Markus Bender
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Wei Huang
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Cornelius Domhan
- Institute of Pharmacy and Molecular Biotechnology; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany
| | - Walter Mier
- Department of Nuclear Medicine; Heidelberg University; Im Neuenheimer Feld 400 69120 Heidelberg Germany
| | - Thomas Lindner
- Department of Nuclear Medicine; Heidelberg University; Im Neuenheimer Feld 400 69120 Heidelberg Germany
| | - Kai Seehafer
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Michael Wink
- Institute of Pharmacy and Molecular Biotechnology; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany
| | - Uwe H. F. Bunz
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Centre of Advanced Materials; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 225 69120 Heidelberg Germany
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Han J, Cheng H, Wang B, Braun MS, Fan X, Bender M, Huang W, Domhan C, Mier W, Lindner T, Seehafer K, Wink M, Bunz UHF. A Polymer/Peptide Complex-Based Sensor Array That Discriminates Bacteria in Urine. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706101] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jinsong Han
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Haoran Cheng
- Institute of Pharmacy and Molecular Biotechnology; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany
| | - Benhua Wang
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Markus Santhosh Braun
- Institute of Pharmacy and Molecular Biotechnology; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany
| | - Xiaobo Fan
- Institute of Pharmacy and Molecular Biotechnology; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany
- Diognostics Department; Medical School Southeast University; Nanjing 210009 China
| | - Markus Bender
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Wei Huang
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Cornelius Domhan
- Institute of Pharmacy and Molecular Biotechnology; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany
| | - Walter Mier
- Department of Nuclear Medicine; Heidelberg University; Im Neuenheimer Feld 400 69120 Heidelberg Germany
| | - Thomas Lindner
- Department of Nuclear Medicine; Heidelberg University; Im Neuenheimer Feld 400 69120 Heidelberg Germany
| | - Kai Seehafer
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Michael Wink
- Institute of Pharmacy and Molecular Biotechnology; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 364 69120 Heidelberg Germany
| | - Uwe H. F. Bunz
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Centre of Advanced Materials; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 225 69120 Heidelberg Germany
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Dutta J, Naicker T, Ebenhan T, Kruger HG, Arvidsson PI, Govender T. Synthetic approaches to radiochemical probes for imaging of bacterial infections. Eur J Med Chem 2017; 133:287-308. [DOI: 10.1016/j.ejmech.2017.03.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 03/23/2017] [Accepted: 03/24/2017] [Indexed: 02/08/2023]
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Chandola C, Kalme S, Casteleijn MG, Urtti A, Neerathilingam M. Application of aptamers in diagnostics, drug-delivery and imaging. J Biosci 2017; 41:535-61. [PMID: 27581942 DOI: 10.1007/s12038-016-9632-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Aptamers are small, single-stranded oligonucleotides (DNA or RNA) that bind to their target with high specificity and affinity. Although aptamers are analogous to antibodies for a wide range of target recognition and variety of applications, they have significant advantages over antibodies. Since aptamers have recently emerged as a class of biomolecules with an application in a wide array of fields, we need to summarize the latest developments herein. In this review we will discuss about the latest developments in using aptamers in diagnostics, drug delivery and imaging. We begin with diagnostics, discussing the application of aptamers for the detection of infective agents itself, antigens/ toxins (bacteria), biomarkers (cancer), or a combination. The ease of conjugation and labelling of aptamers makes them a potential tool for diagnostics. Also, due to the reduced off-target effects of aptamers, their use as a potential drug delivery tool is emerging rapidly. Hence, we discuss their use in targeted delivery in conjugation with siRNAs, nanoparticles, liposomes, drugs and antibodies. Finally, we discuss about the conjugation strategies applicable for RNA and DNA aptamers for imaging. Their stability and self-assembly after heating makes them superior over protein-based binding molecules in terms of labelling and conjugation strategies.
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Affiliation(s)
- Chetan Chandola
- 1Center for Cellular and Molecular Platforms, NCBS-TIFR, Bangalore 560 065, India
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Song MY, Nguyen D, Hong SW, Kim BC. Broadly reactive aptamers targeting bacteria belonging to different genera using a sequential toggle cell-SELEX. Sci Rep 2017; 7:43641. [PMID: 28272554 PMCID: PMC5341558 DOI: 10.1038/srep43641] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 01/25/2017] [Indexed: 12/23/2022] Open
Abstract
Conventional cell-SELEX aims to isolate aptamers to a single unique target bacteria species. We propose a method to isolate single-stranded DNA aptamers that have broad reactivity to multiple bacterial targets belonging to different genera. The key of the proposed method is that targets of interest are changed sequentially at each SELEX round. The general scheme was examined using six bacteria from different genera, Escherichia coli, Enterobacter aerogenes, Klebsiella pneumoniae, Citrobacter freundii, Bacillus subtilis, and Staphylococcus epidermidis (four gram-negative and two gram-positive bacteria). In the first round of SELEX, the DNA library was incubated with E. coli and amplicons bound to E. coli were separated. The amplicons were sequentially separated by incubation with E. aerogenes, K. pneumoniae, C. freundii, B. subtilis, and S. epidermidis at each SELEX. The amplicons obtained using the last bacterial species were incubated again with the first bacterial species and this loop was repeated two more times. We refer to this method as sequential toggle cell-SELEX (STC-SELEX). The isolated aptamers had dissociation constants of 9.22–38.5 nM and had no affinity to other bacteria that were not included in STC-SELEX. These results demonstrate the potential to isolate aptamers with broad affinity to bacterial taxa in different genera.
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Affiliation(s)
- Min Young Song
- Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Dung Nguyen
- Department of Energy and Environmental Engineering, University of Science and Technology (UST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Seok Won Hong
- Department of Energy and Environmental Engineering, University of Science and Technology (UST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea.,Center for Water Resources Cycle Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Byoung Chan Kim
- Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea.,Department of Energy and Environmental Engineering, University of Science and Technology (UST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
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Chen J, Andler SM, Goddard JM, Nugen SR, Rotello VM. Integrating recognition elements with nanomaterials for bacteria sensing. Chem Soc Rev 2017; 46:1272-1283. [PMID: 27942636 PMCID: PMC5339056 DOI: 10.1039/c6cs00313c] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Pathogenic bacterial contamination is a major threat to human health and safety. In this review, we summarize recent strategies for the integration of recognition elements with nanomaterials for the detection and sensing of pathogenic bacteria. Nanoprobes can provide sensitive and specific detection of bacterial cells, which can be applied across multiple applications and industries.
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Affiliation(s)
- Juhong Chen
- Department of Food Science, Cornell University, Stocking Hall, Ithaca, New York 14853, USA. and Department of Food Science, University of Massachusetts, 102 Holdsworth Way, Amherst, Massachusetts 01003, USA
| | - Stephanie M Andler
- Department of Food Science, Cornell University, Stocking Hall, Ithaca, New York 14853, USA. and Department of Food Science, University of Massachusetts, 102 Holdsworth Way, Amherst, Massachusetts 01003, USA
| | - Julie M Goddard
- Department of Food Science, Cornell University, Stocking Hall, Ithaca, New York 14853, USA. and Department of Food Science, University of Massachusetts, 102 Holdsworth Way, Amherst, Massachusetts 01003, USA
| | - Sam R Nugen
- Department of Food Science, Cornell University, Stocking Hall, Ithaca, New York 14853, USA. and Department of Food Science, University of Massachusetts, 102 Holdsworth Way, Amherst, Massachusetts 01003, USA
| | - Vincent M Rotello
- Department of Chemistry, University of Massachusetts, 710 North Pleasant Street, Amherst, Massachusetts 01003, USA.
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An Update on Aptamer-Based Multiplex System Approaches for the Detection of Common Foodborne Pathogens. FOOD ANAL METHOD 2017. [DOI: 10.1007/s12161-017-0814-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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35
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Ma X, Song L, Zhou N, Xia Y, Wang Z. A novel aptasensor for the colorimetric detection of S. typhimurium based on gold nanoparticles. Int J Food Microbiol 2016; 245:1-5. [PMID: 28107686 DOI: 10.1016/j.ijfoodmicro.2016.12.024] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 12/28/2016] [Accepted: 12/29/2016] [Indexed: 01/18/2023]
Abstract
A simple, fast and convenient colorimetric aptasensor was fabricated for the detection of Salmonella typhimurium (S. typhimurium) which was based on the color change effect of gold nanoparticles (GNPs). S. typhimurium is one of the most common causes of food-associated disease. Aptamers with specific recognition toward S. typhimurium was modified to the surface of prepared GNPs. They play a role for the protection of GNPs from aggregation toward high concentrations of NaCl. With the addition of S. typhimurium, aptamers preferably combined to S. typhimurium and the protection effect was broken. With more S. typhimurium, more aptamers detached from GNPs. In such a situation, the exposed GNPs would aggregated to some extent with the addition of NaCl. The color changed from red, purple to blue which could be characterized by UV-Vis spectrophotometer. The absorbance spectra of GNPs redshifted constantly and the intensity ratio of A700/A521 changed regularly. This could be calculated for the basis of quantitative detection of S. typhimurium from 102cfu/mL to 107cfu/mL. The obtained linear correlation equation was y=0.1946x-0.2800 (R2=0.9939) with a detection limit as low as 56cfu/mL. This method is simple and rapid, results in high sensitivity and specificity, and can be used to detect actual samples.
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Affiliation(s)
- Xiaoyuan Ma
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, PR China
| | - Liangjing Song
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Nixin Zhou
- Department of Health Management and Basic Education, Jiangsu Jiankang Vocational College, Nanjing 211800, PR China
| | - Yu Xia
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, PR China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, PR China.
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Song MY, Jurng J, Park YK, Kim BC. An aptamer cocktail-functionalized photocatalyst with enhanced antibacterial efficiency towards target bacteria. JOURNAL OF HAZARDOUS MATERIALS 2016; 318:247-254. [PMID: 27427891 DOI: 10.1016/j.jhazmat.2016.07.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 06/20/2016] [Accepted: 07/06/2016] [Indexed: 05/25/2023]
Abstract
We developed TiO2 particles conjugated with an Escherichia coli surface-specific ssDNA aptamer cocktail (composed of three different aptamers isolated from E. coli) for targeted and enhanced disinfection of E. coli. We examined the target-specific and enhanced inactivation of this composite (TiO2-Apc), which were compared to those of TiO2 conjugated with a single aptamer (one of the three different aptamers, TiO2-Aps) and non-modified TiO2. We found that TiO2-Apc enhanced the inactivation of targeted E. coli under UV irradiation compared to both the non-modified TiO2 and TiO2-Aps. A higher number of TiO2-Apc than TiO2-Aps particles was observed on the surface of E. coli. The amount of TiO2-Apc required to inactivate ∼99.9% of E. coli (10(6) CFU/ml) was 10 times lower than that of non-modified TiO2. The close proximity of functionalized particles with E. coli resulting from the interaction between the target surface and the aptamer induced the efficient and fast transfer of reactive oxygen species to the cells. In a mixed culture of different bacteria (E. coli and Staphylococcus epidermidis), TiO2-Apc enhanced the inactivation of only E. coli. Taken together, these results support the use of aptamer cocktail-conjugated TiO2 for improvement of the target-specific inactivation of bacteria.
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Affiliation(s)
- Min Young Song
- Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Jongsoo Jurng
- Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea; Department of Energy and Environmental Engineering, University of Science and Technology (UST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoulsiripdae-ro 163, Dongdaemun-gu, Seoul 02504, Republic of Korea
| | - Byoung Chan Kim
- Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea; Department of Energy and Environmental Engineering, University of Science and Technology (UST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea.
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37
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Unique Properties of Core Shell Ag@Au Nanoparticles for the Aptasensing of Bacterial Cells. CHEMOSENSORS 2016. [DOI: 10.3390/chemosensors4030016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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38
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Systematic review of in vivo microorganisms imaging with labeled vitamins, bacteriophages and oligomers. Clin Transl Imaging 2016. [DOI: 10.1007/s40336-016-0182-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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39
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Karaballi RA, Nel A, Krishnan S, Blackburn J, Brosseau CL. Development of an electrochemical surface-enhanced Raman spectroscopy (EC-SERS) aptasensor for direct detection of DNA hybridization. Phys Chem Chem Phys 2016; 17:21356-63. [PMID: 25780805 DOI: 10.1039/c4cp05077k] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Rapid detection of disease biomarkers at the patient point-of-care is essential to timely and effective treatment. The research described herein focuses on the development of an electrochemical surface-enhanced Raman spectroscopy (EC-SERS) DNA aptasensor capable of direct detection of tuberculosis (TB) DNA. Specifically, a plausible DNA biomarker present in TB patient urine was chosen as the model target for detection. Cost-effective screen printed electrodes (SPEs) modified with silver nanoparticles (AgNP) were used as the aptasensor platform, onto which the aptamer specific for the target DNA was immobilized. Direct detection of the target DNA was demonstrated through the appearance of SERS peaks characteristic for adenine, present only in the target strand. Modulation of the applied potential allowed for a sizeable increase in the observed SERS response and the use of thiol back-filling prevented non-specific adsorption of non-target DNA. To our knowledge, this work represents the first EC-SERS study of an aptasensor for the direct, label-free detection of DNA hybridization. Such a technology paves the way for rapid detection of disease biomarkers at the patient point-of-care.
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Affiliation(s)
- R A Karaballi
- Department of Chemistry, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada.
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41
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Marton S, Cleto F, Krieger MA, Cardoso J. Isolation of an Aptamer that Binds Specifically to E. coli. PLoS One 2016; 11:e0153637. [PMID: 27104834 PMCID: PMC4841571 DOI: 10.1371/journal.pone.0153637] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 04/01/2016] [Indexed: 01/24/2023] Open
Abstract
Escherichia coli is a bacterial species found ubiquitously in the intestinal flora of animals, although pathogenic variants cause major public health problems. Aptamers are short oligonucleotides that bind to targets with high affinity and specificity, and have great potential for use in diagnostics and therapy. We used cell-based Systematic Evolution of Ligands by EXponential enrichment (cell-SELEX) to isolate four single stranded DNA (ssDNA) aptamers that bind strongly to E. coli cells (ATCC generic strain 25922), with Kd values in the nanomolar range. Fluorescently labeled aptamers label the surface of E. coli cells, as viewed by fluorescent microscopy. Specificity tests with twelve different bacterial species showed that one of the aptamers–called P12-31—is highly specific for E. coli. Importantly, this aptamer binds to Meningitis/sepsis associated E. coli (MNEC) clinical isolates, and is the first aptamer described with potential for use in the diagnosis of MNEC-borne pathologies.
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Affiliation(s)
- Soledad Marton
- Instituto de Biologia Molecular do Paraná, Department of Research and Development, 3375 Professor Algacyr Munhoz Mader Street, Curitiba, Brazil
| | - Fernanda Cleto
- Instituto de Biologia Molecular do Paraná, Department of Research and Development, 3375 Professor Algacyr Munhoz Mader Street, Curitiba, Brazil
| | - Marco Aurélio Krieger
- Instituto de Biologia Molecular do Paraná, Department of Research and Development, 3375 Professor Algacyr Munhoz Mader Street, Curitiba, Brazil.,Instituto Carlos Chagas, Laboratório de Genomica Functional, 3375 Professor Algacyr Munhoz Mader Street, Curitiba, Brazil
| | - Josiane Cardoso
- Instituto de Biologia Molecular do Paraná, Department of Research and Development, 3375 Professor Algacyr Munhoz Mader Street, Curitiba, Brazil
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42
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Aptamer-based 'point-of-care testing'. Biotechnol Adv 2016; 34:198-208. [PMID: 26876017 DOI: 10.1016/j.biotechadv.2016.02.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 02/06/2016] [Accepted: 02/07/2016] [Indexed: 12/13/2022]
Abstract
Aptamers are single-stranded oligonucleotides that can be artificially generated by a method called Systematic evolution of ligands by exponential enrichment (SELEX). The generated aptamers have been assessed for high-performance sensing applications due to their appealing characteristics. With either aptamers alone or complementing with antibodies, several high sensitive and portable sensors have been demonstrated for use in 'point-of-care testing'. Due to their high suitability and flexibility, aptamers are conjugated with nanostructures and utilized in field applications. Moreover, aptamers are more amenable to chemical modifications, making them capable of utilization with most developed sensors. In this overview, we discuss novel, portable, and aptamer-based sensing strategies that are suitable for 'point-of-care testing'.
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Chang CC, Chen CY, Chuang TL, Wu TH, Wei SC, Liao H, Lin CW. Aptamer-based colorimetric detection of proteins using a branched DNA cascade amplification strategy and unmodified gold nanoparticles. Biosens Bioelectron 2015; 78:200-205. [PMID: 26609945 DOI: 10.1016/j.bios.2015.11.051] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 11/15/2015] [Accepted: 11/17/2015] [Indexed: 12/22/2022]
Abstract
A branched DNA amplification strategy was employed to design a colorimetric aptameric biosensor using unmodified gold nanoparticles (AuNPs). First, a programmed DNA dendritic nanostructure was formed using two double-stranded substrate DNAs and two single-stranded auxiliary DNAs as assembly components via a target-assisted cascade amplification reaction, and it was then captured by DNA sensing probe-stabilized AuNPs. The release of sensing probes from AuNPs led to the formation of unstable AuNPs, promoting salt-induced aggregation. By integrating the signal amplification capacity of the branched DNA cascade reaction and unmodified AuNPs as a sensing indicator, this amplified colorimetric sensing strategy allows protein detection with high sensitivity (at the femtomole level) and selectivity. The limit of detection of this approach for VEGF was lower than those of other aptamer-based detection methods. Moreover, this assay provides modification-free and enzyme-free protein detection without sophisticated instrumentation and might be generally applicable to the detection of other protein targets in the future.
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Affiliation(s)
- Chia-Chen Chang
- Institute of Biomedical Engineering, National Taiwan University, Taipei 106, Taiwan, ROC
| | - Chen-Yu Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei 104, Taiwan, ROC; Department of Medicine, Mackay Medical College, Taipei 252, Taiwan, ROC; Mackay Junior College of Medicine, Nursing, and Management, Taipei 112, Taiwan, ROC
| | - Tsung-Liang Chuang
- Institute of Biomedical Engineering, National Taiwan University, Taipei 106, Taiwan, ROC
| | - Tzu-Heng Wu
- Institute of Biomedical Electronic and Bioinformatics, National Taiwan University, Taipei 106, Taiwan, ROC
| | - Shu-Chen Wei
- Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, Taipei 100, Taiwan, ROC
| | - Hongen Liao
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing 100084, PR China
| | - Chii-Wann Lin
- Institute of Biomedical Engineering, National Taiwan University, Taipei 106, Taiwan, ROC; Institute of Biomedical Electronic and Bioinformatics, National Taiwan University, Taipei 106, Taiwan, ROC; Center for Emerging Material and Advanced Devices, National Taiwan University, Taipei 106, Taiwan, ROC.
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Jiang H, Jelinek R. Hierarchical Assembly of Polydiacetylene Microtube Biosensors Mediated by Divalent Metal Ions. Chempluschem 2015; 81:119-124. [DOI: 10.1002/cplu.201500405] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 10/07/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Hao Jiang
- Department of Chemistry and Ilse Katz Institute for Nanotechnology; Ben Gurion University of the Negev; Beer Sheva 84105 Israel
| | - Raz Jelinek
- Department of Chemistry and Ilse Katz Institute for Nanotechnology; Ben Gurion University of the Negev; Beer Sheva 84105 Israel
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45
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Kong W, Xiong J, Yue H, Fu Z. Sandwich Fluorimetric Method for Specific Detection of Staphylococcus aureus Based on Antibiotic-Affinity Strategy. Anal Chem 2015; 87:9864-8. [DOI: 10.1021/acs.analchem.5b02301] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Weijun Kong
- Key Laboratory of Luminescence
and Real-Time Analytical Chemistry (Ministry of Education), College
of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China
| | - Jie Xiong
- Key Laboratory of Luminescence
and Real-Time Analytical Chemistry (Ministry of Education), College
of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China
| | - Huan Yue
- Key Laboratory of Luminescence
and Real-Time Analytical Chemistry (Ministry of Education), College
of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China
| | - Zhifeng Fu
- Key Laboratory of Luminescence
and Real-Time Analytical Chemistry (Ministry of Education), College
of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China
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Zhang H, Ma X, Liu Y, Duan N, Wu S, Wang Z, Xu B. Gold nanoparticles enhanced SERS aptasensor for the simultaneous detection of Salmonella typhimurium and Staphylococcus aureus. Biosens Bioelectron 2015; 74:872-7. [PMID: 26241735 DOI: 10.1016/j.bios.2015.07.033] [Citation(s) in RCA: 181] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 07/01/2015] [Accepted: 07/15/2015] [Indexed: 12/23/2022]
Abstract
Salmonella typhimurium and Staphylococcus aureus are most common causes of food-associated disease. A Raman based biosensor was developed for S. typhimurium and S. aureus detection simultaneously. The biosensor was based on nanoparticles enhanced Raman intensity and the specific recognition of aptamer. The Raman signal probe and the capture probe are built. Gold nanoparticles (GNPs) modified with Raman molecules (Mercaptobenzoic acid and 5,5'-Dithiobis(2-nitrobenzoic acid)) and aptamer are used as the signal probe for S. typhimurium and S. aureus, respectively. Fe3O4 magnetic gold nanoparticles (MGNPs) immobilized with both aptamer of S. typhimurium and S. aureus are used as the capture probe. When S. typhimurium and S. aureus are added in the reaction system, the capture probe will capture the target bacteria through the specific binding effect of aptamer. And then the signal probe will be connected to the bacteria also by the effect of aptamer to form the sandwich like detection structure. The Raman intensified spectrum was measured to quantify S. typhimurium and S. aureus. Under optimal conditions, the SERS intensity of MBA at 1582 cm(-1) are used to measure S. typhimurium (y=186.4762+704.8571x, R(2)=0.9921) and the SERS intensity of DNTB at 1333 cm(-1) are used to measure S. aureus (y=135.2381+211.4286x, R(2)=0.9946) in the range of 10(2)-10(7) cfu mL(-1). The LOD is 35 cfu mL(-1) for S. aureus and 15 cfu mL(-1) for S. typhimurium. This method is simple and rapid, results in high sensitivity and specificity, and can be used to detect actual samples.
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Affiliation(s)
- Hui Zhang
- China Rural Technology Development Center, Beijing 100045, China
| | - Xiaoyuan Ma
- 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
| | - Ying Liu
- 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
| | - 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
| | - 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
| | - 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.
| | - Baocai Xu
- State Key Lab Meat Processing & Quality Control, Yurun Group, Nanjing 210041, Jiangsu, China
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Single-Stranded DNA Aptamers against Pathogens and Toxins: Identification and Biosensing Applications. BIOMED RESEARCH INTERNATIONAL 2015. [PMID: 26199940 PMCID: PMC4493287 DOI: 10.1155/2015/419318] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Molecular recognition elements (MREs) can be short sequences of single-stranded DNA, RNA, small peptides, or antibody fragments. They can bind to user-defined targets with high affinity and specificity. There has been an increasing interest in the identification and application of nucleic acid molecular recognition elements, commonly known as aptamers, since they were first described in 1990 by the Gold and Szostak laboratories. A large number of target specific nucleic acids MREs and their applications are currently in the literature. This review first describes the general methodologies used in identifying single-stranded DNA (ssDNA) aptamers. It then summarizes advancements in the identification and biosensing application of ssDNA aptamers specific for bacteria, viruses, their associated molecules, and selected chemical toxins. Lastly, an overview of the basic principles of ssDNA aptamer-based biosensors is discussed.
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Liu X, Yang Y, Hua X, Feng X, Su S, Huang Y, Fan Q, Wang L, Huang W. An Improved Turn-On Aptasensor for Thrombin Detection Using Split Aptamer Fragments and Graphene Oxide. CHINESE J CHEM 2015. [DOI: 10.1002/cjoc.201500123] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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49
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Highly amplified detection of visceral adipose tissue-derived serpin (vaspin) using a cognate aptamer duo. Biosens Bioelectron 2015; 70:261-7. [PMID: 25829224 DOI: 10.1016/j.bios.2015.03.042] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 03/16/2015] [Accepted: 03/19/2015] [Indexed: 12/20/2022]
Abstract
A cognate aptamer duo for visceral adipose tissue-derived serpin (vaspin) which distinctively bind to two different sites on vaspin with high affinity and specificity were successfully developed by using graphene oxide-based systematic evolution of ligands by exponential enrichment (GO-SELEX), which offers immobilization-free screening of aptamers. The specific and simultaneous bindings of this aptamer duo (V1 and V49 aptamers) to the different sites of vaspin were confirmed by circular dichroism (CD) analysis and both sandwich-type surface plasmon resonance (SPR) and quantum dot labelled fluorescence imaging analysis (V1 aptamer serves as primary capturing aptamer and V49 aptamer as secondary signalling aptamer or vice versa). With this vaspin cognate aptamer duo on SPR platform, the detection of the target vaspin were improved to the limit of detection down to 3.5 ng/ml in buffer and 4.7 ng/ml in human serum samples. This cognate aptamer duo based biosensor could be utilized in the early diagnosis of type-2 diabetes.
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Zhao F, Xie Q, Xu M, Wang S, Zhou J, Liu F. RNA aptamer based electrochemical biosensor for sensitive and selective detection of cAMP. Biosens Bioelectron 2014; 66:238-43. [PMID: 25437358 DOI: 10.1016/j.bios.2014.11.024] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 11/11/2014] [Accepted: 11/14/2014] [Indexed: 01/26/2023]
Abstract
Cyclic adenosine monophosphate (cAMP) is an important small biological molecule associated with the healthy state of living organism. In order to realize highly sensitive and specific detection of cAMP, here an RNA aptamer and electrochemical impedance spectroscopy (EIS) based biosensor enhanced by gold nanoparticles electrodeposited on the surface of gold electrode is designed. The designed aptasensor has a wide effective measuring range from 50pM to 250pM with a detection limit of 50pM in PBS buffer, and an effective measuring range from 50nM to 1μM with a detection limit of 50nM in serum. The designed biosensor is also able to detect cAMP with high sensitivity, specificity, and stability. Since the biosensor can be easily fabricated with low cost and repeatedly used for at least two times, it owns great potential in wide application fields such as clinical test and food inspection, etc.
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Affiliation(s)
- Fulin Zhao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Qingyun Xie
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Mingfei Xu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Shouyu Wang
- Department of Information Physics and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
| | - Jiyong Zhou
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Fei Liu
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China.
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