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Pan T, Guo X, Yang D, Ding J, Chen C. Expression and significance of procalcitonin, leukotriene B4, serum amyloid A, and C-reactive protein in children with different types of pneumonia: An observational study. Medicine (Baltimore) 2024; 103:e37817. [PMID: 38728486 PMCID: PMC11081565 DOI: 10.1097/md.0000000000037817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 03/15/2024] [Indexed: 05/12/2024] Open
Abstract
This study aimed to investigate the expression and significance of serum procalcitonin (PCT), leukotriene B4 (LTB4), Serum amyloid A (SAA), and C-reactive protein (CRP) in children with different types of pneumonia caused by different pathogenic infections. One hundred and one children with pneumonia admitted to The Fifth People Hospital of Zhuhai from July 2019 to June 2020 were enrolled and divided into 38 cases in the bacterial group, 30 cases in the mycoplasma group, and 33 cases in the virus group according to the different types of pathogens. The patients were divided into 42 cases in the noncritical group, 33 cases in the critical group, and 26 cases in the very critical group according to the pediatric clinical illness score (PCIS), and 30 healthy children were selected as the control group during the same period. Comparison of serum PCT, SAA: bacterial group > mycoplasma group > viral group > control group with significant differences (P < .05). Receiver operator characteristic (ROC) analysis showed that the area under the curves (AUCs) of serum PCT, LTB4, SAA, and CRP for the diagnosis of bacterial pneumonia were 1.000, 0.531, 0.969, and 0.833, respectively, and the AUCs for the diagnosis of mycoplasma pneumonia were 0.653, 0.609, 0.547, and 0.652, respectively, and the AUCs for the diagnosis of viral pneumonia were 0.888, 0.570, 0.955, and 1.000, respectively. Comparison of serum PCT, LTB4, SAA: very critical group > critical group > noncritical group > control group, with significant differences (P < .05). Serum PCT, LTB4, and SAA were negatively correlated with PCIS score by Pearson analysis (P < .05). Serum PCT and SAA showed diagnostic value for bacterial pneumonia, and serum SAA and CRP showed diagnostic value for viral pneumonia; serum PCT, LTB4, and SAA correlate with severity of disease and show higher expression with worsening of the condition.
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Affiliation(s)
- Tinghui Pan
- Department of Paediatrics, The Fifth People’s Hospital of Zhuhai, Zhuhai, Guangdong, China
| | - Xiwen Guo
- Department of Human Anatomy and Histology & Embryology, Zunyi Medical University, Zhuhai Campus, Zhuhai, Guangdong, China
| | - Dehui Yang
- Department of Paediatrics, The Fifth People’s Hospital of Zhuhai, Zhuhai, Guangdong, China
| | - Jundong Ding
- Department of Paediatrics, The Fifth People’s Hospital of Zhuhai, Zhuhai, Guangdong, China
| | - Chengxian Chen
- Department of Neuromedicine, Guangdong Women and Children Hospital, Guangzhou, Guangdong, China
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2
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Kramat J, Kraus L, Gunawan VJ, Smyej E, Froehlich P, Weber TE, Spiehl D, Koeppl H, Blaeser A, Suess B. Sensing Levofloxacin with an RNA Aptamer as a Bioreceptor. BIOSENSORS 2024; 14:56. [PMID: 38275309 PMCID: PMC10813692 DOI: 10.3390/bios14010056] [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: 12/07/2023] [Revised: 01/11/2024] [Accepted: 01/12/2024] [Indexed: 01/27/2024]
Abstract
To combat the growing threat of antibiotic resistance, environmental testing for antibiotic contamination is gaining an increasing role. This study aims to develop an easy-to-use assay for the detection of the fluoroquinolone antibiotic levofloxacin. Levofloxacin is used in human and veterinary medicine and has been detected in wastewater and river water. An RNA aptamer against levofloxacin was selected using RNA Capture-SELEX. The 73 nt long aptamer folds into three stems with a central three-way junction. It binds levofloxacin with a Kd of 6 µM and discriminates the closely related compound ciprofloxacin. Furthermore, the selection process was analyzed using a next-generation sequencing approach to better understand the sequence evolution throughout the selection. The aptamer was used as a bioreceptor for the development of a lateral flow assay. The biosensor exploited the innate characteristic of RNA Capture-SELEX to select aptamers that displace a complementary DNA oligonucleotide upon ligand binding. The lateral flow assay achieved a limit of visual detection of 100 µM. While the sensitivity of this assay constrains its immediate use in environmental testing, the present study can serve as a template for the selection of RNA aptamer-based biosensors.
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Affiliation(s)
- Janice Kramat
- Synthetic RNA Biology, Department of Biology, Technical University of Darmstadt, 64287 Darmstadt, Germany
| | - Leon Kraus
- Synthetic RNA Biology, Department of Biology, Technical University of Darmstadt, 64287 Darmstadt, Germany
| | - Vincent J. Gunawan
- Synthetic RNA Biology, Department of Biology, Technical University of Darmstadt, 64287 Darmstadt, Germany
| | - Elias Smyej
- Synthetic RNA Biology, Department of Biology, Technical University of Darmstadt, 64287 Darmstadt, Germany
| | - Philipp Froehlich
- Self-Organizing Systems, Department of Electrical Engineering and Information Technology, Technical University of Darmstadt, 64283 Darmstadt, Germany
| | - Tim E. Weber
- Institute for BioMedical Printing Technologies, Technical University of Darmstadt, 64289 Darmstadt, Germany
| | - Dieter Spiehl
- Institute for BioMedical Printing Technologies, Technical University of Darmstadt, 64289 Darmstadt, Germany
- Centre for Synthetic Biology, Technical University of Darmstadt, 64289 Darmstadt, Germany
| | - Heinz Koeppl
- Self-Organizing Systems, Department of Electrical Engineering and Information Technology, Technical University of Darmstadt, 64283 Darmstadt, Germany
- Centre for Synthetic Biology, Technical University of Darmstadt, 64289 Darmstadt, Germany
| | - Andreas Blaeser
- Institute for BioMedical Printing Technologies, Technical University of Darmstadt, 64289 Darmstadt, Germany
- Centre for Synthetic Biology, Technical University of Darmstadt, 64289 Darmstadt, Germany
| | - Beatrix Suess
- Synthetic RNA Biology, Department of Biology, Technical University of Darmstadt, 64287 Darmstadt, Germany
- Centre for Synthetic Biology, Technical University of Darmstadt, 64289 Darmstadt, Germany
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Hakimian F, Mazloum-Ardakani M. Ag nanorod@PEI-Ag nanohybrid as an excellent signal label for sensitive and rapid detection of serum HER2. Sci Rep 2023; 13:21792. [PMID: 38066021 PMCID: PMC10709618 DOI: 10.1038/s41598-023-48838-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 11/30/2023] [Indexed: 12/18/2023] Open
Abstract
The accurate detection of Human epidermal growth factor receptor-2 (HER2) as a critical breast cancer biomarker can be essential for the early selection of therapeutic approaches. HER2 is a prominent component of a signaling network. Overexpression of the HER2 protein due to amplification of its gene leads to the development of an aggressive subtype of breast cancer. Patients with tumors that overexpress HER2 are eligible for treatment that significantly reduces mortality rates. Herein, we present a fast and simple method for detecting serum HER2. A new electrochemical label has been developed using charged Ag nanorod@ polyethylenimine-Ag (Ag NR@ PEI-Ag) nanohybrid. The synthesized Ag NR@PEI-Ag nanohybrid simultaneously has the electroactive property of silver and the large surface area of the PEI, which results in the enhancement of the detection signal. So, using Ag NR@PEI-Ag nanohybrid as the electrochemical label, a simple, fast, and sensitive electrochemical biosensor was designed to detect HER2. This way, after immobilizing HER2 aptamer on the Au electrode surface, HER2 or human serum was exposed to the aptamer. Then, the positively charged Ag NR@PEI-Ag nanohybrid was adsorbed onto the negatively charged aptamer-HER2 complex, and the current that was produced due to the Ag/AgCl reaction was measured as the electrochemical signal. The aptasensor shows a broad linear response from 10-12 to 10-7 g, a low detection limit (LOD) of 10 pg, and a total assay time of ~ 30 min.
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Affiliation(s)
- Fatemeh Hakimian
- Department of Chemistry, Faculty of Science, Yazd University, Yazd, 89195-741, Iran
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Hong J, Su M, Zhao K, Zhou Y, Wang J, Zhou SF, Lin X. A Minireview for Recent Development of Nanomaterial-Based Detection of Antibiotics. BIOSENSORS 2023; 13:327. [PMID: 36979539 PMCID: PMC10046170 DOI: 10.3390/bios13030327] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 02/17/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
Antibiotics are considered a new type of organic pollutant. Antibiotic residues have become a global issue due to their harm to human health. As the use of antibiotics is increasing in human life, such as in medicine, crops, livestock, and even drinking water, the accurate analysis of antibiotics is very vital. In order to develop rapid and on-site approaches for the detection of antibiotics and the analysis of trace-level residual antibiotics, a high-sensitivity, simple, and portable solution is required. Meanwhile, the rapid nanotechnology development of a variety of nanomaterials has been achieved. In this review, nanomaterial-based techniques for antibiotic detection are discussed, and some reports that have employed combined nanomaterials with optical techniques or electrochemical techniques are highlighted.
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Affiliation(s)
- Jiafu Hong
- Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Xiamen 361101, China
| | - Mengxing Su
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Xiamen 361101, China
| | - Kunmeng Zhao
- Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
| | - Yihui Zhou
- Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
| | - Jingjing Wang
- State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Xiamen 361101, China
| | - Shu-Feng Zhou
- Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
| | - Xuexia Lin
- Department of Chemical Engineering & Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
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Wei X, Liu C, Qin H, Ye Z, Liu X, Zong B, Li Z, Mao S. Fast, specific, and ultrasensitive antibiotic residue detection by monolayer WS 2-based field-effect transistor sensor. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130299. [PMID: 36356526 DOI: 10.1016/j.jhazmat.2022.130299] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 10/16/2022] [Accepted: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Antibiotic residues cause increasing concern in environmental ecology and public health, which needs efficient analysis strategy for monitoring and control. In this study, a fast, specific, and ultrasensitive sensor based on field-effect transistor (FET) has been proposed for the detection of ampicillin (AMP). The sensor involves monolayer tungsten disulfide (WS2) nanosheet as the sensing channel, single-stranded DNA (ssDNA) as the sensing probe, and gold nanoparticle (Au NP) as the linker. The WS2/Au/ssDNA FET sensor responds rapidly to AMP in a wide linear detection range (10-12-10-6 M) and has low limit of detection (0.556 pM), which meets the permissible standards of AMP in water and food. The sensing mechanism study suggests that the excellent sensor response results from the increased number of negative charges in the Debye length and the consequent accumulation of holes in WS2 channel after the addition of AMP. Moreover, satisfactory sensing performance was confirmed in real water samples, indicating the potential application of the proposed method in practical AMP detection. The reported FET sensing strategy provides new insights in antibiotic analysis for risk assessment and control.
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Affiliation(s)
- Xiaojie Wei
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Chengbin Liu
- Institute for Agri-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Hehe Qin
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Ziwei Ye
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Xinru Liu
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Boyang Zong
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Zhuo Li
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Shun Mao
- College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
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6
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Cai R, Chen X, Zhang Y, Wang X, Zhou N. Systematic bio-fabrication of aptamers and their applications in engineering biology. SYSTEMS MICROBIOLOGY AND BIOMANUFACTURING 2022; 3:223-245. [PMID: 38013802 PMCID: PMC9550155 DOI: 10.1007/s43393-022-00140-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 10/27/2022]
Abstract
Aptamers are single-stranded DNA or RNA molecules that have high affinity and selectivity to bind to specific targets. Compared to antibodies, aptamers are easy to in vitro synthesize with low cost, and exhibit excellent thermal stability and programmability. With these features, aptamers have been widely used in biology and medicine-related fields. In the meantime, a variety of systematic evolution of ligands by exponential enrichment (SELEX) technologies have been developed to screen aptamers for various targets. According to the characteristics of targets, customizing appropriate SELEX technology and post-SELEX optimization helps to obtain ideal aptamers with high affinity and specificity. In this review, we first summarize the latest research on the systematic bio-fabrication of aptamers, including various SELEX technologies, post-SELEX optimization, and aptamer modification technology. These procedures not only help to gain the aptamer sequences but also provide insights into the relationship between structure and function of the aptamers. The latter provides a new perspective for the systems bio-fabrication of aptamers. Furthermore, on this basis, we review the applications of aptamers, particularly in the fields of engineering biology, including industrial biotechnology, medical and health engineering, and environmental and food safety monitoring. And the encountered challenges and prospects are discussed, providing an outlook for the future development of aptamers.
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Affiliation(s)
- Rongfeng Cai
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122 China
| | - Xin Chen
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122 China
| | - Yuting Zhang
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122 China
| | - Xiaoli Wang
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122 China
| | - Nandi Zhou
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122 China
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7
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Preparation and Validation of Ultra-sensitive Aptamers by Computer Simulation and Site-Specific Mutation. FOOD ANAL METHOD 2022. [DOI: 10.1007/s12161-022-02396-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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8
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Banu K, Mondal B, Rai B, Monica N, Hanumegowda R. Prospects for the application of aptamer based assay platforms in pathogen detection. Biocybern Biomed Eng 2022. [DOI: 10.1016/j.bbe.2022.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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The use of high-affinity polyhistidine binders as masking probes for the selection of an NDM-1 specific aptamer. Sci Rep 2022; 12:7936. [PMID: 35562409 PMCID: PMC9106695 DOI: 10.1038/s41598-022-12062-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 05/04/2022] [Indexed: 12/02/2022] Open
Abstract
The emergence of carbapenemase-producing multi-drug resistant Enterobacteriaceae poses a dramatic, world-wide health risk. Limited treatment options and a lack of easy-to-use methods for the detection of infections with multi-drug resistant bacteria leave the health-care system with a fast-growing challenge. Aptamers are single stranded DNA or RNA molecules that bind to their targets with high affinity and specificity and can therefore serve as outstanding detection probes. However, an effective aptamer selection process is often hampered by non-specific binding. When selections are carried out against recombinant proteins, purification tags (e.g. polyhistidine) serve as attractive side targets, which may impede protein target binding. In this study, aptamer selection was carried out against N-terminally hexa-histidine tagged New Delhi metallo-ß-lactamase 1. After 14 selection rounds binding to polyhistidine was detected rather than to New Delhi metallo-ß-lactamase 1. Hence, the selection strategy was changed. As one aptamer candidate showed remarkable binding affinity to polyhistidine, it was used as a masking probe and selection was restarted from selection round 10. Finally, after three consecutive selection rounds, an aptamer with specific binding properties to New Delhi metallo-ß-lactamase 1 was identified. This aptamer may serve as a much-needed detection probe for New Delhi metallo-ß-lactamase 1 expressing Enterobacteriaceae.
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10
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Trinh KH, Kadam US, Rampogu S, Cho Y, Yang KA, Kang CH, Lee KW, Lee KO, Chung WS, Hong JC. Development of novel fluorescence-based and label-free noncanonical G4-quadruplex-like DNA biosensor for facile, specific, and ultrasensitive detection of fipronil. JOURNAL OF HAZARDOUS MATERIALS 2022; 427:127939. [PMID: 34893377 DOI: 10.1016/j.jhazmat.2021.127939] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 06/14/2023]
Abstract
Fipronil is a broad-spectrum insecticide widely used in agriculture and residential areas; its indiscriminate use leads to environmental pollution and poses health hazards. Early detection of fipronil is critical to prevent the deleterious effects. However, current insecticide analysis methods such as HPLC, LC/MS, and GC/MS are incompetent; they are costly, immobile, time-consuming, laborious, and need skilled technicians. Hence, a sensitive, specific, and cheap biosensor are essential to containing the contamination. Here, we designed two novel biosensors-the first design relied on fluorescent labeling/quenching, while the second sensor focused on label-free detection using Thioflavin T displacement. Altogether, we identified four candidate aptamers, predicted secondary structures, and performed 3D molecular modeling to predict the binding pocket of fipronil in FiPA6B aptamer. Furthermore, the aptameric sensors showed high sensitivity to fipronil of sub-ppb level LOD, attributed to stringent experimental design. The biosensors displayed high specificity against other phenylpyrazole insecticides and demonstrated robust sensitivity for fipronil in real samples like cabbage and cucumber. Notably, to the best of our knowledge, this is the first demonstration of noncanonical G4-quadruplex-like aptamer binding to fipronil, verified using CD spectroscopy. Such aptasensors possess considerable potential for real-time measurements of hazardous insecticides as point-of-care technology.
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Affiliation(s)
- Kien Hong Trinh
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Division of Life Science and Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Faculty of Biotechnology, Vietnam National University of Agriculture, Hanoi City 12400, Vietnam
| | - Ulhas Sopanrao Kadam
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Division of Life Science and Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea
| | - Shailima Rampogu
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Division of Life Science and Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea
| | - Yuhan Cho
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Division of Life Science and Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea
| | - Kyung-Ae Yang
- Department of Medicine, Columbia University, New York, NY 10032, USA
| | - Chang Ho Kang
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Division of Life Science and Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea
| | - Keun-Woo Lee
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Division of Life Science and Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea
| | - Kyun Oh Lee
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Division of Life Science and Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea
| | - Woo Sik Chung
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Division of Life Science and Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea
| | - Jong Chan Hong
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Division of Life Science and Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea; Division of Plant Sciences, University of Missouri, Columbia, Missouri, MO 65211, USA.
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11
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Wang J, Zhu L, Li T, Li X, Huang K, Xu W. Multiple functionalities of functional nucleic acids for developing high-performance lateral flow assays. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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12
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Iles AH, He PJW, Katis IN, Galanis PP, John AJUK, Elkington P, Eason RW, Sones CL. Semi-quantitative detection of inflammatory biomarkers using a laser-patterned multiplexed lateral flow device. Talanta 2022; 237:122944. [PMID: 34736671 DOI: 10.1016/j.talanta.2021.122944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/01/2021] [Accepted: 10/07/2021] [Indexed: 01/17/2023]
Abstract
Inflammatory markers including C-reactive protein (CRP) and procalcitonin (PCT) have been shown to be useful biomarkers to improve triage speed and prevent the inappropriate use of antibiotics for infections such as pneumonia. Here, we present a novel and exciting solution to guide the administration of antibiotic treatment via rapid, semi-quantitative and multiplexed detection of CRP and PCT using an advanced lateral flow device (LFD) designed to have multiple parallel flow-paths, produced via the precise laser-based partitioning of the single flow-path of a standard LFD. Each flow-path within this multiplexed LFD has a unique detection capability which permits tailored detection of CRP within a predefined cut-off range (20 μg/mL - 100 μg/mL) and PCT above a pre-defined threshold (0.5 ng/mL). We demonstrate the use of this LFD in the successful detection of CRP and PCT semi-quantitatively within spiked human serum samples. This multiplexed near-patient assay has potential for development into a rapid triage and treatment of patients with suspected pneumonia.
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Affiliation(s)
- Alice H Iles
- Optoelectronics Research Centre, University of Southampton, SO17 1BJ, UK.
| | - Peijun J W He
- Optoelectronics Research Centre, University of Southampton, SO17 1BJ, UK
| | - Ioannis N Katis
- Optoelectronics Research Centre, University of Southampton, SO17 1BJ, UK
| | | | - Anto J U K John
- Optoelectronics Research Centre, University of Southampton, SO17 1BJ, UK
| | - Paul Elkington
- NIHR Biomedical Research Centre, Faculty of Medicine, University of Southampton, SO16 6YD, UK
| | - Robert W Eason
- Optoelectronics Research Centre, University of Southampton, SO17 1BJ, UK
| | - Collin L Sones
- Optoelectronics Research Centre, University of Southampton, SO17 1BJ, UK
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Aptamer-Based Lateral Flow Assays: Current Trends in Clinical Diagnostic Rapid Tests. Pharmaceuticals (Basel) 2022; 15:ph15010090. [PMID: 35056148 PMCID: PMC8781427 DOI: 10.3390/ph15010090] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/09/2022] [Accepted: 01/10/2022] [Indexed: 12/18/2022] Open
Abstract
The lateral flow assay (LFA) is an extensively used paper-based platform for the rapid and on-site detection of different analytes. The method is user-friendly with no need for sophisticated operation and only includes adding sample. Generally, antibodies are employed as the biorecognition elements in the LFA. However, antibodies possess several disadvantages including poor stability, high batch-to-batch variation, long development time, high price and need for ethical approval and cold chain. Because of these limitations, aptamers screened by an in vitro process can be a good alternative to antibodies as biorecognition molecules in the LFA. In recent years, aptamer-based LFAs have been investigated for the detection of different analytes in point-of-care diagnostics. In this review, we summarize the applications of aptamer technology in LFAs in clinical diagnostic rapid tests for the detection of biomarkers, microbial analytes, hormones and antibiotics. Performance, advantages and drawbacks of the developed assays are also discussed.
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14
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Sardarabadi P, Kojabad AA, Jafari D, Liu CH. Liquid Biopsy-Based Biosensors for MRD Detection and Treatment Monitoring in Non-Small Cell Lung Cancer (NSCLC). BIOSENSORS 2021; 11:394. [PMID: 34677350 PMCID: PMC8533977 DOI: 10.3390/bios11100394] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/12/2021] [Accepted: 10/12/2021] [Indexed: 12/12/2022]
Abstract
Globally, non-small cell lung cancer (NSCLC) is the leading cause of cancer deaths. Despite advancements in chemotherapy and targeted therapies, the 5-year survival rate has remained at 16% for the past forty years. Minimal residual disease (MRD) is described as the existence of either isolated tumour cells or circulating tumour cells in biological liquid of patients after removal of the primary tumour without any clinical signs of cancer. Recently, liquid biopsy has been promising as a non-invasive method of disease monitoring and treatment guidelines as an MRD marker. Liquid biopsy could be used to detect and assess earlier stages of NSCLC, post-treatment MRD, resistance to targeted therapies, immune checkpoint inhibitors (ICIs) and tumour mutational burden. MRD surveillance has been proposed as a potential marker for lung cancer relapse. Principally, biosensors provide the quantitative analysis of various materials by converting biological functions into quantifiable signals. Biosensors are usually operated to detect antibodies, enzymes, DNA, RNA, extracellular vesicles (EVs) and whole cells. Here, we present a category of biosensors based on the signal transduction method for identifying biosensor-based biomarkers in liquid biopsy specimens to monitor lung cancer treatment.
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Affiliation(s)
- Parvaneh Sardarabadi
- Institute of Nanoengineering and Microsystems, National Tsing Hua University, Hsinchu 30044, Taiwan;
| | - Amir Asri Kojabad
- Department of Hematology, School of Allied Medical Sciences, Iran University of Medical Sciences, Tehran 14535, Iran;
| | - Davod Jafari
- Department of Medical Biotechnology, School of Allied Medicine, Iran University of Medical Sciences, Tehran 14535, Iran;
| | - Cheng-Hsien Liu
- Institute of Nanoengineering and Microsystems, National Tsing Hua University, Hsinchu 30044, Taiwan;
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30044, Taiwan
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15
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Advances in aptamer-based sensing assays for C-reactive protein. Anal Bioanal Chem 2021; 414:867-884. [PMID: 34581827 DOI: 10.1007/s00216-021-03674-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/13/2021] [Accepted: 09/16/2021] [Indexed: 12/28/2022]
Abstract
C-reactive protein (CRP), a non-specific acute-phase indicator of inflammation, has been widely recognized for its value in clinical diagnostic applications. With the advancement of testing technologies, there have been many reports on fast, simple, and reliable methods for CRP testing. Among these, the aptamer-based biosensors are the focus and hotspot of research for achieving high-sensitivity analysis of CRP. This review summarizes the progress of in vitro aptamer screening for CRP and the recent advances in aptamer-based CRP sensor applications, thus developing insight for the new CRP aptasensor design strategy.
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16
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MoS 2/PPy Nanocomposite as a Transducer for Electrochemical Aptasensor of Ampicillin in River Water. BIOSENSORS-BASEL 2021; 11:bios11090311. [PMID: 34562901 PMCID: PMC8466510 DOI: 10.3390/bios11090311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/24/2021] [Accepted: 08/27/2021] [Indexed: 11/16/2022]
Abstract
We report the design of an electrochemical aptasensor for ampicillin detection, which is an antibiotic widely used in agriculture and considered to be a water contaminant. We studied the transducing potential of nanostructure composed of MoS2 nanosheets and conductive polypyrrole nanoparticles (PPyNPs) cast on a screen-printed electrode. Fine chemistry is developed to build the biosensors entirely based on robust covalent immobilizations of naphthoquinone as a redox marker and the aptamer. The structural and morphological properties of the nanocomposite were studied by SEM, AFM, and FT-IR. High-resolution XPS measurements demonstrated the formation of a binding between the two nanomaterials and energy transfer affording the formation of heterostructure. Cyclic voltammetry and electrochemical impedance spectroscopy were used to analyze their electrocatalytic properties. We demonstrated that the nanocomposite formed with PPyNPs and MoS2 nanosheets has electro-catalytic properties and conductivity leading to a synergetic effect on the electrochemical redox process of the redox marker. Thus, a highly sensitive redox process was obtained that could follow the recognition process between the apatamer and the target. An amperometric variation of the naphthoquinone response was obtained regarding the ampicillin concentration with a limit of detection (LOD) of 10 pg/L (0.28 pM). A high selectivity towards other contaminants was demonstrated with this biosensor and the analysis of real river water samples without any treatment showed good recovery results thanks to the antifouling properties. This biosensor can be considered a promising device for the detection of antibiotics in the environment as a point-of-use system.
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17
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Ranjan S, Jain S, Bhargava A, Shandilya R, Srivastava RK, Mishra PK. Lateral flow assay-based detection of long non-coding RNAs: A point-of-care platform for cancer diagnosis. J Pharm Biomed Anal 2021; 204:114285. [PMID: 34333453 DOI: 10.1016/j.jpba.2021.114285] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 07/23/2021] [Accepted: 07/23/2021] [Indexed: 12/13/2022]
Abstract
Lateral flow assay (LFA) is a flexible, simple, low-costpoint-of-care platform for rapid detection of disease-specific biomarkers. Importantly, the ability of the assay to capture the circulating bio-molecules has gained significant attention, as it offers a potential minimal invasive system for early disease diagnosis and prognosis. In the present article, we review an innovative concept of LFA-based detection of circulating long non-coding RNAs (lncRNAs), one of the key regulators of fundamental biological processes. In addition, their disease-specific expression pattern and presence in biological fluids at differential levels make them excellent biomarker candidates for cancer detection. Our article also provides an update on the requirements for developing and improving such systems and discusses the key aspects of material selection, operational concepts, principles and conceptual design. We assume that the reviewed points will be helpful to improve the diagnostic applicability of LFA based lncRNA detection in cancer diagnosis.
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Affiliation(s)
- Shashi Ranjan
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Surbhi Jain
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Arpit Bhargava
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | - Ruchita Shandilya
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India
| | | | - Pradyumna Kumar Mishra
- Department of Molecular Biology, ICMR-National Institute for Research in Environmental Health, Bhopal, India.
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18
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Wang T, Chen L, Chikkanna A, Chen S, Brusius I, Sbuh N, Veedu RN. Development of nucleic acid aptamer-based lateral flow assays: A robust platform for cost-effective point-of-care diagnosis. Theranostics 2021; 11:5174-5196. [PMID: 33859741 PMCID: PMC8039946 DOI: 10.7150/thno.56471] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/29/2021] [Indexed: 02/07/2023] Open
Abstract
Lateral flow assay (LFA) has made a paradigm shift in the in vitro diagnosis field due to its rapid turnaround time, ease of operation and exceptional affordability. Currently used LFAs predominantly use antibodies. However, the high inter-batch variations, error margin and storage requirements of the conventional antibody-based LFAs significantly impede its applications. The recent progress in aptamer technology provides an opportunity to combine the potential of aptamer and LFA towards building a promising platform for highly efficient point-of-care device development. Over the past decades, different forms of aptamer-based LFAs have been introduced for broad applications ranging from disease diagnosis, agricultural industry to environmental sciences, especially for the detection of antibody-inaccessible small molecules such as toxins and heavy metals. But commercial aptamer-based LFAs are still not used widely compared with antibodies. In this work, by analysing the key issues of aptamer-based LFA design, including immobilization strategies, signalling methods, and target capturing approaches, we provide a comprehensive overview about aptamer-based LFA design strategies to facilitate researchers to develop optimised aptamer-based LFAs.
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Affiliation(s)
- Tao Wang
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
- Perron Institute for Neurological and Translational Science, Perth 6009, Australia
| | - Lanmei Chen
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
- Guangdong Key Laboratory for Research and Development of Nature Drugs, School of Pharmacy, Guangdong Medical University, Zhanjiang 524023, China
| | - Arpitha Chikkanna
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
| | - Suxiang Chen
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
| | - Isabell Brusius
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
| | - Nabayet Sbuh
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
| | - Rakesh N. Veedu
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
- Perron Institute for Neurological and Translational Science, Perth 6009, Australia
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19
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Lyu C, Khan IM, Wang Z. Capture-SELEX for aptamer selection: A short review. Talanta 2021; 229:122274. [PMID: 33838776 DOI: 10.1016/j.talanta.2021.122274] [Citation(s) in RCA: 97] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/26/2021] [Accepted: 03/01/2021] [Indexed: 12/18/2022]
Abstract
The emerging aptamer, developed through the systematic evolution of ligands by exponential enrichment (SELEX) process, has revolutionized and facilitated the discoveries in basic research. Among all SELEX technology, Capture-SELEX is a variant of the in vitro selection process, which is suitable for isolating aptamers against small molecules. Capture-SELEX library was developed to enable the immobilization of the oligonucleotides instead of the target molecules during the aptamer selection process. The review provides an update on the recent-advances in this new screening method with particular emphasis on key points of capture protocol and its applications. The limitations and the prospects of the Capture-SELEX are also discussed. We hope that present review will inspire more researchers to understand the selection problems from the perspective of Capture-SELEX. Moreover, it will open new pave to improve the efficiency and success of screening to meet the growing demand for aptasensor discovery in small molecules.
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Affiliation(s)
- Chen Lyu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China; School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Imran Mahmood Khan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China; School of Food Science and Technology, Jiangnan University, Wuxi, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, China; Synergetic Innovation Center of Food Safety and Quality Control of Jiangsu Province, China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China; School of Food Science and Technology, Jiangnan University, Wuxi, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, China; Synergetic Innovation Center of Food Safety and Quality Control of Jiangsu Province, China.
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20
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Berlina AN, Sotnikov DV, Komova NS, Zherdev AV, Dzantiev BB. Limitations for colorimetric aggregation assay of metal ions and ways of their overcoming. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:250-257. [PMID: 33355543 DOI: 10.1039/d0ay02068k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The development of analytical methods for the determination of metal ions in water is one of the priority tasks for efficient environmental monitoring. The use of modified gold nanoparticles and the colorimetric detection of their aggregation initiated by ions binding with specific receptors on the nanoparticle surface has high potential for simple testing. However, the limits of this approach and the parameters determining the assay sensitivity are not clear, and the possibilities of different assay formats are estimated only empirically. We have proposed a mathematical description of the aggregation processes in the assay and have estimated the detection limits of an aptamer-based assay of Pb2+ ions theoretically and experimentally. In the studied assay, gold nanoparticles modified with G,T-enriched aptamer were used, and their aggregation caused by the interaction with Pb2+ ions was controlled via a color change. The experimentally determined limit of Pb2+ detection was 700 ppb, which was in good agreement with theoretical calculations. An examination of the model showed that the limiting parameter of the assay is the binding constant of the aptamer-Pb2+ ion interaction. To overcome this limitation without searching for alternate receptors, two methods have been proposed, namely additional aggregation-causing components or centrifugation. These approaches lowered the detection limit to 150 ppb and even to 0.4 ppb. The second value accords with regulatory demands for the permissible levels of water source contamination, and the corresponding approach has significant competitive potential due to its rapidity, simple implementation, and the visual assessment of the assay results.
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Affiliation(s)
- Anna N Berlina
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russia.
| | - Dmitry V Sotnikov
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russia.
| | - Nadezhda S Komova
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russia.
| | - Anatoly V Zherdev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russia.
| | - Boris B Dzantiev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russia.
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21
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Díaz-Amaya S, Zhao M, Allebach JP, Chiu GTC, Stanciu LA. Ionic Strength Influences on Biofunctional Au-Decorated Microparticles for Enhanced Performance in Multiplexed Colorimetric Sensors. ACS APPLIED MATERIALS & INTERFACES 2020; 12:32397-32409. [PMID: 32645268 DOI: 10.1021/acsami.0c07636] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The rising development of biosensors offers a great potential for health, food, and environmental monitoring. However, in many colorimetric platforms, there is a performance limitation stemming from the tendency of traditional Au nanoparticles toward nonspecific aggregation in response to changing ionic strength (salt concentration). This work puts forward a new type of colorimetric aptamer-functionalized labeling of microparticles, which allows to leverage an increase in ionic strength as a positive driver of enhanced detection performance of analytical targets. The resulting device is a cost-effective, instrument-free, portable, and reliable aptasensor that serves as basis for the fabrication of universal paper-based colorimetric platforms with the capability of multiplex, multireplicates and provides quantitative colorimetric detection. A controlled fabrication process was demonstrated by keeping 90% of the signal obtained from the as-fabricated devices (n = 40) within ± 1 standard deviation (SD) (relative SD = 5.69%) and following a mesokurtic normal-like distribution (p = 0.385). We propose for the first time a salt-induced aggregation mechanism for highly stable multilayered label particles (ssDNA-PEI-Au-PS) as the basis of the detection scheme. The use of DNA aptamers as capture biomolecules and PEI as an encapsulating agent allows for a sensitive and highly specific colorimetric response. As a proof of concept, multiplexed detection of mercury (Hg2+) and arsenic (As3+) was demonstrated. In addition, we introduced a robust image analysis algorithm for testing zone segmentation and color signal quantification that allowed for analytical detection, reaching a limit of detection of 1 ppm for both targeted analytes, with enough evidence (p > 0.05) to prove the high specificity of the fabricated device versus a pool of possible interferent ions.
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Affiliation(s)
- Susana Díaz-Amaya
- Department of Materials Engineering, Purdue University. West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University. West Lafayette, Indiana 47907, United States
| | - Min Zhao
- School of Electrical and Computer Engineering, Purdue University. West Lafayette, Indiana 47907, United States
| | - Jan P Allebach
- School of Electrical and Computer Engineering, Purdue University. West Lafayette, Indiana 47907, United States
| | - George T-C Chiu
- School of Electrical and Computer Engineering, Purdue University. West Lafayette, Indiana 47907, United States
- School of Mechanical Engineering, Purdue University. West Lafayette, Indiana 47907, United States
| | - Lia A Stanciu
- Department of Materials Engineering, Purdue University. West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University. West Lafayette, Indiana 47907, United States
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22
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Tripathi P, Kumar A, Sachan M, Gupta S, Nara S. Aptamer-gold nanozyme based competitive lateral flow assay for rapid detection of CA125 in human serum. Biosens Bioelectron 2020; 165:112368. [PMID: 32729500 DOI: 10.1016/j.bios.2020.112368] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/27/2020] [Accepted: 06/05/2020] [Indexed: 02/07/2023]
Abstract
For several decades, point-of-care technology (POCT) has proven its potential regarding swift and cost-efficient detection of analytes. Lateral flow assay is a highly popular POC technology that needs improvisation to increase its sensitivity, cost effectiveness and quantification so that it becomes more user friendly and affordable technology. In this context, the present study has investigated the use of aptamers and nanozymes together for the first time in developing an Aptamer-nanozyme lateral flow assay (ALFA). The present study uses a specific aptamer for CA125 as capture reagent and peroxidase mimetic gold nanoparticles as label for detection of CA125 in human serum through developed competitive ALFA. The assay was specific and has a limit of detection of 3.71 U/mL. The ALFA test was in house validated for its precision, recovery and showed a significant correlation with established CA125 chemiluminiscent ELISA with P-value<0.0001. In summary, this assay quantitatively detects an analyte by using an aptamer and peroxidase mimetic gold nanoparticles that ensures circumventing the use of antibodies and incorporating enzyme mimetic activity in assay systems.
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Affiliation(s)
- Pranav Tripathi
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Teliyarganj, Prayagraj, Uttar Pradesh, India
| | - Anand Kumar
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Teliyarganj, Prayagraj, Uttar Pradesh, India
| | - Manisha Sachan
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Teliyarganj, Prayagraj, Uttar Pradesh, India
| | - Sameer Gupta
- Department of Surgical Oncology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Seema Nara
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Teliyarganj, Prayagraj, Uttar Pradesh, India.
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23
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Walter JG, Eilers A, Alwis LSM, Roth BW, Bremer K. SPR Biosensor Based on Polymer Multi-Mode Optical Waveguide and Nanoparticle Signal Enhancement. SENSORS (BASEL, SWITZERLAND) 2020; 20:E2889. [PMID: 32443702 PMCID: PMC7287642 DOI: 10.3390/s20102889] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/11/2020] [Accepted: 05/18/2020] [Indexed: 12/14/2022]
Abstract
We present a surface plasmon resonance (SPR) biosensor that is based on a planar-optical multi-mode (MM) polymer waveguide structure applied for the detection of biomolecules in the lower nano-molar (nM) range. The basic sensor shows a sensitivity of 608.6 nm/RIU when exposed to refractive index changes with a measurement resolution of 4.3 × 10-3 RIU. By combining the SPR sensor with an aptamer-functionalized, gold-nanoparticle (AuNP)-enhanced sandwich assay, the detection of C-reactive protein (CRP) in a buffer solution was achieved with a response of 0.118 nm/nM. Due to the multi-mode polymer waveguide structure and the simple concept, the reported biosensor is well suited for low-cost disposable lab-on-a-chip applications and can be used with rather simple and economic devices. In particular, the sensor offers the potential for fast and multiplexed detection of several biomarkers on a single integrated platform.
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Affiliation(s)
- Johanna-Gabriela Walter
- Institute of Technical Chemistry, Leibniz University of Hannover, 30167 Hannover, Germany; (J.-G.W.); (A.E.)
| | - Alina Eilers
- Institute of Technical Chemistry, Leibniz University of Hannover, 30167 Hannover, Germany; (J.-G.W.); (A.E.)
| | | | - Bernhard Wilhelm Roth
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering—Innovation Across Disciplines), 30167 Hannover, Germany;
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, 30167 Hannover, Germany
| | - Kort Bremer
- Hannover Centre for Optical Technologies, Leibniz University of Hannover, 30167 Hannover, Germany
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24
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Lin H, Fang F, Zang J, Su J, Tian Q, Kumar Kankala R, Lin X. A Fluorescent Sensor-Assisted Paper-Based Competitive Lateral Flow Immunoassay for the Rapid and Sensitive Detection of Ampicillin in Hospital Wastewater. MICROMACHINES 2020; 11:mi11040431. [PMID: 32326021 PMCID: PMC7231327 DOI: 10.3390/mi11040431] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/29/2020] [Accepted: 04/14/2020] [Indexed: 01/10/2023]
Abstract
In this study, a convenient assay method has been developed based on labeled functional nucleic acids (H-DNA) and a competitive fluorescent lateral flow immunoassay (CF-LFI) for ampicillin (AMP) detection. Herein, we designed the tunable AMP probes for AMP detection based on the AMP aptamer, and the secondary DNA fragment. The probes can generate tunable signals on the test line (T line) and control line (C line) according to the concentration of AMP. The accuracy of detection was improved by optimizing the tunable AMP probes. Under the optimal conditions, the linear concentration of AMP detection is ranged from 10 to 200 ng/L with a limit of quantitation (LOQ) value of 2.71 ng/L, and the recovery is higher than 80.5 %. Moreover, the developed method shows the potential application for AMP detection in the hospital wastewater.
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Affiliation(s)
- Honggui Lin
- Fujian Province Key Laboratory of Ship and Ocean Engineering, Marine Engineering College, Jimei University, Xiamen 361021, China; (H.L.); (Q.T.)
| | - Feixiang Fang
- Department of Chemical Engineering& Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China; (F.F.); (J.Z.); (J.S.); (R.K.K.)
| | - Jiahui Zang
- Department of Chemical Engineering& Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China; (F.F.); (J.Z.); (J.S.); (R.K.K.)
| | - Jianlong Su
- Department of Chemical Engineering& Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China; (F.F.); (J.Z.); (J.S.); (R.K.K.)
| | - Qingyuan Tian
- Fujian Province Key Laboratory of Ship and Ocean Engineering, Marine Engineering College, Jimei University, Xiamen 361021, China; (H.L.); (Q.T.)
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China
| | - Ranjith Kumar Kankala
- Department of Chemical Engineering& Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China; (F.F.); (J.Z.); (J.S.); (R.K.K.)
| | - Xuexia Lin
- Department of Chemical Engineering& Pharmaceutical Engineering, College of Chemical Engineering, Huaqiao University, Xiamen 361021, China; (F.F.); (J.Z.); (J.S.); (R.K.K.)
- Correspondence:
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25
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Reid R, Chatterjee B, Das SJ, Ghosh S, Sharma TK. Application of aptamers as molecular recognition elements in lateral flow assays. Anal Biochem 2020; 593:113574. [PMID: 31911046 DOI: 10.1016/j.ab.2020.113574] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/02/2020] [Accepted: 01/02/2020] [Indexed: 02/07/2023]
Abstract
Owing to their ease in operation and fast turnaround time, lateral flow assays (LFAs) are increasingly being used as point-of-care diagnostic tests for variety of analytes. In a majority of these LFAs, antibodies are used as a molecular recognition element. Antibodies have a number of limitations such as high batch-to-batch variation, poor stability, long development time, difficulty in functionalization and need for ethical approval and cold chain. All these factors pose a great challenge to scale up the antibody-based tests. In recent years, the advent of aptamer technology has made a paradigm shift in the point-of-care diagnostics owing to the various advantages of aptamers over antibodies that favour their adaptability on a variety of sensing platforms including the lateral flow. In this review, we have highlighted the advantages of aptamers over antibodies, suitability of aptamers for lateral flow platforms, different types of aptamer-based LFAs and various labels for aptamer-based LFAs. We have also provided a summary of the applications of aptamer technology in LFAs for analytical applications.
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Affiliation(s)
- Ruth Reid
- Centre for Biological Engineering, Loughborough University, UK
| | - Bandhan Chatterjee
- Multidisciplinary Clinical and Translational Research Group, Translational Health Science and Technology Institute (THSTI), Faridabad, Haryana, India
| | - Soon Jyoti Das
- Multidisciplinary Clinical and Translational Research Group, Translational Health Science and Technology Institute (THSTI), Faridabad, Haryana, India
| | - Sourav Ghosh
- Centre for Biological Engineering, Loughborough University, UK.
| | - Tarun Kumar Sharma
- Multidisciplinary Clinical and Translational Research Group, Translational Health Science and Technology Institute (THSTI), Faridabad, Haryana, India.
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26
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Yeom G, Kang J, Jang H, Nam HY, Kim MG, Park CJ. Development of DNA Aptamers against the Nucleocapsid Protein of Severe Fever with Thrombocytopenia Syndrome Virus for Diagnostic Application: Catalytic Signal Amplification using Replication Protein A-Conjugated Liposomes. Anal Chem 2019; 91:13772-13779. [PMID: 31602980 DOI: 10.1021/acs.analchem.9b03210] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Most prevalent infectious diseases worldwide are caused by mediators such as insects and characterized by high mortality and morbidity, thereby creating a global public health concern. Therefore, a sensitive, selective detection platform for diagnosing diseases in the early stages of infection is needed to prevent disease spread and to protect public health. Here, we developed novel DNA aptamers specific to the nucleocapsid protein (NP) of the severe fever with thrombocytopenia syndrome (SFTS) virus and synthesized ssDNA-binding protein-conjugated liposomes encapsulated with horseradish peroxidase (HRP) for application in a simple and universal platform. This platform achieved highly sensitive detection of the NP by measuring the colorimetric signal following lysis of the HRP encapsulated liposomes, mediated by a mixture of 3,3',5,5'-tetramethylbenzidine and H2O2 solution. The limit of detection was 0.009 ng·mL-1, and NP was successfully detected in diluted human serum with a high recovery rate. Moreover, this method was specific and did not exhibit cross-reactivity among NPs of other virus types. These results demonstrated the efficacy of the proposed method as a highly sensitive, specific, and universal diagnostic tool for potential application in monitoring of the early stages of infectious diseases.
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Affiliation(s)
- Gyuho Yeom
- Department of Chemistry, School of Physics and Chemistry , Gwangju Institute of Science and Technology (GIST) , 123 Cheomdangwagi-ro , Buk-gu, Gwangju , 61005 , Republic of Korea
| | - Juyoung Kang
- Department of Chemistry, School of Physics and Chemistry , Gwangju Institute of Science and Technology (GIST) , 123 Cheomdangwagi-ro , Buk-gu, Gwangju , 61005 , Republic of Korea
| | - Hyungjun Jang
- Department of Chemistry, School of Physics and Chemistry , Gwangju Institute of Science and Technology (GIST) , 123 Cheomdangwagi-ro , Buk-gu, Gwangju , 61005 , Republic of Korea
| | - Ho Yeon Nam
- Department of Chemistry, School of Physics and Chemistry , Gwangju Institute of Science and Technology (GIST) , 123 Cheomdangwagi-ro , Buk-gu, Gwangju , 61005 , Republic of Korea
| | - Min-Gon Kim
- Department of Chemistry, School of Physics and Chemistry , Gwangju Institute of Science and Technology (GIST) , 123 Cheomdangwagi-ro , Buk-gu, Gwangju , 61005 , Republic of Korea
| | - Chin-Ju Park
- Department of Chemistry, School of Physics and Chemistry , Gwangju Institute of Science and Technology (GIST) , 123 Cheomdangwagi-ro , Buk-gu, Gwangju , 61005 , Republic of Korea
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Jiang N, Ahmed R, Damayantharan M, Ünal B, Butt H, Yetisen AK. Lateral and Vertical Flow Assays for Point-of-Care Diagnostics. Adv Healthc Mater 2019; 8:e1900244. [PMID: 31081270 DOI: 10.1002/adhm.201900244] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 04/08/2019] [Indexed: 02/03/2023]
Abstract
Lateral flow assays (LFAs) have been the pillar of rapid point-of-care (POC) diagnostics due to their simplicity, rapid process, and low cost. Recent advances in sensitivity, selectivity, and chemical stability enhancement have ensured the foothold of LFAs in commercial POC diagnostics. This paper reviews recent developments in labeling strategies and detection methods of LFAs. Moreover, vertical flow assays (VFAs) have emerged as an alternate paper-based assay due to faster detection time and unique multiplexing capabilities. Smartphones as LFA readers have been transformed into a universal integrated platform for imaging, data processing, and storage, providing quantitative results in low-resource settings. Commercial LFAs and VFAs products are evaluated with regards to their performance, market trends, and regulatory issues. The future outlook of the flow-based assays for POC diagnostics is also discussed.
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Affiliation(s)
- Nan Jiang
- School of Engineering and Applied SciencesHarvard University Cambridge MA 02138 USA
| | - Rajib Ahmed
- School of MedicineStanford University Palo Alto CA 94304 USA
| | - Mylon Damayantharan
- School of EngineeringUniversity of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Barış Ünal
- Triton Systems Inc. 200 Turnpike Rd. Chelmsford MA 01824 USA
| | - Haider Butt
- School of EngineeringUniversity of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Ali K. Yetisen
- Department of Chemical EngineeringImperial College London London SW7 2AZ UK
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Taghdisi SM, Danesh NM, Nameghi MA, Ramezani M, Alibolandi M, Abnous K. An electrochemical sensing platform based on ladder-shaped DNA structure and label-free aptamer for ultrasensitive detection of ampicillin. Biosens Bioelectron 2019; 133:230-235. [PMID: 30951983 DOI: 10.1016/j.bios.2019.03.044] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/20/2019] [Accepted: 03/21/2019] [Indexed: 12/27/2022]
Abstract
Herein, an electrochemical aptasensor is described for detection of ampicillin (Ampi). The sensing strategy is based on the application of a ladder-shaped DNA structure as a multi-layer physical block on the surface of gold electrode. Attributing to the electrostatic repulsion and physical prevention of the ladder-shaped DNA structure, ultrasensitive detection of Ampi was achieved with a detection limit as low as 1 pM. In the presence of Ampi, the ladder-shaped DNA structure is disassembled and detached from the electrode surface. This leads to the high access of [Fe(CN)6]3-/4- as a redox indicator to the electrode surface and a strong redox peak. The aptasensor response for Ampi detection was in the linear range from 7 pM to 100 nM with the detection limit of 1 pM. The presented analytical strategy showed its application in detecting Ampi in the spiked milk samples with satisfactory performance. This work can be easily expanded for different targets by alternating the corresponding aptamers.
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Affiliation(s)
- Seyed Mohammad Taghdisi
- Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Morteza Alinezhad Nameghi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Ramezani
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mona Alibolandi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Khalil Abnous
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
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29
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Mansouri A, Abnous K, Alibolandi M, Taghdisi SM, Ramezani M. Targeted delivery of tacrolimus to T cells by pH-responsive aptamer-chitosan- poly(lactic-co-glycolic acid) nanocomplex. J Cell Physiol 2019; 234:18262-18271. [PMID: 30883749 DOI: 10.1002/jcp.28458] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/03/2019] [Accepted: 02/14/2019] [Indexed: 01/18/2023]
Abstract
Tacrolimus (TAC) acts as an inhibitor of calcineurin, which inhibits the production of interleukin-2. In this study, we aimed to design a targeted delivery platform with poly (lactide-co-glycolide; PLGA) nanoparticles modified with chitosan (CS) and CD8AP17s aptamer (Apt). MOLT-4 cells as CD8 positive and JURKAT cells as CD negative were adopted to investigate the efficacy of the proposed delivery system in vitro. The particle size and Ζ potential of the TAC-PLGA-CS-Apt nanocomplex were 345 nm and 13.7 mV, respectively. Release study showed an efficient TAC release from complex in citrate buffer (pH 5.5). The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay showed that TAC-PLGA-CS-Apt nanocomplex was highly selective toward MOLT-4 cells. Complex increased the cellular uptake of TAC in MOLT-4 cells (target) while reducing its cytotoxicity in JURKAT cells (nontarget). Our study showed that complex nanoconjugate could efficiently deliver TAC into MOLT-4 cells as a model of cytotoxic T cell and it could be considered as a potential candidate for TAC delivery.
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Affiliation(s)
- Atena Mansouri
- Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Students Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Khalil Abnous
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mona Alibolandi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Mohammad Taghdisi
- Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Ramezani
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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30
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Tavakkoli N, Soltani N, Mohammadi F. A nanoporous gold-based electrochemical aptasensor for sensitive detection of cocaine. RSC Adv 2019; 9:14296-14301. [PMID: 35519350 PMCID: PMC9066177 DOI: 10.1039/c9ra01292c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 04/29/2019] [Indexed: 12/11/2022] Open
Abstract
The increasing application of aptamers in bioassays has triggered a lot of research interest for development of highly sensitive and selective sensing platforms. Herein, we report on the design of a sensitive cocaine biosensor by immobilizing the 5′-disulfide-functionalized end of an aptamer sequence on a nanoporous gold (NPG) electrode followed by the conjugation of its 3′-amino-functionalized end to 2,5-dihydroxybenzoic acid (DHBA) as the redox probe. In the presence of cocaine, the aptamer undergoes a conformational change from an open unfolded state to a closed conformation, which reduces the distance between DHBA and the electrode surface, resulting in the enhanced electron-transfer efficiency. Using square wave voltammetric method and under the optimal conditions, the cocaine aptasensor presented two linear responses in the concentration ranges between 0.05–1 and 1–35 μM, with an excellent detection limit of 21 nM. The proposed aptasensor provides a simple and low-cost method for cocaine detection with good reproducibility and accuracy. Furthermore, it could be regarded as a general model to investigate the unique function of aptamer-functionalized nanostructured electrodes to stablish highly advanced electrochemical biosensors for various target analytes of diagnostic importance. The increasing application of aptamers in bioassays has triggered a lot of research interest for development of highly sensitive and selective sensing platforms.![]()
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Anfossi L, Di Nardo F, Cavalera S, Giovannoli C, Baggiani C. Multiplex Lateral Flow Immunoassay: An Overview of Strategies towards High-throughput Point-of-Need Testing. BIOSENSORS 2018; 9:E2. [PMID: 30587769 PMCID: PMC6468474 DOI: 10.3390/bios9010002] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/19/2018] [Accepted: 12/23/2018] [Indexed: 12/31/2022]
Abstract
Simultaneous measurement of different substances from a single sample is an emerging issue for achieving efficient and high-throughput detection in several fields of application. Although immunoanalytical techniques have well-established and prevailing advantages over alternative screening analytical platforms, one of the incoming challenges for immunoassay is exact multiplexing. Lateral flow immunoassay (LFIA) is a leading immunoanalytical technique for onsite analysis, thanks to its simplicity, rapidity, and cost-effectiveness. Moreover, LFIA architecture is adaptable to multiplexing, and is therefore a possible answer to the pressing demand of multiplexing point-of-need analysis. This review presents an overview of diverse approaches for multiplex LFIA, with a special focus on strategies based on new types of magnetic, fluorescent, and colored labels.
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Affiliation(s)
- Laura Anfossi
- Department of Chemistry, University of Turin, Via Giuria, 5, I-10125 Turin, Italy.
| | - Fabio Di Nardo
- Department of Chemistry, University of Turin, Via Giuria, 5, I-10125 Turin, Italy.
| | - Simone Cavalera
- Department of Chemistry, University of Turin, Via Giuria, 5, I-10125 Turin, Italy.
| | - Cristina Giovannoli
- Department of Chemistry, University of Turin, Via Giuria, 5, I-10125 Turin, Italy.
| | - Claudio Baggiani
- Department of Chemistry, University of Turin, Via Giuria, 5, I-10125 Turin, Italy.
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Wang X, Cohen L, Wang J, Walt DR. Competitive Immunoassays for the Detection of Small Molecules Using Single Molecule Arrays. J Am Chem Soc 2018; 140:18132-18139. [PMID: 30495929 DOI: 10.1021/jacs.8b11185] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Small-molecule detection is important for many applications including clinical diagnostics, drug discovery, and measurements of environmental samples and agricultural products. Current techniques for small-molecule detection suffer from various limitations including low analytical sensitivity and complex sample processing. Furthermore, as a result of their small size, small molecules are difficult to detect using an antibody pair in a traditional sandwich assay format. To overcome these limitations, we developed an ultrasensitive competitive immunoassay for small-molecule detection using Single Molecule Arrays (Simoa). We show that the competitive Simoa assay is approximately 50-fold more sensitive than the conventional ELISA. We performed theoretical calculations to determine the factors that influence the sensitivity of competitive Simoa assays and used them to achieve maximal sensitivity. We also demonstrate detection of small molecules in complex biological samples. We show that the competitive Simoa assay is a simple, fast, and highly sensitive approach for ultrasensitive detection of small molecules.
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Affiliation(s)
- Xu Wang
- Department of Pathology, Brigham and Women's Hospital , Harvard Medical School , Boston , Massachusetts 02115 , United States
| | - Limor Cohen
- Department of Pathology, Brigham and Women's Hospital , Harvard Medical School , Boston , Massachusetts 02115 , United States
| | - Jun Wang
- School of Physical and Mathematical Sciences , Nanjing Tech University , Nanjing , Jiangsu 211816 , China
| | - David R Walt
- Department of Pathology, Brigham and Women's Hospital , Harvard Medical School , Boston , Massachusetts 02115 , United States
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Khoshbin Z, Housaindokht MR, Verdian A, Bozorgmehr MR. Simultaneous detection and determination of mercury (II) and lead (II) ions through the achievement of novel functional nucleic acid-based biosensors. Biosens Bioelectron 2018; 116:130-147. [PMID: 29879539 DOI: 10.1016/j.bios.2018.05.051] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 05/26/2018] [Accepted: 05/28/2018] [Indexed: 02/07/2023]
Abstract
The serious threats of mercury (Hg2+) and lead (Pb2+) ions for the public health makes it important to achieve the detection methods of the ions with high affinity and specificity. Metal ions usually coexist in some environment and foodstuff or clinical samples. Therefore, it is very necessary to develop a fast and simple method for simultaneous monitoring the amount of metal ions, especially when Hg2+ and Pb2+ coexist. DNAzyme-based biosensors and aptasensors have been highly regarded for this purpose as two main groups of the functional nucleic acid (FNA)-based biosensors. In this review, we summarize the recent achievements of functional nucleic acid-based biosensors for the simultaneous detection of Hg2+ and Pb2+ ions in two main optical and electrochemical groups. The tremendous interest in utilizing the various nanomaterials is also highlighted in the fabrication of the FNA-based biosensors. Finally, some results are presented based on the advantages and disadvantages of the studied FNA-based biosensors to compare their validation.
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Affiliation(s)
- Zahra Khoshbin
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | | | - Asma Verdian
- Department of Food Safety and Quality Control, Research Institute of Food Science and Technology (RIFST), Mashhad, Iran
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