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Chen H, Zheng S, Zhang Y, Tang Q, Zhang R, Chen Y, Wu M, Liu L. Visual Detection of LPS at the Femtomolar Level Based on Click Chemistry-Induced Gold Nanoparticles Electrokinetic Accumulation. Anal Chem 2024; 96:6995-7004. [PMID: 38666367 DOI: 10.1021/acs.analchem.4c00069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Lipopolysaccharide (LPS) presents a significant threat to human health. Herein, a novel method for detecting LPS was developed by coupling hybridization chain reaction (HCR), gold nanoparticles (AuNPs) agglutination (AA) triggered by a Cu(I)-catalyzed azide-alkyne cycloaddition click chemistry (CuAAC), and electrokinetic accumulation (EA) in a microfluidic chip, termed the HCR-AA-EA method. Thereinto, the LPS-binding aptamer (LBA) was coupled with the AuNP-coated Fe3O4 nanoparticle, which was connected with the polymer of H1 capped on CuO (H1-CuO) and H2-CuO. Upon LPS recognition by LBA, the polymers of H1- and H2-CuO were released into the solution, creating a "one LPS-multiple CuO" effect. Under ascorbic acid reduction, CuAAC was initiated between the alkyne and azide groups on the AuNPs' surface; then, the product was observed visually in the microchannel by EA. Finally, LPS was quantified by the integrated density of AuNP aggregates. The limit of detections were 29.9 and 127.2 fM for water samples and serum samples, respectively. The levels of LPS in the injections and serum samples by our method had a good correlation with those from the limulus amebocyte lysate test (r = 0.99), indicating high accuracy. Remarkably, to popularize our method, a low-cost, wall-power-free portable device was developed, enabling point-of-care testing.
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Affiliation(s)
- Hanren Chen
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Shiquan Zheng
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Yitong Zhang
- School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China
| | - Qing Tang
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Runhui Zhang
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Yue Chen
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, School of Pharmaceutical Sciences, Hubei University of Medicine, Shiyan 442000, China
| | - Meiming Wu
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Lihong Liu
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
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Xie S, Liang S, Tian L, Ding G, He M, Li H, Yang H. Electrochemical aptasensor based on DNA-templated copper nanoparticles and RecJf exonuclease-assisted target recycling for lipopolysaccharide detection. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:396-402. [PMID: 38131415 DOI: 10.1039/d3ay01638b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
An electrochemical aptasensor for detecting lipopolysaccharides (LPS) was fabricated based on DNA-templated copper nanoparticles (DNA-CuNPs) and RecJf exonuclease-assisted target recycling. The DNA-CuNPs were synthesized on a double-stranded DNA template generated through the hybridization of the LPS aptamer and its complementary chain (cDNA). In the absence of LPS, the CuNPs were synthesized on DNA double-strands, and a strong readout corresponding to the CuNPs was achieved at 0.10 V (vs. SCE). In the presence of LPS, the fabricated aptamer could detach from the DNA double-strand to form a complex with LPS, disrupting the template for the synthesis of CuNPs on the electrode. Meanwhile, RecJf exonuclease could hydrolyze the cDNA together with this single-stranded aptamer, releasing the LPS for the next round of aptamer binding, thereby enabling target recycling amplification. As a result, the electrochemical signal decreased and could be used to indicate the LPS content. The fabricated electrochemical aptasensor exhibited an extensive dynamic working range of 0.01 pg mL-1 to 100 ng mL-1, and its detection limit was 6.8 fg mL-1. The aptasensor also exhibited high selectivity and excellent reproducibility. Moreover, the proposed aptasensor could be used in practical applications for the detection of LPS in human serum samples.
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Affiliation(s)
- Shunbi Xie
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, College of Chemistry & Environmental Engineering (Chongqing University of Arts and Sciences), Chongqing 402160, P. R. China.
| | - Shuting Liang
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, College of Chemistry & Environmental Engineering (Chongqing University of Arts and Sciences), Chongqing 402160, P. R. China.
| | - Liangliang Tian
- School of Electronic Information and Electrical Engineering (Chongqing University of Arts and Sciences), Chongqing 402160, P. R. China
| | - Ge Ding
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, College of Chemistry & Environmental Engineering (Chongqing University of Arts and Sciences), Chongqing 402160, P. R. China.
| | - Meiting He
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, College of Chemistry & Environmental Engineering (Chongqing University of Arts and Sciences), Chongqing 402160, P. R. China.
| | - Haojie Li
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, College of Chemistry & Environmental Engineering (Chongqing University of Arts and Sciences), Chongqing 402160, P. R. China.
| | - Heshan Yang
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, College of Chemistry & Environmental Engineering (Chongqing University of Arts and Sciences), Chongqing 402160, P. R. China.
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Sondhi P, Adeniji T, Lingden D, Stine KJ. Advances in endotoxin analysis. Adv Clin Chem 2024; 118:1-34. [PMID: 38280803 DOI: 10.1016/bs.acc.2023.11.001] [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] [Indexed: 01/29/2024]
Abstract
The outer membrane of gram-negative bacteria is primarily composed of lipopolysaccharide (LPS). In addition to protection, LPS defines the distinct serogroups used to identify bacteria specifically. Furthermore, LPS also act as highly potent stimulators of innate immune cells, a phenomenon essential to understanding pathogen invasion in the body. The complex multi-step process of LPS binding to cells involves several binding partners, including LPS binding protein (LBP), CD14 in both membrane-bound and soluble forms, membrane protein MD-2, and toll-like receptor 4 (TLR4). Once these pathways are activated, pro-inflammatory cytokines are eventually expressed. These binding events are also affected by the presence of monomeric or aggregated LPS. Traditional techniques to detect LPS include the rabbit pyrogen test, the monocyte activation test and Limulus-based tests. Modern approaches are based on protein, antibodies or aptamer binding. Recently, novel techniques including electrochemical methods, HPLC, quartz crystal microbalance (QCM), and molecular imprinting have been developed. These approaches often use nanomaterials such as gold nanoparticles, quantum dots, nanotubes, and magnetic nanoparticles. This chapter reviews current developments in endotoxin detection with a focus on modern novel techniques that use various sensing components, ranging from natural biomolecules to synthetic materials. Highly integrated and miniaturized commercial endotoxin detection devices offer a variety of options as the scientific and technologic revolution proceeds.
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Affiliation(s)
- Palak Sondhi
- Department of Chemistry and Biochemistry, University of Missouri-Saint Louis, Saint Louis, MO, United States
| | - Taiwo Adeniji
- Department of Chemistry and Biochemistry, University of Missouri-Saint Louis, Saint Louis, MO, United States
| | - Dhanbir Lingden
- Department of Chemistry and Biochemistry, University of Missouri-Saint Louis, Saint Louis, MO, United States
| | - Keith J Stine
- Department of Chemistry and Biochemistry, University of Missouri-Saint Louis, Saint Louis, MO, United States.
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Jiang J, Huang B, Li N, An C, Sun C, Shen Y, Gooneratne R, Cui H, Zhan S, Wang Y. Simple and fast colorimetric detection of lipopolysaccharide based on aptamer and SYBR Green I mediated aggregation of gold nanoparticles. Int J Biol Macromol 2022; 223:231-239. [PMID: 36347371 DOI: 10.1016/j.ijbiomac.2022.10.276] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 10/26/2022] [Accepted: 10/31/2022] [Indexed: 11/08/2022]
Abstract
Lipopolysaccharide (LPS) poses a considerable threat to food safety and human health. A colorimetric assay for LPS detection based on LPS binding aptamer (LBA) and SYBR Green I (SG) mediated aggregation of gold nanoparticles (AuNPs) was established. In the absence of LPS, the LBA was absorbed onto the AuNPs surface which prevented SG-induced aggregation of AuNPs, and the sensing system exhibited red color. When LPS was added, it interacted with the LBA, forming a complex. At higher LPS concentration, many LBAs were exhausted resulting in SG-induced aggregation of AuNPs, and color change from red to blue. The range of colorimetric detection of LPS was linear in 0-12 EU/mL, with a limit of detection of 0.1698 EU/mL. Spiked LPS in real samples and interfering substances were also identified. This assay ingeniously using the fluorescent dye SG as an effective trigger of AuNPs aggregation, is rapid and facile than most of those earlier reported LBA-based LPS assays, and there is potential to be modified to construct assays for other targets.
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Affiliation(s)
- Jiajun Jiang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Bingna Huang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Ningjun Li
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Changcheng An
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Changjiao Sun
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yue Shen
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Ravi Gooneratne
- Department of Wine, Food and Molecular Biosciences, Faculty of Agriculture and Life Sciences, Lincoln University, Lincoln 7647, New Zealand
| | - Haixin Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Shenshan Zhan
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Yan Wang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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Label-free detection of endotoxin and gram-negative bacteria from water using copper (I) oxide anchored reduced graphene oxide. Anal Chim Acta 2022; 1237:340597. [DOI: 10.1016/j.aca.2022.340597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 10/15/2022] [Accepted: 11/05/2022] [Indexed: 11/09/2022]
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Nair RV, Thomas T, Kuttoth H, Karthikeyan A, Nair BG, Sandhyarani N. Cu 2+-Mediated Aggregation of Gold Nanoparticles as an Optical Probe for the Detection of Endotoxin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10826-10835. [PMID: 35994084 DOI: 10.1021/acs.langmuir.2c01436] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Endotoxins or lipopolysaccharides (LPS) present in the outer layer of Gram-negative bacteria (GNB) are responsible for bacterial toxicity. It is an environmental hazard that everyone is exposed to daily to various extents. Due to its potent toxicity, quantitative detection with very high sensitivity is essential in the food, medical, and pharmaceutical industries. Herein, we report an optical nanosensor for the rapid and sensitive detection of LPS and GNB based on the Cu2+-mediated aggregation of gold nanoparticles (Cu@AuNPs). The sensor detects LPS within a linear range of 20 ag/mL to 20 ng/mL with a lower detection limit of 0.2 ag/mL. The sensor could successfully recover spiked endotoxin in grape juice with a percentage error of ±0.2, confirming its application in the food industry. The sensor could also distinguish Gram-negative bacteria from Gram-positive bacteria, and the selectivity of the Cu@AuNP sensor toward GNB is utilized to detect Escherichia coli in wastewater. The rapid detection of E. coli without any pretreatment is a promising strategy in water analysis.
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Affiliation(s)
- Resmi V Nair
- Nanoscience Research Laboratory, School of Materials Science and Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India
| | - Teena Thomas
- Nanoscience Research Laboratory, School of Materials Science and Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India
| | - Haritha Kuttoth
- Nanoscience Research Laboratory, School of Materials Science and Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India
| | - Akash Karthikeyan
- Bionano Engineering Laboratory, School of Biotechnology, National Institute of Technology, Calicut, Calicut 673601, Kerala, India
| | - Baiju G Nair
- Bionano Engineering Laboratory, School of Biotechnology, National Institute of Technology, Calicut, Calicut 673601, Kerala, India
| | - N Sandhyarani
- Nanoscience Research Laboratory, School of Materials Science and Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India
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Spongy Co/Ni-Bio-MOF-based electrochemical aptasensor for detection of kanamycin based on coral-like ZrO2@Au as an amplification platform. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Sheng A, Yang J, Cheng L, Zhang J. Boronic Ester-Mediated Dual Recognition Coupled with a CRISPR/Cas12a System for Lipopolysaccharide Analysis. Anal Chem 2022; 94:12523-12530. [PMID: 36040369 DOI: 10.1021/acs.analchem.2c02776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, boronic ester-mediated dual recognition has been coupled with a CRISPR/Cas12a system; thus, a new method for highly specific and sensitive detection of lipopolysaccharide (LPS) is proposed via the simultaneous recognition of boronic acid and an LPS aptamer (LPSA) as well as signal amplification by CRISPR/Cas12a. Specifically, boronic acid-modified magnetic beads (MB@APBA) and aptamers are employed for the simultaneous dual recognition of LPS, while polymerase isotherm amplification is further utilized to induce LPS cycling and form a double strand, which can activate the CRISPR/Cas12a system so as to amplify the signal. Consequently, a linear detection range can be obtained from 0.05 to 5000 ng/mL, with the lowest detection limit of 44.86 pg/mL. The capturing of MB@APBA on 1, 2- and 1, 3-cis dihydroxyl-containing substances can not only eliminate the interference of other molecules but also enhance the highly specific recognition of LPSA on LPS. Moreover, MB@APBA can be reused by adjusting the pH value of the reaction system. The method can be developed as a universal platform for the analytical detection of other carbohydrates.
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Affiliation(s)
- Anzhi Sheng
- Department of Central Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, P. R. China.,Research Center of Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Jingyi Yang
- Research Center of Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Liangfen Cheng
- Research Center of Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Juan Zhang
- Research Center of Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai 200444, P. R. China
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Bu L, Chen X, Song Q, Jiang D, Shan X, Wang W, Chen Z. Supersensitive detection of chloramphenicol with an EIS method based on molecularly imprinted polypyrrole at UiO-66 and CDs modified electrode. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107459] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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10
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Wang X, Lu D, Liu Y, Wang W, Ren R, Li M, Liu D, Liu Y, Liu Y, Pang G. Electrochemical Signal Amplification Strategies and Their Use in Olfactory and Taste Evaluation. BIOSENSORS 2022; 12:bios12080566. [PMID: 35892464 PMCID: PMC9394270 DOI: 10.3390/bios12080566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 07/20/2022] [Accepted: 07/24/2022] [Indexed: 05/07/2023]
Abstract
Biosensors are powerful analytical tools used to identify and detect target molecules. Electrochemical biosensors, which combine biosensing with electrochemical analysis techniques, are efficient analytical instruments that translate concentration signals into electrical signals, enabling the quantitative and qualitative analysis of target molecules. Electrochemical biosensors have been widely used in various fields of detection and analysis due to their high sensitivity, superior selectivity, quick reaction time, and inexpensive cost. However, the signal changes caused by interactions between a biological probe and a target molecule are very weak and difficult to capture directly by using detection instruments. Therefore, various signal amplification strategies have been proposed and developed to increase the accuracy and sensitivity of detection systems. This review serves as a reference for biosensor and detector research, as it introduces the research progress of electrochemical signal amplification strategies in olfactory and taste evaluation. It also discusses the latest signal amplification strategies currently being employed in electrochemical biosensors for nanomaterial development, enzyme labeling, and nucleic acid amplification techniques, and highlights the most recent work in using cell tissues as biosensitive elements.
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Affiliation(s)
- Xinqian Wang
- Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.W.); (M.L.); (D.L.); (Y.L.); (Y.L.)
| | - Dingqiang Lu
- Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.W.); (M.L.); (D.L.); (Y.L.); (Y.L.)
- Correspondence: (D.L.); (G.P.)
| | - Yuan Liu
- Department of Food Science & Technology, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (Y.L.); (W.W.)
| | - Wenli Wang
- Department of Food Science & Technology, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (Y.L.); (W.W.)
| | - Ruijuan Ren
- Tianjin Institute for Food Safety Inspection Technology, Tianjin 300308, China;
| | - Ming Li
- Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.W.); (M.L.); (D.L.); (Y.L.); (Y.L.)
| | - Danyang Liu
- Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.W.); (M.L.); (D.L.); (Y.L.); (Y.L.)
| | - Yujiao Liu
- Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.W.); (M.L.); (D.L.); (Y.L.); (Y.L.)
| | - Yixuan Liu
- Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.W.); (M.L.); (D.L.); (Y.L.); (Y.L.)
| | - Guangchang Pang
- Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology & Food Science, Tianjin University of Commerce, Tianjin 300134, China; (X.W.); (M.L.); (D.L.); (Y.L.); (Y.L.)
- Correspondence: (D.L.); (G.P.)
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Liu R, Zhang F, Sang Y, Katouzian I, Jafari SM, Wang X, Li W, Wang J, Mohammadi Z. Screening, identification, and application of nucleic acid aptamers applied in food safety biosensing. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.03.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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12
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Bothammal P, Michelraj S, Venkatachalam G, Verma A, Natarajaseenivasan K. Electrochemical biosensor for serogroup specific diagnosis of leptospirosis. Bioelectrochemistry 2022; 144:108005. [PMID: 34864273 DOI: 10.1016/j.bioelechem.2021.108005] [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: 04/05/2021] [Revised: 11/18/2021] [Accepted: 11/21/2021] [Indexed: 11/02/2022]
Abstract
A problem with the current leptospirosis diagnostic methods is the low sensitivity and specificity during the acute phase of illness. Rapid point-of-care (POC) assays with minimal sample utilization and low cost are desired in clinical practice. Here, we report for the first time lipopolysaccharide (LPS) based electrochemical biosensor that offers a rapid, highly sensitive, serogroup specific diagnosis of leptospirosis during the acute stage of infection and also to distinguish from other flu like infections. The proposed sensor is fabricated by the immobilization of LPS onto dodecanethiol (DT) modified gold electrode. Monolayer of DT is attached through covalent bond (Au-S) interaction onto the gold electrode. Thus, leptospiral antibodies from the human serum samples bind to the LPS present on self-assembled monolayer (SAM) of DT and showed a higher RCT value compared to SAM. The detection limit of the developed LPS sensor is estimated to be 100 nM. This biosensor is the first electrochemical sensing platform used for detection of LPS from Leptospira spp. This method is completely a solution-based diagnostic method and therefore it is rapid, simple, and sensitive; thus establishing a key technology towards a useful POC diagnostic strategy in serogroup level and hence an alternative to MAT.
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Affiliation(s)
- Palanisamy Bothammal
- Medical Microbiology Laboratory, Department of Microbiology, Center for Excellence in Life Sciences, Bharathidasan University, Tiruchirappalli - 620 024, Tamil Nadu, India
| | - Singarayan Michelraj
- Electrodics and Electrocatalysis (EEC) Division, CSIR - Central Electrochemical Research Institute (CSIR - CECRI), Karaikudi - 630003, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ganesh Venkatachalam
- Electrodics and Electrocatalysis (EEC) Division, CSIR - Central Electrochemical Research Institute (CSIR - CECRI), Karaikudi - 630003, Tamil Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Ashutosh Verma
- Lincoln Memorial University, College of Veterinary Medicine, Harrogate, TN 37752, USA.
| | - Kalimuthusamy Natarajaseenivasan
- Medical Microbiology Laboratory, Department of Microbiology, Center for Excellence in Life Sciences, Bharathidasan University, Tiruchirappalli - 620 024, Tamil Nadu, India; Department of Neural Sciences, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA.
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A novel labeled and label-free dual electrochemical detection of endotoxin based on aptamer-conjugated magnetic reduced graphene oxide-gold nanocomposite. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116116] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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14
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Aptamer-binding zirconium-based metal-organic framework composites prepared by two conjunction approaches with enhanced bio-sensing for detecting isocarbophos. Talanta 2022; 236:122822. [PMID: 34635212 DOI: 10.1016/j.talanta.2021.122822] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/20/2021] [Accepted: 08/22/2021] [Indexed: 11/22/2022]
Abstract
A novel label-free and enzyme-free detection strategy has been developed for the electrochemical biosensor detection of isocarbophos (ICP) using UiO-66-NH2 and aptamer as the signal transducers. In this work, the ICP aptamers were attached to UiO-66-NH2 through physical mixing and chemical combination methods. In the presence of ICP, the aptamers could undergo conformational change and bind to them, which prevent the electron transfer to the surface of electrode. By comparing the two conjunction approaches of aptasensors, these proposed strategies could selectively and sensitively detect ICP with a detection limit of 6 ng mL-1 (20.74 nM) and 0.9 ng mL-1 (3.11 nM). Furthermore, we have also demonstrated the capability of this strategy in the detection of ICP in real samples from vegetable and fruit extract, indicating the potential application of this strategy in food safety issues.
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15
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Mobed A, Hasanzadeh M. Environmental protection based on the nanobiosensing of bacterial lipopolysaccharides (LPSs): material and method overview. RSC Adv 2022; 12:9704-9724. [PMID: 35424904 PMCID: PMC8959448 DOI: 10.1039/d1ra09393b] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 03/08/2022] [Indexed: 12/13/2022] Open
Abstract
Lipopolysaccharide (LPS) or endotoxin control is critical for environmental and healthcare issues. LPSs are responsible for several infections, including septic and shock sepsis, and are found in water samples. Accurate and specific diagnosis of endotoxin is one of the most challenging issues in medical bacteriology. Enzyme-linked immunosorbent assay (ELISA), plating and culture-based methods, and Limulus amebocyte lysate (LAL) assay are the conventional techniques in quantifying LPS in research and medical laboratories. However, these methods have been restricted due to their disadvantages, such as low sensitivity and time-consuming and complicated procedures. Therefore, the development of new and advanced methods is demanding, particularly in the biological and medical fields. Biosensor technology is an innovative method that developed extensively in the past decade. Biosensors are classified based on the type of transducer and bioreceptor. So in this review, various types of biosensors, such as optical (fluorescence, SERS, FRET, and SPR), electrochemical, photoelectrochemical, and electrochemiluminescence, on the biosensing of LPs were investigated. Also, the critical role of advanced nanomaterials on the performance of the above-mentioned biosensors is discussed. In addition, the application of different labels on the efficient usage of biosensors for LPS is surveyed comprehensively. Also, various bio-elements (aptamer, DNA, miRNA, peptide, enzyme, antibody, etc.) on the structure of the LPS biosensor are investigated. Finally, bio-analytical parameters that affect the performance of LPS biosensors are surveyed. Lipopolysaccharide (LPS) or endotoxin control is critical for environmental and healthcare issues.![]()
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Affiliation(s)
- Ahmad Mobed
- Aging Research Institute, Faculty of Medicine, Tabriz University of Medical Sciences, Iran
- Physical Medicine and Rehabilitation Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz 51664, Iran
| | - Mohammad Hasanzadeh
- Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz 51664, Iran
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Li Y, Yang X, Hou F, Chen D, Liu Y, Yu D, Ming D, Yang Y, Huang H. Near-Infrared-Fluorescent Probe for Turn-On Lipopolysaccharide Analysis Based on PEG-Modified Gold Nanorods with Plasmon-Enhanced Fluorescence. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57058-57066. [PMID: 34784169 DOI: 10.1021/acsami.1c19746] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lipopolysaccharide (LPS), as the major component of the outer membrane of Gram-negative bacteria, can trigger a variety of biological effects such as sepsis, septic shock, and even multiorgan failure. Herein, we developed a near-infrared-fluorescent probe for fluorescent turn-on analysis of LPS based on plasmon-enhanced fluorescence (PEF). Gold nanorods (Au NRs) modified polyethylene glycol (PEG) was used as PEF materials. Au NRs were prepared with different longitudinal surface plasmon resonance (LSPR), and their fluorescence enhancement was investigated. Three kinds of molecular weights (1000, 5000, and 10000) of polyethylene glycol (PEG) were employed to control the distance between the Au NRs and the fluorescence substances of cyanine 7 (Cy7). Experimental analysis showed that the enhancement was related to the spectral overlap between the plasmon resonance of Au NRs and the extinction/emission of fluorophore. The three-dimensional finite-difference time-domain (3D-FDTD) simulation further revealed that the enhancement was caused by local electric field enhancement. Furthermore, the probe was used for the ultrasensitive analysis of LPS with a detection limit of 3.85 ng/mL and could quickly distinguish the Gram-negative bacterium-Escherichia coli (E. coli) (with LPS in the membrane) from Gram-positive bacterium-Staphylococcus aureus (S. aureus) (without LPS), as well as quantitative determination of E. coli with a detection limit of 1.0 × 106 cfu/mL. These results suggested that the prepared probe has great potential for biomedical diagnosis and selective detection of LPS from different bacterial strains.
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Affiliation(s)
- Yiting Li
- College of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Xinyu Yang
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Fan Hou
- College of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Dong Chen
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Yifan Liu
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Dinghua Yu
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Dengming Ming
- College of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Yaqiong Yang
- College of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - He Huang
- College of Food and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
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Usha SP, Manoharan H, Deshmukh R, Álvarez-Diduk R, Calucho E, Sai VVR, Merkoçi A. Attomolar analyte sensing techniques (AttoSens): a review on a decade of progress on chemical and biosensing nanoplatforms. Chem Soc Rev 2021; 50:13012-13089. [PMID: 34673860 DOI: 10.1039/d1cs00137j] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Detecting the ultra-low abundance of analytes in real-life samples, such as biological fluids, water, soil, and food, requires the design and development of high-performance biosensing modalities. The breakthrough efforts from the scientific community have led to the realization of sensing technologies that measure the analyte's ultra-trace level, with relevant sensitivity, selectivity, response time, and sampling efficiency, referred to as Attomolar Analyte Sensing Techniques (AttoSens) in this review. In an AttoSens platform, 1 aM detection corresponds to the quantification of 60 target analyte molecules in 100 μL of sample volume. Herein, we review the approaches listed for various sensor probe design, and their sensing strategies that paved the way for the detection of attomolar (aM: 10-18 M) concentration of analytes. A summary of the technological advances made by the diverse AttoSens trends from the past decade is presented.
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Affiliation(s)
- Sruthi Prasood Usha
- Biomedical Engineering, Department of Applied Mechanics, Indian Institute of Technology Madras (IITM), India.
| | - Hariharan Manoharan
- Biomedical Engineering, Department of Applied Mechanics, Indian Institute of Technology Madras (IITM), India.
| | - Rehan Deshmukh
- Biomedical Engineering, Department of Applied Mechanics, Indian Institute of Technology Madras (IITM), India.
| | - Ruslan Álvarez-Diduk
- Nanobioelectronics & Biosensors Group, Institut Català de Nanociència i Nanotecnologia (ICN2), Campus UAB, Barcelona, Spain.
| | - Enric Calucho
- Nanobioelectronics & Biosensors Group, Institut Català de Nanociència i Nanotecnologia (ICN2), Campus UAB, Barcelona, Spain.
| | - V V R Sai
- Biomedical Engineering, Department of Applied Mechanics, Indian Institute of Technology Madras (IITM), India.
| | - Arben Merkoçi
- Nanobioelectronics & Biosensors Group, Institut Català de Nanociència i Nanotecnologia (ICN2), Campus UAB, Barcelona, Spain. .,ICREA, Institució Catalana de Recercai Estudis Avançats, Barcelona, Spain
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18
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Liu L, Han Z, An F, Gong X, Zhao C, Zheng W, Mei L, Zhou Q. Aptamer-based biosensors for the diagnosis of sepsis. J Nanobiotechnology 2021; 19:216. [PMID: 34281552 PMCID: PMC8287673 DOI: 10.1186/s12951-021-00959-5] [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: 04/30/2021] [Accepted: 07/09/2021] [Indexed: 12/15/2022] Open
Abstract
Sepsis, the syndrome of infection complicated by acute organ dysfunction, is a serious and growing global problem, which not only leads to enormous economic losses but also becomes one of the leading causes of mortality in the intensive care unit. The detection of sepsis-related pathogens and biomarkers in the early stage plays a critical role in selecting appropriate antibiotics or other drugs, thereby preventing the emergence of dangerous phases and saving human lives. There are numerous demerits in conventional detection strategies, such as high cost, low efficiency, as well as lacking of sensitivity and selectivity. Recently, the aptamer-based biosensor is an emerging strategy for reasonable sepsis diagnosis because of its accessibility, rapidity, and stability. In this review, we first introduce the screening of suitable aptamer. Further, recent advances of aptamer-based biosensors in the detection of bacteria and biomarkers for the diagnosis of sepsis are summarized. Finally, the review proposes a brief forecast of challenges and future directions with highly promising aptamer-based biosensors.
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Affiliation(s)
- Lubin Liu
- Institute for Translational Medicine, Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266003, China
- School of Stomatology, Qingdao University, Qingdao, 266003, China
| | - Zeyu Han
- Institute for Translational Medicine, Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266003, China
- School of Stomatology, Qingdao University, Qingdao, 266003, China
| | - Fei An
- Institute for Translational Medicine, Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266003, China
- School of Stomatology, Qingdao University, Qingdao, 266003, China
| | - Xuening Gong
- Institute for Translational Medicine, Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266003, China
- School of Stomatology, Qingdao University, Qingdao, 266003, China
| | - Chenguang Zhao
- Institute for Translational Medicine, Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266003, China
- School of Stomatology, Qingdao University, Qingdao, 266003, China
| | - Weiping Zheng
- Institute for Translational Medicine, Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266003, China
- School of Stomatology, Qingdao University, Qingdao, 266003, China
| | - Li Mei
- School of Stomatology, Qingdao University, Qingdao, 266003, China
| | - Qihui Zhou
- Institute for Translational Medicine, Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266003, China.
- School of Stomatology, Qingdao University, Qingdao, 266003, China.
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He L, Huang R, Xiao P, Liu Y, Jin L, Liu H, Li S, Deng Y, Chen Z, Li Z, He N. Current signal amplification strategies in aptamer-based electrochemical biosensor: A review. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.12.054] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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20
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Ma W, Liu L, Xu Y, Wang L, Chen L, Yan S, Shui L, Wang Z, Li S. A highly efficient preconcentration route for rapid and sensitive detection of endotoxin based on an electrochemical biosensor. Analyst 2021; 145:4204-4211. [PMID: 32459250 DOI: 10.1039/d0an00315h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An impedimetric aptasensor for the detection of endotoxin in a microfluidic chip was proposed, in which the Apt/AuNPs/SPCE sensing surface was fabricated in a screen-printed electrode with good biological activity and stability. The quantitative detection of endotoxin was accomplished by electrochemical impedance spectroscopy (EIS) measurement before and after exposing to samples. The impedance biosensor offers an ultrasensitive and selective detection of endotoxin down to 500 pg mL-1 with a wide linear range from 500 pg mL-1 to 200 ng mL-1. According to the Langmuir isotherm model, the interactions between the target molecules and the sensing surface had been analyzed and strong binding was concluded. Compared to the traditional static incubation methods, the microfluidic biosensor realizes the enrichment of endotoxin owing to the confined space and continuous flow nature, so that the lowest detection concentration is reduced from 5 ng mL-1 to 500 pg mL-1, which is much lower than the existing technology, and the total assay time is shortened from 1.0 h to 0.5 h. The proposed microfluidic impedance biosensor provides a new strategy for the design of an aptasensor to realize the rapid detection of target biomolecules with high sensitivity and it can be integrated into wearable medical devices due to its flexible properties.
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Affiliation(s)
- Wenrui Ma
- Key Disciplines Lab of Novel Micro-Nano Devices and System Technology & Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. and International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China
| | - Lulu Liu
- International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China and School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yi Xu
- Key Disciplines Lab of Novel Micro-Nano Devices and System Technology & Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. and School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China and International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China
| | - Li Wang
- Key Disciplines Lab of Novel Micro-Nano Devices and System Technology & Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. and International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China
| | - Li Chen
- Key Disciplines Lab of Novel Micro-Nano Devices and System Technology & Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. and International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China
| | - Sheng Yan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, P. R. China
| | - Lingling Shui
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Normal University, Guangzhou 510631, China
| | - Zhijun Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
| | - Shunbo Li
- Key Disciplines Lab of Novel Micro-Nano Devices and System Technology & Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. and International R & D center of Micro-nano Systems and New Materials Technology, Chongqing University, Shapingba, Chongqing 400044, China
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21
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Posha B, Kuttoth H, Sandhyarani N. Layer-by-Layer Assembly of Polycations and Polyanions for the Sensitive Detection of Endotoxin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:257-265. [PMID: 33356305 DOI: 10.1021/acs.langmuir.0c02852] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Bacterial endotoxin detection is an essential safety requisite in biomedical, food, and pharmaceutical industries. Endotoxin in a sufficient concentration on entering the human bloodstream causes detrimental effects such as septic shock, which can lead to death. Hence, the sensitive and selective detection of endotoxin also known as lipopolysaccharide (LPS) is of paramount importance. Herein, a layer-by-layer (LBL) assembly of gold-chitosan nanocomposite (CGNC)-poly(acrylic acid) (PAA)-polymyxin B (PmB) on gold (Au) electrode is employed for the sensitive and selective detection of endotoxin. The surface electric charge studies using dynamic contact mode electrostatic force microscopy (DC-EFM) revealed the successful formation of each layer on the Au electrode. The polycationic PmB is a specific bioreceptor of LPS, which binds with high affinity to the anionic groups of the carbohydrate portions of LPS molecules and facilitates the selective electrochemical detection. This surface modification method presented a sensitive and selective detection of endotoxin down to the attogram level.
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Affiliation(s)
- Biyas Posha
- Nanoscience Research Laboratory, School of Materials Science and Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India
| | - Haritha Kuttoth
- Nanoscience Research Laboratory, School of Materials Science and Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India
| | - N Sandhyarani
- Nanoscience Research Laboratory, School of Materials Science and Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India
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22
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Tian J, Mu Z, Wang J, Zhou J, Yuan Y, Bai L. Electrochemical aptasensor for ultrasensitive detection of lipopolysaccharide using silver nanoparticles decorated titanium dioxide nanotube/functionalized reduced graphene oxide as a new redox nanoprobe. Mikrochim Acta 2021; 188:31. [PMID: 33415459 DOI: 10.1007/s00604-020-04695-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 12/27/2020] [Indexed: 01/06/2023]
Abstract
A novel and relatively simple signal-off electrochemical aptasensor was constructed for highly sensitive detection of lipopolysaccharide (LPS). For the first time, silver nanoparticles (AgNPs) decorated titanium dioxide nanotube (TNT) was conjugated with polydiallyldimethylammonium chloride (PDDA) functionalized reduced graphene oxide (rGO) to form a new nanohybrid of Ag-TNT/P-rGO. This nanohybrid with a large specific surface area exhibited excellent electrochemical activity, which not only served as the sensing platform to immobilize LPS binding aptamer (LBA) but was also employed as the redox probe to monitor the change of the electrochemical signal. The electrochemical signal responses were measured by cyclic voltammetry (CV) in the potential range -0.3 to 0.5 V at a scan rate of 0.1 V/s. The proposed aptasensor exhibited acceptable stability, reproducibility, and specificity for LPS detection with a wide linear range from 17 fg/mL to 100 ng/mL. The limit of detection (LOD) was 5 fg/mL. Furthermore, the prepared aptasensor showed acceptable recovery ranging from 96% to 103%, and the RSD varied between 1.4% and 8.5% for determining LPS in real samples.Graphical abstract.
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Affiliation(s)
- Jiangman Tian
- Chongqing Research Center for Pharmaceutical Engineering, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Zhaode Mu
- Research Center for Pharmacodynamic Evaluation Engineering Technology of Chongqing, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Jie Wang
- Research Center for Pharmacodynamic Evaluation Engineering Technology of Chongqing, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Jing Zhou
- Chongqing Research Center for Pharmaceutical Engineering, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Yonghua Yuan
- Research Center for Pharmacodynamic Evaluation Engineering Technology of Chongqing, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Lijuan Bai
- Chongqing Research Center for Pharmaceutical Engineering, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, People's Republic of China.
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23
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Nanoplasmonic Biosensing Approach for Endotoxin Detection in Pharmaceutical Field. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9010010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The outer membrane of Gram-negative bacteria contains bacterial endotoxins known as Lipopolysaccharides (LPS). Owing to the strong immune responses induced in humans and animals, these large molecules have a strong toxic effect that can cause severe fever, hypotension, shock, and death. Endotoxins are often present in the environment and medical implants and represent undesirable contaminations of pharmaceutical preparations and medical devices. To overcome the limitations of the standard technique, novel methods for early and sensitive detection of LPS will be of crucial importance. In this work, an interesting approach for the sensitive detection of LPS has been realized by exploiting optical features of nanoplasmonic transducers supporting Localized Surface Plasmon Resonances (LSPRs). Ordered arrays of gold nano-prisms and nano-disks have been realized by nanospheres lithography. The realized transducers have been integrated into a simple and miniaturized lab-on-a-chip (LOC) platform and functionalized with specific antibodies as sensing elements for the detection of LPS. Interactions of specific antibodies anchored on protein A-modified sensor chips with the investigated analyte resulted in a spectral shift in the plasmonic resonance peak of the transducers. A good linear relationship between peak shifts and the LPS concentration has been demonstrated for the fabricated nano-structures with a detection limit down to 5 ng/mL. Integration with a proper microfluidic platform demonstrates the possibility of yielding a prototypal compact device to be used as an analytical test for quality determination of pharmaceutical products.
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24
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Li W. Prospective Application of Aptamer-based Assays and Therapeutics in Bloodstream Infections. Mini Rev Med Chem 2020; 20:831-840. [PMID: 32048971 DOI: 10.2174/1389557520666200212105813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 01/22/2020] [Accepted: 01/22/2020] [Indexed: 11/22/2022]
Abstract
Sepsis is still a severe health problem worldwide with high morbidity and mortality. Blood bacterial culture remains the gold standard for the detection of pathogenic bacteria in bloodstream infections, but it is time-consuming, and both the sophisticated equipment and well-trained personnel are required. Immunoassays and genetic diagnosis are expensive and limited to specificity and sensitivity. Aptamers are single-stranded deoxyribonucleic acid (ssDNA) and ribonucleic acid (RNA) oligonucleotide or peptide sequence generated in vitro based on the binding affinity of aptamer-target by a process known as Systematic Evolution of Ligands by Exponential Enrichment (SELEX). By taking several advantages over monoclonal antibodies and other conventional small-molecule therapeutics, such as high specificity and affinity, negligible batch-to-batch variation, flexible modification and production, thermal stability, low immunogenicity and lack of toxicity, aptamers are presently becoming promising novel diagnostic and therapeutic agents. This review describes the prospective application of aptamerbased laboratory diagnostic assays and therapeutics for pathogenic bacteria and toxins in bloodstream infections.
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Affiliation(s)
- Weibin Li
- Institute for Laboratory Medicine, 900th Hospital of Joint Service Corps, PLA, China.,Laboratory Department of Fujian Medical University, No. 156 North Xi-er Huan Road, Fuzhou City, Fujian Province, Fuzhou 350025, China
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25
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Impedimetric Aptamer-Based Biosensors: Applications. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2020; 174:43-91. [PMID: 32313965 DOI: 10.1007/10_2020_125] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Impedimetric aptamer-based biosensors show high potential for handheld devices and point-of-care tests. In this review, we report on recent advances in aptamer-based impedimetric biosensors for applications in biotechnology. We detail on analytes relevant in medical and environmental biotechnology as well as food control, for which aptamer-based impedimetric biosensors were developed. The reviewed biosensors are examined for their performance, including sensitivity, selectivity, response time, and real sample validation. Additionally, the benefits and challenges of impedimetric aptasensors are summarized.
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Siller IG, Preuss JA, Urmann K, Hoffmann MR, Scheper T, Bahnemann J. 3D-Printed Flow Cells for Aptamer-Based Impedimetric Detection of E. coli Crooks Strain. SENSORS 2020; 20:s20164421. [PMID: 32784793 PMCID: PMC7472219 DOI: 10.3390/s20164421] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/03/2020] [Accepted: 08/05/2020] [Indexed: 01/16/2023]
Abstract
Electrochemical spectroscopy enables rapid, sensitive, and label-free analyte detection without the need of extensive and laborious labeling procedures and sample preparation. In addition, with the emergence of commercially available screen-printed electrodes (SPEs), a valuable, disposable alternative to costly bulk electrodes for electrochemical (bio-)sensor applications was established in recent years. However, applications with bare SPEs are limited and many applications demand additional/supporting structures or flow cells. Here, high-resolution 3D printing technology presents an ideal tool for the rapid and flexible fabrication of tailor-made, experiment-specific systems. In this work, flow cells for SPE-based electrochemical (bio-)sensor applications were designed and 3D printed. The successful implementation was demonstrated in an aptamer-based impedimetric biosensor approach for the detection of Escherichia coli (E. coli) Crooks strain as a proof of concept. Moreover, further developments towards a 3D-printed microfluidic flow cell with an integrated micromixer also illustrate the great potential of high-resolution 3D printing technology to enable homogeneous mixing of reagents or sample solutions in (bio-)sensor applications.
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Affiliation(s)
- Ina G. Siller
- Institute of Technical Chemistry, Leibniz University Hannover, Callinstraße 5, 30167 Hannover, Germany; (I.G.S.); (J.-A.P.); (T.S)
| | - John-Alexander Preuss
- Institute of Technical Chemistry, Leibniz University Hannover, Callinstraße 5, 30167 Hannover, Germany; (I.G.S.); (J.-A.P.); (T.S)
| | - Katharina Urmann
- Department of Environmental Science and Engineering, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA; (K.U.); (M.R.H.)
| | - Michael R. Hoffmann
- Department of Environmental Science and Engineering, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA; (K.U.); (M.R.H.)
| | - Thomas Scheper
- Institute of Technical Chemistry, Leibniz University Hannover, Callinstraße 5, 30167 Hannover, Germany; (I.G.S.); (J.-A.P.); (T.S)
| | - Janina Bahnemann
- Institute of Technical Chemistry, Leibniz University Hannover, Callinstraße 5, 30167 Hannover, Germany; (I.G.S.); (J.-A.P.); (T.S)
- Correspondence: ; Tel.: +49-511-762-2568
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27
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Fu X, Lin X, Ren X, Wu R, Liu C, Huang J. The synthesis and structure of the [PdAu 13(PPh 3) 3(SR) 7] + nanocluster. NANOSCALE 2020; 12:11825-11829. [PMID: 32458944 DOI: 10.1039/d0nr01356k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal alloy nanoclusters have attracted increasing attention due to the synergistic effect of the foreign atoms. For the first time the synthesis and crystal structure of the [PdAu13(PPh3)3(SR)7]+ nanocluster is reported. The crystal structure of the nanocluster was determined by single crystal X-ray diffraction. The [PdAu13(PPh3)3(SR)7]+ nanocluster has a concave polyhedron Au9Pd kernel, which looks like a girl dancing ballet. The structure shows that [PdAu13(PPh3)3(SR)7]+ has an open shell. Meanwhile, we also carried out ultraviolet-visible (Uv-vis) absorption spectroscopy and fluorescence spectroscopy to study the optical properties of the [PdAu13(PPh3)3(SR)7]+ nanocluster.
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Affiliation(s)
- Xuemei Fu
- Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xinzhang Lin
- Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiuqing Ren
- Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Ren'an Wu
- Laboratory of High-Resolution Mass Spectrometry Technologies, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Chao Liu
- Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Jiahui Huang
- Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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Posha B, Sandhyarani N. Highly sensitive endotoxin detection using a gold nanoparticle loaded layered molybdenum disulfide-polyacrylic acid nanocomposite. Analyst 2020; 145:3939-3947. [PMID: 32314985 DOI: 10.1039/d0an00567c] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Endotoxins or lipopolysaccharides (LPS) are pathogens released from the outer membrane of gram-negative bacteria which produce toxic effects on humans. The sensitive and selective detection of LPS is in high demand, especially in the field of medical supplies, therapeutics and in the food industry. Herein we report a new nano-probe based on a gold nanoparticle loaded, water-soluble layered molybdenum disulfide-polyacrylic acid (Au/MoS2-PAA) nanocomposite as a label-free voltammetric aptasensor for ultrasensitive LPS detection. MoS2 nanosheets were obtained through one-step sonication assisted exfoliation of bulk MoS2 with polyacrylic acid (PAA). Au nanoparticles were incorporated into the MoS2-PAA nanocomposite and thiol terminated LPS binding aptamers (LBA) were immobilized on this. The specific binding of LPS with LBA is investigated electrochemically by differential pulse voltammetry. The apparent binding constant (Kb) of LPS with LBA has been calculated to be 1.53 × 102 mL g-1. The aptasensor demonstrated LPS detection down to the ag mL-1 level without incorporating any redox mediator and showed wide linearity from 100 ag mL-1 to 100 pg mL-1 with a low limit of detection of 29 ag mL-1. The sensor showed excellent recovery upon spiking LPS in clinical grade insulin, suggesting that LBA/Au/MoS2-PAA/GCE has promising application for the trace analysis of LPS in the field of pharmaceutical products.
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Affiliation(s)
- Biyas Posha
- Nanoscience Research Laboratory, School of Materials Science and Engineering, National Institute of Technology, Calicut-673601, Kerala, India.
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Huang L, Tao H, Zhao S, Yang K, Cao QY, Lan M. A Tetraphenylethylene-Based Aggregation-Induced Emission Probe for Fluorescence Turn-on Detection of Lipopolysaccharide in Injectable Water with Sensitivity Down to Picomolar. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01408] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Li Huang
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Hui Tao
- Department of Chemistry, Nanchang University, Nanchang 330031, P. R. China
| | - Shaojing Zhao
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Ke Yang
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Qian-Yong Cao
- Department of Chemistry, Nanchang University, Nanchang 330031, P. R. China
| | - Minhuan Lan
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
- Shenzhen Research Institute of Central South University, Shenzhen 518057, P. R. China
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Yan SR, Foroughi MM, Safaei M, Jahani S, Ebrahimpour N, Borhani F, Rezaei Zade Baravati N, Aramesh-Boroujeni Z, Foong LK. A review: Recent advances in ultrasensitive and highly specific recognition aptasensors with various detection strategies. Int J Biol Macromol 2020; 155:184-207. [PMID: 32217120 DOI: 10.1016/j.ijbiomac.2020.03.173] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 03/03/2020] [Accepted: 03/19/2020] [Indexed: 12/17/2022]
Abstract
One of the most studied topics in analytical chemistry and physics is to develop bio-sensors. Aptamers are small single-stranded RNA or DNA oligonucleotides (5-25 kDa), which have advantages in comparison to their antibodies such as physicochemical stability and high binding specificity. They are able to integrate with proteins or small molecules, including intact viral particles, plant lectins, gene-regulation factor, growth factors, antibodies and enzymes. The aptamers have reportedly shown some unique characteristics, including long shelf-life, simple modification to provide covalent bonds to material surfaces, minor batch variation, cost-effectiveness and slight denaturation susceptibility. These features led important efforts toward the development of aptamer-based sensors, known as apta-sensors classified into optical, electrical and mass-sensitive based on the signal transduction mode. This review provided a number of current advancements in selecting, development criteria, and aptamers application with the focus on the effect of apta-sensors, specifically for disease-associated analyses. The review concentrated on the current reports of apta-sensors that are used for evaluating different food and environmental pollutants.
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Affiliation(s)
- Shu-Rong Yan
- Institute of Smart Finance, Yango University, Fuzhou 350015, China
| | | | - Mohadeseh Safaei
- Student Research Committee, School of Public Health, Bam University of Medical Sciences, Bam, Iran
| | - Shohreh Jahani
- Student Research Committee, School of Public Health, Bam University of Medical Sciences, Bam, Iran; Bam University of Medical Sciences, Bam, Iran
| | - Nasser Ebrahimpour
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Fariba Borhani
- Cancer Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Zahra Aramesh-Boroujeni
- Department of Clinical Laboratory, AlZahra Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Loke Kok Foong
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam.
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Sondhi P, Maruf MHU, Stine KJ. Nanomaterials for Biosensing Lipopolysaccharide. BIOSENSORS-BASEL 2019; 10:bios10010002. [PMID: 31877825 PMCID: PMC7168309 DOI: 10.3390/bios10010002] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 12/20/2022]
Abstract
Lipopolysaccharides (LPS) are endotoxins, hazardous and toxic inflammatory stimulators released from the outer membrane of Gram-negative bacteria, and are the major cause of septic shock giving rise to millions of fatal illnesses worldwide. There is an urgent need to identify and detect these molecules selectively and rapidly. Pathogen detection has been done by traditional as well as biosensor-based methods. Nanomaterial based biosensors can assist in achieving these goals and have tremendous potential. The biosensing techniques developed are low-cost, easy to operate, and give a fast response. Due to extremely small size, large surface area, and scope for surface modification, nanomaterials have been used to target various biomolecules, including LPS. The sensing mechanism can be quite complex and involves the transformation of chemical interactions into amplified physical signals. Many different sorts of nanomaterials such as metal nanomaterials, magnetic nanomaterials, quantum dots, and others have been used for biosensing of LPS and have shown attractive results. This review considers the recent developments in the application of nanomaterials in sensing of LPS with emphasis given mainly to electrochemical and optical sensing.
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Pourmadadi M, Shayeh JS, Omidi M, Yazdian F, Alebouyeh M, Tayebi L. A glassy carbon electrode modified with reduced graphene oxide and gold nanoparticles for electrochemical aptasensing of lipopolysaccharides from Escherichia coli bacteria. Mikrochim Acta 2019; 186:787. [PMID: 31732807 DOI: 10.1007/s00604-019-3957-9] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 10/17/2019] [Indexed: 12/01/2022]
Abstract
An electrochemical aptasensor is described for the voltammetric determination of lipopolysaccharide (LPS) from Escherichia coli 055:B5. Aptamer chains were immobilized on the surface of a glassy carbon electrode (GCE) via reduced graphene oxide and gold nanoparticles (RGO/AuNPs). Fast Fourier transform infrared, X-ray diffraction and transmission electron microscopy were used to characterize the nanomaterials. Cyclic voltammetry, square wave voltammetry and electrochemical impedance spectroscopy were used to characterize the modified GCE. The results show that the modified electrode has a good selectivity for LPS over other biomolecules. The hexacyanoferrate redox system, typically operated at around 0.3 V (vs. Ag/AgCl) is used as an electrochemical probe. The detection limit is 30 fg·mL-1. To decrease the electrochemical potential for detection of LPS, Mg/carbon quantum dots were used as redox active media. They decrease the detection potentialto 0 V and the detection of limit (LOD) to 1 fg·mL-1. The electrode was successfully used to analyze serum of patients and healthy persons. Graphical abstractSchematic representation of the modification of reduced graphene oxide gold nanoparticles with aptamer chains to immobilize on the glassy carbon electrode surface for electrochemical detection of lipopolysaccharides.
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Affiliation(s)
- Mehrab Pourmadadi
- Protein Research Center, Shahid Beheshti University, Tehran, GC, 1983963113, Iran
| | - Javad Shabani Shayeh
- Protein Research Center, Shahid Beheshti University, Tehran, GC, 1983963113, Iran.
| | - Meisam Omidi
- Protein Research Center, Shahid Beheshti University, Tehran, GC, 1983963113, Iran
| | - Fatemeh Yazdian
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran, 1417466191, Iran
| | - Masoud Alebouyeh
- Pediatric Infections Research Center, Research Institute for Children's Health, Shahid Beheshti University of Medical Sciences, Tehran, 19839-63113, Iran
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, WI, 53233, USA
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Plasmonic biosensors for bacterial endotoxin detection on biomimetic C-18 supported fiber optic probes. Biosens Bioelectron 2019; 129:79-86. [DOI: 10.1016/j.bios.2018.12.045] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 12/18/2018] [Accepted: 12/21/2018] [Indexed: 01/14/2023]
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Ye H, Duan N, Gu H, Wang H, Wang Z. Fluorometric determination of lipopolysaccharides via changes of the graphene oxide-enhanced fluorescence polarization caused by truncated aptamers. Mikrochim Acta 2019; 186:173. [PMID: 30771102 DOI: 10.1007/s00604-019-3261-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 01/16/2019] [Indexed: 12/21/2022]
Abstract
A broad-spectrum ssDNA aptamer containing 80 nucleotides (LA80) and capable of binding to four different sources of lipopolysaccharides (LPSs) was truncated. Two strategies are used to produce truncated aptamers of different length. The results show that LA27, a 27-nt aptamer, retained broad-spectrum capability and has a higher affinity (Kd = 46.2 ± 9.5 nM). A graphene oxide based fluorescence polarization assay (excitation/emission wavelengths: 485/520 nm) was worked out using FAM-labeled LA27. It can detect LPSs from Salmonella entericaserotype typhimurium, Pseudomonas aeruginosa 10 and Escherichia coli 055:B5 with enhanced performance (4.8 to 29-fold improvements) compared to LA80. The assay can be performed within 30 min, and the detection limits are 38.7, 88.0 and 154 ng·mL-1, respectively. Graphical abstract Schematic presentation of the assay: A shorter aptamer, with higher affinity than its original aptamer, was obtained by truncated strategies. This core aptamer lead to release easily and enhance the sensivity of the GO-based fluorescence polarization assay.
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Affiliation(s)
- Hua Ye
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- College of Food Engineering, Anhui Science and Technology University, Fengyang, 233100, China
| | - Nuo Duan
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Huajie Gu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- School of Chemical Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Haitao Wang
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China.
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, China.
- Collaborative Innovation Center of Food safety and Quality Control of Jiangsu Province, Jiangnan University, Wuxi, 214122, China.
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Wen LX, Lv JJ, Chen L, Li SB, Mou XJ, Xu Y. A fluorescent probe composed of quantum dot labeled aptamer and graphene oxide for the determination of the lipopolysaccharide endotoxin. Mikrochim Acta 2019; 186:122. [PMID: 30666423 DOI: 10.1007/s00604-018-3218-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Accepted: 12/28/2018] [Indexed: 01/28/2023]
Abstract
Endotoxins are complex lipopolysaccharides (LPS) and key components of the outer cell membrane of Gram-negative bacteria. The authors report on a fluorescent aptamer-based probe for the determination of LPS of Gram-negative bacteria. An aptamer against LPS was fluorescently labeled with CdSe/ZnS quantum dots. Its emission is quenched on addition of graphene oxide (GO). On addition of LPS, the aptamer binds LPS and GO is released. This results in the recovery of fluorescence, typically measured at excitation/emission wavelengths of 495/543 nm. The probe responds to LPS in the 10-500 ng·mL-1 concentration range, and the detection limit is 8.7 ng·mL-1. It can be used for selective detection of LPS from different Gram-negative bacteria, in the presence of biological interferents. Graphical abstract Schematic presentation of a green fluorescent probe comprised of an aptamer labelled with CdSe/ZnS quantum dots and of graphene oxide. Lipopolysaccharides bind to the aptamer and release graphene oxide to result in fluorescence recovery, which is measured at an emission wavelength 543 nm.
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Affiliation(s)
- Lu-Xin Wen
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, China
- National Center for International Research of Micro/Nano-System and New Material Technology, Chongqing University, Chongqing, 400030, China
| | - Jun-Jiang Lv
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China.
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, China.
- Collaborative Innovation Center for Brain Science, Chongqing University, Chongqing, 400030, People's Republic of China.
| | - Li Chen
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China
- National Center for International Research of Micro/Nano-System and New Material Technology, Chongqing University, Chongqing, 400030, China
| | - Shun-Bo Li
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China
- National Center for International Research of Micro/Nano-System and New Material Technology, Chongqing University, Chongqing, 400030, China
| | - Xiao-Jing Mou
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China
- National Center for International Research of Micro/Nano-System and New Material Technology, Chongqing University, Chongqing, 400030, China
| | - Yi Xu
- Key Disciplines Lab of Novel Micro-nano Devices and System Technology, Chongqing University, Chongqing, 400030, China.
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, China.
- National Center for International Research of Micro/Nano-System and New Material Technology, Chongqing University, Chongqing, 400030, China.
- Collaborative Innovation Center for Brain Science, Chongqing University, Chongqing, 400030, People's Republic of China.
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Wang N, Dai H, Sai L, Ma H, Lin M. Copper ion-assisted gold nanoparticle aggregates for electrochemical signal amplification of lipopolysaccharide sensing. Biosens Bioelectron 2018; 126:529-534. [PMID: 30476884 DOI: 10.1016/j.bios.2018.11.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 11/14/2018] [Accepted: 11/14/2018] [Indexed: 12/31/2022]
Abstract
A signal amplification electrochemical aptasensor for ultrasensitive detection of lipopolysaccharide (LPS) was fabricated. The sensor was constructed with a probe of LPS aptamer and a copper ions-mediated gold nanoparticles aggregate (Cu/Au NA) as a signal amplification material. The Cu/Au NAs comprising copper ions (Cu2+) and L-cysteine modified AuNPs were fabricated by a self-assembly process. For functionalization of the electrode, the carboxylic group of a mercaptoacetic acid self-assembly layer was covalently coupled with the amine group of the aptamer. The aptamer with high specificity and affinity can effectively gather the dissociative LPS firstly, and the Cu/Au NAs were captured by anionic groups of the carbohydrate portions from LPS molecules based on the specific interactions. With the employment of the sandwich-type biosensor, the strategy can significantly amplify the electrochemical signal for determination of trace amount of LPS. The sensing performance of the electrochemical sensor was investigated by differential pulse voltammetry (DPV) and the stripping peak currents of Cu re-oxidized to Cu2+ was used to monitor the level of LPS. The electrochemical aptasensor exhibited excellent sensitivity toward LPS with a detection limit of 0.033 pg/mL (S/N = 3). The biosensor also exhibited a high specificity toward LPS in the presence of other common interfering substances and was easily regenerated. Furthermore, the fabricated biosensor showed a good practical application for LPS determination in human serum samples.
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Affiliation(s)
- Nan Wang
- Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Hongxiu Dai
- Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China; Department of Chemistry, Liaocheng University, Liaocheng 252059, China
| | - Lintao Sai
- Department of Infectious Diseases, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Houyi Ma
- Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Meng Lin
- Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
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37
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Alizadeh N, Salimi A. Ultrasensitive Bioaffinity Electrochemical Sensors: Advances and New Perspectives. ELECTROANAL 2018. [DOI: 10.1002/elan.201800598] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Negar Alizadeh
- Department of ChemistryUniversity of Kurdistan 66177-15175 Sanandaj Iran
| | - Abdollah Salimi
- Department of ChemistryUniversity of Kurdistan 66177-15175 Sanandaj Iran
- Research Center for NanotechnologyUniversity of Kurdistan 66177-15175 Sanandaj Iran
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