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Das T, Das S, A BC. Fabrication of a Label-Free Immunosensor Using Surface-Engineered AuPt@GQD Core-Shell Nanocomposite for the Selective Detection of Trace Levels of Escherichia coli from Contaminated Food Samples. ACS Biomater Sci Eng 2024; 10:4018-4034. [PMID: 38816970 DOI: 10.1021/acsbiomaterials.4c00297] [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: 06/01/2024]
Abstract
Fabrication of label-free immunosensors is highly necessitated due to their simplicity, cost-effectiveness, and robustness. Herein, we report the facile development of a label-free, direct, rapid, capacitive immunosensor for ultrasensitive and rapid recognition of trace levels of Escherichia coli from contaminated food samples. This was achieved using gold platinum core-shell nanoparticles loaded with graphene quantum dots (AuPt@GQDs) that were utilized as electrode modifiers. The incorporation of GQDs to the surface of AuPt core-shell nanoparticles was performed using the "greener" probe-sonication method. The electrochemical properties of AuPt@GQDs, determined using cyclic voltammetry and electrochemical impedance spectroscopy, suggested the optimized loading concentration of AuPt to be 0.05% in the core-shell nanocomposite to exhibit the highest current response. Furthermore, immobilization of anti-E. coli monoclonal antibodies (anti-E. coli mAb) onto the surface of modified electrodes was performed using amine coupling. The high specific binding of E. coli cells onto the surface of the immuno-electrode was measured as a direct function of change in transient capacitance with time that was measured at low and high frequencies. The resultant immunosensor (bovine serum albumin/anti-E. coli mAb/AuPt0.05@GQDs/FTO) demonstrated a detection range (5 to 4.5 × 103 cells/mL), with the detection limit as low as 1.5 × 102 cells/mL, and an excellent sensitivity ∼171,281.40 μF-1 mL cells-1 cm-2 without the use of any labels (R2-0.99). These findings were further verified using real sample analysis wherein the immuno-electrode demonstrated outstanding sensitivity, the highest noticed so far. More interestingly, the high resuability ∼48 weeks (RSD-5.92%) and excellent reproducibility in detection results (RSD ∼ 9.5%) testify its potential use in a clinical setting. The results reveal the usefulness of the surface-engineered AuPt@GQDs core-shell nanocomposite as an electrode modifier that can be used for the development of newer on-site monitoring devices to estimate trace levels of pathogens present as contaminants in food samples.
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Affiliation(s)
- Tushar Das
- Department of Chemistry, National Institute of Technology Patna, Bihar 800005, India
| | - Subrata Das
- Department of Chemistry, National Institute of Technology Patna, Bihar 800005, India
| | - Betty C A
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400085, India
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Xing Z, Guo J, Wu Z, He C, Wang L, Bai M, Liu X, Zhu B, Guan Q, Cheng C. Nanomaterials-Enabled Physicochemical Antibacterial Therapeutics: Toward the Antibiotic-Free Disinfections. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2303594. [PMID: 37626465 DOI: 10.1002/smll.202303594] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/17/2023] [Indexed: 08/27/2023]
Abstract
Bacterial infection continues to be an increasing global health problem with the most widely accepted treatment paradigms restricted to antibiotics. However, the overuse and misuse of antibiotics have triggered multidrug resistance of bacteria, frustrating therapeutic outcomes, and leading to higher mortality rates. Even worse, the tendency of bacteria to form biofilms on living and nonliving surfaces further increases the difficulty in confronting bacteria because the extracellular matrix can act as a robust barrier to prevent the penetration of antibiotics and resist environmental damage. As a result, the inability to eliminate bacteria and biofilms often leads to persistent infection, implant failure, and device damage. Therefore, it is of paramount importance to develop alternative antimicrobial agents while avoiding the generation of bacterial resistance to prevent the large-scale growth of bacterial resistance. In recent years, nano-antibacterial materials have played a vital role in the antibacterial field because of their excellent physical and chemical properties. This review focuses on new physicochemical antibacterial strategies and versatile antibacterial nanomaterials, especially the mechanism and types of 2D antibacterial nanomaterials. In addition, this advanced review provides guidance on the development direction of antibiotic-free disinfections in the antibacterial field in the future.
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Affiliation(s)
- Zhenyu Xing
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Jiusi Guo
- Department of Orthodontics, Department of Endodontics, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Zihe Wu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Chao He
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Liyun Wang
- Department of Medical Ultrasound, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Mingru Bai
- Department of Orthodontics, Department of Endodontics, State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xikui Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Bihui Zhu
- Department of Medical Ultrasound, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Qiuyue Guan
- Department of Geriatrics, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China
| | - Chong Cheng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
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Zhu M, Liu J, Jiang X, Zhang Y, Zhang J, Wu J. Bacteria-imprinted impedimetric sensor based on doping-induced nanostructured polypyrrole for determination of Escherichia coli. Mikrochim Acta 2023; 190:431. [PMID: 37804429 DOI: 10.1007/s00604-023-06008-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 09/19/2023] [Indexed: 10/09/2023]
Abstract
A simple and label-free bacteria-imprinted impedimetric (BIP) sensor for the sensitive measurement of Escherichia coli has been developed. The BIP sensor is fabricated by one-step electropolymerization of pyrrole (functional monomer), copper phthalocyanine-3, 4', 4'', 4'''-tetrasulfonic acid tetrasodium salt (CuPcTs, dopant), and target bacteria (E. coli O157:H7) on a glassy carbon electrode. After the removal of the bacterial template, the established imprinted sites on the CuPcTs-doped polypyrrole film (PPy/CuPcTs) enable the highly selective rebinding of target bacteria and the resulting impedance change of the sensing interface is used to detect the target bacteria. We found that during the electropolymerization process, CuPcTs induced pyrrole to form granular-like nanostructured PPy/CuPcTs with excellent conductivity compared with the PPy film, substantially improving the sensitivity of the proposed sensor. The sensor presented a wide detection range (102 ~ 107 CFU⋅mL-1, RSD 1.1% ~ 3.5%) with a limit of detection of 21 CFU⋅mL-1. Furthermore, the proposed sensor effectively distinguished E. coli O157:H7 from other non-target bacteria and exhibited good practicality with recoveries from 91 to 103% in spiked real samples, indicating the potential utility of the sensor in food safety and environmental monitoring.
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Affiliation(s)
- Min Zhu
- Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, Shanghai Ocean University, Shanghai, 201306, China
| | - Jie Liu
- Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, Shanghai Ocean University, Shanghai, 201306, China
| | - Xuyan Jiang
- Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, Shanghai Ocean University, Shanghai, 201306, China
| | - Yanan Zhang
- Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, Shanghai Ocean University, Shanghai, 201306, China
| | - Junling Zhang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education; Shanghai Collaborative Innovation Center for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, No. 999, Hucheng Ring Road, Pudong New Area, Shanghai, 201306, China.
| | - Jikui Wu
- Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, Shanghai Ocean University, Shanghai, 201306, China.
- Laboratory of Quality and Safety Risk Assessment for Aquatic Product on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai Ocean University, No. 999, Hucheng Ring Road, Pudong New Area, Shanghai, 201306, China.
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Development of Gold Nanoparticles Decorated Molecularly Imprinted–Based Plasmonic Sensor for the Detection of Aflatoxin M1 in Milk Samples. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9120363] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Aflatoxins are a group of extremely toxic and carcinogenic substances generated by the mold of the genus Aspergillus that contaminate agricultural products. When dairy cows ingest aflatoxin B1 (AFB1)−contaminated feeds, it is metabolized and transformed in the liver into a carcinogenic major form of aflatoxin M1 (AFM1), which is eliminated through the milk. The detection of AFM1 in milk is very important to be able to guarantee food safety and quality. In recent years, sensors have emerged as a quick, low–cost, and reliable platform for the detection of aflatoxins. Plasmonic sensors with molecularly imprinted polymers (MIPs) can be interesting alternatives for the determination of AFM1. In this work, we designed a molecularly–imprinted–based plasmonic sensor to directly detect lower amounts of AFM1 in raw milk samples. For this purpose, we prepared gold–nanoparticle–(AuNP)−integrated polymer nanofilm on a gold plasmonic sensor chip coated with allyl mercaptan. N−methacryloyl−l−phenylalanine (MAPA) was chosen as a functional monomer. The MIP nanofilm was prepared using the light–initiated polymerization of MAPA and ethylene glycol dimethacrylate in the presence of AFM1 as a template molecule. The developed method enabled the detection of AFM1 with a detection limit of 0.4 pg/mL and demonstrated good linearity (0.0003 ng/mL–20.0 ng/mL) under optimized experimental conditions. The AFM1 determination was performed in random dairy farmer milk samples. Using the analogous mycotoxins, it was also demonstrated that the plasmonic sensor platforms were specific to the detection of AFM1.
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Sande MG, Rodrigues JL, Ferreira D, Silva CJ, Rodrigues LR. Novel Biorecognition Elements against Pathogens in the Design of State-of-the-Art Diagnostics. BIOSENSORS 2021; 11:bios11110418. [PMID: 34821636 PMCID: PMC8615483 DOI: 10.3390/bios11110418] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/20/2021] [Accepted: 10/22/2021] [Indexed: 05/21/2023]
Abstract
Infectious agents, especially bacteria and viruses, account for a vast number of hospitalisations and mortality worldwide. Providing effective and timely diagnostics for the multiplicity of infectious diseases is challenging. Conventional diagnostic solutions, although technologically advanced, are highly complex and often inaccessible in resource-limited settings. An alternative strategy involves convenient rapid diagnostics which can be easily administered at the point-of-care (POC) and at low cost without sacrificing reliability. Biosensors and other rapid POC diagnostic tools which require biorecognition elements to precisely identify the causative pathogen are being developed. The effectiveness of these devices is highly dependent on their biorecognition capabilities. Naturally occurring biorecognition elements include antibodies, bacteriophages and enzymes. Recently, modified molecules such as DNAzymes, peptide nucleic acids and molecules which suffer a selective screening like aptamers and peptides are gaining interest for their biorecognition capabilities and other advantages over purely natural ones, such as robustness and lower production costs. Antimicrobials with a broad-spectrum activity against pathogens, such as antibiotics, are also used in dual diagnostic and therapeutic strategies. Other successful pathogen identification strategies use chemical ligands, molecularly imprinted polymers and Clustered Regularly Interspaced Short Palindromic Repeats-associated nuclease. Herein, the latest developments regarding biorecognition elements and strategies to use them in the design of new biosensors for pathogens detection are reviewed.
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Affiliation(s)
- Maria G. Sande
- CEB—Centre of Biological Engineering, Campus de Gualtar, Universidade do Minho, 4710-057 Braga, Portugal; (M.G.S.); (J.L.R.); (D.F.)
| | - Joana L. Rodrigues
- CEB—Centre of Biological Engineering, Campus de Gualtar, Universidade do Minho, 4710-057 Braga, Portugal; (M.G.S.); (J.L.R.); (D.F.)
| | - Débora Ferreira
- CEB—Centre of Biological Engineering, Campus de Gualtar, Universidade do Minho, 4710-057 Braga, Portugal; (M.G.S.); (J.L.R.); (D.F.)
| | - Carla J. Silva
- CENTI—Center for Nanotechnology and Smart Materials, Rua Fernando Mesquita 2785, 4760-034 Vila Nova de Famalicão, Portugal;
- CITEVE—Technological Center for the Textile and Clothing Industries of Portugal, Rua Fernando Mesquita 2785, 4760-034 Vila Nova de Famalicão, Portugal
| | - Ligia R. Rodrigues
- CEB—Centre of Biological Engineering, Campus de Gualtar, Universidade do Minho, 4710-057 Braga, Portugal; (M.G.S.); (J.L.R.); (D.F.)
- Correspondence: ; Tel.: +351-253601978
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Huang Y, Su Z, Li W, Ren J. Recent Progresses on Biosensors for Escherichia coli Detection. FOOD ANAL METHOD 2021. [DOI: 10.1007/s12161-021-02129-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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7
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Pan T, Shan X, Jiang D, Qi L, Wang W, Chen Z. Fluorometric Aptasensor for Determination of Escherichia coli O157:H7 by FRET Effect between Aminated Carbon Quantum Dots and Graphene Oxide. ANAL SCI 2021; 37:833-838. [PMID: 33041308 DOI: 10.2116/analsci.20p306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A fluorometric aptasensor based on Escherichia coli O157:H7 (E. coli O157:H7) aptamer labeled aminated carbon quantum dots (NH2-CQDs) and graphene oxide (GO) for the determination of E. coli O157:H7 was developed. In this research, carboxyl group (-COOH) terminated E. coli O157:H7 aptamer was steadily labeled to NH2-CQDs by amidation reaction, and played the role of energy donor and was responsible for chemical recognition. Correspondingly, GO served as an energy acceptor. The introduction of NH2-CQDs not only made the aptamer bond stably through covalent bond, but also significantly enhanced the fluorescence intensity compared with general CQDs. The NH2-CQDs-aptamer is adsorbed on the surface of GO through π-π stacking and hydrophobic interaction. The fluorescence of NH2-CQDs-aptamer was quenched via fluorescence resonance energy transfer (FRET) between NH2-CQDs and GO. After adding E. coli O157:H7, the specific binding affinity between NH2-CQDs-aptamer and E. coli O157:H7 lead to desorption of NH2-CQDs-aptamer from GO, and recovery of the fluorescence intensity of NH2-CQDs-aptamer. Under the optimal conditions, the increased fluorescence intensity showed a good linear relationship to concentrations of E. coli O157:H7 in the range 102 - 107 cells/mL, with a detection limit of 89 cells/mL. Furthermore, the developed method was successfully applied to the determination of E. coli O157:H7 in commercial milk samples.
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Affiliation(s)
- Tao Pan
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
| | - Xueling Shan
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
| | - Ding Jiang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
| | - Lu Qi
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
| | - Wenchang Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
| | - Zhidong Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University
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8
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Arreguin-Campos R, Jiménez-Monroy KL, Diliën H, Cleij TJ, van Grinsven B, Eersels K. Imprinted Polymers as Synthetic Receptors in Sensors for Food Safety. BIOSENSORS 2021; 11:46. [PMID: 33670184 PMCID: PMC7916965 DOI: 10.3390/bios11020046] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/04/2021] [Accepted: 02/06/2021] [Indexed: 01/08/2023]
Abstract
Foodborne illnesses represent high costs worldwide in terms of medical care and productivity. To ensure safety along the food chain, technologies that help to monitor and improve food preservation have emerged in a multidisciplinary context. These technologies focus on the detection and/or removal of either biological (e.g., bacteria, virus, etc.) or chemical (e.g., drugs and pesticides) safety hazards. Imprinted polymers are synthetic receptors able of recognizing both chemical and biological contaminants. While numerous reviews have focused on the use of these robust materials in extraction and separation applications, little bibliography summarizes the research that has been performed on their coupling to sensing platforms for food safety. The aim of this work is therefore to fill this gap and highlight the multidisciplinary aspects involved in the application of imprinting technology in the whole value chain ranging from IP preparation to integrated sensor systems for the specific recognition and quantification of chemical and microbiological contaminants in food samples.
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Affiliation(s)
| | | | | | | | | | - Kasper Eersels
- Sensor Engineering Department, Faculty of Science and Engineering, Maastricht University, P.O. Box 616,6200 MD Maastricht, The Netherlands; (R.A.-C.); (K.L.J.-M.); (H.D.); (T.J.C.); (B.v.G.)
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Zhang J, Wang Y, Lu X. Molecular imprinting technology for sensing foodborne pathogenic bacteria. Anal Bioanal Chem 2021; 413:4581-4598. [PMID: 33564924 DOI: 10.1007/s00216-020-03138-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/11/2020] [Accepted: 12/18/2020] [Indexed: 01/09/2023]
Abstract
Foodborne diseases caused by bacterial pathogens pose a widespread and growing threat to public health in the world. Rapid detection of pathogenic bacteria is of great importance to prevent foodborne diseases and ensure food safety. However, traditional detection methods are time-consuming, labour intensive and expensive. In recent years, many attempts have been made to develop alternative methods for bacterial detection. Biosensors integrated with molecular imprinted polymers (MIPs) and various transducer platforms are among the most promising candidates for the detection of pathogenic bacteria in a highly sensitive, selective and ultra-rapid manner. In this review, we summarize the most recent advances in molecular imprinting for bacterial detection, introduce the underlying recognition mechanisms and highlight the applications of MIP-based biosensors. In addition, the challenges and future perspectives are discussed with the aim of accelerating the development of MIP-based biosensors and extending their applications.
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Affiliation(s)
- Jingbin Zhang
- Department of Food Science and Agricultural Chemistry, Faculty of Agricultural and Environmental Sciences, McGill University, Sainte-Anne-de-Bellevue, Quebec, H9X 3V9, Canada
| | - Yixiang Wang
- Department of Food Science and Agricultural Chemistry, Faculty of Agricultural and Environmental Sciences, McGill University, Sainte-Anne-de-Bellevue, Quebec, H9X 3V9, Canada
| | - Xiaonan Lu
- Department of Food Science and Agricultural Chemistry, Faculty of Agricultural and Environmental Sciences, McGill University, Sainte-Anne-de-Bellevue, Quebec, H9X 3V9, Canada.
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Hui L, Chen J, Kafley P, Liu H. Capture and Kill: Selective Eradication of Target Bacteria by a Flexible Bacteria-Imprinted Chip. ACS Biomater Sci Eng 2021; 7:90-95. [PMID: 33338373 DOI: 10.1021/acsbiomaterials.0c01568] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This paper reports an antibacterial chip that can selectively capture bacteria and kill them using low-voltage DC electricity. We prepared a bacteria-imprinted, flexible PDMS chip that can separate target bacteria from suspensions with high selectivity. The chip contained integrated electrodes that can kill the captured bacteria within 10 min by applying a low DC voltage. The used chip could be easily regenerated by solution immersion. Meanwhile, the PDMS chip showed good biocompatibility and inhibited adhesion of human blood cells. Our work points to a new strategy to address pathogenic bacterial contamination and infection.
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Affiliation(s)
- Liwei Hui
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jun Chen
- Petersen Institute of NanoScience and Engineering, and Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Parmila Kafley
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Haitao Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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Matsui K, Tanabe S, Sun S, Nguyen D, Kinoshita T, Yamamoto Y, Shiigi H. Development of Metal Nanoparticle-immobilized Microplate for High-throughput and Highly Sensitive Fluorescence Analysis. ANAL SCI 2020; 36:1461-1465. [PMID: 32779577 DOI: 10.2116/analsci.20p225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Enzyme-linked immunosorbent assay (ELISA) is a widespread analytical biochemistry assay. In this work, a direct ELISA method using a metallic nanoparticle (NP)-immobilized 96-well plate was developed for high-throughput, highly sensitive fluorescence analysis. Immobilization of metallic NPs on a 96-well plate effectively amplified fluorescence signals of the assay. The silver (Ag) NP-immobilized plate showed the best fluorescence enhancement effect of all the metal-immobilized plates tested. We used the Ag NP-immobilized plate to detect biomolecules and bacteria and found that both the fluorescence intensity and the limit of detection (LOD) were strongly enhanced by more than 100 times compared with those of the unmodified 96-well plates. Quantitative and qualitative considerations for target bacteria regarding the impact of autofluorescence on detection were successfully obtained for several strains. Our results demonstrate the potential of applying Ag NPs for enhancing the efficiency of direct and indirect ELISA assays.
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Affiliation(s)
- Kyohei Matsui
- Department of Applied Chemistry, Osaka Prefecture University
| | - So Tanabe
- Department of Applied Chemistry, Osaka Prefecture University
| | - Shuyi Sun
- Department of Applied Chemistry, Osaka Prefecture University
| | - Dung Nguyen
- Department of Applied Chemistry, Osaka Prefecture University
| | | | - Yojiro Yamamoto
- Department of Applied Chemistry, Osaka Prefecture University.,GreenChem. Inc
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University
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12
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Sun S, Matsui K, Tanabe S, Nguyen D, Kinoshita T, Yamamoto Y, Shiigi H. Fluorescence Enhancement Effect by Metal Nanoparticles-immobilized Microplate. ANAL SCI 2020; 36:787-789. [PMID: 32595192 DOI: 10.2116/analsci.advpub_20c009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this reported work, we achieved high-throughput, highly sensitive fluorescent analysis using an enzyme-linked immunosorbent assay (ELISA) that employed a metallic nanoparticle (NP)-immobilized 96-well plate. The immobilization of metallic NPs on a 96-well plate effectively amplified fluorescent signals of the assay. The silver (Ag) NP-immobilized plate showed the best fluorescent enhancement effect of all plates immobilized by metal NPs. Our results demonstrate the potential of applying Ag NPs to enhance the efficiency of direct and indirect ELISA by the labeling of targets.
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Affiliation(s)
- Shuyi Sun
- Department of Applied Chemistry, Osaka Prefecture University
| | - Kyohei Matsui
- Department of Applied Chemistry, Osaka Prefecture University
| | - So Tanabe
- Department of Applied Chemistry, Osaka Prefecture University
| | - Dung Nguyen
- Department of Applied Chemistry, Osaka Prefecture University
| | | | - Yojiro Yamamoto
- Department of Applied Chemistry, Osaka Prefecture University.,GreenChem. Inc
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University
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Abstract
Microbial contaminations and infections are hazardous and pose crucial concerns for humans. They result in severe morbidity and mortality around the globe. Even though dish-culturing, polymerase chain reaction (PCR), an enzyme-linked immunosorbent assay (ELISA) exhibits accurate and reliable detection of bacteria but these methods are time-consuming, laborious, and expensive. This warrants early detection and quantification of bacteria for timely diagnosis and treatment. Bacteria imprinting ensures a solution for selective and early detection of bacteria by snagging them inside their imprinted cavities. This review provides an insight into MIPs based bacterial detection strategies, challenges, and future perspectives.
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Affiliation(s)
- Shabi Abbas Zaidi
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
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14
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Molecularly Imprinted Polymers for Cell Recognition. Trends Biotechnol 2019; 38:368-387. [PMID: 31677857 DOI: 10.1016/j.tibtech.2019.10.002] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/27/2019] [Accepted: 10/03/2019] [Indexed: 12/21/2022]
Abstract
Since their conception 50 years ago, molecularly imprinted polymers (MIPs) have seen extensive development both in terms of synthetic routes and applications. Cells are perhaps the most challenging target for molecular imprinting. Although early work was based almost entirely around microprinting methods, recent developments have shifted towards epitope imprinting to generate MIP nanoparticles (NPs). Simultaneously, the development of techniques such as solid phase MIP synthesis has solved many historic issues of MIP production. This review briefly describes various approaches used in cell imprinting with a focus on applications of the created materials in imaging, drug delivery, diagnostics, and tissue engineering.
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Saito M, Ishiki K, Nguyen DQ, Shiigi H. A Microbial Platform Based on Conducting Polymers for Evaluating Metabolic Activity. Anal Chem 2019; 91:12793-12798. [DOI: 10.1021/acs.analchem.9b02350] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Maki Saito
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Kengo Ishiki
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Dung Q. Nguyen
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
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16
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Nguyen DQ, Shan X, Saito M, Iwamoto K, Chen Z, Shiigi H. Evaluation of Surface Structure of Escherichia coli Using Polypyrrole Matrix. ANAL SCI 2019; 35:763-767. [PMID: 30905905 DOI: 10.2116/analsci.19p068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We propose a method to evaluate the surface structure of Escherichia coli focusing on the doping state of bacterial cells into polypyrrole (PPy) matrix. We found that the orientation of doping states of E. coli O rough was different from those of other serotypes of E. coli cells, which had O-antigen on their outer membrane. The results indicated that more than seventy percent of E. coli cells having O-antigen was horizontally doped into PPy matrix based on the chemical structure and the placement of O-antigen. On the other hand, the percentage for horizontal doping state of E. coli O rough cells was only approximately fifty percent. Moreover, the cells of each E. coli serotypes were specifically bound to their own shape-complementary cavities on the microspheres, but the binding affinity of E. coli O rough was a bit lower than that of other serotypes.
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Affiliation(s)
- Dung Q Nguyen
- Department of Applied Chemistry, Osaka Prefecture University
| | - Xueling Shan
- School of Petrochemical Engineering, Changzhou University
| | - Maki Saito
- Department of Applied Chemistry, Osaka Prefecture University
| | - Kota Iwamoto
- Department of Applied Chemistry, Osaka Prefecture University
| | - Zhidong Chen
- School of Petrochemical Engineering, Changzhou University
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University
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17
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Löffler S, Antypas H, Choong FX, Nilsson KPR, Richter-Dahlfors A. Conjugated Oligo- and Polymers for Bacterial Sensing. Front Chem 2019; 7:265. [PMID: 31058140 PMCID: PMC6482434 DOI: 10.3389/fchem.2019.00265] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 04/01/2019] [Indexed: 11/29/2022] Open
Abstract
Fast and accurate detection of bacteria and differentiation between pathogenic and commensal colonization are important keys in preventing the emergence and spread of bacterial resistance toward antibiotics. As bacteria undergo major lifestyle changes during colonization, bacterial sensing needs to be achieved on different levels. In this review, we describe how conjugated oligo- and polymers are used to detect bacterial colonization. We summarize how oligothiophene derivatives have been tailor-made for detection of biopolymers produced by a wide range of bacteria upon entering the biofilm lifestyle. We further describe how these findings are translated into diagnostic approaches for biofilm-related infections. Collectively, this provides an overview on how synthetic biorecognition elements can be used to produce fast and easy diagnostic tools and new methods for infection control.
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Affiliation(s)
- Susanne Löffler
- Department of Neuroscience, Swedish Medical Nanoscience Center, Karolinska Institutet, Stockholm, Sweden
| | - Haris Antypas
- Department of Neuroscience, Swedish Medical Nanoscience Center, Karolinska Institutet, Stockholm, Sweden
| | - Ferdinand X. Choong
- Department of Neuroscience, Swedish Medical Nanoscience Center, Karolinska Institutet, Stockholm, Sweden
| | | | - Agneta Richter-Dahlfors
- Department of Neuroscience, Swedish Medical Nanoscience Center, Karolinska Institutet, Stockholm, Sweden
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18
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Cao T, Wang Y, Zhao LL, Wang Y, Tao Y, Heyman JA, Weitz DA, Zhou YL, Zhang XX. A simple mix-and-read bacteria detection system based on a DNAzyme and a molecular beacon. Chem Commun (Camb) 2019; 55:7358-7361. [DOI: 10.1039/c9cc03746b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A simple improved mix-and-read method for the detection of bacteria is developed based on a DNAzyme and a molecular beacon.
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Affiliation(s)
- Ting Cao
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering
- College of Chemistry
- Peking University
- Beijing 100871
| | - Yongcheng Wang
- John A. Paulson School of Engineering and Applied Sciences and Department of Physics
- Harvard University
- Cambridge
- USA
- Wyss Institute for Biologically Inspired Engineering
| | - Ling-Li Zhao
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering
- College of Chemistry
- Peking University
- Beijing 100871
| | - Ye Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering
- College of Chemistry
- Peking University
- Beijing 100871
| | - Ye Tao
- John A. Paulson School of Engineering and Applied Sciences and Department of Physics
- Harvard University
- Cambridge
- USA
| | - John A. Heyman
- John A. Paulson School of Engineering and Applied Sciences and Department of Physics
- Harvard University
- Cambridge
- USA
| | - David A. Weitz
- John A. Paulson School of Engineering and Applied Sciences and Department of Physics
- Harvard University
- Cambridge
- USA
- Wyss Institute for Biologically Inspired Engineering
| | - Ying-Lin Zhou
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering
- College of Chemistry
- Peking University
- Beijing 100871
| | - Xin-Xiang Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering
- College of Chemistry
- Peking University
- Beijing 100871
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19
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Ishiki K, Nguyen DQ, Morishita A, Shiigi H, Nagaoka T. Electrochemical Detection of Viable Bacterial Cells Using a Tetrazolium Salt. Anal Chem 2018; 90:10903-10909. [DOI: 10.1021/acs.analchem.8b02404] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Kengo Ishiki
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Dung Q. Nguyen
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Aya Morishita
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Hiroshi Shiigi
- Department of Applied Chemistry, Osaka Prefecture University, 1-2 Gakuen, Naka, Sakai, Osaka 599-8570, Japan
| | - Tsutomu Nagaoka
- Organization for Research Initiatives, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
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