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Ganguly S, Sengupta J. Graphene-based nanotechnology in the Internet of Things: a mini review. DISCOVER NANO 2024; 19:110. [PMID: 38954113 PMCID: PMC11219675 DOI: 10.1186/s11671-024-04054-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Accepted: 06/17/2024] [Indexed: 07/04/2024]
Abstract
Graphene, a 2D nanomaterial, has garnered significant attention in recent years due to its exceptional properties, offering immense potential for revolutionizing various technological applications. In the context of the Internet of Things (IoT), which demands seamless connectivity and efficient data processing, graphene's unique attributes have positioned it as a promising candidate to prevail over challenges and optimize IoT systems. This review paper aims to provide a brief sketch of the diverse applications of graphene in IoT, highlighting its contributions to sensors, communication systems, and energy storage devices. Additionally, it discusses potential challenges and prospects for the integration of graphene in the rapidly evolving IoT landscape.
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Affiliation(s)
- Sharmi Ganguly
- Department of Electronics & Communication Engineering, Meghnad Saha Institute of Technology, Kolkata, 700150, India
| | - Joydip Sengupta
- Department of Electronic Science, Jogesh Chandra Chaudhuri College, Kolkata, 700033, India.
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2
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Fernández Blanco A, Moreno Y, García-Hernández J, Hernández M. A Photonic Immunosensor Detection Method for Viable and Non-Viable E. coli in Water Samples. Microorganisms 2024; 12:1328. [PMID: 39065096 PMCID: PMC11278787 DOI: 10.3390/microorganisms12071328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 06/17/2024] [Accepted: 06/21/2024] [Indexed: 07/28/2024] Open
Abstract
Detection and enumeration of coliform bacteria using traditional methods and current molecular techniques against E. coli usually involve long processes with less sensitivity and specificity to distinguish between viable and non-viable bacteria for microbiological water analysis. This approach involves developing and validating an immunosensor comprising ring resonators functionalized with specific antibodies surrounded by a network of microchannels as an alternative method for detecting and indirectly enumerating Escherichia coli in samples of water for consumption. Different ELISA assays were conducted to characterize monoclonal and polyclonal antibodies selected as detection probes for specific B-galactosidase enzymes and membrane LPS antigens of E. coli. An immobilization control study was performed on silicon nitride surfaces used in the immunosensor, immobilized with the selected antibodies from the ELISA assays. The specificity of this method was confirmed by detecting as few as 10 CFU/mL of E. coli from viable and non-viable target bacteria after applying various disinfection methods to water samples intended for human consumption. The 100% detection rate and a 100 CFU/mL Limit of Quantification of the proposed method were validated through a comprehensive assessment of the immunosensor-coupled microfluidic system, involving at least 50 replicates with a concentration range of 10 to 106 CFU/mL of the target bacteria and 50 real samples contaminated with and without disinfection treatment. The correlation coefficient of around one calculated for each calibration curve obtained from the results demonstrated sensitive and rapid detection capabilities suitable for application in water resources intended for human consumption within the food industry. The biosensor was shown to provide results in less than 4 h, allowing for rapid identification of microbial contamination crucial for ensuring water monitoring related to food safety or environmental diagnosis and allowing for timely interventions to mitigate contamination risks. Indeed, the achieved setup facilitates the in situ execution of laboratory processes, allowing for the detection of both viable and non-viable bacteria, and it implies future developments of simultaneous detection of pathogens in the same contaminated sample.
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Affiliation(s)
| | - Yolanda Moreno
- Institute of Water and Environmental Engineering, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Jorge García-Hernández
- Advanced Center for Food Microbiology, Biotechnology Department, Universitat Politècnica de València, 46022 Valencia, Spain; (J.G.-H.); (M.H.)
| | - Manuel Hernández
- Advanced Center for Food Microbiology, Biotechnology Department, Universitat Politècnica de València, 46022 Valencia, Spain; (J.G.-H.); (M.H.)
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3
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Sharma K, Sharma M. Optical biosensors for environmental monitoring: Recent advances and future perspectives in bacterial detection. ENVIRONMENTAL RESEARCH 2023; 236:116826. [PMID: 37543133 DOI: 10.1016/j.envres.2023.116826] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/24/2023] [Accepted: 08/03/2023] [Indexed: 08/07/2023]
Abstract
The environmental contamination due to bacterial proliferation vs their identification is the major deciding factor in the spread of diseases leading to pandemics. The advent of drug-resistant pathogenic contaminants in our environment has further added to the load of complications associated with their diagnosis and treatment. Obstructing the spread of such infections, prioritizes the expansion of sensor-based diagnostics, effectuating, a sturdy detection of disease-causing microbes, contaminating our surroundings in shortest possible time, with minimal expenditure. Among many sensors known, optical biosensors promote the recognition of pathogens befouling the environment through a comparatively intuitive, brisk, portable, multitudinous, and thrifty approach. This article reviews the recent progresses in optical biosensor-based systems for effective environmental monitoring. The technical and methodological perspectives of fundamental optical-sensing platforms are reviewed, combined with the pros and cons of every procedure. Eventually, the obstacles lying in the path of development of an effective optical biosensor device for bio-monitoring and its future perspectives are highlighted in the present work.
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Affiliation(s)
- Kajal Sharma
- Molecular Genetics of Aging, Dr. B.R. Ambedkar Center for Biomedical Research (ACBR), University of Delhi (DU), India.
| | - Meenakshi Sharma
- Molecular Genetics of Aging, Dr. B.R. Ambedkar Center for Biomedical Research (ACBR), University of Delhi (DU), India.
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4
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Recent advances in optical biosensors for specific detection of E. coli bacteria in food and water. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.108822] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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5
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Mi F, Guan M, Hu C, Peng F, Sun S, Wang X. Application of lectin-based biosensor technology in the detection of foodborne pathogenic bacteria: a review. Analyst 2021; 146:429-443. [DOI: 10.1039/d0an01459a] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Foodborne diseases caused by pathogenic bacteria pose a serious threat to human health.
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Affiliation(s)
- Fang Mi
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
- Xinjiang bingtuan Xingxin Vocational and Technical College
| | - Ming Guan
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Cunming Hu
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Fei Peng
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Shijiao Sun
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Xiaomei Wang
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
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6
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Gandhi D, Li P, Rampini S, Parent C, Lee GU. Optical detection of the magnetophoretic transport of superparamagnetic beads on a micromagnetic array. Sci Rep 2020; 10:12876. [PMID: 32733006 PMCID: PMC7392889 DOI: 10.1038/s41598-020-69757-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 07/13/2020] [Indexed: 11/09/2022] Open
Abstract
Micromagnetic arrays (MMAs) have proven to be powerful tools for controlling the transport and separation of bioanalytes, i.e., they allow bioanalyte-superparamagnetic (SPM) bead complexes of specific size and magnetization to be moved in a synchronized manner that is precisely controlled with the orientation of an external magnetic field. This article presents a laser-photodetector system for the simple detection of individual SPM beads moving on a specific region of an MMA. This system detects the SPM beads through the change in intensity of reflective light as they move from the highly reflective micromagnetics to the supporting substrate. We demonstrate that this opti-MMA system allowed the size, number, and magnetic and optical properties of the SPM beads to be rapidly determined for regions > 49 µm2 in size. The response of the opti-MMA system was characterized in several optical configurations to develop a theoretical description of its sensitivity and dynamic range. The speed, low-cost, and sensitivity of this system promises to allow MMAs to be readily applied in in vitro diagnostics and biosensing.
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Affiliation(s)
- Dhruv Gandhi
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Peng Li
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Stefano Rampini
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Charlotte Parent
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Gil U Lee
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
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7
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Sundaram E, Subramanian V, Velayutham K, Gomathinayagam R, Vasantha VS. Michael Addition Based Chemodosimeter for Serum Creatinine Detection Using ( E)-3-(Pyren-2-yl)-1-(3,4,5-trimethoxyphenyl)prop-2-en-1-one Chalcone. ACS Sens 2018; 3:763-771. [PMID: 29498258 DOI: 10.1021/acssensors.7b00822] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
First, a simple and highly emissive fluorescent chalcone ( E)-3-(pyren-2-yl)-1-(3,4,5-trimethoxyphenyl)prop-2-en-1-one (PTP) was synthesized via simple shaking along with an excellent quantum yield of 0.85, and proved as a stable, highly sensitive, and selective biosensor for creatinine. Owing to its unique photophysical interaction with creatinine through Michael adduct formation, PTP was utilized as a Chemodosimeter for the selective recognition of creatinine in blood serum. Under optimized conditions, a broad range of creatinine detection was achieved from 0.00000113 mg/dL to 15.8 mg/dL along with an excellent limit of detection of 0.00000065 mg/dL (0.058 nM). This biosensor is highly reproducible even for different concentration levels of creatinine. It is the very first creatinine biosensor possessing a wider linear range for clinical applications for creatinine. To ensure its clinical application, blood serum samples of people of different age groups were collected from Alpha Hospital and analyzed for creatinine by using our chemodosimeter method and compared with data obtained using a commercial method in the Alpha hospital. Our data show very good agreement with clinical data. Because clinical protocol involves trienzymes and tedious sample preparation, no doubt, our chemodosimeter will be a cheap and sensitive option compared to the existing clinical methods.
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Affiliation(s)
- Ellairaja Sundaram
- Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai - 625 021, Tamilnadu, India
| | - Venkatesan Subramanian
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai - 600 020, Tamilnadu, India
| | | | | | - Vairathevar Sivasamy Vasantha
- Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai - 625 021, Tamilnadu, India
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8
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Thakur B, Zhou G, Chang J, Pu H, Jin B, Sui X, Yuan X, Yang CH, Magruder M, Chen J. Rapid detection of single E. coli bacteria using a graphene-based field-effect transistor device. Biosens Bioelectron 2018; 110:16-22. [PMID: 29579645 DOI: 10.1016/j.bios.2018.03.014] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Revised: 02/16/2018] [Accepted: 03/06/2018] [Indexed: 12/31/2022]
Abstract
Contamination of surface and drinking water due to the presence of Escherichia coli bacteria is a major cause of water-borne disease outbreak. To address unmet challenges for practical pathogen detection in contaminated samples, we report fabrication of thermally reduced graphene oxide-based field-effect transistor (rGO FET) passivated with an ultrathin layer of Al2O3 for real-time detection of E. coli bacteria. The sensor could detect a single E. coli cell within 50 s in a 1 µL sample volume. The ultrathin layer of Al2O3 acted as a barrier between rGO and potential interferents present in the sample. E. coli specific antibodies anchored on gold nanoparticles acted as probes for selective capture of E. coli. The high density of negative charge on the surface of E. coli cells strongly modulates the concentration of majority charge carriers in the rGO monolayer, thereby allowing real-time monitoring of E. coli concentration in a given sample. With a low detection limit of single cell, the FET sensor had a linear range of 1-100 CFU in 1 µL volume of sample (i.e., 103 to 105 CFU/ mL). The biosensor with good selectivity and rapid detection was further successfully demonstrated for E. coli sensing in river water. The rGO-based FET sensor provides a low cost and label-free approach, and can be mass produced for detection of a broad spectrum of pathogens in water or other liquid media.
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Affiliation(s)
- Bhawana Thakur
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, WI 53211, United States
| | - Guihua Zhou
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, WI 53211, United States
| | - Jingbo Chang
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, WI 53211, United States
| | - Haihui Pu
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, WI 53211, United States
| | - Bing Jin
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, WI 53211, United States
| | - Xiaoyu Sui
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, WI 53211, United States
| | - Xiaochen Yuan
- Department of Biological Sciences, University of Wisconsin-Milwaukee, WI 53211, United States
| | - Ching-Hong Yang
- Department of Biological Sciences, University of Wisconsin-Milwaukee, WI 53211, United States
| | - Matthew Magruder
- Milwaukee Metropolitan Sewerage District, Milwaukee, WI 53211, United States
| | - Junhong Chen
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, WI 53211, United States.
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Umesha S, Manukumar HM. Advanced molecular diagnostic techniques for detection of food-borne pathogens: Current applications and future challenges. Crit Rev Food Sci Nutr 2017; 58:84-104. [PMID: 26745757 DOI: 10.1080/10408398.2015.1126701] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The elimination of disease-causing microbes from the food supply is a primary goal and this review deals with the overall techniques available for detection of food-borne pathogens. Now-a-days conventional methods are replaced by advanced methods like Biosensors, Nucleic Acid-based Tests (NAT), and different PCR-based techniques used in molecular biology to identify specific pathogens. Bacillus cereus, Staphylococcus aureus, Proteus vulgaris, Escherichia coli, Campylobacter, Listeria monocytogenes, Salmonella spp., Aspergillus spp., Fusarium spp., Penicillium spp., and pathogens are detected in contaminated food items that cause always diseases in human in any one or the other way. Identification of food-borne pathogens in a short period of time is still a challenge to the scientific field in general and food technology in particular. The low level of food contamination by major pathogens requires specific sensitive detection platforms and the present area of hot research looking forward to new nanomolecular techniques for nanomaterials, make them suitable for the development of assays with high sensitivity, response time, and portability. With the sound of these, we attempt to highlight a comprehensive overview about food-borne pathogen detection by rapid, sensitive, accurate, and cost affordable in situ analytical methods from conventional methods to recent molecular approaches for advanced food and microbiology research.
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Affiliation(s)
- S Umesha
- a Department of Studies in Biotechnology , University of Mysore, Manasagangotri , Mysore , Karnataka , India
| | - H M Manukumar
- a Department of Studies in Biotechnology , University of Mysore, Manasagangotri , Mysore , Karnataka , India
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10
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Li X, Soler M, Özdemir CI, Belushkin A, Yesilköy F, Altug H. Plasmonic nanohole array biosensor for label-free and real-time analysis of live cell secretion. LAB ON A CHIP 2017; 17:2208-2217. [PMID: 28585972 DOI: 10.1039/c7lc00277g] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Cell secretion dynamics plays a central role in physiological and disease processes. Due to its various temporal profiles, it is essential to implement a precise detection scheme for continuous monitoring of secretion in real time. The current fluorescent and colorimetric approaches hinder such applications due to their multiple time-consuming steps, molecular labeling, and especially the 'snapshot' endpoint readouts. Here, we develop a nanoplasmonic biosensor for real-time monitoring of live cell cytokine secretion in a label-free configuration. Our nanoplasmonic biosensor is composed of gold nanohole arrays supporting extraordinary optical transmission (EOT), which enables sensitive and high-throughput analysis of biomolecules. The nanobiosensor is integrated with an adjustable microfluidic cell module for the analysis of live cells under well-controlled culture conditions. We achieved an outstanding sensitivity for the detection of vascular endothelial growth factor (VEGF) directly in complex cell media. Significantly, the secretion dynamics from live cancer cells were monitored and quantified for 10 hours while preserving good cell viability. This novel approach of probing cytokine secretion activity is compatible with conventional inverted microscopes found in a common biology laboratory. With its simple optical set-up and label-free detection configuration, we anticipate our nanoplasmonic biosensor to be a powerful tool as a lab-on-chip device to analyze cellular activities for fundamental cell research and biotechnologies.
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Affiliation(s)
- Xiaokang Li
- Institute of Bioengineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland.
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11
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Ellairaja S, Krithiga N, Ponmariappan S, Vasantha VS. Novel Pyrimidine Tagged Silver Nanoparticle Based Fluorescent Immunoassay for the Detection of Pseudomonas aeruginosa. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:1802-1812. [PMID: 28161944 DOI: 10.1021/acs.jafc.6b04790] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A simple pyrimidine-based fluorescent probe (R)-4-(anthracen-9-yl)-6- (naphthalen-1-yl)-1,6-dihydropyrimidine-2-amine (ANDPA) was synthesized through the greener one pot reaction and characterized by IR, NMR, and ESI-Mass. Glucose stabilized silver nanoparticles (Glu-AgNPs) were also synthesized and characterized using UV, IR, XRD, SEM, and TEM. When ANDPA was tagged with Glu-AgNPs, the fluorescent intensity of ANDPA decreased drastically. When the monoclonal antibody (Ab) [immunoglobulin G (IgG)] of Pseudomonas aeruginosa (PA) was attached with ANDPA/Glu-AgNPs, the original intensity of the probe was recovered with minimal enhancement at 446 nm. On further attachment of PA with ANDPA/Glu-AgNPs/PA, the fluorescence intensity of the probe was enhanced obviously at 446 nm with red shift. This phenomenon was further supported by SEM and TEM. The linear range of detection is from 8 to 10-1 CFU/mL, and LOD is 1.5 CFU/mL. The immunosensor was successfully demonstrated to detect Pseudomonas aeruginosa in water, soil, and food products like milk, sugar cane, and orange juices.
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Affiliation(s)
- Sundaram Ellairaja
- Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University , Madurai-625 021, Tamilnadu, India
| | - Narayanaswamy Krithiga
- Department of Plant Biotechnology, School of Biotechnology, Madurai Kamaraj University , Madurai-625 021, Tamilnadu, India
| | - Sarkaraisamy Ponmariappan
- Biotechnology Division, Defence Research Development & Establishment , Jhansi Road, Gwalior 474002, Madhya Pradesh, India
| | - Vairathevar Sivasamy Vasantha
- Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University , Madurai-625 021, Tamilnadu, India
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12
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Ellairaja S, Shenbagavalli K, Vasantha VS. Ultrasensitive Fluorescent Biosensor for Creatinine Determination in Human Biofluids Based on Water Soluble Rhodamine B Dye-Au3+ions Conjugate. ChemistrySelect 2017. [DOI: 10.1002/slct.201601110] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- S. Ellairaja
- Department of Natural Products Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai - 625 021 Tamilnadu India
| | - K. Shenbagavalli
- Department of Natural Products Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai - 625 021 Tamilnadu India
| | - V. S. Vasantha
- Department of Natural Products Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai - 625 021 Tamilnadu India
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13
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Maldonado J, González-Guerrero AB, Domínguez C, Lechuga LM. Label-free bimodal waveguide immunosensor for rapid diagnosis of bacterial infections in cirrhotic patients. Biosens Bioelectron 2016; 85:310-316. [PMID: 27183281 DOI: 10.1016/j.bios.2016.04.095] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 04/27/2016] [Accepted: 04/29/2016] [Indexed: 11/26/2022]
Abstract
Spontaneous bacterial peritonitis is an acute bacterial infection of ascitic fluid; it has a high incidence in cirrhotic patients and it is associated with high mortality. In such a situation, early diagnosis and treatment is crucial for the survival of the patient. However, bacterial analysis in ascitic fluid is currently based on culture methods, which are time-consuming and laborious. We report here the application of a photonic interferometer biosensor based on a bimodal waveguide (BiMW) for the rapid and label-free detection of bacteria directly in ascitic fluid. The device consists of a straight waveguide in which two modes of the same polarization interfere while interacting with the external medium through their evanescent fields. A bimolecular event occurring on the sensor area of the device (e.g. capturing bacteria) will differently affect each light mode, inducing a variation in the phase of the light exiting at the output of the waveguide. In this work, we demonstrate the quantitative detection of Bacillus cereus in buffer medium and Escherichia coli in undiluted ascitic fluid from cirrhotic patients. In the case of Bacillus cereus detection, the device was able to specifically detect bacteria at relevant concentrations in 12.5min and in the case of Escherichia coli detection, the analysis time was 25min. Extrapolation of the data demonstrated that the detection limits of the biosensor could reach few bacteria per milliliter. Based on the results obtained, we consider that the BiMW biosensor is positioned as a promising new clinical tool for user-friendly, cost-effective and real-time microbiological analysis.
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Affiliation(s)
- Jesús Maldonado
- Nanobiosensors and Bioanalytical Applications Group. Catalan Institute of Nanoscience and Nanotechnology (ICN2). CSIC and CIBER-BBN, Campus UAB, Ed-ICN2, 08193 Barcelona, Bellaterra, Spain
| | - Ana Belén González-Guerrero
- Nanobiosensors and Bioanalytical Applications Group. Catalan Institute of Nanoscience and Nanotechnology (ICN2). CSIC and CIBER-BBN, Campus UAB, Ed-ICN2, 08193 Barcelona, Bellaterra, Spain
| | - Carlos Domínguez
- Microelectronic Institute of Barcelona (IMB-CNM), CSIC, Campus UAB, 08193 Barcelona, Bellaterra, Spain
| | - Laura M Lechuga
- Nanobiosensors and Bioanalytical Applications Group. Catalan Institute of Nanoscience and Nanotechnology (ICN2). CSIC and CIBER-BBN, Campus UAB, Ed-ICN2, 08193 Barcelona, Bellaterra, Spain.
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14
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Vashist SK, Lam E, Hrapovic S, Male KB, Luong JHT. Immobilization of Antibodies and Enzymes on 3-Aminopropyltriethoxysilane-Functionalized Bioanalytical Platforms for Biosensors and Diagnostics. Chem Rev 2014; 114:11083-130. [DOI: 10.1021/cr5000943] [Citation(s) in RCA: 212] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sandeep Kumar Vashist
- HSG-IMIT - Institut für Mikro- und Informationstechnik, Georges-Koehler-Allee 103, 79110 Freiburg, Germany
- Laboratory for MEMS Applications, Department of Microsystems Engineering - IMTEK, University of Freiburg, Georges-Koehler-Allee 103, 79110 Freiburg, Germany
| | - Edmond Lam
- National Research Council Canada, Montreal, Quebec H4P 2R2, Canada
| | | | - Keith B. Male
- National Research Council Canada, Montreal, Quebec H4P 2R2, Canada
| | - John H. T. Luong
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), Department of Chemistry and Analytical, Biological Chemistry Research Facility (ABCRF), University College Cork, Cork, Ireland
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15
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Dual labeled Ag@SiO₂ core-shell nanoparticle based optical immunosensor for sensitive detection of E. coli. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:337-42. [PMID: 25491837 DOI: 10.1016/j.msec.2014.09.028] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 04/28/2014] [Accepted: 09/14/2014] [Indexed: 11/23/2022]
Abstract
An optical nanobiosensor is presented using a fluorescent dye and anti-E. coli McAb anchored Ag@Silica core shell nanoparticles, for rapid and sensitive Escherichia coli detection in environmental samples. The synthesized dual labeled core shell (DLCS) nanoparticle shows intense fluorescence at 620 nm in solution, having a narrow emission with full width at half maxima (FWHM) of 10 nm, as a prerequisite to develop a sensitive detection platform for various biosensing applications. The specific E. coli was captured using an anti-E. coli antibody functionalized quartz glass, followed by a treatment with DLCS, where the photoluminescence spectroscopy was used to detect the target pathogen. The fabrication of the quartz glass based optical-immunosensor was monitored, and the results show changes in the photoluminescent patterns, which substantiate that varied species were immobilized on the surface of the antibody modified quartz glass. Consequently, the optical immunosensor demonstrated specificity and improved sensitivity, as compared to the customary methods, and was able to detect as low as 5CFU/mL. The developed DLCS based optical immunosensor was evaluated with environmental water samples, which showed acceptable precision, reproducibility and stability, and could be readily applied to the routine monitoring of pathogenic microorganisms in the environmental samples, and most importantly, demonstrate the potential of a prototype development of a simple and inexpensive diagnostic technique.
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16
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Novel antibody/gold nanoparticle/magnetic nanoparticle nanocomposites for immunomagnetic separation and rapid colorimetric detection of Staphylococcus aureus in milk. Biosens Bioelectron 2013; 43:432-9. [DOI: 10.1016/j.bios.2012.12.052] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Revised: 12/05/2012] [Accepted: 12/23/2012] [Indexed: 11/23/2022]
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17
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Chen L, Razavi FS, Mumin A, Guo X, Sham TK, Zhang J. Multifunctional nanoparticles for rapid bacterial capture, detection, and decontamination. RSC Adv 2013. [DOI: 10.1039/c2ra22286h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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18
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Zhou Y, Chiu CW, Liang H. Interfacial structures and properties of organic materials for biosensors: an overview. SENSORS 2012. [PMID: 23202199 PMCID: PMC3522952 DOI: 10.3390/s121115036] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The capabilities of biosensors for bio-environmental monitoring have profound influences on medical, pharmaceutical, and environmental applications. This paper provides an overview on the background and applications of the state-of-the-art biosensors. Different types of biosensors are summarized and sensing mechanisms are discussed. A review of organic materials used in biosensors is given. Specifically, this review focuses on self-assembled monolayers (SAM) due to their high sensitivity and high versatility. The kinetics, chemistry, and the immobilization strategies of biomolecules are discussed. Other representative organic materials, such as graphene, carbon nanotubes (CNTs), and conductive polymers are also introduced in this review.
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Affiliation(s)
- Yan Zhou
- Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA.
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19
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Mura S, Greppi G, Marongiu ML, Roggero PP, Ravindranath SP, Mauer LJ, Schibeci N, Perria F, Piccinini M, Innocenzi P, Irudayaraj J. FTIR nanobiosensors for Escherichia coli detection. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2012; 3:485-92. [PMID: 23019542 PMCID: PMC3458592 DOI: 10.3762/bjnano.3.55] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Accepted: 06/13/2012] [Indexed: 05/14/2023]
Abstract
Infections due to enterohaemorrhagic E. coli (Escherichia coli) have a low incidence but can have severe and sometimes fatal health consequences, and thus represent some of the most serious diseases due to the contamination of water and food. New, fast and simple devices that monitor these pathogens are necessary to improve the safety of our food supply chain. In this work we report on mesoporous titania thin-film substrates as sensors to detect E. coli O157:H7. Titania films treated with APTES ((3-aminopropyl)triethoxysilane) and GA (glutaraldehyde) were functionalized with specific antibodies and the absorption properties monitored. The film-based biosensors showed a detection limit for E. coli of 1 × 10(2) CFU/mL, constituting a simple and selective method for the effective screening of water samples.
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Affiliation(s)
- Stefania Mura
- Nucleo Ricerca Desertificazione, Università degli Studi di Sassari, Viale Italia 57, 07100 Sassari, Italy
- Department of Agricultural and Biological Engineering and Bindley Bioscience Center, Purdue University, 225 S. University Street, West Lafayette, 47907, Indiana
- Lea Nanotech s.r.l. S.P. 55 Porto Conte/Capo Caccia, km 8.400 località Tramariglio, 07041 Alghero (SS), Italy
| | - Gianfranco Greppi
- Nucleo Ricerca Desertificazione, Università degli Studi di Sassari, Viale Italia 57, 07100 Sassari, Italy
- Dipartimento di scienze zootecniche, Università degli Studi di Sassari, Via Enrico De Nicola 9, 07100 Sassari, Italy
| | - Maria Laura Marongiu
- Dipartimento di scienze zootecniche, Università degli Studi di Sassari, Via Enrico De Nicola 9, 07100 Sassari, Italy
| | - Pier Paolo Roggero
- Nucleo Ricerca Desertificazione, Università degli Studi di Sassari, Viale Italia 57, 07100 Sassari, Italy
| | - Sandeep P Ravindranath
- Department of Agricultural and Biological Engineering and Bindley Bioscience Center, Purdue University, 225 S. University Street, West Lafayette, 47907, Indiana
| | - Lisa J Mauer
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, 47907, Indiana
| | - Nicoletta Schibeci
- Lea Nanotech s.r.l. S.P. 55 Porto Conte/Capo Caccia, km 8.400 località Tramariglio, 07041 Alghero (SS), Italy
| | - Francesco Perria
- Biodiversity s.r.l. S.P. 55 Porto Conte/Capo Caccia, km 8.400 località Tramariglio, 07041 Alghero (SS), Italy
| | - Massimo Piccinini
- Porto conte ricerche, SP 55 Porto Conte/Capo Caccia, km 8.400 località Tramariglio, 07041 Alghero (SS), Italy
| | - Plinio Innocenzi
- Materials Science and Nanotechnology Laboratory, D.A.P., CR-INSTM, Università di Sassari, Palazzo Pou Salit, Piazza Duomo 6, 07041 Alghero (SS), Italy
| | - Joseph Irudayaraj
- Department of Agricultural and Biological Engineering and Bindley Bioscience Center, Purdue University, 225 S. University Street, West Lafayette, 47907, Indiana
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20
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Yang H, Wang Y, Qi H, Gao Q, Zhang C. Electrogenerated chemiluminescence biosensor incorporating ruthenium complex-labelled Concanavalin A as a probe for the detection of Escherichia coli. Biosens Bioelectron 2012; 35:376-381. [PMID: 22521414 DOI: 10.1016/j.bios.2012.03.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 03/12/2012] [Indexed: 01/13/2023]
Abstract
A novel electrogenerated chemiluminescence (ECL) biosensor for highly sensitive detection of Escherichia coli (E. coli) was first developed by employing Concanavalin A (Con A) as a biological recognition element and bis(2,2'-bipyridine)-4'-methyl-4-carboxybipyridine ruthenium (II) (Ru1) complex as the detector. The ECL biosensor was fabricated by adsorbing carboxyl-functionalised single-wall carbon nanotubes (SWNTs) onto a paraffin-impregnated graphite electrode and further covalently coupling the Ru1-Con A probe onto the surface of the SWNT-modified electrode. Upon the binding of E. coli O157:H7 (as a model target), the biosensor showed a decreased ECL intensity in the presence of tri-n-propylamine (TPrA), which was in logarithmically direct proportion to the concentration of E. coli over a range from 5.0 × 10(2) to 5.0 × 10(5)cells/mL. The detection limit of this sensor was 127 cells/mL. Additionally, the ECL biosensor also showed satisfactory selectivity in discriminating gram-negative E. coli from gram-positive bacteria. The strategy developed in this study may be a promising approach and could be extended to the design of ECL biosensors for highly sensitive and rapid detection of other desired bacteria.
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Affiliation(s)
- Haiying Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China; Department of Chemistry, Yuncheng University, Yuncheng 044300, PR China
| | - Yaqin Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China
| | - Honglan Qi
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China
| | - Qiang Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China
| | - Chengxiao Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
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Chowdhury MH, Chakraborty S, Lakowicz JR, Ray K. Feasibility of Using Bimetallic Plasmonic Nanostructures to Enhance the Intrinsic Emission of Biomolecules. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2011; 115:16879-16891. [PMID: 21984954 PMCID: PMC3185356 DOI: 10.1021/jp205108s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Detection of the intrinsic fluorescence from proteins is important in bio-assays because it can potentially eliminate the labeling of external fluorophores to proteins. This is advantageous because using external fluorescent labels to tag biomolecules requires chemical modification and additional incubation and washing steps which can potentially perturb the native functionality of the biomolecules. Hence the external labeling steps add expense and complexity to bio-assays. In this paper, we investigate for the first time the feasibility of using bimetallic nanostructures made of silver (Ag) and aluminum (Al) to implement the metal enhanced fluorescence (MEF) phenomenon for enhancing the intrinsic emission of biomolecules in the ultra-violet (UV) spectral region. Fluorescence intensities and lifetimes of a tryptophan analogue N-acetyl-L-tryptophanamide (NATA) and a tyrosine analogue N-acetyl-L-tyrosinamide (NATA-tyr) were measured. Increase in fluorescence intensities of upto 10-fold and concurrent decrease in lifetimes for the amino acids were recorded in the presence of the bimetallic nanostructures when compared to quartz controls. We performed a model protein assay involving biotinylated bovine serum albumin (bt-BSA) and streptavidin on the bimetallic nanostructured substrate to investigate the distance dependent effects on the extent of MEF from the bimetallic nanostructures and found a maximum enhancement of over 15-fold for two layers of bt-BSA and streptavidin. We also used finite difference time domain (FDTD) calculations to explore how bimetallic nanostructures interact with plane waves and excited state fluorophores in the UV region and demonstrate that the bimetallic substrates are an effective platform for enhancing the intrinsic emission of proteins and other biomolecules.
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Affiliation(s)
| | | | | | - Krishanu Ray
- Corresponding author: , Phone: 1-410-706-7500; Fax: 1-410-706-8408
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22
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Bharadwaj R, Sai V, Thakare K, Dhawangale A, Kundu T, Titus S, Verma PK, Mukherji S. Evanescent wave absorbance based fiber optic biosensor for label-free detection of E. coli at 280nm wavelength. Biosens Bioelectron 2011; 26:3367-70. [DOI: 10.1016/j.bios.2010.12.014] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Revised: 11/16/2010] [Accepted: 12/08/2010] [Indexed: 11/26/2022]
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23
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Electrochemical preparation of junction between a molecule and solid surface through a metal coordinative peptidic tag. Colloids Surf B Biointerfaces 2010; 79:83-7. [DOI: 10.1016/j.colsurfb.2010.03.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2009] [Revised: 03/16/2010] [Accepted: 03/24/2010] [Indexed: 11/17/2022]
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24
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An overview of foodborne pathogen detection: In the perspective of biosensors. Biotechnol Adv 2010; 28:232-54. [DOI: 10.1016/j.biotechadv.2009.12.004] [Citation(s) in RCA: 805] [Impact Index Per Article: 57.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Revised: 12/03/2009] [Accepted: 12/04/2009] [Indexed: 12/12/2022]
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25
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Sensing bacteria but treating them well: Determination of optimal incubation and storage conditions. Anal Biochem 2008; 383:68-75. [DOI: 10.1016/j.ab.2008.08.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2008] [Revised: 08/06/2008] [Accepted: 08/06/2008] [Indexed: 11/17/2022]
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26
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Szmacinski H, Ray K, Lakowicz JR. Metal-enhanced fluorescence of tryptophan residues in proteins: application toward label-free bioassays. Anal Biochem 2008; 385:358-64. [PMID: 19073133 DOI: 10.1016/j.ab.2008.11.025] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2008] [Revised: 11/10/2008] [Accepted: 11/16/2008] [Indexed: 12/01/2022]
Abstract
The detection of submonolayers of proteins based on native fluorescence is a potentially valuable approach for label-free detection. We have examined the possibility of using silver nanostructures to increase the emission of tryptophan residues in proteins. Fluorescence spectra, intensities, and lifetimes of multilayers and submonolayers of proteins deposited on the surfaces of silver island films were measured. Increased fluorescence intensities from two- to three-fold and similar decreases in lifetimes were observed in the presence of the silver nanoparticles compared with the proteins on the surface of the bare quartz. The observed spectral effects of silver nanoparticles on tryptophan fluorescence indicates the possibility for the design of analytical tools for the detection of proteins without traditional labeling by extrinsic fluorophores.
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Affiliation(s)
- Henryk Szmacinski
- Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland Baltimore, Baltimore, MD 21201, USA.
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27
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He F, Shen Q, Jiang H, Zhou J, Cheng J, Guo D, Li Q, Wang X, Fu D, Chen B. Rapid identification and high sensitive detection of cancer cells on the gold nanoparticle interface by combined contact angle and electrochemical measurements. Talanta 2008; 77:1009-14. [PMID: 19064083 DOI: 10.1016/j.talanta.2008.07.063] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2008] [Revised: 07/24/2008] [Accepted: 07/30/2008] [Indexed: 10/21/2022]
Abstract
In this study, we have proposed a novel strategy for the rapid identification and high sensitive detection of different kinds of cancer cells by means of electrochemical and contact angle measurements. A simple, unlabeled method based on the functionalized Au nanoparticles (GNPs) modified interface has been utilized to distinguish the different cancer cells, including lung cancer cells, liver cancer cells, drug sensitive leukemia K562/B.W cells and drug resistant leukemia K562/ADM cells. The relevant results indicate that under optimal conditions, this method can provide the quantitative determination of cancer cells, with a detection limit of approximately 10(3)cells mL(-1). Our observations demonstrate that the difference in the hydrophilic properties for target cellular surfaces and in the uptake efficiency of the anticancer drug daunorubicin for different cancer cells could be readily chosen as the elements of cancer identification and sensitive detection. This raises the possibility to advance the promising clinic diagnosis and monitoring of tumors with the aim of successful chemotherapy of human cancers.
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Affiliation(s)
- Fang He
- State Key Laboratory of Bioelectronics, Chien-Shiung Wu Laboratory, School of Biological Science and Medical Engineering, Southeast University, Nanjing, China
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28
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Liu ZD, Chen SF, Huang CZ, Zhen SJ, Liao QG. Light scattering sensing detection of pathogens based on the molecular recognition of immunoglobulin with cell wall-associated protein A. Anal Chim Acta 2007; 599:279-86. [PMID: 17870291 DOI: 10.1016/j.aca.2007.07.075] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2007] [Revised: 07/25/2007] [Accepted: 07/27/2007] [Indexed: 10/23/2022]
Abstract
In this contribution, we report a rapid optical detection method of pathogens using Staphylococcus aureus (S. aureus) as the model analyte based on the molecular recognition of immunoglobulin with cell wall-associated Protein A (SpA). It was found that the molecular recognition of human immunoglobulin (IgG) with protein A on the cell wall of S. aureus on glass slide sensing area could result in strong surface enhanced light scattering (SELS) signals, and the SELS intensity (deltaI) increases proportionally with the concentration of S. aureus over the range of 2.5x10(5)-1.0x10(8) CFU mL(-1) with right angle light scattering (RALS) signals detection mode. In order to identify the solid support based molecular recognition between IgG with SpA, we also employed water-soluble CdS quantum dots (CdS-QDs) as a fluorescent marker for IgG by immobilizing the IgG onto the surfaces of CdS-QDs through covalent binding in order to generate recognition probes for SpA on the cell wall of S. aureus. Consequently, the fluorescent method also showed that the detection for pathogens with solid supports is reliable based on the molecular recognition of IgG with SpA.
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Affiliation(s)
- Zhong De Liu
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
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29
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Prosperi D, Morasso C, Tortora P, Monti D, Bellini T. Avidin Decorated Core–Shell Nanoparticles for Biorecognition Studies by Elastic Light Scattering. Chembiochem 2007; 8:1021-8. [PMID: 17503421 DOI: 10.1002/cbic.200600542] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this paper, a straightforward method based on elastic light scattering is shown to provide a sensitive and reliable tool for the quantitative determination of protein-ligand interactions that occur at the surface of suitably designed core-shell nanoparticles. The assay makes use of monodisperse nanocolloids that have minimal optical contrast with the aqueous environment. By properly coating the particles with avidin and oligo(ethylene glycol)-based amphiphiles, we developed a hybrid system that combines the availability of standard ligands with the necessary bioinvisibility towards the accidental adsorption of nonspecific macromolecules. This probe was employed to detect interactions between different kinds of biotinylated proteins, and it revealed high specificity and affinities in the low nanomolar range. In particular, we obtained an efficient avidin anchorage of biotinylated protein A on the surface of the nanoparticles, which we exploited as a functional probe for the rapid, quantitative, picomolar detection of human IgG antibodies. Overall, these light-scattering-based nanosensors appear as a simple and highly informative tool for proteomics studies.
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Affiliation(s)
- Davide Prosperi
- Istituto di Scienze e Tecnologie Molecolari, National Research Council (CNR), Via Golgi 19, 20133 Milano, Italy.
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31
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Li J, Wang X, Wang C, Chen B, Dai Y, Zhang R, Song M, Lv G, Fu D. The Enhancement Effect of Gold Nanoparticles in Drug Delivery and as Biomarkers of Drug-Resistant Cancer Cells. ChemMedChem 2007; 2:374-8. [PMID: 17206735 DOI: 10.1002/cmdc.200600264] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The enhancement effect of 3-mercaptopropionic acid capped gold nanoparticles (NPs) in drug delivery and as biomarkers of drug-resistant cancer cells has been demonstrated through fluorescence microscopy and electrochemical studies. The results of cell viability experiments and confocal fluorescence microscopy studies illustrate that these functionalized Au NPs could play an important role in efficient drug delivery and biomarking of drug-resistant leukemia K562/ADM cells. This could be explored as a novel strategy to inhibit multidrug resistance in targeted tumor cells and as a sensitive method for the early diagnosis of certain cancers. Our observations also indicate that the interaction between the functionalized Au NPs and biologically active molecules on the surface of leukemia cells may contribute the observed enhancement in cellular drug uptake.
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Affiliation(s)
- Jingyuan Li
- State Key Lab of Bioelectronics (Chien-Shiung WU Laboratory), Southeast University, Nanjing, PR China
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32
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Acharya G, Doorneweerd DD, Chang CL, Henne WA, Low PS, Savran CA. Label-Free Optical Detection of Anthrax-Causing Spores. J Am Chem Soc 2007; 129:732-3. [PMID: 17243788 DOI: 10.1021/ja0656649] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ghanashyam Acharya
- Schools of Mechanical Engineering, Biomedical Engineering, and Electrical and Computer Engineering, Birck Nanotechnology Center, and Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
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33
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Sun H, Zhang Y, Fung Y. Flow analysis coupled with PQC/DNA biosensor for assay of E. coli based on detecting DNA products from PCR amplification. Biosens Bioelectron 2006; 22:506-12. [PMID: 16971109 DOI: 10.1016/j.bios.2006.08.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2006] [Revised: 07/30/2006] [Accepted: 08/09/2006] [Indexed: 11/18/2022]
Abstract
A flow-through PQC/DNA biosensor system is developed by combining sequential flow polymerase chain reaction (PCR) products denaturing prior to piezoelectric quartz crystal (PQC) detection via hybridization of ssDNA. The PQC/DNA biosensor is fabricated based on complex formation of neutravidin/biotinylated probe in 0.2M NaCl in TE buffer (10mM Tris, 1mM EDTA, pH 7.5). Results show that the coating fabricated provides a desirable quality with satisfactory performance. Its application for Escherichia coli detection under controlled flow at 0.02 mL/min for denaturing PCR products and 10 mL/min for transferring solution between reactors and delivering samples to detector to reduce rehybridization leads to significant improvement in repeatability (R.S.D.<6%, n=5) and sensitivity (DeltaF=34 Hz/1000 E. coli cells) as compared to existing manual method (R.S.D.=19%, n=5 and DeltaF=26 Hz/1000 E. coli cells, respectively). Down to 23 E. coli cells are detected, satisfying the HKEPD requirements for E. coli count in beach water.
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Affiliation(s)
- Hui Sun
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
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