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Lin S, Wang J, Wang X, Xia S, Wu L. Simple and sensitive sandwich-like electrochemical immunosensing strategy for D-dimer based on cyclodextrin-carbon nanotube and nanogold-ferrocene. Heliyon 2024; 10:e28793. [PMID: 38601570 PMCID: PMC11004742 DOI: 10.1016/j.heliyon.2024.e28793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/25/2024] [Accepted: 03/25/2024] [Indexed: 04/12/2024] Open
Abstract
D-dimer is a very important biomarker about sepsis, pulmonary thromboembolism and atherosclerosis, thus designing effective and sensitive method for its detection is of great significance. Herein, by synthesizing β-cyclodextrin-carbon nanotube nanohybrid (CNTs-CD) as the carrier to assemble the initial antibody (Ab1) of D-dimer, immobilizing secondary antibody (Ab2) and sulfydryl ferrocene (Fc) on the nanogold (Au) particles surface as the signaling amplifier (Ab2-Au-Fc), a low cost, simple, sensitive and effective sandwich-like electrochemical immunosensing (SEI) platform of D-dimer was proposed in this work for the first time. Briefly, CNTs shows large specific area and superior electroconductivity, and CD provides high host guest recognition ability that could bound with Ab1; meanwhile, the Fc probe offers stable current response which are proportionable positively to the level of D-dimer. Under the best conditions, the designed SEI platform exhibits prominent analytical performances for D-dimer: low detection limit of 3.0 ng mL-1 and large linearity of 10.0-800.0 ng mL-1. In addition, the selectivity, stability and reproducibility as well as real applications of the proposed SEI assay were evaluated and the obtained results are satisfactory.
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Affiliation(s)
| | | | - Xiaoqin Wang
- Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, PR China
| | - Suqin Xia
- Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, PR China
| | - Ling Wu
- Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, PR China
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Nirbhaya V, Chandra R, Kumar S. Nanoengineered phosphorus doped graphitic carbon nitride based ultrasensitive biosensing platform for Swine flu detection. Colloids Surf B Biointerfaces 2023; 230:113504. [PMID: 37597493 DOI: 10.1016/j.colsurfb.2023.113504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 08/02/2023] [Accepted: 08/05/2023] [Indexed: 08/21/2023]
Abstract
In the present study, we developed an amino-polyindole modified phosphorus doped graphitic carbon nitride nanomaterial (APIN/P-g-C3N4) based immunosensing biochip for Serum amyloid A (SAA) biomarker towards early diagnosis of Swine flu. The P-g-C3N4 was synthesis via polycondensation and functionalized with APIN. Further, the biochip was fabricated by modifying the working area of SPE with APIN/P-g-C3N4 using drop cast method, APIN introduced the larger loading of -NH2 group moieties onto P-g-C3N4 matrix and benefitted to reinforced the biomolecules via covalent linkages. The monoclonal anti-SAA was conjugated onto APIN/P-g-C3N4/SPE using EDC-NHS chemistry and BSA was added for non-specific site blocking. The structural, chemical, composition and morphological characteristics of the synthesized, functionalized nanomaterial and fabricated biochips were investigated by XRD, XPS, FT-IR spectroscopy, SEM, FE-SEM and TEM techniques. Further, the electrochemical characterization and response studies of fabricated biochip were analyzed using the CV and DPV techniques. Based on the analytical performance of the proposed immunosensing biochip i.e. BSA/anti-SAA/APIN/P-g-C3N4/SPE, it is capable to detect SAA protein with ultra sensitivity of 79.5 μA log (mL ng-1) cm-2, ultralow limit of detection of 5 ng mL-1 and wider linear detection range of 5 ng mL-1-500 μg mL-1 with quick response time of 10 min. Moreover, the fabricated immunosensing biochips was used to analyse SAA protein in spiked serum samples and the achieved results demonstrated the good agreement with the electrochemical response observed in standard SAA protein samples in analytical solution. The proposed biochip can provide insights for developing a wide range of clinical screening tools for detecting various contagious diseases.
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Affiliation(s)
- Vishakha Nirbhaya
- Department of Chemistry, University of Delhi, Delhi 110007, India; Department of Applied Science, Meerut Institute of Engineering and Technology, Meerut 250005, India
| | - Ramesh Chandra
- Department of Chemistry, University of Delhi, Delhi 110007, India; Institute of Nano Medical Sciences, University of Delhi, Delhi 110007, India
| | - Suveen Kumar
- Department of Chemistry, University of Delhi, Delhi 110007, India.
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Yadav S, Sadique MA, Ranjan P, Khan R. Synergistically functionalized molybdenum disulfide-reduced graphene oxide nanohybrid based ultrasensitive electrochemical immunosensor for real sample analysis of COVID-19. Anal Chim Acta 2023; 1265:341326. [PMID: 37230571 DOI: 10.1016/j.aca.2023.341326] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/04/2023] [Accepted: 05/04/2023] [Indexed: 05/27/2023]
Abstract
Herein, we have proposed a straightforward and label-free electrochemical immunosensing strategy supported on a glassy carbon electrode (GCE) modified with a biocompatible and conducting biopolymer functionalized molybdenum disulfide-reduced graphene oxide (CS-MoS2/rGO) nanohybrid to investigate the SARS-CoV-2 virus. CS-MoS2/rGO nanohybrid-based immunosensor employs recombinant SARS-CoV-2 Spike RBD protein (rSP) that specifically identifies antibodies against the SARS-CoV-2 virus via differential pulse voltammetry (DPV). The antigen-antibody interaction diminishes the current responses of the immunosensor. The obtained results indicate that the fabricated immunosensor is extraordinarily capable of highly sensitive and specific detection of the corresponding SARS-CoV-2 antibodies with a LOD of 2.38 zg mL-1 in phosphate buffer saline (PBS) samples over a broad linear range between 10 zg mL-1-100 ng mL-1. In addition, the proposed immunosensor can detect attomolar concentrations in spiked human serum samples. The performance of this immunosensor is assessed using actual serum samples from COVID-19-infected patients. The proposed immunosensor can accurately and substantially differentiate between (+) positive and (-) negative samples. As a result, the nanohybrid can provide insight into the conception of Point-of-Care Testing (POCT) platforms for cutting-edge infectious disease diagnostic methods.
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Affiliation(s)
- Shalu Yadav
- CSIR - Advanced Materials and Processes Research Institute (AMPRI), Bhopal - 462026, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India
| | - Mohd Abubakar Sadique
- CSIR - Advanced Materials and Processes Research Institute (AMPRI), Bhopal - 462026, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India
| | - Pushpesh Ranjan
- CSIR - Advanced Materials and Processes Research Institute (AMPRI), Bhopal - 462026, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India
| | - Raju Khan
- CSIR - Advanced Materials and Processes Research Institute (AMPRI), Bhopal - 462026, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India.
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Pohanka M. Immunosensors for Assay of Toxic Biological Warfare Agents. BIOSENSORS 2023; 13:402. [PMID: 36979614 PMCID: PMC10046508 DOI: 10.3390/bios13030402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/17/2023] [Accepted: 03/19/2023] [Indexed: 06/18/2023]
Abstract
An immunosensor for the assay of toxic biological warfare agents is a biosensor suitable for detecting hazardous substances such as aflatoxin, botulinum toxin, ricin, Shiga toxin, and others. The application of immunosensors is used in outdoor assays, point-of-care tests, as a spare method for more expensive devices, and even in the laboratory as a standard analytical method. Some immunosensors, such as automated flow-through analyzers or lateral flow tests, have been successfully commercialized as tools for toxins assay, but the research is ongoing. New devices are being developed, and the use of advanced materials and assay techniques make immunosensors highly competitive analytical devices in the field of toxic biological warfare agents assay. This review summarizes facts about current applications and new trends of immunosensors regarding recent papers in this area.
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Affiliation(s)
- Miroslav Pohanka
- Faculty of Military Health Sciences, University of Defense, Trebesska 1575, CZ-50001 Hradec Kralove, Czech Republic
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Martins G, Gogola JL, Budni LH, Papi MA, Bom MA, Budel ML, de Souza EM, Müller-Santos M, Beirão BC, Banks CE, Marcolino-Junior LH, Bergamini MF. Novel approach based on GQD-PHB as anchoring platform for the development of SARS-CoV-2 electrochemical immunosensor. Anal Chim Acta 2022; 1232:340442. [PMID: 36257733 PMCID: PMC9529294 DOI: 10.1016/j.aca.2022.340442] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 08/30/2022] [Accepted: 09/22/2022] [Indexed: 11/01/2022]
Abstract
In the present work, we report an innovative approach for immunosensors construction. The experimental strategy is based on the anchoring of biological material at screen-printed carbon electrode (SPE) modified with electrodeposited Graphene Quantum Dots (GQD) and polyhydroxybutyric acid (PHB). It was used as functional substract basis for the recognition site receptor-binding domain (RBD) from coronavirus spike protein (SARS-CoV-2), for the detection of Anti-S antibodies (AbS). SEM images and EDS spectra suggest an interaction of the protein with GQD-PHB sites at the electrode surface. Differential pulse voltametric (DPV) measurements were performed before and after incubation, in presence of the target, shown a decrease in voltametric signal of an electrochemical probe ([Fe(CN)6]3/4-). Using the optimal experimental conditions, analytical curves were performed in PBS and human serum spiked with AbS showing a slight matrix effect and a relationship between voltametric signal and AbS concentration in the range of 100 ng mL-1 and 10 μg mL-1. The selectivity of the proposed sensor was tested against yellow fever antibodies (YF) and the selective layer on the electrode surface did not interact with these unspecific antibodies. Eight samples of blood serum were analyzed and 87.5% of these total investigated provided adequate results. In addition, the present approach showed better results against traditional EDC/NHS reaction with enhancements in time and the possibility to develop an immunosensor in a single drop, since the proteins can be anchored prior to the electrode modification step.
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Affiliation(s)
- Gustavo Martins
- Laboratório de Sensores Eletroquímicos (LabSensE), Departamento de Química, Universidade Federal do Paraná (UFPR), CP 19032, CEP, 81531-990, Curitiba, PR, Brazil
| | - Jeferson L. Gogola
- Laboratório de Sensores Eletroquímicos (LabSensE), Departamento de Química, Universidade Federal do Paraná (UFPR), CP 19032, CEP, 81531-990, Curitiba, PR, Brazil
| | - Lucas H. Budni
- Laboratório de Sensores Eletroquímicos (LabSensE), Departamento de Química, Universidade Federal do Paraná (UFPR), CP 19032, CEP, 81531-990, Curitiba, PR, Brazil
| | - Maurício A. Papi
- Laboratório de Sensores Eletroquímicos (LabSensE), Departamento de Química, Universidade Federal do Paraná (UFPR), CP 19032, CEP, 81531-990, Curitiba, PR, Brazil
| | - Maritza A.T. Bom
- Núcleo de Fixação de Nitrogênio (NFIX), Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná (UFPR), CP: 19046, CEP: 81531-980, Curitiba, PR, Brazil
| | - Maria L.T. Budel
- Núcleo de Fixação de Nitrogênio (NFIX), Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná (UFPR), CP: 19046, CEP: 81531-980, Curitiba, PR, Brazil
| | - Emanuel M. de Souza
- Núcleo de Fixação de Nitrogênio (NFIX), Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná (UFPR), CP: 19046, CEP: 81531-980, Curitiba, PR, Brazil
| | - Marcelo Müller-Santos
- Núcleo de Fixação de Nitrogênio (NFIX), Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná (UFPR), CP: 19046, CEP: 81531-980, Curitiba, PR, Brazil
| | - Breno C.B. Beirão
- Laboratório de Imunologia Comparada, Departamento de Patologia Básica, Universidade Federal do Paraná (UFPR), CEP: 81531-980, Curitiba, PR, Brazil
| | - Craig E. Banks
- Faculty of Science and Engineering, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, United Kingdom
| | - Luiz H. Marcolino-Junior
- Laboratório de Sensores Eletroquímicos (LabSensE), Departamento de Química, Universidade Federal do Paraná (UFPR), CP 19032, CEP, 81531-990, Curitiba, PR, Brazil
| | - Márcio F. Bergamini
- Laboratório de Sensores Eletroquímicos (LabSensE), Departamento de Química, Universidade Federal do Paraná (UFPR), CP 19032, CEP, 81531-990, Curitiba, PR, Brazil,Corresponding author
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