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García-Rodrigo L, Ramos-López C, Sánchez-Tirado E, Agüí L, González-Cortés A, Yáñez-Sedeño P, Pingarrón JM. Label-free electrochemical immunosensing of glial fibrillary acidic protein (GFAP) at synthesized rGO/MoS 2/AgNPs nanocomposite. Application to the determination in human cerebrospinal fluid. Talanta 2024; 270:125597. [PMID: 38150968 DOI: 10.1016/j.talanta.2023.125597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 12/29/2023]
Abstract
An electrochemical bioplatform involving screen-printed carbon electrodes modified with rGO/MoS2/AgNPs nanocomposites, the covalent immobilization of the specific capture antibody, and label-free detection has been developed for the determination of Glial Fibrillary Acidic Protein (GFAP). The resulting immunosensor profits the benefits of the rGO high conductivity, the pseudo-peroxidase activity of MoS2 and the electrocatalytic effect provided by AgNPs for improving the reduction current responses of hydrogen peroxide at the electrode surface. GFAP is a biomarker of central nervous system injuries has been proposed for the detection and monitoring of neurological diseases as epilepsy, encephalitis, or multiple sclerosis. For the first time, amperometric detection of the immunosensing event was performed by measuring the electrocatalytic response of hydrogen peroxide reduction at the modified electrode. Several techniques including scanning (SEM) and transmission (TEM) electron microscopies were used for the characterization of the synthesized composite whilst electrochemical impedance spectroscopy (EIS) using the redox probe Fe(CN)63-/4- was employed to evaluate the success of the steps implied in the fabrication of the immunosensor. After optimization of the involved experimental variables, a linear calibration plot for GFAP was constructed over the 0.6-100 ng mL-1 range, and a detection limit of 0.16 ng mL-1 was achieved. The developed immunosensor was successfully applied to the determination of GFAP in human cerebrospinal fluid (CSF) of patients diagnosed with encephalitis.
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Affiliation(s)
- Lorena García-Rodrigo
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain
| | - Claudia Ramos-López
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain
| | - Esther Sánchez-Tirado
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain
| | - Lourdes Agüí
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain
| | - Araceli González-Cortés
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain
| | - Paloma Yáñez-Sedeño
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain.
| | - José M Pingarrón
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain
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2
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Sánchez-Tirado E, Yáñez-Sedeño P, Pingarrón JM. Carbon-Based Enzyme Mimetics for Electrochemical Biosensing. Micromachines (Basel) 2023; 14:1746. [PMID: 37763909 PMCID: PMC10538133 DOI: 10.3390/mi14091746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 08/28/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023]
Abstract
Natural enzymes are used as special reagents for the preparation of electrochemical (bio)sensors due to their ability to catalyze processes, improving the selectivity of detection. However, some drawbacks, such as denaturation in harsh experimental conditions and their rapid de- gradation, as well as the high cost and difficulties in recycling them, restrict their practical applications. Nowadays, the use of artificial enzymes, mostly based on nanomaterials, mimicking the functions of natural products, has been growing. These so-called nanozymes present several advantages over natural enzymes, such as enhanced stability, low cost, easy production, and rapid activity. These outstanding features are responsible for their widespread use in areas such as catalysis, energy, imaging, sensing, or biomedicine. These materials can be divided into two main groups: metal and carbon-based nanozymes. The latter provides additional advantages compared to metal nanozymes, i.e., stable and tuneable activity and good biocompatibility, mimicking enzyme activities such as those of peroxidase, catalase, oxidase, superoxide dismutase, nuclease, or phosphatase. In this review article, we have focused on the use of carbon-based nanozymes for the preparation of electrochemical (bio)sensors. The main features of the most recent applications have been revised and illustrated with examples selected from the literature over the last four years (since 2020).
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Affiliation(s)
| | - Paloma Yáñez-Sedeño
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain; (E.S.-T.); (J.M.P.)
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3
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Sánchez-Tirado E, Agüí L, Sánchez-Paniagua M, González-Cortés A, López-Ruiz B, Yáñez-Sedeño P, Pingarrón JM. Serum Autoantibody Biomarkers for Management of Rheumatoid Arthritis Disease. Biosensors (Basel) 2023; 13:381. [PMID: 36979593 PMCID: PMC10046368 DOI: 10.3390/bios13030381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 03/07/2023] [Accepted: 03/12/2023] [Indexed: 06/18/2023]
Abstract
Rheumatoid arthritis (RA) is a systemic chronic autoimmune inflammatory disease that is characterized by the destruction of bone and production of autoantibodies such as rheumatoid factor (RF) and anticitrullinated protein antibodies (ACPAs). The high prevalence of this disease and the need of affordable tools for its early detection led us to prepare the first electrochemical immunoplatform for the simultaneous determination of four RA biomarkers, the autoantibodies: RF, anti-peptidyl-arginine deiminase enzyme (anti-PAD4), anti-cyclic citrullinated peptide (anti-CCP), and anti-citrullinated vimentin (anti-MCV). Functionalized magnetic beads (MBs) were used to immobilize the specific antigens, and sandwich-type immunoassays were implemented for the amperometric detection of the four autoantibodies, using the horseradish peroxidase (HRP)/H2O2/hydroquinone (HQ) system. The immunoplatform was applied to the determination of the biomarkers in human serum of twenty-two patients diagnosed with RA and four healthy individuals, and the results were validated against ELISA tests and the certified values.
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Affiliation(s)
- Esther Sánchez-Tirado
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
| | - Lourdes Agüí
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
| | - Marta Sánchez-Paniagua
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, University Complutense of Madrid, 28040 Madrid, Spain
| | - Araceli González-Cortés
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
| | - Beatriz López-Ruiz
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, University Complutense of Madrid, 28040 Madrid, Spain
| | - Paloma Yáñez-Sedeño
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
| | - José M. Pingarrón
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
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4
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Sánchez-Tirado E, Agüí L, González-Cortés A, Campuzano S, Yáñez-Sedeño P, Pingarrón JM. Electrochemical (Bio)Sensing Devices for Human-Microbiome-Related Biomarkers. Sensors (Basel) 2023; 23:837. [PMID: 36679633 PMCID: PMC9864681 DOI: 10.3390/s23020837] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/02/2023] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
The study of the human microbiome is a multidisciplinary area ranging from the field of technology to that of personalized medicine. The possibility of using microbiota biomarkers to improve the diagnosis and monitoring of diseases (e.g., cancer), health conditions (e.g., obesity) or relevant processes (e.g., aging) has raised great expectations, also in the field of bioelectroanalytical chemistry. The well-known advantages of electrochemical biosensors-high sensitivity, fast response, and the possibility of miniaturization, together with the potential for new nanomaterials to improve their design and performance-position them as unique tools to provide a better understanding of the entities of the human microbiome and raise the prospect of huge and important developments in the coming years. This review article compiles recent applications of electrochemical (bio)sensors for monitoring microbial metabolites and disease biomarkers related to different types of human microbiome, with a special focus on the gastrointestinal microbiome. Examples of electrochemical devices applied to real samples are critically discussed, as well as challenges to be faced and where future developments are expected to go.
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Guerrero S, Sánchez-Tirado E, Agüí L, González-Cortés A, Yáñez-Sedeño P, Pingarrón JM. Development of an Electrochemical CCL5 Chemokine Immunoplatform for Rapid Diagnosis of Multiple Sclerosis. Biosensors 2022; 12:bios12080610. [PMID: 36005006 PMCID: PMC9406078 DOI: 10.3390/bios12080610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/02/2022] [Accepted: 08/05/2022] [Indexed: 11/16/2022]
Abstract
Serum level of CCL5 chemokine is considered an emerging biomarker for multiple sclerosis (MS). Due to the lack of specific assays for this disease, the development of a point-of-care test for rapid detection of MS could lead to avoiding diagnostics delays. In this paper, we report the first electrochemical immunoplatform for quantification of the CCL5 biomarker at the clinically required levels, able to discriminate between patients diagnosed with MS and healthy individuals. The immunosensing device involves protein capture from biological samples by complexation with biotinylated specific antibodies immobilized onto neutravidin-functionalized microparticles and sandwich assay with anti-CCL5 antibody and IgG labelled with horseradish peroxidase (HRP) for the enzyme-catalyzed amperometric detection of H2O2 using hydroquinone (HQ) as the redox mediator. The method shows excellent analytical performance for clinical application with a wide linear range of concentrations (0.1–300 ng·mL−1 CCL5, R2 = 0.998) and a low detection limit (40 pg·mL−1 CCL5). The biosensing platform was applied to the determination of the CCL5 endogenous content in 100-fold diluted sera both from healthy individuals and patients diagnosed with MS, with no further sample treatment in just two hours. The results were successfully compared with those obtained by the ELISA methodology.
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Guerrero S, Sánchez-Tirado E, Agüí L, González-Cortés A, Yáñez-Sedeño P, Pingarrón J. Monitoring autoimmune diseases by bioelectrochemical detection of autoantibodies. Application to the determination of anti-myelin basic protein autoantibodies in serum of multiple sclerosis patients. Talanta 2022; 243:123304. [DOI: 10.1016/j.talanta.2022.123304] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 02/05/2022] [Accepted: 02/10/2022] [Indexed: 01/02/2023]
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Guerrero S, Sánchez-Tirado E, Agüí L, González-Cortés A, Yáñez-Sedeño P, Pingarrón JM. Simultaneous determination of CXCL7 chemokine and MMP3 metalloproteinase as biomarkers for rheumatoid arthritis. Talanta 2021; 234:122705. [PMID: 34364500 DOI: 10.1016/j.talanta.2021.122705] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/06/2021] [Accepted: 07/08/2021] [Indexed: 01/24/2023]
Abstract
This paper reports the preparation of the first dual electrochemical immunosensor for the simultaneous determination of the CXCL7 chemokine and the MMP3 metalloproteinase as relevant biomarkers for the better diagnosis and monitoring of rheumatoid arthritis derived from the multiple biomarkers measurement. The developed immunosensor involves the use of carboxylated magnetic beads (MBs) and dual screen-printed carbon electrodes (SPdCEs). Sandwich-type configurations implied the covalent immobilization of specific anti-CXCL7 (cAb1) or anti-MMP3 (cAb2) capture antibodies onto MBs and the use of biotinylated detection antibodies with further labelling with HRP-Strept conjugates. The resulting MBS bioconjugates were magnetically captured on the respective working electrode of the SPdCE and the determination of the antigens was accomplished by measuring the amperometric responses of H2O2 mediated by hydroquinone (HQ) at a potential value of -0.20 V. The dual immunosensor provided calibration plots with linear ranges between 1 and 75 ng mL-1 (CXCL7) (R2 = 0.997) and from 2.0 to 2000 pg mL-1 (MMP3) (R2 = 0.998) with detection limits of 0.8 ng mL-1 and 1.2 pg mL-1, respectively. The assay took 2 h 20 min for the simultaneous determination of both biomarkers. The dual immunosensor was successfully applied to the analysis of human serum from positive and negative RA patients.
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Affiliation(s)
- S Guerrero
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain
| | - E Sánchez-Tirado
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain
| | - L Agüí
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain
| | - A González-Cortés
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain.
| | - P Yáñez-Sedeño
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain.
| | - J M Pingarrón
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040, Madrid, Spain
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8
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Navarro R, Tapia-Galisteo A, Martín-García L, Tarín C, Corbacho C, Gómez-López G, Sánchez-Tirado E, Campuzano S, González-Cortés A, Yáñez-Sedeño P, Compte M, Álvarez-Vallina L, Sanz L. TGF-β-induced IGFBP-3 is a key paracrine factor from activated pericytes that promotes colorectal cancer cell migration and invasion. Mol Oncol 2020; 14:2609-2628. [PMID: 32767843 PMCID: PMC7530788 DOI: 10.1002/1878-0261.12779] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 06/30/2020] [Accepted: 08/04/2020] [Indexed: 12/14/2022] Open
Abstract
The crosstalk between cancer cells and the tumor microenvironment has been implicated in cancer progression and metastasis. Fibroblasts and immune cells are widely known to be attracted to and modified by cancer cells. However, the role of pericytes in the tumor microenvironment beyond endothelium stabilization is poorly understood. Here, we report that pericytes promoted colorectal cancer (CRC) cell proliferation, migration, invasion, stemness, and chemoresistance in vitro, as well as tumor growth in a xenograft CRC model. We demonstrate that coculture with human CRC cells induced broad transcriptomic changes in pericytes, mostly associated with TGF-β receptor activation. The prognostic value of a TGF-β response signature in pericytes was analyzed in CRC patient data sets. This signature was found to be a good predictor of CRC relapse. Moreover, in response to stimulation by CRC cells, pericytes expressed high levels of TGF-β1, initiating an autocrine activation loop. Investigation of secreted mediators and underlying molecular mechanisms revealed that IGFBP-3 is a key paracrine factor from activated pericytes affecting CRC cell migration and invasion. In summary, we demonstrate that the interplay between pericytes and CRC cells triggers a vicious cycle that stimulates pericyte cytokine secretion, in turn increasing CRC cell tumorigenic properties. Overall, we provide another example of how cancer cells can manipulate the tumor microenvironment.
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Affiliation(s)
- Rocío Navarro
- Molecular Immunology Unit, Biomedical Research Institute Puerta de Hierro-Segovia de Arana, Madrid, Spain
| | - Antonio Tapia-Galisteo
- Molecular Immunology Unit, Biomedical Research Institute Puerta de Hierro-Segovia de Arana, Madrid, Spain
| | - Laura Martín-García
- Molecular Immunology Unit, Biomedical Research Institute Puerta de Hierro-Segovia de Arana, Madrid, Spain
| | - Carlos Tarín
- Bioinformatics Unit, Biomedical Research Institute Puerta de Hierro-Segovia de Arana, Madrid, Spain.,Basic Medical Sciences Department, Faculty of Medicine, Universidad San Pablo CEU, Madrid, Spain
| | - Cesáreo Corbacho
- Pathology Department, Hospital Universitario Puerta de Hierro Majadahonda, Madrid, Spain
| | - Gonzalo Gómez-López
- Bioinformatics Unit, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Esther Sánchez-Tirado
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid (UCM), Madrid, Spain
| | - Susana Campuzano
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid (UCM), Madrid, Spain
| | - Araceli González-Cortés
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid (UCM), Madrid, Spain
| | - Paloma Yáñez-Sedeño
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid (UCM), Madrid, Spain
| | - Marta Compte
- Molecular Immunology Unit, Biomedical Research Institute Puerta de Hierro-Segovia de Arana, Madrid, Spain
| | - Luis Álvarez-Vallina
- Immunotherapy and Cell Engineering Laboratory, Department of Engineering, Aarhus University, Aarhus, Denmark.,Cancer Immunotherapy Unit (UNICA), Hospital Universitario 12 de Octubre, Madrid, Spain.,Immuno-oncology and Immunotherapy Group, Biomedical Research Institute 12 de Octubre, Madrid, Spain
| | - Laura Sanz
- Molecular Immunology Unit, Biomedical Research Institute Puerta de Hierro-Segovia de Arana, Madrid, Spain
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Sánchez-Tirado E, González-Cortés A, Yáñez-Sedeño P, Pingarrón JM. Electrochemical immunosensor for the determination of the cytokine interferon gamma (IFN-γ) in saliva. Talanta 2020; 211:120761. [PMID: 32070582 DOI: 10.1016/j.talanta.2020.120761] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 01/15/2020] [Accepted: 01/17/2020] [Indexed: 11/18/2022]
Abstract
A simple, fast and sensitive amperometric immunosensing method for the determination of the clinically relevant cytokine interferon gamma (IFN-γ) in saliva complying the requirements demanded for this kind of sample is reported. The target analyte was sandwiched between a specific capture antibody covalently immobilized on a screen-printed electrode functionalized by the diazonium salt grafting of p-aminobenzoic acid, and a biotinylated detector antibody labeled with a streptavidin-horseradish peroxidase conjugate. The amperometric responses measured at - 0.20 V vs Ag pseudo-reference electrode upon addition of hydrogen peroxide in the presence of hydroquinone as the redox mediator allowed a calibration plot with a linear range between 2.5 and 2000 pg mL-1 and a low limit of detection (1.6 pg mL-1) to be obtained. In addition, a good selectivity against other non-target proteins was achieved. The developed method was validated by analyzing a WHO 1st International Standard for IFN-γ. In addition, the immunosensor was used for the determination of the endogenous IFN-γ in saliva with results in excellent agreement with those obtained by a commercial ELISA kit.
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Affiliation(s)
- E Sánchez-Tirado
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - A González-Cortés
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - P Yáñez-Sedeño
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, 28040, Madrid, Spain.
| | - J M Pingarrón
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, 28040, Madrid, Spain
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10
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Guerrero S, Sánchez-Tirado E, Martínez-García G, González-Cortés A, Yáñez-Sedeño P, Pingarrón JM. Electrochemical biosensor for the simultaneous determination of rheumatoid factor and anti-cyclic citrullinated peptide antibodies in human serum. Analyst 2020; 145:4680-4687. [DOI: 10.1039/d0an00481b] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A dual electrochemical biosensor for the simultaneous determination of rheumatoid factor (RF) and anti-cyclic citrullinated peptide (CCPA) autoantibodies used as biomarkers for the detection of rheumatoid arthritis autoimmune disease is developed.
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Affiliation(s)
- Sara Guerrero
- Department of Analytical Chemistry
- Faculty of Chemistry
- University Complutense of Madrid
- 28040-Madrid
- Spain
| | - Esther Sánchez-Tirado
- Department of Analytical Chemistry
- Faculty of Chemistry
- University Complutense of Madrid
- 28040-Madrid
- Spain
| | - Gonzalo Martínez-García
- Department of Analytical Chemistry
- Faculty of Chemistry
- University Complutense of Madrid
- 28040-Madrid
- Spain
| | - Araceli González-Cortés
- Department of Analytical Chemistry
- Faculty of Chemistry
- University Complutense of Madrid
- 28040-Madrid
- Spain
| | - Paloma Yáñez-Sedeño
- Department of Analytical Chemistry
- Faculty of Chemistry
- University Complutense of Madrid
- 28040-Madrid
- Spain
| | - José M. Pingarrón
- Department of Analytical Chemistry
- Faculty of Chemistry
- University Complutense of Madrid
- 28040-Madrid
- Spain
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Martínez-Periñán E, Sánchez-Tirado E, González-Cortés A, Barderas R, Sánchez-Puelles J, Martínez-Santamaría L, Campuzano S, Yáñez-Sedeño P, Pingarrón J. Amperometric determination of endoglin in human serum using disposable immunosensors constructed with poly(pyrrolepropionic) acid-modified electrodes. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.10.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Sánchez-Tirado E, Arellano LM, González-Cortés A, Yáñez-Sedeño P, Langa F, Pingarrón JM. Viologen-functionalized single-walled carbon nanotubes as carrier nanotags for electrochemical immunosensing. Application to TGF-β1 cytokine. Biosens Bioelectron 2017; 98:240-247. [DOI: 10.1016/j.bios.2017.06.063] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 06/19/2017] [Accepted: 06/30/2017] [Indexed: 11/25/2022]
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13
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Sánchez-Tirado E, González-Cortés A, Yudasaka M, Iijima S, Langa F, Yáñez-Sedeño P, Pingarrón J. Electrochemical immunosensor for the determination of 8-isoprostane aging biomarker using carbon nanohorns-modified disposable electrodes. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2016.11.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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14
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Sánchez-Tirado E, Salvo C, González-Cortés A, Yáñez-Sedeño P, Langa F, Pingarrón JM. Electrochemical immunosensor for simultaneous determination of interleukin-1 beta and tumor necrosis factor alpha in serum and saliva using dual screen printed electrodes modified with functionalized double-walled carbon nanotubes. Anal Chim Acta 2017; 959:66-73. [PMID: 28159106 DOI: 10.1016/j.aca.2016.12.034] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 12/21/2016] [Accepted: 12/23/2016] [Indexed: 11/30/2022]
Abstract
Dual screen-printed carbon electrodes modified with 4-carboxyphenyl-functionalized double-walled carbon nanotubes (HOOC-Phe-DWCNTs/SPCEs) have been used as scaffolds for the preparation of electrochemical immunosensors for the simultaneous determination of the cytokines Interleukin-1β (IL-1β) and factor necrosis tumor α (TNF-α). IL-1β. Capture antibodies were immobilized onto HOOC-Phe-DWCNTs/SPCEs in an oriented form making using the commercial polymeric coating Mix&Go™. Sandwich type immunoassays with amperometric signal amplification through the use of poly-HRP-streptavidin conjugates and H2O2 as HRP substrate and hydroquinone as redox mediator were implemented. Upon optimization of the experimental variables affecting the immunosensor performance, the dual immunosensor allows ranges of linearity extending between 0.5 and 100 pg/mL and from 1 to 200 pg/mL for IL-1β and TNF-α, respectively, these ranges being adequate for the determination of the cytokines in clinical samples. The achieved limits of detection were 0.38 pg/mL (IL-1β) and 0.85 pg/mL (TNF-α). In addition, the dual immunosensor exhibits excellent reproducibility of the measurements, storage stability of the anti-IL-Phe-DWCNTs/SPCE and anti-TNF-Phe-DWCNTs/SPCE conjugates, and selectivity as well as negligible cross-talking. The dual immunosensor was applied to the simultaneous determination of IL-1β and TNF-α in human serum spiked at clinically relevant concentration levels and in real saliva samples.
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Affiliation(s)
- E Sánchez-Tirado
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - C Salvo
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - A González-Cortés
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - P Yáñez-Sedeño
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain.
| | - F Langa
- Instituto de Nanociencia, Nanotecnología y Materiales Moleculares (INAMOL), Universidad de Castilla-La Mancha, 45071, Toledo, Spain
| | - J M Pingarrón
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
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Sánchez-Tirado E, Martínez-García G, González-Cortés A, Yáñez-Sedeño P, Pingarrón JM. Electrochemical immunosensor for sensitive determination of transforming growth factor (TGF) - β1 in urine. Biosens Bioelectron 2016; 88:9-14. [PMID: 27297187 DOI: 10.1016/j.bios.2016.05.093] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 05/11/2016] [Accepted: 05/30/2016] [Indexed: 01/15/2023]
Abstract
The first amperometric immunosensor for the quantification of TGF-β1, a cytokine proposed as a biomarker for patients having or at risk for renal disease, is described in this work. The immunosensor design involves disposable devices using carboxylic acid-functionalized magnetic microparticles supported onto screen-printed carbon electrodes and covalent immobilization of the specific antibody for TGF-β1 using Mix&Go polymer. A sandwich-type immunoassay was performed using biotin-anti-TGF and conjugation with peroxidase-labeled streptavidin (poly-HRP-Strept) polymer. Amperometric measurements were carried out at -0.20V by adding hydrogen peroxide solution onto the electrode surface in the presence of hydroquinone as the redox mediator. The calibration plot allowed a range of linearity extending between 15 and 3000pg/mL TGF-β1 which is adequate for the determination of the cytokine in plasma and urine. The limit of detection, 10pg/mL, is notably improved with respect to those obtained with ELISA kits. The usefulness of the immunosensor for the determination of low TGF-β1 concentrations in real samples was evaluated by analyzing spiked urine at different pg/mL concentration levels.
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Affiliation(s)
- E Sánchez-Tirado
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
| | - G Martínez-García
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
| | - A González-Cortés
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
| | - P Yáñez-Sedeño
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain.
| | - J M Pingarrón
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
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Sánchez-Tirado E, González-Cortés A, Yáñez-Sedeño P, Pingarrón JM. Carbon nanotubes functionalized by click chemistry as scaffolds for the preparation of electrochemical immunosensors. Application to the determination of TGF-beta 1 cytokine. Analyst 2016; 141:5730-5737. [DOI: 10.1039/c6an00941g] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first electrochemical immunosensor for TGF-β1 cytokine in human serum based on carbon nanotubes functionalized by click chemistry is reported.
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Affiliation(s)
- E. Sánchez-Tirado
- Department of Analytical Chemistry
- Faculty of Chemistry
- University Complutense of Madrid
- 28040-Madrid
- Spain
| | - A. González-Cortés
- Department of Analytical Chemistry
- Faculty of Chemistry
- University Complutense of Madrid
- 28040-Madrid
- Spain
| | - P. Yáñez-Sedeño
- Department of Analytical Chemistry
- Faculty of Chemistry
- University Complutense of Madrid
- 28040-Madrid
- Spain
| | - J. M. Pingarrón
- Department of Analytical Chemistry
- Faculty of Chemistry
- University Complutense of Madrid
- 28040-Madrid
- Spain
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