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Artículo

Microfluidic immunosensor based on mesoporous silica platform and CMK-3/poly-acrylamide-co-methacrylate of dihydrolipoic acid modified gold electrode for cancer biomarker detection

Regiart, Daniel Matias GastonIcon ; Fernández Baldo, Martín AlejandroIcon ; Villarroel Rocha, JhonnyIcon ; Messina, Germán AlejandroIcon ; Bertolino, Franco AdriánIcon ; Sapag, Manuel KarimIcon ; Timperman, Aaron T.; Raba, JulioIcon
Fecha de publicación: 04/2017
Editorial: Elsevier Science
Revista: Analytica Chimica Acta
ISSN: 0003-2670
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Químicas

Resumen

We report a hybrid glass-poly (dimethylsiloxane) microfluidic immunosensor for epidermal growth factor receptor (EGFR) determination, based on the covalent immobilization of anti-EGFR antibody (anti-EGFR) on amino-functionalized mesoporous silica (AMS) retained in the central channel of a microfluidic device. The synthetized AMS was characterized by N2 adsorption-desorption isotherm, scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and infrared spectroscopy. The cancer biomarker was quantified in human serum samples by a direct sandwich immunoassay measuring through a horseradish peroxidase-conjugated anti-EGFR. The enzymatic product was detected at −100 mV by amperometry on a sputtering gold electrode, modified with an ordered mesoporous carbon (CMK-3) in a matrix of poly-acrylamide-co-methacrylate of dihydrolipoic acid (poly(AC-co-MDHLA)) through in situ copolymerization. CMK-3/poly(AC-co-MDHLA)/gold was characterized by cyclic voltammetry, EDS and SEM. The measured current was directly proportional to the level of EGFR in human serum samples. The linear range was from 0.01 ng mL−1 to 50 ng mL−1. The detection limit was 3.03 pg mL−1, and the within- and between-assay coefficients of variation were below 5.20%. The microfluidic immunosensor is a very promising device for the diagnosis of several kinds of epithelial origin carcinomas.
Palabras clave: Cancer Biomarker , Cancer Diagnosis , Egfr , Mesoporous Silica , Microfluidic Immunosensor , Nanostructured Electrode
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/63646
DOI: https://dx.doi.org/10.1016/j.aca.2017.01.029
URL: https://linkinghub.elsevier.com/retrieve/pii/S0003267017301204
Colecciones
Articulos(INFAP)
Articulos de INST. DE FISICA APLICADA "DR. JORGE ANDRES ZGRABLICH"
Articulos(INQUISAL)
Articulos de INST. DE QUIMICA DE SAN LUIS
Citación
Regiart, Daniel Matias Gaston; Fernández Baldo, Martín Alejandro; Villarroel Rocha, Jhonny; Messina, Germán Alejandro; Bertolino, Franco Adrián; et al.; Microfluidic immunosensor based on mesoporous silica platform and CMK-3/poly-acrylamide-co-methacrylate of dihydrolipoic acid modified gold electrode for cancer biomarker detection; Elsevier Science; Analytica Chimica Acta; 963; 4-2017; 83-92
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