English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/171261
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Título

Amperometric determination of endoglin in human serum using disposable immunosensors constructed with poly(pyrrolepropionic) acid-modified electrodes

AutorMartínez-Periñán, E.; Sánchez-Tirado, E.; González-Cortés, Araceli; Barderas, Rodrigo ; Sánchez-Puelles, José María ; Martínez-Santamaría, L.; Campuzano, Susana ; Yáñez-Sedeño, Pilar; Pingarrón, J.M.
Palabras claveEndoglin
CD105
Human serum
Electrochemical immunosensor,
Serum
Fecha de publicación1-dic-2018
EditorElsevier
CitaciónElectrochimica Acta 292: 887-894 (2018)
ResumenAn amperometric immunosensor for the determination of the biomarker endoglin (CD105) to comply with the requirements of sensitivity and accuracy demanded in clinical practice is reported in this work. The immunosensing platform is implemented onto disposable electrodes modified with poly(pyrrolepropionic) acid (pPPA). The methodology involves a sandwich configuration and labeling of the biotinylated detector antibody with poly-HRP-streptavidin for signal amplification. Amperometric detection of hydrogen peroxide reduction in the presence of HQ was employed as analytical readout. The different steps involved in the immunosensor preparation were monitored by electrochemical impedance spectroscopy. The resulting immunosensor provided a linear range between 0.18 and 20 ng mL-1, adequate for the determination of CD105 in serum, with a detection limit (LOD) of 140 pg mL−1. These analytical characteristics improve those reported previously for other electrochemical immunosensors. A comparison with immunosensors prepared using other electrochemical scaffolds for anti-CD105 immobilization involving carboxylated doubled walled carbon nanotubes or modification by grafting, showed that a better performance was achieved using pPPA-modified SPCEs. A good reproducibility of the measurements, an excellent storage stability of the anti-CD105-pPPA/SPCE bioplatforms and an excellent selectivity of the resulting immunosensors were found. The usefulness of the immunosensors was tested by analyzing human serum samples collected from healthy individuals and patients of colorectal, breast and lung cancer and epidermolysis bullosa. The results were successfully validated against those provided by an ELISA kit.
Descripción24 p.-6 fig.-2 tab.
Versión del editorhttps://doi.org/10.1016/j.electacta.2018.10.015
URIhttp://hdl.handle.net/10261/171261
DOI10.1016/j.electacta.2018.10.015
ISSN0013-4686
Aparece en las colecciones: (CIB) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Electrochimica Acta-Martínez-Periñan_2018.pdf Embargado hasta 1 de diciembre de 2019Postprint1,05 MBAdobe PDFVista previa
Visualizar/Abrir     Petición de una copia
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.