dc.contributor.author | Redondo Fernández, Guillermo | |
dc.contributor.author | Cid Barrio, Laura | |
dc.contributor.author | Fernández Fernández-Argüelles, María Teresa | |
dc.contributor.author | Escosura Muñiz, Alfredo de la | |
dc.contributor.author | Soldado Cabezuelo, Ana Belén | |
dc.contributor.author | Costa Fernández, José Manuel | |
dc.date.accessioned | 2024-10-09T06:19:02Z | |
dc.date.available | 2024-10-09T06:19:02Z | |
dc.date.issued | 2024 | |
dc.identifier.citation | Talanta, 275 (2024); doi:10.1016/j.talanta.2024.126095 | |
dc.identifier.issn | 0039-9140 | |
dc.identifier.uri | https://hdl.handle.net/10651/74967 | |
dc.description.abstract | One of the current challenges in medicine is to achieve a rapid and unequivocal detection and quantification of
extremely low levels of disease biomarkers in complex biological samples. Here, we present the development and
analytical evaluation of a low-cost smartphone-based system designed for ultrasensitive detection of the prostatespecific antigen (PSA) using two detection alternatives: electrochemical or optical, by coupling the smartphone
with a portable potentiostat or magnifying lenses. An antibody tagged with gold nanoparticles (AuNPs), and
indium tin oxide coated polyethylene terephthalate platform (ITO-PET) have been used to develop a sandwichtype immunoassay. Then, a controlled silver electrodeposition on the AuNPs surface is carried out, enhancing
their size greatly. Due to such strong nanoparticle-size amplification (from nm to μm), the final detection can be
dual, by measuring current intensity or the number of silver-enlarged microstructures generated. The proposed
strategies exhibited limit detections (LOD) of 102 and 37 fg/mL for electrochemical and optical detection
respectively. The developed immunosensor reaches excellent selectivity and performance characteristics to
quantify biomarkers at clinically relevant values without any pretreatment. These proposed procedures could be
useful to check and verify possible recurrence after clinical treatment of tumors or even report levels of disease
serum biomarkers in early stages. | |
dc.description.sponsorship | Guillermo Redondo-Fernández acknowledges his PhD grant (BP20-050) from the Asturias Regional Government (Spain). Alfredo de la
Escosura-Muñiz acknowledges his “Ramón y Cajal” Research Fellow (RyC-2016-20299). This research was funded by Spanish Ministry of Science and Innovation (PID2020-117282RB-I00, MCI-20-PID2019-
109698GB-I00 and MCI-21-PID2020-115204RB-I00), and by Principado de Asturias GRUPIN IDI/2021/000081 co-financed by the Feder Programme of the European Union. Authors would like to thank to Marcos García Ocaña from Biotechnology Preparative Unit for his advice, Marta
Alonso Guervós for the help handling the confocal microscope and Angel Martínez Nistal for the development of the custom macro, both from Photonics Microscopy and Image Processing Unit of University of Oviedo. | |
dc.language.iso | eng | |
dc.relation.ispartof | Talanta | |
dc.rights | © 2024 The Authors | |
dc.rights | CC Reconocimiento – No Comercial – Sin Obra Derivada 4.0 Internacional | |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.source | Scopus | |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85190779283&doi=10.1016%2fj.talanta.2024.126095&partnerID=40&md5=4cb9f844def437eedfa0215a7d583f84 | |
dc.title | Controlled silver electrodeposition on gold nanoparticle antibody tags for ultrasensitive prostate specific antigen sensing using electrochemical and optical smartphone detection | |
dc.type | journal article | |
dc.identifier.doi | 10.1016/j.talanta.2024.126095 | |
dc.relation.projectID | BP20-050 | |
dc.relation.projectID | RyC-2016-20299 | |
dc.relation.projectID | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117282RB-I00/ES/SENSOR OPTOELECTRONICO PORTATIL Y ESTRATEGIAS DE MEDIDA PARA LA MONITORIZACION DESCENTRALIZADA EN APLICACIONES DE MEDIO AMBIENTE, AGROALIMENTACION Y CLINICAS BASADAS EN (BIO)N/ | |
dc.relation.projectID | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109698GB-I00/ES/DESARROLLO DE NANOPLATAFORMAS ANALITICAS Y ESTRATEGIAS BASADAS EN ESPECTROMETRIA DE MASAS AVANZADAS PARA LA CUANTIFICACION DE (BIO)MOLECULAS EN MUESTRAS COMPLEJAS/ | |
dc.relation.projectID | IDI/2021/000081 | |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.talanta.2024.126095 | |
dc.rights.accessRights | open access | |
dc.type.hasVersion | VoR | |