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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Novel enzyme-free immunomagnetic microfluidic device based on Co0.25Zn0.75Fe2O4 for cancer biomarker detection

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Proenca, Camila A. [1] ; Baldo, Thaisa A. [1] ; Freitas, Tayane A. [1] ; Materon, Elsa M. [1] ; Wong, Ademar [1] ; Duran, Andres A. [2] ; Melendez, Matias E. [3] ; Zambrano, Gustavo [2] ; Faria, Ronaldo C. [1]
Total Authors: 9
[1] Univ Fed Sao Carlos, Dept Chem, CP 676, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Valle, Dept Phys, Calle 13 100-00, Cali - Colombia
[3] Barretos Canc Hosp, Mol Oncol Res Ctr, BR-14784400 Barretos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Analytica Chimica Acta; v. 1071, p. 59-69, SEP 13 2019.
Web of Science Citations: 3

Early diagnosis of cancer by biomarker detection has been widely studied since it can lead to an increase in patient survival rates. Magnetic nanoparticles (MNPs) play an important role in this field acting as a valuable tool in the biomarker immunocapture and detection. In this work, Co0.25Zn0.75Fe2O4 (CoZnFeONPs) nanoparticles were synthesized and applied as enzyme mimics of peroxidase-like catalysis in a disposable enzyme-free microfluidic immunoarray device (mu ID). The catalytic activity of CoZnFeONPs was evaluated by hydrogen peroxide detection using cyclic voltammetry and the apparent Michaelis-Menten constant was estimated by Lineweaver-Burk equation showing good K-m values. In mu ID, the immunosensors were assembled with monoclonal antibody against CYFRA 21-1 covalently immobilized on graphene oxide previously deposited on the screen-printed carbon-based electrodes. Under optimized conditions, the method presented a good linear response for CYFRA 21-1 in the range of 3.9 -1000 fg mL(-1) achieving an ultralow limit of detection (LOD) of 0.19 fg mL(-1). For comparison, Fe3O4 nanoparticles (FeONPs) was also synthetized and presented results slight inferior to that obtained with CoZnFeONPs. The methods developed using both MNPs exhibited countless advantages when compared with the immunosensors developed for CYFRA-21-1, previously reported in the literature. The methods were successful applied for the detection of CYFRA 21-1 in real serum samples of healthy and prostate cancer patients and showed good correlation with results obtained with the enzyme-linked immunosorbent assay (ELISA). The CoZnFeONPs associated with the disposable microfluidic immunoarray device provides a simple and effective method for biomarker detection that could satisfy the need for a low-cost and rapid test for early diagnosis of cancer. (C) 2019 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 15/19890-1 - Development of methods for diagnosis of diseases using magnetic particles and an array of imunossensors in a disposable microfluidic system
Grantee:Ronaldo Censi Faria
Support type: Regular Research Grants
FAPESP's process: 16/00991-5 - Study of Detoxification Enzymes Interaction with chemotherapeutic drugs and its relationship with chemoresistance
Grantee:Elsa María Materón Vásques
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/24053-7 - Development of simple electrochemical methods for the detection of biomarkers for the diagnosis of diseases
Grantee:Ronaldo Censi Faria
Support type: Regular Research Grants