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Open AccessCommunication

High-Sensitivity Dual-Probe Detection of Urinary miR-141 in Cancer Patients via a Modified Screen-Printed Carbon Electrode-Based Electrochemical Biosensor

1
Division of Colorectal Surgery, Department of Surgery, Mackay Memorial Hospital, Taipei City 104, Taiwan
2
Department of Chemical Engineering and Biotechnology, Graduate Institute of Biochemical and Biomedical Engineering, National Taipei University of Technology, Taipei City 106, Taiwan
3
Department of General Medicine, Mater Misericordiae University Hospital, 351402 Dublin, Ireland
4
Department of Nursing, College of Medicine, Fu Jen Catholic University, New Taipei City 242, Taiwan
5
Division of Urology, Department of Surgery, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
*
Authors to whom correspondence should be addressed.
Academic Editor: María Jesús Lobo-Castañón
Sensors 2021, 21(9), 3183; https://doi.org/10.3390/s21093183
Received: 24 March 2021 / Revised: 27 April 2021 / Accepted: 27 April 2021 / Published: 3 May 2021
(This article belongs to the Special Issue Biosensors in Clinical Applications)
The screening and diagnosis of cancer are hallmarks of medicine in the aging population. Recently, microRNAs have shown potential for use as biomarkers, which could advance the field of diagnostics. The presence of miRNA-141 in the serum has been well described in several malignancies. However, the invasive approach used for sampling represents the major limitation for its practical application and, hence, its notable absence as a method for screening the general population. In light of this, we aimed to develop a high-sensitivity microRNA (miR) biosensor for application in the diagnosis of all miR-141-associated cancers, such as colorectal cancer (CRC) and breast cancer (BC). The novelty lies in our dual-probe design, which is reliant on the hybridization of the fluorescein isothiocyanate (FITC) targeting probe onto an existing sample of urinary miR-141 in the first step, followed by complementary binding with a biotinylated probe that has been coated on a modified screen-printed carbon electrode (SPCE). The hybridization of the probe and sensor produces signals via the catalytic reduction of H2O2 at HRP-modified SPCEs in the presence of H2O, which was measured by either cyclic voltammetry or chronoamperometry (CA) currents. In our study, the detection and expression of miR-141 in a cohort of colorectal cancer (n = 6) and breast cancer (n = 4) samples showed that its levels were significantly higher than in a healthy cohort (n = 9) (p < 0.004). Moreover, our miR sensor demonstrated high stability, reliability, and sensitivity (p < 0.0001). This work hopefully provides new information for the detection and monitoring of de novo and existing cancers. View Full-Text
Keywords: urine microRNA; miR-141; biosensors; cancer urine microRNA; miR-141; biosensors; cancer
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MDPI and ACS Style

Leung, W.-H.; Pang, C.-C.; Pang, S.-N.; Weng, S.-X.; Lin, Y.-L.; Chiou, Y.-E.; Pang, S.-T.; Weng, W.-H. High-Sensitivity Dual-Probe Detection of Urinary miR-141 in Cancer Patients via a Modified Screen-Printed Carbon Electrode-Based Electrochemical Biosensor. Sensors 2021, 21, 3183. https://doi.org/10.3390/s21093183

AMA Style

Leung W-H, Pang C-C, Pang S-N, Weng S-X, Lin Y-L, Chiou Y-E, Pang S-T, Weng W-H. High-Sensitivity Dual-Probe Detection of Urinary miR-141 in Cancer Patients via a Modified Screen-Printed Carbon Electrode-Based Electrochemical Biosensor. Sensors. 2021; 21(9):3183. https://doi.org/10.3390/s21093183

Chicago/Turabian Style

Leung, Wai-Hung; Pang, Chi-Chia; Pang, Sow-Neng; Weng, Sheng-Xiang; Lin, Yu-Lun; Chiou, Yueh-Er; Pang, See-Tong; Weng, Wen-Hui. 2021. "High-Sensitivity Dual-Probe Detection of Urinary miR-141 in Cancer Patients via a Modified Screen-Printed Carbon Electrode-Based Electrochemical Biosensor" Sensors 21, no. 9: 3183. https://doi.org/10.3390/s21093183

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