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

被引:21
作者
Leung, Wai-Hung [1 ]
Pang, Chi-Chia [2 ]
Pang, Sow-Neng [3 ]
Weng, Sheng-Xiang [2 ]
Lin, Yu-Lun [2 ]
Chiou, Yueh-Er [4 ]
Pang, See-Tong [5 ]
Weng, Wen-Hui [2 ]
机构
[1] Mackay Mem Hosp, Div Colorectal Surg, Dept Surg, Taipei 104, Taiwan
[2] Natl Taipei Univ Technol, Grad Inst Biochem & Biomed Engn, Dept Chem Engn & Biotechnol, Taipei 106, Taiwan
[3] Mater Misericordiae Univ Hosp, Dept Gen Med, Dublin 351402, Ireland
[4] Fu Jen Catholic Univ, Dept Nursing, Coll Med, New Taipei 242, Taiwan
[5] Chang Gung Mem Hosp, Div Urol, Dept Surg, Taoyuan 333, Taiwan
关键词
urine microRNA; miR-141; biosensors; cancer; EXTRACELLULAR VESICLES; MICRORNAS; MICROVESICLES; DIAGNOSIS; EXOSOMES;
D O I
10.3390/s21093183
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
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.
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页数:11
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