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Practical magnetic bead-based capillary electrophoresis with laser-induced fluorescence for detecting endogenous miRNA in plasma
- Title
- Practical magnetic bead-based capillary electrophoresis with laser-induced fluorescence for detecting endogenous miRNA in plasma
- Authors
- Ban; Eunmi; Lim; Hee Ji; Kwon; Haejin; Song; Eun Joo
- Ewha Authors
- 송은주; 반은미
- SCOPUS Author ID
- 송은주; 반은미
- Issue Date
- 2023
- Journal Title
- Heliyon
- ISSN
- 2405-8440
- Citation
- Heliyon vol. 9, no. 12
- Keywords
- Cancer biomarker; Capillary electrophoresis; Magnetic bead; MicroRNA
- Publisher
- Elsevier Ltd
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- MicroRNAs (miRNAs) are small, non-coding RNAs crucial for gene regulation and implicated in various human diseases. Their potential as clinical prognostic and diagnostic biomarkers in biological fluids necessitates reliable detection methods. In this study, a combination of streptavidin-coupled magnetic beads and capillary electrophoresis with laser-induced fluorescence (CE-LIF) was used to extract and analyze plasma miRNAs. Specifically, miRNAs hybridized with a biotinylated fluorescent DNA probe were isolated from plasma using magnetic beads. These hybridized miRNAs were then directly injected into the CE-LIF system for analysis, eliminating the need for additional processing steps. Both the hybridization and bead-to-probe binding were executed concurrently, regulated by temperature and time. Through the optimization of magnetic bead extraction and CE-LIF conditions, we developed a highly sensitive assay for miR-21 quantification in plasma. The assay displayed remarkable linearity (R2 = 0.9975) within a 0.1–5 pM range and exhibited favorable precision (0.22–1.26 %) and accuracy (98.31–111.19 %). Importantly, we successfully detected endogenous miR-21 in plasma samples from both a lung cancer patient and healthy adults, revealing a 1.7-fold overexpression of miR-21 in lung cancer plasma relative to normal samples. Our findings suggest that this developed system offers a simple and sensitive approach for detecting endogenous miRNAs in plasma, showing its potential utility in disease diagnostics. To our knowledge, this is the first study to utilize CE-LIF for plasma miRNA detection. © 2023 The Authors
- DOI
- 10.1016/j.heliyon.2023.e22809
- Appears in Collections:
- 약학대학 > 약학과 > Journal papers
- Files in This Item:
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1-s2.0-S240584402310017X-main.pdf(1.71 MB)
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