Abstract
MicroRNAs (miRNAs) serve a crucial role in numerous biological processes, such as acute pancreatitis development. Due to its low abundance and high similarity among homogeneous family members, sensitive and reliable detection of microRNA remains a formidable challenge. By combining the three-way junction-assisted rolling circle amplification (RCA) with the trans-cleavage of Cas12a, we propose a novel fluorescent technique for sensitive miRNA detection. In order to increase the amplification efficiency of RCA-based methods, catalytic hairpin amplification (CHA) is incorporated into the RCA process, playing the roles of specific target recognition and three-way junction formation. Consequently, the method demonstrated a six-orders-of-magnitude detection range and a LOD as low as 27 aM, making it a promising method for the early diagnosis of various diseases.
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Acknowledgements
We appreciate the financial support from the Chongqing Medical University. We also thank the director of central laboratory for providing essential equipment.
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Shuqi Zhao designed and wrote the manuscript; Zhiquan Wu performed experiments and analyzed obtained data.
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Wu, Z., Zhao, S. Three-Way Junction-Assisted Rolling Circle Amplification Integrated with trans-Cleavage of Cas12a for Sensitive and Reliable Detection of miRNA. Appl Biochem Biotechnol 196, 3115–3125 (2024). https://doi.org/10.1007/s12010-023-04691-8
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DOI: https://doi.org/10.1007/s12010-023-04691-8