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Updated: Sep 13, 2025

Field-Deployable Candidatus Liberibacter asiaticus Detection Using Recombinase Polymerase Amplification Combined with CRISPR-Cas12a

Field-Deployable Candidatus Liberibacter asiaticus Detection Using Recombinase Polymerase Amplification Combined with CRISPR-Cas12a

Published on: December 23, 2022

A multifunctional switch for label-free CRISPR/Cas12a sensor with self-driven amplification.

Po Li¹, Xueying Lei², Xiaoying Niu¹

¹Department of Orthopedic and Soft Tissue, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, 450008, China.

Synthetic and Systems Biotechnology

|July 30, 2025

Summary

This summary is machine-generated.

A novel CRISPR/Cas12a biosensing platform offers label-free microRNA (miRNA) detection. This innovative system simplifies diagnostics, enhancing accuracy and selectivity for point-of-care applications.

Keywords:

CRISPR/Cas12a Label-free MicroRNA Molecular switch Toehold

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Area of Science:

Biomolecular Engineering
Molecular Diagnostics
CRISPR Technology

Background:

MicroRNAs (miRNAs) show potential as non-invasive diagnostic biomarkers.
Existing CRISPR/Cas12a miRNA detection methods require complex steps like reverse transcription and pre-amplification, and use costly fluorescent reporters.
These conventional methods can introduce chemical complexity and background noise, limiting their practical application.

Purpose of the Study:

To develop a simplified, label-free CRISPR/Cas12a biosensing system for microRNA detection.
To overcome the limitations of existing methods, including reliance on reverse transcription, pre-amplification, and fluorescent reporters.
To create a multifunctional molecular switch integrating target recognition, CRISPR/Cas12a activation, intrinsic fluorescence, and signal amplification.

Main Methods:

Development of a multifunctional molecular switch for integrated biosensing.
Utilizing the CRISPR/Cas12a system for label-free detection of microRNA.
Demonstration of the system's capability for detecting miR-21.

Main Results:

Achieved label-free CRISPR/Cas12a biosensing for miR-21.
Established a low detection limit of 4.8 nM for miR-21.
Demonstrated robust accuracy, precision, and selectivity in detection.
Validated the potential for application in real samples.

Conclusions:

The developed label-free CRISPR/Cas12a platform offers a simplified approach to miRNA detection.
This innovative biosensing system holds promise for accurate and sensitive point-of-care diagnostics.
The integrated molecular switch design addresses key limitations of current miRNA detection technologies.