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Updated: Aug 5, 2026
Dot Blot Assay for Detecting Global N6-Methyladenosine RNA Modification Levels
Published on: February 6, 2026
Amplification-free detection of N6-Methyladenosine (m6A) based on droplet digital CRISPR-Cas13a
Chenfei Zhao1, Xiao Liu1, Ruiyang Sun1
1School of Life Sciences, Jilin University, Changchun, Jilin, 130012, China.
Abstract:
m6A (N6-methyladenosine), a prevalent RNA modification in eukaryotic mRNA involved in multiple biological processes, enables early cancer screening via its detection. m6A methylation detection is considered challenging, with most existing methods being limited by complex chemical transformations that incur high cost and procedural complexity. To overcome these challenges, a novel droplet-based digital CRISPR-Cas13a (Dd-Cas13a) approach was developed for the detection of m6A modifications in RNA. The method employs an m6A-specific antibody enrichment strategy to selectively enrich RNA molecules harboring m6A modifications, while RNA molecules lacking m6A remain unselected. Integration of the targeted recognition capability of the CRISPR/Cas13a system with droplet technology enables amplification-free detection of m6A-modified RNA at fM concentrations, with a significant improvement in sensitivity. The Dd-Cas13a detection platform enables visualization and quantitative analysis of methylation site proportions in cellular RNA, providing a novel approach for rapid and sensitive detection of RNA methylation, with significant potential for applications in early disease diagnosis and therapeutic efficacy assessment.
Insights
A new droplet-based digital CRISPR-Cas13a method simplifies N6-methyladenosine (m6A) RNA detection. This approach enhances sensitivity for early cancer screening and disease diagnosis.
Area of Science:
- Biochemistry
- Molecular Biology
- Genomics
Background:
- N6-methyladenosine (m6A) is a key RNA modification regulating biological processes.
- Detecting m6A methylation is challenging due to complex and costly existing methods.
- Sensitive m6A detection is crucial for early cancer screening and disease diagnosis.
Purpose of the Study:
- To develop a novel, sensitive, and cost-effective method for detecting m6A modifications in RNA.
- To overcome the limitations of current m6A detection techniques.
- To enable quantitative analysis of m6A methylation sites in cellular RNA.
Main Methods:
- Development of a droplet-based digital CRISPR-Cas13a (Dd-Cas13a) detection platform.
- Utilizing an m6A-specific antibody for selective enrichment of m6A-modified RNA.
- Integration of CRISPR/Cas13a system with droplet technology for amplification-free detection.
Main Results:
- Achieved amplification-free detection of m6A-modified RNA at femtomolar (fM) concentrations.
- Demonstrated significant improvement in detection sensitivity compared to existing methods.
- Enabled visualization and quantitative analysis of m6A methylation site proportions in cellular RNA.
Conclusions:
- The Dd-Cas13a platform offers a rapid and highly sensitive approach for RNA methylation detection.
- This novel method holds significant potential for early disease diagnosis and therapeutic efficacy assessment.
- The Dd-Cas13a system provides a valuable tool for studying m6A modifications in biological research.
