Quantitative detection of 2'-O-methylated residues in non-coding RNAs using DNAzymes and quantitative RT-PCR

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• Post-transcriptional RNA modifications are crucial for cellular regulation.
• Advanced sequencing technologies detect RNA modifications but yield false positives.
• Need for complementary methods for RNA modification validation and quantification.

Purpose of the Study:

• To optimize a DNAzyme-based protocol for validating 2 -O-methylations.
• To demonstrate the sensitivity and specificity of the DAMP-RNA method.
• To provide a robust tool for investigating RNA modification dynamics.

Main Methods:

• Utilized RNA-cleaving deoxyribozymes (DNAzymes) for targeted RNA cleavage.
• Applied DAMP-RNA (DNAzyme-Assisted Methylation Profiling of RNA) protocol.
• Combined DNAzyme cleavage with RT-qPCR for sensitive detection and quantification.

Main Results:

• Successfully validated 2 -O-methylations in human U1 and U2 snRNAs.
• Demonstrated sensitivity and specificity using siRNA and antisense oligonucleotides.
• Showcased DAMP-RNA's ability to detect variations in 2 -O-methylation levels.

Conclusions:

• DAMP-RNA offers a robust and efficient method for investigating known 2 -O-methylation in any RNA.
• Enhances clarity and reproducibility in epitranscriptomics research.
• Facilitates further exploration of RNA modification dynamics in RNA biology.