Detecting RNA base methylations in single cells by in situ hybridization

Area of Science:

• Molecular Biology
• Microbiology
• Genetics

Background:

• RNA methylation plays a crucial role in cellular functions like protein synthesis and gene expression.
• Current bulk detection methods average methylation states across millions of cells, masking single-cell variations.
• Specific methylations (m62A, m1G, m3U) impact RNA stability and function.

Purpose of the Study:

• To develop a single-cell method for detecting specific RNA methylations.
• To enable the quantification of antibiotic-resistant bacteria at the single-cell level.
• To visualize and analyze multiple RNA methylations simultaneously within individual cells.

Main Methods:

• Development of methylation-sensitive RNA fluorescence in situ hybridization (msRNA-FISH).
• Utilizes Molecular Beacons for in situ hybridization.
• Employs multicolor fluorescence imaging for simultaneous detection.

Main Results:

• Successfully detected single RNA methylations in individual cells.
• Quantified mixtures of antibiotic-resistant bacteria with high accuracy.
• Demonstrated simultaneous detection of multiple methylations (m62A, m1G, m3U) in single cells.

Conclusions:

• The msRNA-FISH method provides unprecedented single-cell resolution for RNA methylation analysis.
• This technique offers a powerful tool for studying bacterial populations and cellular regulation.
• Enables deeper understanding of the biological roles of RNA modifications.