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Updated: Jun 20, 2026
10:01
Probing mRNA Kinetics in Space and Time in Escherichia coli using Two-Color Single-Molecule Fluorescence In Situ Hybridization
Published on: July 30, 2020
Selective probing of mRNA expression levels within a living cell
Applied Physics Letters
|September 25, 2009
Summary
This study introduces a new method for measuring messenger ribonucleic acid (mRNA) levels in living cells using an atomic force microscope. The technique allows for rapid, selective, and non-damaging analysis of both high and low mRNA copy numbers.
Area of Science:
- Biophysics
- Molecular Biology
- Nanotechnology
Background:
- Accurate measurement of messenger ribonucleic acid (mRNA) expression is crucial for understanding cellular function.
- Existing methods for mRNA analysis can be time-consuming, destructive, or lack sensitivity for low copy numbers.
Purpose of the Study:
- To develop a selective and nondestructive method for measuring mRNA expression levels in living cells.
- To enable rapid quantification of both high and extremely low mRNA copy numbers.
Main Methods:
- Modification of an atomic force microscope tip into a tapered nanoscale coaxial cable.
- Application of an alternating potential to generate a dielectrophoretic force.
- Use of gene-specific primers on the tip for selective mRNA attraction and analysis.
Main Results:
- Selective and nondestructive measurement of mRNA expression levels achieved in living cells.
- Successful analysis of both high (approx. 2500) and extremely low (11) copy number mRNA.
- Measurement completed in under 10 seconds.
Conclusions:
- The developed technique offers a rapid, sensitive, and non-destructive approach for single-cell mRNA analysis.
- This method has potential applications in various fields, including diagnostics and drug discovery.
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