Evaluation of mRNA Localization Using Double Barrel Scanning Ion Conductance Microscopy

Area of Science:

• Cell Biology
• Biophysics
• Molecular Biology

Background:

• Understanding spatial mRNA localization is crucial for deciphering cellular functions within tissues.
• Current methods may lack the resolution or precision for single-cell mRNA distribution analysis.

Purpose of the Study:

• To develop and validate a novel method for evaluating spatial mRNA localization in single cells.
• To demonstrate the capability of scanning ion conductance microscopy (SICM) for this purpose.

Main Methods:

• Utilized a double-barrel nanopipette system for simultaneous SICM imaging and cytosol collection.
• Employed SICM for high-resolution topographic imaging to guide subcellular sampling.
• Collected minute cytosol samples from specific intracellular locations for quantitative polymerase chain reaction (qPCR) analysis.
• Automated pipette movement for high-throughput sample collection and analysis.

Main Results:

• Successfully collected cytosol from living cells using the organic phase barrel of the nanopipette.
• Demonstrated that mRNA expression levels vary depending on the specific intracellular position within a single cell.
• Validated SICM as a tool for precise, minimally invasive subcellular sampling.

Conclusions:

• SICM imaging provides a powerful platform for analyzing mRNA localization at the single-cell level.
• The developed method allows for the assessment of spatial gene expression patterns within individual cells.
• The automated system facilitates high-throughput analysis of mRNA distribution, advancing single-cell research.