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Measuring the Kinetics of mRNA Transcription in Single Living Cells

Measuring the Kinetics of mRNA Transcription in Single Living Cells

Published on: August 25, 2011

Seeing is believing: visualizing transcriptional dynamics in single cells.

Alyshia Newhart¹, Susan M Janicki

¹Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, Pennsylvania.

Journal of Cellular Physiology

|August 10, 2013

Summary

Researchers developed a gene-specific imaging method to visualize transcription dynamics in living cells. This technique allows for high-resolution, quantitative analysis of gene regulation and molecular machine coordination within the nucleus.

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Measuring the Kinetics of mRNA Transcription in Single Living Cells

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Area of Science:

Molecular Biology
Cell Biology
Genetics

Background:

Gene expression requires coordinated molecular machine function at transcription sites.
Understanding nuclear organization's role in transcription necessitates visualizing dynamic interactions.
Current methods allow localization of individual transcription sites in single living cells.

Purpose of the Study:

To develop a gene-specific imaging strategy for visualizing transcriptional dynamics in vivo.
To obtain high-resolution quantitative information about gene regulation.
To reveal regulatory mechanisms difficult to study outside of single living cells.

Main Methods:

Engineering reporter gene constructs with sequence elements for nucleic acid visualization in vivo.
Stable integration of transgenes forming chromatinized arrays.
Imaging these arrays during activation to study transcriptional dynamics.
Utilizing computational modeling to generate testable hypotheses.

Main Results:

The developed strategy enables visualization of dynamic interactions of regulatory factors with chromatin and RNA.
High-resolution quantitative data on transcriptional dynamics can be obtained.
The system allows for testing hypotheses generated by modeling.

Conclusions:

This gene-specific imaging strategy provides a powerful tool for studying nuclear organization and gene regulation.
It offers unique insights into molecular mechanisms at the single-cell level.
The approach has the potential to uncover novel regulatory mechanisms in living cells.