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Updated: Jul 14, 2026
07:59
An Optogenetic Method to Control and Analyze Gene Expression Patterns in Cell-to-cell Interactions
Published on: March 22, 2018
Show and tell: visualizing gene expression in living cells
Ilona U Rafalska-Metcalf1, Susan M Janicki
1The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA.
Journal of Cell Science
|July 4, 2007
Summary
Non-invasive imaging of proteins and nucleic acids in living cells reveals gene expression mechanisms. This technique illuminates nuclear organization, transcription factor dynamics, and RNA synthesis kinetics, enhancing our understanding of cellular responses.
Area of Science:
- Molecular Biology
- Cell Biology
- Biophysics
Background:
- Visualizing proteins and nucleic acids in living cells is crucial for understanding cellular processes.
- Non-invasive imaging techniques offer unprecedented insights into molecular dynamics in vivo.
- Current methods allow for the study of gene expression mechanisms and regulatory elements.
Purpose of the Study:
- To highlight recent advancements in imaging techniques for studying gene expression in living cells.
- To showcase how these techniques reveal insights into nuclear organization and molecular dynamics.
- To expand the understanding of chromatin and RNA dynamics in cellular signaling.
Main Methods:
- Labeling endogenous genes for visualization.
- Creating reporter constructs for localizing DNA and RNA regulatory elements.
- Employing non-invasive imaging methods to study live cells.
Main Results:
- Recent studies utilized imaging to investigate nuclear organization and transcription factor dynamics.
- The kinetics of RNA synthesis were analyzed using these advanced imaging techniques.
- New regulatory mechanisms of gene expression were uncovered through live-cell imaging.
Conclusions:
- Imaging gene expression in single living cells reveals novel regulatory mechanisms.
- These techniques deepen our comprehension of chromatin and RNA dynamics in cellular responses.
- Non-invasive visualization is a powerful tool for studying complex biological processes in vivo.
Related Concept Videos
02:11Reporter Genes
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
Commonly used reporter...
Commonly used reporter...
01:58Cell Specific Gene Expression
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
01:58Cell Specific Gene Expression
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
01:42What is Gene Expression?
Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...