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Updated: Feb 14, 2026

Applying an Inducible Expression System to Study Interference of Bacterial Virulence Factors with Intracellular Signaling
Published on: June 25, 2015
Entangled signal pathways can both control expression stability and induce stochastic focusing
Haohua Wang1, Peijiang Liu2, Qingqing Li3
1Department of Mathematics College of Information Science and Technology, Hainan University, Haikou, China.
Researchers explored how interacting signal pathways affect gene transcription. They found that pathway cross-talk strength (CTS) influences mRNA stability and energy use, revealing a trade-off between expression stability and energy dissipation.
Area of Science:
- Molecular Biology
- Systems Biology
- Biophysics
Background:
- Gene transcription is regulated by complex, interacting signaling pathways.
- Understanding the precise impact of pathway cross-talk on gene expression dynamics remains a challenge.
Discussion:
- This study refines a mechanistic model using murine embryonic stem cell data to analyze pathway-pathway cross-talk strength (CTS).
- The research investigates how CTS influences mRNA expression stability and free energy consumption.
- Findings reveal that CTS can be tuned to modulate expression stability, with an optimal CTS balancing stability and energy expenditure.
Key Insights:
- Cross-talk strength (CTS) between signaling pathways can tune mRNA expression stability.
- An optimal CTS maximizes expression pattern stability but also leads to the highest free energy consumption.
- Pathway cross-talk induces stochastic focusing of mRNA levels at the expense of energy.
Outlook:
- The identified cross-talk-mediated trade-off highlights a fundamental principle in cellular regulation.
- Entangled signaling pathways offer a mechanism for controlling both expression stability and energy dissipation.
- Further research can explore the implications of this trade-off in various biological contexts and disease states.
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