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Related Experiment Video

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NF-κB-dependent Luciferase Activation and Quantification of Gene Expression in Salmonella Infected Tissue Culture Cells

NF-κB-dependent Luciferase Activation and Quantification of Gene Expression in Salmonella Infected Tissue Culture Cells

Published on: January 12, 2020

Cracking the NF-κB code.

Karen E Tkach¹, Jennifer E Oyler, Grégoire Altan-Bonnet

¹ImmunoDynamics Group, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.

Science Signaling

|February 20, 2014

Summary

This summary is machine-generated.

Positive feedback in nuclear factor κB (NF-κB) signaling helps macrophages adjust their antimicrobial defenses based on pathogen cues. This research reveals integrated signaling and gene expression dynamics for cellular regulation.

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Area of Science:

Cellular Biology
Systems Biology
Immunology

Background:

Cellular regulation involves complex interactions between signaling pathways and gene expression.
Quantitative models are increasingly important for understanding these regulatory mechanisms.
Nuclear factor κB (NF-κB) signaling plays a critical role in immune responses.

Purpose of the Study:

To investigate the role of positive feedback in NF-κB signaling on macrophage antimicrobial responses.
To analyze cell-to-cell variability and computational modeling to understand signaling and transcriptional dynamics.
To challenge the traditional view of distinct fast signaling and slow gene expression phases.

Main Methods:

Analysis of cell-to-cell variability in macrophage responses.
Computational modeling of signaling and transcriptional time integration.
Studying positive feedback loops downstream of NF-κB signaling.

Main Results:

Positive feedback downstream of NF-κB signaling enhances macrophage capacity to scale antimicrobial responses.
The study demonstrated how macrophages adjust their response based on the dose of pathogen-associated molecular cues.
Integration of signaling and transcriptional responses occurs over longer timescales than previously assumed.

Conclusions:

Quantitative modeling and analysis of cell variability provide insights into cellular regulation.
Positive feedback mechanisms are crucial for adaptive immune responses.
The findings advance our understanding of biological regulation across extended time scales.