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Updated: Jul 7, 2025
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Measurements of Physiological Stress Responses in C. Elegans
Published on: May 21, 2020
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Signaling plasticity in the integrated stress response
Morgane Boone1, Francesca Zappa1
1Bay Area Institute of Science, Altos Labs, Redwood City, CA, United States.
Frontiers in Cell and Developmental Biology
|December 25, 2023
Summary
The Integrated Stress Response (ISR) is a cellular network that controls protein synthesis under stress. It involves sensor kinases and eIF2 phosphorylation, impacting cell health and gene expression.
Area of Science:
- Cellular Biology
- Molecular Signaling
- Biochemistry
Background:
- The Integrated Stress Response (ISR) is a crucial cellular pathway for maintaining homeostasis.
- It regulates protein synthesis in response to various environmental and cellular stressors.
- The ISR involves a network of sensor kinases that converge on the eukaryotic initiation factor 2 (eIF2).
Purpose of the Study:
- To provide updated insights into the mechanisms of ISR sensor kinases.
- To explore the role of subcellular localization in ISR signaling.
- To highlight variations in ISR signaling across different cell and tissue types.
Main Methods:
- Review of current literature on ISR signaling pathways.
- Analysis of molecular mechanisms of ISR sensor kinases.
- Comparative analysis of ISR signaling in diverse cellular contexts.
Main Results:
- ISR sensor kinases detect multiple stressors and phosphorylate eIF2.
- This phosphorylation leads to repression of general protein synthesis and preferential translation of specific transcripts.
- ISR signaling is dynamic, with modulators and feedback loops that differ across cell types.
Conclusions:
- The ISR is a complex and adaptable network critical for cell survival.
- Understanding ISR mechanisms, localization, and cell-specific differences is key to comprehending cell health.
- Crosstalk between ISR and other signaling pathways significantly influences cellular responses to stress.
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