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Measurements of Physiological Stress Responses in C. Elegans
Published on: May 21, 2020
Complex coordination of multi-scale cellular responses to environmental stress
Luís L Fonseca1, Claudia Sánchez, Helena Santos
1Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, 2780-156 Oeiras, Portugal.
Molecular Biosystems
|November 20, 2010
Summary
Baker's yeast exhibits a dual stress response to heat. An immediate metabolic adjustment acts as a quick fix, while a stronger, pre-organized response develops over time, highlighting gene, protein, and metabolite synergy.
Area of Science:
- Cellular biology
- Systems biology
- Biophysics
Background:
- Organisms face constant environmental stresses requiring effective survival mechanisms.
- Cellular responses involve complex interactions across genes, proteins, and metabolites.
- Understanding stress response dynamics is crucial for predicting organismal survival.
Purpose of the Study:
- To investigate the multi-scale and multi-temporal stress response in baker's yeast.
- To analyze the synergy between gene, protein, and metabolite dynamics under heat stress.
- To quantitatively separate metabolic control and gene regulation responses.
Main Methods:
- In vivo Nuclear Magnetic Resonance (NMR) measurements of metabolic profiles.
- Multi-scale experimental and dynamical modeling analysis.
- Analysis of trehalose accumulation and enzyme activity under heat stress.
Main Results:
- Baker's yeast displays a rapid metabolic response to heat, followed by a more potent, pre-organized response.
- A strong synergy exists between gene, protein, and metabolite dynamics during stress.
- Metabolic and gene regulation responses were quantitatively separated using modeling.
- Observed enzyme activity profiles do not fully explain immediate trehalose accumulation.
Conclusions:
- Cellular stress response is a concerted, multi-level process occurring across different timescales.
- Pre-existing cellular states significantly enhance stress resilience.
- Dynamical modeling combined with metabolic profiling provides deep insights into cellular stress responses.
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