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Updated: Jun 26, 2026
Measurements of Physiological Stress Responses in C. Elegans
Published on: May 21, 2020
Integrating the stress response: lessons for neurodegenerative diseases from C. elegans
Veena Prahlad1, Richard I Morimoto
1Department of Biochemistry, Molecular Biology and Cell Biology, Rice Institute for Biomedical Research, Northwestern University, Evanston, IL 60208, USA.
Abstract:
All cells possess surveillance and homeostatic mechanisms to adjust protein biogenesis to the demands of growth, differentiation, ageing and environmental stress. However, under certain circumstances, these mechanisms fail to adequately respond to proteotoxic imbalances and result in the accumulation of misfolded proteins. In humans, this can lead to neurodegeneration and other protein conformational diseases. To protect itself, the cell employs highly conserved stress responses and chaperone networks to maintain protein-folding homeostasis (proteostasis). Although the regulation of stress responses, such as the heat-shock response, and of proteostasis have been widely considered to be cell autonomous, recent studies using Caenorhabditis elegans have shown that these processes are regulated by neuronal signaling and endocrine pathways and integrated into other functions of the organism. The hierarchical control of the cellular proteostasis machinery affords insight into the organization of stress regulatory networks in multicellular organisms and offers novel targets for the treatment of human protein conformational diseases.
Insights
Cellular protein homeostasis (proteostasis) is crucial for health, but failures can cause disease. New research reveals that proteostasis is regulated by neuronal and endocrine pathways, not just cell-autonomous mechanisms, offering new therapeutic targets.
Area of Science:
- Cellular Biology
- Neuroscience
- Genetics
Background:
- Cells have mechanisms to regulate protein biogenesis and prevent misfolded protein accumulation.
- Failure of these mechanisms can lead to proteotoxic imbalances, causing neurodegeneration and protein conformational diseases in humans.
- Cellular proteostasis is maintained by stress responses and chaperone networks.
Purpose of the Study:
- To investigate the regulation of cellular proteostasis.
- To determine if proteostasis is regulated by cell-autonomous mechanisms or broader organismal pathways.
- To identify novel therapeutic targets for protein conformational diseases.
Main Methods:
- Studies were conducted using Caenorhabditis elegans.
- Neuronal signaling pathways were analyzed.
- Endocrine pathways were investigated.
- Integration of proteostasis with other organismal functions was examined.
Main Results:
- Proteostasis and cellular stress responses are not solely cell-autonomous.
- Neuronal signaling pathways significantly regulate proteostasis.
- Endocrine pathways are integrated into the control of proteostasis.
- These findings provide insight into multicellular stress regulatory networks.
Conclusions:
- Cellular proteostasis is hierarchically controlled and integrated with organismal functions.
- Neuronal and endocrine signaling play key roles in regulating proteostasis.
- Understanding these regulatory networks offers new therapeutic avenues for protein conformational diseases.
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