p53-dependent signal transduction induced by stress
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Updated: Oct 31, 2026

Measurements of Physiological Stress Responses in C. Elegans
Published on: May 21, 2020
Abstract:
While recent advances in elucidating the enzyme/substrate relationship of phosphorylation cascades have demonstrated several distinct pathways in membrane-cytoplasm signaling, the molecular dissection of p53 and the products of other proto-oncogenes have greatly promoted the studies of nuclear signaling and expanded the checkpoint concept to mammalian cells. The growing list of p53-activating factors ranges from genotoxic agents to non-genotoxic stresses. The diverse involvement of p53 and its close linkage to other nuclear and extranuclear signaling networks force us to reconsider the concept of cellular stress response. A signaling network emerges from crosstalks between different types of stress in the same signaling pathway and crosstalks between different pathways in response to the same stress. We review the present knowledge on cellular stress signaling with emphasis on the crosstalks between different pathways and the molecules which mediate these crosstalks and offer our concept of signaling checkpoints. The importance of stress signaling checkpoints in cancer evolution and cancer therapy is also discussed.
Insights
Cellular stress response involves complex signaling networks with crosstalks between pathways. This review introduces signaling checkpoints, crucial for understanding cancer evolution and therapy.
Area of Science:
- Molecular Biology
- Cellular Signaling
- Cancer Research
Background:
- Advances in phosphorylation cascades and p53 research have illuminated nuclear signaling pathways.
- The p53 protein and proto-oncogenes are key regulators of cellular responses to stress.
- The concept of cellular stress response needs reevaluation due to interconnected signaling networks.
Purpose of the Study:
- To review current knowledge on cellular stress signaling pathways.
- To emphasize the crosstalks between different signaling pathways in response to stress.
- To introduce the concept of signaling checkpoints and their role in cancer.
Main Methods:
- Literature review of molecular signaling pathways.
- Analysis of crosstalks between various cellular stress responses.
- Conceptual framework development for signaling checkpoints.
Main Results:
- Identification of diverse p53-activating factors, including genotoxic and non-genotoxic stresses.
- Elucidation of signaling networks arising from pathway crosstalks.
- Proposed concept of signaling checkpoints mediating stress responses.
Conclusions:
- Cellular stress response is a complex network with significant pathway crosstalks.
- Signaling checkpoints are critical for understanding cancer development and treatment.
- Further research into these networks can inform novel therapeutic strategies.
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