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Regulation of cell cycle re-entry by growth, survival and stress signalling pathways
S J Cook1, K Balmanno, A Garner
1Inositide Laboratory, Signalling Programme, The Babraham Institute, Cambridge, UK.
Abstract:
The mitogen-activated and stress-activated protein kinases transduce signals from plasma membrane signalling machinery into the nucleus to modulate gene expression. By regulating the genomic response to environmental cues (growth factors, stresses) these pathways determine whether a cell re-enters the cell cycle, undergoes cell cycle arrest, senescence or apoptosis. We are particularly interested in how these pathways integrate with each other, and interact with the cell cycle machinery to achieve these discrete biological responses.
Insights
Mitogen-activated and stress-activated protein kinases control gene expression and cell fate by integrating signals. Understanding their interaction with cell cycle machinery is key to cell cycle regulation.
Area of Science:
- Cellular signaling pathways
- Molecular biology
- Gene expression regulation
Background:
- Mitogen-activated and stress-activated protein kinases (MAPKs) are crucial signal transducers.
- These kinases relay information from the cell surface to the nucleus, impacting gene expression.
- Cellular responses to environmental cues like growth factors and stresses are mediated by these pathways.
Purpose of the Study:
- To investigate the integration of mitogen-activated and stress-activated protein kinase pathways.
- To explore the interaction between these kinase pathways and the cell cycle machinery.
- To elucidate how these signaling networks determine distinct cellular outcomes such as cell cycle progression, arrest, senescence, or apoptosis.
Main Methods:
- Investigating signal transduction mechanisms.
- Analyzing gene expression modulation.
- Studying cell cycle regulation.
- Examining pathway integration and cross-talk.
Main Results:
- MAPK pathways integrate extracellular signals to regulate nuclear events.
- These pathways dictate cell fate decisions, including proliferation, arrest, senescence, and apoptosis.
- Complex interactions exist between MAPK pathways and cell cycle control elements.
Conclusions:
- MAPK signaling is central to cellular responses to environmental stimuli.
- The interplay between MAPK pathways and cell cycle machinery governs fundamental cell behaviors.
- Further research into these integrated pathways can reveal novel therapeutic targets for diseases involving aberrant cell proliferation or death.