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Signal transduction pathways in apoptosis
1Department of Cell Biology, University of Texas MD Anderson Cancer Center, Houston 77030, USA.
Abstract:
Emerging evidence indicates that apoptosis is regulated by some of the same signal transduction pathways previously implicated in other physiological cellular responses, including alterations in intracellular Ca2+ compartmentalization, activation of protein kinases and phosphatases, alteratios in pH and oxidative stress. Interestingly, signals that promote apoptosis in one model can suppress cell death in another, indicating that cellular responses are determined by the intrinsic programming of the cell in question. This review will summarize current knowledge of the signal transduction pathways regulating apoptosis and discuss how they may be coupled to components of the molecular machinery for cell death.
Insights
Apoptosis, or programmed cell death, is controlled by cell signaling pathways. The specific cellular response depends on the cell's intrinsic programming, influencing how these signals regulate cell death.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Apoptosis regulation involves signal transduction pathways common to other cellular processes.
- Intracellular calcium (Ca2+) dynamics, protein kinase/phosphatase activity, pH, and oxidative stress are key regulators.
- Cellular context dictates whether signals promote or suppress apoptosis.
Purpose of the Study:
- To review current knowledge on signal transduction pathways governing apoptosis.
- To explore the coupling of these pathways to the cell death machinery.
Main Methods:
- Literature review of emerging evidence on apoptosis regulation.
- Analysis of signal transduction pathways involved in cellular responses.
- Discussion of molecular mechanisms linking signaling to cell death.
Main Results:
- Signal transduction pathways play a dual role in regulating cell death.
- Cell-specific programming determines the outcome of apoptotic signaling.
- Common pathways link diverse cellular responses, including apoptosis.
Conclusions:
- Signal transduction pathways are critical regulators of apoptosis.
- Understanding cell-specific responses is key to deciphering apoptosis.
- Further research is needed to elucidate the precise coupling mechanisms.