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Published on: October 11, 2012
Apoptosis: a product of programmed and unprogrammed cell death
1Department of Pharmacology and Toxicology, Dartmouth Medical School, Hanover, New Hampshire 03755-3835.
Abstract:
Apoptosis is a form of cell death defined by morphological and biochemical characteristics. Although originally described in 1972, it is only very recently that significant interest in the subject has occurred, possibly as a result of the identification of genes that may either positively or negatively regulate the process. With the rapid expansion of knowledge, it has become apparent that there are multiple pathways that induce apoptosis; some of these may represent programmed events but others are clearly unprogrammed. To clarify the terminology used, it is recommended that apoptosis be used as originally defined to refer only to the end product of these pathways. Furthermore, the realization that a cell can die by multiple pathways suggests caution when translating experimental results. Many potential intermediates may be identified but they may represent components of different pathways. Concern for the use of various inhibitors of apoptosis is also presented. Future directions will be aimed at the definitive identification of the signal mechanisms regulating apoptotic cell death.
Insights
Apoptosis, a programmed cell death, is regulated by multiple pathways. Researchers recommend standardizing apoptosis terminology and cautioning against interpreting intermediates as universally applicable to all cell death pathways.
Area of Science:
- Cell Biology
- Biochemistry
Background:
- Apoptosis, or programmed cell death, is characterized by distinct morphological and biochemical features.
- Recent interest in apoptosis stems from the identification of regulatory genes.
- Multiple pathways, both programmed and unprogrammed, can induce apoptosis.
Purpose of the Study:
- To clarify the terminology surrounding apoptosis.
- To highlight the complexity of cell death pathways.
- To address the use of apoptosis inhibitors.
Main Methods:
- Review of existing literature on apoptosis.
- Analysis of gene regulation in cell death.
- Examination of signaling mechanisms in apoptosis.
Main Results:
- Multiple distinct pathways can lead to apoptosis.
- Interpreting experimental results requires caution due to pathway diversity.
- The use of apoptosis inhibitors warrants careful consideration.
Conclusions:
- Standardized terminology for apoptosis is recommended.
- Understanding diverse cell death pathways is crucial for accurate research.
- Further research is needed to identify definitive regulatory mechanisms of apoptotic cell death.
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