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Strategies for Tracking Anastasis, A Cell Survival Phenomenon that Reverses Apoptosis
Published on: February 16, 2015
Trypanosomatid apoptosis: 'Apoptosis' without the canonical regulators
Despina Smirlis1, Ketty Soteriadou
1Laboratory of Molecular Parasitology, Department of Microbiology, Hellenic Pasteur Institute, Athens, Greece. penny@pasteur.gr
Virulence
|May 14, 2011
Summary
Investigating programmed cell death in primitive eukaryotes like trypanosomatids reveals ancestral apoptosis mechanisms. Understanding these ancient cell death processes is key to the evolution of apoptosis.
Area of Science:
- Evolutionary Biology
- Cell Biology
- Protozoology
Background:
- Apoptosis, or programmed cell death, is crucial for multicellular organism development.
- Evidence suggests similar cell death pathways exist in unicellular eukaryotes, including trypanosomatids (e.g., Trypanosoma, Leishmania).
- These protozoa represent some of Earth's earliest eukaryotes, making them vital for studying apoptosis origins.
Purpose of the Study:
- To investigate the ancestral regulators and executors of apoptosis in trypanosomatids.
- To understand the evolutionary history of apoptosis-regulating processes.
- To explore how trypanosomatid apoptosis informs gaps in our knowledge about the origin of apoptosis.
Main Methods:
- Review of existing experimental evidence on trypanosomatid apoptosis.
- Comparative analysis of apoptotic features in trypanosomatids and metazoans.
- Discussion of molecular mediators involved in cell death pathways.
Main Results:
- Trypanosomatids exhibit morphological features of apoptosis similar to metazoan cells.
- These protozoa lack many canonical apoptosis mediators (e.g., Bcl-2 family, caspases).
- This suggests an ancient, potentially distinct, form of apoptosis regulation.
Conclusions:
- Studying trypanosomatid apoptosis offers insights into the evolutionary origins of cell death.
- Classifying these ancestral death programs is essential for understanding complex death pathways in multicellular organisms.
- Further research is needed to elucidate the complete picture of apoptosis evolution.
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