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Reactive oxygen species and development in microbial eukaryotes
Jesús Aguirre1, Mauricio Ríos-Momberg, David Hewitt
1Departamento de Genética Molecular, Instituto de Fisiología Celular-UNAM, Apartado Postal 70-242, 04510 México, D.F., México. jaguirre@ifc.unam.mx
Trends in Microbiology
|March 2, 2005
Summary
Reactive oxygen species (ROS), once thought harmful, are now known to regulate cell differentiation in eukaryotes. This strategy, involving enzymes like NADPH oxidases (NOX), was likely selected early in evolution.
Area of Science:
- Biochemistry
- Cell Biology
- Evolutionary Biology
Background:
- Reactive oxygen species (ROS) were traditionally viewed as detrimental byproducts of metabolism.
- Emerging research indicates ROS have crucial physiological functions.
- Understanding ROS production and sensing pathways across diverse organisms is essential.
Purpose of the Study:
- To investigate the roles of ROS in microbial eukaryotes.
- To explore the mechanisms of ROS production and signaling in these organisms.
- To determine the evolutionary origins of ROS-mediated cellular regulation.
Main Methods:
- Analysis of recent data on ROS levels during cell differentiation in microbial eukaryotes.
- Identification and characterization of ROS-producing enzymes, specifically NADPH oxidases (NOX).
- Investigation of NOX involvement in developmental processes and conserved signal-transduction pathways.
Main Results:
- ROS levels increase during cell differentiation in microbial eukaryotes.
- NADPH oxidases (NOX) are confirmed ROS-producing enzymes.
- NOX are implicated in developmental processes, with conserved signaling mechanisms for ROS detection.
Conclusions:
- ROS are actively manipulated to regulate cell differentiation across eukaryotes.
- This regulatory strategy is widespread and suggests early evolutionary selection.
- ROS signaling is a fundamental biological process with deep evolutionary roots.