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Nox proteins in signal transduction
David I Brown1, Kathy K Griendling
1Department of Medicine, Division of Cardiology, Emory University, 1639 Pierce Drive, 319 WMB Atlanta, GA 30322, USA.
Free Radical Biology & Medicine
|July 25, 2009
Summary
NADPH oxidase (Nox) proteins generate reactive oxygen species (ROS) crucial for cell signaling. This review covers Nox protein roles in various tissues and their impact on cellular processes.
Area of Science:
- Biochemistry
- Cell Biology
- Physiology
Background:
- NADPH oxidase (Nox) proteins are key producers of reactive oxygen species (ROS) like superoxide and hydrogen peroxide.
- ROS generated by Nox proteins are vital signaling molecules in numerous physiological processes.
- Dysregulation of Nox-derived ROS is linked to various pathologies.
Purpose of the Study:
- To review recent literature on NADPH oxidase (Nox) protein family.
- To discuss Nox protein tissue distribution, subcellular localization, and activation.
- To elucidate the signal transduction mechanisms regulated by Nox-derived ROS.
Main Methods:
- Literature review of recent studies on Nox proteins.
- Analysis of data on Nox protein expression and function across different tissues.
- Synthesis of information on Nox activation and downstream signaling pathways.
Main Results:
- Nox proteins (Nox1-5, Duox1/2) are essential for signaling in the brain, immune system, vasculature, and digestive tract.
- Nox-derived ROS regulate critical cellular functions including cytoskeletal remodeling, gene expression, proliferation, differentiation, migration, and cell death.
- These ROS-mediated processes are tightly controlled and reversible.
Conclusions:
- NADPH oxidase (Nox) proteins are integral to cellular signaling pathways.
- Understanding Nox protein function is crucial for comprehending normal physiology and disease pathogenesis.
- Further research into Nox biology will uncover new therapeutic targets.
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