The influence of reactive oxygen species on cell cycle progression in mammalian cells

Area of Science:

• Cell Biology
• Biochemistry

Background:

• Cell cycle progression is tightly regulated by cyclins and cyclin-dependent kinases (CDKs).
• Reactive oxygen species (ROS) have emerged as crucial signaling molecules influencing cellular processes.
• The role of ROS in cell cycle regulation is increasingly recognized.

Purpose of the Study:

• To review the discovery and function of NADPH oxidase (NOX) complexes in ROS production.
• To elucidate the mechanisms by which ROS influence cell cycle progression.
• To integrate the roles of phosphorylation, ubiquitination, and receptor activation in ROS-mediated cell cycle control.

Main Methods:

• Review of existing literature on ROS, NOX complexes, and cell cycle regulation.
• Analysis of signaling pathways involving phosphorylation and ubiquitination.
• Development of a model illustrating ROS involvement in EGF-receptor-mediated cell cycle regulation.

Main Results:

• ROS, produced by NOX complexes, are essential regulators of cell cycle progression.
• ROS modulate CDK activity and cell cycle regulators via phosphorylation and ubiquitination.
• Phosphorylation is identified as the predominant regulatory mechanism influenced by ROS, often preceding ubiquitination.
• ROS can activate growth factor receptors, such as the EGF receptor, impacting cell cycle control.

Conclusions:

• ROS are significant mediators of cell cycle regulation, acting through diverse signaling pathways.
• Understanding ROS signaling is critical for comprehending cell cycle control.
• The interplay between ROS, phosphorylation, ubiquitination, and receptor activation provides a comprehensive view of cell cycle regulation.