[Reactive oxygen and nitrogen species].

Area of Science:

• Biochemistry
• Cell Biology
• Physiology

Context:

• Reactive oxygen species (ROS) and reactive nitrogen species (RNS) are integral to aerobic metabolism.
• Their overproduction leads to oxidative and nitrosative stress, implicated in numerous diseases.
• Nitric oxide (NO) contributes to ROS generation and modulates inflammatory responses.

Purpose:

• To consolidate key information on the generation and function of ROS and RNS.
• To elucidate the mechanisms by which ROS and RNS impact cellular processes.
• To highlight the link between ROS/RNS, oxidative stress, nitrosative stress, and disease pathogenesis.

Summary:

• ROS are byproducts of aerobic metabolism, while RNS, including nitric oxide (NO), are also critical signaling molecules.
• Both ROS and RNS can impair protein function through oxidation and nitrosylation, potentially inducing apoptosis.
• NO interacts with molecular oxygen and other species to generate ROS, influencing inflammatory pathways via cyclooxygenases.

Impact:

• Provides a foundational understanding of ROS and RNS in normal physiology and disease.
• Highlights the critical role of redox balance in cellular health.
• Serves as a reference for researchers investigating oxidative and nitrosative stress-related conditions.