Reactive oxygen species and inflammatory mediators

Reactive oxygen species (ROS) and inflammatory mediators are a broad category of molecules that play dual roles as essential signaling components and mediators of tissue damage. ROS, such as superoxide and hydrogen peroxide, are chemically reactive oxygen-containing molecules produced during mitochondrial respiration and by specialized enzymes like NADPH oxidase (NIH, 2022). Inflammatory mediators include a diverse set of molecules such as cytokines (e.g., TNF-alpha, IL-1), chemokines, and lipid mediators like prostaglandins and leukotrienes, which coordinate the body's immune response to stimuli (StatPearls, 2023). While these molecules are vital for normal physiological processes like cell signaling and pathogen defense, their chronic or excessive production leads to oxidative stress and persistent inflammation, which are central to the progression of diseases such as atherosclerosis, diabetes, and various cancers (PubMed, PMID: 23953804). Therapeutic strategies targeting this group include the use of antioxidants to neutralize ROS and anti-inflammatory drugs, such as NSAIDs or biologics, to inhibit the production or activity of specific inflammatory mediators (PubChem). However, because these molecules also perform critical homeostatic functions, broad inhibition can lead to significant safety concerns, including impaired wound healing and increased susceptibility to infection (NIH, 2023).

Other names

Reactive oxygen speciesInflammatory mediatorsOxidative stress and inflammation markersPro-inflammatory mediatorsROS and inflammatory cytokines

Drugs targeting this group act by scavenging reactive species, inhibiting biosynthetic enzymes such as cyclooxygenases, or blocking the receptors of specific inflammatory cytokines.