Carbonyl group

Carbonyl groups (C=O) are chemical functional groups consisting of a carbon atom double-bonded to an oxygen atom, found in aldehydes, ketones, and carboxylic acids. In a therapeutic context, the term refers to 'Reactive Carbonyl Species' (RCS) or 'protein carbonyls,' which are products of oxidative stress and non-enzymatic glycation (Dalle-Donne et al., 2003, PubMed: 12765468). RCS such as methylglyoxal and malondialdehyde are highly reactive and can modify proteins, lipids, and DNA, leading to the formation of advanced glycation end-products (AGEs) and advanced lipoxidation end-products (ALEs). These modifications are central to the pathogenesis of chronic conditions, including diabetic complications, atherosclerosis, and neurodegenerative disorders like Alzheimer's disease (Negre-Salvayre et al., 2008, British Journal of Pharmacology). Although not a specific protein target like a receptor or enzyme, carbonyl groups are targeted by 'carbonyl scavengers'—small molecules designed to chemically sequester these reactive species before they cause irreversible damage (Mecocci et al., 1999, Free Radical Biology and Medicine). Clinical interest in these groups primarily focuses on their role as biomarkers for oxidative damage and as a strategy for mitigating the 'carbonyl stress' associated with aging and metabolic disease.

Other names

C=O groupCarbonyl moietyReactive Carbonyl SpeciesProtein carbonylsRCS

Nucleophilic scavenging and sequestration of reactive carbonyl species (RCS) to prevent the formation of advanced glycation end-products (AGEs) and protein cross-linking (Negre-Salvayre et al., 2008).