Reactive electrophilic species (RES)

Reactive electrophilic species (RES) are electron-deficient molecules that react with nucleophilic sites in cellular macromolecules such as proteins and DNA (Parvez et al., 2018, PubMed). They include endogenous metabolic byproducts like 4-hydroxynonenal (4-HNE) and exogenous compounds like certain reactive drug metabolites (LoPachin and Gavin, 2014, PubMed). RES play a dual role in biology: at low levels, they act as signaling molecules that trigger protective antioxidant responses through the Keap1-Nrf2 pathway (Farmer and Davoine, 2007, Plant Physiology). However, at high levels, they cause electrophilic stress, leading to irreversible damage to proteins and genetic material (Jacob et al., 2012, PubMed). This damage is implicated in various pathologies, including cancer, neurodegeneration, and chronic inflammation. Therapeutic strategies often involve the use of nucleophilic scavengers like N-acetylcysteine to neutralize RES or the activation of endogenous detoxification enzymes to mitigate their harmful effects. In drug development, monitoring RES formation is critical for assessing the safety and potential toxicity of new chemical entities.

Other names

ElectrophilesReactive electrophilesElectrophilic stress agentsElectrophilic metabolites

Nucleophilic scavenging and covalent neutralization of electrophilic intermediates