Reactive oxygen species, electrophiles, disulfides, metals, and protein thiols

The term 'Reactive oxygen species, electrophiles, disulfides, metals, and protein thiols' refers to a broad category of chemical entities and stressors rather than a single therapeutic target or protein. These species are central to cellular redox signaling and oxidative stress, often acting as triggers for the Keap1-Nrf2-ARE pathway. Reactive oxygen species (ROS) and electrophiles can modify specific cysteine residues on sensor proteins like Keap1, which regulates the cell's antioxidant defense mechanisms. While these molecules are not 'targets' in the traditional sense of a receptor or enzyme, they represent the chemical environment that many drugs aim to modulate. For instance, Nrf2 activators are designed to mimic the electrophilic stress caused by these species to induce protective gene expression, while antioxidants are used to neutralize them to prevent cellular damage in diseases like cancer, neurodegeneration, and chronic inflammation.

Other names

Oxidative stress mediatorsRedox-active speciesElectrophilic stressorsThiol-reactive agents

These species typically act as inducers of the Nrf2 (Nuclear factor erythroid 2-related factor 2) antioxidant response by modifying cysteine sensors on the Keap1 (Kelch-like ECH-associated protein 1) protein, leading to the stabilization and nuclear translocation of Nrf2.