Cellular macromolecules – non-specific oxidative damage

Cellular macromolecules – non-specific oxidative damage refers to the deleterious chemical modification of proteins, lipids, and nucleic acids caused by an imbalance between the production of reactive oxygen species (ROS) and the body's antioxidant defense mechanisms (Halliwell & Gutteridge, 2015). This process, a hallmark of oxidative stress, leads to structural and functional impairments such as DNA mutations, protein misfolding, and membrane degradation (Sies et al., 2017). While not a single molecular target like a receptor or enzyme, it represents a broad pathological state targeted by various antioxidant therapies aimed at neutralizing free radicals or enhancing cellular resilience (Pizzino et al., 2017). Chronic oxidative damage is implicated in the pathogenesis of numerous conditions, including neurodegenerative disorders, cardiovascular diseases, and cancer (Forman & Zhang, 2021). Therapeutic intervention often involves the use of exogenous antioxidants or Nrf2 activators to mitigate the cumulative damage to cellular components (He et al., 2020). However, the clinical utility of targeting this process remains complex due to the dual role of ROS in essential signaling pathways (Schieber & Chandel, 2014).

Other names

Oxidative stressReactive oxygen species-mediated damageROS-induced damageLipid peroxidationProtein carbonylationDNA oxidative damage

Drugs typically act by scavenging reactive oxygen species (ROS), chelating transition metals that catalyze radical formation, or upregulating endogenous antioxidant defenses to prevent the chemical modification of lipids, proteins, and nucleic acids.