Cellular biomolecules – non-specific oxidative damage

Cellular biomolecules – non-specific oxidative damage refers to the cumulative chemical degradation of essential cellular components, including DNA, proteins, and lipids, by reactive oxygen species (ROS) and reactive nitrogen species (RNS) (Pizzino et al., 2017, Oxidative Medicine and Cellular Longevity). This phenomenon occurs when the balance between ROS production and endogenous antioxidant defenses is disrupted, leading to a state of oxidative stress (Sies, 2015, Redox Biology). DNA damage often manifests as base modifications like 8-OHdG, which can lead to mutagenesis, while lipid peroxidation compromises cell membrane fluidity and integrity (Halliwell & Gutteridge, 2015, Free Radicals in Biology and Medicine). In proteins, oxidative damage typically results in carbonylation or the loss of thiol groups, which impairs enzymatic activity and structural stability. This broad-spectrum damage is implicated in the pathogenesis of numerous conditions, including Alzheimer's disease, atherosclerosis, and chronic inflammation (NIH, 2022, National Institute on Aging). While drugs like Edaravone or N-acetylcysteine aim to mitigate these effects by scavenging radicals, the non-specific nature of the damage makes it a difficult therapeutic target for precision medicine, as ROS also play vital roles in physiological signaling (StatPearls, 2023, Free Radicals).

Other names

Oxidative stressROS-mediated damageOxidative injuryFree radical damage to biomoleculesRedox imbalance

Neutralization of reactive oxygen species (ROS) and reactive nitrogen species (RNS) through direct chemical scavenging or enhancement of endogenous antioxidant enzyme systems to prevent the oxidation of lipids, proteins, and nucleic acids.