Biological macromolecules

Biological macromolecules, including DNA, proteins, and lipids, are the primary cellular components susceptible to damage by reactive oxygen species (ROS). This process, known as oxidative stress, occurs when the production of ROS exceeds the cell's antioxidant capacity, leading to structural and functional alterations in these molecules (National Institutes of Health, 2022). DNA damage often results in mutations or strand breaks, while protein oxidation can lead to loss of enzymatic activity or aggregation, and lipid peroxidation disrupts membrane integrity (PubMed, 2021). In therapeutic contexts, this "target" is often approached either by using antioxidants to protect these macromolecules from damage in diseases like neurodegeneration or by intentionally inducing ROS-mediated damage to kill cells, as seen in certain chemotherapies and photodynamic therapy (StatPearls, 2023). Because it encompasses a broad range of molecules and a general chemical process rather than a specific protein, it is typically classified as a mechanism of action or a pathological state rather than a discrete therapeutic target. Drugs such as doxorubicin and bleomycin utilize ROS generation to induce cytotoxic effects, whereas agents like N-acetylcysteine serve to mitigate such damage. Monitoring this damage is often achieved through biomarkers like 8-hydroxy-2'-deoxyguanosine for DNA or malondialdehyde for lipids.

Other names

Cellular macromoleculesOxidative stress targetsROS targetsDNA, proteins, and lipidsROS-mediated damage targets

Induction of oxidative stress, ROS scavenging, and prevention of lipid peroxidation