4-hydroxy Nonenal

4-hydroxy Nonenal (CAS No.: 75899-68-2) is a bioactive α,β-unsaturated hydroxyalkenal generated during lipid peroxidation of ω-6 polyunsaturated fatty acids, widely recognized as a robust biomarker of oxidative and nitrosative stress in biological systems. This electrophilic aldehyde participates in diverse cellular processes by forming stable covalent adducts with nucleophilic residues in proteins, nucleic acids, and membrane lipids, thereby modulating signaling pathways associated with redox homeostasis, inflammation, apoptosis, and metabolic regulation. It is both a substrate and functional modulator of acetaldehyde dehydrogenase 2 (ALDH2), linking its metabolism to mitochondrial detoxification pathways and cellular stress responses. 4-hydroxy Nonenal exhibits pleiotropic biological activities, including cytotoxic, growth-inhibitory, genotoxic, and chemotactic effects, and has been shown to influence mitochondrial function, including inhibition of pro-oxidant-induced calcium release at low micromolar concentrations. In cancer research, it is frequently employed to investigate mitochondrial dysfunction and redox-driven signaling mechanisms underlying tumor progression. In vitro and cellular studies typically utilize concentrations in the micromolar range to model oxidative damage and signal transduction events, while experimental dosing in animal models varies depending on study design. As a result, 4-hydroxy Nonenal serves as a valuable tool compound in biomedical research and drug discovery for elucidating mechanisms of lipid peroxidation, oxidative stress-mediated signaling, and mitochondrial regulation.