1,4-Naphthoquinone

1,4-Naphthoquinone (CAS No.: 130-15-4) is a quinone-based small molecule widely utilized in biochemical and pharmacological research as a multifunctional enzyme inhibitor with relevance to cancer biology, neuropharmacology, and inflammation-related studies. It exhibits broad-spectrum inhibitory activity against monoamine oxidases (MAO-A and MAO-B), DNA polymerases, and NF-κB signaling, and has also been reported to interfere with DNA topoisomerase and acetyltransferase activities, thereby modulating neurotransmitter metabolism, DNA replication, and transcriptional regulation. Mechanistically, this compound induces oxidative stress, depletes intracellular glutathione, inhibits DNA polymerase-mediated DNA synthesis, and blocks NF-κB nuclear translocation, collectively contributing to suppression of cell proliferation and induction of apoptosis or necrosis in various experimental systems. In vitro studies indicate activity across low to moderate micromolar ranges depending on the specific molecular target and assay conditions. Additionally, it demonstrates antibacterial and anti-biofilm properties, further expanding its utility in microbiological research. 1,4-Naphthoquinone is commonly employed in cell-based and biochemical assays to investigate enzyme function, signaling pathways, and oxidative stress responses, as well as in model systems examining tumor cell growth, endothelial function, and inflammation, with experimental concentrations varying according to specific study designs and objectives.