Scopoletin

Scopoletin (CAS No.: 92-61-5) is a naturally occurring coumarin widely distributed in higher plants and extensively studied as a bioactive small molecule in pharmacological and biochemical research. It functions as an inhibitor of acetylcholinesterase, thereby modulating acetylcholine hydrolysis and influencing cholinergic neurotransmission, which underpins its frequent use in studies of neurodegenerative disorders, particularly Alzheimer’s disease models investigating cholinergic dysfunction. In addition to its effects on AChE, scopoletin has been reported to interact with multiple signaling pathways, including the upregulation of PPARγ and activation of Nrf2 through phosphorylation, as well as inhibition of aldose reductase, suggesting roles in oxidative stress regulation, metabolic control, and inflammation-related processes. Its iron-binding capacity further reflects its relevance in cellular redox biology and metal homeostasis. In vitro activities are generally observed in the nanomolar to low micromolar range depending on the assay system and target, supporting its utility as a pharmacological probe. Scopoletin is commonly employed in cell-based and animal models to dissect mechanisms of oxidative stress, inflammatory signaling, and neuroprotection, and is also used in compound screening workflows for drug discovery, with experimental concentrations or dosing regimens varying according to specific study designs and endpoints.