1-Methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid

1-Methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid (CAS No.: 3719-45-7) is a naturally occurring small molecule isolated from the entomopathogenic fungus Cordyceps bassiana, classified as a pyridone-derived metabolite with relevance in inflammation-related signaling research. This compound has been characterized as an inhibitor of activator protein-1 (AP-1) transcriptional activity, as demonstrated by its ability to suppress AP-1-mediated luciferase reporter expression, and it is also reported to downregulate the expression of cyclooxygenase-2 (COX-2), a key enzyme involved in inflammatory gene regulation. Through modulation of AP-1-dependent pathways, it serves as a useful molecular probe for investigating transcriptional control mechanisms underlying inflammatory responses and related cellular processes. Available data suggest that its biological activity is typically observed in the micromolar concentration range in vitro, although precise potency may vary depending on assay conditions and model systems. This compound is therefore suitable for use in biochemical and cell-based assays aimed at elucidating AP-1 signaling dynamics, as well as in exploratory studies employing disease-relevant models such as inflammation-associated skin disorders, where experimental concentrations or dosing regimens should be determined according to specific research objectives.