Iopanoic acid

Iopanoic acid (CAS No.: 96-83-3) is a synthetic iodinated small molecule classified as an organoiodine research reagent with historical use as a radiographic contrast related compound and current utility in endocrine and metabolic research as an inhibitor of iodothyronine 5 prime deiodinase activity, thereby modulating peripheral thyroid hormone conversion with primary relevance to thyroid hormone homeostasis pathways, including deiodinase regulated control of triiodothyronine generation and downstream thyroid receptor dependent transcriptional signaling; in biomedical research and early stage drug discovery workflows, it is commonly positioned as a pharmacological tool compound for mechanistic interrogation of deiodinase associated biology in cell based systems and in vivo experimental models, for pathway perturbation studies, and for benchmarking inhibitor like effects in target validation paradigms, while reported activity is generally described at micromolar to low millimolar experimental exposure ranges depending on assay format, biological matrix, and endpoint sensitivity, and investigators typically optimize concentration windows to balance pathway modulation with acceptable model specific tolerability, with concentrations or doses used in experiments typically depending on specific experimental designs and research objectives; when direct assay specific potency datasets are limited in a given platform, practical interpretation is often supported by class consistent behavior of deiodinase modulating iodinated aromatic compounds and by orthogonal readouts of thyroid hormone metabolism, gene expression response signatures, and biochemical conversion assays under strictly nonclinical research use conditions.