Perfluorononanoic acid (PFNA)

Perfluorononanoic acid (PFNA) is a synthetic nine-carbon perfluorinated carboxylic acid belonging to the class of per- and polyfluoroalkyl substances (PFAS) (PubChem CID 67821). It is primarily recognized as an environmental contaminant and persistent organic pollutant rather than a therapeutic target for drug development (EPA, 2023). PFNA functions as a potent ligand and agonist for the peroxisome proliferator-activated receptor alpha (PPAR-alpha), a nuclear transcription factor that plays a critical role in lipid metabolism and cellular energy homeostasis (Wolf et al., 2012, PubMed). Chronic exposure to PFNA has been linked to a variety of adverse health effects, including hepatotoxicity, immunotoxicity, and developmental delays in animal models and human epidemiological studies (NIH/NIEHS, 2024). Industrially, PFNA has been utilized as a processing aid in the production of fluoropolymers, such as polyvinylidene fluoride (PVDF), though its use is increasingly restricted globally (OECD, 2021). Because PFNA is a chemical substance that acts as a toxicant rather than a biological receptor or enzyme intended for therapeutic modulation, it is classified as a non-target in the context of pharmacology.

Other names

Perfluorononan-1-oic acidNonafluorononanoic acidC9 perfluorinated acidPerfluoropelargonic acid

PFNA acts as a potent agonist of the Peroxisome proliferator-activated receptor alpha (PPAR-alpha), which leads to the induction of genes involved in fatty acid oxidation and peroxisome proliferation (Wolf et al., 2012, PubMed).