Glufosinate (ammonium salt)

Glufosinate (ammonium salt) (CAS No.: 77182-82-2) is a phosphinic acid analogue of glutamic acid widely utilized as a biochemical tool compound and herbicidal agent, belonging to a class of small molecules that disrupt nitrogen metabolism. As a racemic mixture containing the biologically active L-phosphinothricin and its inactive enantiomer, it functions as an irreversible inhibitor of glutamine synthetase isoforms, thereby blocking the assimilation of ammonia into glutamine and leading to the accumulation of toxic ammonia levels within cells. This inhibition perturbs key metabolic pathways, induces oxidative stress through the generation of reactive oxygen species, and promotes lipid peroxidation, ultimately resulting in cellular damage. In plant systems, glufosinate is metabolically converted to its active form, enhancing its inhibitory efficiency, and these properties have been leveraged in plant biology to investigate nitrogen metabolism and stress response pathways. Beyond plant research, its neurotoxic activity has attracted interest in studying glutamate-related signaling and excitotoxicity mechanisms in mammalian systems. In vitro studies indicate activity in the low micromolar range consistent with enzyme inhibition profiles, while in vivo and cell-based experiments employ concentrations or dosing regimens that vary depending on the specific experimental design and biological context. Consequently, glufosinate ammonium serves as a valuable research reagent for probing metabolic regulation, oxidative stress responses, and enzyme-targeted intervention strategies in both plant and biomedical research settings.