mofegiline and Parkinson-Disease--Secondary

MDL 72,974, (E)-2-(4-fluorophenethyl)-3-fluoroallylamine, was designed to be a selective inhibitor of monoamine oxidase type B (MAO-B). In vitro, the compound inhibits rat brain mitochondrial MAO in a concentration and time-dependent fashion and shows marked selectivity for the B form (IC50 = 680 and 3.6 nM for MAO-A and MAO-B, respectively). After oral administration to rats, the compound shows preferential inhibition of brain MAO-B with ED50 values of 8 and 0.18 mg/kg p.o. for the A and B forms, respectively. Selectivity is retained on repeat dosing. MDL 72,974 did not significantly potentiate the cardiovascular effects of intraduodenually-administered tyramine in anaesthetized rats and had only minor indirect sympathomimatic effects in the pithed rat. At MAO-B selective doses the neurotoxic effect of MPTP in mice was blocked.

Topics: Administration, Oral; Allyl Compounds; Animals; Butylamines; Dose-Response Relationship, Drug; Male; Mice; Monoamine Oxidase; Monoamine Oxidase Inhibitors; MPTP Poisoning; Parkinson Disease, Secondary; Rats; Rats, Inbred Strains