Chronic TVP-1012 (rasagiline) dose--activity response of monoamine oxidases A and B in the brain of the common marmoset
Gotz ME, Breithaupt W, Sautter J, Kupsch A,
Schwarz J, Oertel WH, Youdim MB,
Riederer P, Gerlach M.
Department of Psychiatry,
Wurzburg, Federal Republic of Germany.
J Neural Transm Suppl. 1998;52:271-8.


The stereospecific form of the known acetylenic mechanism-based MAO-inhibitor AGN1135 (Rasagiline, TVP-1012) is devoid of sympathomimetic amphetamine-like properties. To evaluate the efficiency and selectivity of subcutaneous injections of TVP-1012 (dose range from 0.01 up to 10 mg/kg for 7 days) the activities of monoamine oxidases A and B (MAO-A,-B) were determined in different brain regions of the common marmoset. At a dose of 0.1 mg/kg TVP-1012, almost 80% of MAO-B activity is inhibited in all brain regions investigated (prefrontal and occipital cortex, cerebellum, caudate nucleus, putamen, nucleus accumbens). In contrast, MAO-A is not inhibited in putamen and nucleus accumbens. However, by increasing the TVP-1012 dose to 0.5 mg/kg, MAO-A is inhibited to a significant extent as well, concomitant to total inhibition of MAO-B. The results obtained indicate that TVP-1012 irreversibly inhibits both types of MAO in the common marmoset with selectivity for MAO-B at doses less than 0.5 mg/kg. TVP-1012 could be useful in studies requiring selective MAO-B inhibition without concomitant sympathomimetic amphetamine-like effects and could thus be of therapeutic interest for Parkinson's disease and retarded depression.

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