The role of MAO-b inhibitors in the treatment of Parkinson's disease.

S. Ruggieri, F. Stocchi, A. Denaro, F. Baronti, A. Agnoli

Research output: Contribution to journalArticlepeer-review


The classical treatment of Parkinson's disease (PD) using L-dopa plus a peripheral decarboxylase inhibitor (DI) often leads after 3-5 years to the onset of the so-called long-term L-dopa syndrome (LTS). LTS could depend on the chronic overload of L-dopa + ID and could be due to a consequent "receptor disease" and derangement of the neuronal functionality mainly in regard to the enzymatic chains, storage mechanisms and hyperactivity of the monoamine oxidase type B (MAO B). Deprenyl is a selective MAO-B inhibitor thought to be able to slow down the catabolism of dopamine and therefore to allow a decrease of the therapeutic regimen of L-dopa while in the meantime to obtain a more stable plasma and tissue levels and a constant therapeutic response. 76 parkinsonian patients were studied. Their L-dopa regimen was halved and 10 days after (-)deprenyl was added. After the decrease of L-dopa therapy a worsening of symptomatology was observed as expected. The association with (-)deprenyl was able to reverse this trend and when the inhibition of MAOB was really effective patients showed an improvement of symptoms even when compared to baseline values. No relevant side effects were observed and no patients dropped out.

Original languageEnglish
Pages (from-to)227-233
Number of pages7
JournalJournal of Neural Transmission, Supplement
Publication statusPublished - 1986

ASJC Scopus subject areas

  • Neuroscience(all)


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