Parkinsonism Induced By 1-Methyl-4-Phenyl-1, 2, 3, 6-Tetrahydropyridine (MPTP): Implications for Treatment and the Pathogenesis of Parkinson’s Disease

TLDR

The study reviews treatment of seven patients with moderate to severe MPTP‑induced parkinsonism. Patients with MPTP‑induced parkinsonism experienced rapid onset of levodopa side‑effects—wearing‑off, dyskinesias, on‑off phenomena, and psychiatric complications—suggesting that disease severity, not therapy duration, drives these complications and supporting the analogy to idiopathic Parkinson’s disease.

Abstract

ABSTRACT Our experience in treating 7 patients with moderate to severe parkinsonism induced by l-methyl-4-phenyl-1, 2, 3, 6-tetrahydropyridine (MPTP) is reviewed. Virtually all of the problems typically encountered with dopamine precursor and agonist therapy in treating Parkinson’s disease have been observed during a one and one half year follow-up period, including “end-of-dose” deterioration (or “wearing off’), “peak-dose” dyskinesias, “on-off” phenomena, and psychiatric complications. These have occurred much earlier than is typically seen when treating the idiopathic disease. This rapid evolution of therapeutic side-effects favors the view that at least some of the complications of dopamine precursor therapy may be related to severity of disease rather than the length of levodopa therapy. Finally, we suggest that the occurrence of this full array of therapeutic complications in patients with MPTP-induced parkinsonism furthers the analogy between this syndrome and Parkinson’s disease.