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  • Title: Properties of 3H-MPTP binding sites in human blood platelets.
    Author: Del Zompo M, Bernardi F, Bonuccelli U, Maggio R, Bajorek M, Arnone M, Corsini GU.
    Journal: Life Sci; 1986 Nov 17; 39(20):1885-91. PubMed ID: 3490614.
    Abstract:
    Our study demonstrates that 3H-1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (3H-MPTP) specifically binds to platelet membrane sites in humans. This specific, high affinity and saturable binding has properties similar to those of 3H-MPTP binding to rat and monkey brain, with a higher affinity. Deprenyl, a specific inhibitor of MAO type B enzyme, was the most potent drug in displacing 3H-MPTP from platelet binding sites. Platelets are considered a good model for central aminergic neurons and are very rich with MAO enzymatic activity, exclusively of type B. Our findings support previous evidence indicating a correspondence between 3H-MPTP binding sites and MAO-B enzyme. Moreover the presence of 3H-MPTP binding sites on human platelets suggests the use of this peripheral tissue as a simple model to study at least partially the mechanisms of neurotoxic action of MPTP.
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