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Potent Neurotoxic Fluorinated 1‐Methyl‐4‐Phenyl‐1,2,3,6‐Tetrahydropyridine Analogs as Potential Probes in Models of Parkinson Disease
Author(s) -
Riachi Naji J.,
Arora Pramod K.,
Sayre Lawrence M.,
Harik Sami I.
Publication year - 1988
Publication title -
journal of neurochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.75
H-Index - 229
eISSN - 1471-4159
pISSN - 0022-3042
DOI - 10.1111/j.1471-4159.1988.tb10610.x
Subject(s) - mptp , neurotoxicity , dopaminergic , monoamine oxidase , monoamine oxidase b , chemistry , in vivo , dopamine , pharmacology , parkinson's disease , neurotoxin , neuroscience , toxicity , biochemistry , enzyme , medicine , biology , disease , organic chemistry , microbiology and biotechnology
We synthesized a number of fluorinated analogs of 1‐methyl‐4‐phenyl‐1,2,3,6‐tetrahydropyridine (MPTP), and tested their suitability as substrates for monoamine oxidase B in vitro and their dopaminergic neurotoxicity in vivo. Two of the compounds tested, 2′‐F‐MPTP and 2′‐CF 3 ‐MPTP, were better enzyme substrates and possessed more potent neurotoxicity for nigrostriatal dopamine neurons than MPTP, especially 2′‐F‐MPTP. The results of the in vivo neurotoxicity experiments correlated well with the suitability of the compounds as substrates for monoamine oxidase. These findings could serve as a basis for the use of 18 F‐labeled analogs of MPTP for positron emission tomography studies of nonhuman primates for better understanding of the factors underlying MPTP toxicity. Furthermore, the discovery of two MPTP analogs with enhanced selective neurotoxicity to dopaminergic neurons may be an important clue in the continuing efforts to define the chemical structure‐activity factors governing MPTP neurotoxic activation mechanisms.