title: A sheep model for MPTP induced Parkinson-like symptoms.
abstract: Administration of MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine) causes behaviors reminiscent of idiopathic Parkinson's disease in man and other primates, but development of such symptomology has not been reported to date in other species. We now report a sheep model which responds to administration of low levels of the compound with well defined, apparently permanent symptomology very similar to that seen in primates. Histological examination indicates drug dependent destruction of the substantia nigra which, in sheep, lacks the high levels of neuromelanin present in primates. Following infusion of either MPTP or MPP+, only the metabolite MPP+ was detected in serum with this metabolite demonstrating a very long half life. The rapid disappearance of MPTP suggests that its potency will be directly related to a function of body size and inversely related to heart rate.
authors.affiliation: Department of Entomology, University of California, Davis 95616.
authors.forename: B D
authors.initials: BD
authors.lastname: Hammock
authors.forename: A M
authors.initials: AM
authors.lastname: Beale
authors.forename: T
authors.initials: T
authors.lastname: Work
authors.forename: S J
authors.initials: SJ
authors.lastname: Gee
authors.forename: R
authors.initials: R
authors.lastname: Gunther
authors.forename: R J
authors.initials: RJ
authors.lastname: Higgins
authors.forename: T
authors.initials: T
authors.lastname: Shinka
authors.forename: N
authors.initials: N
authors.lastname: Castagnoli
mesh_terms: D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine / Q000378:metabolism / Q000493:pharmacokinetics; D015655:1-Methyl-4-phenylpyridinium / Q000097:blood; D000818:Animals; D001921:Brain / Q000473:pathology*; D004195:Disease Models, Animal; D005260:Female; D010302:Parkinson Disease, Secondary / Q000473:pathology / Q000503:physiopathology*; D012756:Sheep
chemical_list: D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine; D015655:1-Methyl-4-phenylpyridinium