title: P450 enzymes and Parkinson's disease: the story so far.
abstract: Environmental or endogenous toxins may cause nigral cell death in Parkinson's disease (PD) as a result of genetic susceptibility conferred by altered expression of P450 enzymes. Attention over the last 10 years has focused on CYP2D6 polymorphisms and susceptibility to PD. This review summarizes reports arising from both phenotypic and genotypic studies involving CYP2D6 and PD. Phenotypic studies have failed to support a link between CYP2D6 and PD. The more powerful genetic studies initially indicated a link between CYP2D6B mutations and PD, but critical analysis of the literature and recent studies emerging from independent laboratories fail to confirm this. Mutations in CYP2D6B are also not implicated in familial PD. As yet, there is no conclusive evidence to suggest that CYP2D6 polymorphisms confer susceptibility to PD. Whether polymorphisms in other P450s (for example, CYP1A1 and CYP2E1) are implicated in PD remains to be established.
authors.affiliation: Neurodegenerative Diseases Research Centre, Pharmacology Group, King's College, London, England.
authors.forename: A G
authors.initials: AG
authors.lastname: Riedl
authors.forename: P M
authors.initials: PM
authors.lastname: Watts
authors.forename: P
authors.initials: P
authors.lastname: Jenner
authors.forename: C D
authors.initials: CD
authors.lastname: Marsden
mesh_terms: D000818:Animals; D016923:Cell Death / Q000235:genetics; D019363:Cytochrome P-450 CYP1A1 / Q000235:genetics; D019389:Cytochrome P-450 CYP2D6 / Q000235:genetics; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics*; D004252:DNA Mutational Analysis; D015971:Gene Expression Regulation, Enzymologic / Q000502:physiology; D005838:Genotype; D006801:Humans; D010300:Parkinson Disease / Q000235:genetics* / Q000473:pathology; D010641:Phenotype; D011110:Polymorphism, Genetic / Q000235:genetics; D013378:Substantia Nigra / Q000473:pathology
chemical_list: D003577:Cytochrome P-450 Enzyme System; D019363:Cytochrome P-450 CYP1A1; D019389:Cytochrome P-450 CYP2D6