title: The tau locus is not significantly associated with pathologically confirmed sporadic Parkinson's disease.
abstract: Mutations of the tau gene in frontotemporal dementia with parkinsonism and genetic association of the tau locus with progressive supranuclear palsy and corticobasal degeneration directly implicate the tau gene in the aetiology of these tauopathies. Three studies have also shown an association of the tau locus with clinically diagnosed Parkinson's disease. Noting the significant incidence of clinical misdiagnosis of Parkinson's disease, we investigated this tau gene association in a series of 157 pathologically confirmed cases of brain stem Lewy body Parkinson's disease by analysing their tau haplotype status. Although H1H1 homozygotes are elevated in the Parkinson's disease cases (63.1%) compared to controls (56.1%) this difference is not significant (P=0.22). These results indicate that any association must either be weak (with an odds ratio of less than 2) or that previous positive associations were due to contamination of clinically diagnosed cases with other diagnostic clinico-pathological entities such as neurofibrillary tangle Parkinson's syndrome.
authors.affiliation: Reta Lila Weston Institute of Neurological Studies, Royal Free & University College Medical School, London, UK
authors.forename: Rohan
authors.initials: R
authors.lastname: de Silva
authors.forename: John
authors.initials: J
authors.lastname: Hardy
authors.forename: Julia
authors.initials: J
authors.lastname: Crook
authors.forename: Naheed
authors.initials: N
authors.lastname: Khan
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Graham
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Morris
authors.forename: Nicholas W
authors.initials: NW
authors.lastname: Wood
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Lees
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics; D010300:Parkinson Disease / Q000175:diagnosis / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D016875:tau Proteins / Q000235:genetics*
chemical_list: D016875:tau Proteins