RT Journal Article SR Electronic T1 Association of polymorphisms in the Tau and Saitohin genes with Parkinson’s disease JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 478 OP 480 DO 10.1136/jnnp.2003.015750 VO 75 IS 3 A1 C Levecque A1 A Elbaz A1 J Clavel A1 J S Vidal A1 P Amouyel A1 A Alpérovitch A1 C Tzourio A1 M C Chartier-Harlin YR 2004 UL http://jnnp.bmj.com/content/75/3/478.abstract AB Background: The Saitohin gene has recently been identified in intron 9 of the Tau gene. Because an association between Parkinson’s disease and Tau has been described, Saitohin represents a candidate gene for Parkinson’s disease. Objective: To test these two genes for their association with Parkinson’s disease in a large community based case–control study. Results: Cases (n = 208) were more often homozygotes for the Tau H1 haplotype than controls (n = 483; odds ratio (OR) = 1.71 (95% confidence interval, 1.20 to 2.43); p = 0.003), and the saitohin Q allele was in complete linkage disequilibrium with the H1 haplotype. This association was stronger among cases with Parkinson’s disease onset below 65 years (⩽65 years: OR = 2.52 (1.49 to 4.25); p<0.001) than among those with older onset (>65 years: OR = 1.20 (0.73 to 1.98); p<0.47). Conclusions: The data suggest that there is a functional polymorphism at this locus involved in Parkinson’s disease.