Evidence for novel loci for late-onset Parkinson's disease in a genetic isolate from the Netherlands

A.M. Bertoli-Avella, M.C. Dekker, Y.S. Aulchenko, J.J. Houwing-Duistermaat, E. Simons, L. Testers, L.M. Pardo, T.A. Rademaker, P.J.F. Snijders, J.C. van Swieten, V. Bonifati, P. Heutink, C.M. van Duijn, B.A. Oostra

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We studied patients with idiopathic Parkinson's disease (PD) from an isolated population in the Netherlands aiming to map gene(s) involved in PD susceptibility. A total of 109 parkinsonism patients were independently ascertained, of whom 62 presented late-onset, idiopathic PD. Genealogical research showed that 45 index cases with idiopathic PD were linked to a common ancestor, indicating familiar clustering among the patients. This strong familial clustering was highly significant (P = 0.005) when compared to random controls from the same population. We performed a genome wide scan using 382 polymorphic markers in 44 distantly related PD patients plus 112 unaffected first-degree relatives and spouses. Our genome wide association analysis (DISLAMB) revealed evidence of association at a nominal P- value < 0.01 for markers D2S2333, D4S405, D9S158, D13S153. Other regions on chromosomes 3p, 4q, 14q, 17p and 17q were found at a significance level of P < 0.05. In a follow-up study, we investigated all the positive regions using a denser marker set and a larger sample (total of 630 individuals including all late-onset PD patients). The strongest evidence for association remained for the 9q and 14q region. A significant association was found for marker D9S1838 (OR = 2.0, 95% CI 1.1-3.5, P = 0.014) and D14S65 (OR = 3.2, 95% CI 1.7-6.1, P < 0.001). Moreover, a common haplotype with excess of sharing among late-onset PD cases was observed on both regions. Our results suggest the existence of two loci influencing PD susceptibility on chromosome 9q and 14q. © Springer-Verlag 2005.
Original languageEnglish
Pages (from-to)1-10
JournalHuman Genetics
Early online date14 Dec 2005
Publication statusPublished - 2005


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