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Tau and alpha-synuclein in susceptibility to, and dementia in, Parkinson's disease

Goris, A; Williams-Gray, CH; Clark, GR; Foltynie, T; Lewis, SJG; Brown, J; Ban, M; ... Sawcer, SJ; + view all (2007) Tau and alpha-synuclein in susceptibility to, and dementia in, Parkinson's disease. ANN NEUROL , 62 (2) 145 - 153. 10.1002/ana.21192.

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Abstract

Objective: Parkinson's disease (PD) is a neurodegenerative condition that typically presents as a movement disorder but is known to be associated with variable degrees of cognitive impairment including dementia. We investigated the genetic basis of susceptibility to and cognitive heterogeneity of this disease.Methods: In 659 PD patients, 109 of which were followed up for 3.5 years from diagnosis, and 2,176 control subjects, we studied candidate genes involved in protein aggregation and inclusion body formation, the pathological hallmark of Parkinsonism: microtubule-associated protein tau (MAPT), glycogen synthase kinase-3 beta (GSK3B), and (x-synuclein (SNCA).Results: We observed that cognitive decline and the development of PD dementia are strongly associated (p = 10(-4)) with the inversion polymorphism containing MAPT We also found a novel synergistic interaction between the MAPT inversion polymorphism and the single nucleotide polymorphism rs356219 from the 3' region of SNCA. In our data, carrying a risk genotype at either of these loci marginally increases the risk for development of PD, whereas carrying the combination of risk genotypes at both loci approximately doubles the risk for development of the disease (p = 3 x 10(-6)).Interpretation: Our data support the hypothesis that tau and alpha-synuclein are involved in shared or converging pathways in the pathogenesis of PD, and suggest that the tau inversion influences the development of cognitive impairment and dementia in patients with idiopathic PD. These findings have potentially important implications for understanding the interface between tau and alpha-synuclein pathways in neurodegenerative disorders and for unraveling the biological basis for cognitive impairment and dementia in PD.

Type: Article
Title: Tau and alpha-synuclein in susceptibility to, and dementia in, Parkinson's disease
DOI: 10.1002/ana.21192
Keywords: PROGRESSIVE SUPRANUCLEAR PALSY, WHOLE-GENOME ASSOCIATION, LINKAGE DISEQUILIBRIUM, GENE POLYMORPHISM, NO EVIDENCE, HAPLOTYPE, EXPRESSION, TRANSCRIPTION, POPULATION, INVERSION
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Clinical and Movement Neurosciences
URI: http://discovery.ucl.ac.uk/id/eprint/86902
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