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Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease
08:09

Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease

Published on: January 7, 2014

Tau acts as an independent genetic risk factor in pathologically proven PD

Gavin Charlesworth1, Sonia Gandhi, Jose M Bras

  • 1Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, UK.

Neurobiology of Aging
|January 7, 2012
PubMed

Insights

The MAPT gene association with Parkinson's disease (PD) persists even after excluding progressive supranuclear palsy (PSP) cases. This suggests MAPT influences PD independently of PSP, clarifying genetic links in neurodegenerative diseases.

Area of Science:

  • Neurogenetics
  • Neuropathology
  • Neurodegenerative Diseases

Background:

  • The MAPT gene, encoding tau protein, is strongly associated with progressive supranuclear palsy (PSP).
  • Tau pathology is observed in Parkinson's disease (PD), but its role in PD pathogenesis is unclear.
  • Clinical and genetic overlap between PD and PSP raises concerns about diagnostic accuracy and genetic association studies.

Purpose of the Study:

  • To investigate whether the genetic association of MAPT with Parkinson's disease (PD) is confounded by undiagnosed cases of progressive supranuclear palsy (PSP).
  • To determine if MAPT variants influence PD risk independently of PSP.

Main Methods:

  • Analysis of neuropathologically confirmed Parkinson's disease cases.
  • Exclusion of cases with neuropathological features of progressive supranuclear palsy.
  • Assessment of the MAPT genetic association with Parkinson's disease in the remaining cohort.

Main Results:

  • The association between MAPT variants and Parkinson's disease remained significant after excluding all cases of progressive supranuclear palsy.
  • This indicates that the MAPT association in PD is not solely due to misdiagnosed PSP cases.
  • The findings support an independent role for MAPT in the pathogenesis of Parkinson's disease.

Conclusions:

  • The genetic link between MAPT and Parkinson's disease is robust and independent of progressive supranuclear palsy.
  • This research clarifies the specific contribution of MAPT to PD pathogenesis.
  • Future studies should consider MAPT as a direct risk factor for Parkinson's disease.

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