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Clinical Manifestations.

Md Shafiqur Rahman1,2, Timothy Rittman3,4, Brian D M Tom1

  • 1MRC Biostatistics Unit, University of Cambridge, Cambridge, United Kingdom.

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Summary
This summary is machine-generated.

This study examines cognitive decline in individuals at high risk for Parkinson's disease (PD). Identifying sensitive cognitive domains aids early detection and management of PD-related dementia.

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Area of Science:

  • Neuroscience
  • Genetics
  • Cognitive Psychology

Background:

  • Parkinson's disease (PD) is frequently associated with dementia, with nearly half of patients diagnosed within 10 years.
  • Cognitive decline may precede PD diagnosis, necessitating research into age-related cognitive changes in at-risk individuals.

Purpose of the Study:

  • To investigate cognitive decline trajectories in individuals at high risk for Parkinson's disease.
  • To identify specific cognitive domains most affected in the early stages of PD risk.

Main Methods:

  • Utilized data from the National Institute for Health and Care Research's Genes and Cognition (G&C) study (approx. 35,000 participants).
  • Calculated polygenic risk scores (PRS) for PD using catalog number PGS004924 (90 genetic variants) in 9,878 participants.
  • Assessed cognitive performance across 11 tests at two time points (approx. 41 months apart) and analyzed common risk variants in GBA, LRRK2, MAPT, and SNCA genes.

Main Results:

  • Demographic and clinical characteristics will be compared between high- and low-risk PD groups.
  • Cognitive test performance differences between high- and low-risk PD groups will be analyzed at both assessment points.
  • Cognitive performance in relation to common PD genetic risk variants will be investigated.

Conclusions:

  • The study will elucidate cognitive performance trajectories in individuals with elevated PD risk.
  • Findings will aid in the early detection and management strategies for cognitive impairment in Parkinson's disease.