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Updated: Jul 8, 2025

Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease
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Gene-Environment Interactions for Parkinson's Disease.

Alexandra Reynoso1, Roberta Torricelli2, Benjamin Meir Jacobs2

  • 123andMe, Inc., Sunnyvale, CA, USA.

Annals of Neurology
|December 19, 2023
PubMed
Summary
This summary is machine-generated.

Genetic and environmental factors interact in Parkinson's disease (PD). This study found that type 2 diabetes, physical activity, BMI, and tobacco use modify PD risk based on an individual's genetic predisposition.

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Area of Science:

  • Neurogenetics
  • Environmental Epidemiology

Background:

  • Parkinson's disease (PD) etiology is complex, with numerous genetic and environmental factors implicated, yet much of the risk remains unexplained.
  • Understanding gene-environment interactions is crucial for elucidating PD pathogenesis and identifying novel therapeutic targets.

Purpose of the Study:

  • To investigate statistical interactions between genetic susceptibility factors and environmental/lifestyle exposures in Parkinson's disease.
  • To analyze data from the 23andMe, Inc. research dataset to identify gene-environment interplay in PD risk.

Main Methods:

  • Utilized a validated Parkinson's disease polygenic risk score and GBA gene variants.
  • Examined interactions with seven lifestyle and environmental factors: BMI, type 2 diabetes (T2D), tobacco use, caffeine consumption, pesticide exposure, head injury, and physical activity (PA).

Main Results:

  • Type 2 diabetes, higher BMI, caffeine consumption, and tobacco use were associated with lower PD odds.
  • Head injury, pesticide exposure, GBA carrier status, and PD polygenic risk score were linked to higher PD odds; no significant association for PA.
  • Significant interactions were found between PD polygenic risk and T2D, PA, BMI, and tobacco use, indicating genotype modifies environmental/lifestyle associations with PD.

Conclusions:

  • Preliminary evidence suggests that genotype can modify the association between certain environmental and lifestyle factors and Parkinson's disease.
  • These findings highlight the importance of considering gene-environment interactions in PD research and clinical practice.