European Journal of Epidemiology

, Volume 26, Issue 7, pp 547–555 | Cite as

Parkinson’s disease risk from ambient exposure to pesticides

  • Anthony Wang
  • Sadie Costello
  • Myles Cockburn
  • Xinbo Zhang
  • Jeff Bronstein
  • Beate Ritz
NEURO-EPIDEMIOLOGY

Abstract

Due to the heavy and expanding agricultural use of neurotoxic pesticides suspected to affect dopaminergic neurons, it is imperative to closely examine the role of pesticides in the development of Parkinson’s disease (PD). We focus our investigation on pesticide use in California’s heavily agricultural central valley by utilizing a unique pesticide use reporting system. From 2001 to 2007, we enrolled 362 incident PD cases and 341 controls living in the Central Valley of California. Employing our geographic information system model, we estimated ambient exposures to the pesticides ziram, maneb, and paraquat at work places and residences from 1974 to 1999. At workplaces, combined exposure to ziram, maneb, and paraquat increased risk of PD three-fold (OR: 3.09; 95% CI: 1.69, 5.64) and combined exposure to ziram and paraquat, excluding maneb exposure, was associated with a 80% increase in risk (OR:1.82; 95% CI: 1.03, 3.21). Risk estimates for ambient workplace exposure were greater than for exposures at residences and were especially high for younger onset PD patients and when exposed in both locations. Our study is the first to implicate ziram in PD etiology. Combined ambient exposure to ziram and paraquat as well as combined ambient exposure to maneb and paraquat at both workplaces and residences increased PD risk substantially. Those exposed to ziram, maneb, and paraquat together experienced the greatest increase in PD risk. Our results suggest that pesticides affecting different mechanisms that contribute to dopaminergic neuron death may act together to increase the risk of PD considerably.

Keywords

Case–control study Geographic information systems (GIS) Paraquat Parkinson’s disease Pesticide Ziram 

Abbreviations

CA DPR

California department of pesticide regulation

CI

Confidence interval

GIS

Geographic information system

HIPAA

Health insurance portability and accountability act

OR

Odds ratio

PD

Parkinson’s disease

PLSS

Public land survey system

PUR

Pesticide use report

UCLA

University of California Los Angeles

UPS

Ubiquitin proteasome system

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Anthony Wang
    • 1
  • Sadie Costello
    • 2
  • Myles Cockburn
    • 3
  • Xinbo Zhang
    • 3
  • Jeff Bronstein
    • 4
  • Beate Ritz
    • 5
    • 6
  1. 1.EpidemiologyUCLA School of Public HealthLos AngelesUSA
  2. 2.Environmental Health SciencesUC Berkeley School of Public HealthBerkeleyUSA
  3. 3.Preventive Medicine and GeographyUSC/Keck School of MedicineLos AngelesUSA
  4. 4.Neurology, UCLA School of MedicineLos AnglesUSA
  5. 5.Epidemiology, Environmental Health SciencesUCLA School of Public HealthLos AngelesUSA
  6. 6.NeurologyUCLA School of MedicineLos AngelesUSA

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