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K-variant BCHE and pesticide exposure: Gene-environment interactions in a case–control study of Parkinson’s disease in Egypt

  • Thomas W. Rösler
  • , Mohamed Salama
  • , Ali S. Shalash
  • , Eman M. Khedr
  • , Abdelhalim El-Tantawy
  • , Gharib Fawi
  • , Amal El-Motayam
  • , Ehab El-Seidy
  • , Mohamed El-Sherif
  • , Mohamed El-Gamal
  • , Mohamed Moharram
  • , Mohammad El-Kattan
  • , Muhammad Abdel-Naby
  • , Samia Ashour
  • , Ulrich Müller
  • , Astrid Dempfle
  • , Gregor Kuhlenbäumer
  • , Günter U. Höglinger
  • German Center for Neurodegenerative Diseases (DZNE)
  • Technical University of Munich
  • Faculty of Medicine
  • Ain Shams University
  • Assiut University
  • Sohag University
  • Zagazig University, Faculty of Medicine
  • Tanta University
  • Justus-Liebig-Universität Gießen
  • Christian-Albrechts-University of Kiel
  • University of Munich

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Pesticide exposure is associated with increased risk of Parkinson’s disease (PD). We investigated in Egypt whether common variants in genes involved in pesticide detoxification or transport might modify the risk of PD evoked by pesticide exposure. We recruited 416 PD patients and 445 controls. Information on environmental factors was collected by questionnaire-based structured interviews. Candidate single-nucleotide polymorphisms (SNPs) in 15 pesticide-related genes were genotyped. We analyzed the influence of environmental factors and SNPs as well as the interaction of pesticide exposure and SNPs on the risk of PD. The risk of PD was reduced by coffee consumption [OR = 0.63, 95% CI: 0.43–0.90, P = 0.013] and increased by pesticide exposure [OR = 7.09, 95% CI: 1.12–44.01, P = 0.036]. The SNP rs1126680 in the butyrylcholinesterase gene BCHE reduced the risk of PD irrespective of pesticide exposure [OR = 0.38, 95% CI: 0.20–0.70, P = 0.002]. The SNP rs1803274, defining K-variant BCHE, interacted significantly with pesticide exposure (P = 0.007) and increased the risk of PD only in pesticide-exposed individuals [OR = 2.49, 95% CI: 1.50–4.19, P = 0.0005]. The K-variant BCHE reduces serum activity of butyrylcholinesterase, a known bioscavenger for pesticides. Individuals with K-variant BCHE appear to have an increased risk for PD when exposed to pesticides.

Original languageEnglish
Article number16525
JournalScientific Reports
Volume8
Issue number1
DOIs
StatePublished - 1 Dec 2018

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