Lifetime pesticide use and telomere shortening among male pesticide applicators in the Agricultural Health Study

Lifang Hou, Gabriella Andreotti, Andrea A. Baccarelli, Sharon Savage, Jane A. Hoppin, Dale P. Sandler, Joseph Barker, Zhong Zheng Zhu, Mirjam Hoxha, Laura Dioni, Xiao Zhang, Stella Koutros, Laura E. Freeman Beane, Michael C. Alavanja

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Background: Telomere length (TL) in surrogate tissues may be influenced by environmental exposures. Objective: We aimed to determine whether lifetime pesticides use is associated with buccal cell TL. Methods: We examined buccal cell TL in relation to lifetime use of 48 pesticides for 1,234 cancer-free white male pesticide applicators in the Agricultural Health Study (AHS), a prospective cohort study of 57,310 licensed pesticide applicators. Participants provided detailed information on lifetime use of 50 pesticides at enrollment (1993-1997). Buccal cells were collected from 1999 to 2006. Relative telomere length (RTL) was measured using quantitative real-time polymerase chain reaction. We used linear regression modeling to evaluate the associations between specific pesticides and the logarithm of RTL, adjusting for age at buccal cell collection, state of residence, applicator license type, chewing tobacco use, and total lifetime days of all pesticide use. Results: The mean RTL for participants decreased significantly in association with increased lifetime days of pesticide use for alachlor (p = 0.002), 2,4-dichlorophenoxyacetic acid (2,4-D; p = 0.004), metolachlor (p = 0.01), trifluralin (p = 0.05), permethrin (for animal application) (p = 0.02), and toxaphene (p = 0.04). A similar pattern of RTL shortening was observed with the metric lifetime intensity-weighted days of pesticide use. For dichlorodiphenyltrichloroethane (DDT), we observed significant RTL shortening for lifetime intensity-weighted days (p = 0.04), but not for lifetime days of DDT use (p = 0.08). No significant RTL lengthening was observed for any pesticide. Conclusion: Seven pesticides previously associated with cancer risk in the epidemiologic literature were inversely associated with RTL in buccal cell DNA among cancer-free pesticide applicators. Replication of these findings is needed because we cannot rule out chance or fully rule out bias.

Original languageEnglish (US)
Pages (from-to)919-924
Number of pages6
JournalEnvironmental health perspectives
Volume121
Issue number8
DOIs
StatePublished - Aug 2013

Keywords

  • Agricultural Health Study
  • Cancer-free subjects
  • Occupational exposures
  • Pesticides
  • Telomere length

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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