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Erschienen in: International Archives of Occupational and Environmental Health 3/2007

01.01.2007 | Original Article

8-Hydroxydeoxyguanosine levels in human leukocyte and urine according to exposure to organophosphorus pesticides and paraoxonase 1 genotype

verfasst von: Chul-Ho Lee, Michihiro Kamijima, Heon Kim, Eiji Shibata, Jun Ueyama, Takayoshi Suzuki, Kenji Takagi, Isao Saito, Masahiro Gotoh, Hatsuki Hibi, Hisao Naito, Tamie Nakajima

Erschienen in: International Archives of Occupational and Environmental Health | Ausgabe 3/2007

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Abstract

Objective

In order to investigate a role of paraoxonase 1 (PON1) polymorphism in organophosphorus (OP)-induced 8-hydroxydeoxyguanosine (8-OHdG) levels, urinary metabolites of OP, PON1 genotypes, and 8-OHdG levels in leukocyte and urine were measured in OP indoor insecticide sprayers and controls in summer and winter.

Methods

The study population contained 18 male sprayers and age-matched 18 male controls. Sprayers were primarily exposed to OP insecticides (mainly fenitrothion, dichlorvos, chlorpyrifos, and diazinon), and partially to pyrethroids (mainly permethrin) and carbamates (mainly propoxur). Urinary metabolites of OP were measured by gas chromatography-mass spectrometry. 8-OHdG levels in leukocyte and urine were measured by ELISA kit. PON1 genotype was identified using allele-specific fluorogenic TaqMan probes.

Results

The mean concentrations of urinary dimethyl phosphate (DMP) and total dialkyl phosphates (DAP) in summer and those of 8-OHdG in summer and winter were significantly higher in OP sprayers than controls. This resulted in a significant positive correlation between 8-OHdG levels and urinary DMP or DAP, suggesting a correlation between OP metabolites and production of oxidative stress. Of PON1 genotypes, incidences of Q/Q, Q/R, and R/R types were 17, 39, and 44% in OP sprayers and controls, respectively. Although PON1 polymorphism did not contribute to the leukocyte and urinary 8-OHdG levels, the urinary OP metabolite concentrations in summer showed a significant decrease as the number Q allele decreased.

Conclusion

These results indicate that an increase in OP metabolites is associated with a high level of oxidative stress in OP sprayers, although the contribution of the PON1 polymorphism to the metabolism of OP is still unclear.
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Metadaten
Titel
8-Hydroxydeoxyguanosine levels in human leukocyte and urine according to exposure to organophosphorus pesticides and paraoxonase 1 genotype
verfasst von
Chul-Ho Lee
Michihiro Kamijima
Heon Kim
Eiji Shibata
Jun Ueyama
Takayoshi Suzuki
Kenji Takagi
Isao Saito
Masahiro Gotoh
Hatsuki Hibi
Hisao Naito
Tamie Nakajima
Publikationsdatum
01.01.2007
Verlag
Springer-Verlag
Erschienen in
International Archives of Occupational and Environmental Health / Ausgabe 3/2007
Print ISSN: 0340-0131
Elektronische ISSN: 1432-1246
DOI
https://doi.org/10.1007/s00420-006-0128-1

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