alexa Low paraoxonase in Persian Gulf War Veterans self-reporting Gulf War Syndrome
Toxicology

Toxicology

Toxicology: Open Access

Author(s): Mackness B, Durrington PN, Mackness MI

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Exposure to organophosphate (OP's) insecticides and nerve gases during the Persian Gulf War has been implicated in the development of Gulf War Syndrome. Paraoxonase (PON1) present in human serum detoxifies OP's. We determined the levels of PON1 in the serum of Gulf War Veterans and compared these to those found in a control population. One hundred fifty-two Gulf War Veterans from the UK who self-reported the presence of Gulf War Syndrome via a questionnaire and 152 age and gender matched controls were studied. PON1 activity, concentration, and genotype were determined. In the Gulf War Veterans, paraoxon hydrolysis was less than 50% of that found in the controls (100.3 (14.8-233.8) vs 214.6 (50.3-516.2) nmol/min/ml, P < 0.001). This low activity was independent of the effect of PON1 genotype. The serum PON1 concentration was also lower in the Gulf War Veterans (75.7 (18.1-351.3) vs 88.2 (34.5-527.4) microg/ml, P < 0.00025), which was again independent of PON1 genotype. There was no difference in the rate of diazoxon hydrolysis between the groups (10. 2 +/- 4.1 micromol/min/ml vs 9.86 +/- 4.4, P = NS). A decreased capacity to detoxify OP insecticides resulting from low serum PON1 activity may have contributed to the development of Gulf War Syndrome.

This article was published in Biochem Biophys Res Commun and referenced in Toxicology: Open Access

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