Journal
ACTA OBSTETRICIA ET GYNECOLOGICA SCANDINAVICA
Volume 89, Issue 3, Pages 360-366Publisher
WILEY-BLACKWELL
DOI: 10.3109/00016340903576020
Keywords
Preeclampsia; plasma; interleukins; coenzyme Q(10); oxidative stress
Categories
Funding
- Canadian Institutes of Health Research (CIHR) [MOP-67105]
- Quebec Heart Stroke Foundation
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Objective. Alteration of cytokines level and oxidative stress are both associated with preeclampsia (PE). We have investigated if IL-6 and IL-18 levels were related to coenzyme Q(10) (CoQ(10)), an antioxidant and a marker of oxidative stress in the plasma from normotensive and preeclamptic pregnancies. Design. IL-6 and IL-18 levels were determined by enzyme-linked immunosorbent assays in plasmas from preeclamptic (n = 29) and normotensive pregnancies (n = 30). The concentrations of CoQ(10) in the different redox forms were measured in plasma using liquid chromatography coupled to electrochemical detection. Data were analyzed using the Wilcoxon Rank-Sum test and correlations were obtained by the Spearman's Rho test. Main outcome measures. IL-6 concentrations were 2.8-fold higher in preeclamptic plasmas than in controls (p = 0.0006), and IL-18 concentrations were found significantly lower in preeclamptic samples than in controls (p = 0.007). No correlation was found between IL-18 or IL-6 and antioxidant vitamin CoQ(10) in plasmas from normotensive pregnant women. However, in PE, IL-18 level was positively correlated with the reduced form of CoQ(10) (r = 0.3680, p = 0.0495). Conclusion. This is the first demonstration that IL-18 is potentially linked to oxidative stress in PE, since its level correlates with the concentration of the powerful antioxidant CoQ(10). These results also associate the immune system with the oxidant/antioxidant imbalance observed in PE.
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