Abstract
Oxidative stress is thought to play an important role in the pathophysiology of pre-eclampsia. Polymorphism of Glutathione S-transferase P1 (GSTP1) protect cells against the cytotoxic effects of reactive compounds. Published data on the association between the GSTP1 polymorphism and pre-eclampsia risk are controversial. A meta-analysis was performed to assess whether the polymorphisms of GSTP1 are associated with pre-eclampsia risk. Medline, Embase, China National Knowledge Infrastructure, and Chinese Biomedicine Databases were searched to identify eligible studies. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) for GSTP1 polymorphism and pre-eclampsia were appropriately derived from fixed-effects or random effects models. A total of six studies were enrolled in this meta-analysis. The pooled analyses revealed that GSTP1 polymorphism was not associated with pre-eclampsia risk. Heterogeneity among studies was founded in allele contrast. Galbraith plot analyses were performed to assess the source of heterogeneity and one study was found to be contributor of heterogeneity. The heterogeneity decreased significantly after excluding that study. Present meta-analysis demonstrates that GSTP1 polymorphism may be not correlated with pre-eclampsia risk.
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