RESUMO
OBJECTIVE: To evaluate the relationship between G894T (Glu298Asp) polymorphism in the endothelial nitric oxide synthase (eNOS) gene and essential hypertension in Chinese population from different regions. METHODS: Odds ratios (ORs) of G894T genotype and allele distributions in essential hypertension patients against healthy controls were analyzed. All the relevant studies were screened with poor-qualified studies eliminated. Meta-analysis software MIX (Meta-analysis with interactive explanations-version 1.71), was applied for investigating and analyzing heterogeneity among individual studies and summarizing the effects across studies, and the risk of publication bias was evaluated. RESULTS: A total of 1900 cases and 1216 controls from 10 studies were included. The heterogeneity between studies was significant (P = 0.013; P = 0.011) and there were substantial sources of publication bias (P = 0.049; P = 0.038). The pooled OR (with 95%CI) of GT + TT vs. GG genotype was 1.79 (1.33 - 2.42) (Z = 3.83, P < 0.001), and the pooled OR (with 95%CI) of T vs. G allele was 1.73 (1.32 - 2.27) (Z = 3.92, P < 0.001). CONCLUSION: In Chinese population, mainly the Hans ethnic group, 894G-->T mutation in the eNOS appeared to be related to essential hypertension.
