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  • Title: Meta-analysis of genetic studies from journals published in China of ischemic stroke in the Han Chinese population.
    Author: Xu X, Li J, Sheng W, Liu L.
    Journal: Cerebrovasc Dis; 2008; 26(1):48-62. PubMed ID: 18511872.
    Abstract:
    BACKGROUND: The aim of this study was to confirm the nature and number of genes contributing to stroke risk and qualify the genetic risk of each susceptibility gene in the Han Chinese population. METHODS: After collecting all case-control studies related to DNA polymorphism of any candidate gene for ischemic stroke in Han Chinese, strict selection criteria and exclusion criteria were determined and different effect models were used according to the difference in heterogeneity. Meta-analyses were carried out by Revman 4.0 software and the publication bias was further evaluated through calculation of fail-safe numbers in the included gene polymorphisms. RESULTS: Seventy-six studies were included in the meta-analyses which were all published in mainland China and referred to 6 candidate genes and 7 polymorphisms. Among the gene polymorphisms tested in the study, association of gene polymorphisms with increasing risk of ischemic stroke was confirmed in 6 polymorphisms including angiotensin-converting enzyme insertion/deletion (ACE I/D; OR = 1.87, 95% CI = 1.45-2.42), methylenetetrahydrofolate reductase (MTHFR) C677T (OR = 1.55, 95% CI = 1.26-1.90), plasminogen activator inhibitor 1 (PAI-1) 4G/5G (OR = 1.79, 95% CI = 1.20-2.67), beta-fibrinogen (beta-Fg) -455A/G (OR = 1.48, 95% CI = 1.14-1.92), beta-Fg -148T/C (OR = 1.72, 95% CI = 1.42-2.07), apolipoprotein E (ApoE) epsilon2-4 (OR = 2.39, 95% CI = 1.94-2.95). Because of the obvious publication bias, the association between paraoxonase 1 (PON-1) polymorphisms and stroke risk was not established although the OR of the meta-analysis suggested a positive result (OR = 1.14, 95% CI = 1.01-1.35). CONCLUSIONS: ACE D/I, MTHFR C677T, beta-Fg -455A/G, beta-Fg -148T/C, PAI-1 4G/5G, and ApoE epsilon2-4 were associated with risk of ischemic stroke in Han Chinese.
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