Brain Ischemia ; epidemiology ; genetics ; Genetic Predisposition to Disease ; Humans ; Pedigree ; Stroke ; epidemiology ; genetics

BACKGROUNDInflammation plays a pivotal role in the formation and progression of ischemic stroke. Recently, more and more epidemiological studies have focused on the association between C-reactive protein (CRP) -717A > G and -286C > T > A genetic polymorphisms and ischemic stroke. However, the findings of these researches are not conclusive.

METHODSWe performed a meta-analysis to determine whether these two polymorphisms are associated with the risk of ischemic stroke. Eligible studies were identified from the database of PubMed, Medline, Embase, Web of Science, CNKI, Weipu, and Wanfang. We calculated odds ratios (ORs) with 95% confidence intervals (CIs) to assess the strength of the association.

RESULTSFour articles were included in our study, including 1926 cases and 2678 controls for -717A > G polymorphism, 652 cases and 1103 controls for -286C > T > A polymorphism. The results of meta-analysis showed that single nucleotide polymorphism (SNP) -717A > G was not significantly associated with the risk of ischemic stroke (GG vs. AA, OR = 1.12, 95% CI = 0.83-1.50, P = 0.207; GG + GA vs. AA, OR = 1.04, 95% CI = 0.93-1.17, P = 0.533; GG vs. GA + AA, OR = 1.10, 95% CI = 0.82-1.47, P = 0.220). Meta-analysis of SNP - 286C > T > A also demonstrated no statistical evidence of a significant association with the risk of ischemic stroke (AA vs. CC, OR = 0.86, 95% CI = 0.59-1.25, P = 0.348; AA vs. CC, OR = 0.92, 95% CI = 0.80-1.06, P = 0.609; AA vs. CC, OR = 0.89, 95% CI = 0.62-1.30, P = 0.374).

CONCLUSIONSThis meta-analysis demonstrated little evidence to support a role of CRP gene -717A > G, -286C > T > A polymorphisms in ischemic stroke predisposition. However, to draw comprehensive and more reliable conclusions, further larger studies are needed to validate the association between CRP gene polymorphisms and ischemic stroke in various ethnic groups.

Alleles ; Brain Ischemia ; genetics ; C-Reactive Protein ; genetics ; Genetic Predisposition to Disease ; genetics ; Genotype ; Humans ; Polymorphism, Single Nucleotide ; genetics ; Stroke ; epidemiology ; genetics

PURPOSE: Stroke is the second leading cause of death and a major cause of morbidity and mortality worldwide. Evidence of variations in adiponectin(AdipoQ) genes that are associated with ischemic stroke has not been consistent, and it is unclear whether the same loci contribute to these associations in the Korean population. Using a Korean population, we tested ischemic stroke-associated AdipoQ markers. MATERIALS AND METHODS: In a preliminary genome-wide association study using 320 250 k Affymetrix NSP chips, AdipoQ was found to be associated with ischemic stroke in Koreans. To study of AdipoQ, a further 673 ischemic stroke patients and 267 unrelated individuals without a history of stroke or transient ischemic attack were examined in a case-control study. RESULTS: Six polymorphisms (rs182052G > A, rs16861205G > A, rs822391T > C, rs822396A > G, rs12495941G > T and rs3774261A > G) that had a minor allele frequency of over 1% were strongly associated with stroke (p < 0.05). Two of these, rs822391T > C and rs822396A > G showed this association on both dominant and additive logistic regression analysis after adjusting for age and sex. The haplotypes ht 1 (AGGCGG and AAGTAG) were significantly associated with susceptibility to stroke. CONCLUSION: Our findings show that polymorphisms in AdipoQ are associated with risk for ischemic stroke in the Korean population. This study lends further support to the putative role of AdipoQ in stroke.
Adiponectin/*genetics ; Aged ; Asian Continental Ancestry Group ; Female ; Genetic Predisposition to Disease/genetics ; Haplotypes ; Humans ; Male ; Middle Aged ; Polymorphism, Single Nucleotide/genetics ; Stroke/epidemiology/*genetics

OBJECTIVEWe aimed to investigate the cumulative effect of high CRP level and apolipoprotein B-to-apolipoprotein A-1 (ApoB/ApoA-1) ratio on the incidence of ischemic stroke (IS) or coronary heart disease (CHD) in a Mongolian population in China.

METHODSFrom June 2003 to July 2012, 2589 Mongolian participants were followed up for IS and CHD events based on baseline investigation. All the participants were divided into four subgroups according to C-reactive protein (CRP) level and ApoB/ApoA-1 ratio. Cox proportional hazard models were used to estimate the hazard ratios (HRs) and 95% confidence intervals (CIs) for the IS and CHD events in all the subgroups.

RESULTSThe HRs (95% CI) for IS and CHD were 1.33 (0.84-2.12), 1.14 (0.69-1.88), and 1.91 (1.17-3.11) in the 'low CRP level with high ApoB/ApoA-1', 'high CRP level with low ApoB/ApoA-1', and 'high CRP level with high ApoB/ApoA-1' subgroups, respectively, in comparison with the 'low CRP level with low ApoB/ApoA-1' subgroup. The risks of IS and CHD events was highest in the 'high CRP level with high ApoB/ApoA-1' subgroup, with statistical significance.

CONCLUSIONHigh CRP level with high ApoB/ApoA-1 ratio was associated with the highest risks of IS and CHD in the Mongolian population. This study suggests that the combination of high CRP and ApoB/ApoA-1 ratio may improve the assessment of future risk of developing IS and CHD in the general population.

Adult ; Apolipoproteins A ; classification ; genetics ; metabolism ; Apolipoproteins B ; genetics ; metabolism ; C-Reactive Protein ; genetics ; metabolism ; Cohort Studies ; Coronary Disease ; epidemiology ; etiology ; Gene Expression Regulation ; Humans ; Mongolia ; epidemiology ; Prospective Studies ; Risk Factors ; Stroke ; epidemiology ; etiology ; Young Adult

OBJECTIVEWe aimed to evaluate the combined effect of a family history of cardiovascular disease (CVD) and high serum C-reactive protein (CRP) on the stroke incidence in an Inner Mongolian population in China.

METHODSA prospective cohort study was conducted from June 2002 to July 2012, with 2,544 participants aged 20 years and over from Inner Mongolia, China. We categorized participants into four groups based on the family history of CVD and CRP levels.

RESULTSWe adjusted for age; sex; smoking; drinking; hypertension; body mass index; waist circumference; and blood glucose, triglycerides, low-density lipoprotein cholesterol, and high-density lipoprotein cholesterol levels. Compared with the group with no family history of CVD/low CRP levels, the group with family history of CVD/high CRP levels had a hazard ratio (HR) of 1.78 [95% confidence interval (CI), 1.03-3.07; P = 0.039] of stroke, and an HR of 2.14 (95% CI, 1.09-4.20; P = 0.027) of ischemic stroke. The HRs of hemorrhagic stroke for the other three groups were not statistically significant (all P > 0.05).

CONCLUSIONParticipants with both a family history of CVD and high CRP levels had the highest stroke incidence, suggesting that high CRP levels may increase stroke risk, especially of ischemic stroke, among individuals with a family history of CVD.

Asian Continental Ancestry Group ; C-Reactive Protein ; metabolism ; Cardiovascular Diseases ; epidemiology ; genetics ; China ; Genetic Predisposition to Disease ; Humans ; Prospective Studies ; Risk Factors ; Stroke ; epidemiology

OBJECTIVETo investigate the cumulative effect regarding the family history of cardiovascular disease and smoking on ischemic stroke events in population with Mongolian ethnicity.

METHODSBased on data gathered from the baseline investigation, a 10-year prospective cohort follow-up project was conducted among 2 589 participants with Mongolian ethnicity. Ischemic stroke events were defined as the outcomes of the study. All the 2 589 participants were categorized into four subgroups: without family history of cardiovascular disease/nonsmokers, without family history of cardiovascular disease/smokers, with family history of cardiovascular disease/nonsmokers and with family history of cardiovascular disease/smokers, according to family history of cardiovascular disease and smoking status. Cumlative incidence rates of events among the four subgroups was described with Kaplan-Meier curves. Cox proportional hazards model was used to estimate the hazard ratios (HRs) and 95% confidence intervals (95%CI) of ischemic stroke events among the four subgroups.

RESULTSData from the Kaplan-Meier curves showed that the cumulative incidence rates of ischemic stroke were 1.17% (15/1 278), 3.83% (37/967), 5.70% (9/158) and 8.33% (15/180) for the groups of no family history of cardiovascular disease/nonsmokers, no family history of cardiovascular disease/smokers, with family history of cardiovascular disease/nonsmokers and with family history of cardiovascular disease/smokers, respectively. By cox proportional hazards model, after adjusting for age, male, drinking status, systolic and diastolic blood pressure, body mass index, fasting glucose, total cholesterol, triglycerides, LDL cholesterol factors, the HRs (95% CI) of ischemic stroke were 2.26 (1.19-4.28) and 2.45 (1.13-5.33) in the no family history of cardiovascular disease/smokers group, with family history of cardiovascular disease/smokers group when compared to the no family history of cardiovascular disease/nonsmokers group, respectively. The risk of ischemic stroke appeared the highest in the group with family history of cardiovascular disease/smokers (all P<0.05).

CONCLUSIONSmoking may increase the risk of ischemic stroke events among the population with family history of cardiovascular disease.

Alcohol Drinking ; Asian Continental Ancestry Group ; ethnology ; genetics ; Blood Glucose ; Blood Pressure ; Body Mass Index ; Cardiovascular Diseases ; ethnology ; genetics ; Cholesterol ; Cholesterol, LDL ; Genetic Predisposition to Disease ; Humans ; Incidence ; Male ; Mongolia ; epidemiology ; Population Surveillance ; Proportional Hazards Models ; Prospective Studies ; Risk Factors ; Smoking ; adverse effects ; epidemiology ; Stroke ; epidemiology ; genetics