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Objective To investigate the relationship between β-fibrinogen (β-Fg) gene -455G/A,- 148C/T polymorphisms and atrial fibrillation (AF) with cerebral infarction.Methods Polymerase chain reaction-restriction fragment length polymorphism was used to detect the genotypes of -455G/A and -148C/T in 97 patients with AF with cerebral infarction (AF with cerebral infarction group),80 patients with AF alone (AF group),and 98 health subjects (healthy control group).Results The A allele frequencies of -455G/A in the AF with cerebral infarction group and the AF group were 0.304 and 0.344 respectively.They were significantly higher than 0.179 in the healthy control group (all P＜0.05).The T allele frequencies of - 148C/T in the AF with cerebral infarction group and the AF group were 0.348and 0.369,respectively.They were significant higher than 0.240 in the healthy control group (all P＜0.05).Conclusions The A allele of -455G/A and the T allele of -148C/T were associated with AF with cerebral infarction and AF.
RESUMO
BACKGROUND: Human apolipoprotein H which characterizes by polymorphism is related to metabolism of triacylglycerol (TG) and function of platelet; therefore, it is suspected that it is possibly related to coronary atherosclerotic heart disease (CAHD).OBJECTIVE: To investigate the correlation among apolipoprotein H(ApoH) exon-8 polymorphism with CAHD and its effect on lipometabolism.DESIGN: Case-controlled observation.SETTING: Department of Cardiology, Haici Medical Group, Qingdao,Shangdong. PARTICIPANTS: 110 CAHD patients selected from Qingdao Haici Medical Group were regarded as CAHD group, and other 100 healthy subjects were regarded as control group.METHODS: 2 mL blood was collected from peripheral vein of all cases. Polymerase chain reaction and technique of restriction fragment length polymorphism were used to determine the genotype of ApoH exon-8; meanwhile, lipids were measured with oxidase technique.MAIN OUTCOME MEASURES: ① polymorphism of ApoH exon-8 genotype; ② gene frequency of ApoH exon-8 (Try316Ser); ③ comparisons of lipid level of cases with various genetypes.RESULTS: All 210 cases were involved in the final analysis. ① G1025C (Try316Ser) existed in ApoH exon-8, including types of GG and GC, butnot CC type. ② The frequency of GC in the CAHD group was 25.5％, and the frequency of C allele was 0.13; they were significantly higher than those in control group (10％, 0.05, P ＜0.05). ③ TG level in genotype GC of CAHD group was significantly higher than that both in GG genotype and in any genotype of control group [(1.38±0.24), (1.16±0.10),(1.09±0.78), (1.12±0.76) mmol/L, P ＜ 0.05]. Level of low-density lipoprotein cholesterol (C-LDL) was higher in CAHD group than that in control group (P＜0.05).CONCLUSION: The polymorphism of ApoH exon-8 is closely related to CAHD and TG level.