纤维蛋白原及相关基因多态性与脑梗塞类型的关系

目的 研究纤维蛋白原（fibrinogen，Vg）浓度、分子聚合功能及FgBβ—148、448基因多态性与脑梗塞类型的关系。方法 采用病例对照研究，应用聚合酶链反应-限制性酶切法进行基因多态性分析，并测定血浆Fg浓度及其分子聚合功能参数。结果 FgBβ-148变异基因型人群脑动脉主干支梗塞组血浆Fg浓度高于脑动脉穿通支梗塞组及对照组；448变异基因人群脑动脉主干支梗塞组Fg浓度、纤维蛋白单体聚合速率／最大吸光度、纤维蛋白单体聚合速率高于对照组，Fg浓度高于脑动脉穿通支梗塞组。结论 FgBβ-148、448基因型发生变异后可通过影响Fg浓度而使此人群发生脑动脉主干支梗塞组的危险性升高。

Correlation between fibrinogen polymorphisms and the type of cerebral infarction

OBJECTIVE: To study the association of beta-fibrinogen(Fg) gene -148 C/T and 448 G/A polymorphisms, plasma Fg concentration, molecular reactivity and the type of cerebral infarction. METHODS: Gene polymorphisms were analyzed by polymerase chain reaction-restriction fragment length polymorphism. The plasma Fg concentration and the molecular reactivity were also determined. RESULTS: The Fg concentration in MCI patients with T -148 allele was higher than that in PCI patients and controls. The MCI patients with A448 allele had higher Fg concentration, FMPV and FMPV/Amax when compared with controls, and had higher FMPV/Amax when compared with PCI patients. CONCLUSION: FgB beta -148 and 448 mutational genotypes have impact on Fg concentrationì and therefore increase the risk of MCI.