凝血酶激活的纤溶抑制物及其编码基因CPB2(Thr325Ile)多态性与心肌梗死关系的研究  被引量:3

Association of thrombin activatable fibrinolysis inhibitor and its encoding gene CPB2 (Thr325Ile) polymorphism with myocardial infarction

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作  者:徐成伟[1] 王丽丽[1] 杜贻萌[2] 赵敬杰[3] 姜翠英[1] 吴晓本[1] 

机构地区:[1]山东大学第二医院检验科,济南250033 [2]山东大学第二医院心内科,济南250033 [3]山东大学第二医院分子生物学实验室,济南250033

出  处:《中华检验医学杂志》2007年第9期1013-1016,共4页Chinese Journal of Laboratory Medicine

摘  要:目的探讨凝血酶激活的纤溶抑制物(TAFI)及其编码基因单核苷酸多态性与心肌梗死的关系。方法应用聚合酶链反应-限制性内切酶片段长度多态性分析技术(PCR-RFLP)检测了100例心肌梗死(MI)患者和90名正常对照者的 CPB2基因多态性,同时应用发色底物法和 ELISA 法分别测定了 TAFI 的活性及抗原,并进一步分析了基因多态性与 TAFI 的活性及抗原之间的关系。结果 MI 组 TAFI 的活性及抗原[TAFI Act(51.4±9.3)μg/ml,TAFI Ag(145.6±33.5)%]均较对照组[TAFI Act(25.7±5.6)μg/ml,TAFI Ag(76.5±24.8)%]显著增高(t=22.927 2,P<0.000 1;t=16.012 7,P<0.000 1);CPB2基因的3种基因型(Thr325Thr、Thr325Ile、Ile325Ile)频率在 MI 组和对照组分别为32例(32%)、53例(53%)、15例(15%)和31例(34.4%)、49例(54.4%)、10例(11.2%),等位基因 C、T 频率在 MI 组和对照组分别为117例(58.5%)、83例(41.5%)和111例(61.7%)、69例(38.3%)两组之间基因型及等位基因频率分布差异无统计学意义(基因型频率分布 x^2=0.648 2,P=0.723 2;等位基因频率分布 x^2=0.395 8,P=0.529 2),且均符合 Hardy-Weinberg 平衡定律;在心梗组和对照组不同的基因型对 TAFI 活性没有影响(心梗组 F=0.24,P=0.784 7;对照组 F=0.80,P=0.453 5),而对 TAFI 抗原含量的影响,则以 Thr325Thr 基因型者血浆 TAFI 抗原浓度最高,TIle325Ile 型最低,Thr325Ile 型介于两者之间(F=36.33,P<0.000 1;F=6.76,P<0.000 1)。结论TAFI 具有抑制纤溶的作用,可能是心肌梗死的危险因子。但 CPB2基因(Thr325Ile)的基因多态性与心肌梗死没有明显关系。Objective To evaluate the association of thrombin activatable fibrinolysis inhibitor (TAFI) and its encoding gene CPB2 polymorphism with myocardial infarction. Methods CPB2 gene (Thr325Ile) polymorphism were typed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in patients of myocardial infarction( n = 100) and a control group( n =90). The antigen(Ag) and the activity (Act) of TAFI were determined by ELISA and chromogenic assay respectively. The relationship between Thr325Ile gene polymorphism and TAFI Ag and Act were also analyzed. Results In MI group TAFI Ag and Act[ TAFI Act ( 51.4 ~ 9. 3 ) μg/ml, TAFI Ag ( 145.6 ±33.5 ) % ] were significenfly higher than those of control group[TAFI Act (25.7 ± 5.6) μg/ml, TAFI Ag (76.5 ± 24.8)%] (t =22. 927 2,P 〈 0. 000 1 ; t = 16. 012 7, P 〈 0. 000 1 ) ; The genetyping ( Thr/Thr, Thr/Ile, He/Be) frequencies of Thr325Ile were 32 ( 32% ), 53 ( 53% ), 15 ( 15% ) and 31 ( 34. 4% ), 49 ( 54. 4% ), 10 ( 11.2% ) and allelic frequeneies( C and T) were 117 ( 58.5% ), 83 ( 41.5% ) and 111 ( 61.7% ), 69 (38.3%) in MI group and contral group respectively,x2 analysis showed non-significant difference in the Thr325Ile polymorphism distributions (χ^2 =0. 648 2,P =0. 723 2;)(2 =0. 395 8,P=0. 529 2) ;Genotype and alleles distribution was in accordance with Hardy-Weinberg equilibrium. In MI group and contral group TAFI Ag was affected by TAFI genotype ( F = 36. 33, P 〈 0. 000 1 ; F = 6.76, P 〈 0. 000 1 ) but TAFI Act was not ( F = 0. 24, P = 0. 784 7 ; F = 0. 80, P = 0. 453 5 ). Conclusion TAFI plays an important role in antifibrinolysis,may be a risk factor to myocardial infarction,but the Thr325Ile polymorphism was not associated with myocardial infarction.

关 键 词:凝血酶激活的纤溶抑制物 基因 心肌梗死 

分 类 号:R542.22[医药卫生—心血管疾病]

 

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