血小板糖蛋白Ⅰbα Kozak基因多态性与脑梗死的相关性

最近一些研究证实了血小板糖蛋白（GP）Ⅰbα基因多态性和动脉血栓性疾病关系密切,GP Ⅰbα基因多态性可能是动脉血栓性疾病的一个遗传危险因素 .我们应用等位基因特异性聚合酶链反应（PCR）扩增和基因序列测定技术,研究在青岛地区汉族人群中GP Ⅰbα Kozak等位基因T/C多态性与脑梗死是否有相关性,报道如下.     

纤维蛋白原β-148C/T基因多态性与脑梗死关系的研究

目的研究中国雷州半岛地区汉族人群纤维蛋白原(Fibrinogen,Fg)β-148C/T基因多态性与脑梗死的关系。方法采用病例-对照研究,应用聚合酶链反应-限制性酶切片段长度多态性分析方法(PCR-RFLP)检测Fgβ-148C/T基因多态性,分析其在正常人群及脑梗死(cerebrol infarction,CI)患者中的频率分布特点及与缺血性脑卒中的关系;同时,用比浊法测定Fg水平,分析Fgβ-148C/T多态性与血浆Fg水平的关系。结果CI组β-148C/T位点T等位基因频率为0.303,对照组为0.219,两组比较差异有显著性意义(P<0.05),携带-148T等位基因者患脑梗死的危险性是非携带者的2.058倍(OR=2.058,95%CI:1.184~3.577,P=0.01);CI组β-148C/T基因多态性与Fg浓度(S)存在相关关系。结论Fgβ-148C/T基因多态性可影响血浆Fg水平,其T等位基因是CI的遗传易感因素。     

湖南汉族人群ApoA5基因T-1131C多态性分布及其与脑梗死的关系

目的探讨载脂蛋白A5(ApoA5)基因T-1131C多态位点在湖南地区汉族人群中的分布及其与脑梗死和血脂的关系。方法我们收集200例正常对照组和153例脑梗死患者血标本,用聚合酶链反应-限制性片段长度多态性分析法检测ApoA5基因T-1131C多态性在脑梗死组和正常对照组的基因频率。同时检测研究对象的血脂和脂蛋白水平。结果中国湖南地区人群存在ApoA5基因T1131C多态性,在正常对照组中T/C等位基因频率是0.717/0.283,脑梗死组ApoA5T-1131C等位基因频率显著低于正常对照组,差异有统计学意义(P<0.05),C等位基因携带者的TG,LDL水平显著高于对照组,差异有统计学意义(P<0.05)。结论ApoA5基因多态性可能参与血脂代谢,并与中国湖南汉族人群脑梗死的发生相关。     

血小板膜糖蛋白Ⅱb与脑梗死的关系

目的探讨湛江地区汉族人群脑梗死发生与血小板糖蛋白(glycoprotein,GP)Ⅱb的关系.方法采用病例-对照研究,应用聚合酶链反应-限制性酶切片断长度多态性分析方法(polymerasechain reaction-restrictionfragmentlength polymorphism,PCR-RFLP)方法检测血小板GPⅡb HPA-3基因多态性,流式细胞仪检测GPⅡb(CD41)受体的表达.结果脑梗死组HPA-3 b等位基因的频率高于对照组(0.6310.551 P＜0.005);脑梗死组GPⅡb平均表达百分数较对照组增高[(24.27±12.33)(13.49±8.76),P＜0.05)],2组中携带HPA-3b等位基因者GPⅡb受体表达较非携带HPA-3b者增高,差异有显著性(P＜0.05).Logistic多因素回归分析显示血小板膜GPⅡb HPA-3b等位基因为脑梗死发生的独立危险因素(P＜0.05,OR=2.885,95%CI1.135～8.307).结论血小板膜GPⅡb基因多态性影响GPⅡb受体的表达且与脑梗死的发生相关联,GPⅡb可能为脑梗死发生的1种遗传易感性标志.     

白细胞介素6基因多态性与动脉粥样硬化性脑梗死的关系

目的探讨IL-6-572C/G基因多态性与中国湖南地区汉族人群动脉粥样硬化性脑梗死(atherosclerotic cerebral infarction,ACI)的关系。方法在湖南汉族人群中筛选199例脑梗死患者为脑梗死组,196名健康体检者为对照组,采用聚合酶链反应-限制性片段长度多态性(polymerase chain reaction-restriction fragment length poly-morphism,PCR-RFLP)方法测定IL-6-572C/G基因多态性。结果脑梗死组与对照组间比较,IL-6-572C/G基因型分布存在统计学差异(2=5.120,P<0.05),IL-6-572C/G基因C和G等位基因频率也存在统计学差异,(C和G等位基因频率,脑梗死组为0.741、0.259,对照组为0.816、0.184)(2=5.491,P<0.05)。G等位基因携带者发生脑梗死的风险是C等位基因的1.552倍(OR=1.552,95%CI:1.092-2.315)。结论 IL-6-572C/G基因多态性与ACI发病有关,可能是中国湖南地区汉族人群ACI发病的遗传易感基因。     

血小板膜糖蛋白受体ⅠbαKozak序列基因多态性与缺血性脑血管病相关性的研究

目的 研究GPⅠbα Kozak序列基因多态性与缺血性脑血管病的相关性.方法 本研究采用聚合链式反应对正常对照组228例和缺血性脑血管病组232例进行研究,对所得结果进行统计学处理,得出GP Ⅰ bαKozak序列基因多态性与缺血性脑血管病的相关性.结果 缺血性脑血管病组Kozak序列C等位基因(TC 33.4%,CC 4.3%)的比例达到37.7%.对照组C等位基因(TC 21.2%,CC 21.8%)的比例为23%,经卡方检验,两组比较,χ2=17.378,df=1,P=0.03,具有显著性差异.Kozak序列C等位基因脑栓塞组21.6%;腔梗组28.1%;大面积梗塞组36.3%;对照组与脑栓塞组比较,χ2=3.086,df=1,P=0.079,没有显著性差异.与腔梗组比较χ2=1.854,df=1,P=0.173,没有显著性差异.与大面积梗塞组比较χ2=4.293,df=1,P=0.038,有显著性差异.结论 血小板膜糖蛋白受体Ⅰ b α Kozak序列基因多态性与缺血性脑血管病明显相关.     

粤西汉族人群血浆谷胱甘肽过氧化物酶基因启动子区-723C/T基因多态性与脑梗死的关系

目的 研究粤西汉族人群谷胱甘肽过氧化物酶(GPX-3)基因启动子区-723C/T基因多态性的分布及其与脑梗死的关系. 方法 检测佛广东医学院附属医院神经科自2007年2月至2008年2月收治的粤西地区汉族脑梗死患者102例(病例组)和同期粤西地区汉族健康体检者101例(对照组)的GPX-3基因启动子区-723C/T基因多态性,比较2组的一般资料、卒中危险因素及-723C/T基因多态性的分布特点,多元Logistic回归分析影响脑梗死发生的危险因素,并对筛选出的危险因素进行分层分析. 结果 与对照组比较,病例组高血压、糖尿病病史比例,血糖水平,-723C/T CC基因型频率及C等位基因频率均较高,差异有统计学意义(P＜0.05);多元Logistic回归分析显示-723C/T基因型、高血压病史、糖尿病史是脑梗死发生的独立危险因素;与没有任何危险因素亦不携带风险基因型者比较,有危险因素又携带CC基因型者脑梗死发病风险明显增加,差异有统计学意义(P＜0.05). 结论 中国粤西地区汉族人群GPX -3基因启动子区-723C/T位点存在多态性,C等位基因是脑梗死的危险因素,CC基因型为脑梗死的易感基因型,也是独立危险因素.     

TAFI基因编码区C291T的多态性与脑梗死的相关性研究

目的 探讨中国汉族人群中凝血酶激活的纤溶抑制物(TAH)基因编码区C291T的多态性与脑梗死的相关性.方法 采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术检测173例脑梗死患者(脑梗死组)和158例健康人(对照组)的TAFI基因编码区C291T多态性的基因型.结果 脑梗死组TAFI基因C291T多态性的CC基因型为53.2%(92/173),T等位基因携带者为46.8%(81/173);而对照组CC基因型为68.4%(108/158),T等位基因携带者为31.6%(50/158),两组之间的差异有统计学意义(χ2=7.952,P=0.005).脑梗死组C、T等位基因频率分别为70.8%(245/346),29.2%(101/346);对照组C、T等位基因频率分别为81.9%(259/316),18.1%(57/316),两组之间的差异有统计学意义(χ2=11.306,P=0.001).结论 TAFI基因编码区C291T的多态性与脑梗死呈显著性相关.     

血小板膜糖蛋白Ⅰbα VNTR基因多态性与脑梗死的相关性研究

目的探讨血小板膜糖蛋白（GP）Ⅰb基因α链变数串联重复序列（VNTR）的等位基因和基因型在中国北方人群中的分布规律,并深入研究这种多态性与脑梗死的相关性。方法共收集105例脑梗死病人和100例对照者,用聚合酶链反应和限制性片段长度多态性分析（PCR-RFLP）的方法确定其基因型。结果共发现CC、DD纯合子基因型和CD、BD、BC杂合子基因型,未发现AA基因型。脑梗死组和对照组的BC基因型频率分别为0.067和0.01,B等位基因频率分别为0.057和0.01,差异均有统计学意义（P〈0.05）。脑梗死组的BC基因型频率和B等位基因频率显著高于对照组（P=0.036,OR=7.071,95%CI 0.85～58.55;P=0.023,OR=3.98,95%CI 1.106～14.32）。结论血小板膜糖蛋白GPⅠbα（VNTR）基因多态性可能是脑梗死的一个危险因素。     

血小板膜糖蛋白Ⅲa PIA基因多态性与脑梗死的相关性研究

血小板膜糖蛋白（GP）Ⅱb／Ⅲa复合物（Ⅱbβ3）是细胞黏附分子整合素家族的一员，是血小板表面最丰富的整联蛋白，活化状态下，能表达多种血小板受体功能，在血小板聚集中起着关键作用。自1996年Weiss等率先研究发现GPⅢa的PIA2等位基因与心肌梗死（MI）发生相关以来，国内外对GPⅢaPIA等位基因与血栓性疾病的关系进行了大量的研究。我们应用病例一对照研究方法，对中国雷州半岛地区汉族人群GPⅢa的PIA多态性在脑梗死患者中的相关危险性进行探讨，现将结果报告如下。     

Platelet glycoprotein Ibalpha polymorphisms modulate the risk for myocardial infarction

Platelet glycoprotein Iba (GPIba) gene polymorphisms have been reported to affect the risk of developing coronary heart disease. Here, within the GPIba gene, we determine the association between the variable number of tandem repeats (VNTR), the -5C/T Kozak sequence dimorphism, and the human platelet antigen (HPA)-2 polymorphisms with occurrence of myocardial infarction (MI). Patients (n=180) presenting survivors of MI were compared to 180 controls matched by age, gender, and race. Carriers of VNTR-CD genotype had a 2-fold higher risk for MI compared to controls. The prevalence of VNTR-BC was lower among patients than among controls (P=.007). These data are in agreement with recent reports of increased plug formation by human platelets containing VNTRCD but no other VNTR genotypes. Among patients, the number of vessels severely occluded was greater among carriers of the D-allele (P=.019) or VNTR-CD (P=.026) and lower among carriers of the C-allele (P=.003) or VNTR-CC (P=.0009) compared to non-carriers of these alleles. No influence was seen with the Kozak or HPA-2 polymorphisms. Determination of VNTR of the GPIba gene may prove useful for identifying high-risk individuals for MI.     

Platelet glycoprotein Ia C807T, Ib C3550T, and IIIa Pl(A1/A2) polymorphisms and ischemic stroke in young Taiwanese

Platelet plays a pivotal role in the pathogenesis of thrombotic cardiovascular diseases. Recently, the polymorphism of platelet glycoprotein (GP) genes has been reported to be associated with an increased risk for ischemic stroke. The purpose of this study is to evaluate the association between platelet GP genetic variants and ischemic stroke in young Taiwanese. We conducted a case-control study in 157 young ischemic stroke patients recruited between September 2001 and March 2003 and 157 age- and sex-matched controls. The genotypes of platelet GP Ia C807T, GP Ib C3550T, and GP IIIa Pl(A1/A2) polymorphisms were analyzed by polymerase chain reaction-restriction fragment length polymorphism. Student's t-test, chi-square test, and logistic regression modeling were used for data analyses. The GP Ia C807T CC, CT and TT genotype frequencies were similar between patients (50.3%, 43.9%, 5.7%) and controls (53.5%, 38.9%, 7.6%; p=0.58). There were no significant differences in GP Ib C3550T CC and CT genotype distributions between patients (91.1%, 8.9%) and controls (91.7%, 8.3%; p=0.84). Of all subjects, none carries GP IIIa Pl(A2) mutation. In conclusion, platelet GP Ia C807T and GP Ib C3550T polymorphisms in our population are less common compared with Caucasians, and GP IIIa Pl(A1/A2) genetic mutation is not found, and all of them are not associated with ischemic stroke in young Taiwanese.     

Relationship between the -455G/A and -148C/T polymorphisms in the beta-fibrinogen gene and cerebral infarction in the Xinjiang Uygur and Han Chinese populations

We sought to investigate the correlation between the -455G/A and -148C/T polymorphisms of the β-fibrinogen gene and plasma fibrinogen levels in patients with cerebral infarction and in healthy subjects among the Xinjiang Uygur and Han Chinese populations, by using polymerase chain reaction-restriction enzyme digestion analysis. Results showed that there were no statistically significant differences in the distributions of the -455G/A genotype and allele frequency between the Uygurs and the Han. Plasma fibrinogen levels in cerebral infarction patients among the Uygurs and the Han were higher than those among healthy subjects. In particular, the frequencies of the -455G/A AA and -148C/T TT genotypes were significantly higher than in healthy subjects. Individuals carrying the A or T allele had a higher incidence of cerebral infarction compared with those carrying the G or C allele. Our experimental findings indicate that the -148C/T and -455G/A polymorphisms are associated with cerebral infarction in Xinjiang Uygur and Han Chinese subjects. The susceptibility- conferring alleles are -148T and -455A, and the susceptibility-conferring genotype is -455G/A + AA.     

基质金属蛋白酶9基因多态性与脑梗死的关系研究

目的：探讨基质金属蛋白酶9（MMP-9）启动子区C-1562T的基因多态性与脑梗死的关系。方法：用聚合酶链反应-限制性片段长度多态性（PCR-RFLP）技术检测224例脑梗死患者（脑梗死组）和112例同期健康体检者（对照组）的MMP-9启动子区的1562C/T的基因多态性,并进行基因测序,检测MMP-9C-1562T的基因型。结果：脑梗死组MMP-9基因的1562C/T的基因多态性出现频率（16.96%）与对照组（17.86%）无明显差异。结论：MMP-9基因C-1562T的基因多态性与脑梗死无相关性。     

TAFI基因编码区的单核苷酸多态性与脑梗死的相关性探讨

目的　凝血酶激活的纤溶抑制物 (Thrombinactivatablefibrinolysisinhibitor ,TAFI)具有抑制纤维蛋白溶解的功能 ,它在止血中起重要的作用。TAFI的血浆浓度是受TAFI基因变异调节的 ,因此TAFI基因可能是脑梗死的候选基因之一。探讨TAFI基因单核苷酸的多态性与脑梗死的关系。方法　收集了 189例尸体检查的样本 ,其中包括 95例脑梗死和 94例的对照组。TAFI基因G5 0 5A和C10 4 0T的基因型是用PCR -RFLP(Restrictionfragmentlengthpolymorphism)法来分析。 结果　G5 0 5AandC10 4 0T的基因型频率分布是A5 0 5A 12 (6 % ) ,G5 0 5A 75 (4 0 % ) ,G5 0 5G 10 2 (5 4 % ) ;C10 4 0C 139(74 % ) ,C10 4 0T 4 5 (2 3% ) ,T10 4 0T 5 (3% )。在脑梗死组和对照组之间 ,这些基因型的分布没有显著性差别 (P >0 .0 5 )。结论　TAFI基因单核苷酸的多态性 (G5 0 5A和C10 4 0T)与脑梗死没有显著性相关。     

血小板糖蛋白HPA-1和HPA-2基因多态性与脑血栓形成的相关性研究

目的探讨血小板糖蛋白人类血小板同种异型抗原系统-1(HPA-1)和HPA-2基因多态性与脑血栓形成的相关性。方法收集脑血栓形成患者108例及无神经系统疾病的日常查体者166例,应用聚合酶链反应-限制性片段长度多态性技术(PCR-RFLP)检测HPA-1、HPA-2多态性在两组中的分布频率。结果血小板糖蛋白基因HPA-1、HPA-2多态性在脑血栓组和对照组中的基因型频率和等位基因频率分布差异无统计学意义。结论血小板糖蛋白基因HPA-1、HPA-2多态性与脑血栓形成无相关性。     

Association of C807T, Pl(A), and -5 C/T Kozak genotypes with density of glycoprotein receptors on platelet surface

This study investigates whether three platelet glycoprotein (GP) polymorphisms, C807T in GP Ia, Pl(A1/A2) in GP IIIa, and -5 T/C Kozak in GP Ibalpha gene, influence the density of the three important adhesion and activation receptors on the platelet surface. Fifty-four healthy donors were genotyped according to the three polymorphisms, and densities of the corresponding GPs were measured by flow cytometry. Our study confirmed the association between C807T polymorphism and platelet surface expression of GP Ia-IIa and GP Ia and demonstrated that the density of GP Ibalpha or GP IX is not associated with the Kozak polymorphism. Although the Pl(A1/A2) polymorphism did not affect the expression of GP IIb-IIIa and GP IIIa on the platelet surface, flow-cytometric analysis employing murine monoclonal antibody SZ21 against GP IIIa can be applied to distinguish Pl(A1/A1) and Pl(A1/A2) polymorphism.     

ABCB1基因多态性与中国汉族人群动脉粥样硬化性血栓性脑梗死的相关性研究

目的探讨ATP结合盒B亚家族成员1转运蛋白(ABCB1)基因多态性与中国汉族人群动脉粥样硬化性血栓性脑梗死(ATCI)患者的关系。方法选取392例ATCI患者(脑梗死组)和429例健康对照者(对照组),通过SNa Pshot方法对ABCB1基因的rs1128503和rs1045642位点进行SNP检测。比较两组的基因型和等位基因分布频率,分析基因型与临床表型的关系。结果脑梗死组rs1128503和rs1045642位点的基因型及等位基因分布频率与对照组比较,无统计学意义(P0.05)。女性ATCI患者的rs1128503位点TT基因型和CC基因型体重指数高于TC基因型(P=0.007,P=0.011)。女性ATCI患者的rs1045642位点CC基因型低密度脂蛋白-胆固醇水平高于CT基因型(P=0.030)。结论 ABCB1基因多态性与中国汉族人群ATCI的发病无明显相关性。rs1128503位点多态性可能与女性ATCI患者的体重指数有关,rs1045642位点多态性可能与女性ATCI患者的低密度脂蛋白-胆固醇水平有关。     

Lack of association between the platelet glycoprotein Ia C807T gene polymorphism and myocardial infarction in Japanese. An approach entailing melting curve analysis with specific fluorescent hybridization probes

The platelet-collagen receptor, glycoprotein Ia/IIa (integrin alpha2beta1) plays a fundamental role in the adhesion of platelets to fibrillar collagen, an event leading to platelet activation and thrombus formation and contributing to the pathogenesis of thrombotic disease. Further, glycoprotein Ia/IIa receptor density and function may be associated with two linked and silent polymorphisms (807C/T and 873G/A) within the glycoprotein Ia gene. We tested the extent to which these polymorphisms serve as genetic markers of myocardial infarction in a Japanese population. A case-control study was carried out using 210 Japanese myocardial infarction patients and 420 age- and sex-matched controls. Genotyping was accomplished using PCR followed by melting curve analysis with specific fluorescent hybridization probes. The 807CC, CT, TT genotypes linked perfectly to the 873GG, GA, AA genotypes, respectively. Allele frequencies of the 807T (873A) variant were similar in the control and patient groups (0.373 vs. 0.352). The 807T and 873A variants of platelet glycoprotein Ia gene are common and in a perfect linkage in the Japanese population, but it appears unlikely that the 807T (873A) variant represents a useful marker of increased risk for myocardial infarction.