安徽地区汉族人血小板膜糖蛋白Ia-807基因多态性与脑梗死的关系研究

目的 通过检测脑梗死患者及对照人员的血小板膜糖蛋白(GP)Ia-807基因多态性,探讨该多态性与脑梗死发病的关系.方法 应用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)方法检测128例脑梗死及128例正常人的GP Ia C807T基因型.结果 在安徽地区汉族人群中,脑梗死组血小板膜糖蛋白Ia基因T807等位基因频率显著高于都有对照组(χ2=4..34,P＜0.05).结论 在安徽汉族人中,血小板膜GP Ia T807等位基因可能是脑梗死病人的遗传危险因素.     

血小板膜糖蛋白IαC807T基因多态性与非致命性心肌梗死的相关性

目的 :探讨血小板膜糖蛋白 (GP)IαC80 7T基因多态性与非致命性心肌梗死危险性之间相关性 .方法 :采用病例 对照研究 ,包括 10 0例心肌梗死患者及 110例具有相同民族的对照人群 ;采用等位基因特异性多聚酶链式反应对GPIαC80 7T基因多态性进行检测 .结果 :在年龄小于 6 0岁的非致命性心肌梗死患者中 ,GPIαT80 7为其一独立的危险因素 (OR值 =2 .4 9,P <0 .0 5 ) ;在年龄大于 6 0岁患者中 ,高血压是一个独立的危险因素 ;高密度脂蛋白胆固醇是心肌梗死一个保护因素 .结论 :血小板表面胶原受体GPIα IIαT80 7等位基因可能对血栓性疾病的发病具有重要作用     

缺血性脑卒中与血小板膜糖蛋白Ⅰa基因转录区寡肽807多态性的关系

①目的　探讨血小板膜糖蛋白 (GP)Ⅰa转录区寡肽 80 7基因多态性与缺血性脑卒中 (CIS)的关系。②方法　应用PCR RFLP方法 ,检测 98例CIS病人及 6 0例正常人的GPⅠa转录区寡肽 80 7基因型。③结果　T等位基因与年龄≤ 6 0岁的CIS病人和高危CIS病人明显相关 (χ2 =4 .0 4、4 .37,P <0 .0 5 )。④结论　在中国人中 ,血小板膜GPⅠa转录区寡肽 80 7T等位基因可能是年轻CIS和高危CIS病人的独立危险因素。     

血小板膜糖蛋白多态性与血栓形成的关系

血管内皮损伤时,血小板通过以下3个分子机制粘附到内皮下结缔组织:血小板膜上的糖蛋白Ⅰ b-Ⅸ-Ⅴ复合物(Gp Ⅰ b-Ⅸ-Ⅴ)和已结合在胶原上的vWF结合;血小板上的糖蛋白IaⅡa(GP Ⅰ a-Ⅱa)直接与胶原结合;血小板上的糖蛋白Ⅰc-Ⅱa(GP Ⅰ c-Ⅱa)和纤维连接蛋白结合。血小板粘附后发生一系列生物化学反应如:释放ADP、在血小板表面生成凝血酶。ADP和凝血酶通过纤维蛋白原及其血小板膜糖蛋白受体(如GPⅡ     

血小板膜糖蛋白基因多态性与缺血性脑血管病

基因多态性是指人群中出现的遗传变异,它可表现为高度重复序列拷贝数的改变。血小板膜糖蛋白(GPs)基因多态性与人类血小板抗原(HPA)相关。HPA多态性以频率较高的表型作为a型,其次为b型。HPA表型不同是由于膜糖蛋白多肽链内某一个氨基酸被取代的结果,不同表型的个体其相应的GP功能都是正常的,因此血小板特异性抗原也是正常血小板膜糖蛋白多态性的一种表现,目前已有十种常见抗原编码的血小板膜糖     

血小板膜糖蛋白Ⅲa基因多态性与溃疡性结肠炎关系

目的：探讨血小板膜糖蛋白Ⅲa（GPⅢa）基因多态性与溃疡性结肠炎（UC）高凝状态的关系。方法：应用PCR-RFLP技术检测183例UC患者及126例正常人的GPⅢa的P1A的基因多态性。结果：所有患者和对照者均为P1A1/A1基因型,P1A2基因型未检出。结论：GPⅢa的基因多态性与UC的高凝状态无关。     

急性心肌梗死患者血小板膜凝血酶敏感蛋白及糖蛋白Ⅳ的分布

目的:探讨急性心肌梗死(AMI)后患者血小板膜表面凝血酶敏感蛋白(TSP)及糖蛋白Ⅳ(GPⅣ)分布状况。方法:用流式细胞仪测定AMI患者(10例)静息状态时及凝血酶(0．1U/ml,0．5 U/ml)激活时,血小板膜表面TSP及 GPⅣ分布状况,并与正常人(12 名)进行比较。结果:AMI 12－72 h,静息血小板和激活血小板膜表面TSP及GPⅣ均明显高于正常人(P＜0．05,P＜0．001);AMI 168 h激活血小板膜 TSP及 GPⅣ高于正常人(P＜0．05,P＜0．01),静息血小板膜TSP及GPⅣ与正常人差异无显著性(P＞0.05)。AMI静息血小板和激活血小板膜TSP与GPⅣ呈显著正相关(r＝0.383,P＜0.001)。结论:AMI发生后72h内血小板活性及反应性明显增高,血小板反应性持续增高达AMI后168h。     

定量测定45例血小板膜糖蛋白及其在急性脑梗死中的意义

目的:探讨流式细胞术定量测定血小板膜糖蛋白在急性脑梗死中的临床意义。方法:应用流式细胞仪测定静息状态和TRAP激活的血小板所结合单抗的分子数。结果:急性脑梗死患者血小板静息状态下GPⅢa和GPⅡb/Ⅲa密度[分别为(76.8±14.1)×103/血小板、(73.9±10.5)×103/血小板]高于健康对照组[分别为(55.6±5.8)×103/血小板、(50.5±4.1)×103/血小板,P<0.05],TRAP活化后患者血小板GPⅢa和GPⅡb/Ⅲa密度[分别为(102.6±16.4)×103/血小板、(108.5±16.7)×103/血小板]亦明显高于对照组[分别为(69.7±18.3)×103/血小板、(61.2±5.7)×103/血小板,P<0.01];患者血小板静息状态下,GMP-140表达与对照组比较没有显著性差异(P>0.05),而TRAP激活后患者血小板GMP-140表达[(1.21±0.41)×103/血小板]明显高于对照组[(0.87±0.26)×103/血小板,P<0.05];患者血小板静息和活化状态GPⅠb表达与对照组比较没有显著性差异(P>0.05)。结论:急性脑梗死患者血小板呈较为活化状态,血小板膜糖蛋白测定对病情的分析和疗效的判断有重要的临床参考价值。     

用单链构型多态性快速检测血小板膜糖蛋白Ⅱb和Ⅲa基因变异

为探讨快速检测血小板膜的糖蛋白和Ⅲａ基因点突变的方法，采用单链构型多态性分析研究正常人和血小板无力症患者血小板膜ＧＰⅢｂ，Ⅲａ基因结构。外周血ＤＮＡ提取后，用聚合酶链反主尖扩增各外显子，ＰＣＲ产物变性后在微型聚丙烯酰胺凝胶上分离，通过银染色对迁移率异常的ＰＣＲ产物进行核苷酸序列分析。     

Association of the platelet membrane glycoprotein I a C807T gene polymorphism with aspirin resistance

Summary To explore the correlation between the C807T polymorphism of platelet membrane glycoprotein I a (GP I a) gene and aspirin resistance in Chinese people, 200 patients with high-risk of atherosclerosis took aspirin (100 mg/d) for 7 days. Platelet aggregation function was detected using adenosine diphosphate (ADP) and arachidonic acid (AA) before and after the administration of aspirin. Then the subjects were divided into three groups according to the results of platelet aggregation function: an aspirin resistant (AR) group, an aspirin semi-responder (ASR) group and an aspirin-sensitive (AS) group. Platelet GP I a gene 807CT polymorphism was examined by means of polymerase chain reaction-sequence specific primers (PCR-SSP). The results showed that T allelic frequency in AR group and ASR group were higher that of AS group (P<0.005), and the prevalence of genotypes (TT+TC) of these two groups was significantly higher than that in AS group (P<0.05). Platelet GP I a T allele was significantly associated with aspirin resistance as revealed by multiple logistic regression (OR=3.76, 95% CI: 2.87–9.58). The results suggest that inherited platelet GP I a variations may have an important impact on aspirin resistance and the presence of GP I a T allele may be a marker of genetic susceptibility to aspirin resistance.     

Association of the Platelet Membrane Glycoprotein Ⅰ a C807T Gene Polymorphism with Aspirin Resistance

To explore the correlation between the C807T polymorphism of platelet membrane gly- coprotein Ⅰa (GPⅠa) gene and aspirin resistance in Chinese people, 200 patients with high-risk of atherosclerosis took aspirin (100 mg/d) for 7 days. Platelet aggregation function was detected using adenosine diphosphate (ADP) and arachidonic acid (AA) before and after the administration of aspi- rin. Then the subjects were divided into three groups according to the results of platelet aggregation function: an aspirin resistant (AR) group, an aspirin semi-responder (ASR) group and an aspi- rin-sensitive (AS) group. Platelet GPⅠa gene 807CT polymorphism was examined by means of po- lymerase chain reaction-sequence specific primers (PCR-SSP). The results showed that T allelic fre- quency in AR group and ASR group were higher that of AS group (P<0.005), and the prevalence of genotypes (TT TC) of these two groups was significantly higher than that in AS group (P<0.05). Platelet GPⅠa T allele was significantly associated with aspirin resistance as revealed by multiple logistic regression (OR=3.76, 95% CI: 2.87–9.58). The results suggest that inherited platelet GPⅠa variations may have an important impact on aspirin resistance and the presence of GPⅠa T allele may be a marker of genetic susceptibility to aspirin resistance.     

血小板膜糖蛋白Ibα基因VNTR多态性与冠心病相关性的研究

目的探讨我国河南汉族人群血小板GPIbα基因巨糖肽区串联重复序列(VNTR)多态性与冠心病的关系。方法选择404例确诊冠心病的患者和500例无心脏病史的健康体检者作对照,应用PCR方法进行VNTR多态性检测。结果扩增产物电泳显示,在中国河南汉族人群中,发现VNTR的6种基因型:AC、BC、BD、CC、CD、DD。本研究未发现VNTR各基因型及等位基因与冠心病的发生间存在明显相关性。P值均大于0.05。与其他基因型相比,在CD基因型中,Gensini冠状动脉评分≥40组与评分<40组间的差异具有显著性,P<0.05,OR=2.3(95%可信区间1.2～4.4)。结论血小板膜GPIbα基因巨糖肽区VNTR的CD基因型与冠心病的严重程度有关。     

TET2基因单核苷酸多态性与急性心肌梗死易感性的关系

目的 探讨TET2基因单核苷酸多态性（rs2454206、rs12498609）与急性心肌梗死易感性的相关性。方法 前瞻性选取2022年1月—2022年9月承德医学院附属医院收治的急性心肌梗死患者作为病例组,另选取同期该院健康人群作为对照组,每组150例。比较两组一般资料及血脂相关指标,采用实时荧光定量聚合酶链反应（q RT-PCR）检测TET2基因rs2454206、rs12498609位点基因型,采用多因素Logistic逐步回归分析影响急性心肌梗死发生的危险因素。结果 两组TET2基因rs2454206位点、rs12498609位点基因型频率、等位基因频率比较,差异均有统计学意义（P<0.05）。多因素Logistic逐步回归分析显示,高血压■、rs2454206位点AA基因型■、rs12498609位点CC基因型■是影响急性心肌梗死发生的危险因素（P<0.05),■]是影响急性心肌梗死发生的保护因素（P<0.05）。结论 急性心肌梗死的发生受多种因素影响,其中TET2基因rs2454206位点AA基因型、rs12498609位点CC基因型可能与急性心肌梗死易感...     

Association of G＋1688A Polymorphism of Platelet Endothelial Cell Adhesion Molecule-1 Gene with Myocardial Infarction in the Chinese Han Population

In order to investigate the association of G＋1688A （Ser563Asn） polymorphism of platelet endothelial cell adhesion molecule-1 （PECAM-1） gene with myocardial infarction （MI） in the Chinese Han population, the G＋1688A polymorphism in PECAM-1 gene was detected by polymerase chain reaction-restriction fragment-length polymorphism （PCR-RFLP） method among 502 subjects, including 218 patients with MI and 284 controls. The results showed that there was significant difference in AA frequencies of genotype G＋1688A polymorphism between case and control groups （39% vs 24%, P〈0.001）. A similar trend was observed on the allele frequencies （A/G： 62% vs 49%, P〈0.001）. Among the subjects with high serum total cholesterol level or high systolic blood pressure level, the variant AA genotype was associated with high risk of MI （adjusted OR, 2.13; 95% CI, 1.08 -4.41 and adjusted OR, 2.53; 95%CI, 1.63-3.63）. The single nucleotide polymorphism （SNP） at position ＋1688 in the exon 8 of PECAM-1 gene was associated with MI and the allele A might be a risk factor for MI in the Chinese Han population.