OX40L基因多态性与复发性流产相关性的研究

目的通过检测OX40L基因rs1234315、rs2205960、rs17568、rs2298212位点多态性基因频率,探讨这些位点与复发性自然流产之间的关系。方法采用EILSA方法检测65例复发性自然流产患者以及75例正常妊娠患者外周血血清IL-10、IL-2细胞因子;采用直接测序法检测上述患者OX40L基因rs1234315、rs2205960、rs17568、rs2298212等位点多态性。结果复发性自然流产组患者血清中IL-2水平(83.82±50.29pg/m L)显著高于正常妊娠组(66.42±30.64pg/m L)(P0.05);复发性自然流产组患者血清中IL-10(18.86±12.63pg/m L)显著低于正常妊娠组(24.96±9.42pg/m L)(P0.05)。两组OX40L基因rs1234315、rs2205960、rs17568多态性位点的基因型和等位基因频率均无统计学差异(P0.05):复发性自然流产组rs2298212基因A/A基因型频率显示高于正常妊娠组(P0.05),两组G/G基因型与G/A基因型无显著差异(P0.05)。结论 OX40L基因SNPrs2298212基因A/A基因型可能是复发性自然流产危险因素,需要进一步研究证实。     

广西壮族及汉族人群CD40配体基因rs3092923G/A和rs3092929A/C遗传多态性的研究

目的探讨CD40配体基因rs3092923G/A和rs3092929A/C多态性位点在广西壮族及汉族人群中的分布,同时比较其基因型及等位基因频率分布在不同种族人群之间以及同一种族不同性别之间存在的差异。方法采用单碱基延伸PCR的检测方法,分析201名广西汉族人和199名广西壮族人的CD40配体基因rs3092923G/A和rs3092929A/C多态性。结果在广西壮族人群中,CD40配体基因rs3092923G/A位点AA、AG与GG基因型频率和rs3092929A/C位点AA、AC与CC基因型频率均为86.4%、7.5%和6.0%,rs3092923G/A位点的A、G等位基因频率和rs3092929A/C位点的A、C等位基因频率均为90.2%、9.8%;在广西汉族人群中,CD40配体基因rs3092923G/A位点AA、AG与GG基因型频率和rs3092929A/C位点AA、AC与CC基因型频率均为93.0%、4.0%、3.0%,rs3092923G/A位点的A、G等位基因频率和rs3092929A/C位点的A、C等位基因频率均为95.0%、5.0%。将这2个多态性位点基因型分布频率在2个民族人群中比较,差异均无显著性(P均>0.05),而等位基因频率却有着显著性差异(P均<0.05)。另外,将这2个位点多态性分布频率在男女性别之间作比较,差异都没有显著性(P均>0.05)。进一步与人类基因组计划公布的4个人群相比,广西汉族人群的rs3092923G/A和rs3092929A/C 2位点基因型和等位基因频率与非洲、日本、欧洲和北京人群比较,差异都具有显著性(P均<0.05)。结论在广西地区壮族及汉族人群中存在着CD40配体基因多态性。广西汉族人群CD40配体基因多态性的分布频率同其他种族人群比较存在着显著性差异,这种差异可能是导致与CD40配体相关的疾病在不同种族人群间的临床表现以及发病率存在明显不同的原因之一。     

染色体12q24.31单核苷酸多态性与冠状动脉粥样硬化性心脏病遗传易感性的关联研究

目的 探讨中国西南地区汉族人群染色体12q24.31 rs2259816基因多态性与冠状动脉粥样硬化性心脏病(简称冠心病)的相关性.方法 收集592例经冠状动脉造影确诊的冠心病患者及同期冠状动脉造影阴性、排除冠心病诊断的463名正常对照,采用聚合酶链反应-限制性片段长度多态性(PCR-restriction fragment length polymorphism,PCR-RFLP)技术分析染色体12q24.31 rs2259816单核苷酸多态性,比较两组间rs2259816位点等位基因和基因型频率分布差异.结果 冠心病组与对照组中均检出AA、AC、CC基因型.rs2259816等位基因A在冠心病组的频率为49.5%,高于对照组的频率43.8%,两组差异有统计学意义(OR=1.129,95%CI:1.029～1.239,P=0.010).结论 中国西南地区汉族人群染色体12q24.31 rs2259816基因多态性与冠心病发生风险密切相关.     

广西汉族人群中缺氧诱导因子3A基因rs11672731和rs2072491 的多态性

目的 探讨缺氧诱导因子3A(HIF3A)在广西汉族人群中的分布特征,并比较它们与不同人群的分布差异.方法 我们对纳入本研究的286例广西人rs1 1672731和rs2072491位点采用单核苷酸多态性分型检测(SNPscan)技术进行基因分型检测,统计学分析基因型和等位基因频率与人类基因组单体型图(HapMap)公布的HapMap-CEU、HapMap-HCB、HapMap-JPT、HapMap-GIH 和 HapMap-MEX 数据间的差异.结果 rs1 1672731 位点存在AA、AG和GG 3种基因型,频率分布分别为42.7％、45.5％和 11.8％,A、G的等位基因频率分别为65.5％和34.5％;rs2072491位点存在CC、CT和TT 3种基因型,其分布频率分别为47.6％、43.0％和9.4％,C、T的等位基因频率分别为69.1％和30.9％.两个位点的基因型和等位基因频率与男女性别无关,差异均无统计学意义(P＞0.05).与来自HapMap的CEU、HCB、JPT、GIH、TSI和 MEX人群的基因分型资料比较,广西汉族人群基因型和等位基因频率与HCB和JPT数据比较差异均无统计学意义(P＞0.05);与HapMap公布的CEU、GIH、TSI和MEX人群数据相比,两位点的基因型和等位基因型频率与上述地区差异均有统计学意义(P＜0.05).结论 广西人群HIF3A基因rs11672731和rs2072491存在多态性,且在不同人群间存在不同程度差异.     

囊泡相关膜蛋白8基因多态性与冠状动脉粥样硬化性心脏病的相关性研究

目的 研究囊泡相关膜蛋白8(synaptobrevins/vesicle-associated membrane proteins 8,VAMP8)基因rs1010多态性在中国汉族人群中的分布及与冠状动脉粥样硬化性心脏病(简称冠心病)的相关性.方法 采用聚合酶链反应-限制性片段长度多态性技术,对汉族185例冠心病患者及149名正常人VAMP8 rs1010基因多态性,基因型及等位基因频率分布进行研究.结果 研究人群中存在VAMP8 rs1010基因多态性,基因型符合Hardy-Weinberg平衡,冠心病患者A等位基因频率显著高于对照组(67.3%VS 53.0%,P<0.05).Logistic回归分析得出:VAMP8基因(AA+AG)基因型是冠心病的独立危险因素,(AA+AG)基因型比GG基因型的比数比为1.969,95%可信区间为1.032～3.755.结论 VAMP8 rs1010基因多态性与冠心病有关,A等位基因可能是汉族人群冠心病的遗传危险因素.     

钠离子转运基因多态性及血清Na~+水平与朝鲜族女性原发性高血压相关性研究

目的探讨rs11643718、rs7187932、rs12447134和rs3743966位点多态性与血清Na~+与朝鲜族女性原发性高血压的相关性。方法对116例朝鲜族原发性高血压和109名朝鲜族健康者进行研究,运用LDR连接酶技术检测分析4个SNP位点多态性,全自动生化分析仪检测血清Na~+。结果朝鲜族女性原发性高血压组和正常对照组之间rs11643718高血压组和正常对照组GG基因型与GA和AA基因型频率及G,A等位基因频率分布差异有统计学意义(P0.01)。rs7187932、rs3743966位点高血压组和正常对照组基因型频率等位基因频率分布差异均无统计学意义(P0.05)。朝鲜族女性原发性高血压组和正常对照组之间血清Na~+水平差异无统计学意义(P0.05),而rs7187932位点对照组GG基因型组与高血压组GG基因型组及对照组GA+AA组血清比较Na~+水平差异有统计学意义(P0.05)。结论 rs11643718位点等位基因A是朝鲜族女性高血压的危险因素。rs7187932位点GG基因型组与血清钠离子水平正相关。     

1p13.3 rs599839单核苷酸多态性与早发冠状动脉粥样硬化性心脏病的关联研究

目的 探讨中国汉族人群染色体1p13.3 rs599839基因多态性与早发冠状动脉粥样硬化性心脏病(简称早发冠心病)的相关性.方法 用聚合酶链反应-限制性片段长度多态性技术分析303例经冠状动脉冠脉造影确诊的早发冠心病患者rs599839基因多态性,以同期冠脉造影阴性、排除冠心病诊断的312名受试者为财照组,比较两组间rs599839基因多态性频率分布差异.结果 早发冠心病组与对照组中均检出AA、AG基因型,GG基因型末检出.G等佗基因频率在早发冠心病组和对照组中分别为5.0%、9.1%,差异有统计学意义(P=0.004),使用Logistic回归分析排除吸烟、高血压、糖尿病等因素的影响后,两组G等位基因频率差异仍有统计学意义(P＜0.05).两组中G等位幕因携带者(AG型)低密度脂蛋白胆固醇(low density lipoprotein-cholesterol,LDL-C)水平均低于AA纯合子.结论 中国汉族人群染色体1p13.3 rs599839基因多态性可能与早发冠心病发病相关;rs599839基因多态性可能与血清LDL-C浓度差异相关;rs599839基因多态性与冠脉狭窄程度无关.     

中国甘肃汉/回族人群C1GALT1、DEFA基因多态性与IgA肾病易感性的关系北大核心CSCD

目的:探讨β-1,3-半乳糖基转移酶(C1GALT1)基因rs1008898位点及α防御素(α-defensin,DEFA)基因rs2738081位点多态性与中国甘肃省汉族人群和回族人群Ig A肾病易感性的关系,筛查预测Ig A肾病的分子标记。方法:本研究选取甘肃地区患Ig A肾病的汉族个体146例、回族个体83例作为实验组,另选取健康汉族个体180例、健康回族个体100例作为对照组。采用聚合酶链反应-限制性片段长度多态性(Polymerase chain reaction-restriction fragment length polymorphism,PCR-RFLP)方法以及PCR产物基因测序法对单核苷酸多态性基因位点进行基因分型,采用卡方检验比较各基因型、等位基因在病例组和对照组中的分布差异,评价各基因型、等位基因与Ig A肾病发病风险的关系。结果:(1)汉族Ig A肾病患者rs1008898位点的GG基因型频率与健康对照组之间有统计学差异(OR=2.489,95CI:1.259~4.922,χ~2=7.037,P=0.008),且G等位基因可能增加患Ig A肾病的风险(OR=1.268,95%CI:1.056~1.523,χ~2=6.709,P=0.01)。(2)回族Ig A肾病患者rs1008898位点的多态性与健康对照组之间差异无统计学意义(P>0.05)。(3)rs2738081位点多态性在汉族、回族Ig A肾病患者及其健康对照组之间的分布差异无统计学意义(P>0.05)。结论:rs1008898位点G等位基因可能增加甘肃地区汉族人群患Ig A肾病的风险。     

IRF5基因多态性与山东汉族人群系统性红斑狼疮的相关性研究

目的 研究山东地区汉族人群干扰素调节因子5(IRF5)基因rs2004640、rs10954213单核苷酸多态性,探讨其与系统性红斑狼疮(SLE)易感性之间的关系.方法 采用聚合酶链反应和限制性片段长度多态性等方法对92例SLE患者和88名健康对照IRF5基因rs2004640 G/T、rs10954213 G/A多态性进行分析,计算基因型和等位基因频率.结果 SLE患者IRF5 rs2004640GG、GT、TT基因型频率分别是0.198、0.521和0.281,与对照组比较差异有统计学意义(X2=8.73,P<0.05);SLE患者IRF5 rs10954213 GG、GA、从基因型频率分别是0.318、0.409和0.273,与对照组间差异有统计学意义(X2=6.36,P<0.05).结论 山东汉族人群IRF5基因位点rs2004640、rs10954213的多态性,可能与山东地区汉族人群SLE的易感性有关,需进一步累积更多数据证实.     

性激素结合球蛋白基因单核苷酸多态性在宁夏回、汉族人群中的分布特征

目的:探讨性激素结合球蛋白(SHBG)基因rs1799941、rs6257、rs6259和rs727428位点在宁夏回、汉族人群中及不同种族间的分布特征。方法:采用Taqman探针法分析宁夏回、汉族群体SHBG rs1799941、rs6257、rs6259和rs727428 4个SNP位点等位基因频率及基因型频率的分布特征。结果:宁夏回、汉族人群SHBG基因4个多态性位点基因型频率及等位基因频率差异无统计学意义。宁夏人群SHBG基因rs1799941、rs727428和rs6259位点基因型频率分布与人类基因组计划扫描所得欧洲人群及非洲人群比较,差异均有统计学意义,而与北京人群比较,差异无统计学意义。rs6257位点基因型频率分布与文献查询所得欧洲人群及土耳其人群比较差异均有统计学意义,而与中国南方人群比较差异无统计学意义。结论:SHBG基因rs1799941、rs6257、rs6259和rs727428 4个SNP位点等位基因及基因型频率在宁夏回、汉族及不同性别之间均无差异;但在不同种族间具有差异。     

ABCG1基因两个单核苷酸多态位点与冠状动脉粥样硬化性心脏病易感性及病情严重程度的相关性分析

目的 应用基于群体的病例-对照关联研究方法探讨ABCG1基因上的遗传多态性与冠状动脉粥样硬化性心脏病(简称冠心病)及病情严重程度的相关性.方法 在山东汉族人群中收集541例冠心病患者和649名正常对照,采用聚合酶链反应-限制性片段长度多态方法对ABCG1基因内两个单核甘酸多态位点进行基因分型,统计学分析.结果 rs225374等位基因C在病例组中的频率显著高于对照组(OR=1.186,95%CI:1.009～1.394,P=O.039),在男性病例组与对照组中的差异同样具有统计学意义(OR=1.236,95%CI:1.014～1.506,P=O.036).rs1044317等位基因A在病例组中的频率显著高于对照组(OR=1.187,95%CI:1.009～1.397,P=0.039).单独在病例组内的分析结果显示,rs225374等位基因C频率在高Gensini积分组中显著高于低Gensini积分组(OR=1.303,95%CI:1.024～1.657,P=O.031).结论 ABCG1基因上两个单核苷酸多态位点与冠心病易感性及病情严重程度具有一定相关性.     

二甲基精氨酸二甲基氨基酸水解酶基因多态性与冠心病的相关性研究

目的:研究中国人群二甲基精氨酸二甲基氨基酸水解酶(DDAH)基因单核苷酸多态性(SNP)与冠状动脉性心脏病(coronary heart disease,CHD)的关系。方法:从山西医科大学第二医院选取冠心病患者165例和匹配的对照组192例。并记录所有研究对象的病史、体格检查等临床资料及其它流行病学资料,采取聚合酶链式反应和限制性酶切片段长度多态性分析方法(PCR-RFLP)检测各组DDAH2基因rs805305位点C/G的基因型并统计各组的基因型频率。用连接酶检测反应(LDR)-测序分型方法检测各组基因rs2272592位点G/A的基因型并统计各组的基因型频率。结果:冠心病组rs805305和rs2272592基因型频率与对照组之间相比较均无显著差异(P0.05)。并在校正了年龄、性别、高血压史、糖尿病史、甘油三酯和胆固醇等传统危险因素的影响后,这种相关性依然不存在。结论:DDAH2基因rs805305位点C/G多态性和rs2272592位点G/A多态性可能与中国人群冠心病发病不相关。     

Association between lipoprotein-associated phospholipase A2 gene polymorphism and coronary artery disease in the Chinese Han population

The role of the lipoprotein-associated phospholipase A(2) gene (PLA2G7) in atherosclerosis remains controversial. We investigated the frequency of single-nucleotide polymorphisms (SNPs) of PLA2G7 (rs16874954 and rs1051931) and their association with coronary artery disease (CAD) in a cohort of CAD patients (n= 806) and age-matched healthy controls (n= 482) in the Chinese Han population. The VF and FF genotype of rs16874954 was significantly more frequent in the CAD patients (13.5%) than in the controls (9.3%, P= 0.024). The association remained after adjustment for age, gender, body mass index, smoking status, history of diabetes, positive family history of CAD, high-density lipoprotein cholesterol, and triglyceride (OR = 1.922; 95% CI [1.146-3.224]; P= 0.013). There was no significant difference in the frequency of any genotype of rs1051931 between the two groups. However, the frequency of the allele V379 was significantly greater in CAD patients with a history of myocardial infarction (MI) than in those without a history of MI (18.7% and 14.8%, P= 0.038). We conclude that there is significant association between the rs16874954 mutation and CAD in the Chinese Han population. The expression of rs1051931 variant in CAD patients may entail increased risk of MI.     

PAI-1基因多态性与冠状动脉粥样硬化性心脏病患者预后的相关性研究

目的 研究汉族人群纤溶酶原激活物抑制物-1(plasminogen activator inhibitor-1,PAI-1)基因4G/5G多态性与冠心病(coronary artery disease,CAD)患者主要不良心脏事件(major adverse cardiovascular event,MACE)及冠脉病变严重程度的关联.方法 应用聚合酶链反应-限制性片段长度多态性分析155例冠心病患者及190名正常人PAI-l基因的4G/5G多态性,随访患者是否发生MACE,并分析PAI-1基因4G/5G多态性与冠脉病变的关联.结果 (1)冠心病组4G/4G型频率(58/155,37.42%)明显高于对照组(52/190,27.37%),差异有统计学意义(P＜0.01).(2)PAI-1基因4G/4G型频率在MACE组(40/81,49.38%)均明显高于无MACE组(18/74,23.42%),差异有统计学意义(P＜0.01);(3)冠心病患者中PAI-1基因4G/4G型频率在多支病变组(30/47,44.77%)明显高于单支病变组(9/37,24.32%),差异有统计学意义(P＜0.05).结论 携带PAI-l基因4G/4G基因型易患冠心病,易侵犯多支冠状动脉.     

Association of variants in CELSR2-PSRC1-SORT1 with risk of serum lipid traits,coronary artery disease and ischemic stroke

Recent genome-wide association studies (GWAS) have identified genetic variants associated with coronary artery disease (CAD), ischemic stroke (IS) and serum lipid traits in different ethnic groups. Some loci were found to affect the risk of CAD and IS. However, there were no data in the southern Chinese populations. Our study was to assess the association of CELSR2-PSRC1-SORT1 rs599839, rs464218 and rs6698443 SNPs and serum lipid levels and the risk of CAD and IS. The genotypes of 3 SNPs were detected in 561 CAD and 527 IS patients, and in 590 healthy controls. The genotypic and allelic frequencies of the rs599839 SNP were different between the controls and IS patients (P < 0.05). The minor G alleles of rs599839 and rs464218 SNPs were associated with higher high-density lipoprotein cholesterol concentrations in CAD and IS patients (P < 0.05); respectively. No association was found between the SNPs of rs599839, rs464218 and rs6698843 at the CELSR2-PSRC1-SORT1 and the risk of CAD or IS. These results will be replicated in the other Chinese populations.     

Single nucleotide polymorphisms of ERβ and coronary atherosclerotic disease in Chinese Han women

Background: Growing evidence has shown that with the increase of age, the incidence of coronary atherosclerotic disease (CAD) in women increases to equal that of men. Several studies on the single nucleotide polymorphisms [SNPs] seem to provide evidence in support of the protective role estrogen receptor β (ERβ) has in reducing the risk of CAD. Objective: To determine the association of ERβ SNPs rs1256049 RsaI 1082 A > G and rs4986938 AluI 1730 G > A with coronary atherosclerotic disease in Chinese Han women. Methods: We designed a nested case-control research, in which 120 case women and 30 control women were selected from the Forensic Medicine Department of Tongji Medical College, HUST. We isolated DNA from their lung paraffin blocks, and then screened for these two SNPs for each DNA sample. Post-statistical analysis of their genotypes and haplotypes was used to figure out the targeted association. Results: We found no significant difference between the genotypes or haplotypes of the two SNPs and the risk of CAD. However, the rs4986938 heterozygote AG variant was correlated with a significantly lower risk for CAD than did homozygote GG variant in the group of less than 40 years old. Haplotype AA of the two SNPs was correlated with a higher risk for CAD in the same group. Conclusion: The rs4986938 AluI 1730 G > A seems to be quite involved in the genetic basis of the disease and needs more attention in future studies. Meanwhile, this very association made between CAD and the mentioned SNP seems to be affected quite a bit by age.     

Scavenger Receptor Class B Type 1 Gene rs5888 Single Nucleotide Polymorphism and the Risk of Coronary Artery Disease and Ischemic Stroke: A Case-Control Study

Background: Our previous studies have showed that the rs5888 single nucleotide polymorphism (SNP) in Scavenger receptor class B type 1 (SCARB1) gene is associated with serum lipid levels in the general Chinese populations. The present study was undertaken to detect the associations between rs5888 SNP and the risk of coronary artery disease (CAD) and ischemic stroke (IS).Methods: A total of 1,716 unrelated subjects (CAD, 601; IS, 533; and healthy controls, 582) were included in this study. Genotyping of the rs5888 SNP were determined by polymerase chain reaction and restriction fragment length polymorphism.Results: The genotypic frequencies of SCARB1 rs5888 SNP were different between CAD patients and controls, the subjects with TT genotype had high risk of CAD (OR = 1.76, P = 0.038 for TT vs. CC; and OR = 1.75, P = 0.036 for TT vs. CC/CT). There was no significant association between genotypes and the risk of IS. Further analysis showed that the subjects with TT genotype in the total population had lower levels of high-density lipoprotein cholesterol than the subjects with CC/CT genotypes (P < 0.05), the subjects with TT genotype in controls but not in CAD or IS patients had higher levels of serum LDL-C and ApoB than those with CC genotype (P < 0.05 for each).Conclusions: The present study suggests that the SCARB1 rs5888 SNP influences serum lipid levels, and is associated with the risk of CAD.     

Candidate gene analysis of SPARCL1 gene in patients with multiple sclerosis

Recently, proteomic analysis in cerebrospinal fluid (CSF) from patients with MS identified four proteins which are present in MS but not in normal human CSF, including SPARCL1, an extracellular matrix-associated protein member of the SPARC family. One hundred eighty-six patients with MS and 185 age-matched controls were genotyped for A/G single nucleotide polymorphism (SNP) in exon 1 (rs1049539), C/G SNP in exon 4 (rs1049544), resulting in a substitution of an aspartate with an histidine, and A/G substitution in the exon 5 (rs1130643), leading to the substitution of alanine with threonine. No significant differences in either allelic or genotypic frequency of the three SNPs were found (P>0.05), even in stratifying MS patients according to the course of the disease. Stratifying according to gender, a trend towards a decreased frequency of the C/C genotype of the rs1049544 was observed in male patients as compared with male controls (30.2% versus 44.0%; P=0.217). Despite proteomic studies in CSF from MS patients suggested an important role for SPARCL1 in the development of the disease, SPARCL1 gene does not appear to act as susceptibility factor for MS in the population investigated here. However, the frequency of the C/C genotype of rs1049544 was decreased in male patients, possibly conferring a lower risk of developing MS in male population. Further studies are needed to clarify this issue.     

Four SNPS on Chromosome 9p21 Confer Risk to Premature, Familial CAD and MI in an American Caucasian Population (GeneQuest)

Genome-wide association studies have separately identified four single nucleotide polymorphisms (SNPs) on chromosome 9p21 that confer susceptibility to coronary artery disease (CAD) and myocardial infarction (MI). This study presents the first analysis of these SNPs (rs10757274, rs2383206, rs2383207, and rs10757278) in a premature, familial CAD/MI population (GeneQuest). We performed a case-control analysis of the GeneQuest Caucasian population with 310 cases with premature CAD and MI (average age at onset of 40.3 ± 5.1) and 560 non-CAD controls to determine if these SNPs are associated with risk of CAD using both the population-based and family-based association study designs. The four SNPs are significantly associated with premature and familial MI and CAD in the GeneQuest Caucasian population (allelic P = 6.61 × 10⁻⁷ to 1.87 × 10⁻⁸). Sib-TDT analysis showed that three of the four SNPs could confer significant susceptibility to premature CAD and MI. These results indicate that the four SNPs on chromosome 9p21 are also associated with premature, familial CAD.     

No association between thrombospondin-4 A387P polymorphism and acute coronary syndrome in Chinese Han population

Objective: The thrombospondin-4 (TSP-4) gene G29926C (A387P) polymorphism was recently reported to be associated with an increased risk of MI (myocardial infarction) in American population. However, several subsequent studies produced controversial findings. The aim of this study was to explore the possible association between TSP-4 A387P polymorphism and ACS (acute coronary syndrome) in Chinese Han population. Methods :A case-control study including 412 patients with ACS and 337 controls free from CAD (coronary artery disease) was conducted. TSP-4 A387P polymorphism was determined by PCR (polymerase chain reaction) and RFLP (restriction fragment length polymorphism) analysis. Results:Slightly decreased frequency of GC genotype was observed in patients with ACS, compared with controls (5.3% vs. 7.1%), but the difference did not reach statistical significance (P = 0.31 ). Similarly, the prevalence of C allele was 2.7% and 3.6% for ACS and control groups, respectively (P = 0.32). None of homozygote was detected for C allele. Further analyses in subjects subgrouped according to sex and age also showed no association of TSP-4 A387P polymorphism with ACS. Furthermore, after adjustment for conventional risk factors by multiple logistic regression analysis, the carrier prevalence of C allele did not differ significantly between ACS and control groups (OR = 0.85; 95% CI:0.45-1.59; P = 0.60). Conclusion:The present study suggested that the TSP-4 A387P variant showed a low prevalence compared with western populations and failed to associate with an altered risk of ACS in Chinese Han population. The findings further supplement experimental data for TSP-4 gene study of coronary disease.