白细胞介素-6 -634 C/G基因多态性与脑梗死的关系

目的 探讨中国湖南汉族人群IL-6-634C/G基因多态性与脑梗死的关系.方法 应用聚合酶链反应-限制性酶切片段长度多态性分析(PCR-RFLP)方法对中国湖南汉族314例脑梗死患者和326例与之年龄、性别等相匹配的健康体检者进行IL-6-634C/G基因多态分析,并经基因测序证实.结果 在中国湖南汉族人群中,IL-6-634C/G存在GG、CG、CC 3种基因型;3种基因型和等位基因频率在脑梗死组和对照组之间比较差异无显著性(P>0.05).结论 IL-6-634C/G基因多态性可能不是湖南汉族人群脑梗死的遗传易感基因.     

湖北地区炎症因子基因多态性与动脉粥样硬化性脑梗死的关系

目的探讨相关炎症因子基因多态性与中国湖北地区汉族人群动脉粥样硬化性脑梗死(atherosclerotic cerebral infarction,ACI)的关系。方法在湖北汉族人群中筛选260例脑梗死患者为脑梗死组;200例健康体检者为对照组,采用聚合酶链式反应-限制性片段长度多态性(polymerase chain reaction-restriction fragment length polymorphism,PCR-RFIP)方法测定炎症因子基因多态性。结果脑梗死组与对照组比较,BRAP基因外显子90A/G分布存在统计学差异(χ~2=11.2,P0.05),IL-15基因的C/A基因型分布不存在组间统计学差异(χ~2=3.220,P0.05),Logistic回归分析提示,BRAP基因外显子90GG等位基因携带者发生ACI的风险是CC等位基因的1.8倍(OR=1.476,95%CI 1.142~2.268),且该关联独立于性别、年龄、吸烟、高血压等风险因素。没有证据表明IL-15基因13687C/A位点单核苷酸多态性与动脉粥样硬化性脑梗死易感性相关。结论 BRAP 90A/G外显子基因多态性与动脉粥样硬化性脑梗死发病有关,可能是中国湖北地区汉族人群动脉粥样硬化性脑梗死发病的遗传易感基因。     

湖南汉族人群巨噬细胞移动抑制因子-173G/C基因多态性及其与脑出血关系的研究

目的探讨巨噬细胞移动抑制因子(MIF)-173G/C基因多态性在中国湖南汉族人群中的分布及其与脑出血的关系。方法采用聚合酶链反应-限制性片段长度多态性分析法检测MIF基因-173G/C多态性在脑出血组(162例)和对照组(203例)的基因频率。结果中国湖南地区汉族人群存在MIF基因-173G/C多态性。MIF基因-173G/C基因型的频率分布在脑出血组和对照组之间差异无统计学意义(P>0.05)。G、C两种等位基因频率差异亦无统计学意义(P>0.05)。分类研究后发现合并糖尿病的脑出血组GC+CC(C/X)基因型频率和C等位基因频率显著高于对照组和非合并糖尿病的脑出血组,差异有统计学意义(P<0.05)。结论 MIF-173G/C多态性可能与中国湖南汉族人脑出血发生无关,G/C等位基因可能不是中国湖南地区汉族人群脑出血发病的独立危险因素。     

长沙地区汉族人群apoB基因多态性与脑梗死的关系研究

目的探讨湖南长沙地区汉族人群载脂蛋白B(apolipoprotein B,apoB)G12669A、C7673T多态性与脑梗死的关系。方法采用聚合酶链反应-限制性片段长度多态性分析法分别检测130例脑梗死患者和100例正常对照的apoB基因G12669A、C7673T多态等位基因频率。结果湖南长沙地区汉族人群存在apoB基因G12669A、C7673T多态性,脑梗死组中apoB基因G12669A、C7673T多态等位基因频率G/A为0.904/0.096,C/T为0.881/0.119,在正常对照G/A为0.955/0.045,C/T为0.960/0.040;脑梗死组apoB基因G12669A多态A等位基因频率及C7673T多态T等位基因频率均显高于正常对照组(P<0.05,P<0.01)。结论apoB G12669A多态A等位基因可能是湖南长沙地区汉族人群脑梗死发病的遗传易感因素。     

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。     

汉族人白细胞介素-6-174G/C基因多态性与颅内动脉瘤的关联性研究

目的 探讨汉族人白细胞介素-6-174G/C(IL-6-174G/C)基因多态性与颅内动脉瘤(IA)的相关性.方法 用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术对182例颅内动脉瘤患者(颅内动脉瘤组)和182名健康者(对照组)的IL-6-174G/C的基因多态性进行分析,运用统计学方法分析基因与疾病的相关性.结果 IL-6-174G/C基因型的分布频率与对照组比较有统计学意义(P<0.001),IL-6-174(G/C)G等位基因频率为69.51%,对照组为56.87%,两组比较有统计学差异(P<0.001).结论 IL-6-174G/C基因多态性与颅内动脉瘤的发病有一定关系,考虑C等位基因频率增高与颅内动脉瘤的发病有关.     

肝脂酶基因-250G/A多态性与脑梗死的关系

目的探讨肝脂酶基因(L IPC)-250G/A多态性在中国湖南汉族人群中的分布,及其与脑梗死发病风险的关系。方法采用病例对照研究,筛选194例脑梗死患者及108例正常对照组人群为研究对象。采用聚合酶链反应-单核苷酸多态性方法测定L IPC-250G/A基因多态性。结果在中国湖南汉族人群中,L IPC-250G/A基因型分布为GG 60.2%、GA 31.5%和AA 8.3%,等位基因G和A的分布频率分别为0.759和0.241。GA型和AA型的血浆高密度脂蛋白胆固醇(HDL-C)水平显著高于GG型(P<0.05)。L IPC-250G/A基因型和等位基因频率在脑梗死组与对照组中的分布差异无显著意义(P>0.05)。结论L IPC-250G/A多态性产生有益的临床血脂谱,但可能与中国湖南汉族人群的脑梗死发病无关。     

载脂蛋白(a)基因增强子DH Ⅲ多态性与湖南地区汉族人群动脉粥样硬化血栓性脑梗死的相关性

目的研究载脂蛋白(a)基因DHⅢ增强子-1230A/G多态性与湖南地区汉族人群动脉粥样硬化血栓性脑梗死的关系。方法应用聚合酶链式反应-限制性片段长度多态性技术及DNA序列测定法检测湖南地区汉族人群134例动脉粥样硬化血栓性脑梗死患者、110名健康对照者的载脂蛋白(a)基因DHⅢ增强子-1230A/G多态,同时用免疫比浊法检测所有研究对象的血浆脂蛋白(a)水平。结果在动脉粥样硬化血栓性脑梗死组载脂蛋白(a)基因DHⅢ增强子-1230 A/G多态G等位基因频率(0.728)明显高于对照组(0.618;P=0.01);GG型频率(0.500)明显高于对照组(0.400;P0.05)。动脉粥样硬化血栓性脑梗死组各基因型血浆脂蛋白(a)水平均明显高于对照组,差异具有统计学意义(P0.05)。结论载脂蛋白(a)基因DHⅢ增强子-1230 A/G多态性可能与中国湖南地区汉族人群动脉粥样硬化血栓性脑梗死有关;G等位基因可能是动脉粥样硬化血栓性脑梗死的危险因素之一。     

核因子-κB1-94ins/delATTG基因多态性与中国青岛地区汉族人群急性进展性脑梗死相关性的研究

目的 探讨核因子-κB1(NF-κBl)-94ins/delATrG基因多态性与中国青岛地区汉族人群急性进展性脑梗死(APCI)的相关性. 方法 采用聚合酶链反应-限制性片段长度多态性分析(PCR-RFLP)方法 检测100例急性脑梗死患者(ACI组)和99例APCI患者(APCI组)NF-κB1-94ins/如1ATTG基因多态性;采用细胞免疫组化法检测两组患者外周血单个核细胞(PBMC)胞核NF-κBp65表达率的变化. 结果 APCI组TT基因型和T等位基因频率均明显高于ACI组,比较差异有统计学意义(P<0.05);等位基因频率的相对风险分析发现T等位基因携带者发生APCI的风险是C等位基因的1.622倍;Logistic回归分析显示.TT基因型与APCI的发病独立相关(OR=2.14,95%CI:2.654～8.296,P<0.05).APCI组TT基因型个体PBMC胞核NF-κBp65表达率明显高于ACI组,比较差异有统计学意义(P<0.05);Logistic回归分析显示,TT基因型个体PBMC胞核NF-κBp65表达率与APCI的发病独立相关(OR=1.96,95%CI:2.267～7.691,P<0.05). 结论 NF-κB1-94ins/delA TTG基因多态性参与了APCI发生.T等位基因可能是中国青岛地区汉族人群APCI发病的遗传易感基因.携带T等位基因的个体可能通过上调NF-κB1的表达而增加APCI的发病风险.     

唐山地区汉族人群脑梗死患者IL-6基因-174G/C多态性研究

目的探讨唐山地区汉族部分人群中IL-6基因-174C/G多态性与脑梗死的关系。方法采用多聚酶链反应-限制性片段长度多态法(PCR-RFLP)技术,检测118例脑梗死患者(病例组)和154例健康体检者(对照组)的IL-6基因-174C/G多态性位点频率,分析其基因型。结果脑梗死病例组与对照组IL-6-174G/C基因型全部为GG基因型,均未观察到CG和GG基因型存在。结论唐山地区汉族部分人群中不存在IL-6-174G/C基因多态性,-174位点的变异可能和脑梗死的发生、发展没有明确的关系。     

Association of interleukin-6-572G/C gene polymorphisms in the Cantonese population with intracranial aneurysms

Recent studies have demonstrated that cytokines play an important role in the pathogenesis of intracranial aneurysms (IAs). Interleukin-6 (IL-6) is an important proinflammatory cytokine. In our study, we investigated the association of genetic variants within the gene encoding interleukin-6-572G/C (IL-6-572G/C) with IAs in the Cantonese population. The IL-6-572G/C gene polymorphisms in 182 IA cases and 182 controls were analyzed using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Differences in genotype and allele frequencies between patients and controls were tested. There is significant difference of IL-6-572G/C genotype frequencies in IA group compared with control group (P=0.01), and significant difference of IL-6-572G/C allele frequency in IA group (11.54%) compared with control group (4.95%) (P=0.001). Polymorphisms within IL-6-572G/C gene are associated with IAs in the Cantonese population suggesting that the IL-6-572G/C gene is an important candidate gene for IAs.     

Association between interleukin-6 gene promoter −572C/G polymorphism and the risk of sporadic Alzheimer’s disease

Inflammation is a key component of Alzheimer’s disease (AD), and we have examined the effect of two polymorphisms (−174G/C and −572C/G) in the promoter of the inflammatory cytokine interleukin-6 (IL-6) gene on risk of AD in 318 AD patients. Significant differences in genotype and allele frequencies of −572C/G IL-6 promoter polymorphism were observed between AD patients and controls. The GG genotype was associated with a decreased risk of developing AD (OR 0.423, 95% CI 0.200–0.894). Similarly, logistic regression analysis revealed that G allele was a protective factor for AD (OR 0.732, 95% CI 0.567–0.945). For −174G/C variability, no C variability was found in all the subjects. The frequency of the IL-6 −174G/C promoter polymorphism is very low or no variability in Henan Han population. The −572C/G polymorphism of IL-6 gene promoter region is associated with AD, and G allele is an independent protective factor for AD.     

白细胞介素-6基因-174G/C多态性与阿尔茨海默病及血管性痴呆的关联研究

目的 探索白细胞介素-6(IL-6)基因启动子区-174G/C多态性与阿尔茨海默病(AD)、血管性痴呆(VD)的关系.方法 采取病例对照研究方法 ,以广州地区流行病学调查中诊断的161例AD、54例VD患者和247名健康老年人为研究对象,用聚合酶链反应-限制性片段长度多态性技术检测IL-6基因-174G/C多态性.结果 (1)所有研究对象均无C/C基因型.(2)AD组C等位基因频率(0.9%)及G/C基因型(1.9%)高于正常对照组(均为0),但差异无统计学意义(P＞0.05);按是否携带载脂蛋白E(Apo E)ε4进行分层,差异仍无统计学意义(P＞0.05).(3)VD患者C等位基因(1.9%)频率及G/C基因型(3.7%)高于正常对照组(均为0),差异有统计学意义(均P＜0.05).(4)中、重度AD患者含ε4等位基因的频率(23.9%)高于对照组(14.7%,P＜0.05).结论 IL-6基因-174G/C多态性不是广州地区汉族人群AD发病的危险因素,但与VD可能有关联.     

The -174G/C polymorphism of the interleukin 6 gene is a hallmark of lacunar stroke and not other ischemic stroke phenotypes

BACKGROUND AND PURPOSE: The CC genotype of the -174 G/C interleukin (IL)-6 polymorphism has been associated with lacunar stroke. However, it remains unsettled whether this polymorphism is also associated with other ischemic stroke phenotypes. METHODS: The -174 G/C IL-6 polymorphism was genotyped in patients with lacunar stroke (n = 89), stroke due to large vessel disease (n = 82), cardioembolism (n = 53), stroke of undetermined cause (n = 49) and in white controls without any history of stroke (n = 105) by PCR and restriction enzyme analysis. Independent predictors of the -174 G/C IL-6 genotypes were assessed using multivariate logistic regression models adjusted for demographics, risk factors and disease state. RESULTS: The prevalence of the CC genotype was 8.5% in large vessel disease, 7.5% in embolism, 19.1% in lacunar stroke, 14.3% in stroke of undetermined cause and 8.6% in controls. The CC genotype was independently associated with lacunar stroke only (adjusted OR 3.22, 95% CI 9.09-1.12). Contrarily, there were no significant differences in genotype and allele distribution in the remainder of ischemic stroke phenotypes. Pooling of patients with nonlacunar stroke did not show any independent association with the CC genotype as compared with controls (OR 1.01, 95% CI 2.77-0.36). CONCLUSIONS: The unique association between the CC genotype of the -174 G/C IL-6 polymorphism and lacunar stroke suggests a particular susceptibility of small deep penetrators of cerebral arteries to IL-6-mediated inflammatory damage.     

Genetic variation in the interleukin-6 gene in relation to risk and outcomes in acute coronary syndrome

BACKGROUND: The concept of inflammation in the acute coronary syndrome (ACS) is today well established. Interleukin-6 (IL-6), a pleiotropic, proinflammatory cytokine, seems to play an important role in the development and progression of ACS. AIM: The aim was to investigate whether IL6 polymorphisms are associated with patient/control status, outcome in patients with ACS and plasma concentrations of IL-6 and C-reactive protein (CRP). METHODS: Samples for citrated plasma and DNA were obtained on admission from 3027 patients with non-ST-elevation ACS in the FRISC-II study. A group of 447 healthy controls of similar age and gender as the patients was also recruited. Eight IL6 polymorphisms were genotyped and plasma concentrations of IL-6 and CRP measured in patients and controls. RESULTS: No associations between patient/control status, clinical outcome, ST-depression, troponin-T elevation or a history of myocardial infarction and IL6 polymorphisms were observed. In the full patient group, there was a trend towards association of the -572 G>C polymorphism with plasma concentrations of IL-6 (p=0.07). This association was statistically significant in patients with available high-sensitivity measurements of IL-6 (p=0.01). The -572 CG genotype was predictive for IL-6 levels above 5 ng/L in patients with a subsequent cardiovascular event, 2.3 (1.1-4.3) (adjusted odds ratio, 95% confidence interval). Comparison with data from HapMap showed that our panel of polymorphisms covered information on approximately 30 other IL6 variants. CONCLUSION: The -572 G>C and other polymorphisms in the study were not associated with outcome in ACS patients. However, the -572 CG genotype may contribute to a more distinct inflammatory response in patients with ACS.     

IL-6基因调控区-174G/C多态性与急性脑梗死的关系

目的　探讨急性脑梗死患者 IL - 6基因调控区 - 174位点多态性与疾病的相关关系。方法　急性脑梗死患者 42例 ,男 2 4例 ,女 18例 ,年龄 41～ 90岁 ,平均 6 6 .6± 9.8岁。健康对照组 18例 ,男 11例 ,女 7例 ,年龄 31～ 5 4岁 ,平均 45 .6± 8.7岁。采用 PCR扩增、限制性内切酶片段长度多态性 ( RFL P)分析和 DNA序列测定 ,认识IL - 6基因调控区 - 174位点的多态性 ;同时 EL ISA定量分析脑梗死患者和正常人血清白细胞介素 - 6的含量。结果　急性脑梗死患者 IL - 6基因调控区 - 174位点均为 GG型。患者血清白细胞介素 - 6水平升高 ,明显高与正常对照组 ( P<0 .0 1)。结论　急性脑梗死患者未发现 IL - 6基因调控区 - 174位点的基因变异 ,推测 - 174位点的多态性没有参与急性脑梗死的发生和发展过程。     

Prothrombotic gene polymorphisms and atherothrombotic cerebral infarction

OBJECTIVES: To test the hypothesis whether risk genotypes of the prothrombotic gene polymorphisms (I/D 4G5G PAI-1, G1691A factor V point mutation, factor VII Arg/Gln353) are risk factors for ACI in the Slovene population. The study sought an association between the insertion/deletion 4G/5G-plasminogen activator inhibitor 1 (PAI-1) gene polymorphism, the 1691G-A factor V point mutation or the arg353-to-gln factor VII gene polymorphism and atherothrombotic cerebral infarction (ACI). MATERIAL AND METHODS: Ninety-six Slovene patients who suffered ACI were compared with 115 control subjects clinically free of cerebrovascular disease. Insertion/deletion 4G/5G PAI-1 gene polymorphism, 1691G-A factor V point mutation and arg353-to-gln polymorphism in the factor VII were determined using polymerase chain reaction. RESULTS: The 4G4G genotype of 4G5G PAI-1 gene polymorphism was less frequent in cases (21.9%) than in controls (35.6%; OR = 0.5, 95% CI = 0.3-1; P = 0.033). No association was found either between the factor V point mutation (1691G-A) or the RR genotype of the factor VII Arg/Gln353 gene polymorphism and the risk of ACI using univariate analysis. CONCLUSION: The 4G/4G-PAI-1 genotype might be a protective factor against ACI, whereas the factor V point mutation (1691G-A) and the factor VII Arg/Gln353 gene polymorphism have not proved to be risk factors for ACI.     

醛固酮合成酶基因多态性与急性脑梗死相关性研究

目的研究醛固酮合成酶(CYP11B2)基因-344T／C多态性与急性脑梗死(ACI)的关系。方法应用多聚酶链-限制性片段长度多态性(PCR-RFLP)技术,对341例ACI患者和329例正常人的CYP11B2基因-344位点基因多态性进行检测,并用放射免疫方法测定其血浆醛固酮的浓度。结果病例组CYP11B2基因TC和CC基因型的频率显著高于对照组,分别为38．12％和9．97％,相对于TT基因型,暴露于TC和CC基因型人群的OR值分别为 1．72和1．88;病例组C等位基因的频率也显著高于对照组,为29．03％,相对于T等位基因,C等位基因的OR值为 1．57。携带CC基因型的个体,ALD浓度病例组显著高于对照组(P<0．05);病例组中CC基因型的血浆醛固酮 (ALD)浓度显著高于TT基因型(P<0．05)。结论醛固酮合成酶(CYP11B2)基因-344T／C多态性与ACI相关;C 等位基因可能是中国人ACI的一个遗传标志。     

TAFI基因启动子区-2345 2G/1G多态性与脑梗死的关系

目的分析中国汉族人群TAFI基因启动子区-2345 2G/1G与动脉粥样硬化性脑梗死发病的关系。方法选择225例脑梗死（病例组）和184例健康体检者（对照组）为对象,应用等位基因特导性聚合酶链反应分析方法（AS-PCR）检测-2345 2G/1G多态性。结果 TAFI-2345 2G/1G在病例组的1G等位基因频率为42.9%,对照组为50.8%,2组间差异有统计学意义（P=0.024）;病例组1G/1G基因型频率为15.1%,对照组为24.5%,2组间差异有统计学意义（P=0.017）。经Logis-tic回归分析,TAFI-2345 1G/1G基因型与脑梗死的发病有独立相关性。结论 TAFI-2345 2G/1G多态性与动脉粥样硬化性脑梗死的发病有关联,1G/1G基因型可能使脑梗死患病风险降低。