内皮型一氧化氮合酶基因多态性与高血压病发病相关性的研究

目的 研究内皮型一氧化氮合酶（eNOS）基因启动子-786位点及第七外显子第894位点多态性与高血压病发病的相关性.方法 采用病例对照研究的方法,以215名高血压病患者与108名健康中老年人的血白细胞为样本,应用聚合酶链反应一限制性片段长度多态性技术检测两组的内皮型一氧化氮合酶基因启动子-786位点T/C多态性及第七外显子第894位点G/T多态性,比较两组的基因型和等位基因的分布频率.通过两基因位点多态性的分布频率研究两基因变异在高血压病的发病中是否存在协同作用.结果 eNOS基因启动子-786位点T/T、T/C和C/C基因型在高血压病组中分别为22.79%、50.70%、26.51%,在正常中老年人组中分别为36.11%、52.78%、11.11%,此位点高血压病组与正常中老年人组的基因分布频率差异有显著性.eNOS基因第七外显子第894位点G/G、G/T和T/T基因型在高血压病组中分别为69.30%、22.33%、8.37%,在正常中老年人组中分别为82.41%、15.74%、1.85%,此位点高血压病组与正常中老年人组的基因分布频率差异有显著性.当如上两基因型为CC＋TT或TC＋TT时,经计算患高血压病的OR值明显大于基因型为TT＋GG者.结论 ①eNOS基因启动子-786位点及第七外显子第894位点基因多态性与高血压病的发病有一定程度的相关性;②eNOS基因启动子-786位点T/T及第七外显子894位点G/G是高血压病的保护性基因;③两基因变异在高血压病的发病中可能有一定程度的协同作用.     

内皮型一氧化氮合酶基因多态性与冠心病的关联研究

目的对内皮型一氧化氮合酶(eNOS)基因-786T/C、4a4b、894G/T等3个多态性位点与中国汉族人群冠心病(CAD)发病的相关性进行联合研究。方法 148例中国汉族CAD患者和115例正常对照进行以下遗传学分析:应用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)和PCR技术分析2个单核苷酸多态性(SNP)位点即-786T/C和894G/T,以及1个可变串联重复序列(VNTR)位点4a4b,检测各位点基因型和等位基因频率,采用HaploView4.0及SPSS13.0软件经χ2检验比较两组间各位点基因型及等位基因频率的差异。结果 CAD组中eNOS基因-786T/C位点CC基因型频率以及4a4b位点4a/4a基因型频率明显高于对照组,差异有统计学意义(P<0.05)。CAD组和对照组在eNOS基因的894G/T位点等位基因和基因型频率分布均无统计学意义(P>0.05)。结论 eNOS基因-786T/C和4a4b多态性与中国汉族人群CAD存在关联,C等位基因和4a等位基因可能是CAD发病的危险因素。eNOS基因894G/T位点与CAD可能无关联。     

Independent risk factor for moderate to severe internal carotid artery stenosis: T786C mutation of the endothelial nitric oxide synthase gene

BACKGROUND: NO synthesized from L-arginine by the constitutive endothelial NO synthase (eNOS) plays a key role in the atherosclerotic process. We investigated whether common variants in the NOS3 gene (a T786C mutation in the 5' flanking region and the polymorphism on exon 7 that produced the Glu298Arg polymorphism in the protein) are associated with an increased risk of moderate to severe internal carotid artery (ICA) stenosis. METHODS: We studied 88 patients consecutively operated for ICA stenosis and 133 healthy controls. A T786C mutation in the 5' flanking region and the polymorphism in exon 7 that produces the Glu298Asp polymorphism in the protein were explored by PCR and fluorescent probe analysis. RESULTS: Genotype distribution was significantly different between patients and controls only for T786C, the CC genotype frequency being 26% and 13%, respectively [odds ratio (OR), 2.26; 95% confidence interval (CI), 1.14-4.46; P = 0.018]. Moreover, the CC genotype was significantly more frequent in a subgroup of patients with ulcerative plaques compared with patients with nonulcerative lesions (44% vs 17%; OR, 3.82; 95% CI, 1.79-8.14; P = 0.003). Multiple logistic regression analysis using the most frequent risk factors and the eNOS gene variant showed that the CC genotype is an independent risk factor for ICA stenosis (P = 0.023). CONCLUSION: C allele homozygosity in position 786 of the eNOS promoter seems to be an independent risk factor for the development of moderate to severe ICA stenosis, especially ulcerative lesions.     

ACE I allele and eNOS G allele crosstalk may have a role in chronic obstructive pulmonary disease

BACKGROUND: Pulmonary hypertension, a characteristic of chronic obstructive pulmonary disease (COPD) has led us to investigate polymorphisms in angiotensin-converting enzyme (ACE) and endothelial nitric oxide synthase (eNOS) genes. DESIGN AND METHODS: Sixty-six normal and 27 patients, all of whom were smokers, were screened for ACE Insertion/Deletion (I/D) and eNOS G894T and CA-repeat polymorphisms and for plasma ACE and NO levels. RESULTS: Elevated ACE and decreased NO levels were obtained with the pattern of II to ID to DD and GG to GT to TT conversion, respectively. Furthermore, the genotype combination of II and GG was significantly greater in controls as compared to patients (P = 0.01; OR = 2.43; 95% CI: 1.21-4.87; RR = 2.00, 1.15-3.48). The CA-repeat multialleles showed a trimodal pattern in both the groups with a frequency range of 0.0057-0.103 and 0.0208-0.1875 in the controls and patients, respectively. CONCLUSIONS: The lower ACE and higher NO levels by virtue of the interchromosomal interaction between the I and G alleles appear to cause less vasoconstriction and increase vasodilatation that may be advantageous in the improvement of the disease.     

儿童单纯性肥胖与纤维蛋白原Bβ-148C/T、Bβ448G/A基因多态性关系的研究

目的 研究纤维蛋白原Bβ-148C/T、Bβ448G/A 基因多态性与儿童单纯性肥胖的相关性,为防治儿童单纯性肥胖提供理论依据.方法 抽取空腹静脉血采用聚合酶链反应限制性酶切方法对纤维蛋白原Bβ-148C/T、Bβ448G/A位点的基因型进行测定.结果 发现Bβ-148C/T基因型的分布在单纯性肥胖组和正常体重组差异有统计学意义(CC 51/67,CT 47/37,TT 8/2,基因型分布P=0.03);儿童单纯性肥胖T等位基因频率明显高于健康对照组(C 149/171,T 63/41,等位基因频率P=0.02),而B13448G/A基因型及等位基因频率的分布在单纯性肥胖组和正常体重组差异无统计学意义(GG 61/69,AG41/32,AA4/5,G 163/70,A49/42,均为P0.05).结论 纤维蛋白原Bβ-148 C/T基因多态性与儿童单纯性肥胖有相关性.而Bβ448G/A基因多态性与儿童单纯性肥胖不相关.     

中国人群脂联素基因启动子区-11377C/G位点多态性与2型糖尿病易感性的Meta 分析

目的 探讨中国人群脂联素基因启动子区-11377C/G位点多态性与2型糖尿病易感的相关性.方法 检索2011年11月前中国生物医学文献数据库(CBM)、中国期刊全文数据库(CNKI)、万方数据库、维普中文科技期刊数据库(VIP)及Medline、Cochrane Library、Embase、Springer、Ovid等数据库,收集有关中国人群脂联素基因-11377C/G多态性与2型糖尿病的相关性研究;评价纳入研究质量,提取有效数据,采用Review Manager5.0软件进行Meta分析.结果 共纳入12组研究中国人群脂联素基因启动子区-11377C/G位点多态性与2型糖尿病的相关性的病例-对照研究,2型糖尿病病例2 598例,对照4 508例.Meta分析发现,脂联素基因启动子区-11377C/G位点C/G多态性与2型糖尿病相关性中G等位基因与C等位基因[OR=1.14,95%CI(1.03,1.25),P=0.009]、基因型(CG+GG)与CC[OR=1.19,95%CI(1.06,1.35),P=0.004]、基因型CG与CC[OR=1.14,95%CI(1.00,1.29),P=0.05]、基因型GG与CC[OR=1.34,95%CI(1.06,1.71),P=0.02]均具有统计学意义差异.结论 中国人群脂联素基因启动子区-11377C/G位点多态性与2型糖尿病易感性存在相关性.     

醛糖还原酶和内皮型一氧化氮合酶基因多态性并存与糖尿病肾病发病的相关性

背景有关资料显示,醛糖还原酶基因启动子区C-106T多态和内皮型一氧化氮合酶基因第七外显子GLU298ASP(894G→T)多态与糖尿病肾病有关,上述基因多态并存时,2型糖尿病患者糖尿病肾病的发病风险是否明显增加有待进一步研究.目的探讨染色体7q35区醛糖还原酶基因启动子区C-106T多态和内皮型一氧化氮合酶基因第七外显子GLU298ASP(894G→T)多态并存时与中国北方汉族人群糖尿病肾病发病的关系.设计病例-对照,对比观察.单位青岛大学医学院附属医院内分泌科.对象选择2002-11/2005-04在青岛大学医学院附属医院内分泌科住院2型糖尿病患者139例,男54例,女85例,年龄(64±8)岁.符合1999年世界卫生组织关于糖尿病诊断和分类标准.根据24 h尿微量白蛋白排泄率分为2组糖尿病肾病组61例和非糖尿病肾病组78例.选择同期本院体检健康成人63名为对照组,男24名,女39名;年龄50～78 岁.纳入对象均为汉族,且对检测项目知情同意.方法运用聚合酶链反应限制性片段长度多态性技术、DNA测序技术及琼脂糖凝胶电泳分离技术检测纳入对象的醛糖还原酶基因启动子区C-106T多态位点和内皮型一氧化氮合酶基因第7外显子GLU298ASP(894G→T)多态位点的等位基因和基因型.主要观察指标①醛糖还原酶和内皮型一氧化氮合酶基因多态性.②糖尿病肾病危险因素的多元逐步回归分析结果.③醛糖还原酶C-106T多态和内皮型一氧化氮合酶894G→T多态与糖尿病肾病相对危险度.结果2型糖尿病患者139例和健康人63名全部进入结果分析.①糖尿病肾病组内皮型一氧化氮合酶基因第7外显子894G→T多态位点的T等位基因和TG基因型频率明显高于非糖尿病肾病组和对照组(χ2=8.261,19.629,P＜0.01).②糖尿病肾病组醛糖还原酶基因启动子区C-106T多态位点的T等位基因和CT基因型频率明显高于非糖尿病肾病组和对照组(χ2=6.343,8.940,P＜0.05,0.01).③将上述基因多态联合分析发现,糖尿病肾病组的TG/CT基因型频率明显高于非糖尿病肾病组和对照组(χ2=6.972,P＜0.01);GG/CC基因型频率显著低于非糖尿病肾病组和对照组(χ2=13.304,P＜0.01).④糖基化血红蛋白、收缩压、总胆固醇、内皮型一氧化氮合酶基因的第七外显子894G→T多态及醛糖还原酶基因启动子区C-106T多态均是糖尿病肾病的独立危险因素(Wald=5.627,4.92,P＜0.05).⑤GG/CC基因型可能是糖尿病肾病的保护基因型(OR=0.25,P＜0.01);GG/CT或TG/CC基因型携带者糖尿病肾病的危险性增加2.3倍,TG/CT基因型携带者糖尿病肾病的危险性增加4.8倍.结论内皮型一氧化氮合酶基因第7外显子894G→T多态位点的T等位基因和TG基因型和醛糖还原酶基因启动子区C-106T多态位点的T等位基因和CT基因型增加2型糖尿病患者发生糖尿病肾病的危险性,两种基因多态并存时,糖尿病肾病的发病风险明显增加.     

PARP1单核苷酸多态性对晚期胃癌奥沙利铂化疗反应及预后的影响

目的探讨多聚腺苷二磷酸核糖聚合酶(PARP-1)单核苷酸多态性(SNP)与晚期胃癌患者化疗反应及生存时间的关联性。方法选择2016年5月至2019年12月于苏州科技城医院肿瘤内科收治的161例晚期胃癌患者,给予奥沙利铂联合替吉奥化疗,化疗前抽空腹静脉血5 ml用于提取基因组DNA。TaqMan探针法鉴别PARP1基因rs907187C/G、rs1805414T/C和rs1136410T/C多态性位点的基因型,分析各多态性对化疗客观反应率(ORR)及总生存期(OS)的影响。结果 rs907187C/G多态性与化疗敏感性存在明显关联,变异等位基因G携带者化疗ORR显著升高,CC、CG、GG基因型分别为23.2%、42.2%、53.7%(P=0.007)。杂合基因型CG化疗ORR为CC基因型的2.362倍(P=0.035);纯合变异基因型GG化疗ORR为CC基因型的3.812倍(P=0.003);CG+GG基因型化疗ORR为CC基因型的2.854倍(P=0.005)。Kaplan-Meier分析显示rs1136410T/C多态性与患者OS显著相关,变异等位基因C携带者中位OS明显延长,TT、...     

Endothelial nitric oxide synthase gene polymorphisms and risk of coronary artery disease

BACKGROUND: Endothelial nitric oxide synthase (eNOS) could be a candidate gene for coronary artery disease (CAD). This study investigated the relationship of the eNOS Glu(298)-->Asp and T(786)-->C polymorphisms with the presence and severity of CAD in the Italian population. METHODS: We enrolled 415 unrelated individuals who underwent coronary angiography. The severity of CAD was expressed by means of the Duke score. The eNOS Glu(298)-->Asp and T(786)-->C variants were analyzed by PCR. RESULTS: There was significant linkage disequilibrium between the two eNOS polymorphisms (P <0.0001). Both variants were significantly associated with the occurrence and severity of CAD (P = 0.01 and 0.004 for Glu(298)-->Asp and T(786)-->C, respectively). The risk of CAD was increased among individuals homozygous for the C allele of the T(786)-->C polymorphism compared with individuals homozygous for the T allele (odds ratio = 2.5; P <0.01) and was independent of the other common risk factors (P = 0.04). Moreover, individuals with both the Asp/Asp genotype of the Glu(298)-->Asp polymorphism and at least one C allele of the T(786)-->C variant in the promoter region of the eNOS gene had an increased risk of CAD (odds ratio = 4.0; P <0.001) and a significantly higher mean Duke score (26.2 +/- 2.9 vs 45.2 +/- 3.7; P = 0.002) compared with individuals with the TT genotype and the Glu allele. CONCLUSIONS: The present study provides evidence that the Glu(298)-->Asp and T(786)-->C polymorphisms of the eNOS gene are associated with the presence and severity of angiographically defined CAD in the Italian population and that those individuals carrying both eNOS variants simultaneously might have a higher risk of developing CAD.     

Interaction between -786TC polymorphism in the endothelial nitric oxide synthase gene and smoking for myocardial infarction in Korean population

BACKGROUND: Nitric oxide (NO) produced by endothelial nitric oxide synthase (eNOS) mediates endothelium-dependent vasodilation and antithrombotic action. Controversial results regarding the association of eNOS gene polymorphisms with myocardial infarction (MI) have been reported. METHODS: A total of 932 individuals living in Seoul and the suburb, Korea, were randomly selected. Genomic DNA was prepared from blood leukocytes. A GT missense mutation in exon 7 (894GT) was screened using PCR-RFLP analysis. The genotypes of 3 mutations (-786TC, -922AG, and -1468TA) in the 5'-flanking region were determined by a minisequencing protocol (SNaPshot), respectively. RESULTS: Pair-wise linkage analysis revealed that 3 mutations of -786TC, -922AG, and -1468TA were completely linked with each other (mid R:D'mid R:=1, r(2)=0.96-1.0). Furthermore, each of these mutant alleles (-786C, -922G, or -1468A), but not 894T allele, was associated with the risk of MI. Multiple logistic regression analysis revealed that each of these mutant alleles was a predictive independent risk factor for the risk of MI (odds ratio, 1.69 for dominant effects, P<0.05) after age and sex adjustments. Smoking further increased the odds ratio by 2.04 for the risk of MI when it was combined with the mutant alleles. CONCLUSION: Each of 3 mutations (-786TC, -922AG, or -1468TA) in the 5'-flanking region of eNOS gene may play a role in the pathogenesis of MI in Korean population, and also provides an evidence for a significant interaction between these mutations and smoking.     

基于家庭的原发ANCA相关性小血管炎与TGFβ1-509C/T及TCRCα-575A/G的相关性

目的 以家庭为基础,利用传递不平衡原理研究TGFβ1-509 C/T及TCRCα-575 A/G的SNP与AAV的相关关系.方法 采用PCR-RFLP和直接测序法,鉴定88例原发AAV患者及其父母、兄弟姐妹基因型,获得88个核心家庭中264人的基因型,采用传递不平衡检验和HRR分析的方法观察TGFβ1-509 C/T及TCRCα-575 A/G在患病子代的不平衡传递.结果 32个满足TGFβ1-509C/T的传递不平衡检验的AAV患者核心家庭中,杂合子父母传递给患病子代的等位基因频率为C/T=36/28,期望值为C/T=33.5/30.5,两者相比,差异无统计学意义(x2=0.51,P＞0.05);34个满足TCRCα-575 A/G的传递不平衡检验的AAV患者核心家庭中,杂合子父母传递给患病子代的等位基因频率为A/G=29/39,期望值为A/G=33.5/34.5,两者相比,差异无统计学意义(x2=1.59,P＞0.05).38个满足HRR分析的AAV患者核心家庭中,TGFβ1-509 C/T多态性传递的基因型为CC/CT/TT=12/20/6,等位基因为C/T=44/32,未传递基因型为CC/CT/TT=10/19/9,等位基因为C/T=39/37,两者基因型、等位基因相比,差异均无统计学意义(基因型和单体型x2值分别为0.81、0.66,P均＞0.05),HRR=1.30,HRR系数末过度偏离(1.00);39个满足TCRCα-575 A/G的HRR分析的核心家庭中,TCRCα-575 A/G多态性传递的基因型为AA/AG/GG=9/18/12,等位基因为A/G=36/42,未传递的基因型为AA/AG/GG=15/15/9,等位基因为A/G=35/33,两者基因型、等位基因相比,差异均无统计学意义(基因型和等位基因x2值分别为2.20、0.41,P均＞0.05),HRR=0.81,HRR系数未过度偏离(1.00).结论 广西汉族人群中,TGFβ1-509 C/T及TCRCα-575 A/G可能与原发AAV的遗传易感性不相关.

Abstract：

Objective To investigate the relationship between TGFβ1-509 C/T, TCRCα-575 A/G SNPs and primary AAV using a transmission disequilibrium theory based pedigree analysis Methods Genotypes of 264 individuals from 88 AAV families include patients, their parents, brothers and sisters were determined by PCR-RFLP and direct sequencing. Transmission disequilibrium test(TDT) and HRR were employed for the data analysis to observe the transmission disequilibrium of TGF31-509 C/T and TCRCα -575 A/G polymorphisms. Results No transmission disequilibrium from heterozygous parents onto the patients was found in the trios analyzed by TDT for either TGFβ1-509 C/T (observed C/T = 36/28, expected C/T =33. 5/30. 5, x2 =0.51, P＞0.05) or TCRCo-575 A/G ( observed A/G = 29/39, expected A/G = 33.5/34. 5, x2 = 1. 59, P ＞ 0. 05 ). The genotype-based HRR and haplotype-based HRR showed there was no increased risk of AAV in the observed trios for either -509 C/T polymorphism of TGFβ1 (transmitted genotype CC/CT/TT =12/20/6, allele C/T = 44/32; nontransmitted genotype CC/CT/TT = 10/19/9,allele C/T =39/37, genotype-based HRR x2 =0.81, P ＞0. 05, haplotype-based HRR x2 =0. 66, P＞0. 05,HRR = 1.30) or -575 A/G polymorphism of TCRCα ( transmitted genotype AA/AG/GG = 9/18/12, allel A/G = 36/42; nontransmitted genotype AA/AG/GG = 15/15/9, allel A/G = 35/33, genotype-based HRR x2=2. 20, P ＞0. 05. Haplotype-based HRR x2 =0. 41, P ＞0. 05, HRR =0. 81 ). The deviation of HRR coefficient was not excessive(1.00). Conclusion TGFβ1-509 C/T and TCRCo-575 A/G polymorphism may not be associated with the genetic susceptibility of primary AAV in Guangxi Han population.     

-786T>C polymorphism of the endothelial nitric oxide synthase gene in Chilean subjects with coronary artery disease and controls

BACKGROUND: The vascular endothelium plays an important role in the atherosclerotic process through the release of mediators such as nitric oxide. The NO relaxes vascular smooth muscle, inhibits platelet activation, and modulates migration and growth of vascular smooth muscle cells; consequently eNOS may have a significant atheroprotective function through this mechanism. The -786T>C polymorphism of the eNOS gene has been implicated in the development of coronary artery disease (CAD). We investigated the possible association between presence of CAD documented by angiography and the -786T>C polymorphism of the NOS3 gene in Chilean individuals. METHODS: A total of 112 unrelated patients with diagnosis of CAD and 109 controls were included in this study. The -786T>C gene polymorphism was analyzed by PCR-RFLP. RESULTS: The frequency of CC homozygous genotype for -786T>C polymorphism was 6% in CAD patients and 4% in the control group. However, the genotype distribution and allele frequencies were not significantly different between CAD and control subjects (P=NS). Moreover, the odds ratio for CAD associated with the C variant failed to reach statistical significance (OR=1.03; 95% CI: 0.60-1.76, P=NS). CONCLUSION: These findings suggest that the -786T>C polymorphism of the eNOS gene was not associated with CAD in study Chilean individuals.     

Effects of polymorphisms of heat shock protein 70 gene on ischemic stroke, and interaction with smoking in China

BACKGROUND: Heat shock protein 70 (HSP70) plays a key role in up-regulating stress responses, and it may be involved in the pathogenesis of ischemic stroke (IS). However, whether HSP70 polymorphisms are a risk factor for IS is still controversial. METHODS: Three polymorphisms of HSP70 gene (+190G/C, +1267A/G, and +2437T/C) were analyzed by PCR-RFLP in Chinese patients with IS (n=116) and elderly subjects without IS (n=116). RESULTS: The genotype distribution of HSP70-2 and HSP70-hom was not different significantly, but the genotype distribution of HSP70-1 at +190 was different significantly between the patients and controls. The allele frequency of HSP70-1 b2 was significantly higher in the patients (36.64%) than the controls (21.99%, P<0.001). The frequency of HSP70-1 b1b2 genotype was higher in the patients (64.66%) than the controls (37.07%; OR, 3.62). Conditional logistic regression revealed that +190 b2b2+b1b2 genotypes was an independent risk factor for IS (OR, 5.41). After adjustment for other risk factors, the interaction between the HSP70-1 genotype and smoking was confirmed (I(AB),2.78). CONCLUSIONS: HSP70-1+190G/C may affect susceptibility to IS and smoking along with HSP70-1+190G/C may increase the risk of IS.     

胃肠手术患者瑞芬太尼相关基因位点检测在术中麻醉药物剂量评估中的应用

目的　通过检测麻醉药物瑞芬太尼（remifentanil，REM）体内代谢和转运相关基因位点，探讨其与术中瑞芬太 尼使用剂量的关系，为患者提供精准的麻醉药物个体化用药指导。方法　收集5 249 例胃肠手术患者血液样本，应用荧 光探针原位杂交技术检测瑞芬太尼相关基因位点OPRM1(118A ＞ G)，CYP3A4*1G(25343C ＞ T)，ABCB1(3435T>C)， CYP3A4*18B(A>G) 并进行分析，评估不同基因型患者麻醉药物的使用剂量。结果　OPRM1(118A ＞ G) 位点AA/AG 基因型4 636 例（88.32%），GG基因型613 例（11.68%），CYP3A4*1G( 25343C ＞ T) 位点CC/CT 基因型4 922 例（93.77%）， TT 基因型327 例（6.23%），ABCB1(3435T>C) 位点TT 基因型1 842 例（35.09%），TC/CC 基因型3 407 例（64.91%）， CYP3A4*18B(A>G) 位点AA 基因型5 149 例（98.09%），AG/GG 基因型100 例（1.91%）。54 例OPRM1 AA/AG， CYP3A4*1G TT，ABCB1 TT 基因型患者麻醉诱导及术中维持中应减低瑞芬太尼剂量，严格控制静脉泵注速度；118 例 OPRM1 GG，CYP3A4*1G CC 和ABCB1 CC 基因型患者，术中麻醉维持应根据其麻醉程度适当提高瑞芬太尼剂量和泵 注速度；100 例CYP3A4*18B AG/GG 基因型患者适当减少瑞芬太尼剂量，降低静脉泵注速度。结论　不同患者应根据 其瑞芬太尼基因型别合理用药，为麻醉药物使用的患者提供精准的用药指导。     

白细胞介素-6基因-572G/C多态性对急性冠状动脉综合征患者血浆高敏C反应蛋白的影响

目的研究白细胞介素-6（IL-6）基因-572G／C多态性对急性冠状动脉综合征患者血浆高敏C反应蛋白（hs-CRP）浓度的影响。方法采用聚合酶链反应结合限制性内切酶片段长度多态分析方法（PCR-RFLP）检测228例急性冠状动脉综合征患者的IL-6基因-572G／C多态性，用免疫比浊法测定hs-CRP浓度。结果①ST段抬高急性心肌梗死（STEMI）组hs—CRP水平明显高于非ST段抬高急性冠脉综合征（NSTEACS）组，差异有统计学意义（P〈0．05）。②IL-6基因-572G／C多态性的基因型频率：CC42．54％、GC46．92％、GG10．52％；等住基因频率：C66．01％、T33．99％。③在STEMI组中，基因型CC组hs-CRP浓度较基因型GG＋GC组高，差异有统计学意义（P〈0．05）。多因素线性回归分析结果仍显示基因型CC携带者的血浆hs-CRP水平较携带G等住基因者高（P〈0．05）。在NSTEACS组及总人群中，不同基因型组hs—CRP比较差异无统计学意义（P〉0．05）。结论IL-6基因-572G／C多态性对急性冠状动脉综合征患者血浆hs-CRP水平无影响。在STEMI患者中，基因型CC携带者的血浆hs-CRP水平较携带G等住基因者高，提示IL-6基因-572G／C多态性在较高的炎症反应状态下，会对hs-CRP的表达产生影响。     

中国人群miR-146a基因rs2910164多态性与缺血性脑卒中易感性的meta分析

目的探讨中国人群miR-146aC>G（rs2910164）位点单核苷酸多态性与缺血性脑卒中遗传易感性。方法检索2015年12月前中国生物医学文献数据库（CBM）、中国期刊全文数据库（CNKI）、维普中文科技期刊数据库（VIP）、万方数据库及PubMed、Ovid、Cochrane Library、EMBASE等数据库,搜集有关中国人群miR-146aC>G（rs2910164）位点多态性与缺血性脑卒中（IS）研究,采用NOS工具评价纳入相关性研究的质量,提取科学合理有效数据,采用Review Manager 5.0软件进行Meta分析。结果共纳入6篇文献,共有IS患者1945例,健康对照者2456例,Meta分析尚未发现miR146a rs2910164 G/C基因多态性与缺血性脑卒中易感性具有相关性：基因型G vs C：OR=0.97,95%CI（0.89~1.06）,P=0.06;基因型GG vs CC：OR=0.99,95%CI（0.82~1.18）,P=0.88;基因型GC vs CC：OR=1.02,95%CI（0.90~1.17）,P=0.75;基因型GG+GC vs CC：OR=1.01,95%CI（0.90~1.15）,P=0.82。结论本研究尚未发现中国人群miR-146aC>G（rs2910164）位点多态性与缺血性脑卒中易感性之间具有相关性。     

Angiotensin-Converting Enzyme and Endothelial Nitric Oxide Synthase Polymorphisms in Patients with Atrial Fibrillation

GENSINI, F., et al. ; Angiotensin-Converting Enzyme and Endothelial Nitric Oxide Synthase Polymorphisms in Patients with Atrial Fibrillation. Experimental studies have shown a significant increase in angiotensin-converting enzyme (ACE) expression in atrial tissue of AF patients. ACE regulates the synthesis of endothelial nitric oxide (NO), which modulates autonomic nervous activity involved in the development of AF. The aim of the study was to evaluate the prevalence of ACE insertion/deletion and endothelial NO synthase (eNOS) T-786C, G894T, and 4a/4b polymorphisms in 148 patients with persistent AF, compared with 210 control subjects. ACE insertion/deletion polymorphism genotype distribution and allele frequency were significantly different between patients and controls (   P < 0.0001   and   P < 0.0001   , respectively). ACE DD genotype was significantly associated with the risk of AF   (OR DD/ID + II = 3.24, P < 0.0001)   . Analysis of eNOS polymorphisms showed no significant difference in genotype distribution and allele frequency between patients and controls. The results suggest a possible role of ACE DD genotype as a predisposing factor to AF and a pathophysiological mechanism of ACE inhibition in reducing the incidence of AF in patients with left ventricular dysfunction. (PACE 2003; 26[Pt. II]:295–298)     

Endothelial nitric oxide synthase and fractalkine chemokine receptor polymorphisms on angiographically assessed coronary atherosclerosis

BACKGROUND: The CX3CR1 is a fractalkine chemokine receptor expressed by leukocytes attracting them to the arterial wall inflammation. The endothelial nitric oxide synthase (eNOS) produces nitric oxide that acts on the vascular wall and circulating blood cells, lessening the inflammatory atherogenic damage. We determined if -786T > C and E298D eNOS and 745G>A CX3CR1 variants were associated with CAD risk and/or severity in Southern Brazilians of European descent. METHODS: We investigated these polymorphisms in 358 patients who had undergone coronary angiography and 129 non-symptomatic controls by PCR followed by restriction analyses. RESULTS: The 745 G > A CX3CR1 variant was not associated with CAD in this sample. Patients with significant CAD (coronary stenosis >or = 75%) presented higher frequencies of the eNOS -786C, but not of 298D allele than those observed among patients in whom significant CAD was ruled out by angiography (control group 1, p = 0.022) and non-symptomatic controls (control group 2, p < 0.001). The eNOS haplotypes derived from these 2 sites revealed that the frequency of haplotypes carrying the -786C allele (-786C/298D and -786C/298E) was increased and of the wild haplotype (-786T/298E) was decreased in patients with significant CAD (p = 0.003). After controlling for other classical risk factors carriers of haplotypes containing the -786C allele were at increased CAD risk (-786C/298D, OR = 2.95, p = 0.007; and -786C/298E, OR = 2.41, p = 0.030). CONCLUSIONS: The -786T > C was the polymorphism associated with severe CAD in this study. Haplotype analyses can be extremely helpful in unraveling the influence of different markers within a gene.     

北京地区汉族妇女绝经前后护骨素基因多态性与骨密度的关系

背景:原发性骨质疏松症是多基因遗传性疾病,但是调节骨量的基因需进一步研究。目的:探讨护骨素基因启动子区基因多态性与中国北京地区绝经前后妇女骨密度之间的关系。设计:前瞻性调查研究。单位:北京协和医院。对象:选择2002-07在北京协和医院健康体检的495名北京地区无亲缘关系的汉族妇女,其中绝经前妇女为306名,年龄20～39岁,绝经后妇女(指自然停经1年以上者)为189名,年龄50～84岁。所有受试对象均对检测项目知情同意。方法:①骨密度测量:应用双能X线骨密度测量方法,观察对象均采取仰卧位,采用骨密度仪测量其后前位第1～4腰椎及股骨近端,包括股骨颈、Ward’s三角和大转子部位的骨密度值。②基因分型:提取两组受试对象外周血DNA,初步确定护骨素基因分型。并取部分PCR产物送上海博亚有限公司测序,验证基因型,观察两组受试对象护骨素基因型的分布频率及其与骨密度的关系,并用Logistic回归作病因学进一步分析观察绝经后妇女护骨素基因多态性与骨质疏松的关系。主要观察指标:①两组受试对象护骨素基因型的分布频率,及其与骨密度的关系。②绝经后妇女护骨素基因多态性与骨质疏松的关系。结果:纳入受试对象495名,全部进入结果分析。①两组受试对象OPG基因型和等位基因分布频率无明显差异,两组总体基因型分布频率依次为163A→G位点,AA型为70.1%,AG型为26.9%,GG型为3.0%;245T→G位点TT型为71.3%,TG型为25.9%,GG型为2.8%。绝经前妇女在163A→G位点,AA组在L2-4、股骨颈、Ward’s三角和大转子的骨密度低于GG AG组,在245T→G位点,TT组与GG TG组相比各部位的骨密度也低,但均无统计学差异(P>0.05)。绝经后妇女163位点AG GG组在L2-4、股骨颈、Ward’s三角和大转子的骨密度均显著低于AA组(P<0.05);245位点TG GG组在股骨颈、Ward’s三角和大转子的骨密度显著低于TT组(P<0.05)。②绝经后妇女163位点AG GG组在L2-4、Ward’s三角是骨质疏松的危险因素(OR=2.045,2.956,P<0.05,95%可信限1.05-6.7),245位点TG GG组在L2-4、Ward’s三角、大转子是骨质疏松的危险因素(OR=2.059,2.859,2.123,P<0.05,95%可信限1.04-6.5)。结论:北京地区绝经后妇女护骨素基因启动子区的163和245位点为变异型G等位基因时,股骨颈、Ward’s三角和大转子的骨密度较低,变异型G等位基因与绝经后妇女骨密度降低相关。     

Nogo-A基因3＇-侧翼区多态性与缺血性脑卒中患者的遗传易感性

目的探讨Nogo—A基因3＇-侧翼区单核苷酸多态性（SNP）各等位基因及基因型在缺血性脑卒中（Ischemicstroke,IS）患者中的分布频率,并初步分析其基因型与Is的关系及其对血脂、脂蛋白水平的影响。方法采用单碱基延伸的PCR技术和DNA测序法检测202例Is患者及199例对照者的Nogo．A基因3I_侧翼区rs2588510C／T、rs887G／A多态性,分析各基因型及等位基因的分布频率;同时按常规方法测定血浆脂质、脂蛋白水平。结果Is病例组和正常组中Nogo-A基因3’．侧翼区rs2588510CC、CT和TT三种基因型的分布频率分别为19．3％和18．6％,48．5％和41．2％,32．2％和40．2％。rs887AA、GA和GG三种基因型的分布频率分别为64．9％和71．4%,31．7％和24．6％,3．5％和4．O％。Nogo—A基因3-则翼区rs2588510CFF、rs887G／A基因型频率和等位基因频率在IS组和对照组比较差异无显著性（P〉0．05）。结论Nogo-A基因3f-1则翼区rs2588510C／T、rs887G／A的多态性可能与1s的易感性无相关。