CYP4F2基因多态性及其单体型与重庆汉族人群冠心病的相关性

目的研究CYP4F2基因多态性及其单体型与重庆汉族人群冠心病的相关性。方法采用聚台酶链反应-限制性片段长度多态性方法,对420例汉族冠心病患者(冠心病组)和412例汉族健康体检者(对照组)CYP4F2基因的3个单核苷酸多态性rs1558139、rs2108622和rs3093166进行基因分型和单体型构建,应用病例对照单体型方法进行相关性分析。结果冠心病组CYP4F2基因rs2108622的CC基因型频率明显高于对照组(60.0% vs46.8%,OR=1.570,95%CJ:1.259～1.958,P<0.05),而rs1558139和rs3093166基因型在两组间分布差异无统计学意义(P>0.05);冠心病组G-T-T单体型频率明显低于对照组(0.219 vs 0.306.OR =1.636.95%CI:0.510～0.793,P<0.01);冠心病组G-T-C单体型频率明显高于对照组(0.183 vs 0.070.OR =2.958.95%CI:2.149～4.071,P<0.01)。结论 CYP4F2基因rs2108622位点CC基因型可能与重庆汉族人群冠心病的发生有相关性;G-T-C单体型可能为重庆汉族人群冠心痛的易感标志;G-T-T单体型可能为重庆汉族人群冠心痛的保护因素。     

中国汉族人群NOD2、IRGM、ATG16L1和STAT4基因多态性与克罗恩病的相关性研究

背景：克罗恩病（CD）的病因和发病机制尚未完全阐明,近年国外研究发现NOD2、IRGM、ATG16L1、STAT4基因突变与CD相关。目的：分析NOD2、IRGM、ATG16L1、STAT4基因多态性与中国汉族人群CD发病的相关性。方法：连续纳入2007年1月～2010年1月苏州市立医院中国汉族CD患者66例,66名健康体检者作为正常对照,以PCR联合基因测序检测4种基因相应单核苷酸多态性（SNP）位点的基因型,分析各基因型和等位基因频率。结果：CD组和正常对照组NOD2基因rs2066842位点、IRGM基因rs13361189位点、ATG16L1基因rs2241880位点和STAT4基因rs7574865位点基因型和等位基因频率分布均符合Hardy-Weinberg遗传平衡定律,两组间4种基因相应SNP位点的基因型和等位基因频率差异均无统计学意义。结论：NOD2、IRGM、ATG16L1和STAT4基因多态性与中国汉族人群CD发病不相关。     

PPARγ基因外显子区多态性与江苏省汉族人群2型糖尿病遗传易感性

目的 探讨江苏省汉族人群PPARγ基因外显子区两个单核甘酸多态性(rs1801282,rs3856806)与2型糖尿病(T2DM)的关系.方法 采用病例对照研究选取新发T2DM 296例,年龄、性别频数匹配的健康对照477名,用PCR-RFLP方法进行两位点多态性检测.结果 PPARγ基因rs3856806位点多态性在病例组与对照组的分布差异有统计学意义(P＜0.05).与携带CC型相比较,携带CT/TT型者患T2DM风险降低.分层分析发现在女性、>50岁、高血压或体重正常群体中,携带CT/TT型者较CC型者患T2DM风险降低[OR值分别为0.33 (95%CI: 0.14,0.76),0.45 (95%CI: 0.23,0.88)、0.59 (95%CI: 0.36,0.95),0.34 (95%CI: 0.13,0.94)].rs1801282位点多态性在病例组和对照组中的分布差异无统计学意义(P＞0.05),但分层分析发现,携带CG(Pro/Ala)型肥胖者较CC型者患T2DM发病风险降低[OR(95%CI)=0.30(0.09,0.90)].结论 PPARγ基因多态性改变可能与江苏汉族人群T2DM遗传易感性有关.     

EDNRA和EDNRB基因单核苷酸位点多态性与缺血性脑卒中的相关性

目的探讨中国北方地区汉族人群内皮素受体(EDNR)A和EDNRB基因中单核苷酸多态性(SNP)与缺血性脑卒中(IS)的相关性。方法检测EDNRA基因的3个位点:rs1801708、rs5333、rs5335和EDNRB基因的2个位点:rs3818416、rs5351在对照组、IS组中的多态分布。结果在男性群体中,EDNRA基因rs5335位点突变纯合型CC发病危险度明显降低(P=0.016;OR=0.52;95%CI=0.31~0.88);在女性群体中,EDNRA基因rs1801708位点中,突变纯合型AA发病危险度明显高于G基因携带者(P=0.019;OR=2.65;95%CI=1.18~6.00)。结论 EDNRA基因rs5335位点的C等位基因能够降低北方汉族男性人群IS的发病风险,rs1801708位点的A等位基因能够增加北方汉族女性人群IS的发病风险。     

P2RX7基因多态性与中国汉族男性原发性痛风的相关性

目的探讨P2RX7基因四个位点(rs2230911、rs208294、rs435309和rs28360447)的单核苷酸多态性与我国汉族男性原发性痛风发病的相关性。方法选取219例男性原发性痛风患者和247例男性健康对照者,用SNa Pshot SNP分型技术对P2RX7基因四个位点的多态基因型进行检测。用Hardy-Weinberg平衡检验研究对象的基因型,P0.05认为所选研究对象达到遗传平衡,具有可靠的群体代表性。用SPSS 18.0统计学软件对实验所得数据进行统计学处理,符合正态分布的计量资料比较用t检验或方差分析;计数资料比较则用卡方检验。用Logistic回归分析计算比值比(OR)及95%可信区间(95%CI),估计痛风发病的相对风险。双侧P0.05认为差异有统计学意义。结果 P2RX7基因rs2230911、rs208294和rs435309三个位点在研究人群中符合哈迪-温伯格遗传平衡定律(P0.05)。其中rs2230911位点基因型CG+GG发生痛风的风险是基因型CC的1.79倍[OR(95%CI)=1.79(1.20,2.67),P=0.005]。等位基因G发生痛风的风险是等位基因C的1.56倍[OR(95%CI)=1.56(1.10,2.21),P=0.013]。其余位点在两组基因型及等位基因的分布频率差异无统计学意义(P0.05)。结论 P2RX7基因rs2230911位点多态性可能与我国汉族男性原发性痛风发病相关,等位基因G是痛风发病的危险因素。     

树突状细胞免疫受体基因多态性与抗环瓜氨酸肽抗体阴性类风湿关节炎相关性研究

目的 在汉族人群中研究树突状细胞免疫受体(DICR)基因多态性与类风湿关节炎(RA)及其不同亚型的易感相关性.方法 采用病例-对照研究法,选取年龄及性别相匹配的RA患者523例和健康对照510名;采用Taqman探针法检测DCIR基因rs2377422和rs10840759位点单核苷酸多态性(SNP);检测RA患者抗环瓜氨酸肽(CCP)抗体水平,分析DCIR基因多态性与不同亚型RA相关性;采用实时荧光定量聚合酶链反应(PCR)方法,定量检测DCIR在RA患者(233例)及健康者(71名)中mRNA表达水平,并进一步分析不同DCIR基因型对DCIR表达水平的影响.统计学处理采用X检验和多因素Logistic回归检验,2组间比较采用曼-惠特尼U检验.结果 ①DCIR SNP rs2377422与汉族RA发病明显相关(等位基因:OR 1.26;95％CI 1.06～1.50,P=0.005;基因型CC与TT+TC:OR 1.34;95％CI1.18～2.06,P=0.004);②DCIR SNP rs2377422主要与抗CCP抗体阴性RA发病相关(等位基因:OR 1.46;95％CI1.10～1.93,P=0.0091;基因型CC与TT+TC:OR 1.58;95％CI1.01～2.47,P=0.043);③和健康对照相比,RA患者外周血中DCIR基因mRNA水平显著增高(0.47-0.10与0.17-0.03,U=6502,P=0.000 38),且携带DCIR rs2377422 CC基因型的RA患者,其DCIR表达水平进一步明显增高(CC与TT+TC:0.429±0.069与0.238±0.023,U=1861,P=0.002).结论 汉族人群中DCIR rs2377422多态性主要与抗CCP抗体阴性RA易感相关;RA患者DCIR基因表达水平明显增高;DCIR rs2377422多态性可明显影响DCIR基因的表达.     

脂蛋白脂酶基因多态性与中青年原发性高血压的相关性研究

目的:探讨中国中青年汉族人群中脂蛋白脂酶(LPL)单核苷酸基因多态性(SNP)与原发性高血压(EH)易感性的关系。方法:根据一定的纳入和排除标准筛选高血压患者及健康体检人群,收集临床资料,采集血液标本,采用TaqMan-MGB法检测LPL基因rs253和rs328位点多态性,分析基因多态性与中青年原发性高血压发病率的相关性。结果:病例组入选499例,对照组入选336例,两组之间性别、年龄、吸烟比例、血肌酐水平差异无统计学意义,饮酒、家族史、血压、血糖等指标有统计学差异。不同基因型在病例组与对照组的分布:rs253位点CC、CT、TT基因型分布有统计学差异(P=0.044),rs328位点等位基因G、C分布频率有统计学差异(P0.001)。将总体按BMI是否25 kg/m~2和是否有血脂异常分层并进行多种基因模型分析,结果显示在中青年肥胖人群(BMI≥25 kg/m~2)中,rs253位点隐性模型CC vs CT+TT中基因型频率分布有统计学差异(P=0.002);在血脂异常的人群中,rs253位点隐性模型CC vs CT+TT基因型频率分布有统计学差异(P=0.020)。Logistic回归分析校正性别、年龄、吸烟、饮酒、家族史、BMI、血脂等多个混杂因素后,结果依然显示,在中青年肥胖人群中,rs253位点隐性模型与高血压发病风险显著相关(P=0.017,OR=0.598,95%CI:0.393～0.912);在有血脂异常的人群中,该模型亦与高血压发病风险相关(P=0.037,OR=0.652,95%CI:0.436～0.975)。结论:在国内中青年汉族肥胖人群以及有血脂异常的人群中,LPL基因rs253位点多态性可能与EH发生相关,该位点CC基因型较CT和TT发病风险明显降低;rs328位点则未见与EH明显相关性。     

EGR3基因rs11136094多态性与缺血性脑卒中中医证候的相关性

目的 旨在探讨早期生长反应因子3基因(EGR3)rs11136094多态性与缺血性脑卒中(IS)中医证候的相关性。方法 纳入病例组774例IS患者、对照组793例健康体检人群。采用《中风病辨证诊断标准(试行)》对IS患者进行中医辨证。运用MassarraySNP基因分型实验技术进行基因分型。运用PLINK软件和SPSS19.0软件进行统计分析。结果 校正年龄、性别后，EGR3基因rs11136094多态性与IS风证的发生风险显著相关[加性模型：OR(95%CI)=0.82(0.68～0.99),P=0.041;隐性模型：OR(95%CI)=0.67(0.49～0.91),P=0.010;EGR3基因rs11136094多态性与IS风证评分的关联具有统计学意义[隐性模型：β(95%CI)=-0.81(-1.49～-0.13),P=0.019];rs11136094多态性与IS风证患者的血小板(PLT)水平显著相关[隐性模型：β=(95%CI)=24.68(4.37～44.99),P=0.018]。结论 EGR3基因rs11136094遗传多态性可能影响IS风证的发生发展。     

细胞色素氧化酶基因CYP1A2多态性与新疆汉族和维吾尔族人群冠心病的相关性

目的 探讨新疆地区维吾尔（维）族人群、汉族人群细胞色素氧化酶基因CYP1A2（cytochrome c oxidase P1A2）多态性与冠心病的关联性。 方法 我们采用两项独立的病例对照研究∶汉族人群389例冠心病患者(病例组）和411名健康体检者（对照组）;维族人群293冠心病患者（病例组）和408名健康体检者（对照组）。通过实时PCR对CYP1A2基因单核苷酸多态性（SNPs）rs2069522和rs2472304进行基因分型。 结果 仅在汉族人群中,SNP1 (rs2069522)基因型的分布在冠心病组和对照组之间差异均有统计学意义(P < 0.05)。而维族人群中未见显著差异。新疆汉族病例组SNP1 (rs2069522)显性模型(CC vs CT + TT)基因型频率显著高于对照组。调整混杂因素后logistic回归分析表明,新疆汉族人群CC基因型患冠心病的风险显著高于CT + TT基因型者(总体:OR = 1.982,95%CI: 1.174～3.236, P < 0.01;男性: OR = 2.671,95%CI: 1.548～4.314, P < 0.01)。 结论 新疆汉族人群CYP1A2基因中rs2069522的位点与冠心病相关。CC基因型可能是新疆汉族人群而非维吾尔族人群发生冠心病的独立危险因素。     

CD22基因多态性与中国南方汉族人群系统性红斑狼疮相关性研究

目的 探讨CD22基因T＞A位点(SNPrs2267574)与中国南方汉族人群系统性红斑狼疮(SLE)的遗传易感性及其表型间的相关性.方法 采用病例对照研究,收集215例病例和216例对照,应用聚合酶链反应-限制性片段长度多态性分析(PCR-RFLP)技术进行基因分型,分析基因与疾病关联性以及表型相关性.结果 SLE患者组AT基因型的频率高于对照组(OR=1.68,95%CI:1.08～2.60,P=0.021);以T等位基因为参照,A等位基因的OR=1.58,95%CI:1.09～2.29,P=0.015;且A等位基因频率在抗SSA抗体阳性组高于抗SSA抗体阴性组(OR=3.69,95%CI:2.08～6.52,P＜0.01).结论 在中国南方汉族人群中,CD22基因T＞A位点与SLE具有相关性,抗SSA抗体的产生与A等位基因有关.     

A meta-analysis of the association of STAT4 polymorphism with systemic lupus erythematosus

STAT4 has been newly identified as a susceptibility gene for systemic lupus erythematosus (SLE) in recent reports. To more precisely estimate the association between STAT4 polymorphism and SLE risk, a meta-analysis was performed. Studies on the association of STAT4 rs7574865 or rs7601754 with SLE were fully considered and carefully selected using three electronic databases (PubMed, Embase, and Web of Science). A total of 17 comparisons from 8 relevant studies involving 7,381 patients and 11,431 controls were included to analyze the association between STAT4 rs7574865 and SLE risk. The pooled OR for the minor T allele of STAT4 rs7574865 was 1.65 (95% CI 1.56–1.75, P < 0.001) in SLE. In a subgroup analysis by ethnicity, the degree of risk of STAT4 rs7574865 with SLE susceptibility was similar in populations of European or Asian origin, although significant differences in the minor T allele frequencies were observed in the two population controls. As for rs7601754, there were five comparisons from four relevant studies involving 2,498 patients and 4,825 controls in this meta-analysis. The pooled OR for the minor C allele of STAT4 rs7601754 was 0.67 (95% CI 0.59–0.75, P < 0.001) in SLE. Conversely, the major T allele of STAT4 rs7601754 might be a risk factor for SLE risk. In conclusion, our results do support STAT4 rs7574865 polymorphism as a susceptibility factor for SLE in populations of European and Asian origin. Our results also suggest that STAT4 rs7601754 polymorphism might be associated with SLE risk.     

Association of STAT4 with rheumatoid arthritis: a replication study in three European populations

OBJECTIVE: This study was undertaken to investigate the previously reported association of the STAT4 polymorphism rs7574865 with rheumatoid arthritis (RA) in 3 different European populations from Spain, Sweden, and The Netherlands, comprising a total of 2,072 patients and 2,474 controls. METHODS: Three different cohorts were included in the study: 923 RA patients and 1,296 healthy controls from Spain, 273 RA patients and 285 healthy controls from Sweden, and 876 RA patients and 893 healthy controls from The Netherlands. DNA from patients and controls was obtained from peripheral blood. Samples were genotyped for the STAT4 single-nucleotide polymorphism rs7574865 using a TaqMan 5'-allele discrimination assay. The chi-square test was performed to compare allele and genotype distributions. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated. RESULTS: We observed a significantly increased frequency of the minor T allele in RA patients compared with healthy controls in the Spanish population (24.8% versus 20.8%; P = 0.001, OR 1.26 [95% CI 1.09-1.45]). This association was confirmed in both the Swedish population (P = 0.03, OR 1.35 [95% CI 1.03-1.77]) and the Dutch population (P = 0.03, OR 1.45 [95% CI 1.21-1.73]). The overall P value for all 3 populations was 9.79 x 10(-6) (OR 1.25 [95% CI 1.13-1.37]). No association between rs7574865 and the presence of rheumatoid factor or anti-cyclic citrullinated peptide autoantibodies was observed. A meta-analysis of all published STAT4 associations revealed an OR of 1.25 (95% CI 1.19-1.33) (P = 1 x 10(-5)). CONCLUSION: Our findings indicate an association between the STAT4 polymorphism rs7574865 and RA in 3 different populations, from Spain, Sweden, and The Netherlands, thereby confirming previous data.     

Relationship between interleukin-6 polymorphism and susceptibility to chronic hepatitis B virus infection

AIM:To identify the relationship between tag single nucleotide polymorphisms(tag SNPs) of interleukin-6(IL-6) gene and susceptibility to chronic hepatitis B virus(HBV) infection in a Han Chinese population.METHODS:We performed a case-control study of501 Chinese patients with chronic HBV infection and301 self-limiting HBV-infected individuals as controls.Genomic DNA was isolated from the whole blood of all subjects using phenol/chloroform with MaXtract highdensity tubes. Tag SNPs were identified using genotype data from the panel(Han Chinese in Beijing) of the phase II HapMap Project. Four tag SNPs in IL-6(rs17147230A/T,rs2066992G/T,rs2069837A/G and rs2069852A/G) were genotyped by the Multiplex Snapshot technique. The genotype and allele frequencies were calculated and analyzed.RESULTS:Five haplotypes were involved in the analysis,with frequencies higher than 0.03. One of the haplotypes,TTAA,was significantly different between the two groups. Overall haplotype P values were:ATAA,P = 0.605,OR(95%CI) = 1.056(0.860-1.297); TGAG,P = 0.385,OR(95%CI) = 1.179(0.813-1.709); TGGG,P = 0.549,OR(95%CI) = 1.087(0.827-1.429); TTAA,P = 0.004,OR(95%CI) = 0.655(0.491-0.873); TTAG,P = 0.266,OR(95%CI) = 1.272(0.832-1.944). However,the four SNPs showed no significant genotype/allele associations with susceptibility to chronic HBV infection. Overall allele P values were:rs17147230,P = 0.696,OR(95%CI) = 1.041(0.850-1.276); rs2066992,P = 0.460,OR(95%CI)= 1.090(0.868-1.369); rs2069837,P = 0.898,OR(95%CI) = 0.983(0.759-1.274); rs2069852,P = 0.165,OR(95%CI) = 0.859(0.693-1.064). Overall genotype P values were:rs17147230,P = 0.625; rs2066992,P= 0.500; rs2069837,P = 0.853; and rs2069852,P =0.380.CONCLUSION:The four tag SNPs of IL-6 gene may be associated with susceptibility to chronic HBV infection in the Han Chinese population.     

A meta-analysis of the association between cytokine gene polymorphisms and systemic sclerosis

We conducted a comprehensive meta-analysis to quantitatively evaluate the association of cytokine gene polymorphisms with systemic sclerosis (SSc) susceptibility. Electronic databases were used to identify published studies before July 2011. In total, 23 case-control studies including 3524 SSc cases and 6086 healthy controls were included in the meta-analysis. We examined the relationship between five gene polymorphisms [cytotoxic T lymphocyte associated antigen 4 (CTLA-4) -1722T/C, CTLA-4 -318C/T, CTLA-4 +49A/G, angiotensin-converting enzyme I/D, STAT-4 rs7574865] and susceptibility to SSc. The combined odds ratio (OR) with 95% confidence interval (95% CI) was calculated to estimate the strength of the association in a fixed or random effect model. Heterogeneity and publication bias were also assessed. We found a significant association between SSc and STAT rs7574865 (TT vs. GG: OR 0.44, 95% CI 0.36-0.54; TT vs. TG?+?GG: OR 0.48, 95% CI 0.39-0.59; TT?+?TG vs. GG: OR 0.74, 95% CI 0.66-0.83; T vs. G: OR 0.72, 95% CI 0.66-0.79), but there were no other statistically significant associations with other gene polymorphisms. Our study suggested that SSc is associated with STAT gene rs7574865 polymorphism.     

Polymerase chain reaction based C4AQ0 and C4BQ0 genotyping: association with systemic lupus erythematosus in southwest Han Chinese

OBJECTIVE: To investigate the association of complement C4 null genes (C4Q0, including C4AQ0 and C4BQ0) and C2 gene with systemic lupus erythematosus (SLE) in southwest Han Chinese; 136 patients with SLE and 174 matched controls were genotyped. METHODS: C4 null genes were determined by a polymerase chain reaction (PCR) procedure with sequence specific primers (PCR-SSP). The 2 bp insertion in exon 29, which was previously identified in non-Chinese populations and caused defective C4A genes, was directly typed by sequencing the whole exon 29 using exon specific primers. The exon 6 of complement C2 was also sequenced in both the patients and controls. RESULTS: The frequency of homozygous C4AQ0 allele was 12.5% (17/136) in patients with SLE compared with 1.1% (2/174) in controls (p<0.001, odds ratio (OR)=12.286, 95% confidence interval (95% CI) 2.786 to 54.170). There was no significant difference for homozygous C4BQ0 allele between patients with SLE and controls (p=0.699). Patients with the C4AQ0 gene had an increased risk of acquiring renal disorder, serositis, and anti-dsDNA antibodies compared with those without C4AQ0 (for renal disorder, p=0.018, OR=8.951, 95% CI 1.132 to 70.804; for serositis, p=0.011, OR 4.891, 95% CI 1.574 to 15.198; for anti-dsDNA, p=0.004, OR 7.630, 95%CI 1.636 to 35.584). None of the patients or controls had the 2 bp insertion in exon 29 of the C4 gene. The type I C2 deficiency was not detected in the 310 samples. CONCLUSION: It is suggested that deficiency of C4A (not due to a 2 bp insertion in exon 29), but not C4B or C2, may be a risk factor for acquiring SLE in south west Han Chinese; this results in increased risk of renal disorder, serositis, and anti-dsDNA antibodies in patients with SLE. Racial differences seem to be relevant in susceptibility to SLE     

A meta-analysis of the association between cytokine gene polymorphisms and systemic sclerosis

Abstract

We conducted a comprehensive meta-analysis to quantitatively evaluate the association of cytokine gene polymorphisms with systemic sclerosis (SSc) susceptibility. Electronic databases were used to identify published studies before July 2011. In total, 23 case–control studies including 3524 SSc cases and 6086 healthy controls were included in the meta-analysis. We examined the relationship between five gene polymorphisms [cytotoxic T lymphocyte associated antigen 4 (CTLA-4) ?1722T/C, CTLA-4 ?318C/T, CTLA-4 +49A/G, angiotensin-converting enzyme I/D, STAT-4 rs7574865] and susceptibility to SSc. The combined odds ratio (OR) with 95% confidence interval (95% CI) was calculated to estimate the strength of the association in a fixed or random effect model. Heterogeneity and publication bias were also assessed. We found a significant association between SSc and STAT rs7574865 (TT vs. GG: OR 0.44, 95% CI 0.36–0.54; TT vs. TG + GG: OR 0.48, 95% CI 0.39–0.59; TT + TG vs. GG: OR 0.74, 95% CI 0.66–0.83; T vs. G: OR 0.72, 95% CI 0.66–0.79), but there were no other statistically significant associations with other gene polymorphisms. Our study suggested that SSc is associated with STAT gene rs7574865 polymorphism.