TBX20基因启动子区的单核苷酸多态性与扩张型心肌病的相关性分析

目的:探讨TBX20基因启动子区的单核苷酸多态性(SNP)与扩张型心肌病(DCM)的相关性。方法:采用病例-对照研究方法,收集136例DCM患者和210例健康对照。采用PCR和Sanger测序的方法获得TBX20基因启动子区的SNPs。通过细胞转染和电泳迁移率变动分析(EMSA)对TBX20基因启动子区的SNPs进行遗传功能分析。采用卡方检验和两独立样本t检验对数据进行统计学分析。使用SNPStats在线软件进行相关性分析。结果:校正混杂因素后,rs73099190在共显性遗传模型和超显性遗传模型中的TC基因型和显性遗传模型中的TC+CC基因型均与DCM显著相关(OR=1.96,95%CI:1.20~3.20,P=0.019;OR=1.98,95%CI:1.22~3.24,P=0.006;OR=1.86,95%CI:1.15~3.03,P=0.012)。转染结果显示,TBX20基因启动子区的SNPs显著改变了TBX20基因启动子的转录活性(P<0.01)。进一步EMSA实验表明,rs1191745927和rs73099190影响了TBX20基因启动子与转录因子的结合。结论:DCM患者TBX20基因启动子的变异可能影响转录因子的结合,进而改变了TBX20基因的转录活性,可能作为罕见的低频危险因素促进DCM的发生发展。     

GATA5基因启动子序列单核苷酸多态性可增加急性心肌梗死的易感性

目的:通过病例-对照研究,探讨GATA结合蛋白5(GATA binding protein 5,GATA5)基因启动子序列单核苷酸多态性(single nucleotide polymorphism,SNP)与急性心肌梗死(acute myocardial infarction,AMI)的相关性。方法:通过χ~2检验、logistic回归、单倍型分析、细胞转染及电泳迁移率变动分析(electrophoretic mobility shift assay,EMSA)对SNPs进行遗传及功能分析。结果:校正混杂因素后,rs80197101位点GA和GA+AA基因型与AMI显著相关(OR=2.280,95%CI:1.027~5.061,P=0.043;OR=2.312,95%CI:1.045~5.116,P=0.039)。rs77067995位点CT和CT+TT基因型也与AMI显著相关(OR=2.280,95%CI:1.027~5.061,P=0.043;OR=2.312,95%CI:1.045~5.116,P=0.039)。rs80197101和rs77067995呈完美连锁不平衡,两者形成的单倍型AT在AMI组的频率显著高于对照组(χ~2=6.960,P=0.008)。EMSA及转染结果表明,这些SNPs通过影响转录因子与GATA5基因启动子的结合,显著增加GATA5基因启动子在HEK-293细胞和H9c2细胞中的转录活性(P<0.001)。结论:GATA5基因启动子序列中的rs80197101与rs77067995可显著增加AMI的易感性。rs80197101的等位基因A和rs77067995的等位基因T可能是AMI的危险等位基因,单倍型AT可能是AMI的危险单倍型。     

中国北方汉族人群VANGL1、FZD3和FZD6基因交互作用与神经管缺陷的关系

目的探讨VANGL1、FZD3和FZD6基因单核苷酸多态性(SNPs)位点间的交互作用对中国北方汉族人群神经管缺陷(NTDs)患病风险的影响。方法选取VANGL1基因2个SNPs(rs4 839 469和rs34 059 106),FZD3基因2个SNPs(rs2 241 802和rs28 639 533)以及FZD6基因3个SNPs(rs827 528、rs3 808 553和rs12 549 394),采用PCR扩增和测序的方法对135例NTDs患者和135例正常对照者进行基因分型,使用多因子降维法软件(MDR)分析基因-基因交互作用。结果 VANGL1基因rs4 839 469位点基因型分布在病例组与对照组之间有差异(P0.05),FZD6基因rs3 808 553位点基因型分布在病例组与对照组之间有差异(P0.05);MDR分析结果显示VANGL1、FZD3和FZD6基因交互作用存在于两位点模型(rs4 839 469-rs3 808 553)(OR=3.18,95%CI:1.85~5.44;χ2=18.39,P0.0001),3位点模型(rs4 839 469-rs2 241 802-rs3 808 553)(OR=4.17,95%CI:2.43~7.14;χ2=28.5,P0.0001)以及4位点模型(rs4 839 469-rs2 241 802-rs827 528-rs3 808 553)(OR=7.34,95%CI:3.98~13.54;χ2=45.3,P0.0001)。结论 VANGL1、FZD3和FZD6基因存在交互作用,并可能增加NTDs的发病风险。     

TBX21基因rs16947078位点的多态性与哮喘易感性的研究

目的研究TBX21基因的rs16947078位点的多态性与哮喘易感性的关系。方法应用基质辅助激光解吸附电离飞行时间质谱(MALDI-TOF-MS)平台及MassARRAY-IPLEX技术,分别对重庆地区汉族人群中199名正常对照组和223名哮喘患者组的TBX21基因rs16947078位点进行检测并分析其基因型及等位基因分布情况,研究TBX21基因rs16947078位点的多态性与哮喘易感性间的关系。结果 TBX21基因rs16947078位点基因型和等位基因在病例组与对照组间均存在显著差异,P值分别为0.010和0.011;对年龄和性别进行校正后,相对于AA基因型,AG基因型的人群患哮喘的风险增加(OR=9.433,95%CI:1.170~76.022);等位基因G的携带者患哮喘的风险也有所增加(OR=9.232,95%CI:1.152~74.006)。结论研究结果提示TBX21基因中rs16947078位点与哮喘的易感性相关。     

维吾尔族、汉族散发性乳腺癌BRCA1基因rs16941及rs16942位点多态性分析

目的探讨维吾尔族及汉族散发性乳腺癌BRCA1基因单核苷酸多态性(single nucleotide polymorphisms,SNPs)是否存在差异,并分析SNPs位点与肿瘤易感性的关系。方法选取100例散发性乳腺癌(维吾尔族、汉族各50例)及100例乳腺腺病(维吾尔族、汉族各50例)作为分析对象,对BRCA1基因rs16941及rs16942进行DNA测序。结果 rs16941及rs16942的AA、AG、GG基因型在维吾尔族、汉族乳腺癌组之间的分布差异有统计学意义(P=0.009,P=0.017)。肿瘤易感性比较:维吾尔族rs16941位点中AG与AA基因型相比,其能够降低乳腺癌的发病风险(OR=0.964,95%CI:0.260~3.583,P=0.009);维吾尔族rs16942位点中AG与AA基因型相比,其能够增加乳腺癌的发病风险(OR=1.017,95%CI:0.293~3.916,P=0.017)。汉族rs16941位点中AG与AA基因型相比,其能够降低乳腺癌的发病风险(OR=0.824,95%CI:0.210~3.234,P=0.044)。结论 rs16941及rs16942的AA、AG、GG基因型在维吾尔族、汉族乳腺癌组的分布,差异有统计学意义;SNPs与肿瘤易感性有相关性。     

Interleukin-18基因启动子区单核苷酸多态性与肝细胞癌遗传易感性关系的研究

目的探讨白细胞介素18(IL-18)基因启动子区-607C/A(rs1946518)和-137G/C(rs187238)单核苷酸多态性(SNP)与肝细胞癌(肝癌)遗传易感性的关系。方法应用序列特异性引物-聚合酶链反应(PCR-SSP)技术,检测228例肝癌患者和300例健康对照者IL-18基因启动子-607C/A(rs1946518)、-137G/C(rs187238)单核苷酸多态性位点基因型,分析肝癌患者和对照组基因型频率和等位基因频率分布。结果肝癌组SNP位点rs187238 G等位基因的频率明显高于对照组(OR=1.1891,95%CI=1.0106-1.5633,P=0.026)。携带rs187238 GG基因型的肝癌患者较多(OR=1.5168,95%CI=1.1490-1.8322,P=0.010)。分层分析发现,rs1946518位点上AA基因型与肝癌发病的关联在饮酒的肝癌患者中更加显著(P=0.024),而且rs187238位点上GC/CC基因型与肝癌发病的关联在出现肝癌复发的患者中更加显著(P=0.005)。结论 IL-18基因启动子区-137G/C(rs187238)GG基因型与肝癌遗传易感性有关联。而rs1946518位点AA基因型和rs187238位点GC/CC基因型分别与肝癌患者饮酒和肝癌复发有关联。     

兰州地区IL-15、IL-17A和IL-18基因多态性与复发性流产的相关性研究北大核心CSCD

目的:探讨IL-15、IL-17A和IL-18基因多态性与复发性流产(RSA)的关系。方法:SNaPshot法分析150例RSA患者(RSA组)和150例健康志愿者(对照组)中IL-15基因rs3806798、IL-17A基因rs2275913、IL-18基因rs1946518和rs187238位点多态性分布情况。结果:RSA组和对照组中4个单核苷酸多态性(SNPs)基因型频率和等位基因频率分布在两组间差异无统计学意义(P>0.05);隐性和显性遗传模式下对IL-15基因rs3806798、IL-17A基因rs2275913、IL-18基因rs1946518进行非条件Logistic回归分析,发现两组间差异均无统计学意义(P>0.05)。但IL-18基因的rs187238 SNP位点GG型、CG型、CC型3种基因型构成比在两组间差异有统计学意义(χ2=9.256,P=0.010)。显性、隐性遗传模式Logistic回归分析结果显示G等位型(GC+GG基因型)与RSA患病风险降低相关(χ2=4.303,OR=0.53,95%CI=0.29~0.97,P=0.038),但G等位基因不是RSA的保护性等位基因(χ2=2.275,OR=0.66,95%CI=0.38~1.14,P=0.132)。经连锁不平衡和单体型分析,rs1946518和rs187238存在完全连锁不平衡。TGTG单体型是RSA的保护因素,其OR(95%CI)=0.361(0.158~0.827)。结论:IL-18基因rs187238基因多态性与RSA患病风险相关。     

PD-1基因多态性与肺结核易感性的关系

目的探讨PD-1基因多态性与肺结核发病风险以及临床特征的相关性。方法采用PCRRFLP分析方法,检测262例肺结核患者和255例健康志愿者基因组DNA中PD-1基因SNP位点rs2227981和rs2227982基因型和等位基因频率的分布情况,分析PD-1基因多态性与肺结核易感性的关系;并收集了肺结核患者的临床资料,考察PD-1基因多态性与肺结核临床特征的相关性。结果对照组rs2227981和rs2227982基因型和等位基因频率的分布符合Hardy-Weinberg遗传平衡定律;rs2227981位点T等位基因(OR=2.721,95%CI:2.003~3.697,0.001)、rs2227982位点C等位基因(OR=1.614,95%CI:1.262~2.064,0.001)均与肺结核易感性相关;与rs2227981 CC基因型相比,携带PD-1 rs2227981 CT或TT基因型者具有更高的肺结核发病风险(OR=2.937,95%CI:2.018~4.274,0.001),且患者病灶范围较大(=0.009),痰菌阳性率较高(0.001);与rs2227982 TT基因型相比,携带rs2227982 TC或CC基因型者具有更高的肺结核发病风险(OR=1.706,95%CI:1.187~2.452,=0.004),且患者结核空洞的发生率较高(=0.021)。结论 PD-1基因rs2227981和rs2227982位点SNP多态性与肺结核易感性及临床特征相关。     

SH2B3基因标签单核苷酸多态性与汉族原发性高血压的关系

目的探讨SH2B衔接蛋白3(SH2B3)基因标签单核苷酸多态(SNPs)与汉族原发性高血压(EH)的关系。方法用聚合酶链式反应-限制性片段长度多态性方法(PCR-RFLP),对1 020例汉族人(EH患者和对照者各510例)SH2B3基因6个标签SNPs(rs7309325、rs11065898、rs10849947、rs2239196、rs2238154和rs739496)的多态性进行检测,运用遗传模型分析该基因与汉族EH的相关性。结果 rs2239196位点基因型和等位基因在EH组和对照组间的频率分布均具有显著性差异(Bonfferoni校正P0.05),Logistic回归分析结果显示T等位基因携带者的患病风险显著升高(OR=2.59,95%CI 1.36~4.96,Bonfferoni校正P0.05)。结论 SH2B3基因rs2239196位点T等位基因可能是汉族EH发生的危险因子。     

云南汉族ATP2B1基因标签SNPs与原发性高血压的关系

目的探讨Ⅰ型细胞膜钙离子转运酶(ATP2B1)基因标签单核苷酸多态(SNPs)与云南汉族原发性高血压(EH)的相关性。方法用聚合酶链式反应-限制性片段长度多态性方法,检测1020例云南汉族人(EH组和对照组各510例)ATP2B1基因12个标签SNPs(rs10506974、rs10506975、rs2854371、rs957525、rs3741895、rs2681472、rs2070759、rs12423192、rs1050395、rs11105357、rs11105358和rs7975689)和ATP2B1基因附近区域的rs17249754位点的多态性。结果 rs17249754位点基因型和等位基因频率在EH组和对照组间的分布均具有显著性差异(P0.01),Logistic回归分析发现,rs17249754位点AA基因型和A等位基因使EH患病风险显著性降低(OR=0.60,95%CI 0.40~0.89,校正P0.05;OR=0.73,95%CI 0.60~0.88,校正P0.01)。结论 ATP2B1基因附近区域rs17249754位点与云南汉族人群EH相关,rs17249754 A等位基因可能是降低云南汉族EH风险的保护因子。     

Association of PTEN gene polymorphisms with liver cancer risk

Objective: To find out if there are any relationship between three single nucleotide polymorphisms (SNPs) of phosphatase and tensin homolog (PTEN) gene (rs1234213, rs1234220, and rs2299939) and the susceptibility of liver cancer. Methods: Genotypes of the three SNPs in the PTEN gene were achieved utilizing polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. Comparison of genotypes and alleles distribution differences between the case and the control subjects was accomplished with χ² test. The analysis of linkage disequilibrium (LD) and haplotypes of the three SNPs was performed using SHEsis software. We adopted odds ratios (ORs) with 95% confidence intervals (95% CIs) to show the relative risk of liver cancer. Results: TC genotype and C allele of rs1234220 polymorphism showed much more frequently in cases than in controls, reflecting that the TC genotype and the C allele may be linked to the increased risk of liver cancer (OR=2.225, 95% CI=1.178-4.204; OR=1.941, 95% CI=1.124-3.351). Rs2299939 polymorphism showed an opposite result that the GT genotype probably reduce the risk of liver cancer (OR=0.483, 95% CI=0.259-0.900). Statistical significance was not found in the distribution differences of the genotypes of rs1234213 between two groups. LD and haplotype analysis results of the three SNPs showed that the T-C-G haplotype frequency was much higher in cases than in healthy objects, which proved that the T-C-G haplotype might be a susceptibility haplotype for liver cancer (OR=3.750, 95% CI=1.396-10.077). Conclusions: PTEN gene polymorphisms might relate to liver cancer risk.     

Association of genetic polymorphisms on BTNL2 with susceptibility to and prognosis of dilated cardiomyopathy in a Chinese population

Background: Dilated cardiomyopathy (DCM) is one type of primary myocardial disease, partly caused by immunity dysfunctions. BTNL2 (butyrophilin-like 2) has already been confirmed to be involved in the etiology of autoimmune disorders and GWAS (genome wide association study) has also identified mutants of a SNP (single nucleotide polymorphism) near BTNL2 could modulate risk of coronary heart disease (also cardiomyopathy). The current study, therefore, was aimed to investigate whether polymorphisms within or around BTNL2 would be correlated with susceptibility to and prognosis of DCM. Material and methods: Peripheral blood samples were gathered from 82 DCM patients and 75 healthy controls. Nine tag-SNPs within or near BTNL2 were obtained from HapMap Database and previously published studies. Eligible haplotypes were gained on the basis of SHesis software. Genotyping of SNPs was implemented with aid of Sequenom MassArray iPLEX platform and subsequently analyzed via MALDI-TOF mass spectrometry. The odd ratios and their 95% confidence interval (95% CI) were utilized to evaluate the correlations between SNPs/haplotypes and DCM risks. Finally, Cox proportional hazard models and Kaplan-Meier curves were performed to assess association of SNPs/haplotypes with prognosis of DCM patients. The statistical analyses were conducted with SPSS 19.0 software. Results: Under the allelic model, rs3763313 (A > C), rs9268494 (C > A), rs9268492 (C > G) and rs9268402 (A > G) were remarkably associated with susceptibility to grade IV of DCM classified by NYHA (New York heart association) (OR = 0.43, 95% CI: 0.22-0.84; P = 0.018; OR = 0.49, 95% CI: 0.27-0.91; P = 0.024; OR = 0.50, 95% CI: 0.27-0.94; P = 0.035; OR = 0.53, 95% CI: 0.28-0.97; P = 0.048). Haplotype C-C-A-T (rs9268492, rs9268494, rs3763313 and rs3763317 synthesized) was also regarded as a protective factor for DCM patients compared with carriers of other haplotypes (OR = 0.50, 95% CI: 0.26-0.97, P = 0.038). Moreover, the univariate survival analysis and multivariate Cox regression analysis both indicated noticeable correlations between rs9268402 and haplotype C-C-A-T and prognosis of DCM patients (NYHA IV), respectively (Long-Rank P = 0.029, HR: 0.241, 95% CI: 0.089-0.650, P = 0.005; Long-Rank P = 0.036; HR = 0.126, 95% CI: 0.035-0.457, P = 0.002). Nonetheless, rs3763313 was found only associated with prognosis of DCM patients (NYHA IV) expressed in the Kaplan-Meier curve (P = 0.009). Conclusion: The genetic mutations within or around BTNL2 (rs3763313, rs9268494, rs9268492 and rs9268402) could alter susceptibility to grade IV of DCM in a Chinese population, and the 2 SNPs (rs3763313 and rs9268402) therein added with haplotype C-C-A-T might separately predict the prognosis of DCM patients. However, additional studies regarding diverse ethnicities need to be furthered to validate our results.     

RTKN2、LDLR、APOB和APOC1基因多态性与类风湿性关节炎的相关性

目的：建立RTKN2基因rs3125734 C＞T、LDLR基因rs688 C＞T、APOB基因rs693 C＞T和APOC1基因rs4420638 A＞G四个SNP位点的PCR-HRM分子诊断方法,并研究其与兰州地区汉族人群类风湿关节炎易感的相关性。方法：通过设计引物和PCR-HRM检测体系优化,建立四个SNP位点的基因分型方法。检测588例RA患者和200例健康对照者标本,通过病例对照研究分析其RA易感性。结果：经测序验证所建PCR-HRM检测方法的正确性。结果显示,rs3125734和rs688位点的基因型和等位基因频率在RA组和对照组间存在统计学差异（P分别为0.046和0.016、0.014和0.02）,rs3125734杂合突变型CT在RA组与对照组间差异有统计学意义（χ2=4.013,P=0.045,OR=1.613,95% CI:1.010-2.576）,rs688纯合突变型TT在两组间有显著差异（χ2=6.853,P=0.009,OR=0.273,95% CI:0.103-0.721）。rs693和rs4420638位点基因型和等位基因频率在RA组和对照组间差异无统计学意义（P＞0.05）。经RF和anti-CCP将RA组分层后,rs4420638位点基因型和等位基因频率在RF(-)RA组与对照组间有统计学差异（χ2=4.710,P=0.030;χ2=4.110,P=0.043）,其杂合突变型AG在两组间存在显著差异（χ2=4.046,P=0.044,OR=1.799,95%CI：1.015-3.186）;rs693在各组间无显著差异（P＞0.05）。构建rs688和rs4420638单倍型,单倍型CA和TA在RA组和对照组间有显著差异(P=0.020,OR=1.408,95%CI：1.054-1.881;P=5.73×10-5,OR=0.443,95%CI：0.295-0.664)。 结论：建立的rs3125734、rs688、rs693和rs4420638位点PCR-HRM分子诊断方法可用于常规化检测。rs3125734、rs688和rs4420638位点是兰州地区汉族人群的RA易感基因,rs3125734位点CT基因型和rs4420638位点AG基因型是RA发病的危险因素,而rs688位点TT基因型是RA的保护性因素。rs688和rs4420638的单倍型CA可显著增加RA的发病风险,TA可降低RA的发病风险。     

Association of interleukin-10 promoter polymorphisms with systemic lupus erythematosus

Several lines of evidence suggest interleukin-10 gene (IL-10) is a candidate gene in susceptibility to systemic lupus erythematosus (SLE). We investigated the association of IL-10 promoter single-nucleotide polymorphisms (SNPs) (-3575T/A, -2849G/A, -2763C/A, -1082A/G, -819T/C and -592A/C) and microsatellites (IL10.R, IL10.G) with SLE in 554 Hong Kong Chinese patients and 708 ethnically matched controls. Six haplotypes (hts) were identified from the SNPs. The genotype distribution of the ht1 (T-C-A-T-A), which is associated with low IL-10 production, was different in patients and controls (P=0.009). The homozygous genotype of non-ht1 was significantly increased in patients (P=0.009, odds ratio (OR)=1.80, 95% CI: 1.15-2.82). The frequency of IL10.G4 of IL10.G was also significantly increased in patients (P=0.017, OR=2.53, 95% CI: 1.18-5.40). We found that the homozygous non-ht1 combined with short allele (CA repeat number < or =21) of IL10.G has a dose-dependent effect on SLE susceptibility: non-ht1/non-ht1 with homozygous short allele showed a higher OR (OR=4.11, 95% CI: 1.27-13.2, P=0.018) of association with SLE than the genotype of non-ht1/non-ht1 with heterozygous short/long allele (OR=2.98, 95% CI: 1.26-7.07, P=0.013) and homozygous long allele (OR=1.05, 95% CI: 0.62-1.78, P=0.848). The frequency of non-ht1 was significantly increased in patients with serositis (P<0.0001, OR=2.42, 95% CI: 1.55-3.80). In conclusion, the high expression promoter genotype is associated with SLE in Chinese.     

Genetic variants on chromosome 6p21.1 and 6p22.3 are associated with type 2 diabetes risk: a case-control study in Han Chinese

Recent genome-wide association studies have identified several single nucleotide polymorphisms (SNPs) on chromosome 6p21.1 and 6p22.3 as type 2 diabetes (T2D) susceptibility loci in the European and Japanese populations. However, these SNPs have not been well evaluated in Chinese population. Here, we performed a case-control study with 2925 T2D cases and 3281 controls in a Chinese population. We used TaqMan OpenArray and Sequenom MassARRAY to genotype the four SNPs (rs4712523, rs7756992, rs4712524 and rs6931514) in CDKAL1 (cyclin-dependent kinase 5 regulatory subunit-associated protein 1-like 1) at 6p22.3 and one SNP (rs9472138) near vascular endothelial growth factor A (VEGFA) at 6p21.1. All the five SNPs were significantly associated with T2D risk with overall effects (odds ratio, OR) from 1.19 to 1.29 in the additive genetic model (rs6931514: OR=1.29, 95% confidence intervals (95% CI)=1.19-1.39, P=5.6 × 10(-10); rs7756992: OR=1.23, 95% CI=1.15-1.32, P=1.2 × 10(-8); rs4712523: OR=1.25, 95% CI=1.15-1.35, P=3.8 × 10(-8); rs4712524: OR=1.24, 95% CI=1.15-1.35, P=6.8 × 10(-8); rs9472138: OR=1.19, 95% CI=1.05-1.34, P=006). Conditional analysis identified two independent signals (rs6931514 at 6p22.3 and rs9472138 at 6p21.1) that were significantly associated with T2D. Compared with the wild homozygote of rs6931514 and rs9472138, subjects with variant alleles of the two SNPs had increased risk for T2D susceptibility in a dose-response manner (P(trend)=7.4 × 10(-12)). Our findings indicated that genetic variants of CDKAL1 and VEGFA on chromosome 6 may contribute to T2D risk in Chinese population, especially for rs9472138 at 6p21.1 identified for the first time to significantly increase the T2D risk in Chinese individuals.     

Association analysis of BANK1 gene with psoriasis in Southern Han Chinese

Psoriasis is a chronic inflammatory skin disease with an immunogenetic background. This study aimed to determine the association between three functional SNPs of BANK1 (rs10516487, rs17266594 and rs3733197) with psoriasis in Southern Han Chinese population by determining their frequency in 242 patients with psoriasis and 317 healthy individuals. The genotype frequencies of the detected polymorphisms were analysed in relation to the susceptibility of psoriasis. Our data show that there is no significant difference in genotype distribution for the three BANK1 SNPs between patients and healthy controls. The AA frequency of rs3733197 is significantly higher in patients with psoriasis onset before the age of 23 than in those with late disease onset (P = 0.0069). In addition, analysis on BANK1 haplotype also suggests a protective role for TGC and CAT haplotype from psoriasis (OR 0.55, 95% CI: 0.34-0.89; P = 0.0144; OR 0.62, 95% CI: 0.42-0.92; P = 0.0175), whereas CGT haplotype is associated with increased risk of the disease (OR 1.38, 95% CI: 1.05-1.81, P = 0.0203). Overall, our result indicates that polymorphism in BANK1 is associated with susceptibility to psoriasis in Southern Han Chinese.     

Promoter polymorphism of matrilin-1 gene predisposes to adolescent idiopathic scoliosis in a Chinese population

Adolescent idiopathic scoliosis (AIS) is widely recognized as a complex disorder with a strong genetic predisposition. In previous studies, a number of extracellular matrixes (ECMs) related genes have been duplicated as candidate genes for AIS. Matrilin-1 plays an important role in the organization of the ECM, and matrilin-1 gene (MATN1) mutant mice showed similar phenotypes to scoliosis. We hypothesized that MATN1 was a candidate predisposition gene for AIS. A gene-based association study was conducted using seven tagging SNPs identified from the HapMap data. For initial screening, the seven tagSNPs were genotyped in 197 cases and 172 controls. Next, we validated any significant association in an additional sample of 222 cases and 288 controls. In addition, another 290 controls were genotyped to confirm the results. We found that allele G of rs1149048 was a significant predisposition allele of AIS (P=0.0007, odds ratio (OR)=1.35 within 95% confidence interval (CI)=1.14-1.61), and individuals with genotype GG had a higher risk for AIS compared with AA+AG (P=0.0001, OR=1.61 within 95% CI=1.25-2.08). Polymorphism of rs1149048 was also associated with curve severity in AIS patients. Also, a significantly higher maximum Cobb angle was found in patients with GG genotype (P=0.002). We concluded that the tagSNP rs1149048 polymorphism in the MATN1 promoter region was associated with both susceptibility and disease progression in AIS.     

Genetic variation in miR-100 rs1834306 is associated with decreased risk for esophageal squamous cell carcinoma in Kazakh patients in northwest China

MicroRNAs (miRNAs) are a family of small noncoding RNAs that act as oncogenes and tumor suppressors. Single nucleotide polymorphisms (SNPs) in miRNAs may be associated with changes in phenotype and function. The aim of this study was to verify whether genetic variations in candidate microRNA (miRNA or miR) genes could contribute to esophageal squamous cell carcinoma (ESCC) susceptibility. A case-control study in 248 Kazakh patients with ESCC and 300 frequency matched control subjects was carried out to examine the potential association of six miRNA (miR-100 rs1834306, miR-34b/c rs4938723, miR-375 rs6715345, miR-146a rs2910164, miR-423 rs6505162 and miR-373 rs12983273) polymorphisms with risk of ESCC. We found that miR-100 rs1834306 T>C polymorphism was associated with a significant decreased risk of ESCC. In the recessive model, when the miR-100 rs1834306 TT/TC genotypes were used as the reference group, the CC homozygote genotype was associated with a significant decreased risk for ESCC (adjusted OR=0.495, 95% CI: 0.349-0.702, P=8.05×10^-5). In the dominant model, when the miR-100 rs1834306 TT genotypes was used as the reference group, the TC/CC genotype were associated with a borderline statistically decreased risk for ESCC (adjusted OR=0.665, 95% CI: 0.430-1.031, P=0.067). In addition, the miR-100 rs1834306 C allele in the Kazakh population was significantly associated with decreased risk of ESCC (OR=0.609, 95% CI: 0.48-0.78, P=8.37×10^-5). These findings indicated that functional polymorphism miR-100 rs1834306 C>T might contribute to decreased ESCC risk.