云南汉族人群CD80基因多态性与宫颈癌发生发展的相关性研究

目的探讨CD80基因多态性与云南汉族人群宫颈癌发生发展的相关性。方法本研究选取云南地区汉族人群癌前病变(CINⅢ期)患者126例,宫颈癌患者450例,健康体检人群500例,采用TaqMan探针基因分型方法对CD80基因中的4个SNP位点rs16829980(AG)、rs16829984(GC)、rs41271391(GT)和rs41271393(CT)进行基因分型,并研究其等位基因、基因型及所构建的单倍型在CINⅢ期患者、宫颈癌患者和健康对照人群中分布频率的差异。结果 rs16829984(GC)等位基因C和G在CINⅢ期组和对照组、癌症组和对照组中分布频率的差异具有统计学意义(P=0.026和0.006)。rs16829980(AG)中等位基因A和G在CINⅢ期组和癌症组中分布频率的差异具有统计学意义(P=0.038)。而rs41271391(GT)和rs41271393(CT)的等位基因和基因型在病例组(CINⅢ期组和癌症组)和对照组中的分布频率的差异无统计学意义(P0.05)。单倍型分析结果显示AGGC单倍型可能是宫颈癌发生的危险因素(OR=1.449;95%CI:1.096-1.915)。结论位于CD80基因启动子区域的SNP位点rs16829984(GC)等位基因C可能是云南汉族人群宫颈癌发生的保护性因素(OR=0.700;95%CI:0.510-0.960),rs16829980(AG)等位基因A可能是云南汉族人群CINⅢ期向宫颈癌发展的保护性因素(OR=0.703;95%CI:0.503-0.982)。     

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。     

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。     

CAT、CYBA及NIK基因与慢性阻塞性肺疾病及相关肺动脉高压易感性的关系

目的:探讨细胞色素b-245α多肽(CYBA)、过氧化氢酶(CAT)及核因子κB诱导激酶(NIK)基因单核苷酸多态性与宁夏地区汉族慢性阻塞性肺疾病(COPD)及相关肺动脉高压(PH)发病易感性的关系。方法:取稳定期COPD患者250例(包括COPD相关PH组103例和COPD非PH组147例)及同期健康对照组127例全血,用飞行质谱法检测CYBA基因rs1049255和rs9932581、CAT基因rs1001179和rs7943316及NIK基因rs7222094位点的基因型及等位基因频率。结论:(1)rs1001179位点基因型及等位基因频率分布在健康组和COPD组间差异有统计学显著性(P0. 05):与C等位基因相比,携带T等位基因的优势比(OR)=0. 21,95%置信区间(CI)为0. 10~0. 48。(2)rs1049255位点基因型与等位基因频率在COPD相关PH及COPD非PH组间差异有统计学显著性(P0. 05):与GG基因型相比,携带AA基因型的OR=2. 50,95%CI为1. 15~5. 46;与G等位基因相比,携带A等位基因的OR=1. 45,95%CI为1. 00~2. 08。(3)rs7222094位点等位基因频率在COPD相关PH及COPD非PH组间差异有统计学显著性(P0. 05):与C等位基因相比,携带T等位基因的OR=0. 31,95%CI为0. 21~4. 96。结论:CAT基因rs1001179位点T等位基因可能是COPD的保护因子,可降低COPD的发病风险。CYBA基因rs1049255位点GG基因型和G等位基因及NIK基因rs7222094位点T等位基因可能是COPD相关PH的保护因子,可降低COPD相关PH的发病风险。     

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。     

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。     

FFAR4基因多态性与藏族先天性心脏病关系的研究

目的:探讨游离脂肪酸受体4(FFAR4)基因多态性与藏族先天性心脏病(CHD)的关系。方法:选取103例藏族CHD患者和267例藏族健康对照者为研究对象,抽取外周血后提取基因组DNA,采用MassARRAY技术对FFAR4基因非编码区的5个候选标签单核苷酸多态性(tag SNP)位点(rs12219199、rs12220062、rs77999136、rs12243124和rs10882282)进行基因分型检测,在两组间进行基因型频率、等位基因频率和单体型分析。结果:筛选的5个候选tag SNP位点在样本中均符合Hardy-Weinberg平衡。(1)FFAR4基因rs10882282的等位基因C在两组间有显著差异(P0.05),rs12219199、rs12220062、rs77999136和rs12243124的基因型和等位基因频率在两组间无显著差异;(2)5个候选tag SNP位点间存在连锁不平衡,构成7类常见单体型;(3)携带rs10882282等位基因C的单体型CGCTC在两组间有显著差异(P0.05),与藏族CHD风险显著相关(OR=2.849,95%CI:1.400～5.798);(4)野生等位基因组成的单体型CGCTG在两组间有显著差异(P0.05),与降低藏族CHD风险显著相关(OR=0.702,95%CI:0.506～0.974)。结论:FFAR4基因非编码区rs10882282位点等位基因C是藏族CHD易感位点。单体型CGCTC可能为藏族CHD的危险因素;单体型CGCTG可能为藏族CHD的保护因素;携带等位基因C是可能的危险因素。FFAR4基因可能是CHD的易感基因。     

ETS1基因与中国北方汉族人群系统性红斑狼疮的相关性研究

目的 验证ETS1基因在北方汉族人群系统性红斑狼疮(systemic lupus erythematosus,SLE)发生中的作用.方法 应用病例-对照关联研究,在山东汉族人群中收集231例SLE患者和474名正常对照,采用Taqman探针对ETS1基因3’非翻译区区域单核苷酸多态位点rs1128334与rs4937333进行基因分型,并对数据进行统计学计算和单倍型分析.结果 rs1128334等位基因A在病例组中的频率显著高于对照组(42.8％ vs.29.1％,OR=1.824,95％CI:1.445～2.302,P＜0.01),rs4937333等位基因T在病例组中的频率显著高于对照组,差异具有统计学意义(47.6％ vs.38.1％,OR=1.478,95％CI:1.181～1.851,P＜0.01).两位点的单倍型分析显示单倍型A-T与SLE的发病风险显著相关(P＜0.05,OR=0.738,95％CI:0.564～0.964),而单倍型G-C可以显著降低SLE的发病风险(P＜0.01,OR=0.296,95％CI:0.232～0.378).结论 ETS1基因rs1128334和rs4937333位点与北方汉族人群系统性红斑狼疮相关.     

TNFRSF1A多态性与自身免疫性甲状腺疾病的相关性

目的评估黑龙江省齐齐哈尔地区汉族人群自身免疫性甲状腺病(autoimmune thyroid disease,AITD)与TNFRSF1A基因单核苷酸多态性(SNPs)rs4149576、rs4149577、rs4149570、rs1800693及rs767455的相关性。方法收集659例对照组和587例AITD患者,其中桥本甲状腺炎(HT)患者214例和Graves病(GD)患者373例。按照年龄和性别进行匹配。采用聚合酶链式反应(PCR)及连接酶检测反应(LDR)对rs4149576、rs4149577、rs4149570、rs1800693和rs767455进行基因分型,通过Haploview4.0计算SNPs的单倍型频率。同时,评估AITD与对照之间基因型和等位基因分布的95%置信区间(95%CI)比值比(OR)。将年龄和性别作为调节调整变量,通过多元逻辑回归模型计算调整ORs。结果 AITD患者与对照组TNTSSF1A基因中所有5个SNPs,等位基因和基因型分布均未发现显著差异(均P0.05)。进一步分析HT、GD患者与对照组5个TNFRSF1A SNPs等位基因和基因型频率均未发现显著差异(均P0.05)。单倍型分析发现ACGTT在AITD和对照组中最为常见。但其单倍型分布不存在显著差异。调整年龄和性别前,TNFRSF1A基因5个SNPs均与GD和HT无关(均P0.05);调整年龄和性别后,只有rs4149570多态性与HT轻度相关[OR(95%CI)=1.41(1.05-1.94),P=0.032]。有/无眼病GD患者TNFRSF1A基因多态性等位基因和基因型频率无显著差异(均P0.05)。结论 TNFRSF1A基因中5个SNPs与中国汉族人群AITD无关,但在调整性别和年龄后rs4149570显示与HT存在微弱相关性。     

Single nucleotide polymorphisms of HER2 related to osteosarcoma susceptibility

Aims: The purpose of this study was to investigate the correlation between single necleotide polymorphisms (SNPs) of human epidermal growth factor receptor-2 (HER2) gene with osteosarcoma susceptibility in Chinese Han population. Methods: 90 patients with osteosarcoma and 100 healthy controls who were frequency-matched with the former by age and gender were enrolled for a case-control study. 5 SNPs of HER2, namely rs2952155, rs1810132, rs2952156, rs1136201 and rs1058808, were tested by Sequenom time of flight mass spectrometry technique. The linkage disequilibrium and haplotype were analyzed using haploview software. The risk intensity of osteosarcoma was expressed by odds ratio (OR) with 95% confidence interval (CI) which was calculated by chi-squared text. Hardy-Weinberg equilibrium (HWE) was also evaluated by chi-squared text. Results: HER2 gene rs1136201 and rs1058808 polymorphisms were associated with the increased risk of osteosarcoma (P=0.04 and 0.02, respectively). Allele G in rs1136201 was 1.67 higher risk for osteosarcoma in cases than the control group (OR=1.67, 95% CI=1.11-2.51) and G allele of rs1058808 polymorphism also significantly increased osteosarcoma susceptibility (OR=2.06, 95% CI=1.27-3.22). The haplotype analysis showed that haplotype C-T-G-G might be a susceptible haplotype to osteosarcoma (OR=1.74, 95% CI=1.01-3.00). HWE test was eligible in controls (P>0.05). Conclusion: HER2 gene rs1136201 and rs1058808 polymorphisms and haplotype C-T-G-G may be related to osteosarcoma susceptibility in Chinese Han population, indicating that the interaction of gene polrmorphism plays an role in osteosarcoma risk.     

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.     

Asthma Endophenotypes and Polymorphisms in the Histamine Receptor HRH4 Gene

Background: Histamine as an inflammatory mediator plays an important role in chronic allergic and asthmatic conditions. However, the role of genetic polymorphisms of the histamine receptor HRH4 (histamine receptor H4) gene in asthma susceptibility and endophenotypes has not been studied yet. Our aim was to investigate the possible association between single nucleotide polymorphisms (SNPs) in the HRH4 gene and asthma or some endophenotypes of asthma. Methods: Twenty-one SNPs of the HRH4 gene were genotyped in 313 asthmatic patients and 360 controls using Sequenom? iPLEX? Gold Genotyping Technology. Results: Genotype distribution of three HRH4 SNPs, namely rs17187619 [p = 0.002; odds ratio, OR (95% confidence interval, CI) = 2.4 (4.1-1.4)], rs527790 [p = 0.0002; OR (95% CI) = 3.3 (6.1-1.8)] and rs487202 [p = 0.00007; OR (95% CI) = 3.5 (6.6-1.9)] differed significantly between patients with or without infection-induced asthma. Haplotypes, which included the rs4800573-rs527790 CC allele combination, were found to be associated with infection-induced asthma [p = 0.0009, OR (95% CI) = 0.5 (0.4-0.8)]. The rs487202-rs574913 CA haplotype was more frequent among patients with infection-induced asthma [p = 0.0006, OR (95% CI) = 1.9 (1.3-2.6)]. None of the SNPs contributed directly to the risk of asthma. Conclusions: Our results suggest that genetic variation in the HRH4 gene might influence the pathogenesis of infection-induced asthma.     

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.     

Increased expression of NKX2.3 mRNA transcribed from the risk haplotype for ulcerative colitis in the involved colonic mucosa

NKX2.3 is a promising candidate for susceptibility genes to inflammatory bowel disease (IBD). The aim of this study was to perform a candidate gene analysis of NKX2.3 in Japanese IBD and to examine how the risk allele (haplotype) affects susceptibility to IBD using allelic expression ratios of NKX2.3 mRNA in the involved colonic mucosa. A total of 344 patients with Crohn's disease (CD), 253 patients with ulcerative colitis (UC), and 243 healthy controls (HCs) were genotyped for 3 tag-single nucleotide polymorphisms (SNPs; rs10883365, rs888208, and rs11596008) around NKX2.3. The allelic expression ratio of NKX2.3-mRNA was examined by TaqMan assay using rs888208 as an allelic (haplotypic) marker. Two SNPs (rs10883365 and rs888208) were significantly associated with UC (p = 7.79 × 10(-4), odds ratio [OR] = 1.54 [95% confidence interval (95% CI) 1.20-1.99], p = 7.70 × 10(-3), OR = 1.41 [95% CI 1.10-1.81], respectively) and 1 SNP (rs10883365) was associated with CD (p = 0.0366, OR = 1.29 [95% CI 1.02-1.63]). Haplotype B formed by the 3 SNPs demonstrated a significant association with UC (p = 6.11 × 10(-4), OR = 1.56 [95% CI 1.21-2.00]). Subgroup analyses indicated that rs10883365 was significantly associated mainly with colonic CD (p = 1.99 × 10(-3), OR = 1.91 [95% CI 1.27-2.88], vs HCs). The allelic expression ratios of NKX2.3 mRNA transcribed from haplotype B (risk haplotype) to haplotype A (the nonrisk haplotype) in the involved mucosa from 10 IBD patients were significantly higher than the allelic ratio of respective genomic DNA (p = 0.00195). We confirmed the association of SNP rs10883365 located in the 5' flanking region of NKX2-3 with Japanese UC and colonic CD and determined the risk haplotype (haplotype B) for UC. The demonstrated allelic expression imbalance supports the idea that the risk haplotype of NKX2.3 confers susceptibility to UC through increasing expression of NKX2.3 mRNA in the colonic mucosa.     

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。     

Genetic variants of RANTES are associated with serum RANTES level and protection for type 1 diabetes

RANTES (regulated on activation, normal T-cell expressed and secreted) is a T-helper type 1 (Th1) chemokine that promotes T-cell activation and proliferation. RANTES is genetically associated with asthma, sarcoidosis and multiple sclerosis. The concentration of RANTES is increased at inflammation sites in different autoimmune diseases. Type 1 diabetes (T1D) is a Th1-mediated disease with complex genetic predisposition. We tested RANTES as a candidate gene for association with T1D using three single-nucleotide polymorphism (SNP) variants (rs4251719, rs2306630 and rs2107538) to capture haplotype information. The minor alleles of all SNPs were transmitted less frequently to T1D offspring (transmission rates 37.3% (P=0.002), 38.7% (P=0.007) and 41.0% (P=0.01)) and were less frequently present in patients compared to controls (P=0.009, 0.03 and 0.04, respectively). A similar protective effect was observed for the haplotype carrying three minor alleles (transmission disequilibrium test (TDT): P=0.003; odds ratio (OR)=0.55; confidence interval (CI): 0.37-0.83; case/control: P=0.03; OR=0.74; CI: 0.55-0.98). Both patients and controls carrying the protective haplotype express significantly lower serum levels of RANTES compared to non-carriers. Subsequently, we tested a cohort of 310 celiac disease patients, but failed to detect association. RANTES SNPs are significantly associated with RANTES serum concentration and development of T1D. The rs4251719*A-rs2306630*A-rs2107538*A haplotype associated with low RANTES production confers protection from T1D. Our data imply that RANTES is associated with T1D both genetically and functionally, and contributes to diabetes-prone Th1 cytokine profile.