GATA6基因启动区多态性与急性心肌梗死患者易感性和临床特征的相关性分析

目的探讨GATA6基因启动区-493(rs144923558)G/A、-172(rs146748749)G/A 2个位点单核苷酸多态性(SNP)与急性心肌梗死(AMI)之间的关系及其相关的危险因素。方法采用病例-对照研究方法,收集328例AMI患者和344例正常对照;应用聚合酶链反应-限制性内切酶片段长度多态性技术结合DNA测序后的序列比对进行数据统计;运用Hardy-Weinberg平衡检验后,应用χ~2检验进行相关分析;利用Logistic回归对多种危险因素以及2个SNP位点与AMI发病进行关联性分析;利用Haplovview4.2软件和SHEsis网站进行连锁不平衡及单倍体分析。结果 2个SNP位点共检测出3种基因型为GG、GA和AA,其基因型分布均符合Hardy-Weinberg平衡(P0.05),同时在AMI组与对照组间差异无显著性(P0.05)。多因素Logistic回归分析:增龄、高血压病、吸烟、低密度脂蛋白胆固醇(LDLC)和甘油三酯(TG)升高是AMI发病的独立危险因素(P0.05),HDLC为保护因素(P0.05)。在显性、隐性和加性3种不同遗传模式下进行Logistic回归分析发现,2个SNP位点与AMI发病无关联性。进行连锁不平衡和单倍型分析提示,该2个SNP位点处于同一个连锁不平衡区域(D′=1.000,r~2=1.000),单倍型GG和AA均未增加AMI易感性(P0.05)。结论 GATA6基因启动区-493(rs144923558)G/A与-172(rs146748749)G/A两个SNP位点为完全连锁不平衡,其中GG为主要单倍型。该2个SNP位点及其单倍体型与AMI发病无相关性,但提供了GATA6基因启动区多态性的群体遗传学资料。     

PPAP2B基因单核苷酸多态性与冠心病的关联研究

目的研究PPAP2B基因单核苷酸多态性(SNP)位点与中国汉族人冠心病(CHD)发病的相关性。方法共收集525例CHD患者和650例正常对照(NC),采用病例-对照关联研究的方法 ,选取PPAP2B基因的4个标签SNP,包括已有报道的rs17114036位点,采用单碱基延伸法(SNaPshot)进行基因分型,并分析其与冠心病的相关性。结果 PPAP2B基因4个标签SNP:rs6588635、rs17114036、rs2404715和rs17407790的基因型分布均符合Hardy-Weinberg平衡(P>0.05)。其等位基因频率在CHD组与NC组间有显著差异(rs6588635P=0.00167、rs17114036P=0.00581、rs2404715P=0.0174、rs17407790P=0.00124)。通过单倍体型分析发现,这4个SNP位点处于同一个连锁不平衡区域,其中风险单倍体型TACC可以增加冠心病易感性0.73倍(P=0.0012),而保护型的单倍体型CGTT可降低冠心病的患病风险47%(P=0.0025)。结论 PPAP2B基因SNP位点与冠心病发病显著相关,其危险等位基因可增加冠心病的易感性。     

GABAA受体基因多态性与癫痫易感性的关系

目的探究γ-氨基丁酸A型(GABAA)受体的亚基基因GABRG2和GABRB2单核苷酸多态性(SNP)与癫痫(EP)易感性的关系。方法应用限制性片段长度多态性(RFLP)技术对GABAA受体亚基基因GABRB2(rs12653921、rs2964773)、GABRG2(rs2268581)3个标签单核苷酸多态性(Tag SNP)的等位基因和基因型测定分析。结果 EP组和对照组等位基因频率和基因型分布比较,SNP(rs12653921)位点(基因型χ2=8.651,等位基因χ2=8.649)有统计学意义;SNP(rs2268581)、SNP(rs2964773)位点(rs2268581:基因型χ2=0.354,等位基因χ2=0.294;rs2964773:基因型χ2=1.397,等位基因χ2=0.643)无显著差异(P0.05)。结论 SNP(rs12653921)可能与EP易感性相关,SNP(rs2268581)、SNP(rs2964773)可能与EP易感性不相关。     

尾加压素Ⅱ基因多态性与多囊卵巢综合征相关性的研究

目的 探讨尾加压素Ⅱ(UTS2)基因多态性与多囊卵巢综合征(PCOS)发病的关系.方法 用熔解温度不同的基因分型法.检测PCOS患者101例(PCOS组)及其父母202名和105名健康妇女(对照组)UTS2基因rs228648、rs2890565位点单核苷酸多态性(SNP),并检测基础状态下FSH、LH、睾酮、空腹血糖、空腹胰岛素水平.结果 PCOS组的UTS2基因rs228648 A/G多态性位点与对照组比较,基因型与等位基因频率均无明显差异,两组的SNP rs2890565基因型频率差异有统计学意义(P<0.05),PCOS组A等位基因频率明显高于对照组(P<0.05).传递不平衡检验(TDT)显示,SNP rs228648A/G在杂合子父母的2个不同等位基因无优势传递(P>0.05),而rs2890565 A/G在杂合子父母A等位基因优势传递(P<0.05).PCOS组UTS2基因SNP rs228648 GG基因型较携带A等位基因的PCOS患者稳态模型评估的胰岛素抵抗指数(HOMA-IR)明显增高(P<0.05).SNP rs2890565从和AG基因型空腹血糖、空腹胰岛素较GG基因型明显增高,从基因型HOMA-IR较GG基因型明显增高(P<0.05).结论 UTS2基因SNP rs228648 A/G多态性与PCOS无相关性,但与胰岛素抵抗存在关联.UTS2基因SNP rs2890565可能在PCOS的遗传易感性中起一定作用,A等位基因可能与PCOS的发生有关.     

骨保护素和RANKL基因单核苷酸多态性对类风湿关节炎易感性及其骨密度和疾病活动性的影响

目的 探讨骨保护素基因(TNFRSF11B) 1181G＞C(rs2073618)、163A＞G(rs3102735)位点和核因子κB活化因子受体配体(RANKL)基因(TNFRSF 11)401A＞G (rs2277438)位点单核苷酸多态性(SNP)对类风湿关节炎(RA)疾病易感性及其骨密度和疾病活动性的影响.方法 采用连接酶检测反应(LDR)聚合酶链反应(PCR)方法检测200例RA患者和201名健康对照组骨保护素基因rs2073618、rs3102735位点和RANKL基因rs2277438位点SNP;采用双能X线骨密度仪(DEXA)法测定其股骨和腰椎部位骨密度.比较其等位基因分布频率、基因型频率及单倍体型在2组中的分布,并比较不同基因型RA患者骨密度及疾病活动性的差别.统计学方法采用方差分析,t检验和x2检验.结果 ①骨保护素基因rs2073618位点、rs3102735位点和RANKL基因rs2277438位点各等位基因及基因型分布频率在RA组与对照组中差异均无统计学意义(P＞0.05).3个位点单倍体型研究表明:骨保护素和RANKL基因单倍体型(rs2073618G-rs2277438G-rs3102735G)携带者RA疾病易感性明显降低(1.5％与6.0％,OR:0.216,95％CI:0.081～0.575,P=0.0008),骨保护素和RANKL基因单倍体型(rs2073618G-rs2277438A-rs31 02735G)携带者RA易感性明显增加(14.5％与8.4％,OR:1.862,95％CI:1.179～2.943,P=0.007).②RANKL基因rs2277438位点表达为纯合型(AA和GG型)的RA患者(62例)腰椎3(1.05±0.22与0.93±0.26,t=2.314,P=0.023)、腰椎4(1.06±0.24与0.94±0.28,t=2.207,P=0.030)、腰椎2～4(1.04±0.21与0.89±0.28,t=2.788,P=0.007)部位骨密度均明显高于杂合型(AG型)RA患者(39例);骨保护素基因rs2073618和rs3102735位点不同基因型RA患者间骨密度差异无统计学意义(P＞0.05).③骨保护素基因rs2073618位点表达为纯合型(CC、GG型)的RA患者(60例)在以下疾病活动性指标上明显高于表达为杂合型(CG型)的RA患者(40例):压痛关节数(13±7与10±6,t=2.154,P=0.034)、压痛关节指数(19±11与13±9,t=2.318,P=0.023)、疼痛视觉模拟(VAS)评分(5.7±1.9与4.8±1.8,t=2.481,P=0.015).RANKL基因rs2277438位点、骨保护素基因rs3102735位点不同基因型RA患者间各疾病活动性指标差异无统计学意义(P＞0.05).结论 骨保护素基因rs2073618、rs3102735位点和RANKL基因rs2277438位点SNP与中国籍汉族RA患者易感性无关,但骨保护素和RANKL基因单倍体型(rs2073618G-rs2277438G-rs3102735G)为RA的保护性因素,而单倍体型(rs 2073618G-rs2277438A-rs31 02735G)是危险因素.RANKL基因rs2277438位点SNP与RA骨代谢相关;骨保护素基因rs2073618位点SNP与RA患者疾病活动性相关.     

Pitx3基因多态性与帕金森病易感性的相关性研究

目的探讨Pitx3基因多态性与帕金森病(PD)易感性的关系。方法选择江苏地区汉族的215例PD患者作为PD组,同期选择健康体检者250例作为对照组,利用多重连接酶链反应方法,检测2组Pitx3 2个单核苷酸多态性(SNP)位点rs2281983和rs3758549基因分布,分析各基因型、等位基因频率、单倍型与PD易感性的关系。结果 PD组与对照组Pitx3基因SNP位点rs2281983的CC、CT和TT基因型(6.5%vs 7.2%,42.3%vs 41.2%,51.2%vs 51.6%,χ2=0.274,P=0.717)和等位基因频率(χ2=0.159,P=0.423)分布比较,差异无统计学意义。PD组与对照组rs3758549的CC、CT和TT基因型(57.8%vs 66.4%,34.4%vs 29.2%,7.9%vs 4.4%,χ2=9.144,P=0.023)和等位基因频率(χ2=10.138,P=0.011)分布比较,差异有统计学意义。2组Pitx3基因C-C、C-T单倍型分布比较,差异无统计学意义(P>0.05);与对照组比较,PD组T-T单倍型增加PD易感性(OR=1.299,95%CI:1.003¹.863,P=0.048)。结论江苏地区汉族人群中,Pitx3基因的rs3758549位点基因型分布和等位基因频率与PD易感性之间有显著关联性,Pitx3基因的单倍型TT可能与PD易感性相关。     

补体C5基因单核苷酸多态性与肝细胞癌易感性关系的研究

目的探讨中国华北地区乙型肝炎患者补体C5单核苷酸多态性(single-nucleotide polymorphisms,SNP)与肝细胞癌(hepatocellular carcinoma,HCC)易感性的关系。方法采用Mass ARRAY TM Analyzer技术平台进行C5 rs17611、rs25681及rs2300929 3个SNP的多态性基因型检测,并进行风险度分析、连锁不平衡及单倍型分析,探讨3个SNP与HCC易感性的关系。结果与对照组比较,HCC组中rs17611位点等位基因G、rs25681位点等位基因C及rs2300929位点等位基因C可明显增加HCC的发病风险[P0.05,OR(95%CI)1];单体型为rs17611G-rs25681C-rs2300929C可增加HCC发病风险(OR=3.708,95%CI:1.578~8.712),单体型为rs17611A-rs25681T-rs2300929T可减少HCC的发病风险(OR=0.525,95%CI:0.303~0.909)。结论 C5rs17611、rs25681及rs2300929 3个位点的基因多态性与HCC易感性有关,可作为筛查HCC好发的危险因素。     

Lp-PLA2基因多态性与急性心肌梗死患者的易感性和临床特征的相关性研究

目的探讨脂蛋白相关磷脂酶A2(Lp-PLA2)基因多态性与急性心肌梗死(AMI)易感性之间的关系。方法选取2017年1月～2018年2月于西安交通大学医学院第一附属医院住院的AMI患者176例(AMI组)以及健康体检志愿者191例(对照组),采集受试者血清标本,采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术检测Lp-PLA2基因rs1805017、rs16874954、rs1051931位点单核苷酸多态性(SNP);采用Logistic回归分析Lp-PLA2基因突变与AMI易感性的相关性。结果 rs1805017位点检测到GG、GA、AA三种基因型;rs16874954位点检测到CC、AC两种基因型;rs1051931位点检测到AA、AC、CC三种基因型;AMI组rs1805017位点AA基因型以及rs16874954位点CC基因分布频率相对对照组更高(P0.05)。rs1805017位点GA+AA基因型患者三酰甘油(TG)水平高于GG基因型患者,而高密度脂蛋白胆固醇(HDL-C)水平明显低于GG基因型患者(P0.05);rs16874954位点AC基因型患者TG水平明显高于CC基因型患者(P0.05);其余血脂水平在不同基因型患者之间并无统计学差异(P0.05)。经单因素二元Logisitic回归分析,rs1805017(OR=0.788,95%CI:0.713～0.923,P0.05)、rs16874954(OR=0.923,95%CI:0.859～0.983,P0.05)位点SNP与AMI密切相关。多因素回归分析结果表明rs1805017位点多态性与AMI发病独立相关(OR=0.839,95%CI:0.804～0.975,P0.05)。结论本研究人群Lp-PLA2基因rs1805017、rs16874954多态性位点与急性心肌梗死的发生有关,而rs1051931位点SNP与AMI的发生可能无直接相关性。     

造血干细胞表达同源盒基因与妊娠期糖尿病的易感性分析

目的探讨我国中部地区人群中造血干细胞表达同源盒(HHEX)基因多态性与GDM易感性的关系。方法采用病例对照研究,选取GDM患者311例(GDM组)和正常糖耐量的孕妇345名(GNGT组)。采用PCR-RFLP方法检测两个SNP位点多态性分布。结果GDM组TG、FPG以及HbA1c水平均高于GNGT组(P0.05)。HHEX基因SNP位点rs5015480基因型(CC、CT、TT)及等位基因频率与GNGT组比较,差异有统计学意义(χ2=7.623,P=0.022;χ2=5.803,P=0.016),携带CC基因型人群GDM的风险比其他基因型风险高(OR3.899,95%CI1.808~8.409)。而SNP位点rs1111875基因型(GG、GA、AA)以及等位基因频率与GNGT组比较,差异均无统计学意义(χ2=3.151,P=0.207;χ2=1.671,P=0.196)。SNP位点CC基因型患者TG水平高于其他基因型患者(t=2.401,P=0.027);不同基因型HDL-C,LDL-C、FPG及HbA1c水平比较,差异无统计学意义(P0.05)。结论 HHEX基因SNP位点rs5015480与GDM的易感性相关,且该位点多态性可能与TG水平有关。     

NOS2基因多态性与抗结核药物所致肝损伤易感性的相关性研究CSCD

目的探讨抗氧化通路酶系NOS2基因多态性与抗结核药物所致肝损伤（anti-tuberculous drug induced liver injury,ATDILI）易感性的相关性。方法采用生物信息统计学方法筛选出NOS2基因16个tagSNP（Hardy-Weinberg平衡P〉0.001,最小等位基因频率〉0.1,r2〉0.8）,采用SNPscan？多重SNP分型技术对461例ATDILI患者和466例非ATDILI患者的DNA样本进行基因分型,分析这些位点基因型和单倍型在病例组和对照组之间的频率差异,分析在显性、隐性和加性遗传模型下各个SNP位点与ATDILI易感性的关联性。结果所有位点的等位基因频率分布均符合Hardy-Weinberg平衡。NOS2基因rs9906835 G/A基因型、rs944725 T/C基因型、rs3794763 G/A基因型、rs3794764 G/A和A/A基因型以及rs6505469 T/A基因型均可增加ATDILI易感性（均P〈0.05）,在显性遗传模型下,rs9906835、rs944725、rs3794763、rs3794764以及rs6505469可增加患者抗结核治疗后发生肝损伤的风险（均P〈0.05）;在加性遗传模型下,rs944725、rs3794763和rs3794764增加ATDILI发生的风险（均P〈0.05）。单倍型分析显示NOS2基因CGCATT、AC和AAA单倍型均可增加ATDILI发生的风险（均P〈0.05）。结论NOS2基因为ATDILI的易感基因。     

Lack of association between tyrosine kinase 2 (TYK2) gene polymorphisms and susceptibility to SLE in a Japanese population

Tyrosine kinase 2 (TYK2) is a type I interferon (IFN) signaling pathway gene and was previously reported to be a risk factor for systemic lupus erythematosus (SLE) in Caucasian populations. In order to test for its genetic association with SLE in a Japanese population, TYK2 single nucleotide polymorphisms (SNPs), rs2304256, rs12720270 and rs280519, were genotyped. A case–control association study was performed in a total of 411 Japanese SLE patients and 467 healthy controls. Linkage disequilibrium (LD) among TYK2 SNPs was examined. According to the data from 94 healthy controls, non-synonymous rs2304256 resulting in Val → Phe substitution was revealed to be in a LD with rs12720270 and rs280519. Therefore, we further genotyped rs2304256 as a tag SNP in the full sample sets. As a result, no differences in genotype distribution and allelic frequencies of rs2304256 were found between SLE patients and healthy controls. In conclusion, TYK2 is not a genetic risk factor for SLE in a Japanese population. Our result suggests that there is an ethnic difference in the susceptibility genes for SLE.     

FCRL5基因多态性对安徽省汉族人群强直性脊柱炎易感性及临床表现型的影响

目的 探讨FCRL5基因中rs6427384和rs12036228位点单核苷酸多态性(SNP)对强直性脊柱炎(AS)易感性和临床表现型的影响。方法 收集安徽汉族人群AS患者169例和健康对照184名,采用基于高温连接酶的连接酶检测反应( LDR)—聚合酶链反应(PCR)方法检测其FCRL5基因中rs6427384和rs12036228位点的SNP,分析比较其等位基因频率及基因型频率在患者组和对照组中的分布,并比较不同基因型AS患者的临床表现型的差别。采用x2检验和方差分析进行统计学处理。结果 AS患者组和对照人群中rs6427384位点C等位基因频率(17.3％,25.0％)和T等位基因频率(82.7％,75.0％)及rs12036228位点C等位基因频率(92.3％,87.2％)和T等位基因频率(7.7％,12.8％)分布差异均有统计学意义(P＜0.05)。FCRL5基因rs6427384位点CC、CT和TT基因型频率在AS组（3.7％、27.2％和69.1％）和对照组（3.9％、42.2％和53.9％）之间的分布差异有统计学意义(-8.7637,P=0.0 125)。AS患者组rs6427384位点各基因型间骶髂关节X线分期(x2=34.159,P=0.0001)、疾病首发症状（腰痛或外周关节炎）发生率(x2=7.254,P=0.027）、晨僵持续时间(F=4.159,P=0.018)、Bath AS疾病活动指数(BASDAI)平均积分(F=4.461,P=0.014)差异均有统计学意义。AS患者组rs12036228位点各基因型间仅在疾病首发症状上有明显不同（=6.640,P=0.036）。结论 安徽籍汉族人群AS易感性与FCRL5基因rs6427384和rs 12036228位点单核苷酸多态性有关;其基因型的不同对AS的临床表现型有影响。     

Polymorphisms in PDE4D are Associated with a Risk of COPD in Non-Emphysematous Koreans

Despite extensive effort, only a few chronic obstructive pulmonary disease (COPD)-associated genes have been suggested, indicating that there must be additional risk-associated loci. Here we aimed to identify additional COPD-associated SNPs and to explore the potential relationship between COPD subgroups and the SNPs in the Korean population. We performed a genome-wide association study (GWAS) with 990 Korean individuals; 102 COPD cases and 544 controls for GWAS using Affymetrix SNP array 5.0, and 173 COPD cases and 171 controls for replication. After validating the candidate single nucleotide polymorphisms (SNP), we performed subgroup analysis by disease phenotype. Through GWAS, we identified a novel SNP in the phosphodiesterase-4D (PDE4D) gene [rs16878037 (C>T), p = 1.66 ? 10^?6] that was significantly associated with COPD. This signal in PDE4D was successfully replicated in the independent set (p = 0.041). When we combined the discovery and replication data, the association signal became more significant (p = 5.69 ? 10^?7). In the COPD subgroup analysis, the T allele of rs16878037 was significantly more frequent in COPD patients without severe diffusion capacity impairment (mild mixed and obstruction-dominant group) than in patients with severe impairment (severe mixed and emphysema-dominant groups). This result supports that PDE4D polymorphisms might be involved in the susceptibility to COPD especially in non-emphysematous individuals and that they could also affect the responsiveness of the PDE4 inhibitor treatment.     

5-羟色胺受体4基因多态性与汉族人群慢性阻塞性肺疾病的关联性研究

目的 研究5-羟色胺受体4（HTR4）基因多态性与汉族人群慢性阻塞性肺疾病（COPD）及肺功能指标的相关性.方法 采用病例对照的研究方法,用聚合酶链反应-限制性片段长度多态性（PCR-RFLP）方法对126例COPD患者及110例健康对照者的单核苷酸多态性（SNP）位点rs3995090进行基因分型,并分析该SNP位点与COPD、第1秒用力呼气容积（FEV1）及FEV1/用力肺活量（FVC）相关性.结果 SNP位点rs3995090基因型频率均符合Hardy-Weinberg平衡定律（P＞0.05）.rs3995090在COPD患者中最小等位基因频率A为34％,在健康人群中为25％,组间比较差异有统计学意义（P＜0.05）.在COPD患者及健康对照者中,rs3995090基因型与FEV1值之间均存在相关性（P均＜0.05）.结论 HTR4基因多态性可能与汉族人群COPD的发病及肺功能指标FEV1值之间存在关联性.     

支气管哮喘患者白三烯基因多态性与抗白三烯治疗的相关性研究

目的 检测温州地区汉族人支气管哮喘(简称哮喘)患者白三烯酶基因多态性的分布频率,探讨酶基因多态性与孟鲁司特治疗的相关性.方法 采用基质辅助激光解吸附电离飞行时间质谱法,对60例温州汉族哮喘患者(哮喘组)及61名健康者(对照组)的6个白三烯酶基因多态性位点进行检测.依据基因检测结果选取基因白三烯C4合成酶LTC4S(rs730012)CC+AC型11例与从型11例,观察孟鲁司特治疗4周后的肺功能和尿白三烯E4的变化.结果 (1)6个基因位点[5脂氧酶ALOX5(rs2115819、rs4986832、rs4987105)、白三烯A4水解酶LTA4H(rs2660845)、5脂氧酶结合蛋白ALOX5AP(rs10507391)和LTC4S(rs730012)]的变异频率均＜50%,单体型组间分布差异均无统计学意义(均P＞0.05).(2)基因ALOX5(rs2115819、rs4986832、rs4987105)和LTA4H(rs2660845)等位点变异等位基因频率组间比较差异均无统计学意义(OR值分别为1.1 12、0.964、0.964、0.673,均P＞0.05),变异等位基因OR值95%可信区间(95%CI)均包括无效值(OR=1.0).上述位点基因型组间比较差异均无统计学意义(χ2值分别为0.792、2.684、2.683、2.524,均P＞0.05).(3)基因ALOX5AP(rs10507391)位点在两组间存在差异,哮喘组变异等位基因A频率为23.3%(OR=2.016,95%CI为1.027～3.959,P＜0.05).基因LTC4S(rs730012)位点在两组间存在差异,哮喘组变异等位基因C频率为25.0%(OR=1.926,95%CI为1.007～3.685,P＜0.05).(4)孟鲁司特治疗4周后,基因LTC4S(rs730012)CC+AC型者的FEVl提高(t=6.185,P＜0.01),晨尿LTE4下降(t=2.925,P＜0.05).AA型者治疗前后的FEV,和LTE4无明显变化.结论 温州地区汉族人群中基因ALOX5AP(rs10507391)、LTC4S(rs730012)位点的变异与哮喘相关,而另外4个位点的变异与哮喘无关.携带LTC4S(rs730012)变异等位基因C型可影响孟鲁司特的治疗效应.

Abstract：

Objective To investigate the frequencies of leukotriene gene single nucleotide polymorphisms(SNPs)in the asthmatic subiects of Han population in Wenzhou district,and the association between SNPs and response to montelukast treatment. Methods Sequenom matrix-assisted laser desorption/ionization time-of-flight(MALDI-TOF)was used to genotype six polymorphisms in 60 asthmatic patients and 61 controls.According to the SNPs results,11 cases with the LTC4S(rs730012)CC+AC genotype and 11subjects with the AA genotype were given montelukast treatment,and evaluated by the response of pulmonary function and urinary leukotriene E4.Results The frequencies of mutant SNPs in ALOX5(rs2115819,rs4986832,r94987105),LTA4H(rs2660845),ALOX5AP(rsl0507391)and LTC4S (rs730012)were less than 50%.There were no statistical differences of the haplotype distribution (P values were 0.914,0.609.0.609,0.315.0.752 and 0.636 respectively).No statistical difireFences of the mutant allele frequencies were observed in the genes ALOX5(rs2115819,rs4986832,rs4987105)and LTA4H(rs2660845)(OR values were 1.112,0.964,0.964 and 0.673 respectively,all P＞0.05).The invalid value(OR=1.0)was included in the 95%CI of odds ratios.There were no differences of genotype distribution in the above loci(χ2 values were 0.792,2.684,2.683 and 2.524 respectively,all P＞0.05).There was a statistical difierence in the ALOX5 AP(rs10507391)mutant allele between the 2 groups,and the frequency of mutant alllele A in the asthma group was 23.3%(OR=2.016,95%CI=1.027-3.959,P<0.05).There was a statistical difference in the LTC4S(rs730012)mutant allele between the 2 groups, and the frequency of the mutant allele C in the asthma group was 25.0%(OR=1.926.95%CI=1.007-3.685,P＜0.05).Compared with the AA genotype,the LTC4S(rs730012)CC+AC genotype showed a significant improvement of FEV1(t=6.185,P＜0.01)and urinary LTE4 level(t=2.925,P<0.05)after receiving montelukast treatment. Conclusions These results suggest that the SNPs of ALOX5 AP (rs10507391)and LTC4S(rs730012)are associated with asthma in our patients.The LTC4S(rs730012)locus genetic polymorphism contributes to improvement in montelukast response.     

IFNA8基因单核苷酸多态性与我国汉族人群结核分枝杆菌易感性的关联分析

目的 探讨我国汉族人群IFNA8基因单核苷酸多态性（single nucleotide polymorphisms,SNPs）与结核分枝杆菌易感性的关系.方法 收集2010年1月至2011年12月期间深圳市第三人民医院收治的结核病患者资料,采用病例对照研究方法,应用MassARRAY飞行时间质谱生物芯片技术,分成检测结核病组（1533例）和对照组（1445名）IFNA8基因SNPs（rs1330322、rs10964982、rs4978116）的基因型,计算各SNP位点等位基因频率（allele frequency,AF）,应用“四格表”x2检验比较两组人群中候选SNP位点等位基因频率的差别,以P＜0.05为差异有统计学意义,并计算相应的比值比（odds ratio,OR）和95％置信区间（95％CI）.结果 （1）rs1330322位点A等位基因频率在结核病组、对照组中分别为30.5％（936/3066）、27.8％（804/2890）,差异有统计学意义（x2=5.277,OR=1.140,95％CI=1.019～1.275,P=0.022）.rs10964982和rs4978116位点的次要等位基因频率在结核病组中分别为17.0％（520/3066）和28.8％（882/3066）,在对照组中分别为17.0％（491/2890）和28.6％（826/2890）,两组间差异无统计学意义（x2值分别为0.001、0.025,P值分别为0.976、0.874）.（2）根据性别分层发现,结核病组女性患者中,rs1330322位点等位基因A频率为30.8％（330/1072）,对照组等位基因A频率为26.6％（300/1126）,两组间差异有统计学意义（x2=4.605,OR=1.225,95％CI=1.018～1.474,P=0.032）.男性结核病组、对照组患者等位基因A频率分别为30.4％（606/1994）、28.6％（504/1764）,两组间差异无统计学意义（x2=1.489,OR=1.091,95％CI=0.948～1.256,P=0.222）.（3）对女性患者进一步进行年龄分层发现,对于rs1330322位点,≤25岁结核病组、对照组A等位基因频率分别为33.8％（111/328）、25.2％（112/444）,两组间差异有统计学意义（x2=6.818,OR=1.516,95％CI=1.108～2.074,P=0.009）.而＞25岁人群A等位基因在两组人群中差异无统计学意义（x2=0.610,OR=1.096,95％CI=0.871～1.380,P=0.435）.结论 SNP位点rs1330322与结核分枝杆菌易感性密切相关,rs1330322位点基因型在女性、年龄≤25岁组人群具有更高的结核病患病风险预测价值.     

Positive relationship between melatonin receptor type 1B polymorphism and rheumatoid factor in rheumatoid arthritis patients in the Korean population

Melatonin is reported to be an anti-inflammatory agent. No genetic study concerning the association between melatonin and inflammatory disease has yet been reported. Here we performed a polymorphism study on the melatonin receptor type 1B (MTNR1B) in Korean rheumatoid arthritis (RA) patients and controls. The polymorphism of MTNR1B located in 3'-untranslated region (rs 1562444) was selected for its higher rate of heterozygosity among other single nucleotide polymorphisms (SNPs) in both MTNR1A and MTNR1B genes and investigated in RA patients (n = 173) and healthy controls (n = 195) by polymerase chain reaction-restriction fragment length polymorphism assay using NlaIII restriction enzyme. No statistically significant difference in either genotype distribution or allele frequency was observed between RA patients and controls. The genotype distributions and allele frequencies of rheumatoid factor negative [RF(-)] patients were similar to those of controls. However, statistical analysis of genotype revealed a significant association (chi2 = 6.42, P = 0.04) is present between RF(+) and MTNR1B SNP (rs 1562444). Although no statistically significant difference in allele frequency between RF(+) and controls was observed (chi2 = 2.75, P = 0.10), the results might suggest that MTNR1B SNP (rs 1562444) is associated with the presence of RF in RA. This is the first study, to our knowledge, to report a positive genetic relationship between melatonin and RA.     

Genetic polymorphisms predict response to anti-tumor necrosis factor treatment in Crohn's disease

AIM To investigate genetic factors that might help define which Crohn's disease(CD) patients are likely to benefit from anti-tumor necrosis factor(TNF) therapy. METHODS This was a prospective cohort study. Patients wererecruited from a university digestive disease practice database. We included CD patients who received antiTNF therapy,had available medical records(with information on treatment duration and efficacy) and who consented to participation. Patients with allergic reactions were excluded. Patients were grouped as ever-responders or non-responders. Genomic DNA was extracted from peripheral blood,and 7 single nucleotide polymorphisms(SNPs) were assessed. The main outcome measure(following exposure to the drug) was response to therapy. The patient genotypes were assessed as the predictors of outcome. Possible confounders and effect modifiers included age,gender,race,and socioeconomic status disease,as well as disease characteristics(such as Montreal criteria). RESULTS121 patients were included. Twenty-one were nonresponders,and 100 were ever-responders. Fas ligand SNP(rs763110) genotype frequencies,TNF gene-308 SNP(rs1800629) genotype frequencies,and their combination,were significantly different between groups on multivariable analysis controlling for Montreal disease behavior and perianal disease. The odds of a patient with a Fas ligand CC genotype being a non-responder were four-fold higher as compared to a TC or TT genotype(P = 0.009,OR = 4.30,95%CI: 1.45-12.80). The presence of the A(minor) TNF gene-308 allele correlated with three-fold higher odds of being a non-responder(P = 0.049,OR = 2.88,95%CI: 1.01-8.22). Patients with the combination of the Fas ligand CC genotype and the TNF-308 A allele had nearly five-fold higher odds of being a non-responder(P = 0.015,OR = 4.76,95%CI: 1.35-16.77). No difference was seen for the remaining SNPs.CONCLUSION The Fas-ligand SNP and TNF gene-308 SNP are associated with anti-TNF treatment response in CD and may help select patients likely to benefit from therapy.