STK11基因多态性与家族性热性惊厥关联研究

目的研究丝氨酸/苏氨酸蛋白激酶11(serine/threonine kinase 11,STK11)基因单核苷酸多态性(single nucleotide polymorphisms,SNPs)位点与家族性热性惊厥(familial febrile convulsions,FC)的关系.方法用关联分析的方法,结合传递不平衡检验(transmission disequilibrium test,TDT),对来自中国北方的家族性热性惊厥病人和对照组进行分析.结果 SNPs位点的基因型频率在惊厥患儿和对照组中分布均符合Hardy-Weinberg平衡.前期实验位点rs741764的基因型频率和基因频率及rs2075604的基因型频率在两组人群中分布差异有显著性(P＜0.05),后期选择一般人群作为对照组进行的关联分析,除rs741764基因型频率在两组间差异有显著性(P＜0.05)外,其余差异均无显著性.进一步用TDT得到3个位点都没有发现传递不平衡现象.结论 STK11基因的四个SNPs位点均与家族性热性惊厥不相关,STK11基因可能不是中国北方人家族性热性惊厥的易感基因.     

家族性热性惊厥患儿酪蛋白激酶γ2基因单核苷酸多态性研究

目的　研究酪蛋白激酶γ2 (caseinkinaseⅠ gamma 2 ,CSNK1G2 )基因单核苷酸多态性 (singlenucleotidepolymorphisms ,SNPs)位点与家族性热性惊厥的关系。 方法　通过NCBI的dbSNP数据库选择CSNK1G2基因的 5个单核苷酸多态性位点 ,应用聚合酶链式反应 限制性内切酶片段长度多态性技术 ,检测 5 3例家族性热性惊厥患儿和 10 1名健康对照者的CSNK1G2基因 5个SNPs位点的基因型 ,并使用EH1.2 0程序构建单体型并以单体型为标记进行进一步的患儿和正常人相关分析。结果　 5个SNPs位点的基因型频率在惊厥患儿和正常人群中分布均符合Hardy Weinberg平衡。其中 3个位点SNPrs740 42 3、rs2 2 7773 7、rs10 5 9684的基因型频率和基因频率在家族性热性惊厥患儿和对照组分布差异有显著性 (P <0 .0 5 ) ,1个位点rs2 0 74882基因型频率和基因频率在两组人群中分布差异无显著性 (P >0 .0 5 ) ,另一位点rs480 682 5因基因频率较低 ,故未作统计。结论　CSNK1G2基因SNPsrs740 42 3、rs2 2 7773 7、rs10 5 9684可能与家族性热性惊厥相关。     

KHSRP基因多态性与家族性热性惊厥关联研究

目的 研究KH型剪切调控蛋白（KH-type splicing regulatory protein,KHSRP)基因的单核苷酸多态性（single nucleotide polymorphisms,SNPs)与家族性热性惊厥（febrile convulsions,FC)的关系。方法 通过NCBI的dbSNP数据库搜索KHSRP基因的单核苷酸多态性位点，运用位点特异性PCR（site-specificPCR amplification,SSP)和变性高效液相色谱（Dena-turing High Performance Liquid Chromatography,DHPLC)技术对来自中国北方的健康人群和家族性惊厥病人进行SNPs基因分型。结果 KHSRP基因三个多态性住点的基因型在健康人群均符合 Hardy-Weinberg平衡，各等位基因频率和基因型频率在病人和健康人无显著差异。结论 KHSRP基因的3个多态性位点的SNPs均与FC不相关，提示KHSRP基因可能不是FC的易感基因。     

TBX21基因多态性与类风湿关节炎相关性的研究

目的:研究TBX21基因单核苷酸多态性(SNPs)与中国汉族人群类风湿性关节炎(RA)的关系。方法:采用单碱基延伸法(SBE)检测288例RA患者和288名正常健康者TBX21基因的5个SNPs:rs4794067、rs2240017、rs17250932、rs2074190和rs12721470的基因型。结果:5个SNP位点的基因型均符合Hardy-Weinberg平衡(P0.05)。rs12721470位点的基因型频率和等位基因频率在RA组和对照组间的差别具有统计学意义。rs4794067位点的基因型频率在RA组和对照组间无统计学差异,而等位基因频率在RA组和对照组间的差异则具有统计学意义(P0.05)。rs17250932、rs2240017和rs2074190基因型及等位基因频率在RA组和对照组间无统计学意义(P0.05)。结论:TBX21基因单核酸多态性rs12721470与中国汉人群类风湿关节炎是显著相关联的。     

新疆柯尔克孜族过氧化物酶体增殖物激活受体基因单核苷酸多态性

目的:分析柯尔克孜族健康人群过氧化物酶体增殖物激活受体基因(PPARG)的31个单核苷酸多态性(SNP)位点的遗传多态性;方法:利用Hap Map软件筛选31个SNPs位点,利用质谱检测技术进行多态性检测并根据质谱峰图判读样本目标位点基因型,利用χ~2检验确定筛选的SNP位点是否符合Hardy-Weinberg平衡定律并分析柯尔克孜族与其他民族间基因型和等位基因频率差异。结果:在31个SNP位点中,23个位点的最小等位基因频率MAF≥0.05具有多态性;在23个SNPs中rs1175540、rs17036242、rs2881654、rs2959273、rs2972162、rs4135275、rs709151、rs9310401、rs1801282位点在柯尔克孜族和维吾尔族人群间基因型和等位基因分布频率差异均有统计学意义;rs2292101、rs3856806、rs7626560位点在柯尔克孜族和北京汉族人群、犹他州居民、伊巴丹尼日利亚人群间基因型频率差异有统计学意义;rs3856806、rs4135275、rs6782475、rs7626560位点在柯尔克孜族和北京汉族人群、犹他州居民、伊巴丹尼日利亚人群间等位基因频率差异有统计学意义。结论:PPARG基因23个SNP位点多态性在新疆柯尔克孜人群和不同种族问差异具有统计学意义,这种差异可能是导致某些疾病在不同种族间的发现率和临床表现存在显著不同的因素之一。     

BARD1单核苷酸多态性与汉族儿童神经母细胞瘤相关性的研究

目的 探讨BARD1单核苷酸多态性与汉族儿童神经母细胞瘤的相关性.方法 采用病例对照研究,收集242例汉族神经母细胞瘤患儿及301例汉族健康儿童的外周血,通过PCR方法扩增目的DNA,应用Sequenom massarray对所扩增的DNA进行基因分型.以x2检验及logistics分析比较不同组基因型与神经母细胞瘤的关系.结果 BARD1的21个标签SNPs位点均符合Hardy-Weinberg平衡,BARD1的21个SNPs等位基因频率在患者组与对照组之间差异均无统计学意义(P＞0.05).结论 未发现BARD1单核苷酸多态性与汉族儿童神经母细胞瘤有相关性.     

CSPG2和HSPG2基因单核苷酸多态性与中国汉族人颅内动脉瘤的相关性研究

目的 分析CSPG2和HSPG2基因单核苷酸多态性(single nucleotide polymorphism,SNP)与中国汉族散发颅内动脉瘤的相关性.方法 采用病例-对照关联研究方法,收集颅内动脉瘤患者537例以及年龄和性别匹配的正常对照1071名的外周血样各5 mL并提取基因DNA.通过聚合酶链式反应扩增目的DNA,用单碱基延伸(SNaPshot)法进行SNP分型.选取文献报道的CSPG2和HSPG2基因的两个标签SNPs位点rs251124和rs3767137,分析其与汉族散发颅内动脉瘤发病的关联性.结果 CSPG2和HSPG2基因的两个标签SNPs位点rs251124和rs3767137的基因型均满足Hardy-Weinberg平衡.CSPG2rs251124的等位基因频率在患者组与对照组之间差异无统计学意义(P=0.22);HSPG2 rs3767137的等位基因频率在两组之间亦差异无统计学意义(P=0.26),但其相应的OR值大于1(OR=1.12;95％CI=0.92～1.37).患者组与对照组rs251124、rs3767137的基因型频率均差异无统计学意义(P=0.46,0.53).结论 未发现CSPG2和HSPG2基因rs251124、rs3767137 SNPs与中国人颅内动脉瘤发病的相关性.     

DVL2基因多态性与中国汉族人群先天性脊柱侧凸遗传易感性的关联研究

背景：近20年来小鼠的分子胚胎学研究进展获得了大量关于脊椎发育的分子信息,用同线性分析法确立先天性脊柱侧凸的候选基因已成为可能。 目的：通过候选基因DVL2上关键单核苷酸多态性位点的筛查,探索DVL2与中国汉族人群先天性脊柱侧凸及其不同临床表型之间的关联。 方法：采用病例-对照研究,入选127例中国汉族先天性脊柱侧凸患者和127例对照组。根据国际人类基因组单体型图计划提供的基因型数据,应用Haploview 4.1软件选取DVL2的标签和功能单核苷酸多态性。根据椎体畸形特点、畸形部位、畸形受累程度、有无合并肋骨畸形和椎管内畸形将病例组进一步分为不同临床表型。对所有样本应用SNPstream UHT Genotyping系统对所选单核苷酸多态性位点进行基因型鉴定;进一步进行基于基因型/等位基因频率的关联分析,并用Haploview 4.1软件分析对照组单核苷酸多态性位点间是否存在连锁不平衡。 结果与结论：共筛选5个位点：单核苷酸多态性1(rs2074222)、单核苷酸多态性2(rs222837)、单核苷酸多态性3(rs222835)、单核苷酸多态性4(rs10671352)和单核苷酸多态性5(rs222836),其基因型分布在病例和对照组中均符合Hardy-Weinberg平衡;5个位点处于完全连锁不平衡状态;5个位点的基因型/等位基因/单倍体型与先天性脊柱侧凸的发生风险之间不存在相关性。在进一步与先天性脊柱侧凸临床表型的关联分析中没有发现阳性位点。提示在中国汉族人群中DVL2基因可能不是引起先天性脊柱侧凸及其不同临床表型的主要因素,有待于进一步深入研究。     

基质金属蛋白酶9基因多态性与汉族女性青少年特发性脊柱侧凸的关联分析

目的 探讨基质金属蛋白酶9 (matrix metalloproteinase 9,MMP9)基因多态性与汉族女性青少年特发性脊柱侧凸(adolescent idiopathic scoliosis,AIS)发生和发展的关系.方法 以rs17576、rs2250889、rs1805088 3个标签单核苷酸多态性(single nucleotide polymorphisms,SNPs)作为遗传标记,通过TaqMan荧光探针法对190例AIS患者和190名年龄匹配汉族女性正常对照进行等位基因分型.对结果进行Hardy-Weinberg遗传平衡检验、Pearson x2检验、非条件Logistic回归分析、连锁不平衡检验和单倍型分析,并分析基因型与表型的关系.结果 正常对照组rs17576、rs2250889、rs1805088 3个位点基因型分布符合Hardy-Weinberg平衡(P＞0.05);基因型-表型分析发现rs2250889位点基因型为CC的患者的最大Cobb角(48.50°)大于基因型为GG(25.98°)或GC(28.35°)者(P＜0.05),其侧凸程度较严重.结论 目前尚不能认为MMP9基因是汉族女性AIS的易感基因,但rs2250889纯合变异者脊柱侧凸较严重,提示MMP9异常可导致脊柱侧凸的进展.     

ESR1基因单核苷酸多态性及单倍型与精神分裂症的关联研究

目的 探索雌激素受体1 (estrogen receptor 1,ESR1)基因rs2234693、rs9340799和rs3798759位点单核苷酸多念性(single nucleotide polymorphisms,SNPs)及其单倍型与精神分裂症(schizophrenia,SZ)发病之间的相关性.方法 应用聚合酶链反应-限制性片段长度多态性技术对333例SZ患者和315名正常对照rs2234693、rs9340799和rs3798759位点进行基因分型,应用x2检验对SZ组和对照组等位基因、基因型和单倍型频率进行分析.结果 rs2234693、rs9340799位点两组间基因型频率及等位基因分布差异均无统计学意义(P＞0.05).SZ组rs3798759位点GG基因型频率及G等位基因频率均高于健康对照组(P＜0.01).性别分层分析提示,女性SZ患者rs3798759位点TG、GG基因型频率及G等位基因频率均高于健康女性(P＜0.05).单倍型C-A-G和C-G-G在SZ组的分布频率高于对照组(P＜0.05).结论 rs3798759位点突变可能为女性精神分裂症发生的风险因子,C-A-G和C-G-G单倍型可能为精神分裂症的遗传风险单倍型.     

Asthma and atopy are associated with chromosome 17q21 markers in Chinese children

Background:  Single-nucleotide polymorphism (SNP)-based genome-wide association study revealed that markers on chromosome 17q21 were linked to childhood asthma but not atopy in Caucasians, with the strongest signal being detected for the SNP rs7216389 in the ORMDL3 gene. Such association was unknown in Chinese. This study delineated the allele and genotype frequencies of 10 SNPs at chromosome 17q21, and investigated the relationship between these SNPs and asthma and plasma IgE in southern Chinese children.
Methods:  Asthmatic children and non-allergic controls were recruited from pediatric clinics. Their plasma total and aeroallergen-specific IgE concentrations were measured by immunoassay. Ten SNPs on 17q21 region were genotyped by multiplex SNaPshot™, and their genotype associations with asthma traits analyzed using multivariate regression.
Results:  315 patients and 192 controls were enrolled. The allele frequency for C allele of rs7216389 varied significantly from 0.232 in our controls, 0.389 in Han Chinese to 0.536 in Caucasians. Asthma diagnosis was associated with rs11650680 and five other SNPs including rs7216389 ( P  =   0.019–0.034), whereas atopy was associated only with rs11650680 ( P  =   0.0004). Linear regression revealed the covariates for plasma total IgE to be significant for rs11650680 ( P  =   0.008–0.0002). Haplotypic associations were found with atopy and increased plasma total IgE, with the respective odds ratios and 95% confidence intervals for TTTCCGTT haplotype to be 0.21 and 0.09–0.52 ( P  =   0.0002) and 0.41 and 0.18–0.90 ( P  =   0.025).
Conclusion:  Childhood asthma and atopy are associated with chromosome 17q21 in Chinese, but such association may involve genes other than ORMDL3 in this region.     

PCSK9基因rs2479409位点多态性与认知障碍相关

目的探讨前蛋白转化酶枯草溶菌素9(PCSK9)基因rs2479409位点多态性与认知功能障碍的相关性。方法在中国江苏省如皋县开展的以人群为基础的病例对照研究中,共纳入了1 707例年龄70~84岁的研究对象,使用改良长谷川痴呆量表(HDS-R)评价该人群认知功能,并检测了该人群中PCSK9基因rs2479409位点单核苷酸多态性情况。结果该人群PCSK9基因rs2479409多态性主要以GG和AG基因型存在。认知障碍组和对照组在rs2479409位点的等位基因频率、基因型频率分布有差异(P0.05)。A等位基因为认知障碍保护性因素,GG基因型相对于AA基因型1.66倍增加认知障碍发生风险(OR=1.66,95%CI 1.16~2.36,P0.01),调整相关混杂因素后仍有统计学差异(P0.05)。结论 PCSK9基因rs2479409位点多态性与认知障碍相关。     

Association of an IL-4 gene haplotype with Graves disease in children: experimental study and meta-analysis

Investigations of an association between Graves disease (GD) and the IL-4 gene have yielded conflicting results. We performed a case-control study of IL-4 gene polymorphisms possibly associated with GD, as well as a meta-analysis of other such studies. We genotyped IL-4 single nucleotide polymorphisms (SNPs) rs2243250 and rs2243289 in 220 unrelated children with GD and 904 healthy controls. No significant differences between patients and controls were observed in the genotype, allele, or carrier frequencies of the 2 SNPs. The levels of autoantibodies did not differ significantly between the genotypes of each SNP. Linkage disequilibrium between the 2 SNPs was strong in the controls (D', 0.916; r(2), 0.824). Haplotype TA conferred a significant risk of GD (odds ratio = 2.47, 95% confidence interval 1.24-4.95, corrected p value = 0.033). The T allele frequency of rs2243250 was 80.0% in Asians, significantly higher than the 12.6% in Caucasians (p = 1.4 × 10(-269)). Meta-analysis of data from 8 published reports and our own study did not reveal any significant association between these SNPs and GD. Our study showed an association between the IL-4 gene and GD in children, but only using a haplotype-based method, suggesting that this might be a better approach than evaluating individual SNPs.     

Correlation between single nucleotide polymorphisms in a calprotectin subunit gene and risk of periodontitis in a Chinese population

S100A8, the light subunit of calprotectin, has been known to be associated with periodontal inflammation. The present study looked to detect whether three polymorphisms in the upstream region of the S100A8 gene are correlated with periodontitis. Three hundred and twenty one subjects, including chronic periodontitis (CP) patients, aggressive periodontitis (AgP) patients and periodontally healthy controls, were recruited. The SNPs rs3795391, rs3806232 and rs3885688 were analyzed by PCR-RFLP analysis. No person carried the rs3885688 polymorphism in this cohort. For the other two polymorphisms, the combined effects of genotype/allele and gender were shown to be associated with the risk of periodontitis using multivariate logistic regression analysis. The G⁺ genotype/G allele may be considered to exert a significant protective effect in males against AgP (Genotype: rs3795391: P = 0.032, rs3806232: P = 0.017; Allele: rs3795391: P = 0.024, rs3806232: P = 0.013). Although the combined effects of genotype and gender on CP susceptibility were not observed for these two polymorphisms, there does seem to be increased risk of CP in males with allele A compared to females with allele A (rs3795391: P = 0.008; rs3806232: P = 0.009). Hence we found an important association between polymorphisms in the S100A8 gene and periodontitis in a Chinese population.     

EGLN1基因两个位点多态性与藏族人群高原低氧适应的关系

目的 探讨西藏藏族人群EGLN1基因2个SNP(单核苷酸多态性)位点rs479200（C/T）、rs480902（T/C）多态性与高原低氧适应的相关性。
方法 选取世居西藏拉萨藏族150人及辽宁汉族150人的血样,提取白细胞基因组DNA,应用限制性片段长度多态性-聚合酶链反应（PCR-RFLP）技
术检测EGLN1基因2个SNP位点,分析其多态性特征。结果 rs479200位点等位基因C等位基因频率在藏族人和汉族人分别为71.33%和38.17%,
rs480902位点等位基因T等位基因频率在藏族人和汉族人分别为66.67%和36.67%,两组比较差异显著（P<0.01）;rs479200位点TT、TC和CC基因
型频率在藏族人和汉族人分别为6.67%和56.67%、29.33%和33.33%、64%和10%,rs480902位点TT、TC和CC基因型频率在藏族人和汉族人分别为
60.67%和9.33%、30.66%和28.67%、8.67%和62%。两位点TC基因型两组比较差异无统计学意义;TT和CC基因型两组比较差异均显著（P<0.01）。
结论 EGLN1基因rs479200（C/T）和rs480902（T/C）SNP位点多态性与西藏藏族适应高原低氧环境存在相关性。rs479200位点的CC基因型和
rs480902位点的TT基因型可能更有利于适应低氧环境。     

Association of SNP rs17465637 on chromosome 1q41 and rs599839 on 1p13.3 with myocardial infarction in an American caucasian population

Recent genome-wide single nucleotide polymorphism (SNP) association studies (GWAS) have identified a number of SNPs that were significantly associated with coronary artery disease and myocardial infarction (MI). However, many independent replication studies in other populations are needed to unequivocally confirm the GWAS association. To assess GWAS association, we have established a case-control cohort consisting of 1231 well-characterised MI patients and 560 controls without detectable coronary stenosis, all selected from the Cleveland Genebank population. The Genebank cohort has sufficient power to detect the association between MI and four GWAS SNPs, including rs17465637 within the MIA3 gene, rs2943634 (intergenic), rs6922269 in MTHFD1L, and rs599839 near SORT1. SNPs were genotyped by TaqMan assays and follow-up multivariate logistic regression analysis with incorporation of significant covariates showed significant association with MI for MIA3 SNP rs17465637 (P-adj= 0.0034) and SORT1 SNP rs599839 (P-adj= 0.009). The minor allele G of rs599839 was also associated with a decreased LDL-C level of 5-9 mg/dL per allele, but not with HDL-C or triglyceride levels. No association for MI or lipid levels was found for SNPs rs2943634 and rs6922269 (P-adj > 0.05). Our results establish two SNPs, rs17465637 in MIA3 and rs599839 near SORT1 as significant risk factors for MI in the American Genebank Caucasian population.     

CASP9基因在非小细胞肺癌中的表达及其多态性研究

目的探讨caspase9(CASP9)基因在非小细胞肺癌(non-small cell lung cancer,NSCLC)中的表达及其单核苷酸多态(single nucleotide polymorphism,SNP)位点在非小细胞肺癌患者和正常人中的分布情况。方法应用逆转录-PCR方法检测了81例NSCLC患者及对应癌旁正常组织中CASP9的表达情况;应用限制性片段长度多态性技术结合测序法,分析81例NSCLC患者及100名正常人CASP9基因2个SNP位点基因型;应用列联表法统计分析患者组和对照组各SNP位点基因型及等位基因频率。结果44.4%(36/81)的NSCLC组织CASP9基因表达明显下调,与癌旁正常组织相比差异有统计学意义(P<0.05)。位于CASP9基因第1外显子的SNP位点rs1052571的基因型频率和等位基因频率在两组人群中的分布差异无统计学意义;位于CASP9基因第5外显子的SNP位点rs1052576的基因型频率和等位基因频率在两组人群中的分布差异有统计学意义;患者组G等位基因频率明显高于对照组(P<0.05);AG基因型频率在有淋巴结转移的患者中明显高于无淋巴结转移的患者(P<0.05)。结论CASP9基因在NSCLC中低表达,rs1052576多态位点G等位基因和肺癌的发生相关。AG基因型和淋巴结转移有关。