哮喘患者IL-13基因多态性与IL-13、TIgE水平相关性研究

目的:探讨白细胞介素13(IL-13)基因内含子区+1923C/T多态性与哮喘患者外周血单个核细胞(PBMC)产IL-13、血浆总IgE(TIgE)水平及其相关性。方法:用聚合酶链反应和限制性片段长度多态性(PCR/RFLP)方法检测哮喘组与对照组+1923C/T位点多态性。IL-13、血浆总IgE采用ELISA法。结果:+1923位点等位基因C、T频率在两组间分布的差异具有显著性(X2=9.30,P<0.01);等位基因T与哮喘关联,OR(T/C)=1.87,95%CI=1.25-2.80,P<0.01。两组基因型(TT、CT、CC)频率的分布差异亦有显著意义(X2=9.92,P<0.01)。其优势比:OR(TT/CC)=3.76,95%CI=1.52-9.29,P<0.01;OR(CT/CC)=2.10,95%CI=1.11-3.95,P<0.05;OR(TT/CT)=1.79,95%CI=0.77-4.19,P>0.05。哮喘组中TT、TC基因型人群PBMC产IL-13及TIgE水平与同组及对照组CC基因相比较差异均有显著性(P<0.01)。结论:IL-13基因+1923位点多态性是影响哮喘的重要候选基因,T等位基因与哮喘关联。     

白细胞介素-13 基因错义突变rs20541C / T 多态性在广西人群中的分布

目的:分析IL-13 基因rs20541C/ T 位点多态性在广西人群中的分布特点,同时比较其在不同种群之间的分布差异。方法:采用多重单碱基延伸技术(SNaPshot)和DNA 直接测序法对275 例广西人群IL-13 基因rs20541C/ T 进行分型,并分析其基因型及等位基因的分布频率。检测结果与NCBI 中人类基因组国际单体图(HapMap)公布的其他种群(欧洲人、北京人、日本人、非洲人)和文献报道的天津人的基因型及等位基因数据进行比较。结果:IL-13 基因rs20541C/ T 在广西人群中具有多态性,CC、CT 和TT 基因型频率分别为40.0%、46.2%、13.8%,C 和T 等位基因频率分别为63.1%、36.9%。其基因型及等位基因的分布频率在男女性别之间差异无统计学意义(P>0.05),其基因型与欧洲、非洲、天津人群作比较,差异有统计学意义(P<0.05),等位基因分布频率与这5 种人群相比,差异有统计学意义(P<0.05)。结论:IL-13 基因rs20541C/ T 基因多态性在不同种族和地区间存在着不同程度差异。     

IL-13 基因多态性与血清IL-13及嗜酸细胞阳离子蛋白水平的关系

目的　探讨 IL- 13基因多态性与血清 IL- 13及嗜酸细胞阳离子蛋白 (eosinophil cationprotein,ECP)水平的关系及 IL- 13基因多态性在儿童哮喘发病机理中可能的作用。方法　应用限制性内切酶片段长度多态位点法检测 96例哮喘患儿及 5 3名正常对照组儿童 IL - 13内含子 3+192 3位点 C/ T基因多态性 ,并应用 EL ISA法测定血清 IL- 13水平 ,运用荧光酶联免疫法测定血清 ECP水平。结果　哮喘组患儿 IL - 13内含子 3+192 3位点 TT、TC基因型频率分布高于正常对照组 (P<0 .0 5 ) ,且 TT、TC基因型患儿血清 IL- 13、ECP水平较 CC基因型明显升高 (P<0 .0 1)。结论　 IL- 13基因多态性与血清 IL- 13及 ECP水平关系密切 ,提示 IL - 13基因多态性在儿童哮喘发病机理中可能起重要的作用。     

IL-4R、IL-13、ADAM33基因多态性与中国皖南地区汉族人群支气管哮喘的相关性研究

目的:探讨IL-4受体基因Arg551Gln(rs1801275)、IL-13基因Arg130Gln(rs20541)、ADAM33基因T1(rs2280091)位点基因多态性与中国皖南地区汉族人群支气管哮喘的相关性。方法:采用病例-对照的方法,用聚合酶链反应及直接基因测序法比较116例支气管哮喘组与70例正常人对照组之间基因型、等位基因频率的差异。结果:哮喘组和对照组IL-4受体基因Arg551Gln位点和IL-13基因Arg130Gln位点的基因型和等位基因型频率的差异有统计学意义,ADAM33基因T1位点基因型哮喘组和对照组差异有统计学意义,等位基因型频率在哮喘组和对照组差异无统计学意义。结论:提示IL-4R Arg551Gln(rs1801275)位和IL-13基因Arg130Gln(rs20541)位的多态性可能与中国皖南地区汉族哮喘有相关性;ADAM33基因(rs2280091)T1位点位的多态性可能与中国皖南地区汉族哮喘无相关性。     

白介素13基因多态性与湖北汉族人群哮喘的关系

目的：为了探讨IL-13基因编码区精氨酸(Arg)110谷氨酰胺(Gln)多态性是否与湖北地区汉族人群哮喘及血浆总IgE水平升高相关。方法：采用PCR-RFLP方法，检测湖北地区43名哮喘患儿、45名成人哮喘患者、31名非哮喘儿童和46名体检健康成人的IL-13外显子4Arg110Gln的等位基因频率和基因型频率。用化学发光法测定血浆总IgE。结果：IL-13基因4257应等位基因a在儿童、成人中的频率分别为0．39、0．32。IL-13基因Arg110Gln多态性的GlnGln型与儿童哮喘和血浆总IgE升高相关(P分别为0．030、0．0009)，但与成人哮喘、血浆总IgE水平之间无统计学意义(P分别为0．219、0．174)。结论：研究显示IL-13外显子4Arg110Gln g/a单核苷酸多态性与湖北汉族儿童哮喘和血浆总ISE水平相关，但与成人哮喘、血浆总IgE水平之间无统计学意义。     

IL-10、MD-1基因单核苷酸多态性与哮喘易感性的相关性研究

目的:分析IL-10基因 rs1800896、rs3024492位点和髓样分化蛋白1(Myeloid differentiation 1,MD-1)基因rs7740529、rs2233128位点单核苷酸多态性(Single nucleotide polymorphism,SNP)与哮喘遗传易感性的相关性以及过敏性鼻炎(Allergic rhinitis,AR)对哮喘遗传易感性的影响.方法:应用Sequenom MassARRAY○ R SNP分型技术对141例哮喘患者和145例正常对照的四个SNP位点(rs1800896、rs3024492、rs7740529、rs2233128)进行基因分型,再将哮喘患者中确定有过敏性鼻炎和无过敏性鼻炎者分别与正常对照组比较.χ2检验统计分析病例组和对照组的基因型频率;采用非条件Logistic回归校正年龄、性别影响,计算比数比(OR)和95%可信区间(CI),以此评价各位点多态性与哮喘遗传易感性的相关性以及过敏性鼻炎对哮喘易感性的影响.结果:(1)IL-10 rs1800896多态性位点GG、GA、AA三种基因型分布频率在哮喘组、哮喘和过敏性鼻炎共患组、哮喘而无鼻炎组的分布频率和对照组相比,差异均有统计学意义(P＜0.001),有无过敏性鼻炎对其影响不明显.相较GG或AA基因型,携带基因型GA的个体,哮喘的患病风险明显降低(OR=0.033,95%CI:0.017～0.065).(2)MD-1 rs7740529位点CC、CT、TT三种基因型分布频率在哮喘患者组、哮喘和过敏性鼻炎共患组、哮喘而无鼻炎组的分布频率和对照组相比,差异也均有统计学意义(P≤0.005),有无过敏性鼻炎对其影响不明显.相比较CC或TT基因型,携带基因型CT的个体,哮喘的患病风险明显降低(OR=0.369,95%CI:0.225～0.606).(3)IL-10 rs3024492位点TA、AA基因型和MD-1 rs2233128位点AG、GG基因型在哮喘人群中的分布频率与对照组相比无统计学意义(P＞0.05).结论:IL-10 rs1800896与MD-1 rs7740529位点多态性与哮喘的遗传易感性相关,其杂合型的患病风险均明显降低,且有无过敏性鼻炎对其影响不明显.     

IL-10基因启动子多态性与皖南地区汉族人群支气管哮喘的相关性研究

目的:探讨IL-10基因启动子-1082G/A(rs1800896)、-819C/T(rs1800871)、-592C/A(rs1800872)位点多态性与安徽皖南地区汉族人群支气管哮喘的相关性。方法:采用病例-对照方法,用聚合酶链反应及直接基因测序法比较183例支气管哮喘组与151例正常人对照组之间基因型、等位基因频率的差异。结果:哮喘组IL-10基因启动子-1082G/A、-592C/A位点基因型与对照组相比有差异(P<0.05),其等位基因型频率在哮喘组和对照组间亦有差异(P<0.05)。而-819C/T位点基因型及等位基因型频率在哮喘组和对照组间均无差异(P>0.05)。结论:IL-10基因启动子rs1800896(-1082G/A)位点和rs1800872(-592C/A)位点的多态性可能与安徽皖南地区汉族哮喘相关;而rs1800871(-819C/T)位点的多态性可能与安徽皖南地区汉族哮喘无相关。     

白介素13在哮喘发病机制中的作用

Th2淋巴细胞的优势应答及其释放的细胞因子被认为在哮喘的发病过程中起关键性作用。IL-13可不依赖于其它Th2型细胞因子及嗜酸粒细胞、Ig-E介导的途径而单独诱发哮喘的所有症状。IL-13基因多态性与哮喘的易感性也密切相关。其拮抗剂的应用有望成为哮喘病防治的新方法。     

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。     

白介素-28B基因多态性与HCV感染后转归相关性研究

目的研究白细胞介素28B(IL-28B)基因多态性与HCV感染者转归情况的关系,以期对HCV的治疗和防御提供指导。方法采用基因测序的方法分析230例慢性HCV患者的IL-28B的rs8103142基因多态性,并对患者的HCV-RNA载量进行检测。结果 HCV携带者IL-28B的rs8103142位点的TT基因型和T等位基因的比例高于健康人群(P0.05)。HCV携带者rs8103142位点的CC基因型和C等位基因的比例在低HCV RNA水平患者明显较多(P0.05);rs8103142位点TT基因型和T等位基因的比例在高HCV RNA水平患者明显较多(P0.05)。不同HCV基因型患者的基因型和等位基因分布均有明显差异(P0.05)。接受治疗后为SVR患者的rs8103142位点的CC基因型和C等位基因的比例高于非SVR组患者(P0.05)。维吾尔族患者IL-28B的rs8103142位点的TT基因型和T等位基因的比例高于汉族患者(P0.05)。结论 IL-28B的rs12979860基因多态性与HCV感染者治疗后转归有一定联系,TT基因型可使携带者具有HCV的易感性,CC型基因型可增强携带者对HCV抗性,对临床HCV的预防和治疗有重要意义。     

IL-13 Gene Polymorphisms are Associated With Rhinosinusitis and Eosinophilic Inflammation in Aspirin Intolerant Asthma

Purpose

Aspirin-intolerant asthma (AIA) is characterized by moderate to severe asthma that is aggravated by aspirin or other non-steroidal anti-inflammatory drugs. Affected patients frequently have chronic rhinosinusitis and nasal polyposis due to persistent upper and lower airway inflammation with marked eosinophilia. IL-13 plays a crucial role in the development of allergic asthma by inducing airway eosinophilia and hyper-reactivity and it has been correlated with an increased eosinophil count.

Methods

Two promoter polymorphisms of the IL-13 gene (-1510 A>C and -1055C>T) and one coding nonsynonymus Arg110Gln (110G>A) polymorphism were genotyped using primer extension methods in 162 patients with AIA, 301 patients with aspirin-tolerant asthma (ATA), and 430 normal healthy controls (NC).

Results

There was no significant difference in the genotype, allele, and haplotype frequencies of the three polymorphisms among the three groups. AIA patients with the AA genotype -1510A>C (P=0.012) and CC genotype -1055C>T (P<0.001) had a significantly higher frequency of rhinosinusitis, as compared to those with the minor alleles of these two single nucleotide polymorphisms. AIA patients with the GG genotype had a higher peripheral eosinophil count (P=0.025) and a higher serum eotaxin-1 level (P=0.044), as compared to patients with the AA genotype IL-13 Arg110Gln (110G>A).

Conclusions

These findings suggest that the IL-13 polymorphisms at -1510A>C and 1055C>T are associated with the development of rhinosinusitis in AIA patients. IL-13 Arg110Gln may be associated with an increased eosinophil count and eotaxin-1 level and could increase eosinophilic inflammation in the upper and lower airways of patients with AIA.     

Interleukin-17A and -17F single nucleotide polymorphisms associate with susceptibility of asthma in Chinese Han population

Interleukin 17 (IL-17) plays important roles in the progression of asthma. Genetic variants in the Il-17 may influence the immunopathogenesis of many diseases. Many studies have investigated the relevance of IL-17 polymorphism with cancers or immune diseases, including asthma. In this study, single nucleotide polymorphisms (SNPs) of IL-17 were explored by PCR-RFLP and verified by sequencing method. The frequencies of genotypes and alleles were analyzed. Haplotypes were analyzed with the SHEsis online program. The relationship between the genotypes of SNPs and IgE level was also investigated. The False Discovery Rate (FDR) correction was performed (P-adjusted?<?0.05). The frequencies of A allele, GA and (GA?+?AA) genotype of rs3748067 were significantly higher in asthma patients. As for rs763780, the C allele in patients was more frequent than healthy controls. In addition, we found C carriers (CT?+?CC) were significantly higher in asthma patients. We further found that the haplotype CT for IL-17F (rs763780/rs2397084) was associated with an increased susceptibility of asthma, but this association did not survive after FDR correction. The level of serum total IgE in mutant group (GA?+?AA) of rs3748067 was significantly higher than the wild genotype (GG) group and control group. These results suggested that IL-17 SNPs, but not haplotypes may be associated with the susceptibility of asthma in Chinese Han population from central China.     

Haplotypes of the 5' region of the IL-4 gene and SNPs in the intergene sequence between the IL-4 and IL-13 genes are associated with atopic asthma.

IL-4 and IL-13 are important in IgE synthesis and allergic inflammation. Therefore, genes encoding IL-4 and IL-13 are candidates for predisposition to asthma and atopy. A recent study in the YAC transgenic mouse has revealed that one of the conserved noncoding sequences (CNS-1) between IL-4 and IL-13 influences the expression of IL-4, IL-5, and IL-13, suggesting that CNS-1 acts as a coordinate regulator of these genes. This investigation screened for mutations in the 13-kb region between IL-4 and IL-13, which includes the human equivalent of the murine CNS-1. Four single nucleotide polymorphisms (SNPs) were found in the region between IL-4 and IL-13 (IL-4-IL-13SNP1, IL-4-IL-13SNP2, IL-4-IL-13SNP3, and IL-4-IL-13SNP4). There was no mutation in the human CNS-1. We genotyped these and other previously reported polymorphisms in IL-4 and IL-13 using asthmatic families, and examined association by transmission disequilibrium test. Two-locus haplotype analysis revealed that haplotypes composed of the IL-4 RP2del, IL-4 +33T, or IL-4 -589T alleles and either IL-4-IL-13SNP3G or IL-4-IL-13SNP4C are transmitted significantly to asthma-affected children (p = 0.002). This data suggests that haplotypes composed of the 5' region polymorphisms in the IL-4 gene and SNPs in the intergene sequence between IL-4 and IL-13 influence the development of asthma.     

中国广西人群中RTN4基因遗传多态性的研究

目的:研究RTN4基因rs2920891A/C和rs17046647A/G位点多态性在广西人群中的分布特征,比较不同人群的分布差异。方法:本实验采用多重单碱基延伸PCR(SNa Pshot)和DNA测序方法,对323例广西健康体检者RTN4基因的rs2920891A/C和rs17046647A/G位点基因型进行检测,并与国际人类基因组单体型图计划(Hap Map)公布的不同人群(北京、日本、欧洲及非洲人群)RTN4基因多态性数据进行比较。结果:在广西人群中,RTN4基因rs2920891A/C位点存在AA、AC、CC基因型及A、C等位基因,其等位基因频率在男女间的分布差异有统计学意义(P0.05),基因型及等位基因频率与日本、欧洲及非洲人群比较差异均有统计学意义(P0.05);rs17046647A/G位点存在AA、AG、GG基因型和A、G等位基因,基因型及等位基因频率在男女间比较差异无统计学意义(P0.05),而与日本、欧洲及非洲人群比较差异均有统计学意义(P0.01)。结论:中国广西人群中RTN4基因的rs2920891A/C和rs17046647A/G位点多态性与其他种族间存在差异性。     

Association of single nucleotide polymorphisms in interleukin 12 (IL-12A and -B) with asthma in a Chinese population

Increasing evidence has indicated that genetic variants may contribute to immune dysregulation and susceptibility to noninfectious inflammatory diseases. Cytokines, including interleukin 12 (IL-12), play a key role in the regulation of the immune system. The aim of this study was to investigate whether single nucleotide polymorphisms (SNP) in IL-12A and IL-12B were associated with asthma in a Chinese population. Genotype characteristics were determined in 197 asthma patients and 369 controls by the polymerase chain reaction-restriction fragment length polymorphism method and DNA sequencing assay. The genotype and allele frequencies of IL-12A rs568408 demonstrated significant differences between cases and controls (p < 0.001). The AC genotype of rs3212227 was associated with a significantly decreased risk of asthma compared with the AA genotype (p = 0.036). The subjects carrying combined genotypes (rs568408 AG and rs3212227 AC/CC) at both loci had a 2.05-fold increased asthma risk compared with those carrying all other genotypes (p = 0.001). In contrast, individuals carrying combined genotypes of rs568408 GG and rs3212227 AC/CC were associated with a significantly decreased risk of asthma compared with those carrying the combined genotypes of rs568408GG and rs3212227AA (p = 0.009). No significant difference was reported for rs2243115 between cases and controls. These results suggest that the SNPs in IL-12A rs568404 and IL-12B rs3212227 may individually and jointly contribute to the risk of asthma in a Chinese population.     

广西人群IL-22基因多态性分布特征及其与血脂的关系

目的:研究广西正常人群中白细胞介素22(IL-22)基因rs2227485C/T和rs2227491A/G位点的多态性分布特点和在不同人群间的分布差异,探讨不同基因型间常见血脂指标水平的差异。方法:采取多重单碱基延伸法(SNa Pshot)和DNA测序相结合的方法对280例广西人群IL-22基因的rs2227485C/T和rs2227491A/G位点进行基因分型检测,并用统计学方法比较各组间多态性分布的差异及不同基因型间血脂指标水平的差异。结果:rs2227485C/T存在CC、CT和TT 3种基因型,分布频率分别为17.1%、49.3%和33.6%,此位点基因型及等位基因频率在广西人群不同性别间的差异无统计学显著性(P0.05),其基因型及等位基因与国际人类基因组单体型图计划公布的意大利、北京、日本和墨西哥人群相比,差异有统计学意义(P0.05);rs2227491A/G存在AA、AG和GG 3种基因型,分布频率分别为16.1%、52.8%和31.1%,此位点基因型及等位基因频率在广西人群不同性别间的差异无统计学显著性(P0.05),基因型频率与意大利、日本和墨西哥人群之间的差异有统计学意义(P0.05),等位基因分布频率与其他4个人群相比差异均有统计学意义(P0.05)。rs2227491A/G位点3种基因型间的HDL-C和LDL-C差异有统计学意义(P0.05),其中HDL-C在AG/AA与GG组比较差异有统计学意义(P0.05),LDL-C在AG/GG和AA组比较差异有统计学意义(P0.05)。结论:IL-22基因rs2227485C/T和rs2227491A/G位点多态性在不同人群间存在着差异。rs2227491A/G多态性与血脂水平相关。     

IL-10 基因多态性与溃疡性结肠炎易感性的关系及对临床预后的影响

目的:探讨IL-10 多态位点的基因多态性与溃疡性结肠炎的易感性及对临床预后的影响。方法:采用病例对照研究设计,选取80例溃疡性结肠炎患者作为病例组,另外选性别和年龄匹配的健康受试者作为对照组。所有患者治疗前抽取空腹静脉血并提取DNA,设计819 T/ C(rs1800871)、592A/C(rs1800872)、 -1082 G/ A(rs1800896)PCR 引物进行PCR 扩增,扩增产物酶切后进行琼脂糖凝胶电泳以确定基因类型,采用Logistic 回归计算校正相对危险度(OR)和95% 置信区间(95%CI)评价基因多态性与溃疡性结肠炎的易感性,并分析对临床预后的影响。结果:(1) 病例组患者IL鄄10 多态位点rs1800896 基因类型AA、GG 和AG 分布频率与对照组受试者差异具有统计学意义(P<0.01);(2)与rs1800896 基因型AA 比较,基因型为GG 的患者溃疡性结肠炎危险性显著升高(P<0.01),并且临床缓解率显著降低(P<0.01);(3)病例组患者IL-10多态位点rs1800871 基因类型CC、CT 和TT 分布频率与对照组受试者差异无统计学意义(P>0.05);(4)病例组患者IL鄄10 多态位点rs1800872 基因类型AA、AC 和CC 分布频率与对照组受试者差异无统计学意义(P>0.05)。结论:IL-10 多态位点rs1800896 基因类型GG 可增加溃疡性结肠炎的易感性,并且显著降低患者的临床预后。     

Association between gene polymorphisms of IL-12, IL-12 receptor and IL-27 and organ involvement in Iranian endometriosis patients

Endometriosis is an inflammatory disease characterized by the presence of ectopic endometrial tissue, immune cell dysfunction and abnormal cytokine secretion. In addition to immunological factors, genetic variations that influence endometriosis severity and cytokine expression levels play important roles in the pathogenesis of this disease. Interleukin-12 (IL-12), specifically its p40 subunit encoded by IL-12B gene and the interleukin-12 receptor β1 (IL-12Rβ2) chain of its receptor, as well as interleukin-27 (IL-27) are important in the establishment of endometriosis. So, in this study, we measured IL-12 and IL-27 serum levels and investigated the possible links between IL-12B rs3212227, IL-12Rβ2 rs3790565 and IL-27 rs153109 polymorphisms and the risk of developing endometriosis in a group of Iranian women. In this case-control study, 162 endometriosis patients and 151 healthy women were included and tested for the aforementioned polymorphisms using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique. The enzyme-linked immunosorbent assay (ELISA) method was also used to measure IL-12 and IL-27 serum levels. Although there was no statistically significant association between the genotypes and alleles of the studied polymorphisms and the development of endometriosis in general, the AA genotype of IL-12B rs3212227 showed a significant association with uterine endometriosis when compared to AC+CC genotypes (p = .04, CI = 0.270–0.988, OR = 0.517). Indeed, the AA genotype of the IL-12B rs3212227 single nucleotide polymorphism (SNP) may be linked with a lower risk of developing uterine endometriosis. There was no significant difference in IL-27 levels between the two studied groups (p = .49), and IL-12 levels were undetectable in both groups. In conclusion, the AA genotype of IL-12B rs3212227 might be associated with a decreased risk of uterine involvement in endometriosis patients.