钙腔蛋白rs339097基因多态性与华法林稳定剂量的关系

目的:探讨钙腔蛋白(CALU)rs339097基因型在中国汉族人群中的分布情况及其基因多态性与瓣膜置换术后华法林稳定剂量的关系。方法:采用Snapshot技术检测226例研究对象CALU rs339097位点基因型,计算其基因型及等位基因频率。对其中176例瓣膜置换术患者,分析CALU rs339097基因多态性与华法林稳定剂量的相关性。结果:226例研究对象中,基因型TT、CT、CC分别为221例(97.8%)、4例(1.8%)和1例(0.4%),T和C等位基因分别为446次(98.7%)和6次(1.3%)。176例瓣膜置换术患者中,CC基因型未检出,TT基因型检出172例,CT基因型检出4例;在达到稳定抗凝状态时,TT基因型和CT基因型华法林日维持剂量[(3.19±0.86)mg/d∶(4.50±0.61)mg/d]差异有统计学意义(P=0.003)。结论:中国汉族人群CALUrs339097基因多态性是瓣膜置换术后华法林个体剂量差异的影响因素。     

IL-17基因多态性与中国汉族人群炎症性肠病的关系

目的:研究IL-17A和IL-17F的5个多态性位点与中国汉族人炎症性肠病之间的关系.方法:采用病例-对照研究方法,收集确诊的溃疡性结肠炎(ulcerative colitis,UC)和克罗恩病(Crohn’s disease,CD)患者共350例(UC270例;CD80例),健康对照组268例,收集外周血标本2mL,提取DNA,运用LDR(ligasedetection reaction allelic)技术进行多态性检测.采用SPSS17.0软件进行数据分析.结果:CD患者中IL-17F(rs763780,7488T/C)突变等位基因C的频率明显高于对照组(13.8%vs8.4%,P=0.044,OR=1.74,95%CI1.01-2.99).在亚型分析中,rs763780基因多态性与CD病变范围有关,突变等位基因C在CD回结肠型患者中的频率明显高于对照组(P=0.02).IL-17A(rs2275913,G-197A)与UC患者疾病的严重程度有弱相关性,含有突变基因A的患者倾向于临床轻型.IL-17F(rs763780,7488T/C)多态性与U C患者发病年龄之间有弱相关性,T/C基因型患者趋向于年轻型(P=0.046).结论:IL-17F rs763780基因多态性与CD易感性之间有弱相关性,在亚组分析中发现rs763780与CD的病变范围和UC的发病年龄有关.IL-17A rs2275913基因多态性与UC疾病严重程度呈负相关.     

IL-17A基因和IL-17F基因多态性在评估扩张型心肌病发病风险和预后的意义

目的:评估白细胞介素17A(IL-17A)和IL-17F单核苷酸多态性(SNPs)与中国重庆地区汉族人群扩张型心肌病(DCM)发生风险和预后的关系。方法:选取112例DCM患者和125例年龄和性别相匹配的健康人群对照,采用聚和酶链反应-限制性内切酶片断长度多态性和DNA测序的方法对IL-17A基因rs2275913(G-197A)和IL-17F基因rs763780(7488C/T)两个功能性SNP进行基因分型,然后运用等统计学方法分析SNPs与DCM遗传易感性及预后的关系。结果:IL-17A基因SNP rs2275913(G-197A)携带_(AA)基因型的个体患DMC的风险是携带GG基因型个体的2.124倍(95%CI_(AA)=1.213-3.964,P_(AA)=0.007);在DCM患者中,rs2 275 913位点_(AA)基因型携带者在NYHA心功能分级Ⅳ级、左心室射血分数<35%及有病毒性心肌炎病史的患者中所占比例显著增高(P<0.05);未发现IL-17F基因SNP rs763780(7488C/T)与DCM的发病和预后相关。结论:本研究首次发现IL-17A基因rs2275913(G-197A)位点SNP可能与DCM的遗传易感性和预后相关。     

白细胞介素17基因多态性及血浆水平与慢性丙型肝炎病毒感染的关系

目的 探讨白细胞介素17 (IL-17)单核苷酸多态性(SNPs)及血浆水平与慢性HCV感染的关系.方法 选择慢性丙型肝炎(CHC)患者228例,健康体检者81例.TaqMan探针法检测IL-17 rs8193036及rs2275913位点基因多态性,酶联免疫吸附法检测血浆IL-17水平,分析CHC患者IL-17等位基因、基因型及血浆水平与健康人群的差异.结果 CHC患者组与健康对照组IL-17 rs8193036位点C、T等位基因及rs2275913位点A、G等位基因分布比较,P值均＞0.05,差异均无统计学意义.CHC患者组与健康对照组的IL-17 rs8193036位点基因型CC (46.49％对比41.98％)、CT (45.61％对比44.44％)、TT(7.89％对比13.58％)分布比较,P值均＞0.05,差异均无统计学意义;rs2275913位点基因型AA(16.23％对比13.58％)、AG (48.25％对比50.62％)、GG(35.53％对比35.80％)分布比较,P值均＞0.05,差异均无统计学意义.HCV基因1型与2型感染CHC患者IL-17 rs8193036及rs2275913位点等位基因及基因型分布比较,P值均＞0.05,差异均无统计学意义.CHC患者组血浆IL-17水平为(97.67±39.68) pg/ml显著高于健康对照组的(71.60±19.78)pg/ml,两组比较t=2.414,P=0.033,差异有统计学意义.结论 IL-17高水平表达在HCV感染及慢性化中发挥重要作用,而IL-17 rs8193036及rs2275913位点SNPs可能与HCV易感性及持续感染无明确关系.     

IL-17A基因多态性及血浆水平与病毒性心肌炎的相关性研究

目的:探讨白细胞介素17A(interleukin-17A,IL-17A)rs2275913(G-197A)位点单核苷酸多态性(single nucleotide polymorphisms,SNPs)及血浆水平与重庆汉族人群病毒性心肌炎(viral myocarditis,VMC)的关系。方法:收集VMC患者200例,根据病程将患者分为急性期组112例和恢复期组88例,并选择同期200例健康体检的正常人作为对照组,采用聚和酶链反应-限制性内切酶片断长度多态性(PCR-RFLP)、DNA测序等方法检测全部受试者IL-17A基因rs2275913(G-197A)位点SNP,采用酶联免疫吸附法(ELISA)测定两组血清IL-17水平。结果:VMC组IL-17A基因rs2275913(G-197A)多态位点AA基因型和A等位基因频率均显著高于对照组(P0.05),携带AA基因型及携带A等位基因(AA+AG基因型)可增加患VMC的易感性(矫正后ORAA=2.197,95%CIAA=1.208-4.279,PAA=0.003;矫正后ORAA+AG=2.051,95%CIAA+AG=1.134-3.995,PAA+AG=0.009)。VMC组血清IL-17水平明显高于对照组(P0.05),尤以急性期为著(P0.05)。不论是VMC组还是对照组,IL-17A基因rs2275913(G-197A)多态位点中含A等位基因(AA+AG)者血清IL-17水平均显著高于非A等位基因(GG)携带者(P0.01)。结论:IL-17A基因rs2275913位点SNP可能与中国重庆地区汉族人群VMC有关,A等位基因是VMC的易感基因。     

CYP4F2基因多态性影响华法林初始治疗效果的临床研究

目的研究心脏瓣膜置换术后口服华法林抗凝治疗的初始剂量的个体化区别,分析CYP4F2 rs2108622基因型对口服华法林初始剂量的影响。方法入选广东省心血管病研究所2000年至2008年瓣膜置换术后口服华法林抗凝治疗的患者,回顾患者一般资料、临床资料、用药剂量、国际标准化比值(international normalizedratio,INR)和进入治疗窗时间(INR≥1.8)、超出治疗窗时间(INR3.5)。结果本次研究共有769例患者资料齐全,民族均为中国汉族,其中CYP4F2基因型为CC型的患者占65.8%(n=506),CT型28.7%(n=221),TT型5.5%(n=42)。按基因型不同分别分析进入治疗窗(INR1.8)和过度抗凝(INR3.5)的时间发现,不同基因型之间比较,差异有统计学意义(P0.05)。结论 CYP4F2基因型多态性对于口服华法林初始剂量存在一定的影响。     

心脏机械瓣膜置换术后病人早期华法林抗凝治疗的依从性、并发症及其影响因素研究

目的探讨心脏机械瓣膜置换术后病人早期华法林抗凝治疗的依从性、并发症及其影响因素。方法选取2014年5月—2017年2月陕西省核工业二一五医院188例接受心脏机械瓣膜置换术治疗病人,按随机数字表法分为研究组和对照组,各94例。研究组术后早期给予华法林进行抗凝治疗,对照组采用低分子肝素治疗。统计对比两组并发症(出血、血栓或栓塞)发生情况及研究组一般情况(性别、年龄、文化程度、居住地、饮酒状况、抽烟状况、病程、并发疾病、抗凝知识认知程度、社会支持及治疗依从性),分析术后早期华法林抗凝治疗并发症发生的影响因素。结果研究组并发症发生率为37.23%,对照组39.36%,两组比较差异无统计学意义(P0.05);单因素分析得知,社会支持、治疗依从性、抗凝知识认知程度、文化程度、居住地、并发疾病、病程、性别均与早期应用华法林抗凝治疗并发症发生并存在明显相关性(P 0.05),而饮酒状况、吸烟状况与早期应用华法林抗凝治疗并发症发生率无明显相关性(P0.05);Logistic回归分析显示,社会支持、抗凝知识认知程度均是早期应用华法林抗凝治疗发生并发症的重要危险因素(P 0.05)。结论心脏机械瓣膜置换术后病人早期华法林抗凝治疗依从性不佳,出血、血栓等并发症发生率较高,且社会支持、抗凝知识认知程度均是早期应用华法林抗凝治疗并发症发生的危险因素,临床可据此制定有针对性干预方案,减少或防止并发症发生。     

细胞色素P450亚型基因多态性分析及对华法林用药剂量的影响

目的探讨细胞色素P450亚型(CYP2C9)基因多态性与华法林抗凝治疗维持剂量的相关性。方法选择服用华法林的汉族患者200例,男性和女性各100例。患者均为心脏瓣膜置换术后。通过CAPS技术及常规DNA测序方法对CYP2C9基因的3个候选位点(CYP2C9*2、CYP2C9*3、CYP2C9*c65)进行测定。并分析携带不同基因患者华法林应用剂量差异。结果 200例患者中,并未检测到CYP2C9*2位点发生突变,仅检测到1种等位基因C,基因型全部为C/C野生型。检测到CYP2C9*3A和C位点,其中A/A野生型为171例,占85.5%;A/C杂合子突变型为18例,占9.0%;C/C纯合子突变型为11例,占5.5%。等位基因A频率为94.3%,等位基因C频率为5.7%。CYP2C9*3基因突变与服用华法林剂量存在显著差异(P0.05),A/C型患者服药剂量较A/A型患者降低了18.5%,C/C型患者服药剂量较A/A型降低了76.0%。CYP2C9*c65位点检测出G和C位点2种等位基因,G/G野生型182例,占91.0%;G/C杂合子突变型为18例,占9.0%;这2种基因突变患者的华法林维持剂量之间不存在明显相关性。结论 CYP2C9基因多态性与华法林抗凝治疗维持剂量有一定相关性。     

胰岛素降解酶基因单核苷酸多态性与迟发性阿尔茨海默病关系的研究

目的探讨胰岛素降解酶(IDE)基因中与新疆地区迟发性阿尔茨海默病(LOAD)发病相关的可能危险位点。方法选择新疆地区汉族人群168例LOAD患者为LOAD组和170例健康者为对照组,采用直接基因测序的方法比较2组IDE 3个基因位点rs1544210、rs1887922和rs1999764基因型和等位基因频率分布,并对其与LOAD的关系进行相关分析。结果 LOAD组与对照组rs1887922和rs1999764基因型和等位基因频率差异有统计学意义(P<0.05)。LOAD组rs1999764TT基因型和T等位基因明显高于对照组,rs1887922TT基因型和T等位基因明显低于对照组。2组不携带载脂蛋白Eε4等位基因的亚组中,rs1887922和rs1999764各基因型和等位基因频率比较,差异有统计学意义(P<0.01)。rs1544210和rs1999764之间具有显著的连锁不平衡,构成了相对降低LOAD发病风险的单体型rs1544210 G/rs1999764C和未携带载脂蛋白Eε4等位基因时相对危险的单体型rs1544210G/rs1999764T。结论 IDE基因单核苷酸多态性基因位点rs1887922和rs1999764可能与新疆地区汉族人群LOAD发病相关。     

CD40基因单核苷酸多态性及单倍型与缺血性脑卒中的相关性研究

目的研究CD40基因单核苷酸多态性及其单倍型与缺血性脑卒中易感性之间的关系;同时分析CD40基因型及血清水平与缺血性脑卒中的相关性。方法选择缺血性脑卒中患者202例(脑卒中组),健康体检者199例(对照组),应用单碱基延伸的PCR技术和DNA测序法对CD40基因rs1883832C/T、rs1569723A/C和rs4810485G/T单核苷酸多态性进行基因分型,同时采用ELISA法检测血清CD40水平。结果脑卒中组与对照组CD40基因rs1883832C/T位点基因型和等位基因频率比较,差异有统计学意义(P<0.01)。等位基因频率的相对风险分析发现,rs1883832T等位基因携带者患缺血性脑卒中的风险是C等位基因的1.557倍(P=0.002);携带rs1883832T等位基因的缺血性脑卒中患者血清CD40水平显著高于不携带者(P<0.05)。联合基因型分析发现,脑卒中组T-C-T单倍型携带者较对照组明显增加了发病风险(P=0.033)。结论 CD40基因rs1883832C/T多态性和T-C-T单倍型与缺血性脑卒中的发病具有相关性,其中T等位基因可能是缺血性脑卒中的遗传易感基因,携带T等位基因的个体可能通过促进CD40的高度表达进而增加了缺血性脑卒中的发病风险。     

Association of IL-17 polymorphisms with gastric cancer risk in Asian populations

AIM: To investigate associations between the IL-17 rs2275913 GA and rs763780 TC polymorphisms and susceptibility to gastric cancer in Asian populations. METHODS: We reviewed studies published up to 2014 on IL-17 polymorphisms with gastric cancer susceptibility systematically. Relevant articles were identified in the MEDLINE, Science Citation Index, Cochrane Library, Pub Med, EMBASE, CINAHL and Current Contents Index databases. We used version 12.0 STATA statistical software to evaluate the statistical data. Two reviewers abstracted the data independently. Odds ratios(ORs) and 95% confidence intervals(95%CIs) were calculated. RESULTS: Seven independent, case-control studies were chosen for the meta-analysis, which included 3210 gastric cancer patients and 3889 healthy controls. The overall estimation showed a positive association between the IL-17 rs2275913 GA polymorphism and the occurrence of gastric cancer for five genetic models(all P 0.05) and similar results were observed for the IL-17 rs763780 TC variation with four genetic models(all P 0.05), but not for the dominant model(P 0.05). Subgroup analysis by country revealed that the rs2275913 GA and rs763780 TC polymorphisms may be the main risk factor for gastric cancer in Chinese and Japanese populations. CONCLUSION: The IL-17 gene may be significantly correlated with gastric cancer risk in Asian populations, especially those carrying the rs2275913 GA and rs763780 TC polymorphisms.     

IL-17 Genetic Variations Increase the Risk of Cirrhotic/Hepatocellular Carcinoma in Patients with Hepatitis B Virus Infection.

Background: Genetic variation in immune regulatory genes might influence the HBV infection outcome. Objective: This study aimed to determinethe association of IL-17A rs2275913 (G197A), IL-17F rs763780 (A7488G), and IL-23R rs10889677 (C2370A) gene polymorphisms, as well as the emerged haplotypes in the individual infected by HBV and to investigate their association with the infection outcome. Materials and Methods: 300 chronic HBV infections with Cirrhotic/Hepatocellular carcinoma (C/HCC), chronic active (CA), and asymptomatic carrier (AC) and 38 individuals whose infection was spontaneously cleared (SC) were enrolled. Genomic DNA was extracted, and IL-17A/F and IL-23R genotyping were performed by using the PCR-RFLP method. Results: Out of 338 subjects, 238 and 100 were respectively male and /female with a mean age of 47.61±13.41. The frequency of GA genotype (p=0.01) and A alleles (p=0.001) of IL-17A rs2275913 (G197A), as well as the frequency of AA genotype (p=0.014) and A alleles (p=0.018) of IL-17F rs763780 (A7488G) gene locus, was found to be significantly higher in the C/HCC than CA and AC groups. Furthermore, the frequency of GA and AG haplotype in CA individuals was higher than those with C/HCC and AC (p=0.003). Also, the GG haplotype was higher in AC individuals than those with C/HCC (P=0.022), and the AA haplotype was higher in C/HCC individuals than the CA patients (P=0.001). Conclusion: Our findings suggest that A allele and GA genotype at IL-17A rs2275913 (G197A), as well as A allele and AA genotype at IL-17F rs763780 (A7488G) locus, might be associated with increased risk of C/HCC among patients with hepatitis B virus infection.     

Association between <Emphasis Type="Italic">IL17A</Emphasis> and <Emphasis Type="Italic">IL17F</Emphasis> polymorphisms and risk of Henoch–Schonlein purpura in Chinese children

Previous studies suggested that interleukin-17 and Th17 cell play an important role in the pathogenesis of childhood Henoch–Schonlein purpura (HSP). The purpose of our study is to elucidate whether the IL17A and IL17F gene polymorphisms are susceptibility genes for the development of HSP in Chinese children. A total of 148 HSP patients and 202 controls were enrolled for analyzing the single nucleotide polymorphisms (SNP) of IL17A (rs2275913, rs8193037 and rs3819025) and IL17F (rs763780 and rs9463772). TaqMan Real-Time polymerase chain reaction method was used in SNP genotyping. Compared to the healthy controls, the IL17A rs2275913 variant allele A showed a significant association with HSP [odds ratio (OR) 0.70; 95 % CI 0.51–0.94, P = 0.018]. Genotyping analysis demonstrated rs2275913 was associated with a decreased HSP risk (G/A vs. G/G: OR 0.56; 95 % CI 0.33–0.95; A/A vs. G/G: OR 0.46; 95 % CI 0.24–0.86; P = 0.032). Also, our findings showed that the A allele of IL17A rs3819025 was associated with a higher risk of HSP nephritis (OR 1.61; 95 % CI 1.00–2.58; P = 0.047). In addition, a risk haplotype of IL17A (GGA) was found (OR 1.84; 95 % CI 1.17–2.88; P = 0.008). However, no significant differences between HSP patients and healthy controls were observed when comparing genotype, allele or haplotype frequencies of the IL17F rs763780 and rs9463772 polymorphisms. In this study, we confirmed that the rs2275913 polymorphism of the IL17A gene was associated with susceptibility to HSP in Chinese children. However, there was no relationship between IL17F rs763780 and rs9463772 polymorphisms and HSP susceptibility.     

慢性丙型肝炎患者病毒基因型与IL-28B基因型分布

目的：了解慢性丙型肝炎患者白细胞介素-28B（IL-28B）基因型多态性分布的特点及其临床意义。方法在27例慢性丙型肝炎患者,分离外周血细胞DNA,采用IPLEX Gold法检测宿主IL-28B基因多态性;分析患者IL-28B基因型与血清丙型肝炎病毒（HCV）基因型、HCV RNA载量和肝功能指标的相关性。结果在27例慢性丙型肝炎患者中,感染HCV基因1型1例（3.7%）,1b基因型7例（25.9%）,其它基因型19例（19/27,70.4%）;在IL-28B基因型中,rs12979860 CC基因型、rs12980275 AA基因型及rs8099917 TT基因型共24例（88.9%）,而IL28B rs12979860 CT基因型、rs12980275 GA基因型和rs8099917 GT基因型共3例（11.1%）;在HCV基因1型或1b型感染者中,IL28B rs12979860 CC基因型、rs12980275 AA基因型和rs8099917 TT基因型占62.5%（5/8）,而HCV其他基因型感染者IL28B rs12979860 CC基因型、rs12980275 AA基因型和rs8099917 TT基因型占100%（19/19）;HCV基因1型或1b型感染者与HCV其他基因型感染者比,其IL28B rs12979860位点、rs12980275位点和rs8099917位点基因型分布有显著性差异（P＆lt;0.01）;IL-28B基因多态性分布与患者血清HCV RNA载量或肝功能指标的变化无显著性相关。结论本组慢性丙型肝炎患者HCV基因型大多为非1型;大多数感染者IL-28B基因为rs12979860 CC、rs12980275 AA和rs8099917 TT基因型。     

中国汉族人群CYP3A4基因变异对华法林初始抗凝治疗反应性的影响

目的探讨细胞色素P450酶3A4基因(cytochrome P-450 3A4,CYP3A4)多态性对中国汉族人华法林初始抗凝治疗反应性的影响。方法入选2000年至2008年在广东省人民医院行瓣膜置换术后长期口服华法林抗凝治疗的中国汉族患者798例。通过文献检索,选取与华法林药动学可能相关的CYP3A4的2个SNPs多态性位点(rs2242480、rs2246709),采用SNaPshot进行基因单核苷酸多态性(SNP)的检测,并按基因型分组,分别比较CYP3A4不同基因型间华法林日平均剂量、凝血酶原时间国际标准化比值(prothrombin time-internationalnormalized ratio,PT-INR)达标时间和过度抗凝发生率的差异。群体代表性检验采用Hardy-Weinberg遗传平衡检验。结果在华法林初始治疗的20 d内,华法林日剂量在男性明显高于女性,差异有统计学意义[(2.92±1.18)mg/dvs.(2.64±0.98)mg/d,P0.05],而PT-INR达到目标值(1.8)平均需要时间和初始治疗阶段过度抗凝的比率在男女之间比较,差异无统计学意义(P0.05)。CYP3A4不同基因型之间华法林日剂量、达标时间和过度抗凝比率比较,差异均无统计学意义(P0.05)。结论 CYP3A4基因变异对中国汉族人群初始治疗20 d内的华法林日剂量无明显影响,常规剂量给药方案在服药初期CYP3A4突变个体出血风险无明显增加。     

Interleukin-17 A and F gene polymorphisms affect the risk of tuberculosis: An updated meta-analysis

Background

Cytokines are fundamental elements in mediating and stimulating the immune response against tuberculosis (TB). Growing evidence indicated that polymorphisms in the interleukin-17 (IL-17) A and F genes are implicated in TB.

Cytokine Gene Polymorphisms in Chinese Children with Idiopathic Nephrotic Syndrome

Background: Cytokines play a role in the progression of idiopathic-nephrotic syndrome (INS). Objectives: To investigate the association of different cytokine genes polymorphisms with INS incidence and response to steroid therapy in Chinese children. Methods: 182 children with INS and 100 healthy controls were enrolled in this study. Blood genomic DNAs were used to analyze20 single nucleotide polymorphisms (SNPs) in 8 cytokine genes includingIL-21, IL-18, IL-6, IFN-γ, IL-4, IL-10, IL-17F, IL-17A d by multi-PCR with next-generation sequencing. Results: Among 182 children with INS, 89 (48.6%) were steroid-sensitive (SS), 73 (39.9%) were steroid-dependent (SD) and 21 (11.5%) were steroid-resistant (SR). In 20 SNPs, IL-4-rs2243283 exhibited a significantly different genotype distribution between INS and the healthy controls (CC is a risk genotype: 66.5% of INS VS 51% of the control; OR=1.91, p=0.012). Patients carrying AG genotype (rs2275913, IL-17A) had a significantly higher risk of steroid-dependent response (69.1% of SD VS 46.4% of SS; OR=2.58, p=0.014). Similarly, patients carrying A allele of IL-10-rs1800872 (39.0% of SD VS 26.7% of SS; OR=1.76, p=0.018) and C allele of IL-10-rs1800896 (12.3% of SD VS 3.9% of SS; OR=3.44, p=0.004) had a higher risk of steroid-dependent response. However, none of these 20 SNPs showed a significant difference between SS group and SR group. Conclusion: Among the 20 cytokine gene SNPs, IL-4-rs2243283 might increase the susceptibility to INS in Chinese children; rs2275913 of IL-17A, rs1180972, and rs1800896 of IL-10 show association with the steroid -response in Chinese INS children.     

IL-17A gene polymorphism rs2275913 is associated with the development of asthma after bronchiolitis in infancy

Background

Interleukin-17 (IL-17A) is a mainly pro-inflammatory cytokine, and IL-17 signaling implicates in the development of allergic asthma. The polymorphism rs2275913 in the promoter region of the IL-17A gene has in previous studies been associated with asthma susceptibility. The objective was to evaluate the association between IL-17A rs2275913 (-197G>A) polymorphism and post-bronchiolitis asthma and/or allergic rhinitis in a prospective 11–13 years post-bronchiolitis follow-up.

IL-17A and IL-17F genes variants and susceptibility to childhood asthma in Tunisia

Objectives: IL-17A and IL-17F are new pro-inflammatory cytokines implicated in neutrophilic inflammation and thus, involved in the pathogenesis of asthma. We investigated the possible association among asthma and IL-17A -197G/A (rs2275913), IL-17F 7488A/G (rs763780) and IL-17F 7383A/G (rs2397084).

Methods: The study was performed in 171 patients with asthma (mean age 9.5?years, 105 boys, and 66 girls) and 171 healthy individuals matched with patients in age and sex. The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method was used to detect genes’ polymorphisms.

Results: IL-17A -197G/A and IL-17F 7383A/G were associated with asthma in children (p?=?0.008, p?=?0.001, respectively). No association was found with IL-17F 7488A/G polymorphism. Haplotype analysis revealed a significant association between GA and AG haplotypes and asthma (p?=?0.004, p?=?0.02). When patients were stratified according to the atopic status, no significant association was detected with any of the three studied variants.

Conclusion: Our results suggested that SNPs in IL-17A and IL-17F confer susceptibility to childhood asthma in Tunisia.