MicroRNA 146a基因单核苷酸多态性与卵巢上皮性肿瘤易感性的研究

目的 分析microRNA 146a(miR-146a)基因单核苷酸多态(single nucleotide polymorphisms,SNPs)位点rs2910164(G/C)与卵巢上皮性肿瘤易感性的关系.方法 采用病例-对照研究方法,纳入卵巢上皮性肿瘤患者184例为病例组,无卵巢肿瘤病史的人群200例为对照组.使用基因测序方法确定miR-146a基因rs2910164 (G/C)位点的多态基因型,比较不同基因型在病例组和对照组中的分布情况,并对年龄、月经周期、产次、口服避孕药、家族病史因素进行分层研究.结果 在miR-146a基因多态位点rs2910164(G/C)处,病例组和对照组均有GG、GC和CC 3种基因型,且两组的基因型总体分布差异具有统计学意义(P=0.002).与CC基因型相比,GG和GC基因型携带者的卵巢上皮性肿瘤发病风险较低(OR=0.396,95％ CI=0.219～0.717,P=0.002;OR=0.502,95％ CI =0.308～0.818,P=0.006).分层分析显示,这种影响在年龄≤50岁、产次≤2、未口服避孕药、无家族病史的情况下差异显著,x2检验P值分别为:0.001、0.000、0.001、0.001.结论 miR-146a单核苷酸多态位点rs2910164(G/C)与卵巢上皮性肿瘤易感性相关.GG和GC基因型携带者患卵巢上皮性肿瘤的发病风险低于CC基因型携带者.     

CDKAL1基因rs7754860位点G<C多态性与2型糖尿病易感关系的Meta分析*◆

背景：遗传学研究显示2型糖尿病可能存在遗传易感性,但研究结论存在一定的差异。 目的：探讨CDKAL1(细胞周期素依赖激酶5调节亚单位相关蛋白1类似物1)基因rs7754860位点G相似文献   

DNMT1和DNMT3B基因多态性与食管癌发病风险的关联分析

目的 探讨DNMT1基因多态性位点(rs16999593,rs2228611)和DNMT3B基因多态性位点(rs2424908)的基因型与食管癌及其病理参数的关联.方法 采用病例对照研究,使用MassARRAY检测技术对258例食管癌患者和260例健康对照的3个多态性位点基因型分布进行分析.采用Logistic回归模型分析各基因型与食管癌发生的关系并比较不同基因型与食管癌病理参数的关系.结果 DNMT1基因rs16999593位点TC基因型(OR =0.69,95％ CI:0.47～1.00)和rs2228611位点GA基因型(OR =0.67,95％ CI:0.46 ～0.98)与食管癌的低风险相关,rs16999593 TC、CC基因型与食管癌分化程度相关(中分化:TC vs.TT:OR =0.53,95％ CI:0.33 ～0.86;低分化:CC vs.TT:OR=2.79,95％ CI:1.12～6.91),rs2228611 GA基因型与高分化食管癌(GA vs.GG:OR=0.47,95％ CI:0.25 ～0.88)和无周围淋巴结转移(GA vs.GG:OR=0.62,95％ CI:0.39 ～0.98)有关,DNMT3B基因rs2424908 CC基因型与肿瘤Ⅲ～Ⅳ分期(CC vs.TT:OR=0.38,95％CI:O.15～0.92)及远端淋巴结转移(CC vs.TT:OR =0.18,95％ CI:0.40 ～0.80)相关.结论 本研究发现rs16999593和rs2228611位点与食管癌的发生及分化程度相关,rs2228611和rs2424908位点和淋巴结转移相关,rs2424908位点和肿瘤分期有相关性.     

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。     

IL-33基因单核苷酸多态性与中国南方汉人炎症性肠病临床表型相关*

 目的：探讨白细胞介素33（IL-33）基因单核苷酸多态性（SNP）与中国南方汉人炎症性肠病（IBD）的关系。方法：通过HapMap数据库筛选出IL-33基因8个SNP序列标签;对250例克罗恩病（CD）患者、115例溃疡性结肠炎（UC）患者及622名健康对照采用MALDI-TOF MS技术进行基因分型检测。结果：8个SNP位点的基因型及等位基因频率在病例（包括CD及UC）及对照组中无明显差异（P>0.05）。基因型-临床表型分析发现多个SNP位点与CD部分临床表型相关：rs10118795 T等位基因是肠外表现的保护因素（P<0.05, OR=0.513, 95% CI： 0.281～0.938）,而rs7025417 CC基因型是肠外表现的危险因素（P<0.05, OR=1.363, 95% CI： 1.006～1.846）;rs10118795 C等位基因降低肛周病变风险（P<0.05, OR=0.480, 95% CI： 0.232～0.994）,而rs10975519 CC基因型增加肛周病变风险（P<0.05, OR=2.054 , 95% CI： 1.053~4.009）;rs10975509 G等位基因是上消化道型CD的危险因素（P<0.05, OR=3.570, 95% CI： 1.328~9.600）,且其A等位基因携带者发生回结肠型CD的风险增加（P<0.05, OR=0.613, 95% CI： 0.377~0.996）;在治疗方面,rs10118795、rs10975509和rs7025417基因型均与CD患者英夫利昔单抗治疗后30周黏膜愈合相关（P<0.05,P<0.01,P<0.05）。UC患者中,未发现这8个SNP位点影响其临床表型（P>0.05）。结论：本研究中IL-33基因8个SNP位点不增加中国南方人群CD及UC发病风险,但部分位点影响CD的临床表型,某些SNP位点可能成为预测英夫利昔单抗疗效的标志物。     

STAT4基因rs7574865位点多态性与武陵山地区类风湿性关节炎具有相关性

目的探讨信号转导子与转录激活子4(STAT4) rs7574865和miRNA146a rs2910164基因单核苷酸多态性(SNP)与武陵山地区类风湿性关节炎(RA)的相关性。方法选择287例RA患者和同期305例体检的健康人群为对照组,采用多重PCR结合高通量测序技术(Hi-SNP)测定RA患者和同期对照人群rs7574865和rs2910164位点基因型,用χ2检验比较分析两组人群中基因型和等位基因型频率分布,并分析这两个位点多态性与RA发病风险的相关性以及与患者类风湿因子(RF)和抗环瓜氨酸肽(ACCP)抗体水平的相关性。结果 rs7574865位点的基因型频率在两组间存在统计学差异,TT基因型和T等位基因均是RA的易感因素(OR=2. 42,95%CI:1. 37～4. 28; OR=1. 43,95%CI:1. 12～1. 82),同时显性模型和隐性模型也显示与RA的发病易感相关。rs2910164位点单核苷酸多态性与RA易感性无关,并且rs7574865和rs2910164位点多态性与RF和ACCP抗体水平均无显著相关性。结论 STAT4 rs7574865位点单核苷酸多态与武陵山地区RA的发病相关,与患者RF和ACCP抗体水平无关;而miRNA146a rs2910164多态性与RA无显著相关性。     

CDKAL1基因rs4712523多态性与内蒙古地区汉族人群2型糖尿病相关

目的 研究内蒙古地区汉族人群CDKAL1基因rs4712523单核苷酸多态性(SNP)的等位基因和基因型频率分布与2型糖尿病(T2DM)的相关性.方法 采用等位基因特异性聚合酶链式反应(AS-PCR),对382例内蒙古地区汉族人(其中T2DM组192例,对照组190例)rs4712523进行基因分型.结果 T2DM组中rs4712523的G等位基因频率和GG基因型频率分别为47.4％和6.3％,均显著高于对照组的35.3％和3.2％(P＜0.05).G等位基因携带者患T2DM的风险是A等位基因的1.654倍(OR=1.654,95％ CI=1.237-2.212).结论 CDKAL1基因rs4712523多态性位点的G等位基因可能是内蒙古地区汉族人T2 DM的易感基因之一.     

糖皮质激素受体遗传多态性与2型糖尿病相关性研究

目的 探讨糖皮质激素受体(GR)单核苷酸多态性与2型糖尿病(T2MD)易感性及人体体型的相关性.方法 采用病例-对照研究设计,从解放军总医院健康体检中心的体检患者中,募集40例T2MD患者和127例对照.结合三种不同的SNP位点选择方法,采用上海天昊生物科技有限公司的iMLDRTM多重SNP分型技术对入选SNP位点进行基因分型.采用非条件Logistic回归,校正年龄、性别、吸烟、饮酒后,分析基因型与T2MD易感性的关系.得到的阳性位点,进一步采用协方差分析,校正年龄、性别、吸烟、饮酒后,评价其与体重指数(BMI)和腰臀比(WHR)的相关性.结果 共选取14个SNP位点,其中rs10052957突变型在病例组中频率为零,故未纳入统计分析.所有的13个SNP位点在病例和对照组中的基因分型均符合Hardy-Weinberg平衡.rs9324924 TT基因型(OR [95％CI]=3.12[1.06 ～9.17],P=0.039)和rs9324921 AA基因型(OR [95％CI]=14.92[1.39～160.60],P=0.026)发生T2DM的风险较野生型增高,且两基因型的BMI[P=0.023 (rs9324924);P=0.002(rs9324921)]、WHR[P=0.033 (rs9324924);P=0.003(rs9324921)]也较野生型明显增高.结论 在本研究中,GR基因rs9324924、rs9324921与T2DM易感性和体型有关,其中纯和突变型T2DM发病风险明显增加,且更具有肥胖倾向.     

MMP-9 R279Q基因多态性与冠心病易感性的Meta分析

 目的 探讨MMP-9 R279Q基因多态性与冠心病易感性的关系。方法 检索PubMed,获取2012年1月1日以前发表的MMP-9 R279Q基因多态性与冠心病易感性的病例-对照研究。以冠心病组与对照组人群基因型分布的OR值及95%CI为效应指标,在纯合子比较模型、显性模型和隐性模型中采用固定效应方法进行合并分析, 并进行偏倚评估,应用STATA11.0软件进行统计学处理。结果 共纳入文献5篇,在MMP-9 R279Q多态性位点,基因型比较模型中合并OR值为0.925 (95% CI = 0.847-1.009),纯合子比较模型合并OR值为0.866 (95% CI = 0.713-1.052),显性模型合并OR值为0.909 (95% CI = 0.809-1.020),隐性模型合并OR值为0.902 (95% CI = 0.750-1.086)。结论 MMP-9 R279Q基因多态性可能与冠心病易感性无关。     

抗精神病药物引发的体重增加与HTR2C基因-759C/T 多态性关联的Meta分析

目的 探讨抗精神病药物在治疗精神分裂症患者过程中出现的体重增加与5羟色胺2C受体（HTR2C）基因启动子区-759C/ T（rs3813929）单核苷酸多态性的关系。方法 在Pubmed、 Springer、China biology medicine disc（CBM）、谷歌学术、万方数据库等检索1990~2017年精神分裂症患者中有关HTR2C-759C/T 基因多态性与抗精神病药物诱导的体重增加关联性研究的文献,对-759C/T 位点（CT+TT）/CC,（CT+CC）/TT基因型进行Meta分析。用RevMan version 5.3计算OR值及95%可信区间,并按人种因素作亚组分析。结果 共有20篇文献符合纳入标准,经Meta分析发现HTR2C-759T与抗精神病药物引发的体重增加呈显著负相关[（CT+TT）/ CC OR=0.42,95%CI（0.26~0.66）,P=0.0002]。亚组分析中,高加索人群和东亚人群含HTR2C-759T患者的体重增加占比人数显著低于CC基因型患者（高加索人群OR=0.48,95%CI（0.26~0.88）,P=0.020,东亚人群OR=0.34,95%CI（0.17~0.69）,P=0.002）。HTR2C-759C 与抗精神病药物引发的体重增加有正相关趋势[（CT+CC）/TT OR=2.29,95% CI（1.00~5.23）,P=0.05]。亚组分析中高加索人群[OR=2.58,95% CI（0.61~10.94）,P=0.200]和东亚人群（OR=2.13,95%CI（0.78~5.86）,P=0.14）结论一致,差异无统计学意义（P＞0.05）。结论 HTR2C 基因启动子-759C/T单核苷酸多态性与抗精神病药物导致的患者体重增加相关联,携带HTR2C-759T可能是限制体重增加的保护因子。     

Association between the three functional miR-146a single-nucleotide polymorphisms,rs2910164, rs57095329, and rs2431697, and autoimmune disease susceptibility: A meta-analysis

Studies suggest associations between the miR-146a single nucleotide polymorphisms (SNPs) and susceptibility to autoimmune diseases. However, the results are inconsistent and inconclusive. Therefore, the aim of this study was to arrive at a conclusion about the association between the three functional miR-146a SNPs and autoimmune disease risk. Studies were identified through PubMed/MEDLINE searches for studies published up to January 2016 using as keywords rs2910164, rs57095329, rs2431697, and miR-146a polymorphisms. Thirty studies were included in the meta-analysis. The SNP rs2910164?G?>?C was found to be associated with increased risk of multiple sclerosis (CC?+?CG versus GG, OR = 1.25, 95% CI: 1.01–1.55), with decreased risks of psoriasis (C versus G, OR = 0.81, 95% CI: 0.69–0.96; CC versus GC?+?GG, OR = 0.73, 95% CI: 0.56–0.94), Behcet’s disease (CC versus GC?+?GG, OR = 0.60, 95% CI: 0.50–0.73), asthma (C versus G, OR = 0.80, 95% CI: 0.69–0.93; CC versus GC?+?GG, OR = 0.65, 95% CI: 0.48–0.86), and uveitis (CC?+?CG versus GG, OR = 0.61, 95% CI: 0.49–0.77). The SNP rs2431697 C?>?T was found to be associated with an increased risk of SLE (T versus C, OR = 1.26, 95% CI: 1.15–1.38; TC?+?TT versus CC, OR = 1.28, 95% CI: 1.03–1.58; TT versus TC?+?CC, OR = 1.40, 95% CI: 1.21–1.62). The SNP rs57095329 A?>?G was found to be associated with an increased risk of SLE (G versus C, OR = 1.25, 95% CI: 1.17–1.35). The miR-146a SNPs rs2910164, rs57095329, rs2431697 are associated with susceptibility to certain autoimmune diseases. However, for other autoimmune diseases, they may be protective or insignificant.     

Predictive role of miR-146a rs2910164 (C>G), miR-149 rs2292832 (T>C), miR-196a2 rs11614913 (T>C) and miR-499 rs3746444 (T>C) in the development of hepatocellular carcinoma

We conducted a case-control study to evaluate the association of miR-146a rs2910164 (C>G), miR-149 rs2292832 (T>C), miR-196a2 rs11614913 (T>C) and miR-499 rs3746444 (T>C) polymorphisms with the risk of hepatocellular carcinoma. A total of 274 patients with HCC were collected between January 2013 and December 2014. The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was taken to determine the polymorphism of miR-146a C>G, miR-149 T>C, miR-196a2 T>C and miR-499 T>C. By comparing with control groups, patients with HCC were more likely to be males (OR=2.01, 95% CI=1.38-2.95), have older age (OR=1.52, 95% CI=1.09-2.13), have a history of alcohol drinking (OR=2.09, 95% CI=1.49-2.93), and be infected with HBV (OR=32.98, 95% CI=19.70-55.46) and HCV (OR=56.26, 95% CI=23.28-152.98) infection. By conditional regression analysis, individuals carrying the TC and CC genotypes of miR-196a2 T>C were found to be associated with an elevated risk of HCC compared to the TT genotype, and the adjusted odds ratio were 1.50 (1.03-2.17) and 2.86 (1.60-5.16), respectively. Moreover, the TC+CC genotype was correlated with an increased risk of HCC (OR=1.69, 95% CI=1.19-2.41) compared to the wide-type genotype. In conclusion, our results suggested that miR-196a2 T>C polymorphism is associated with HCC risk in Chinese population.     

Association of four common SNPs in microRNA polymorphisms with the risk of hepatocellular carcinoma

We conducted a case-control study to investigate genetic variants of miR-146a rs2910164, miR-196a2 rs11614913, miR-149 rs2292832 and miR-499 rs3746444 in the development of HCC in a Chinese population. This case-control study included 266 HCC patients and 266 control subjects between January 2012 and December 2013. Conditional logistical regression analysis indicated that TT genotype and T allele of miR-196a2 rs11614913 carried a 2.29-fold (95% CI = 1.30-4.05) and 1.60-fold (95% CI = 1.11-2.32) increased risk of HCC when compared with CC genotype, respectively. The subgroup analysis indicated that the effect of miR-196a2 rs11614913 polymorphism was influence by HBV infection. HBV infection subjects carrying the CT + TT genotype of miR-196a2 rs11614913 had an increased risk of HCC, and the OR (95% CI) was 2.89 (1.19-7.02). In conclusion, miR-196a2 rs11614913 polymorphism may contribute to identifying individuals, especially in HBV-infected subjects, who are at high risk for HCC.     

Association study of polymorphisms in miRNAs with T2DM in Chinese population

Accumulated evidence indicates that microRNA (miRNA or miR) is involved in the development of type 2 diabetes (T2DM). Several studies have shown that single nucleotide polymorphisms (SNPs) located in miRNAs are associated with T2DM in Caucasian populations. The association studies of miRNA''s SNPs with T2DM in Asian are rarely reported, and there are distinct genetic differences between Caucasian and Asian populations. The focus of this study, therefore, is the association of T2DM with five SNPs (rs895819 in miR-27a, rs531564 in miR-124a, rs11888095 in miR-128a, rs3820455 in miR-194a and rs2910164 in miR-146a) located in five miRNAs in a Han Chinese population. A total of 738 subjects with T2DM and 610 non-diabetic subjects were genotyped using the TaqMan method. Next, the associations between the five SNPs with T2DM and individual metabolic traits were evaluated. Our data showed that the C allele of rs531564 in miR-124a may protect against T2DM (P=0.009, OR=0.758; 95%CI: 0.616-0.933). Conversely, the C allele of rs2910164 in miR-146a may increase the risk of developing T2DM (P<0.001, OR=1.459; 95%CI: 1.244-1.712). However, these five SNPs did not exhibit significant associations with individual metabolic traits in either the T2DM or non-diabetic groups. Our results revealed that genetic variations in miRNAs were associated with T2DM susceptibility in a Han Chinese population, and these results highlight the need to study the functional effects of these variants in miRNAs on the risk of developing T2DM.     

Association between miRNA-146a rs2910164 (G/C) polymorphism with the susceptibility to chronic HBV infection and spontaneous viral clearance in an Iranian population

Hepatitis B virus (HBV) infection is one of the clinical dilemmas in chronic liver diseases. MicroRNAs (miRNAs) are small noncoding RNA molecules that play an important role in the pathogenesis of liver diseases and single nucleotide polymorphisms (SNPs) in miRNA genes affect the clinical course of HBV infection. Previous studies have shown that miRNA-146a rs2910164 polymorphism can be associated with the pathogenesis of liver diseases such as hepatocellular carcinoma. The present study investigated the association between miRNA-146a rs2910164 polymorphism and susceptibility to HBV infection in an Iranian population. The study comprised 266 patients with chronic HBV infection, 172 patients with spontaneous viral clearance (SVC) after acute HBV infection, and 266 healthy control adjusted for sex and age. The genotyping of the miRNA-146a rs2910164 polymorphism was performed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. Our data revealed that GG genotype and G allele of miRNA-146a rs2910164 SNP is dominated (P < 0.001) in patients with chronic HBV infection (Odds ratio [OR] = 3.92; 95% confidence interval [CI] = 2.1-7.32). miRNA-146a rs2910164 polymorphism showed a statistically significant association (P < 0.001) between CC genotype and allele C with SVC (OR = 2.92; 95% CI = 1.56-546). Our findings suggest miRNA-146a SNP (C/G) in our population may be associated with the susceptibility to HBV infection and CC genotype is associated with SVC. Also, the GG genotype and G allele at miRNA-146a rs2910164 is associated with chronic HBV infection in our population.     

Genetic variation in miR-100 rs1834306 is associated with decreased risk for esophageal squamous cell carcinoma in Kazakh patients in northwest China

MicroRNAs (miRNAs) are a family of small noncoding RNAs that act as oncogenes and tumor suppressors. Single nucleotide polymorphisms (SNPs) in miRNAs may be associated with changes in phenotype and function. The aim of this study was to verify whether genetic variations in candidate microRNA (miRNA or miR) genes could contribute to esophageal squamous cell carcinoma (ESCC) susceptibility. A case-control study in 248 Kazakh patients with ESCC and 300 frequency matched control subjects was carried out to examine the potential association of six miRNA (miR-100 rs1834306, miR-34b/c rs4938723, miR-375 rs6715345, miR-146a rs2910164, miR-423 rs6505162 and miR-373 rs12983273) polymorphisms with risk of ESCC. We found that miR-100 rs1834306 T>C polymorphism was associated with a significant decreased risk of ESCC. In the recessive model, when the miR-100 rs1834306 TT/TC genotypes were used as the reference group, the CC homozygote genotype was associated with a significant decreased risk for ESCC (adjusted OR=0.495, 95% CI: 0.349-0.702, P=8.05×10^-5). In the dominant model, when the miR-100 rs1834306 TT genotypes was used as the reference group, the TC/CC genotype were associated with a borderline statistically decreased risk for ESCC (adjusted OR=0.665, 95% CI: 0.430-1.031, P=0.067). In addition, the miR-100 rs1834306 C allele in the Kazakh population was significantly associated with decreased risk of ESCC (OR=0.609, 95% CI: 0.48-0.78, P=8.37×10^-5). These findings indicated that functional polymorphism miR-100 rs1834306 C>T might contribute to decreased ESCC risk.     

Association between survivin -31G > C promoter polymorphism and cancer risk: a meta-analysis

Survivin is an inhibitor of apoptosis protein and has a crucial role in the development of cancer. The survivin -31G>C (rs9904341) promoter polymorphism influences survivin expression and has been implicated in cancer risk. However, conflicting results have been published from studies on the association between survivin -31G>C polymorphism and the risk of cancer. To clarify the role of this polymorphism in cancer, we performed a meta-analysis of all available and relevant published studies, involving a total of 3485 cancer patients and 3964 control subjects. Odds ratios (ORs) and 95% confidence intervals (CIs) were used to assess the strength of the associations. The overall results indicated that the variant genotypes were associated with a significantly increased cancer risk (CC vs GG: OR=1.58, 95% CI=1.20-2.10; CC/GC vs GG: OR=1.23, 95% CI=1.00-1.51; CC vs GG/GC: OR=1.51, 95% CI=1.23-1.85). In the stratified analyses, significantly increased risk was associated with the Asian populations (CC vs GG: OR=1.67, 95% CI=1.16-2.40; CC vs GG/GC: OR=1.50, 95% CI=1.17-1.91). We also performed the analyses by cancer type, and no statistical association was observed. The results suggest that the survivin -31G>C promoter polymorphism might be associated with an increased risk of cancer, especially in the Asian populations.     

Association of two polymorphisms rs2910164 in miRNA-146a and rs3746444 in miRNA-499 with rheumatoid arthritis: A meta-analysis

Background

It has been reported that two single nucleotide polymorphisms (SNPs) rs2910164 in miRNA-146a and rs3746444 in miRNA-499 might be associated with the susceptibility to rheumatoid arthritis (RA). Owing to mixed and inconclusive results, we conducted a meta-analysis to systematically summarize and clarify the association between the two SNPs and RA risk.

Methodology/main results

A systematic search of studies on the association of two SNPs with susceptibility to RA was conducted in PubMed and Embase. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were used to pool the effect size. A total of 6 case-control studies on rs2910164 and 3 studies on rs3746444 were included. Though no evidence of association was found between rs2910164 polymorphism and RA risk in all the genetic models, a trend of reduced risk could be drawn. (C versus G: OR = 0.93, 95% CI 0.82–1.05; GC versus GG: OR = 0.89, 95% CI 0.73–1.10; CC versus GG: OR = 0.84, 95% CI 0.64–1.10; GC/CC versus GG: OR = 0.89, 95% CI 0.73–1.08; CC versus GC/GG: OR = 0.94, 95% CI 0.77–1.14). A significant increased risk of RA was observed in the rs3746444 polymorphism in homozygote comparison, recessive comparison, and allele comparison, but there was insufficient data to fully confirm the association of RA and rs3746444 in miRNA-499.

Conclusions

MiRNA-146a rs2910164 polymorphism is not associated with RA risk, while miRNA-499 rs3746444 polymorphism is correlated with RA risk. However, the results of miRNA-499 rs3746444 should be interpreted with caution due to limited sample and heterogeneity. Large-scale and well-designed studies are needed to validate our findings.     

Comprehensive review of genetic association studies and meta-analysis on miRNA polymorphisms and rheumatoid arthritis and systemic lupus erythematosus susceptibility

BackgroundMicroRNAs (miRNAs), small RNA molecules, play a role in the development and differentiation of immune cells in both innate and adaptive immune responses. Our study was aimed to investigate the association between three miRNA polymorphism and rheumatoid arthritis (RA) or systemic lupus erythematosus (SLE) by using meta-analysis approach.MethodsA PubMed database search was conducted during August 2013 to identify case–control studies of miRNAs and RA or SLE risk. Two authors independently extracted information on the study design, the characteristics of the study participants, exposure and outcome assessments. The fix-effects and random-effects models were used for the risk estimates by Stata 11.0 software.ResultsOur meta-analysis of six case–control studies involving a total of 998 RA cases and 1493 controls identified no significant association between mir-146a rs2910164 and RA, with an overall OR of 0.843 (95% CI = 0.642–1.105; CC vs. GG). No association was observed in three studies with a total of 1532 cases and 2168 controls between miR-146a rs2910164 and SLE risk (OR = 0.911, 95% CI = 0.710–1.171; CC vs. GG). Three studies with a total of 529 cases and 595 controls evaluated the mir-499 rs3746444 polymorphism and its association with RA. There was a decreased overall risk of RA under the allelic and genotypic models [OR = 0.616, 95% CI = 0.384–0.981, (T vs. C allele) and OR = 0.386, 95% CI = 0.226–0.659, (TT vs. CC)]. Two studies with 4826 cases and 4181 controls evaluated miR-146a rs57095329 and its association with SLE. There was a significant association between miR-146a rs57095329 and SLE (OR = 1.263, 95% CI = 1.136–1.405, G vs. A allele).ConclusionsThe present meta-analysis suggests important roles for the mir-499 rs3746444 polymorphism in RA, especially in the Caucasian population and for miR-146a rs57095329 polymorphism in SLE. Further studies with large sample size are needed to confirm these associations.