Lack of Association between MYO9B Gene Polymorphisms and Susceptibility to Coeliac Disease in Caucasians: Evidence from a Meta-Analysis

Objective: Coeliac disease (CD) is a complex disorder influenced by environmental and genetic factors. Recently, a number of studies reported MYO9B gene is associated with CD, but the results are controversial. The aim of this study is to clarify this dispute by means of a meta-analysis.

Methods: The databases of PubMed, Web of Science, and Embase updated to August 2015 were retrieved. Crude odds ratio (OR) and corresponding 95% confidence interval (95%CI) as effect size were calculated by fixed or random effect model according to the heterogeneity.

Results: A total of 8 studies including 2272 cases and 5419 controls were enrolled in this meta-analysis. There was no significant association both in allele and genotype comparisons between the MYO9B (rs2305764, rs2305767, rs1457092) polymorphism and CD in Caucasian populations. No publication bias was detected in this meta-analysis.

Conclusions: This meta-analysis indicates that MYO9B gene polymorphisms might be not associated with CD susceptibility in Caucasians. Further studies are still needed for definitive conclusions.     

高迁移率族蛋白1基因多态性与少儿过敏性紫癜肾炎的相关性分析

目的:分析湖北十堰地区高迁移率族蛋白1(HMGB1)基因多态性与小儿过敏性紫癜肾炎(HSPN)的关系。方法:采用PCR产物直接测序法,检测分析278例过敏性紫癜肾炎少儿(HSPN组)和225例健康对照儿童(对照组)的HMGB1基因多态性及遗传平衡;比较各基因型在不同遗传模式下分布的组间差异和各等位基因,基因型和单体型组间分布差异及其与HSPN的相关性。结果:测序检测到HMGB1基因3个多态性位点rs1045411、rs2249825、rs1412125,其基因型分布符合Hardy-Weinberg遗传平衡,各基因型不同遗传模式(超显性、显性、隐性)在HSPN组和对照组分布差异无统计学意义(P0.05);HMGB1等位基因和基因型在对照组与HSPN组差异亦无统计学意义(P0.05);只有各基因位点单体型ACC在两组间差异有统计学意义(P0.05),且与增加HSPN风险存在强关联(OR=2.044,95%CI=1.220-3.425,P0.01)。结论:HMGB1基因ACC单体型可能与中国十堰地区汉族人群HSPN易感性相关。     

雌激素受体(ESR)基因多态性与疾病相关性的研究进展

雌激素受体是一种受配体激活的转录因子,由配体结合区、DNA结合区、转录激活区组成.雌激素受体对于对雌激素敏感的组织是一个重要的调节元件,如子宫内膜、乳腺、骨组织、肝脏等.雌激素的功能是刺激组织的增殖、分化,因此受体功能的变化可能有重要的临床意义.雌激素受体基因的多态性,单倍构型与它的生物学功能是相关的,研究认为ESR基因多态性与乳腺癌、骨质疏松症、HBV感染、子宫内膜异位症、冠心病等疾病存在相关性.该研究从雌激素受体的结构、功能与疾病的相关性方面作一综述.     

非小细胞肺癌组织中MMP12、HMGB1的表达及其临床意义

目的：研究非小细胞肺癌中人巨噬细胞金属弹性蛋白酶（humanmacrophagemetalloelas-tase,HME,namelyMMP12）、高迁移率族蛋白B1（highmobilitygroupbox—B1,HMGB1）蛋白表达并探讨其与病理学分级、淋巴结转移等的关系,以及两者的相关性。方法：用免疫组化sP法分别检测53例非小细胞肺癌组织（其中肺鳞状细胞癌30例、肺腺癌23例）和20例癌旁组织中MMP12、HMGB1蛋白表达。结果：MMP12和HMGB1在非小细胞肺癌组织的阳性表达率分别为69．8％和5．4％,在癌旁组织中分别为15％和20％（P〈0．01）;肺鳞癌中MMP12阳性表达率86．6％高于腺癌组47．8％;MMP12和HMGB1表达在非小细胞肺癌中与淋巴结转移呈正相关（P〈0．05）;MMP12和HMGB1在非小细胞肺癌组织中表达成正相关（P〈0．01）。结论：MMP12和HMGB1可能在非小细胞肺癌患者的浸润、转移中起作用,联合检测有利于预后判断。     

高迁移率族蛋白B1:从核蛋白到新的细胞因子

对高迁移率族蛋白B1（HMGB1）的认识曾长期局限于其调节基因转录的核蛋白功能。由于其作为细菌内毒素致死性的晚期介质这一重要功能不久前被发现,HMGB1新的生物学活性及其作用机制引起广泛兴趣和深入研究。HMGB1具有细胞因子的各种共同特性,包括其自分泌和旁分泌的特征、其受体依赖性以及它与其他炎症细胞因子相互诱生与协同作用的网络性。在感染性和非感染性的炎症、损伤和细胞坏死中,HMGB1介导了以巨噬细胞为主的固有免疫应答,发挥了至关重要的前炎症细胞因子和趋化因子的作用,同时还发现其对神经突触和肿瘤细胞的生长的促进作用。以HMGB1为靶子的治疗策略,包括对其产生和释放的抑制以及对其与受体（已知RAGE、TLR2和TLR4）结合的拮抗措施,在实验动物获得了可喜的成功并给临床应用带来了希望。     

clock基因rs1801260多态性与抑郁症的关联分析

目的:探讨clock基因与汉族人群抑郁症的关联。方法:用Snapshot SNP分型技术对155例抑郁症患者(其中包括133名抑郁症睡眠障碍者)和150名正常对照进行clock基因rs1801260位点分型,比较两组该基因多态性基因型和等位基因频率的差异。结果:与对照组相比,患者组rs1801260多态性的基因型和等位基因的频率差异无统计学意义(P0.05);对rs1801260多态性二种基因型C/T、T/T抑郁症的临床资料比较,显示HAMA总分差异具有统计学意义(t=2.012,P=0.047),其他各项没有明显差异(P0.05)。结论:clock基因rs1801260多态性可能与中国汉族抑郁症的发病无关联,但与抑郁症的焦虑程度可能关联。     

HMGB1在III期直肠癌患者肿瘤组织中的表达及与预后的关系

目的探讨高迁移率组蛋白B1(HMGB1)与III期直肠癌患者临床病理特征及术后3年无疾病生存(DFS)的关系。方法选取我院2011年2月至2015年12月诊治的III期直肠癌术后患者组织标本46例,免疫组化方法检测组织中HMGB1蛋白的表达情况,随访患者术后3年DFS。结果HMGB1在直肠癌组织中高表达24例,占52.2%,在癌旁组织中高表达10例,占21.7%,差异有统计学意义(χ2=9.144,P=0.002)。HMGB1的表达与III期直肠癌患者年龄、性别、手术方式、是否存在脉管癌栓或神经侵犯、pT分期、术前CEA水平、肿瘤生长类型无关,与pN分期、肿瘤分化程度、是否合并癌结节有关。46例III期直肠癌患者术后3年复发22例,总DFS率为52.2%,单因素分析显示HMGB1、分化程度、脉管癌栓或神经侵犯、术前CEA水平、pN分期与预后有关。多因素分析显示分化程度和术前CEA水平为独立预后因素。结论HMGB1的表达与III期直肠癌pN分期、肿瘤分化程度、是否合并癌结节有关。HMGB1高表达可能是III期直肠癌患者术后3年DFS的不利影响因素,但尚不能作为独立预后因素,检测HMGB1的表达对预后判断有一定的价值。     

人高迁移率族B1的表达及其多克隆抗体的制备与鉴定

目的以原核表达的人高迁移率族B1(High mobihty group box 1,HMGB1)蛋白为免疫原免疫日本大耳白兔,制备其兔多克隆抗体并进行鉴定。方法将人HMGB1 cDNA克隆于原核表达载体pQE-80L并转化大肠杆菌DH5α,经异丙基-β-D-硫代半乳糖苷(IPTG)诱导HMGB1表达,Ni^2 -NTA层析纯化后,用其免疫兔。以ELISA检测抗体效价,Western blot鉴定抗体特异性。结果成功表达并纯化了人HMGB1蛋白,纯化后纯度可达96％;ELISA法测定抗体效价为1：25600;Western blot结果显示所制备的抗体可特异性与人HMGB1蛋白结合。结论成功制备了兔抗人HMGB1多克隆抗体,为进一步研究HMGB1与相关疾病的关系打下了基础。     

Mini-review: The nuclear protein HMGB1 as a proinflammatory mediator

The intranuclear architectural protein that is termed high mobility group box chromosomal protein 1 (HMGB1) was recently identified as a potent proinflammatory mediator when present extracellularly. HMGB1 has been demonstrated to be a long-searched-for nuclear danger signal passively released by necrotic, as opposed to apoptotic, cells that will induce inflammation. Furthermore, HMGB1 can also be actively secreted by stimulated macrophages or monocytes in a process requiring acetylation of the molecule, which enables translocation from the nucleus to secretory lysosomes. Subsequent transport out of the cells depends on a secretion signal mediated by either extracellular lysophophatidyl-choline or ATP. HMGB1 passively released from necrotic cells and HMGB1 actively secreted by inflammatory cells are thus molecularly different. Extracellular HMGB1 acts as a cytokine by signaling via the receptor for advanced glycated end-products and via members of the Toll-like receptor family. The initiated inflammatory responses include the production of multiple cytokines, chemoattraction of certain stem cells, induction of vascular adhesion molecules and impaired function of intestinal epithelial cells. Therapeutic administration of HMGB1 antagonists rescues mice from lethal sepsis, even when initial treatment is delayed for 24 h after the onset of infection, establishing a clinically relevant therapeutic window that is significantly wider than for other known cytokines.     

Association of IFIH1 rs1990760 polymorphism with susceptibility to autoimmune diseases: A meta-analysis

Abstract

Published data on the association between the IFIH1 rs1990760 polymorphism and multiple autoimmune diseases are controversial and inconclusive. To more precisely estimate the association between the IFIH1 rs1990760 polymorphism and susceptibility to autoimmune diseases, a meta-analysis was conducted. Studies examining the association of the IFIH1 rs1990760 polymorphism with autoimmune diseases were exhaustively searched using PubMed, Web of Science and a review of the references. A total of 19 studies with 26 comparisons including 8 type 1 diabetes (T1D), 5 systemic lupus erythematosus (SLE), 5 Graves’ disease (GD), 2 multiple scleorosis (MS), 2 rheumatoid arthritis (RA), 2 Hashimoto's thyroiditis (HT), 2 autoimmune Addison’s disease (AAD) were available for this meta-analysis. Meta-analysis was performed for genotype T/T?+?T/C (dominant model), genotype T/T (recessive model) and T-allele in fixed or random-effects models. The overall odds ratios (ORs) and 95% confidence intervals (CIs) for T-allele were T1D (OR?=?1.184, 95% CI?=?1.142–1.229), SLE (OR?=?1.143, 95% CI?=?1.073–1.217), MS (OR?=?1.181, 95% CI?=?1.062–1.313) and RA (OR?=?1.115, 95% CI?=?1.004–1.239), respectively. For T1D and SLE, significant association was observed in the population of European ancestry, but not in the Asian population. This meta-analysis demonstrates that the IFIH1 rs1990760 T-allele confers susceptibility to T1D, SLE, MS and RA and suggests that the IFIH1 rs1990760 polymorphism might have no effect on GD and AAD. Our result provides further evidence for the notion of common gene underlying multiple autoimmune diseases.     

Associations between Cox-2 rs20417 and rs5275 polymorphisms and the risk of hepatocellular carcinoma: a meta analysis

Genetic polymorphisms of cyclooxygenase-2 (Cox-2) gene have been implicated in the susceptibility to hepatocellular carcinoma (HCC), but the findings from published studies are conflicting and inconclusive. To obtain a more precise estimate of the association of Cox-2 polymorphisms with HCC risk, we performed a meta-analysis of eight eligible case-control studies identified through an extensive online database search of PubMed, Embase, Cochrane Library, Web of Science, China National Knowledge Infrastructure, Wanfang and Chinese Biomedicine Database; after exclusion, 2324 cases and 2604 controls were included. The pooled odds ratios with corresponding 95% confidence intervals were calculated to assess associations, using fixed- or random-effect models. In addition, subgroup analysis by ethnicity and sensitivity analysis were performed. Our results showed that the Cox-2 rs20417 (-765 G/C) polymorphism was not associated with HCC risk in the studied genetic contrast modes (C vs. G, GC vs. GG, and CC + GC vs. GG). No significant association was found with ethnic groups examined (P > 0.05). Similarly, no significant association of the Cox-2 rs5275 (+ 8473 T/C) polymorphism and HCC risk was found under any of the studied contrasts (C vs. T, TC vs. TT, CC vs. TT, CC + TC vs. TT, CC vs. TC + TT). The present meta-analysis, combining all currently available data, suggests no significant associations of either Cox-2 polymorphism with HCC risk. Further studies with a larger sample size are needed to determine the association in different ethnicities.     

高迁移率族蛋白B1的致炎细胞因子作用研究进展

目前全身性炎症反应仍然是危重病人死亡的主要原因。近年来发现高迁移率族蛋白B1(HMGB1)这一传统DNA结合蛋白是强大的致炎细胞因子。HMGB1可由单核/巨噬细胞等固有免疫细胞在致炎细胞因子刺激下主动分泌,也可由坏死细胞被动释放。该分子刺激炎症细胞活化并向炎症部位聚集,促进炎症细胞因子分泌造成组织损伤。针对HMGB1的靶向治疗为临床救治感染危重病人拓展了治疗时机,因而具有很大的实际意义。HMGB1的致炎细胞因子作用是炎症损伤的研究热点之一。     

外源性HMGB1的研究进展

胞内HMGB1可以主动或被动释放到胞外,外源性HMGB1被认为是重要的晚期炎症因子,在炎症的发生发展中起重要作用.胞外HMGB1能与很多因子形成复合物,通过不同的受体通路影响转录因子NF-κB的活性,发挥不同的生物学效应.除发挥炎症因子的作用外,HMGB1在组织的修复和重建中的作用也不容小觑.另外,HMGB1预处理可以诱导产生免疫耐受,可能与脓毒症末期免疫功能低下有一定关系.     

IL-10-592A/C基因多态性与结核病易感性关系的Meta分析

目的:探讨白细胞介素-10(IL-10)基因592A/C位点多态性与结核病易感性的关系。方法:检索PubMed、Medline、EMbase等数据库,搜集相关病例对照研究文献。文献经筛选和方法学质量评价后,采用Stata12.0软件进行Meta分析,计算合并OR值及其95%CI,最后进行敏感性分析及发表偏倚评估。结果:共16篇文献纳入研究,包括结核病患者(病例组)4 115例,健康体检者(对照组)5 441例。Meta分析显示,在各个遗传模型中,IL-10-592A/C基因多态性与结核病总体发病风险关系不大。对纳入研究以世界各洲为分层因素进行分析,在亚洲人群中等位基因A者结核病发病率高于等位基因C者(OR=1.26,95%CI=1.08-1.28,P0.05);纯合子基因型AA者结核病发病率高于纯合子基因型CC者(OR=1.50,95%CI=1.07-2.12,P0.05);纯合子基因型AA者结核病发病率高于AC+CC基因型者(OR=1.33,95%CI=1.10-1.62,P0.05)。经Begg’s与Egger’s检验,纳入的所有研究未见明显发表偏倚。结论:IL-10-592A/C基因多态性中等位基因A可能与亚洲人群结核病易感性风险增高有关。     

Association of FAM167A-BLK rs2736340 Polymorphism with Susceptibility to Autoimmune Diseases: A Meta-Analysis

Objective: The purpose of this study is to evaluate the correlation between family with sequence similarity 167A-B lymphoid tyrosine kinase (FAM167A-BLK) rs2736340 polymorphism and autoimmune diseases.

Methods: Databases including PubMed, EMBASE, Chinese National Knowledge Infrastructure (CNKI), Chinese Biomedical Literature database (CBM) and Chinese database, Wan Fang database were used in searching eligible studies from January 1, 1966 to October 2, 2015. The odds ratios (ORs) and their 95% confidence intervals (CIs) were pooled to estimate the strength of the association.

Results: A total of 25 studies with 30,217 patients and 44,754 controls were included in the meta-analysis. The overall results showed FAM167A-BLK rs2736340 T allele was a risk allele for autoimmune diseases (OR 1.36, 95% CI 1.28–1.44, p < 0.001). In the subgroup by ethnicities, the results suggested T allele was an increased risk in North America, Europe, and Asia (OR 1.33, 95% CI 1.10–1.60, p = 0.004; OR 1.26, 95% CI 1.22–1.31, p < 0.001; and OR 1.46, 95% CI 1.40–1563, p < 0.001, respectively), but not in Africa. Subgroup analysis in different genetic models (recessive, dominant, and additive) revealed significant association between rs2736340 and autoimmune diseases in Asia and North America, but not the recessive model in Europe or Africa, or the additive model in Africa. Stratification analysis by diseases suggested FAM167A-BLK rs2736340 had a positive association with rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), systemic sclerosis (SSc) and Kawasaki disease, primary Sjogren’s syndrome (pSS), primary antiphosholipid syndrome (APS), and myositis.

Conclusion: The current meta-analysis suggested that FAM167A-BLK rs2736340 polymorphism is associated with several autoimmune diseases.     

Analysis of the Association of Polymorphisms rs5743708 in TLR2 and rs4986790 in TLR4 with Atopic Dermatitis Risk

Background: We carried out a meta-analysis to assess whether Toll-like receptor 2 (TLR2) rs5743708 and Toll-like receptor 4 (TLR4) rs4986790 polymorphisms are associated with the risk of atopic dermatitis.

Methods: A systematic search of PubMed, Embase, and Web of Science was performed to identify eligible case–control studies on the association of rs5743708 and rs4986790 with the risk of atopic dermatitis. Statistical analyses of the odds ratio (OR), 95% confidence interval (CI), and p value were performed using STATA software.

Results: Our meta-analysis included a total of nine case–control studies, all involving Caucasian populations. With respect to the TLR2 rs5743708 G/A polymorphism, there was a statistically significant difference in the overall risk of atopic dermatitis between the case and control groups [OR = 2.07, p value of association test, p_{(association)} = 0.001 in allele (A vs. G) model; OR = 1.93, p_{(association)} = 0.004 in carrier (A vs. G) model; OR = 2.07, p_{(association)} = 0.001 in heterozygote (GA vs. GG) model; OR = 1.99, p_{(association)} = 0.001 in dominant (GA+ AA vs. GG) model]. Similar positive results were observed in the subgroup analysis of “population-based control.” For the TLR4 rs4986790 A/G polymorphism, an increased atopic dermatitis risk was detected in the case group under the allele [OR = 1.78, p_{(association)} = 0.013], carrier [OR = 1.69, p_{(association)} = 0.027] and heterozygote [OR = 1.74, p_{(association)} = 0.020] models, but not the dominant [OR = 1.44, p_{(association)} = 0.070] model, in comparison to the population-based control group.

Conclusion: Our meta-analysis revealed a novel finding that the heterogeneous “GA” genotype of the TLR2 rs5743708 and “AG” genotype of the TLR4 rs4986790 may be associated with increased susceptibility to atopic dermatitis in Caucasians.     

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 between CARD8 rs2043211 Polymorphism and Inflammatory Bowel Disease: A Meta-Analysis

Objective: The aim of this study was to determine whether caspase recruitment domain-containing protein 8 (CARD8) rs2043211 polymorphism was associated with susceptibility to inflammatory bowel disease (IBD).

Methods: Relevant studies were searched using PubMed and Embase up to February 2014. A meta-analysis was conducted on the association between rs2043211 polymorphism and IBD using: (1) allele contrast, (2) the dominant model, (3) the recessive model, and (4) homozygote contrast. The pooled estimated of risk was obtained by random-effects model or fixed-effects model. Publication bias was assessed by Egger’s test.

Results: Eight relevant articles with a total of 10?534 IBD patients [6785 Crohn’s disease (CD), 3713 ulcerative colitis (UC) and 36 indeterminate colitis (IC)] and 6755 healthy controls were included in the meta-analysis, which consisted of 12 studies, 12 for CD, 10 for UC, 2 for IC. There was no significant association between rs2043211 polymorphism and IBD, CD, and IC in overall population. However, stratified meta-analysis by ethnicity showed significant association between rs2043211 polymorphism and CD in the European population under the dominant model [odds ratio (OR)?=?1.210, 95% confidence interval (CI)?=?1.013–1.445, p?=?0.036] and homozygote contrast (OR?=?1.212, 95% CI?=?1.005–1.461, p?=?0.044).

Conclusions: Our meta-analysis results indicated significant association between rs2043211 polymorphism and the susceptibility to CD under the dominant model and homozygote contrast in the European population.