解整合素-金属蛋白酶33基因T1位点多态性与毛细支气管炎的相关性研究

目的 探讨在广州地区汉族儿童中解整合素-金属蛋白酶33(ADAM33)基因中的T1位点不同基因型及等位基因的分布频率与毛细支气管炎的相关性.方法 采用聚合酶链反应结合限制性片段长度多态性(PCR-RFLP)方法,检测60例毛细支气管炎儿童(试验组)及60例对照儿童(对照组)T1位点单核甘酸多态性.结果 在广州地区儿童中可检测到Tl位点的3种基因型(TT CT和CC),试验组3种基因型的分布频率分别为78.3％、16.7％和5％,对照组分别为88.3％、10％和1.7％,两组分布频率差异无统计学意义(-2.36,P＞0.05);试验组的T等位基因和C等位基因频率分别为86.7％和13.3％,对照组分别为93.3％和6.7％,两组分布差异也无统计学意义(x2=2.27,P＞0.05).结论 在广州地区汉族儿童中,ADAM33基因Tl位点基因多态性与毛细支气管炎发病无关.     

Association of ADAM33 gene polymorphisms with asthma in Indian children

Asthma is the most common chronic disorder in childhood, and asthma exacerbation is an important cause of childhood morbidity and hospitalization. In the present study, the relationship between single-nucleotide polymorphisms (SNPs) of the ADAM33 gene and asthma in Indian children has been examined using a case-control study. Five SNPs of the ADAM33 gene, F+1(rs511898) G/A, S2 (rs528557) G/C, ST+4 (rs44707) A/C, ST+5 (rs597980) C/T and V4 (rs2787094) C/G, were analyzed in 211 asthma cases and 137 controls aged 1-15 years using the PCR-restriction fragment length polymorphism method. Data were statistically analyzed using the χ(2)-test and logistic regression model. Haplotype estimation and linkage disequilibrium were conducted using the expectation-maximization algorithm. The genotypes and allele frequencies of SNPs S2 and ST+5 of the ADAM33 gene were significantly associated with asthma risk (P = 0.020 - < 0.001), whereas F+1, ST+4, V4 homozygous mutant genotypes and mutant alleles were significantly associated with increased asthma risk (P = 0.031 - < 0.001). A positive association was also found with haplotypes AGCCT, GGACT and AGCCC (P = < 0.001, odds ratio (OR) = 6.10-6.50), whereas ACAGT, AGCGC, AGCGT, GCAGC and GCCGT showed protective association with asthma (P = 0.019-0.000, OR = 0.50-0.20). Taken together, out results suggest that ADAM33 gene polymorphisms may modify individual susceptibility to develop childhood asthma in the Indian population.     

A disintegrin and metalloprotease 33 (ADAM33) gene polymorphisms and the risk of asthma: A meta-analysis

Polymorphisms in the ADAM33 gene have been associated with asthma, but the data are controversial. Therefore, we reviewed the related studies and quantitatively summarized the associations between ADAM33 polymorphisms and asthma risk using meta-analysis. A dominant model (AA+Aa vs. aa), recessive model (AA vs. Aa+aa), additive model (AA vs. aa) and allelic model (A vs. a) were used to estimate the association between ADAM33 polymorphism and asthma risk. A total of 29 case–control studies referring to 14 SNPs were identified: rs2280091(T1), rs2787094(V4), rs528557(S2), rs2280090(T2), rs511898(F+1), rs44707(ST+4), rs3918396(S1), rs543749(V−1), rs574174(ST+7), rs597980(ST+5), rs2853209(S+1), rs2280089(T+1), rs612709(Q−1), and rs3746631(V5). The results indicated that S1, V−1, V5, S+1, S2, ST+4, ST+7, ST+5, and Q−1 were not associated with asthma. Significant associations were found with the T1, V4, F+1 and T+1 polymorphisms in the overall population. In the subgroup analysis by ethnicity, a positive result was only found for the T1, V4, F+1 and T2 polymorphisms in Asia but not in Europe or Latin America. This meta-analysis provides evidence that the T1, V4, F+1, T2, and T+1 polymorphisms in the ADAM33 gene are risk factors for asthma, especially in the Asian population.     

Association of ADAM33 gene polymorphisms with adult allergic asthma and rhinitis in a Chinese Han population

Background

Neuroimaging studies have demonstrated volumetric abnormalities in limbic structures of suicide victims. The morphological changes might be caused by some inherited neurodevelopmental defect, such as failure to form proper axonal connections due to genetically determined dysfunction of neurite guidance molecules. Limbic system-associated membrane protein (LSAMP) is a neuronal adhesive molecule, preferentially expressed in developing limbic system neuronal dendrites and somata. Some evidence for the association between LSAMP gene and behavior has come from both animal as well as human studies but further investigation is required. In current study, polymorphic loci in human LSAMP gene were examined in order to reveal any associations between genetic variation in LSAMP and suicidal behaviour.

Methods

DNA was obtained from 288 male suicide victims and 327 healthy male volunteers. Thirty SNPs from LSAMP gene and adjacent region were selected by Tagger algorithm implemented in Haploview 3.32. Genotyping was performed using the SNPlex? (Applied Biosystems) platform. Data was analyzed by Genemapper 3.7, Haploview 3.32 and SPSS 13.0.

Results

Chi square test revealed four allelic variants (rs2918215, rs2918213, rs9874470 and rs4821129) located in the intronic region of the gene to be associated with suicide, major alleles being overrepresented in suicide group. However, the associations did not survive multiple correction test. Defining the haplotype blocks using confidence interval algorithm implemented in Haploview 3.32, we failed to detect any associated haplotypes.

Conclusion

Despite a considerable amount of investigation on the nature of suicidal behaviour, its aetiology and pathogenesis remain unknown. This study examined the variability in LSAMP gene in relation to completed suicide. Our results indicate that LSAMP might play a role in pathoaetiology of suicidal behaviour but further studies are needed to understand its exact contribution.     

ADAM33 基因rs2280090, rs487377, rs2787094 多态性与哮喘的相关性研究

目的:探讨ADAM33 基因多态性与青岛地区汉族成人哮喘的相关性。方法:采用SNaPshot 方法检测研究对象ADAM33 基因rs2280090、rs487377、rs2787094 共3 个位点的基因多态性。结果:rs2280090、rs487377 和rs2787094 基因型频率在哮喘组与对照组间差异无统计学意义(P>0.05)。结论:ADAM33 基因rs2280090、rs487377 和rs2787094 多态性与青岛地区汉族成人哮喘无相关关系。     

Association of ADAM33 polymorphisms with childhood asthma in a northern Chinese population

Background

Genetic factors contribute to the increasing incidence of childhood asthma. The ADAM33 (a disintegrin and metalloprotease domain-containing protein 33) gene, discovered through positional cloning, is the first to be associated with asthma and bronchial hyperresponsiveness. This case–control study conducted in a Han Chinese population in northern China compared the genotypes of child asthmatic patients to healthy controls for the presence of 6 single nucleotide polymorphisms (SNPs) in the ADAM33 gene.

Methods

The study population was composed of 412 children with asthma and 397 healthy controls. We genotyped 6 SNPs (F + 1, T + 1, T2, T1, V4, and Q-1) of ADAM33 with the PCR-restriction fragment length polymorphism (PCR-RFLP) method. Data were statistically analyzed to determine if an association existed between these genotypes and childhood asthma morbidity.

Results

Three SNPs (T + 1, T1, and V4) and 4 haplotypes (H1, H3, H5, and H8) were strongly associated with childhood asthma in children of northern China compared to healthy controls (P < 0.05), whereas the other tested SNPs and haplotypes demonstrated no significant relationship.

Conclusion

The ADAM33 gene plays an important role in facilitating susceptibility to childhood asthma in this Han Chinese population.     

Association of ADAM33 gene polymorphisms with COPD in a northeastern Chinese population

Background  

Chronic obstructive pulmonary disease (COPD) is influenced by both environmental and genetic factors. ADAM33 (a disintegrin and metalloproteinase 33) has been one of the most exciting candidate genes for asthma since its first association with the disease in Caucasian populations. Recently, ADAM33 was shown to be associated with excessive decline of lung function and COPD. The aim of this study was to evaluate the potential relationship between polymorphisms of ADAM33 and COPD in a Han population in northeastern China.     

Lack of association between ADAM33 gene and asthma in a Chinese population

Asthma is a complex polygenic disease with gene-environment interactions being important. It has been previously suggested that ADAM33, which is a member of a gene family that encodes membrane-anchored proteins with a disintegrin and a metalloprotease domain, is primarily expressed in lung fibroblasts and bronchial smooth muscle cells and has been associated with airway remodelling and bronchial hyperresponsiveness. A significant association has previously been demonstrated between single nucleotide polymorphisms (SNPs) and haplotypes of the ADAM33 and asthma in ethnically diverse populations. To assess whether SNPs or haplotypes of ADAM33 are related to asthma in a Chinese Han population, we genotyped three SNPs of ADAM33 (7575G/A in intron 6, 11188A/T in intron 19, and 12433T/C in exon 20) in a case-control study involving 296 patients with asthma and 270 healthy controls. No significant association was detected between these three SNPs and asthma susceptibility in the Chinese population.     

ADAM33: a newly identified gene in the pathogenesis of asthma

There is much to find out about this fascinating and complex molecule in relation to the development and progression of asthma. Added to it are three further new asthma/allergy genes identified by positional cloning: PDH Finger Protein II (PHF11) on chromosome 13q14, which encodes NY-REN-34 a protein first described in patients with renal cell carcinoma [67]; Dipeptidyl diptidase 10 (DDP10) on chromosome 2q14 [68]; and G protein-coupled receptor for asthma susceptibility (GPRA) on chromosome 7p [69]. For each of these genes, as is the case for ADAM33, determining their normal function(s) and how these become disordered in asthma is the future challenge.     

Association between ADAM33 polymorphisms and adult asthma in the Japanese population

Background ADAM33, a member of the ADAM (a disintegrin and metalloprotease) family, is a putative asthma susceptibility gene recently identified by positional cloning. It is important to know whether the association exists in ethnically diverse populations. Objective To assess whether genetic functional variants of ADAM33 relate to the susceptibility or some phenotypes in adult patients with bronchial asthma in a Japanese population. Methods We searched for single nucleotide polymorphisms (SNPs) in ADAM33 by PCR‐directed sequencing and identified 48 SNPs. Fourteen SNPs were selected with regard to the LD pattern, and genotyped by Taq‐Man and PCR–RFLP methods. We conducted an association study of ADAM33 with 504 adult asthmatic patients and 651 controls, and haplotype analyses of related variants were performed. Results Significant associations with asthma were found for the SNPs T1 (Met764Thr), T2 (Pro774Ser), S2 and V?3 (with the lowest P‐value for T1, P=0.0015; OR 0.63). We analysed the haplotype using these four polymorphisms, and found a positive association with haplotype CCTG (P=0.0024). Conclusion Our results replicate associations reported recently in other ethnic populations, and suggest that the ADAM33 gene is involved in the development of asthma through genetic polymorphisms.     

布地奈德降低哮喘小鼠肺中去整合素-金属蛋白酶33表达

去整合素-金属蛋白酶33(a disintegrin and metalloproteinase,ADAM33)与哮喘气道的损伤修复有着密切的关系。布地奈德(budesonide,BUD)是临床治疗哮喘应用较广泛的糖皮质激素,其能否通过干预ADAM33的表达来干预哮喘气道重塑,目前相关的报道较少。本研究观察BUD干预对慢性哮喘小鼠模型中肺组织ADAM33表达水平的影响,探讨其对小鼠哮喘气道重塑的干预作用。     

Association between ADAM33 T1 polymorphism and susceptibility to asthma in Asians

Objective

The aim of this study was to determine whether the ADAM33 (a disintegrin and metalloproteinase domain 33) T1 (rs2280091), T2 (rs2280090), and ST+7 (rs574174) polymorphisms confer susceptibility to asthma.

Methods

A meta-analysis stratified by ethnicity and age was conducted on associations between the ADAM33 T1, T2, and ST+7 polymorphisms and asthma.

Results

Eleven studies, which included 4,124 patients and 7,094 controls, were available for the meta-analysis. Meta-analysis revealed an association between asthma and the ADAM33 T1 GG genotype [odds ratio (OR)?=?2.257, 95?% confidence interval (CI)?=?1.577–3.228, p?=?8.42?×?10^?7]. Stratification by ethnicity indicated an association between this genotype and asthma in Asians (OR?=?2.683, 95?% CI?=?1.799–4.001, p?=?1.31?×?10^?7), and stratification by age indicated an association between it and asthma in adults (OR?=?1.895, 95?% CI?=?1.005–3.573, p?=?0.048). However, no association was found between asthma and the ADAM33 T2 and ST+7 polymorphisms.

Conclusions

This meta-analysis demonstrates that the ADAM33 T1 polymorphism confers susceptibility to asthma in Asians, but no association was found between the ADAM33 T2 and ST+7 polymorphisms and asthma susceptibility.     

ADAM33基因遗传多态性与支气管哮喘易感性关系的Meta分析

目的:综合评价解整合素金属蛋白酶33 (ADAM33)基因Met764Thr和Pro774Ser位点多态性与哮喘易感性的关系.方法:按照统一的检索策略,检索Pubmed、Ovid-Medline、CNKI及维普数据库中有关ADAM33基因多态性与哮喘易感性关系的病例-对照研究,按照纳入和排除标准选择文献提取相关信息,应用Review Manager 5.0软件进行Meta分析.结果:本研究纳入国内外14篇合格文献,其中Met764Thr位点12篇,共3 418例哮喘病例和3 520例对照;Pro774Ser位点8篇,共2 793例哮喘病例和3 207例对照.Meta分析结果显示,携带764位点Met/Thr或Thr/Thr突变基因型患哮喘的危险性是野生型的1.56倍(OR=1.56,95％CI=1.09～2.22),Pro774Ser位点突变基因型也与哮喘危险性升高有关(OR=1.39,95％CI=1.00～ 1.93).将人群分层后,该两个位点多态性与哮喘的关联均仅见于中国人群(764位点:OR=2.73,95％CI=1.79 ～4.17,774位点:OR =2.32,95％CI=1.30 ～4.15).结论:ADAM33基因764和774位点的突变与哮喘的易感性升高有关.     

T1 polymorphism in a disintegrin and metalloproteinase 33 (<Emphasis Type="Italic">ADAM33</Emphasis>) gene may contribute to the risk of childhood asthma in Asians

Objective

Polymorphisms in ADAM33 gene have been implicated in susceptibility to the risk of childhood asthma. However, the results remain controversial. We performed meta-analyses to clarify the relationship between them.

Methods

Relevant articles were searched in PubMed, Embase, Wanfang, and China National Knowledge Infrastructure. The Odds ratio (OR) with 95% confidence interval (CI) was used to assess the strength of the associations.

Results

Fourteen studies with five ADAM33 polymorphisms (F?+?1, T1, T2, S2, and V4) were identified, involving 2687 cases and 2996 controls. ADAM33 F?+?1, T2, and T1 polymorphisms showed significant associations with asthma risks in the overall and Caucasian children, Asian children, and Caucasian and Chinese children, respectively; however, these significant results were unstable in sensitivity analysis. T1 revealed significant and stable associations with asthma risks among Asian children in the dominant (OR?=?2.00, 95% CI?=?1.40–2.87, P?=?0.0002) and codominant (OR?=?3.06, 95% CI?=?1.71–5.50, P?=?0.0002) models; in cumulative meta-analyses, these significant results were robust. Concerning S2 or V4 polymorphism, no significant associations were observed.

Conclusion

These findings demonstrate that ADAM33 T1 polymorphism might be a potential susceptible predictor of asthma for Asian children. Further functional studies between this polymorphism and asthma risks are warranted.