A functional variant in ERAP1 predisposes to multiple sclerosis.

A functional variant in ERAP1 predisposes to multiple sclerosis.
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DOI:
10.1371/journal.pone.0029931
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Sironi M
Sironi M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Guerini FR;Cagliani R;Forni D;Agliardi C;Caputo D;Cassinotti A;Galimberti D;Fenoglio C;Biasin M;Asselta R;Scarpini E;Comi GP;Bresolin N;Clerici M;Sironi M

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ERAP 1基因编码参与抗原加工的氨肽酶。该基因的功能多态性(rs30187,Arg 528 Lys)与强直性脊柱炎(AS)的易感性相关,而相互作用的ERAP 2基因中的SNP增加了对另一种炎性自身免疫性疾病克罗恩病(CD)的易感性。我们分析了572例意大利CD患者和517例多发性硬化症(MS)患者的rs30187;对于每个队列,一个独立的性别和年龄匹配的对照组进行基因分型。与相应的对照人群相比,两个疾病队列中528 Arg等位基因的频率显著更高(对于CD,OR = 1.20,95%CI:1.01-1.43,p = 0.036;对于RRMS,OR = 1.26; 95%CI:1.04-1.51,p = 0.01)。        Wellcome Trust Cases Control Consortium GWAS数据的荟萃分析证实了与MS的相关性(pmeta = 0.005),但与CD无关。  在AS中,rs30187变体仅在HLA-B27等位基因背景中具有易感效应。ERAP 1和不同的HLA I类等位基因之间的相互作用是否也影响MS的易感性仍有待评估,并解释了未能提供rs30187在CD中的作用的明确证据。本文的结果支持了一个新兴的概念,即一个子集的主调控基因的自身免疫的发病机制。
The ERAP1 gene encodes an aminopeptidase involved in antigen processing. A functional polymorphism in the gene (rs30187, Arg528Lys) associates with susceptibility to ankylosying spondylitis (AS), whereas a SNP in the interacting ERAP2 gene increases susceptibility to another inflammatory autoimmune disorder, Crohn's disease (CD). We analysed rs30187 in 572 Italian patients with CD and in 517 subjects suffering from multiple sclerosis (MS); for each cohort, an independent sex- and age-matched control group was genotyped. The frequency of the 528Arg allele was significantly higher in both disease cohorts compared to the respective control population (for CD, OR = 1.20 95%CI: 1.01–1.43, p = 0.036; for RRMS, OR = 1.26; 95%CI: 1.04–1.51, p = 0.01). Meta-analysis with the Wellcome Trust Cases Control Consortium GWAS data confirmed the association with MS (pmeta = 0.005), but not with CD. In AS, the rs30187 variant has a predisposing effect only in an HLA-B27 allelic background. It remains to be evaluated whether interaction between ERAP1 and distinct HLA class I alleles also affects the predisposition to MS, and explains the failure to provide definitive evidence for a role of rs30187 in CD. Results herein support the emerging concept that a subset of master-regulatory genes underlay the pathogenesis of autoimmunity.
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