Genome-wide meta-analysis in alopecia areata resolves HLA associations and reveals two new susceptibility loci.

Genome-wide meta-analysis in alopecia areata resolves HLA associations and reveals two new susceptibility loci.
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DOI:
10.1038/ncomms6966
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发表时间:
2015-01-22
影响因子:
16.6
通讯作者:
Christiano AM
Christiano AM
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Betz RC;Petukhova L;Ripke S;Huang H;Menelaou A;Redler S;Becker T;Heilmann S;Yamany T;Duvic M;Hordinsky M;Norris D;Price VH;Mackay-Wiggan J;de Jong A;DeStefano GM;Moebus S;Böhm M;Blume-Peytavi U;Wolff H;Lutz G;Kruse R;Bian L;Amos CI;Lee A;Gregersen PK;Blaumeiser B;Altshuler D;Clynes R;de Bakker PIW;Nöthen MM;Daly MJ;Christiano AM

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斑秃(Alopecia areata,AA)是一种常见的自身免疫性疾病,有10个已知的易感基因位点。在这里,我们通过结合来自两个全基因组关联研究(GWAS)的数据,以及对总共3,253例病例和7,543例对照的补充免疫芯片数据的复制,对AA进行了第一次荟萃分析。最强的关联区域是MHC,在那里我们精细绘制了4个独立的效应,所有这些都暗示HLA-DR是关键的病因驱动因素。在MHC之外,我们确定了两个超过统计学显著性的新位点,包括ACOXL/BCL 2L 11(BIM)(2 q13); GARP(LRRC 32)(11q13.5),以及第三个名义上显著的区域SH 2B 3(LNK)/ATXN 2(12q24.12)。在这些区域中的候选易感基因表达分析表明在相关免疫细胞和毛囊中表达。我们将我们的结果与其他七种自身免疫性疾病的数据相结合,并提供了对这些疾病中AA对齐的见解。我们的研究结果揭示了AA中被破坏的新分子途径,包括自噬/细胞凋亡、TGF β/Tregs和JAK激酶信号传导,并支持异常免疫过程在AA中的因果作用。
Alopecia areata (AA) is a prevalent autoimmune disease with ten known susceptibility loci. Here we perform the first meta-analysis in AA by combining data from two genome-wide association studies (GWAS), and replication with supplemented ImmunoChip data for a total of 3,253 cases and 7,543 controls. The strongest region of association is the MHC, where we fine-map 4 independent effects, all implicating HLA-DR as a key etiologic driver. Outside the MHC, we identify two novel loci that exceed statistical significance, containing ACOXL/BCL2L11(BIM) (2q13); GARP (LRRC32) (11q13.5), as well as a third nominally significant region SH2B3(LNK)/ATXN2 (12q24.12). Candidate susceptibility gene expression analysis in these regions demonstrates expression in relevant immune cells and the hair follicle. We integrate our results with data from seven other autoimmune diseases and provide insight into the alignment of AA within these disorders. Our findings uncover new molecular pathways disrupted in AA, including autophagy/apoptosis, TGFß/Tregs and JAK kinase signaling, and support the causal role of aberrant immune processes in AA.
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