Genetic association of miRNA-146a with systemic lupus erythematosus in Europeans through decreased expression of the gene.
Genetic association of miRNA-146a with systemic lupus erythematosus in Europeans through decreased expression of the gene.
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DOI:
10.1038/gene.2011.84
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发表时间:
2012-04
影响因子:
5
通讯作者:
Alarcón-Riquelme ME
中科院分区:
文献类型:
--
作者:
Löfgren SE;Frostegård J;Truedsson L;Pons-Estel BA;D'Alfonso S;Witte T;Lauwerys BR;Endreffy E;Kovács L;Vasconcelos C;Martins da Silva B;Kozyrev SV;Alarcón-Riquelme ME
A recent genome-wide association study revealed a variant (rs2431697) in an intergenic region, between the PTTG1 and microRNA (miR-146a) genes, associated with SLE susceptibility. Here, we analyzed with a case-control design this variant and other candidate polymorphisms in this region together with expression analysis in order to clarify to which gene this association is related. The SNPs rs2431697, rs2910164 and rs2277920 were genotyped by TaqMan assays in 1324 SLE patients and 1453 healthy controls of European ancestry. Genetic association was statistically analyzed using Unphased. Gene expression of PTTG1, the miRNAs miR-3142 and primary and mature form of miR-146a in PBMCs were assessed by quantitative real-time PCR. Of the three variants analyzed only rs2431697 was genetically associated with SLE in Europeans. Gene expression analysis revealed that this SNP was not associated with PTTG1 expression levels, but with the microRNA-146a, where the risk allele correlates with lower expression of the miRNA. We replicated the genetic association of rs2341697 with SLE in a case-control study in Europeans and demonstrated that the risk allele of this SNP correlates with a downregulation of the miRNA 146a, potentially important in SLE etiology.
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作者:
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通讯作者:
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DOI:
10.1073/pnas.0802682105
发表时间:
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通讯作者:
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