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eQTL analysis links inflammatory bowel disease associated 1q21 locus to ECM1 gene [Elektronski vir]Repnik, Katja ; Potočnik, Uroš, 1969-Genome-wide association studies (GWAS) have been highly successful in inflammatory bowel disease (IBD) with 163 confirmed associations so far. We used expression quantitative trait loci (eQTL) ... mapping to analyze IBD associated regions for which causative gene from the region is still unknown. First, we performed an extensive literature search and in silico analysis of published GWAS in IBD and eQTL studies and extracted 402 IBD associated SNPs assigned to 208 candidate loci, and 9562 eQTL correlations. When crossing GWA and eQTL data we found that for 50 % of loci there is no eQTL gene, while for 31.2 % we can determine one gene, for 11.1 % two genes and for the remaining 7.7 % three or more genes. Based on that we selected loci with one, two, and three or more eQTL genes and analyzed them in peripheral blood lymphocytes and intestine tissue samples of 606 Slovene patients with IBD and in 449 controls. Association analysis of selected SNPs showed statistical significance for three (rs2631372 and rs1050152 on 5q locus and rs13294 on 1q locus) out of six selected SNPs with at least one phenotype. Furthermore, with eQTL analysis of selected chromosomal regions, we confirmed a link between SNP and gene for four (SLC22A5 on 5q, ECM1 on 1q, ORMDL3 on 17q, and PUS10 on 2p locus) out of five selected regions. For 1q21 loci, we confirmed gene ECM1 as the most plausible gene from this region to be involved in pathogenesis of IBD and thereby contributed new eQTL correlation from this genomic region.Source: Journal of applied genetics [Elektronski vir]. - ISSN 2190-3883 (Vol. 57, iss. 3, 2016, str. 363-372)Type of material - e-articlePublish date - 2016Language - englishCOBISS.SI-ID - 512573240
Author
Repnik, Katja |
Potočnik, Uroš, 1969-
Topics
Inflammatory bowel disease |
genetics
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Repnik, Katja | 28417 |
Potočnik, Uroš, 1969- | 16340 |
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