Abstract:
:Known susceptibility loci together can only explain about 6-8% of the disease heritability of IgA nephropathy (IgAN), suggesting that there are still a large number of genetic variants remained to be discovered. We previously identified IgAN and systemic lupus erythematosus (SLE)/lupus nephritis (LN) shared many loci based on GWAS on Chinese populations. The more recent study with high-density genotyping of immune-related loci in individuals with Asian ancestry identified 10 new and 6 suggestive loci in SLE. In the current study, we thus included all the lead SNPs from these 16 loci reported, and firstly tested their associations in 1,248 patients with sporadic IgAN, 737 patients with LN and 1,187 controls. Significant associations identified in IgAN were replicated in additional 500 patients and 2372 controls. rs12022418 in RGS1 (p = 3.0 × 10-6) and rs7170151 in RASGRP1 (p = 1.9 × 10-5) showed novel associations in IgAN. Compared to SNPs that were in LD with them, the associated variants showed higher potential of regulatory features by affecting gene expression. And systemic evaluation of GWAS data supported the pleiotropic effects of RGS1 and RASGRP1 variants in mediating human complex diseases. In conclusion, novel risk loci shared between IgAN and SLE/LN were identified, which may shed new light to exploit the potential pathogenesis for those two diseases.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Zhou XJ,Nath SK,Qi YY,Sun C,Hou P,Zhang YM,Lv JC,Shi SF,Liu LJ,Chen R,Yang W,He KZ,Li Y,Zhang Hdoi
10.1038/srep35781subject
Has Abstractpub_date
2016-11-02 00:00:00pages
35781issn
2045-2322pii
srep35781journal_volume
6pub_type
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