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Background

Because immune responses are sensitive to environmental changes that drive selection of genetic variants, we hypothesized that polymorphisms of some xenobiotic response and immune response genes may be associated with specific types of immune-mediated diseases (IMD), while others may be associated with IMD as a larger category regardless of specific phenotype or ethnicity.

Objective

To examine transethnic gene-IMD associations for single nucleotide polymorphism (SNP) frequencies of prototypic xenobiotic response genes-aryl hydrocarbon receptor (AHR), AHR nuclear translocator (ARNT), AHR repressor (AHRR) - and a prototypic immune response gene, protein tyrosine phosphatase, non-receptor type 22 (PTPN22), in subjects from the Environmental Polymorphisms Registry (EPR).

Methods

Subjects (n = 3731) were genotyped for 14 SNPs associated with functional variants of the AHR, ARNT, AHRR, and PTPN22 genes, and their frequencies were compared among African Americans (n = 1562), Caucasians (n = 1838), and Hispanics (n = 331) with previously reported data. Of those genotyped, 2015 EPR subjects completed a Health and Exposure survey. SNPs were assessed via PLINK for associations with IMD, which included those with autoimmune diseases, allergic disorders, asthma, or idiopathic pulmonary fibrosis. Transethnic meta-analyses were performed using METAL and MANTRA approaches.

Results

ARNT SNP rs11204735 was significantly associated with autoimmune disease by transethnic meta-analyses using METAL (odds ratio, OR [95% confidence interval] = 1.29 [1.08-1.55]) and MANTRA (ORs ranged from 1.29 to 1.30), whereas ARNT SNP rs1889740 showed a significant association with autoimmune disease by METAL (OR = 1.25 [1.06-1.47]). For Caucasian females, PTPN22 SNP rs2476601 was significantly associated with autoimmune disease by allelic association tests (OR = 1.99, [1.30-3.04]). In Caucasians and Caucasian males, PTPN22 SNP rs3811021 was significantly associated with IMD (OR = 1.39 [1.12-1.72] and 1.50 [1.12-2.02], respectively) and allergic disease (OR = 1.39 [1.12-1.71], and 1.62 [1.19-2.20], respectively). In the transethnic meta-analysis, PTPN22 SNP rs3811021 was significantly implicated in IMD by METAL (OR = 1.31 [1.10-1.56]), and both METAL and MANTRA suggested that rs3811021 was associated with IMD and allergic disease in males across all three ethnic groups (IMD METAL OR = 1.50 [1.15-1.95]; IMD MANTRA ORs ranged from 1.47 to 1.50; allergic disease METAL OR = 1.58 [1.20-2.08]; allergic disease MANTRA ORs ranged from 1.55 to 1.59).

Conclusions

Some xenobiotic and immune response gene polymorphisms were shown here, for the first time, to have associations across a broad spectrum of IMD and ethnicities. Our findings also suggest a role for ARNT in the development of autoimmune diseases, implicating environmental factors metabolized by this pathway in pathogenesis. Further studies are needed to confirm these data, assess the implications of these findings, define gene-environment interactions, and explore the mechanisms leading to these increasingly prevalent disorders."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.org/dc/terms/identifier"doi:10.1016/j.jaut.2019.102363"xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/author"Xu H."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/author"McGrath J.A."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/author"Zeldin D.C."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/author"Bektas A."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/author"Gruzdev A."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/author"Miller F.W."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/author"O'Hanlon T.P."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/author"Garantziotis S."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/author"Schurman S.H."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/date"2020"xsd:gYear
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/name"J Autoimmun"xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/pages"102363"xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/title"Transethnic associations among immune-mediated diseases and single-nucleotide polymorphisms of the aryl hydrocarbon response gene ARNT and the PTPN22 immune regulatory gene."xsd:string
http://purl.uniprot.org/citations/31759816http://purl.uniprot.org/core/volume"107"xsd:string
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