JOURNAL ARTICLE

FoxO1 gene confers genetic predisposition to acute anterior uveitis with ankylosing spondylitis

Hongsong Yu, Yunjia Liu, Lijun Zhang, Lili Wu, Minming Zheng, Ling Cheng, Le Luo, Aize Kijlstra, Peizeng Yang
Investigative Ophthalmology & Visual Science 2014 November 20, 55 (12): 7970-4
25414190

PURPOSE: Recent studies have shown that a decrease of regulatory T (Treg) cells may contribute to the activity of acute anterior uveitis (AAU) and ankylosing spondylitis (AS). A number of immunogenetic factors including IL2RA, miR-27a, miR-182, and FoxO1 are associated with Treg cell function. In this study, we investigated the association between polymorphisms of these genes and AAU with or without AS in a Chinese Han population.

METHODS: Using PCR-restricted fragment length polymorphism (RFLP) assay, a two-stage association study was performed in 680 AAU patients with or without AS and 1280 controls. Gene expression was quantified by real-time PCR.

RESULTS: In the first stage study, an association analysis of 10 single nucleotide polymorphisms (SNPs) was performed in 230 AAU patients with AS, 240 AAU patients without AS, and 650 controls. The results showed significantly increased frequencies of the FoxO1/rs2297626 AA genotype and A allele in AAU patients with AS (AA genotype: P = 6.23 × 10(-5), odds ratio [OR] = 1.86; A allele: P = 2.17 × 10(-4), OR = 1.53). No significant association of the other 9 SNPs with AAU with or without AS was observed. In the second stage study, an association analysis of FoxO1/rs2297626 was performed in 210 AAU patients with AS and 630 controls. The second stage and combined studies confirmed the association of FoxO1/rs2297626 with AAU with AS (AA genotype: P = 3.45 × 10(-8), OR = 1.85; A allele: P = 1.55 × 10(-7), OR = 1.55).

CONCLUSION: This study suggests that FoxO1, but not miR-27a, miR-182, and IL2RA, contributes to the genetic susceptibility of AAU with AS, but none of the tested polymorphisms confer risk to AAU without AS.

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