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The rs6060566 of the reactive oxygen species modulator 1 ( R omo‐1) gene affects R omo‐1 expression and the development of diabetic retinopathy in C aucasians with type 2 diabetes

2015; Wiley; Volume: 93; Issue: 8 Linguagem: Inglês

10.1111/aos.12723

1755-3768

Mojca Globočnik Petrovič, Peter Kružliak, Daniel Petrovič,

Glaucoma and retinal disorders

Abstract Purpose The aim of this study was to examine the role of the rs6060566 polymorphism of the reactive oxygen species modulator 1 (Romo‐1) gene in the development of diabetic retinopathy ( DR ) in Caucasians with type 2 diabetes (T2 DM ). Moreover, another aim was to investigate the effect of Romo‐1 genotypes on Romo‐1 expression in fibrovascular membranes from patients with proliferative DR . Methods A total of 806 subjects with T2 DM were enrolled in cross‐sectional case–control study: 278 patients with DR and 528 subjects without clinical signs of DR . Genetical analysis was performed in 806 subjects with T2 DM . Moreover, immunohistochemical analysis of 40 fibrovascular membranes of patients with proliferative DR was performed. The number of positive (labelled) cells per area – numerical areal density of the Romo‐1‐positive cells (the number of positive cells/mm 2 ) – was calculated. Results A significantly higher frequency of the CC genotype of the rs6060566 polymorphism of the Romo‐1 gene was found in subjects with T2 DM with DR compared to those without DR (odds ratio=3.3, 95% confidence interval=1.1–8.8; p = 0.024). Moreover, the Romo‐1 C allele was found to effect Romo‐1 expression in fibrovascular membranes of patients with proliferative DR . Conclusions The rs6060566 polymorphism of the Romo‐1 gene was found to be an independent risk factor for DR in Caucasians with T2 DM . Moreover, the rs6060566 is most probably functional and its effect might be mediated through the increased expression of Romo‐1 in the retina.