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BioMed Research International
Volume 2013 (2013), Article ID 247438, 9 pages
http://dx.doi.org/10.1155/2013/247438
Research Article

Polymorphism of the Transferrin Gene in Eye Diseases: Keratoconus and Fuchs Endothelial Corneal Dystrophy

1Department of Molecular Genetics, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland
2University of Málaga, Avenida Cervantes 2, 29071 Malaga, Spain
3Department of Ophthalmology, Medical University of Warsaw and Samodzielny Publiczny Kliniczny Szpital Okulistyczny, Sierakowskiego 13, 03-710 Warsaw, Poland

Received 1 July 2013; Revised 14 October 2013; Accepted 14 October 2013

Academic Editor: M. Ilyas Kamboh

Copyright © 2013 Katarzyna A. Wójcik et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Oxidative stress may play a role in the pathogenesis of keratoconus (KC) and Fuchs endothelial corneal dystrophy (FECD). Iron may promote the stress by the Fenton reaction, so its homeostasis should be strictly controlled. Transferrin is essential for iron homeostasis because it transports iron from plasma into cells. The malfunction of transferrin, which may be caused by variation in its gene (TF) variation, may contribute to oxidative stress and change KC and FECD risk. To verify this hypothesis we investigated the association between three polymorphisms of the TF gene, g.3296G>A (rs8177178), g.3481A>G (rs8177179), and c.–2G>A (rs1130459), and KC and FECD occurrence. Genotyping was performed in blood lymphocytes in 216 patients with KC, 130 patients with FECD and 228 controls by PCR-RFLP. We studied also the influence of other risk factors. The A/A genotype and the A allele of the g.3296G>A polymorphism were associated with KC occurrence, while the G allele was negatively correlated with it. We observed a decrease in KC occurrence associated with the A/G genotype of the g.3481A>G polymorphism. We did not find any association between the c.–2G>A polymorphism and KC. No association was found between all three polymorphisms and FECD occurrence.