Int. J. Mol. Sci. 2013, 14(9), 19294-19308; doi:10.3390/ijms140919294
Review

Oxidative Stress in the Pathogenesis of Keratoconus and Fuchs Endothelial Corneal Dystrophy

Received: 12 May 2013; in revised form: 30 August 2013 / Accepted: 3 September 2013 / Published: 23 September 2013
(This article belongs to the Section Biochemistry, Molecular Biology and Biophysics)
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: Due to its localization and function, the cornea is regularly exposed to sunlight and atmospheric oxygen, mainly dioxygen, which produce reactive oxygen species (ROS). Therefore, corneal cells are particularly susceptible to oxidative stress. The accumulation of ROS in the cornea may affect signal transduction, proliferation and may also promote cell death. The cornea has several enzymatic and non-enzymatic antioxidants involved in ROS scavenging, but in certain conditions they may not cope with oxidative stress, leading to diseases of the eye. Keratoconus (KC) and Fuchs endothelial corneal dystrophy (FECD) are multifactorial diseases of the cornea, in which pathogenesis is not fully understood. However, increased levels of oxidative stress markers detected in these disorders indicate that oxidative stress may play an important role in their development and progression. These markers are: (i) decreased levels of non-enzymatic antioxidants, and (ii) decreased expression of genes encoding antioxidative enzymes, including thioredoxin reductase, peroxiredoxins, superoxide dismutase, glutathione S-transferase, and aldehyde dehydrogenase. Moreover, the FECD endothelium displays higher levels of oxidative DNA damage, especially in mitochondrial DNA (mtDNA), whereas KC cornea shows abnormal levels of some components of oxidative phosphorylation encoded by mtDNA. In this review we present some considerations and results of experiments supporting the thesis on the important role of oxidative stress in KC and FECD pathology.
Keywords: keratoconus; Fuchs endothelial corneal dystrophy; oxidative stress; antioxidants; free radicals
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MDPI and ACS Style

Wojcik, K.A.; Kaminska, A.; Blasiak, J.; Szaflik, J.; Szaflik, J.P. Oxidative Stress in the Pathogenesis of Keratoconus and Fuchs Endothelial Corneal Dystrophy. Int. J. Mol. Sci. 2013, 14, 19294-19308.

AMA Style

Wojcik KA, Kaminska A, Blasiak J, Szaflik J, Szaflik JP. Oxidative Stress in the Pathogenesis of Keratoconus and Fuchs Endothelial Corneal Dystrophy. International Journal of Molecular Sciences. 2013; 14(9):19294-19308.

Chicago/Turabian Style

Wojcik, Katarzyna A.; Kaminska, Anna; Blasiak, Janusz; Szaflik, Jerzy; Szaflik, Jacek P. 2013. "Oxidative Stress in the Pathogenesis of Keratoconus and Fuchs Endothelial Corneal Dystrophy." Int. J. Mol. Sci. 14, no. 9: 19294-19308.

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