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Biomarkers of oxidative stress in patients with wet age related macular degeneration

Abstract

Objective

The aim of this study was to analyze biomarkers of oxidative stress in patients with wet age related macular degeneration (AMD).

Participants and Measurements

Case-control study that includes 163 patients with wet AMD (age group of 55–82 years with the mean age of 71 years and 170 age-matched healthy controls in the age group of 55–78 years with the mean age of 71 years. The following parameters were determined: reduced and oxidized Glutathione (GSH/GSSH), protein carbonyl groups, total antioxidant activity in plasma and the activity of endogenous antioxidant enzymes, such as, gluthatione peroxidase, gluthatione reductase and superoxide dismutase.

Results

We observed total antioxidant activity higher in control group (CG) compared with patients with wet AMD (7.1 ± 1.2 μM Trolox vs 5.8 ± 1.1 μM Trolox). Values of superoxide dismutase activity (SOD), gluthatione reductase (GR) and gluthatione peroxidase (GPx) are higher in control group than in patients with wet AMD. According to the GSH/GSSH results, average values were higher in the CG than in patients with wet AMD and data were not significantly different.. Values of protein carbonyl groups were higher in patients with wet AMD than in CG and significant differences were found.

Conclusions

The finding of the present study suggests that the patients with wet AMD are an altered metabolic state of oxidation-reduction and that it is convenient to give therapeutic interventions with antioxidants. We have demonstrated that systematic oxidative stress, measured by different biomarkers is closely associated with the wet AMD.

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Correspondence to P. Zafrilla.

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Zafrilla, P., Losada, M., Perez, A. et al. Biomarkers of oxidative stress in patients with wet age related macular degeneration. J Nutr Health Aging 17, 219–222 (2013). https://doi.org/10.1007/s12603-012-0095-z

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  • DOI: https://doi.org/10.1007/s12603-012-0095-z

Key words

  • Protein carbonyl groups
  • GSH/GSSH
  • age related macular degeneration (ARMD)
  • antioxidant enzymes