Antioxidants rescue photoreceptors in rd1 mice: Relationship with thiol metabolism

Research output: Contribution to journalArticle

Abstract

We have previously shown that the use of a combination of antioxidants delayed the degeneration process in rd1 mouse retina. In an effort to understand the mechanism of action of these substances (zeaxanthin, lutein, alpha-lipoic acid, glutathione, and Lycium barbarum extract) the changes in the levels of several proteins and oxidative stress markers in the rd1 retina have been studied. The treatment increased glutathione peroxidase activity and glutathione levels and decreased cystine concentrations in rd1 retinas. Considering all the results obtained from treated and untreated animals, a high correlation was present between glutathione concentration and glutathione peroxidase activity, and there was a negative correlation between glutathione retinal concentration and number of TUNEL-positive cells. No difference was observed between the numbers of nNOS- and NADPH-diaphorase-positive cells in treated and untreated rd1 mice. Thiol contents and thiol-dependent peroxide metabolism seem to be directly related to the survival of photoreceptors in rd1 mouse retina. (C) 2009 Elsevier Inc. All rights reserved.

Details

Authors
  • Maria Miranda
  • Emma Arnal
  • Satpal Ahuja
  • Raquel Alvarez-Nolting
  • Rosa Lopez-Pedrajas
  • Per Ekström
  • Francisco Bosch-Morell
  • Theo van Veen
  • Francisco J. Romero
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Biochemistry and Molecular Biology

Keywords

  • radicals, Free, Nitric oxide, Glutathione, Antioxidants, Retina, Photoreceptors
Original languageEnglish
Pages (from-to)216-222
JournalFree Radical Biology & Medicine
Volume48
Issue number2
Publication statusPublished - 2010
Publication categoryResearch
Peer-reviewedYes