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Biochemistry (Moscow)

, Volume 75, Issue 2, pp 130–138 | Cite as

Lipofuscin granule dynamics during development of age-related macular degeneration

  • V. B. Saprunova
  • D. I. Pilipenko
  • A. V. Alexeevsky
  • A. Zh. Fursova
  • N. G. Kolosova
  • L. E. BakeevaEmail author
Article

Abstract

The pigment epithelium cell structure and therapeutic effect of antioxidant SkQ1, selectively penetrating into mitochondria from eye drops, were studied upon development in OXYS rats of age-related retinopathy as a model of macular degeneration. The characteristic dynamics and ultrastructural peculiarities of the layer of electron-dense cytoplasmic structures of the pigment epithelium apex part and incorporated lipofuscin granules were revealed. The therapy of OXYS animals for 68 days using 250 nM SkQ1 drops decreased the extent of development of age-related macular degeneration. Electron-microscopic investigation showed that SkQ1 prevented development of ultrastructural changes in the pigment epithelium characteristic of macular degeneration, the condition of which after therapy with SkQ1 drops corresponded to ultrastructure of pigment epithelium in Wistar rats of the same age having no symptoms of retinal damage. It is supposed that ultrastructural changes in the electron-dense layer upon development of age-related macular degeneration are indicative of disturbances in the optical cycle functioning, especially of disturbances in functioning of photoreceptor membranes.

Key words

electron microscopy age dependent macular degeneration pigment epithelium mitochondria lipofuscin granules oxidative stress SkQ1 

Abbreviations

A2E

N-retinol-N-retinylidene ethanolamine

ROS

reactive oxygen species

SkQ1

10-(6′-plastoquinoyl)decyltriphenyl phosphonium

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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • V. B. Saprunova
    • 1
    • 2
  • D. I. Pilipenko
    • 1
    • 2
  • A. V. Alexeevsky
    • 1
  • A. Zh. Fursova
    • 3
  • N. G. Kolosova
    • 3
  • L. E. Bakeeva
    • 1
    • 2
    Email author
  1. 1.Belozersky Institute of Physico-Chemical BiologyLomonosov Moscow State UniversityMoscowRussia
  2. 2.Mitoengineering CenterLomonosov Moscow State UniversityMoscowRussia
  3. 3.Institute of Cytology and GeneticsSiberian Branch of the Russian Academy of SciencesNovosibirskRussia

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