A2E and blue light in the retina

The paradigm of age-related macular degeneration

Hamdy Shaban, Christoph Richter

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

The photoreceptors in the retina, designed to initiate the cascade of events which link the incoming light to the sensation of 'vision', are susceptible to damage by light, particularly blue light. The damage can lead to cell death and diseases. The turnover of retinal, an essential element of the visual process, is the basis of the events that lead to damage. Free retinal, absorbing in the blue region of the visible spectrum, is phototoxic, and is a precursor of the (photo)toxic compound A2E, which specifically targets cytochrome oxidase and thereby induces cell death by apoptosis. Cell death induced by A2E in the dark is prevented by negatively charged phospholipids. The blue light-filtering molecules lutein and zeaxanthin are tailor-made substances protecting the retina. In vitro, they protect cytochrome oxidase against the permanent damage caused by A2E in combination with light. These novel findings should enable us to prevent or cure the dry form of age-related macular degeneration, the leading cause of severe visual impairment in humans living in developed countries.

Original languageEnglish
Pages (from-to)537-545
Number of pages9
JournalBiological Chemistry
Volume383
Issue number3-4
DOIs
Publication statusPublished - 2002
Externally publishedYes

Fingerprint

Macular Degeneration
Retina
Light
Cell death
Cell Death
Electron Transport Complex IV
Lutein
Poisons
Vision Disorders
Developed Countries
Telecommunication links
Phospholipids
Apoptosis
Molecules

Keywords

  • A2E
  • Antioxidants
  • Apoptosis
  • Carotenoids
  • Mitochondria
  • Retinoids

ASJC Scopus subject areas

  • Biochemistry

Cite this

A2E and blue light in the retina : The paradigm of age-related macular degeneration. / Shaban, Hamdy; Richter, Christoph.

In: Biological Chemistry, Vol. 383, No. 3-4, 2002, p. 537-545.

Research output: Contribution to journalArticle

Shaban, Hamdy ; Richter, Christoph. / A2E and blue light in the retina : The paradigm of age-related macular degeneration. In: Biological Chemistry. 2002 ; Vol. 383, No. 3-4. pp. 537-545.
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