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Blue light exacerbates and red light counteracts negative insults to retinal ganglion cells in situ and R28 cells in vitro.

Abstract：

:Neurones are dependent on their mitochondria to produce the necessary amounts of ATP for survival. Retinal ganglion cells (RGCs) have a particularly large number of mitochondria which-unlike neurones in the brain-are exposed to visual light of 400-850 nm. Here we demonstrate that short wavelength visual blue light negatively affects mitochondrial function, causing oxidative stress and decreased cell survival. In contrast, long wavelength red light enhances mitochondrial function to increase survival of cultured R28 cells and reduce the effects of blue light. Induction of retinal ischemia for 60 min in dark conditions caused a reduction in ATP levels accompanied by decreased RGC numbers in all areas of the retina. These effects were diminished when ischemia was induced with concomitant delivery of red light, and exacerbated when blue light was used. We conclude that while the levels of blue light that reach the human retina will be a fraction of those used in the present study, the chronic nature might, on a theoretical basis, be detrimental to RGC mitochondria which are already affected by conditions such as glaucoma. Our findings also show that exposing the retina to red light may be a therapeutic approach to supporting healthy mitochondrial functions as part of the treatment for retinal diseases in which these organelles are affected.

journal_name

Neurochem Int

journal_title

Neurochemistry international

authors

Núñez-Álvarez C,Osborne NN

doi

10.1016/j.neuint.2019.02.018

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

187-196

eissn

0197-0186

issn

1872-9754

pii

S0197-0186(18)30627-2

journal_volume

125

pub_type

杂志文章

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