Journal
ANNUAL REVIEW OF VISION SCIENCE, VOL 7, 2021
Volume 7, Issue -, Pages 665-692Publisher
ANNUAL REVIEWS
DOI: 10.1146/annurev-vision-100419-115156
Keywords
retina; metabolism; retinal pigment epithelium; photoreceptors
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Funding
- National Institutes of Health [EY06641, EY017863, EY026020]
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The outer retina is nourished by the choroid and energy metabolism studies have shown differences between retinas and RPE cells. The hypothesis suggests that the retina and RPE have complementary metabolic roles and depend on each other for survival and specialized functions.
The outer retina is nourished from the choroid, a capillary bed just inside the sclera. O-2, glucose, and other nutrients diffuse out of the choroid and then filter through a monolayer of retinal pigment epithelium (RPE) cells to fuel the retina. Recent studies of energy metabolism have revealed striking differences between retinas and RPE cells in the ways that they extract energy from fuels. The purpose of this review is to suggest and evaluate the hypothesis that the retina and RPE have complementary metabolic roles that make them depend on each other for survival and for their abilities to perform essential and specialized functions.
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