Cited by 89Retinal Diseases and TreatmentsRetinal Development and DisordersFatty Acid Research and Health

Retinal pigment epithelial cells play a central role in the conservation of docosahexaenoic acid by photoreceptor cells after shedding and phagocytosis

Gordon, William C., de Turco, Elena B. Rodriguez, Bazan, Nicolas G.·1992·Current Eye Research

Abstract

The involvement of retinal pigment epithelial (RPE) cells in the recycling of docosahexaenoic acid (DHA), from phagocytized disc membranes back to the retina, was studied in frogs subsequent to injection of [3H]DHA via the dorsal lymph sac. Rod outer segments (ROS) gradually accumulated [3H]DHA as a dense, heavily labeled region that arrived at the distal tips by 28 days post-injection. Autoradiographic analysis at the time of maximal shedding and phagocytosis (1-2 hr after the onset of light) showed diffusely (before 28 days) and heavily (after 28 days) labeled phagosomes in RPE cells. Biochemical analysis of the [3H]DHA-containing lipids of discs that contribute to the labeling of RPE cells after phagocytosis was also performed. Between 27 and 34 days, when 12% of retinal [3H]DHA-lipids present in disc membranes are phagocytized by RPE cells, total retinal labeling remained unchanged. Taken together, these data suggest that the [3H]DHA of the densely labeled region of the ROS was recycled back to the photoreceptor cells only after it had reached the RPE cells following 28 days post-injection. We conclude that, following daily phagocytosis of ROS tips, RPE cells play a central role in the conservation and redelivery of ROS-derived DHA back to photoreceptor cells through the interphotoreceptor matrix.

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Crossref · 10.3109/02713689209069169

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24 of 24 references verified0 citation errors · 0 not checkable

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  • RPE cells play a central role in the conservation and delivery of rod outer segment-derived DHA back to PRCs through the interphotoreceptor matrix following daily phagocytosis of ROS tips.

    “By participating in the recycling of DHA, from phagocytized disc membranes back to the retina, RPE cells play a central role in the conservation and delivery of rod outer segment (ROS)-derived DHA back to PRCs through the interphotoreceptor matrix following daily phagocytosis of ROS tips (Gordon et al., 1992).”

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Authors
Gordon, W. C., de Turco, E. B. R., & Bazan, N. G.
Affiliations
Louisiana State University (US)
Venue
Current Eye Research
Published
1992-01
Volume
11
Issue
1
Pages
73-83
ISSN
  • 0271-3683 (ISSN-L)
  • 1460-2202
OpenAlex
W1993464867
Cited by
89
References
24
Citations by year
2026: 2 · 2025: 1 · 2024: 4 · 2023: 4 · 2022: 4 · 2021: 3 · 2020: 4 · 2019: 2 · 2018: 1 · 2017: 3 · 2016: 1 · 2015: 2 · 2013: 2 · 2012: 3
FWCI
6.98
Type
journal article
Language
en
Open access
closed
Locations
  • Current Eye Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01ey004428-07)
  • National Eye Institute (EY-02377, EY04428, P30EY002377)
Topics
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
Keywords
retinal pigment epithelium, docosahexaenoic acid, phagocytosis, fatty acid recycling, rod outer segments, interphotoreceptor matrix, frog retina, fatty acid metabolism
MeSH terms
Animals, Autoradiography, Docosahexaenoic Acids, Phagocytosis, Phagosomes, Phospholipids, Photoreceptor Cells, Pigment Epithelium of Eye, Rana pipiens, Rod Cell Outer Segment

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