Cited by 188Retinal Development and DisordersRetinal Diseases and TreatmentsRetinoids in leukemia and cellular processes

Accelerated Accumulation of Lipofuscin Pigments in the RPE of a Mouse Model for ABCA4-Mediated Retinal Dystrophies following Vitamin A Supplementation

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Radu, Roxana A., Yuan, Quan, Hu, Jane, Peng, Jennifer H., Lloyd, Marcia, Nusinowitz, Steven, Bok, Dean, Travis, Gabriel H.·2008·Investigative Opthalmology & Visual Science

Abstract

PURPOSE: Dietary supplementation with vitamin A is sometimes prescribed as a treatment for retinitis pigmentosa, a group of inherited retinal degenerations that cause progressive blindness. Loss-of-function mutations in the ABCA4 gene are responsible for a subset of recessive retinitis pigmentosa. Other mutant alleles of ABCA4 cause the related diseases, recessive cone-rod dystrophy, and recessive Stargardt macular degeneration. Mice with a knockout mutation in the abca4 gene massively accumulate toxic lipofuscin pigments in the retinal pigment epithelium. Treatment of these mice with fenretinide, an inhibitor of vitamin A delivery to the eye, blocks formation of these toxic pigments. Here the authors tested the hypothesis that dietary supplementation with vitamin A may accelerate lipofuscin pigment formation in abca4(-/-) mice. METHODS: Wild-type and abca4(-/-) mice were fed normal or vitamin A-supplemented diets. Tissues from these mice were analyzed biochemically for retinoids and lipofuscin pigments. Eyes from these mice were analyzed morphologically for lipofuscin in the retinal pigment epithelium and for degeneration of photoreceptors. Visual function in these mice was analyzed by electroretinography. RESULTS: Mice that received vitamin A supplementation had dramatically higher levels of retinyl esters in the liver and retinal pigment epithelium. Lipofuscin pigments were significantly increased by biochemical and morphologic analysis in wild-type and abca4(-/-) mice fed the vitamin A-supplemented diet. Photoreceptor degeneration was observed in 11-month-old albino, but not pigmented, abca4(-/-) mice on both diets. CONCLUSIONS: Vitamin A supplementation should be avoided in patients with ABCA4 mutations or other retinal or macular dystrophies associated with lipofuscin accumulation in the retinal pigment epithelium.

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Crossref · 10.1167/iovs.07-1470

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  • High vitamin A intake is a risk factor for progression of ABCA4-retinopathy.

    “According to dietary questionnaire studies and animal model studies, high vitamin A intake is thought to be a risk factor for the progression [76,98], therefore patients are discouraged from taking vitamin A supplements.”

    From The Role of Vitamin A in Retinal Diseases (2022) · cites this paper as [98]

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Authors
Radu, R. A., Yuan, Q., Hu, J., Peng, J. H., Lloyd, M., Nusinowitz, S., Bok, D., & Travis, G. H.
Affiliations
  • From the Departments of Ophthalmology,
  • University of California, Los Angeles (US)
Venue
Investigative Opthalmology & Visual Science
Published
2008-09-01
Volume
49
Issue
9
Pages
3821
ISSN
  • 0146-0404 (ISSN-L)
  • 1552-5783
OpenAlex
W1985247086
Cited by
188
References
56
Citations by year
2026: 11 · 2025: 11 · 2024: 5 · 2023: 7 · 2022: 13 · 2021: 12 · 2020: 6 · 2019: 8 · 2018: 13 · 2017: 6 · 2016: 11 · 2015: 13 · 2014: 11 · 2013: 13 · 2012: 11
FWCI
5.08
Type
journal article
Language
en
Open access
Locations
  • Investigative Ophthalmology & Visual Science (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Eye Institute (R01EY011713)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinoids in leukemia and cellular processes
Keywords
lipofuscin accumulation, ABCA4, retinitis pigmentosa, vitamin A supplementation, retinal pigment epithelium, retinoids, photoreceptor degeneration, fenretinide, cone-rod dystrophy, retinal degeneration, electroretinogram
MeSH terms
Animals, Disease Models, Animal, Electroretinography, Lipofuscin, Liver, Mice, Inbred BALB C, Mice, Inbred Strains, Pigment Epithelium of Eye, Retina, Retinal Degeneration, Vitamin A, Mice, Knockout, ATP-Binding Cassette Transporters, Dietary Supplements, Spectrometry, Mass, Electrospray Ionization, Mice

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