Cited by 47Retinal Development and DisordersOcular Disorders and TreatmentsRetinoids in leukemia and cellular processes

Early retinoic acid deprivation in developing zebrafish results in microphthalmia

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LE, HONG-GAM T., DOWLING, JOHN E., CAMERON, D. JOSHUA·2012·Visual Neuroscience

Abstract

Vitamin A deficiency causes impaired vision and blindness in millions of children around the world. Previous studies in zebrafish have demonstrated that retinoic acid (RA), the acid form of vitamin A, plays a vital role in early eye development. The objective of this study was to describe the effects of early RA deficiency by treating zebrafish with diethylaminobenzaldehyde (DEAB), a potent inhibitor of the enzyme retinaldehyde dehydrogenase (RALDH) that converts retinal to RA. Zebrafish embryos were treated for 2 h beginning at 9 h postfertilization. Gross morphology and retinal development were examined at regular intervals for 5 days after treatment. The optokinetic reflex (OKR) test, visual background adaptation (VBA) test, and the electroretinogram (ERG) were performed to assess visual function and behavior. Early treatment of zebrafish embryos with 100 μM DEAB (9 h) resulted in reduced eye size, and this microphthalmia persisted through larval development. Retinal histology revealed that DEAB eyes had significant developmental abnormalities but had relatively normal retinal lamination by 5.5 days postfertilization. However, the fish showed neither an OKR nor a VBA response. Further, the retina did not respond to light as measured by the ERG. We conclude that early deficiency of RA during eye development causes microphthalmia as well as other visual defects, and that timing of the RA deficiency is critical to the developmental outcome.

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  1. Biehlmaier O Lampert JM von Lintig J Kohler K 2005b Photoreceptor morphology is severely affected in the beta, beta-carotene-15,15 ′-oxygenase (bcox) zebrafish morphant European Journal of Neuroscience 21 59 68 15654843

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Authors
LE, H.-G. T., DOWLING, J. E., & CAMERON, D. J.
Affiliations
Harvard University (US)
Corresponding author
CAMERON, D. JOSHUA
Venue
Visual Neuroscience
Published
2012-09
Volume
29
Issue
4-5
Pages
219-228
ISSN
  • 0952-5238 (ISSN-L)
  • 1469-8714
OpenAlex
W2144411483
Cited by
46
References
46
Citations by year
2026: 1 · 2025: 7 · 2024: 3 · 2023: 2 · 2022: 4 · 2021: 8 · 2020: 2 · 2019: 4 · 2018: 1 · 2017: 1 · 2015: 7 · 2014: 3 · 2013: 3
FWCI
1.67
Type
journal article
Language
en
Open access
Locations
  • Visual Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Western University of Health Sciences
  • National Institutes of Health
  • National Eye Institute (T32 EY 07145, R01EY000811, EY000811, T32EY007145)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Ocular Disorders and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinoids in leukemia and cellular processes
Keywords
microphthalmia, zebrafish eye development, vitamin A deficiency, visual function, optokinetic response, electroretinogram, retinal lamination
MeSH terms
Adaptation, Ocular, Animals, Behavior, Animal, Electroretinography, Embryo, Nonmammalian, Eye, Larva, Microphthalmos, p-Aminoazobenzene, Phenotype, Reflex, Tretinoin, Vitamin A Deficiency, Zebrafish, Nystagmus, Optokinetic

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