Cited by 203Retinal Development and DisordersRetinal Diseases and TreatmentsOcular Disorders and Treatments

Excess cone cell proliferation due to lack of a functional NR2E3 causes retinal dysplasia and degeneration in rd7/rd7 mice

Haider, N. B.·2001·Human Molecular Genetics

Abstract

The rd7 mouse is a model for hereditary retinal degeneration characterized clinically by retinal spotting throughout the fundus and late onset retinal degeneration, and histologically by retinal dysplasia manifesting as folds and whorls in the photoreceptor layer. This study demonstrates that the rd7 phenotype results from a splicing error created by a genomic deletion of an intron and part of an exon. Hematoxylin/eosin staining of rd7 tissue shows that the whorls in the outer nuclear layer of the retina do not appear during embryonic development but manifest by postnatal day 12.5 (P12.5). Furthermore, in situ hybridization data indicates that the Nr2e3 message is first present at barely discernable levels at embryonic day 18.5, becomes abundant by P2.5, and reaches maximal adult levels by P10.5. Results from these experiments indicate that Nr2e3 message is expressed prior to the development of S-cones. This data coincides with studies in humans showing that mutations in Nr2e3 result in a unique type of retinal degeneration known as enhanced S-cone syndrome, where patients have a 30-fold increase in S-cone sensitivity compared to normal. Immunohistochemical staining of cone cells demonstrates that rd7 retinas have an increased number of cone cells compared to wild-type retinas. Thus, Nr2e3 may function by regulating genes involved in cone cell proliferation, and mutations in this gene lead to retinal dysplasia and degeneration by disrupting normal photoreceptor cell topography as well as cell-cell interactions.

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Crossref · 10.1093/hmg/10.16.1619

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  • Nr2e3rd7 mice have additional retinal vascular attenuation and mottled retinal pigmentation at 16 months of age.

    “There is additional retinal vascular attenuation and mottled retinal pigmentation at 16 months of age”
  • Nr2e3 is part of the cellular and nuclear receptor family for steroid hormones and is involved in cone cell proliferation, maintenance of photoreceptor topography and intercellular interactions, and expression of rod photoreceptor cell-specific genes.

    “Nr2e3 is part of the cellular and nuclear receptor family for steroid hormones and is involved in cone cell proliferation, maintenance of photoreceptor topography and intercellular interactions, and expression of rod photoreceptor cell-specific genes”

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Authors
Haider, N. B.
Affiliations
Jackson Laboratory (US)
Corresponding author
Haider, N. B.
Venue
Human Molecular Genetics
Published
2001-08-01
Volume
10
Issue
16
Pages
1619-1626
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2157773282
Cited by
202
References
29
Citations by year
2026: 5 · 2025: 10 · 2024: 4 · 2023: 4 · 2022: 3 · 2021: 6 · 2020: 7 · 2019: 5 · 2018: 3 · 2017: 9 · 2016: 6 · 2015: 8 · 2014: 5 · 2013: 8 · 2012: 11
FWCI
3.15
Type
journal article
Language
en
Open access
closed
Locations
  • Human Molecular Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • The Mouseion at the JAXlibrary (Jackson Laboratory) (submittedVersion)
Funders
  • National Institutes of Health (NRSA T32)
  • National Eye Institute (EY 11996, R01EY011996)
  • National Cancer Institute (#CA34196, P30CA034196)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (T32 HD07065-21, T32HD007065)
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 › Genetics › Ocular Disorders and Treatments
Keywords
NR2E3, retinal degeneration, retinal dysplasia, S-cone photoreceptors, intron deletion, splicing errors, enhanced S-cone syndrome
MeSH terms
Animals, Cell Count, Cell Differentiation, Cell Division, Female, Fundus Oculi, Genotype, Humans, Immunohistochemistry, Male, Mice, Inbred C57BL, Mutation, Phenotype, Retina, Retinal Degeneration, Transcription Factors, Retinal Dysplasia, Retinal Cone Photoreceptor Cells, Receptors, Cytoplasmic and Nuclear, Gene Expression Profiling, Mice, Orphan Nuclear Receptors

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