Cited by 45Retinal Diseases and TreatmentsRetinal Development and DisordersComplement system in diseases

The Complement Regulatory Protein CD46 Deficient Mouse Spontaneously Develops Dry-Type Age-Related Macular Degeneration–Like Phenotype

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Lyzogubov, Valeriy V., Bora, Puran S., Wu, Xiaobo, Horn, Leah E., de Roque, Ryan, Rudolf, Xeniya V., Atkinson, John P., Bora, Nalini S.·2016·The American Journal of Pathology

Abstract

In the mouse, membrane cofactor protein (CD46), a key regulator of the alternative pathway of the complement system, is only expressed in the eye and on the inner acrosomal membrane of spermatozoa. We noted that although Cd46(-/-) mice have normal systemic alternative pathway activating ability, lack of CD46 leads to dysregulated complement activation in the eye, as evidenced by increased deposition of C5b-9 in the retinal pigment epithelium (RPE) and choroid. A knockout of CD46 induced the following cardinal features of human dry age-related macular degeneration (AMD) in 12-month-old male and female mice: accumulation of autofluorescent material in and hypertrophy of the RPE, dense deposits in and thickening of Bruch's membrane, loss of photoreceptors, cells in subretinal space, and a reduction of choroidal vessels. Collectively, our results demonstrate spontaneous age-related degenerative changes in the retina, RPE, and choroid of Cd46(-/-) mice that are consistent with human dry AMD. These findings provide the exciting possibility of using Cd46(-/-) mice as a convenient and reliable animal model for dry AMD. Having such a relatively straight-forward model for dry AMD should provide valuable insights into pathogenesis and a test model system for novel drug targets. More important, tissue-specific expression of CD46 gives the Cd46(-/-) mouse model of dry AMD a unique advantage over other mouse models using knockout strains.

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Crossref · 10.1016/j.ajpath.2016.03.021

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  • Inhibition of CD46 by gene knockout in mouse models led to increased VEGF production in the retina and choroid, increased MAC deposition on these tissues, increased susceptibility to laser-induced CNV, and degenerative changes in retinal tissues resembling an AMD phenotype.

    “In addition, the inhibition of CD46 by gene knockout in mouse models led to increased VEGF production in the retina and choroid, increased MAC deposition on these tissues, increased susceptibility to laser-induced CNV, and degenerative changes in retinal tissues resembling an AMD phenotype [166,167].”

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Research works printed but not linked: 1

  1. Morgan BP, Harris CL (Eds): Complement Regulatory Proteins. San Diego, London: Academic Press, 1999

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Authors
Lyzogubov, V. V., Bora, P. S., Wu, X., Horn, L. E., de Roque, R., Rudolf, X. V., Atkinson, J. P., & Bora, N. S.
Affiliations
  • University of Arkansas for Medical Sciences (US)
  • Washington University in St. Louis (US)
Corresponding author
Bora, Nalini S.
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2016-08
Volume
186
Issue
8
Pages
2088-2104
ISSN
0002-9440 (ISSN-L)
OpenAlex
W2415663312
Cited by
45
References
92
Citations by year
2026: 1 · 2025: 2 · 2024: 8 · 2023: 6 · 2021: 5 · 2020: 6 · 2019: 3 · 2018: 6 · 2017: 6 · 2016: 2
FWCI
6.02
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • The Edward N. and Della L. Thome Memorial Foundation
  • Lions of Arkansas Foundation, Inc.
  • Pat and Willard Walker Eye Research Center
  • Jones Eye Institute
Topics
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Life Sciences › Immunology and Microbiology › Immunology › Complement system in diseases
Keywords
CD46, membrane cofactor protein, dry age-related macular degeneration, complement regulation, alternative complement pathway, retinal pigment epithelium, choroid, C5b-9 deposition, Bruch's membrane, photoreceptor loss, choroidal vasculature, knockout mouse models, tissue-specific gene expression
MeSH terms
Animals, Disease Models, Animal, Female, Macular Degeneration, Male, Blotting, Western, Mice, Knockout, Mice, Membrane Cofactor Protein, Geographic Atrophy

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