Cited by 78Retinal Diseases and TreatmentsComplement system in diseasesRetinal Development and Disorders

A local complement response by RPE causes early-stage macular degeneration

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Fernandez-Godino, Rosario, Garland, Donita L., Pierce, Eric A.·2015·Human Molecular Genetics

Abstract

Inherited and age-related macular degenerations (AMDs) are important causes of vision loss. An early hallmark of these disorders is the formation of sub-retinal pigment epithelium (RPE) basal deposits. A role for the complement system in MDs was suggested by genetic association studies, but direct functional connections between alterations in the complement system and the pathogenesis of MD remain to be defined. We used primary RPE cells from a mouse model of inherited MD due to a p.R345W mutation in EGF-containing fibulin-like extracellular matrix protein 1 (EFEMP1) to investigate the role of the RPE in early MD pathogenesis. Efemp1(R345W) RPE cells recapitulate the basal deposit formation observed in vivo by producing sub-RPE deposits in vitro. The deposits share features with basal deposits, and their formation was mediated by EFEMP1(R345W) or complement component 3a (C3a), but not by complement component 5a (C5a). Increased activation of complement appears to occur in response to an abnormal extracellular matrix (ECM), generated by the mutant EFEMP1(R345W) protein and reduced ECM turnover due to inhibition of matrix metalloproteinase 2 by EFEMP1(R345W) and C3a. Increased production of C3a also stimulated the release of cytokines such as interleukin (IL)-6 and IL-1B, which appear to have a role in deposit formation, albeit downstream of C3a. These studies provide the first direct indication that complement components produced locally by the RPE are involved in the formation of basal deposits. Furthermore, these results suggest that C3a generated by RPE is a potential therapeutic target for the treatment of EFEMP1-associated MD as well as AMD.

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  1. Monet-Lepretre, M., Haddad, I., Baron-Menguy, C., Fouillot- Panchal, M., Riani, M., Domenga-Denier, V., Dussaule, C., Human Molecular Genetics, 2015, Vol. 24, No. 19 | 5567

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Authors
Fernandez-Godino, R., Garland, D. L., & Pierce, E. A.
Affiliations
Massachusetts Eye and Ear Infirmary (US)
Corresponding author
Pierce, Eric A.
Venue
Human Molecular Genetics
Published
2015-07-21
Volume
24
Issue
19
Pages
5555-5569
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2141588316
Cited by
73
References
90
Citations by year
2026: 5 · 2025: 2 · 2024: 5 · 2023: 5 · 2022: 6 · 2021: 14 · 2020: 10 · 2019: 7 · 2018: 7 · 2017: 9 · 2016: 3
FWCI
6.08
Type
journal article
Language
en
Open access
Locations
  • Human Molecular Genetics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • the Ocular Genomics Institute
  • National Eye Institute Core (P30EY003790)
Topics
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Immunology and Microbiology › Immunology › Complement system in diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
Keywords
age-related macular degeneration, retinal pigment epithelium, complement system, C3a, EFEMP1, extracellular matrix, MMP-2, interleukin-6, IL-1β, complement activation, therapeutic target
MeSH terms
Animals, Cells, Cultured, Disease Models, Animal, Extracellular Matrix, Macular Degeneration, Mutation, Complement C3a, Complement C5a, Extracellular Matrix Proteins, Matrix Metalloproteinases, Mice, Retinal Pigment Epithelium

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