Cited by 56Retinal Diseases and TreatmentsComplement system in diseasesOcular Diseases and Behçet’s Syndrome

Molecular response of chorioretinal endothelial cells to complement injury: Implications for macular degeneration

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Zeng, Shemin, Whitmore, S Scott, Sohn, Elliott H, Riker, Megan J, Wiley, Luke A, Scheetz, Todd E, Stone, Edwin M, Tucker, Budd A +1 more·2016·The Journal of Pathology

Abstract

Age‐related macular degeneration ( AMD ) is a common, blinding disease of the elderly in which macular photoreceptor cells, retinal pigment epithelium and choriocapillaris endothelial cells ultimately degenerate. Recent studies have found that degeneration of the choriocapillaris occurs early in this disease and that endothelial cell drop‐out is concomitant with increased deposition of the complement membrane attack complex ( MAC ) at the choroidal endothelium. However, the impact of MAC injury to choroidal endothelial cells is poorly understood. To model this event in vitro , and to study the downstream consequences of MAC injury, endothelial cells were exposed to complement from human serum, compared to heat‐inactivated serum, which lacks complement components. Cells exposed to complement components in human serum showed increased labelling with antibodies directed against the MAC , time‐ and dose‐dependent cell death, as assessed by lactate dehydrogenase assay and increased permeability. RNA ‐Seq analysis following complement injury revealed increased expression of genes associated with angiogenesis including matrix metalloproteinase ( MMP )‐3 and −9, and VEGF ‐A. The MAC ‐induced increase in MMP9 RNA expression was validated using C5 ‐depleted serum compared to C5 ‐reconstituted serum. Increased levels of MMP9 were also established, using western blot and zymography. These data suggest that, in addition to cell lysis, complement attack on choroidal endothelial cells promotes an angiogenic phenotype in surviving cells. Copyright © 2015 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.

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  • MMP expression in choroidal endothelial cells has been found to increase with MAC-dependent complement activation, suggesting that complement may promote angiogenesis through multiple pathways.

    “MMP expression in choroidal endothelial cells has also been found to increase with MAC-dependent complement activation [172], suggesting that complement may promote angiogenesis through multiple pathways.”

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Authors
Zeng, S., Whitmore, S. S., Sohn, E. H., Riker, M. J., Wiley, L. A., Scheetz, T. E., Stone, E. M., Tucker, B. A., & Mullins, R. F.
Affiliations
University of Iowa (US)
Corresponding author
Mullins, Robert F
Venue
The Journal of Pathology
Publisher
Wiley
Published
2015-12-24
Volume
238
Issue
3
Pages
446-456
ISSN
  • 0022-3417 (ISSN-L)
  • 1096-9896
OpenAlex
W2171447320
Cited by
56
References
43
Citations by year
2026: 3 · 2025: 3 · 2024: 3 · 2023: 3 · 2022: 6 · 2021: 11 · 2020: 3 · 2019: 6 · 2018: 8 · 2017: 5 · 2016: 5
FWCI
5.77
Type
journal article
Language
en
Open access
Locations
  • The Journal of Pathology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health (EY‐024605, EY‐023187, 1‐DP2‐OD007483‐01)
Topics
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Immunology and Microbiology › Immunology › Complement system in diseases
  • Health Sciences › Medicine › Ophthalmology › Ocular Diseases and Behçet’s Syndrome
Keywords
age-related macular degeneration, membrane attack complex, endothelial cell death, endothelial permeability, angiogenesis, MMP-9, matrix metalloproteinase-3, VEGF-A, choroidal degeneration
MeSH terms
Aged, Aged, 80 and over, Antibodies, Cells, Cultured, Choroid, Complement System Proteins, Complement Activation, Dose-Response Relationship, Immunologic, Female, Humans, Macular Degeneration, Male, Up-Regulation, Complement Membrane Attack Complex, Cell Death, Matrix Metalloproteinase 3, Matrix Metalloproteinase 9, Vascular Endothelial Growth Factor A, Endothelial Cells

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