Cited by 125Complement system in diseasesRetinal Diseases and TreatmentsOcular Diseases and Behçet’s Syndrome

Complement activation via alternative pathway is critical in the development of laser-induced choroidal neovascularization: Role of factor B and factor H

Bora, Nalini S, Kaliappan, Sankaranarayanan, Jha, Purushottam, Xu, Qin, Sohn, Jeong-Hyeon, Dhaulakhandi, Dhara B, Kaplan, Henry J, Bora, Puran S·2006·The Journal of Immunology

Abstract

The objective of this study was to explore the role of classical, lectin, and alternative pathways of complement activation in laser-induced choroidal neovascularization (CNV). The classical and alternative pathways were blocked in C57BL/6 mice by small interfering RNAs (siRNA) directed against C1q and factor B, respectively. C4−/− mice developed CNV similar to their wild-type controls and inhibition of C1q by siRNA had no effect on the development of CNV. In contrast, CNV was significantly inhibited (p < 0.001) in C5−/− mice and C57BL/6 mice treated with factor B siRNA. Inhibition of the alternative pathway by factor B siRNA resulted in decreased levels of membrane attack complex and angiogenic factors–vascular endothelial growth factor and TGF-β2. Furthermore, factor B was up-regulated in complement sufficient C57BL/6 mice at day 1 postlaser and remained elevated at day 7. Significantly reduced levels of factor H were observed at day 3 in these animals. In conclusion, our results demonstrate that activation of the factor B-dependent alternative pathway, but not the classical or lectin pathways, was essential for the development of CNV in mouse model of laser-induced CNV. Thus, specific blockade of the alternative pathway may represent a therapeutically relevant strategy for the inhibition of CNV.

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Registry

Crossref · 10.4049/jimmunol.177.3.1872

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  • Several experiments using mouse models of laser-induced CNV have demonstrated that all complement pathways, particularly the alternative and terminal pathways, play a significant role in angiogenesis.

    “Several experiments using mouse models of laser-induced CNV have demonstrated that all complement pathways, particularly the alternative and terminal pathways, play a significant role in angiogenesis [150,152,153,154,155,156,157,158,159,160,161,162,163].”

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Authors
Bora, N. S., Kaliappan, S., Jha, P., Xu, Q., Sohn, J.-H., Dhaulakhandi, D. B., Kaplan, H. J., & Bora, P. S.
Affiliations
  • University of Arkansas for Medical Sciences (US)
  • University of Louisville (US)
Venue
The Journal of Immunology
Published
2006-08-01
Volume
177
Issue
3
Pages
1872-1878
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W1585939626
Cited by
124
References
37
Citations by year
2025: 1 · 2024: 3 · 2023: 4 · 2022: 7 · 2021: 4 · 2020: 7 · 2019: 1 · 2018: 5 · 2017: 11 · 2016: 5 · 2015: 8 · 2014: 9 · 2013: 4 · 2012: 12
FWCI
3.42
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Eye Institute (R01EY013335, R01EY014623, EY 014623, EY-13335)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Complement system in diseases
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Health Sciences › Medicine › Ophthalmology › Ocular Diseases and Behçet’s Syndrome
Keywords
choroidal neovascularization, laser-induced CNV, alternative complement pathway, factor B, complement factor H, complement activation, C1q, C5, membrane attack complex, angiogenesis, vascular endothelial growth factor, TGF-beta2, siRNA knockdown
MeSH terms
Animals, Complement Pathway, Alternative, Complement C4, Complement C5, Injections, Intravenous, Lasers, Male, Mice, Inbred C57BL, Complement Factor B, Down-Regulation, Up-Regulation, Complement C1q, Complement Membrane Attack Complex, Transforming Growth Factor beta, Complement Factor H, Mice, Knockout, Choroidal Neovascularization, RNA, Small Interfering, Vascular Endothelial Growth Factor A, Mice, Transforming Growth Factor beta2

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