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Updated: Mar 31, 2026

A Mouse Model for Laser-induced Choroidal Neovascularization

A Mouse Model for Laser-induced Choroidal Neovascularization

Published on: December 27, 2015

Choroidal neovascularization is inhibited via an intraocular decrease of inflammatory cells in mice lacking

Xue Tan¹, Katsuhito Fujiu^2,3,4, Ichiro Manabe²

¹Department of Ophthalmology, The University of Tokyo, Tokyo, Japan.

Scientific Reports

|October 29, 2015

Summary

This summary is machine-generated.

Inhibition of complement factor C3 suppresses choroidal neovascularization (CNV) by reducing inflammatory cell recruitment to the lesion, despite increased systemic inflammation in C3(-/-) mice.

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Area of Science:

Ophthalmology
Immunology
Molecular Biology

Background:

Complement component C3 is present in drusen in early age-related macular degeneration (AMD).
Complement activation upregulates cytokines and inflammatory leukocytes, contributing to choroidal neovascularization (CNV) in exudative AMD.

Purpose of the Study:

To investigate the role of complement factor C3 in the development of laser-induced CNV.
To determine the effect of C3 inhibition on inflammatory cell infiltration and VEGF expression in CNV.

Main Methods:

Laser-induced CNV model in C3(-/-) and wild-type mice.
Flow cytometry to analyze intraocular and peripheral blood immune cell populations.
Quantification of CNV lesion size and Vegfa164 expression.

Main Results:

C3(-/-) mice exhibited significantly smaller CNV lesions compared to wild-type mice.
Reduced proportions of intraocular granulocytes and specific macrophage/monocyte subsets were observed in C3(-/-) mice post-injury.
Elevated systemic inflammation and Vegfa164 expression in intraocular macrophages were noted in C3(-/-) mice.

Conclusions:

Inhibition of complement factor C3 effectively suppresses CNV development.
This suppression is mediated by decreased recruitment of inflammatory cells to the ocular lesion.
Targeting C3 may offer a therapeutic strategy for exudative AMD.