Development of choroidal neovascularization in rats with advanced intense cyclic light-induced retinal degeneration

Daniel Albert, Aneesh Neekhra, Shoujian Wang, Soesiawati R. Darjatmoko, Christine M. Sorenson, Richard R. Dubielzig, Nader Sheibani

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Objectives: To study the progressive changes of intense cyclic light-induced retinal degeneration and to determine whether it results in choroidal neovascularization (CNV). Methods: Albino rats were exposed to 12 hours of 3000-lux cyclic light for 1, 3, or 6 months. Fundus examination, fundus photography, fluorescein and indocyanine green angiography, and optical coherence tomography were performed prior to euthanization. Light-exposed animals were euthanized after 1, 3, or 6 months for histopathological evaluation. Retinas were examined for the presence of 4-hydroxy-2-nonenal- and nitrotyrosinemodified proteins by immunofluorescence staining. Results: Long-term intense cyclic light exposure resulted in retinal degeneration with loss of the outer segments of photoreceptors and approximately two-thirds of the outer nuclear layer as well as development of subretinal pigment epithelium neovascularization after 1 month. Almost the entire outer nuclear layer was absent with the presence of CNV,whichpenetrated theBruchmembraneandextended into the outer retina after 3 months. Absence of the outer nuclear layer, multiple foci ofCNV,retinal pigment epithelial fibrous metaplasia, and connective tissue bands containing blood vessels extending into the retina were observed after 6 months. All intense light-exposed animals showed an increased presence of 4-hydroxy-2-nonenal and nitrotyrosine staining. Optical coherence tomographic and angiographic studies confirmed retinal thinningandleakiness of the newly formed blood vessels. Conclusions: Our results suggest that albino rats develop progressive stages of retinal degeneration and CNV after long-term intense cyclic light exposure, allowing the detailed study of the pathogenesis and treatment of agerelated macular degeneration. Clinical Relevance: The ability to study the progressive pathogenesis of age-related macular degeneration and CNV will provide detailed knowledge about the disease and aid in the development of target-specific therapy.

Original languageEnglish (US)
Pages (from-to)212-222
Number of pages11
JournalArchives of ophthalmology
Volume128
Issue number2
DOIs
StatePublished - Feb 1 2010
Externally publishedYes

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Choroidal Neovascularization
Retinal Degeneration
Light
Retina
Macular Degeneration
Blood Vessels
Retinal Neovascularization
Staining and Labeling
Indocyanine Green
Retinal Pigments
Photography
Optical Coherence Tomography
Metaplasia
Fluorescein
Connective Tissue
Fluorescent Antibody Technique
Angiography
Epithelium
Therapeutics
Proteins

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Development of choroidal neovascularization in rats with advanced intense cyclic light-induced retinal degeneration. / Albert, Daniel; Neekhra, Aneesh; Wang, Shoujian; Darjatmoko, Soesiawati R.; Sorenson, Christine M.; Dubielzig, Richard R.; Sheibani, Nader.

In: Archives of ophthalmology, Vol. 128, No. 2, 01.02.2010, p. 212-222.

Research output: Contribution to journalArticle

Albert, Daniel ; Neekhra, Aneesh ; Wang, Shoujian ; Darjatmoko, Soesiawati R. ; Sorenson, Christine M. ; Dubielzig, Richard R. ; Sheibani, Nader. / Development of choroidal neovascularization in rats with advanced intense cyclic light-induced retinal degeneration. In: Archives of ophthalmology. 2010 ; Vol. 128, No. 2. pp. 212-222.
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