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Therapeutic Effects of Topical 8-Oxo-2ʹ-deoxyguanosine on Ethanol-Induced Ocular Chemical Injury Models

Authors: Myung Hee Chung; Sang Taek Im; Dong Hyun Kim; Mee Kum Kim; Jin Young Yoon; Joo Youn Oh; Hae Jung Paik; +1 Authors

Therapeutic Effects of Topical 8-Oxo-2ʹ-deoxyguanosine on Ethanol-Induced Ocular Chemical Injury Models

Abstract

Purpose: To evaluate the therapeutic effects of topical 8-oxo-2ʹ-deoxyguanosine (8-oxo-dG) on experimental ocular chemical injury models. Methods: We created ocular chemical injury models with 8-week-old BALB/c mice (n = 70) by applying 100% ethanol; the mice were then treated with 8-oxo-dG eye drops 10 and 5 mg/mL and phosphate-buffered saline (PBS) twice daily. After 7 days, clinical findings such as corneal integrity, clarity, and neovascularization were assessed. Histology, immunohistochemistry findings, and inflammatory cytokine levels using real-time polymerase chain reactions in the corneas of the mice were also analyzed. Results: Topical application of 8-oxo-dG eye drops resulted in a significant improvement of epithelial defects and clarity, dose dependently (each P < 0.001). Inflammatory cell infiltration and corneal stromal edema were also decreased in the 8-oxo-dG-treated mice compared with PBS-treated controls, based on hematoxylin and eosin staining. The expressions of F4/80 and neutrophil elastase–positive inflammatory cells and IL-1 and TNF-α cytokine levels were significantly reduced in the 8-oxo-dG group compared with the PBS group (each P < 0.01). Conclusions: Topical 8-oxo-dG application showed an excellent therapeutic effect in ocular chemical injury models by suppressing inflammation.

Keywords

Male, Analysis of Variance, Mice, Inbred BALB C, Ethanol, Corneal Stroma, Epithelium, Corneal, Deoxyguanosine, Cornea, Disease Models, Animal, Eye Burns, Mice, 8-Hydroxy-2'-Deoxyguanosine, Burns, Chemical, Animals, Cytokines, Corneal Neovascularization, Ophthalmic Solutions, Corneal Injuries

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
10
Top 10%
Average
Average
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