The effects of 2% rebamipide ophthalmic solution on the tear functions and ocular surface of the superoxide dismutase-1 (sod1) knockout mice

Takeshi Ohguchi, Takashi Kojima, Osama M. Ibrahim, Taeko Nagata, Takahiko Shimizu, Takuji Shirasawa, Tetsuya Kawakita, Yoshiyuki Satake, Kazuo Tsubota, Jun Shimazaki, Susumu Ishida

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Purpose. To investigate the efficacy of 2% rebamipide ophthalmic solution on the tear functions and ocular surface status of the superoxide dismutase-1(Sod1-/-) mice. Methods. Two percent Rebamipide ophthalmic solution was applied to 40-week-old male Sod1-/- and wild-type (WT) mice four times a day for 2 weeks. We examined the cytokine concentrations in the tear fluid (by CytoBead assay), tear film break-up time, amount of tear production, and expressions of mucins 1, 4, and 5AC, by RT-PCR. We also performed vital staining of the ocular surface, PAS staining for muc5AC, and immunohistochemical stainings for 4-hydroxy-2-nonenal (4-HNE), 8-hydroxy-2′-deoxyguanosine (8-OHdG), in the conjunctiva to compare the Results before and after rebamipide instillations. Results. The tear functions and ocular surface epithelial damage scores were significantly worse in the Sod1-/- than in the WT mice. Application of 2% rebamipide for 2 weeks significantly improved the tear film break-up time, the amount of tear production, and the corneal epithelial damage scores, which also significantly increased the conjunctival goblet cell density and muc5 mRNA expression, in the Sod1-/- mice. The mean IL-6, IL-17, TNF-α, and IFN-γ levels in the tear fluid were reduced significantly along with a significant decrease in the density of cells positive for 4-HNE and 8-OHdG in the conjunctiva. Conclusions. Two percent Rebamipide ophthalmic solution significantly improved the tear stability and corneal epithelial damage, and enhanced the expression of muc5 mRNA on the ocular surface. We also observed anti-inflammatory effects in the tear film together with antioxidative effects in the conjunctiva, suggesting the efficacy of rebamipide in age-related dry eye disease attributable to SOD1 knockout.

元の言語English
ページ(範囲)7793-7802
ページ数10
ジャーナルInvestigative Ophthalmology and Visual Science
54
発行部数12
DOI
出版物ステータスPublished - 2013 11 21

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ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

これを引用

Ohguchi, T., Kojima, T., Ibrahim, O. M., Nagata, T., Shimizu, T., Shirasawa, T., Kawakita, T., Satake, Y., Tsubota, K., Shimazaki, J., & Ishida, S. (2013). The effects of 2% rebamipide ophthalmic solution on the tear functions and ocular surface of the superoxide dismutase-1 (sod1) knockout mice. Investigative Ophthalmology and Visual Science, 54(12), 7793-7802. https://doi.org/10.1167/iovs.13-13128