Corneal and retinal effects of ultraviolet-B exposure in a soft contact lens mouse model

Osama M.A. Ibrahim, Takashi Kojima, Tais Hitomi Wakamatsu, Murat Dogru, Yukihiro Matsumoto, Yoko Ogawa, Junko Ogawa, Kazuno Negishi, Jun Shimazaki, Yasuo Sakamoto, Hiroshi Sasaki, Kazuo Tsubota

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


PURPOSE. To investigate the lipid and DNA oxidative stress as well as corneal and retinal effects after ultraviolet B (UV-B) exposure in mice, with or without silicon hydrogel soft contact lenses (SCL). METHODS. Twenty-eight C57BL6-strain male mice were divided into four groups: group I, control group with no SCL (SCL [-]) and no UV-B exposure (UV-B [-]); group II, senofilcon A SCL (senofilcon [+]) with UV-B exposure (UV-B [+]); group III, lotrafilcon A SCL (lotrafilcon [+]) with UV-B exposure (UV-B [+]); and group IV, no SCL (SCL [-]), but with UV-B exposure (UV-B [+]). All mice except group I received UV-B exposure for 5 days for a total dose of 2.73 J/cm 2. All mice underwent tear hexanoyl-lysine (HEL) and tear cytokine ELISA measurements, and fluorescein and rose bengal corneal staining before and after UV-B exposure. Corneal specimens underwent immunohistochemistry staining with CD45, HEL, 4-hydroxynonenal (4-HNE), and 8-hydroxy-20-deoxyguanosine (8-OHdG) antibodies and evaluation with electron microscopy. RESULTS. All mice without SCL but exposed to UV-B developed corneal edema, ulcers, or epithelial damage compared with mice with senofilcon A SCL and exposure to UV-B. Tear HEL and cytokine levels significantly increased in mice without SCL after UV-B exposure. Immunohistochemistry showed a significantly higher number of cells positively stained for CD45, 8-OHdG, HEL, and 4-HNE in the corneas of mice without SCLs compared with those with senofilcon A after UV-B exposure. CONCLUSION. Silicon hydrogel SCL showed corneal and retinal protective effects, owing to UV blocking properties, against oxidative stress-related membrane lipid and cellular DNA damage.

Original languageEnglish
Pages (from-to)2403-2413
Number of pages11
JournalInvestigative Ophthalmology and Visual Science
Issue number4
Publication statusPublished - 2012 Apr

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience


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