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Inhibition of cytochrome oxidase and blue-light damage in rat retina

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Abstract

The activity of cytochrome oxidase, outer nuclear layer thickness, and edema were quantitatively evaluated in the blue-light exposed rat retina. Dark-adapted or cyclic-light reared rats were exposed to blue light with a retinal dose of 380 kJ/m2. Immediately, 1, 2, and 3 day(s) after exposure, the retinas of six rats from each adaptation group were examined. There was no difference between the dark-adapted and cyclic-light reared rats. Immediately after light exposure, cytochrome oxidase activity decreased. The activity in the inner segments remained low at day 1, while severe edema was observed in the inner and outer segments. The outer nuclear layer thickness decreased 1–3 days after exposure. The blue-light exposure inhibited cytochrome oxidase activity and caused retinal injury. Similarity of the injury process in the dark-adapted and cyclic-light reared retinas suggests that rhodopsin was not involved. The inhibition of cytochrome oxidase could be a cause of retinal damage.

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Authors and Affiliations

  1. St. Erik's Eye Hospital, Karolinska Institute, S-11282, Stockholm, Sweden

    Enping Chen

  2. Department of Biophysics, Karolinska Institute, S-11282, Stockholm, Sweden

    Enping Chen

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  1. Enping Chen
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Chen, E. Inhibition of cytochrome oxidase and blue-light damage in rat retina. Graefe's Arch Clin Exp Ophthalmol 231, 416–423 (1993). https://doi.org/10.1007/BF00919652

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  • DOI: https://doi.org/10.1007/BF00919652

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