April 1997
Volume 38, Issue 5
Free
Articles  |   April 1997
Prednisolone, platelet-activating factor receptor antagonist, or superoxide dismutase reduced leukocyte entrapment induced by interferon alpha in retinal microcirculation.
Author Affiliations
  • H Nishiwaki
    Department of Ophthalmology and Visual Science, Graduate School of Medicine, Kyoto University, Japan.
  • Y Ogura
    Department of Ophthalmology and Visual Science, Graduate School of Medicine, Kyoto University, Japan.
  • K Miyamoto
    Department of Ophthalmology and Visual Science, Graduate School of Medicine, Kyoto University, Japan.
  • N Hiroshiba
    Department of Ophthalmology and Visual Science, Graduate School of Medicine, Kyoto University, Japan.
  • M Hamada
    Department of Ophthalmology and Visual Science, Graduate School of Medicine, Kyoto University, Japan.
  • Y Honda
    Department of Ophthalmology and Visual Science, Graduate School of Medicine, Kyoto University, Japan.
Investigative Ophthalmology & Visual Science April 1997, Vol.38, 811-816. doi:
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    • Get Citation

      H Nishiwaki, Y Ogura, K Miyamoto, N Hiroshiba, M Hamada, Y Honda; Prednisolone, platelet-activating factor receptor antagonist, or superoxide dismutase reduced leukocyte entrapment induced by interferon alpha in retinal microcirculation.. Invest. Ophthalmol. Vis. Sci. 1997;38(5):811-816.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

PURPOSE: Interferon (IFN) alpha has been suggested as a possible treatment for choroidal neovascularization. However, the pathogenesis of retinal complications after IFN therapy still is unknown. Previously, we have shown that IFN alpha induced leukocyte entrapment in retinal microcirculation. The current study was designed to determine if leukocyte entrapment can be reduced by the agents that modulate leukocyte-endothelial adherence. METHODS: Interferon alpha was administered intravenously in rats. Simultaneously, prednisolone (PSL), platelet-activating factor receptor antagonist (CV-6209), or superoxide dismutase (SOD) was given to the rats. Leukocyte dynamics were observed with acridine orange (AO) digital fluorography, which uses a nuclear fluorescent dye of AO and scanning laser ophthalmoscopy. The number of trapped leukocytes in each group was assessed with a personal computer-based image analysis. RESULTS: Interferon alpha induced leukocyte entrapment in retinal microcirculation and increased leukocyte adherence to the vessel walls. The simultaneous administration of PSL, CV-6209, or SOD inhibited leukocyte adherence to the venous walls and significantly reduced the number of trapped leukocytes. CONCLUSIONS: Acridine orange digital fluorography was helpful to quantitate leukocyte-endothelial interactions in retinal microcirculation. The results suggested that increased leukocyte adherence after IFN alpha administration was reduced significantly by PSL, CV-6209, or SOD. These agents may be useful to prevent IFN-induced microcirculatory disturbances.

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