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PURPOSE Leukocytes have been reported to be less deformable and more activated in diabetes. It has also been suggested that they cause microvascular occlusions that may cause diabetic microangiopathy. This study was designed to evaluate in vivo leukocyte dynamics in the retinal microcirculation of diabetic rats. METHODS Streptozotocin (STZ)-induced(More)
PURPOSE To evaluate quantitatively the effects of blocking of adhesion molecules (P-selectin or intercellular adhesion molecule-1 [ICAM-1]) on leukocyte dynamics in the retinal microcirculation in vivo during ischemia-reperfusion injury and the therapeutic efficacy of the blocking of adhesion molecules on retinal ischemia-reperfusion injury. METHODS(More)
PURPOSE To evaluate the effects of irradiation on leukocyte dynamics in the rat retinal microcirculation. METHODS Thirty-five Brown-Norway rats received a dose of 10 Gy irradiation in one fraction. Leukocyte dynamics were studied with acridine orange digital fluorography, in which a nuclear fluorescent dye of acridine orange is used and examined by(More)
PURPOSE To evaluate quantitatively leukocyte dynamics in vivo in the rat retinal microcirculation during ischemia reperfusion injury with the use of acridine orange digital fluorography. METHODS Retinal ischemia was induced in anesthetized pigmented rats by a temporary ligation of the optic nerve. After 60 minutes of ischemia, leukocyte behavior in the(More)
PURPOSE To perform acridine orange digital fluorography on rats after scatter photocoagulation to investigate alterations of retinal microcirculation at the capillary level, the authors used leukocyte dynamics as a parameter. METHODS Twenty-five pigmented rats (Long-Evans) were studied. Argon laser photocoagulation, extending 6 disc diameters from the(More)
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(More)
In vivo retinal leukocyte behavior in the experimental autoimmune uveoretinitis (EAU) of rats was investigated using acridine orange digital fluorography. The technique employed high resolution images obtained from a scanning laser ophthalmoscope (SLO) subsequent to staining with the fluorescent nuclear dye, acridine orange. Two weeks after immunization(More)
P-selectin is one of the adhesion molecules involved in leukocyte rolling during an inflammatory reaction. The aim of this study was to examine the role of P-selectin in leukocyte-endothelial interactions in retinal microcirculation during ocular inflammation, known as endotoxin-induced uveitis (EIU), in vivo. EIU was induced in Lewis rats by footpad(More)
BACKGROUND AND PURPOSE Tacrolimus, an immunosuppressant agent, has been shown to reduce tissue injury and leukocyte accumulation after transient ischemia. This study was designed to evaluate quantitatively the inhibitory effects of tacrolimus on leukocyte rolling and on subsequent leukocyte accumulation in vivo after transient retinal ischemia and the(More)
PURPOSE The interaction between leukocytes and vascular endothelial cells plays an important role in various inflammatory disorders. This study evaluated leukocyte behavior in the retina during endotoxin-induced uveitis (EIU) in vivo. METHODS EIU was induced in female Lewis rats by footpad injection of lipopolysaccharide (LPS). The time-course changes of(More)