Abstract
The pharmacological effects of a human urinary kininogenase (SK-827) on the cerebral microcirculation were studied intravital-microscopically in a rabbit with cerebral microvessel injury induced by glass bead injection into an internal carotid artery. Intravenous administration of SK-827 dilated pial arteries of the brain and increased cerebral hemoglobin content (IHb). SK-827 tended to dilate smaller arterioles more markedly than larger arterioles, and larger arterioles than small arteries. SK-827 appeared to have a vasodilating effects qualitatively different from those of nicardipine and CDP-choline. Findings obtained by concurrent hematological and biochemical examinations also suggested its beneficial effects on the function of platelets and erythrocytes.
MeSH terms
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6-Ketoprostaglandin F1 alpha / blood
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Animals
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Arterioles / drug effects
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Cerebral Arteries / drug effects
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Cerebrovascular Circulation / drug effects*
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Cytidine Diphosphate Choline / pharmacology
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Cytidine Diphosphate Choline / therapeutic use
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Glass
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Hemoglobins / analysis
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Humans
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Injections, Intra-Arterial
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Intracranial Embolism and Thrombosis / drug therapy*
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Intracranial Embolism and Thrombosis / etiology
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Intracranial Embolism and Thrombosis / physiopathology
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Kallikrein-Kinin System / drug effects*
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Kallikreins / pharmacology
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Kallikreins / therapeutic use*
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Microcirculation / drug effects
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Microspheres
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Nicardipine / pharmacology
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Nicardipine / therapeutic use
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Rabbits
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Thromboxane B2 / blood
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Urine / chemistry
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Vasodilator Agents / isolation & purification
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Vasodilator Agents / pharmacology
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Vasodilator Agents / therapeutic use*
Substances
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Hemoglobins
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Vasodilator Agents
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Cytidine Diphosphate Choline
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Thromboxane B2
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6-Ketoprostaglandin F1 alpha
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Nicardipine
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Kallikreins