Dynamic changes of fenestrations in choriocapillaries.
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概要
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The ultrastructure of choriocapillaries from dark-adapted eyes of Uroloncha Striata Domestica was studied with a freeze-fracture replica technique. Fenestrations were observed on the surface of the cleavage plane of the choriocapillary endothelial membrane. Fenestrations of endothelial cells facing Bruch's membrane in controls were densely distributed and clearly separated from the non-fenestrated areas. The average diameter of the fenestrations was 71±6 nm and the average number of fenestrations was 39.1±6.0/μm<SUP>2</SUP>. In the dark-adapted eye, the fenestrations of endothelial cells facing Bruch's membrane were scattered and it was impossible to clearly distinguish the fenestrated areas from non-fenestrated areas. The average diameter of the fenestrations was 70±6 nm and the average number of fenestrations was 27.4±7.6/μm<SUP>2</SUP>. The difference in fenestration density between control and adapted eyes was significant (P<0.01). These findings indicate that the distribution pattern of fenestrations in endothelial cells of choriocapillaries is dynamic and results in a decrease in vascular permeability of the choriocapillaries in the dark.
- 久留米大学医学部 The Kurume Medical Journal 編集部の論文
著者
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YOSHIOKA HISAHARU
Department of Ophthalmology, Kurume University School of Medicine
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ISHIBASHI RISEI
Department of Ophthalmology, Kurume University School of Medicine
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SUGITA ARATA
Department of Ophthalmology, Kurume University School of Medicine
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SUGITA ARATA
Department of Anatomy Kurume University School of Medicine
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