New ultrastructural evidence for a protein transport system in endothelial cells of gerbil brains.

Abstract:

:Pathways for transfer of horseradish peroxidase (HRP) across the cerebral microvasculature were studied in Mongolian gerbils after inducing either unilateral carotid-artery ligation or intracarotid air embolism. Electron microscopy on samples from both ipsilateral and contralateral brain hemispheres showed the reaction product (HRP) in the endothelial cytoplasm of capillaries and arteriols in all animals; in the basal lamina, HRP was seen only after long (3--4 h) ischemic periods. HRP was seen within both spherical and tubular structures, with the latter appearing in obliquely or longitudinally sectioned blood vessels. These endothelial channel-like structures are part of a tubulovesicular network which seemingly exists in the normal endothelium of the gerbil brain. The tubules serve as pathways for proteins into the brain; protein transfer becomes enhanced following circulatory injuries such as ischemia.

journal_name

Acta Neuropathol

journal_title

Acta neuropathologica

authors

Lossinsky AS,Garcia JH,Iwanowski L,Lightfoote WE Jr

doi

10.1007/BF00717032

subject

Has Abstract

pub_date

1979-07-13 00:00:00

pages

105-10

issue

2

eissn

0001-6322

issn

1432-0533

journal_volume

47

pub_type

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