Does damage of perivascular astrocytes in multiple sclerosis plaques participate in blood-brain barrier permeability? - PubMed (original) (raw)
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- PMID: 1484610
Comparative Study
Does damage of perivascular astrocytes in multiple sclerosis plaques participate in blood-brain barrier permeability?
J Rafałowska et al. Neuropatol Pol. 1992.
Abstract
In six young and two senile MS cases perivascular astrocytes within demyelination lesions were evaluated immunocytochemically. The peroxidase-antiperoxidase method of Sternberger et al. (1970) was used for visualization of glial fibrillary acidic protein (GFAP). In all cases very weak immunoreactivity of perivascular astrocytes was noted. Accumulation of perivascular glial fibers, and infrequently their fragmentation were observed both within active and old demyelination plaques. Clasmatodendrosis, Rosenthal's fibers and prominent regressive changes of astrocyte perikarya were found only in old plaques. A lack of immunoreactivity of perivascular astrocytes was noted within old demyelination lesions. The background of the latter was often immunonegative to GFAP. It is suggested that secondary damage of perivascular astrocytes influences vascular permeability within demyelination lesions including old plaques.
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