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  • 21
    ISSN: 1432-0533
    Schlagwort(e): Multiple sclerosis ; Cerebral endothelial cells ; Experimental allergie encephalomyelitis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Multiple sclerosis is considered to be an autoimmune demyelinating disease of the central nervous system. Damage to the blood-brain barrier, of which endothelial cells are the main constitutent, occurs in multiple sclerosis, probably due to immunological mechanisms. We report here the results of immune-mediated damage to these cells, produced by immunizing guinea pigs with an endothelial cell membrane fraction. The fraction was obtained from cerebral endothelial cells grown in vitro and was free from myelin basic protein. The immunized animals developed a chronic neurological illness with evidence of delayed hypersensitivity to the cell membrane fraction but not to myelin antigens. Histological examination of the brain in the acute stage showed mononuclear cell infiltrates aroud blood vessels, while in the chronic phase large areas of demyelination, especially in the periventricular region, were present. This bore a striking similarity to the brain in multiple sclerosis. This may prove to be a useful new animal model for the investigation of the human demyelinating disease.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 22
    ISSN: 1432-0533
    Schlagwort(e): Multiple sclerosis ; Cerebral endothelial cell membrane ; Rhesus monkeys ; Autoimmune encephalomyelitis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary It is postulated that multiple sclerosis might be an autoimmune demyelinating disease of the central nervous system (CNS). The mechanisms involved are unknown but, since the blood-brain barrier (BBB) is damaged, injury to endothelial cells is likely to have occurred. Our previous studies have led us to investigate the autoimmune effect of injuring the blood-brain barrier by immunizing rhesus monkeys with an endothelial cell membrane from the same kind of animals. The immunized animals developed a chronic or a relapsing neurological illness. Histological and ultrastructural examinations of the brain in the acute stage showed infiltrates of mononuclear cells around the blood vessels of the white matter of cerebrum, cerebellum, pons and midbrain, while in the chronic phase, large areas of demyelination and remyelination, especially in the white matter regions, were present. The animals immunized with extraneural antigen, an endothelial cell membrane obtained from human umbilical cord, developed no neurological illness. This results indicate that the brain endothelial cell membrane has an inflammatory encephalitogenic activity which could produce widespread demyelination in animals. The animal model described here may prove to be useful in the pathogenetic investigation of human autoimmune demyelinating diseases.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 23
    ISSN: 1573-2568
    Schlagwort(e): liver tumors ; focal nodular hyperplasia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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