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  • 1
    ISSN: 1432-0533
    Keywords: Key words Myelin-associated glycoprotein (MAG) ; Anti-MAG autoantibodies ; Paraproteinemic ; polyneuropathy ; Basal lamina ; Confocal microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report here on a patient with anti-myelin-associated glycoprotein (MAG) neuropathy in whom examination of a sural nerve biopsy by multichannel confocal microscopy showed a partly overlapping distribution of MAG and IgM deposits in myelinated fibers. Our data demonstrate that MAG in Schmidt-Lanterman incisures and paranodal loops, as well as some additional HNK-1-positive components of the basal lamina, are the major targets of the anti-MAG monoclonal IgM autoantibodies in this neuropathy in vivo. Perforation of the basal lamina can allow the penetration and binding of anti-MAG IgM inside myelinated fibers. Our results support and extend the notion that the production of monoclonal anti-MAG IgM may be antigenically driven by MAG molecules and that this process may occur in the immunologically privileged environment of the nerve prior to the appearance of a genuine gammopathy in serum.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 225 (1981), S. 57-62 
    ISSN: 1432-1459
    Keywords: Myoclonus, postanoxic ; 5-Hydroxytryptophane ; 5-Hydroxyindolacetic acid ; Decarboxylase inhibitor ; Reflex loop
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wurde früher angenommen, daß der postanoxische Myoklonus durch eine Dysfunktion des ventro-lateralen thalamischen Nucleus bedingt ist. Diese Hypothese wurde durch verschiedene stereotaktische Studien in Frage gestellt. Neurochemische Untersuchungen, insbesondere die Messung von 5-Hydroxyindol-Essigsäure im Liquor öffnete den Weg zu neuen theoretischen und therapeutischen Möglichkeiten, Bahnen des serotoninergischen Systems zu beeinflussen. Ein typischer Fall wird vorgestellt, der unter einer Kombinationstherapie von 5-Hydroxytryptophan und einem Decarboxylase-Hemmer eine wesentliche Besserung zeigte. Die Pathogenese und therapeutische Möglichkeiten des postanoxischen Myoklonus werden diskutiert.
    Notes: Summary Postanoxic myoclonus was first accepted as being related to a dysfunction of the ventrolateral thalamic nucleus. Several stereotaxic studies have invalidated this hypothesis. The neurochemical approach, in particular the measure of 5-hydroxyindolacetic acid in the cerebrospinal fluid, has opened new theoretical and therapeutic possibilities involving serotoninergic pathways. A typical case is presented who improved markedly under a combined therapy with 5-hydroxytryptophan and a decarboxylase inhibitor. A review of the pathogenesis and therapeutic approach to postanoxic myoclonus is presented.
    Type of Medium: Electronic Resource
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