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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 213 (1976), S. 295-303 
    ISSN: 1432-1459
    Keywords: Neuronal ceroid lipofuscinosis ; Lipopigments ; Ultrastructure ; π-granules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei einem Patienten mit spätinfantiler und 3 mit juveniler NCL wurden periphere Nerven verschiedener Herkunft (Armplexus, N. suralis und 2 Hirnnerven) elektronenmikroskopisch untersucht. Im Lichtmikroskop wurden keine signifikanten histologischen Veränderungen gefunden. Kurvilineäre und/oder Fingerabdruck-Einschlüsse konnten ultrastrukturell in jedem Fall festgestellt werden, und zwar hauptsächlich in Schwannschen Zellen. Außerdem fanden sich lamelläre π-granulaähnliche Cytosomen. Sie kamen in den juvenilen Fällen gewöhnlich gar nicht und in dem spätinfantilen Fall lediglich vereinzelt mit kurvilineären/Fingerabdruck-Profilen gemeinsam vor. Bei spärlichen Veränderungen an Axonen und Myelinscheiden könnten diese Cytosomen Zeichen einer chronischen Schädigung der Schwannschen zellen sein und die spezifische morphologische Ausprägung eines „cellulären Verschleißprozesses“ darstellen, wie er im Alter und bei der NCL diskutiert wird. Biopsien aus peripheren Nerven eignen sich aufgrund der zahlreichen π-Granula und ihrer Varianten weniger zur Diagnose der NCL als beispielsweise solche der Haut, der Skeletmuskulatur und des Rectums.
    Notes: Summary Specimens of brachial plexus, sural nerve and two cranial nerves of one patient with the Jansky-Bielschowsky type and 3 patients with the Spielmeyer-Sjögren type of NCL were studied by electron microscopy. Significant light microscopic changes were absent in all specimens. Ultrastructurally, curvilinear and/or fingerprint inclusions were present in each case, located chiefly in Schwann cells. These diagnostic findings were, however, overshadowed by masses of lamellar π-granule-like cytosomes, usually not mixed with curvilinear or finger-print profiles in the juvenile cases and only rarely associated with curvilinear profiles in the late infantile case. Since secondary changes of axons and myelin sheaths were mild, these lamellar cytosomes might indicate chronic damage to Schwann cells, perhaps by “wear and tear” as seen in aging as well as NCL. On account of the abundance of π-granules in NCL, peripheral nerve biopsy appears less suitable for confirming this diagnosis than biopsy of skin, striated muscle and rectal tissue.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Ceroid-lipofuscinosis ; Lipopigments ; Pyramidal cells ; Axonal enlargements ; Isocortex ; Man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Pigment preparations of 800 μm thickness and Golgi studies of the isocortex in juvenile neuronal ceroid-lipofuscinosis, morphologically proven by electron microscopy, revealed: 1. giant axonal dilatations of IIIab-pyramids. These expansions exceeded by far those found in pyramidal cell axons of other isocortical layers; 2. severe numerical reduction of neurons in the ganglionic layer.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 42 (1978), S. 53-57 
    ISSN: 1432-0533
    Keywords: Ceroid-lipofuscinosis ; Lipopigments ; Stellate cells ; Isocortex ; Man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Juvenile neuronal ceroid-lipofuscinosis is associated with a moderate numerical decrease of isocortical neurons. From Nissl preparations, it is not apparent, whether this neuronal rarefication occurs at random or affects specific types of cortical neurons. Lipopigment preparations facilitate the distinction between pyramidal and stellate cells. In juvenile neuronal ceroid-lipofuscinosis, they reveal an almost complete to total loss of small pigment-laden stellate cells. This type of local circuit neurons, scattered throughout the corpuscular and pyramidal layer in varying numbers and patterns of distribution, is common to all isocortical regions. Its pronounced and selective vulnerability in this lysosomal disease may be causally related to the marked functional impairment of the brain.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 68 (1985), S. 224-229 
    ISSN: 1432-0533
    Keywords: Dalmatian dogs ; Lipopigments ; Retina ; Retinopathy ; Ultrastructure ; Ceroidlipofuscinosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Ultrastructural studies of the retinae in two NCL-affected Dalmatian dogs revealed ubiquitous accumulation of lipopigments in numerous cell types of the retina, the fine structure of which closely resembled that seen in NCL-affected English setters. Photoreceptors and other retinal cell types were largely intact. These findings show that the retinal involvement in NCL of our Dalmatian dogs is identical to that of NCL-affected English setters. It also shows that in canine NCL a severe retinopathy, regularly encountered in human childhood NCL, does not develop. Thus, the NCL of Dalmatian dogs —and English setters — represents a reliable model to study human NCL, but for human retinopathia pigmentosa perhaps only at its earliest stage.
    Type of Medium: Electronic Resource
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