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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 57 (1982), S. 1-6 
    ISSN: 1432-0533
    Keywords: Rat ; Malnutrition ; Protein deprivation ; Peripheral nervous system ; Ultrastructure ; Degeneration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In a previous study the occurrence of nerve fibre degeneration with a distribution as in dying-back neuropathies was described in young rats subjected to severe protein deprivation (Oldfors 1981). In this study the ultrastructural appearance of the degeneration of the nerve fibres at different levels of the longitudinal tail nerves in severely protein-deprived rats has been investigated. Various structural changes were noted, the most common being bands of Büngner indistinguishable from those seen in Wallerian degeneration. In nerve fibres which were less severely affected the most common finding was shrinkage of the axon with concomitant folding of the myelin sheath. Other structural changes included axonal accumulation of 10 nm filaments or mitochondria and other cell organelles, areas of demyelination, and projections of axolemma and Schwann cell membrane into the axon. Signs of axonal regeneration occurred but were infrequent. The degenerative changes seen at various levels of the nerves support the view that the neuropathy is of distal axonal type, but the structural appearance differs from several of the toxic dying-back neuropathies.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 54 (1981), S. 121-127 
    ISSN: 1432-0533
    Keywords: Rat ; Protein deprivation ; Nerve fibre degeneration ; Central nervous system ; Peripheral nervous system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Knowledge from previous reports that kwashiorkor in man may lead to nerve fibre degeneration prompted this study on rats. The rats were subjected to severe protein deprivation from 6 weeks of age. Protein deprivation was achieved by feeding the rats ad lib with a diet containing only 1.5% protein. Control rats received an iso-caloric diet with 14% protein. The vitamin content in both diets was well above normal requirements. In relation to body weight the protein-deprived rats did not consume less food than the control rats. Protein deprivation resulted in stunted body growth, markedly reduced values of serum albumin, and changes in the fur accompanied by areas of alopecia. Furthermore, the protein-deprived rats showed degeneration of nerve fibres in the medial parts of the posterior columns of the cervical but not the sacral part of the spinal cord and nerve fibre degeneration in the distal but not the proximal parts of the longitudinal tail nerves. Teased nerve fibre preparations of the tail nerves revealed changes consistent with the Wallerian type of degeneration. It is concluded that severe protein deprivation in young rats may lead to a “dying-back” type of neuropathy in the central and peripheral nervous systems.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 75 (1988), S. 481-490 
    ISSN: 1432-0533
    Keywords: Sialuria ; Salla disease ; CNS pathology ; Neurofibrillary tangles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A neuropathological study was performed on two patients with Salla disease, one male and one female, from different families. They both died at the age of 41 years. Both patients showed increased excretion of free sialic acid in the urine, psychomotor retardation starting in the 1st year of life, ataxia and spasticity. Several family members of both families were affected with the same disease indicating the hereditary character of the disorder. The neuropathological investigation revealed strikingly similar changes in the two cases. Macroscopically the cerebral white matter was severely reduced. Histologically marked loss of axons and myelin sheaths was accompanied by pronounced astrocytic proliferation. The remaining axons frequently showed ovoid swellings surrounded by a myelin sheath. The reduction of the number of myelin sheaths seemed proportional to the numerical reduction of axons. Many cortical nerve cells displayed in relation to age an abnormal amount of lipofuscin. Neurofibrillary tangles were observed in nerve cells of the neo-cortex, nucleus basalis of Meynert and locus ceruleus. Cerebellum showed moderate loss of Purkinje cells. In the spinal cord axonal degeneration was observed in both ascending and descending tracts.
    Type of Medium: Electronic Resource
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