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  • Argyrophilic grains  (1)
  • Degenerate neurites  (1)
  • Dentate  (1)
  • 1
    ISSN: 1432-0533
    Keywords: Key words Amyotrophic lateral sclerosis ; Dentate ; nucleus ; Multiple system degeneration ; Respirator ; Substantia nigra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This report concerns an autopsy case of amyotrophic lateral sclerosis (ALS) with unusual clinical and neuropathological findings. The patient was a Japanese man without hereditary burden who was 49 years old at the time of death. His clinical manifestation included dysarthria at age 48, followed by dysphagia, atrophy and fasciculation of the tongue, muscle weakness in the four extremities, tremor, rigidity, increased deep tendon reflexes in the upper and lower extremities, and incoordination of the four extremities. He died of respiratory failure 12 months after the disease onset. No respirator administration was performed throughout the clinical course. The neuropathological examination revealed not only degeneration of upper and lower motor neuron systems, including the presence of Bunina bodies and ubiquitin-immunoreactive neuronal inclusions in the lower motor neurons, but also prominent degeneration of the substantia nigra and dentate nucleus with slight neuronal loss in the locus ceruleus and pontine nucleus. To our knowledge, this is the first reported case of sporadic ALS without dementia and respirator support, showing degeneration of the substantia nigra and dentate nucleus. This report may contribute to the resolution of the question concerning the neuropathological heterogeneity of sporadic ALS with respiratory support.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Argyrophilic grains ; Coiled bodies ; Tau protein ; Dendrite ; Dementia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two mildly demented patients with emotional disorder presented massive cortical argyrophilic grains (ArG) in the limbic area and coiled bodies mainly in the white matter. Immunohistochemically, the ArG consisted of partially ubiquitinated full-length phosphorylated tau. A modified Gallyas-Braak method, used after potassium permanganate and oxalic acid pretreatment, revealed many filiform, knobby or pleomorphic spine-like appendages on the ArG. Double immunohistochemical staining using anti-tau with either anti-microtubule-associated protein 2 or anti-neurofilament 200K revealed that ArG were intimately associated with dendrites rather than with axons. Electron microscopic studies with tau immunohistochemistry and the Gallyas-Braak method revealed that the ArG were composed of bundles of smooth tubules of 25-nm diameter. The coiled body-bearing cells had the morphological characteristic of oligodendroglia. These results indicate that the presence of ArG is a cytoskeletal abnormality affecting predominantly the dendrospinal portions of neurons. A survey of diseases with cytoskeletal disorders revealed that a small number of similar argyrophilic granular structures are sometimes observed in progressive supranuclear palsy, Pick's disease with Pick bodies and corticobasal degeneration. Dementia with ArG is thought to be a unique cytoskeletal abnormality associated predominantly with the dendrospinal portions of neurons and oligodendroglia.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 239 (1992), S. 191-194 
    ISSN: 1432-1459
    Keywords: Ghost tangles ; Degenerate neurites ; Astrocytes ; Senile plaques ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Some ghost tangles in the brains of Alzheimer patients were accompanied by many small argyrophilic structures which were electron microscopically confirmed to be degenerate neurites. In these ghost tangles, roughly dispersed 15 nm straight and occasional twisted tubules were penetrated by proliferated astrocytic processes. Immunohistochemically, these ghost tangles lost immunoreactivities to anti-NFT, -tau and -ubiquitin antibodies, but were thioflavine-S fluorescent, though antigenicity to β-protein was not proved. This similarity in composition of degenerate neurite-bearing ghost tangles to senile plaques might be induced by the amyloid nature of tubules, which probably provokes the reaction of neuropils.
    Type of Medium: Electronic Resource
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