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  • Polymer and Materials Science  (9)
  • Alzheimer's disease  (4)
  • Tau  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    FEBS Letters 351 (1994), S. 165-167 
    ISSN: 0014-5793
    Keywords: Alzheimer's disease ; Amyloid β protein precursor ; Aβ ; Down's syndrome
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0533
    Keywords: Key words Gerstmann-Sträussler-Scheinker disease ; Alzheimer's disease ; Amyloid ; Amyloid angiopathy ; Prion protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Cerebral amyloid angiopathy is observed in several brain degenerative disorders, but this pathological condition has received little attention in Gerstmann-Sträussler-Scheinker disease (GSS). We report a 69-year-old man who showed the cardinal features of GSS together with typical and extensive congophilic angiopathy. Immunohistochemical studies revealed that the vast majority of the amyloid plaques present in the brain of this patient were consistently labeled by anti-prion protein (PrP) antibody. Double immunostaining disclosed many additional β-protein immunoreactive plaque-like lesions, including a special type of “hybrid” plaque with colocalization of PrP and β-protein (β-PrP). The vascular amyloid deposits seen in both the cerebellum and cerebrum were immunoreactive only to anti-β-protein antibody. It seems likely that the extensive deposition of β-protein amyloid (including brain vascular amyloidosis) seen in this and other similar cases is part of pathology of GSS, although the possibility that this finding is due to ageing or concomitant Alzheimer's disease cannot be completely ruled out.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0533
    Keywords: Key words Thorn-shaped astrocyte ; Glial fibrillary ; tangles ; Tau ; Astrocyte ; Straight tubules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Argyrophilic and tau-positive abnormal structures occurring in glial cells are called glial fibrillary tangles. In the astrocyte, a conspicuous tau-positive structure is known to appear in progressive supranuclear palsy (PSP). In this report, another type of argyrophilic and tau-positive astrocytes is reported. The morphology of this new type is quite different from that of the previously reported tau-positive astrocyte in PSP and they are designated here as thorn-shaped astrocytes (TSA). TSA have an apparently argyrophilic cytoplasm with a few short processes and often have a small eccentric nucleus, whose appearance resembles that of a reactive astrocyte. Immunohistochemically, TSA are positive to anti-tau antibodies but are negative for ubiquitin. Simultaneous immunostaining revealed the coexistence of tau and glial fibrillary acidic protein epitopes in the same cytoplasm. Electron microscopically, bundles of 15-nm straight tubules were included in the cytoplasm together with abundant glial filaments. In the vicinity of a cluster of TSA, related structures of perivascular or subpial tau-positive linings, which correspond to astrocytic end-feet, are sometimes observed. In almost all cases, a few TSA are generally located in a confined area of subpial and subependymal regions. Although TSA appear to be intimately associated with some diseases, they are also found in a wide range of cytoskeletal disorders including the aged brain with neurofibrillary tangles. TSA are presumed to be a secondarily induced product in relation to astrocytic reaction.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0533
    Keywords: Thorn-shaped astrocyte ; Glial fibrillary tangles ; Tau ; Astrocyte ; Straight tubules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Argyrophilic and tau-positive abnormal structures occurring in glial cells are called glial fibrillary tangles. In the astrocyte, a conspicuous tau-positive structure is known to appear in progressive supranuclear palsy (PSP). In this report, another type of argyrophilic and tau-positive astrocytes is reported. The morphology of this new type is quite different from that of the previously reported tau-positive astrocyte in PSP and they are designated here as thorn-shaped astrocytes (TSA). TSA have an apparently argyrophilic cytoplasm with a few short processes and often have a small eccentric nucleus, whose appearance resembles that of a reactive astrocyte. Immunohistochemically, TSA are positive to anti-tau antibodies but are negative for ubiquitin. Simultaneous immunostaining revealed the coexistence of tau and glial fibrillary acidic protein epitopes in the same cytoplasm. Electron microscopically, bundles of 15-nm straight tubules were included in the cytoplasm together with abundant glial filaments. In the vicinity of a cluster of TSA, related structures of perivascular or subpial tau-positive linings, which correspond to astrocytic end-feet, are sometimes observed. In almost all cases, a few TSA are generally located in a confined area of subpial and subependymal regions. Although TSA appear to be intimately associated with some diseases, they are also found in a wide range of cytoskeletal disorders including the aged brain with neurofibrillary tangles. TSA are presumed to be a secondarily induced product in relation to astrocytic reaction.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0533
    Keywords: Dementia pugilistica ; Alzheimer's disease ; Amyloid angiopathy ; β-protein ; Tau protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A histopathological study was carried out on the brains of eight ex-boxers (ages 56 to 83) using conventional histological staining methods and immunocytochemistry with antibodies to amyloid β-protein and the PHF-related tau protein. All cases showed a large number of tau-immunoreactive neurofibrillary tangles and also β-protein immunoreactive senile plaques in the cortex. In the areas with many neurofibrillary tangles, neuropil threads with tau-immunoreactivity were also observed, and some of the senile plaque lesions were surrounded by abnormal neurites with tau-immunoreactivity. Moreover, three cases revealed β-protein-type cerebrovascular amyloid deposits on both leptomeningeal and cortical blood vessels. The present observations indicate that the cerebral pathology of dementia pugilistica is very similar to that of Alzheimer's disease and suggest that these two disorders share some common etiological and pathogenic mechanisms.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0533
    Keywords: Cerebral amyloid angiopathy ; Amyloid β-protein ; Alzheimer's disease ; Spinal leptomeningeal vessels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cerebral amyloid angiopathy (CAA) is characterized by the deposition of amyloid fibrils on leptomeningeal and cortical blood vessels, and the incidence of this disorder increases with age. However, this form of vascular amyloid deposition rarely involves tissues outside of the brain. A 71-year-old woman first developed some deterioration in memory, and soon afterwards suffered from recurrent episodes of subcortical hemorrhage. Histopathological examination of this case revealed typical pathology of Alzheimer's disease with an extensive appearance of β-protein type CAA, and additionally, the spinal leptomeningeal vessels and the pia-arachnoid membranes were also affected by amyloid β-protein deposits. The spinal cord involvement associated with CAA and Alzheimer's disease is unusual, and the present case provides additional important information on the pathogenesis of disorders with β-protein deposition including Alzheimer's disease.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 178 (1977), S. 2747-2751 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 14 (1970), S. 177-184 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The diffusion of sulphonic acid in nylon 6 was investigated using S-35 as tracer by means of film roll method. The concentration profile of sulphonic acid in nylon shows that the diffusion coefficient is dependent on the concentration in the polymer substrate. The activation energy of diffusion changed at 30°C. The temperature was assigned as glass transition. The concentration dependence of the diffusion coefficient was better described by the chemical potential gradient model than the activity gradient model. The selfdiffusion coefficient at a definite saturation value of amino end group site was constant.
    Notes: Die Diffusion von Schwefelsäure in Nylon 6 wurde mit S-35 als Tracer mittels der Membran-Roll-Methode untersucht. Das Diffusionsprofil in Nylon zeigt, daß der Diffusionskoeffizient der Schwefelsäure konzentrationsabhängig ist. Die Aktivierungsenergie der Diffusion verändert sich bei 30°C. Man kann diese Temperatur der Glasumwandlung zuschreiben. Die Konzentrationsabhängigkeit des Diffusionskoeffizienten stimmt viel besser mit dem chemischen Potential-Modell als mit dem Aktivitätsgradienten-Modell überein. Der Selbstdiffusionskoeffizient bei bestimmtem Sättigungsgrad war konstant.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 1 (1980), S. 523-526 
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 16 (1978), S. 2393-2402 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: From the analysis of the permeation of 35S labeled ethanesulfonic acid, through nylon-6 films sorption isotherms were obtained. The films are characterized by their largely different content of carboxyl and amino end groups. It was found that the shape of the isotherm depends on the molar ratio of the two end groups: an S-shape curve for the film containing the carboxyl end group larger than the amino end group and a Langmuir-type curve for the film containing comparable numbers of end groups. These results were explained by the McGregor-Harris theory in which the acid dissociation constants of the two end groups in nylon were estimated experimentally.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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