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  • 1995-1999  (3)
  • 1920-1924
  • Pathogenesis  (2)
  • Channel gating  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 90 (1995), S. 164-169 
    ISSN: 1432-0533
    Keywords: Key words Monocyte ; Scrapie ; Central nervous ; system ; Pathogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The recruitment of monocytes into the scrapie-affected brain was investigated in female mice reconstituted with male bone marrow, using a Y-chromosome-specific probe and F4/80 immunocytochemistry. Recruitment of monocytes could be demonstrated in six out of eight animals and the number of recruited cells correlated with the severity of vacuolation in most, but not all, animals. The proportion of microglia derived from recruited monocytes varied between individual animals, did not correlate with the increase in cellularity (glia) in affected areas of brain and did not affect the length of incubation period. Thus, it is unlikely that the recruitment of monocytes is a pivotal event in the development of early pathological changes in scrapie. The morphology of recruited cells in scrapie lesions, as revealed by F4/80 immunoreactivity, was indistinguishable from that of activated resident microglia.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 90 (1995), S. 164-169 
    ISSN: 1432-0533
    Keywords: Monocyte ; Scrapie ; Central nervous system ; Pathogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The recruitment of monocytes into the scrapie-affected brain was investigated in female mice reconstituted with male bone marrow, using a Y-chromosome-specific probe and F4/80 immunocytochemistry. Recruitment of monocytes could be demonstrated in six out of eight animals and the number of recruited cells correlated with the severity of vacuolation in most, but not all, animals. The proportion of microglia derived from recruited monocytes varied between individual animals, did not correlate with the increase in cellularity (glia) in affected areas of brain and did not affect the length of incubation period. Thus, it is unlikely that the recruitment of monocytes is a pivotal event in the development of early pathological changes in scrapie. The morphology of recruited cells in scrapie lesions, as revealed by F4/80 immunoreactivity, was indistinguishable from that of activated resident microglia.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The journal of membrane biology 146 (1995), S. 133-144 
    ISSN: 1432-1424
    Keywords: Sarcoplasmic reticulum ; Skeletal muscle ; Calcium-release channel ; Ryanodine receptor ; Channel gating
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The effects of changes in luminal [Ca2+] have been investigated in sheep skeletal sarcoplasmic reticulum (SR) Ca2+-release channels after activation of the channels by different ligands from the cytosolic side of the channel. Native heavy SR membrane vesicles were incorporated into planar phospholipid bilayers under voltage-clamp conditions. Experiments were carried out in symmetrical 250 mm Cs+. Lifetime analysis indicates that channels activated solely by cytosolic Ca2+ exhibit at least two open and five closed states. The open events are very brief and are close to the minimum resolvable duration. When channels are activated solely by cytosolic Ca2+, luminal Ca2+ does not appear to exert any regulatory effect. The P 0 and duration of the open and closed lifetimes are unchanged. However, if channels are activated by ATP alone or by ATP plus cytosolic Ca2+, increases in luminal [Ca2+] produce marked increases in P 0 and in the duration of the open lifetimes. Our results demonstrate that maximum activation of the skeletal SR Ca2+-release channel by ATP cannot be obtained in the absence of millimolar luminal [Ca2+].
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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