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  • 1985-1989  (2)
  • 11 S globulin  (1)
  • Copper therapy  (1)
  • 1
    ISSN: 1432-0533
    Schlagwort(e): Macular mouse ; Menkes kinky hair disease ; Copper therapy ; Mitochondrial abnormalities
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The hemizygote of the macular mutant mice, which is clinically and neuropathologically considered to be a model of Menkes kinky hair disease (MKHD), were injected intraperitoneally four times with 10, 20, 20 and 30 μg of cupric chloride on days 4, 6, 8 and 10 after birth, respectively. Their cerebral and cerebellar cortices were chronologically examined by electron microscopy. In the cerebral cortes, only a few abnormal mitochondria with electron-lucent matrix and short peripherally located cristae were scattered in the neurons on day 14, and these had almost entirely vanished after day 21. In the cerebellar cortex, abnormal mitochondria were frequently found on day 14 in the dendrites of the Purkinje cells, whereas they were only occasionally observed in their cytoplasm. Those in the dendrites had decreased in number on day 30, and only a few of them were seen in the cerebellum after day 45. These results show that the copper therapy reduced ultrastructural abnormalities in the hemizygote of this mutant mouse.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1615-6102
    Schlagwort(e): Budding ; Crystalloid ; 11 S globulin ; Protein body ; Pumpkin cotyledon ; Vacuole
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Vacuoles were isolated from pumpkin cotyledons at three developmental stages and judged to be pure by light microscopic inspection and marker enzyme assays. The time sequence of structural changes of vacuoles were examined by light microscopic inspection in parallel with their stainability with neutral red. Vacuoles isolated from the early stage of cotyledon development were heterogeneous in size (Ø=2–10 Μm) but stained uniformly with the dye. In contrast, vacuoles isolated from the middle stage were much larger (Ø=5–15 Μm), and there exist one to three cores, unstainable with neutral red, within a single vacuole. Electron microscopic observation confirms that vacuoles contain a few protein cores in cotyledon cells at the middle stage. Characteristically at this stage, it was observable that some large cores (Ø=4Μm) were budding from vacuoles. At the late stage, size of vacuoles becomes much smaller (Ø=6Μm), nearly equal to that of the protein bodies in dry seeds. Importantly, at this stage most of the volume of each vacuole was occupied by a single core, and only a small matrix space was stainable with neutral red. Suborganellar fractionation indicates that the vacuolar cores were identical to the crystalloids deposited in the protein bodies in dry seeds. Overall results strongly provide the evidence that one crystalloid buds from the vacuole during the later stage of seed maturation, giving rise to a protein body.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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