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  • 1
    ISSN: 1432-0878
    Keywords: Vasopressin precursor ; Endoplasmic reticulum ; Gold/silver intensification ; Immunocytochemistry ; Brattleboro rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This ultrastructural study demonstrates that the vasopressin immunoreactivity found in the occasional, densely stained cells in the hypothalamus of the homozygous Brattleboro rat is localized in the rough endoplasmic reticulum. 50-μm Vibratome sections were stained with anti-vasopressin serum by use of a peroxidase method with 3,3-diaminobenzidine as chromogen. The diaminobenzidine end-product has a specific capability to bind gold particles from a chloroauric acid solution and the bound gold was used to precipitate silver grains from a silver developer. The stained sections were flat embedded in resin and ultrathin sections were cut of areas containing the immuno-identified occasional cells. In these densely stained, vasopressin-immunoreactive cells of homozygous Brattleboro rats the rough endoplasmic reticulum was dilated. The lumen of the reticulum contained both end-products of diaminobenzidine and gold/silver grains, but some parts of the reticulum appeared unstained. No other cell organelles were immunostained and no secretory granules were found. In control rats, gold/silver deposits were found throughout the cytoplasm of vasopressin-immunoreactive cells. In these immunostained cells secretory granules were seen.
    Type of Medium: Electronic Resource
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