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- W2002808692 abstract "We describe the use of tris (2,2'-bipyridine) ruthenium (II) (Rubipy) as a cationic fluorochrome for cytochemical and histochemical studies. After staining with Rubipy, mast cell granules (MCGs) and lymphocyte nuclei (LN) from mouse peritoneal cavity and human breast carcinoma showed intense orange fluorescence and no fading under blue or blue-violet exciting light. Staining at low pH (< 2) or pre-treatment with Al3+ ions strongly diminished the fluorescence of LN, whereas that of MCG was less affected. Ca2+ and Ba2+ ions only diminished MCG fluorescence. Blots of DNA, pectic acid, heparin, and other sulfated polysaccharides stained with Rubipy showed high emission, which was reduced in DNA and pectic acid staining at low pH. Studies with chemically modified heparins suggested that O-sulfates were more important than N-sulfates in Rubipy-heparin interactions. These results are in agreement with an ionic binding mode between Rubipy and heparin. A very suitable method for mast cell detection was found with Mayer's hematoxylin before Rubipy staining, which could be of great value for histopathological studies. This procedure allowed visualization of the mast cells by fluorescence microscopy, and nuclei and tissue morphology were easily visualized under brightfield illumination." @default.
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- W2002808692 title "Cytochemical application of tris (2,2'-bipyridine) ruthenium (II): fluorescence reaction with sulfated polyanions of mast cell granules." @default.
- W2002808692 doi "https://doi.org/10.1177/43.5.7730592" @default.
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