High-resolution cytochemistry of neuraminic and hexuronic acid- containing macromolecules applying the enzyme-gold approachI Londono and M Bendayan Department of Anatomy, Faculty of Medicine, University of Montreal, Quebec, Canada. We localized acidic glycoconjugates at the ultrastructural level by applying the enzyme-gold approach. Neuraminidase and hyaluronidase were adsorbed to colloidal gold particles and applied to tissue sections under optimal conditions for their enzymatic activity. Neuraminidase- gold labeling was distributed over the Golgi apparatus and associated secretory granules in exocrine pancreatic cells and duodenal goblet cells. Mitochondria were labeled over inner membranes. Labeling was also found over the dispersed chromatin in the nucleus. Plasma membranes, particularly the apical side, were labeled by gold particles. On the other hand, incubation of tissue sections with the hyaluronidase-gold complex resulted in intense labeling of the rER membranes, the plasma membrane, and the dense chromatin in the nucleus. Labeling was also found over the Golgi apparatus and associated secretory granules, but only in duodenal goblet cells. Specificity of the results was confirmed by various control experiments performed, indicating that the enzyme-gold technique is useful for detecting linked-sugar residues on tissue thin sections. Labelings found over intra- and extracellular compartments in the present work are discussed in light of previous biochemical indications as well as of other histochemical detections of these glycoconjugates.
Volume 36,
Issue 8,
pp. 1005-1014,
08/01/1988
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S. P. Evanko, W. T. Parks, and T. N. Wight Intracellular Hyaluronan in Arterial Smooth Muscle Cells: Association with Microtubules, RHAMM, and the Mitotic Spindle J. Histochem. Cytochem., December 1, 2004; 52(12): 1525 - 1536. [Abstract] [Full Text] [PDF] |
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N. Bruneau, D. Lombardo, and M. Bendayan The Affinity Binding Sites of Pancreatic Bile Salt-Dependent Lipase in Pancreatic and Intestinal Tissues J. Histochem. Cytochem., February 1, 2000; 48(2): 267 - 276. [Abstract] [Full Text] |
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S. P. Evanko and T. N. Wight Intracellular Localization of Hyaluronan in Proliferating Cells J. Histochem. Cytochem., October 1, 1999; 47(10): 1331 - 1342. [Abstract] [Full Text] |
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