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Ultrastructural visualization of cellular carbohydrate components by means of lectins on ultrathin glycol methacrylate sections

D Gros, A Obrenovitch, CE Challice, M Monsigny and J Schrevel

A method for the visualization of cellular carbohydrate components by both light and electron microscopy using lectins on glycol methacrylate sections is proposed. This method, which is an application of the lectin-peroxidase affinity technique, solves the problem of limited penetration when it is attempted to demonstrated lectins receptors within the tissue block. Following partial dissolution of glycol methacrylate from thin sections using alcohol, they are incubated successively with lectin (Concanavalin A or wheat germ agglutinin), horseradish peroxidase (Sigma, type II), 3-3' diaminobenzidine and H2O2 and then with OsO4-Different kinds of tissues and cells have been used to test the method: mouse myocardium, rat epididymis, a protozoon Gregarina blaberae and the bacterium Escherichia coli. The localization of carbohydrate residues deomonstrated by this method within the different tissues and cells is consistent with the findings from other published studies. Controls have been performed (i.e., omission of the lectin, lectin and its inhibitor) and these demonstrate the specificity of the method.

Volume 25, Issue 2, pp. 104-114, 02/01/1977
Copyright © 1977 by The Histochemical Society


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