Histochemical Detection of Glycoconjugates in Colonic Epithelium of the Goat

Abstract

The distribution of glycoconjugates in the goat descending colon was studied by means of light microscopic histochemical methods. The staining procedures employed were horseradish peroxidase conjugated lectin, alcian blue (AB) pH 2.5, periodic acid-Schiff (PAS), ABpH 2.5-PAS, high iron diamine (HID), HID-ABpH 2.5. The lectins used in the present study were concanavalin A (ConA), Ricinus communis agglutinin I(RCA-I), Solanum tuberosum agglutinin (STL) and Limulus polyphemus agglutinin(LPA) . The result revealed that descending colonic epithelium of the goat contained acid sulfated glycoconjugates and neutral glycoconjugates with ∝-D-mannose, ∝-D-glucose, β-D-galactose, Nacetylglucosamine and sialic acid residues. The quantity of neutral glycoconjugates with ∝-D-mannose, ∝-D-glucose, β-D-galactose and N-acetylglucosamine increased from mucosal crypt up to mucosal surface of the epithelium, while sialic acid residues and sulfated glycoconjugates decreased from mucosal crypt to mucosal surface.