Carbohydrates detection in the hepatic egg--granuloma system using lectin histochemistry/Deteccion de hidratos de carbono en el sistema granuloma-huevo hepatico usando lectina histoquimica

This study aims to evaluate the egg-granuloma system in hepatic tissues using lectin histochemistry in experimental Schistosomiasis. Eight Swiss mice were infected with a local strain of Schistosoma mansoni, being submitted forty days later to a perfusion after which slices of liver (4µm) were prepa...

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Published inInternational journal of morphology Vol. 26; no. 4; p. 967
Main Authors Melo-Junior, Mario Ribeiro, Cavalcanti, Carmelita de Lima Bezerra, de Pontes-Filho, Nicodemos Teles, de Carvalho, Jr., Luiz Bezerra, Beltrao, Eduardo Isidoro Carneiro
Format Journal Article
LanguageSpanish
Published Universidad de La Frontera, Facultad de Medicina 01.12.2008
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Summary:This study aims to evaluate the egg-granuloma system in hepatic tissues using lectin histochemistry in experimental Schistosomiasis. Eight Swiss mice were infected with a local strain of Schistosoma mansoni, being submitted forty days later to a perfusion after which slices of liver (4µm) were prepared. The tissue samples were incubated with the following peroxidase conjugated lectins: Peanut agglutinin (PNA), Wheat Germ agglutinin (WGA), and Concanavalin A (Con A). All lectins recognized the glycoconjugates in the adult worm tegument. In the hepatic tissue, WGA presented the highest staining followed by PNA and Con A. The PNA presented the most intense staining of the egg-granuloma system while WGA stained the hepatic sinusoid cells and Con A bound preferentially the fibrosis rings of granuloma and the surrounding hepatic parenquima. WGA and PNA indicated the presence of residues of N-acetyl-glucosamine and galactose in the surface of Schistosoma mansoni eggs in the hepatic granulomas. In conclusion, using PNA, Con A and WGA our study presented different aspects of the egg-granuloma and Tegument of Schistosoma mansoni as well as indicated differences in the peri-ovular granulomas indicating alterations in the cellular mechanism of expression of surface carbohydrates during progression of the Schistosomiasis. KEY WORDS: Lectins; Egg-granuloma system; Liver; Schistosoma mansoni. El objetivo del estudio fue evaluar el sistema de los huevos de los granulomas en los tejidos hepaticos, utilizando histoquimica de lectinas esquistosomiasis. Ocho ratones suizos experimentales fueron infectados con una cepa local de Schistosoma mansoni y luego a los cuarenta dias fueron sometidos a la perfusion y se prepararon cortes de higado (4 [micron]m). Las muestras de los tejidos fueron incubadas con las siguientes peroxidasas lectinas conjugadas: aglutinina de mani (PNA), aglutinina de germenn de trigo (WGA), Concanavalin A (Con A). Todas las lectinas reconocieron las glicoconjugadas en el tegumento del gusano adulto. El tejido hepatico con WGA presento mayor coloracion seguido de PNA y Con A. El PNA presento la mas intensa tincion de los huevos mientras el granuloma del sistema WGA tino las celulas hepaticas sinusoides y las Con A estuvieron siempre presentes en los anillos de la fibrosis y alrededor de los granulomas hepaticos del parenquima. WGA y PNA indicaron la presencia de residuos de N--acetil--glucosamina y galactosa en la superficie de los huevos de Schistosoma mansoni en los granulomas hepaticos de esquistosomiasis. PALABRAS CLAVE: Lectinas; Sistema huevo-granuloma; Higado; Schistosoma mansoni.
ISSN:0717-9367
0717-9502