Authors: J C Jiménez W Morelle JC Michalsky E DeiCas
Publish Date: 2006/12/15
Volume: 100, Issue: 4, Pages: 715-720
Abstract
In the present work glycoproteins in the excretory/secretory products of G intestinalis were identified and the reactivity in serum of immunized mice with these molecules was evaluated by western blotting before and after chemical treatment or enzymatic deglycosylation Glycoproteins of 58 and 63 kDa were revealed in E/S products after periodic acidSchiff PAS stain Studies of carbohydrate specificity using digoxigeninlabeled lectins revealed the presence of Oglycans and Nglycans Chemical treatment of excretory/secretory products with sodium metaperiodate or enzymatic deglycosylation with Nglycosidase F reduced the reactivity in serum for proteins of 36 58 and 63 kDa respectively These results show the presence of glycoproteins in E/S products of G intestinalis and suggest that the antibody response is directed against glycoepitopes The expression of carbohydrate moieties in the E/SG intestinalis may play an essential role in the antibody response and may be a target for serodiagnosis or immune intervention in human giardiasisThis research was developed in the framework of collaboration between ECOPA EA3609—Lille2 University groups at the Institute Pasteur of Lille IFR17 and UMR 8576 Laboratory of Structural and Functional Glycobiology CNRS and University of Lille 1 France Juan C Jiménez was supported by a fellowship from “Fondo Nacional de Ciencia Tecnología” e Innovación FONACIT and “Consejo de Desarrollo Científico y Humanístico” Universidad Central de Venezuela We thank Dr Marian Ulrich for her critical revision and correction on the manuscript
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