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The impact of sugar moieties of Toxocara canis glycoprotein antigens on their recognition by infected mouse antibodies was investigated in this study. Native TES and recombinant Toxocara mucins generated in Pichia pastoris yeast as well as their deglycosylated forms were used in ELISA. TES and recombinant mucins were equally recognized by T. canis infected mouse IgG1 antibodies. IgM immunoglobulins predominantly recognized TES antigens. Among mucins recognition of Tc-MUC-4 was the most significant. Deglycosylation of antigens resulted in significant loss of IgM and IgG1 reactivity to TES, mucins, Tc-MUC-3 and Tc-MUC-4. The presence of sugar moieties had no influence on IgE binding to native or recombinant T. canis antigens. Our results suggest that glycans are involved in epitope formation what should be taken into consideration in production of recombinant helminth antigens for diagnostic purposes.

Toxocara canis glycans influence antigen recognition by mouse IgG1 and IgM antibodies