Synthesis and characterization of a-D-Galp-(1→3)-b-D-Galp epitopecontaining neoglycoconjugates for Chagas disease serodiagnosis

GIORGI, M. EUGENIA; DE LEDERKREMER, ROSA M.; LOPEZ, ROSANA; DUCREY, IVANA; MELGAREJO, LINDA TORO; MARINO, CARLA

CARBOHYDRATE RESEARCH

ELSEVIER SCI LTD

Lugar: Amsterdam; Año: 2019

0008-6215

The immunodominant epitope α-D-Galp-(1→3)-β-D-Galp-(1→4)-D-GlcNAc, expressed in the mucins of the infective trypomastigote stage of Trypanosoma cruzi has been proposed for multiple clinical applications, from serodiagnosis of protozoan caused diseases to xenotransplantation or cancer vaccinology. It was previously shown that the analogue trisaccharide, with glucose in the reducing end instead of GlcNAc, was as efficient as the natural trisaccharidefor recognition of chagasic antibodies. Here we describe the synthesis of α-D-Galp-(1→3)-β-D-Galp-(1→4)-D-Glcp functionalized as the 6-aminohexyl glycoside and its conjugation to BSA using the squarate method. The conjugate of 6-aminohexyl α-D-Galp-(1→3)-β-D-Galp was also prepared. Both neoglycoconjugates were recognized by serum samples of Trypanosoma cruzi-infected individuals and thus, are promising tools for the improvement of Chagas disease diagnostic applications.