Novel antibodies reacting with two neighboring gangliosides are induced in rabbits immunized with bovine brain gangliosides

MOYANO, AL; COMÍN, R; VILCAES, AA; ROTH, GA; IRAZOQUI FJ; NORES, GA

GLYCOBIOLOGY

OXFORD UNIV PRESS INC

Lugar: Oxford; Año: 2012 vol. 22 p. 1768 - 1774

0959-6658

Immunization of rabbits with bovine brain gangliosides induced an experimental neuropathy, with clinical signs resembling Guillain–Barré syndrome. All the immunized animals developed immunoglobulin G immunoreactivity to GM1 ganglioside. In a few (4 of 27) animals, an additional anti-ganglioside antibody population showing an unusual binding behavior was detected. Enzyme-linked immunosorbent assay and thin-layer chromatography immunostaining analyses showed that the binding of these unusual antibodies required the presence of two co-localized gangliosides. Maximal interaction was observed to a mixture of GM1 and GD1b, but the antibodies also showed animals developed immunoglobulin G immunoreactivity to GM1 ganglioside. In a few (4 of 27) animals, an additional anti-ganglioside antibody population showing an unusual binding behavior was detected. Enzyme-linked immunosorbent assay and thin-layer chromatography immunostaining analyses showed that the binding of these unusual antibodies required the presence of two co-localized gangliosides. Maximal interaction was observed to a mixture of GM1 and GD1b, but the antibodies also showed –Barré syndrome. All the immunized animals developed immunoglobulin G immunoreactivity to GM1 ganglioside. In a few (4 of 27) animals, an additional anti-ganglioside antibody population showing an unusual binding behavior was detected. Enzyme-linked immunosorbent assay and thin-layer chromatography immunostaining analyses showed that the binding of these unusual antibodies required the presence of two co-localized gangliosides. Maximal interaction was observed to a mixture of GM1 and GD1b, but the antibodies also showed “density-dependent” binding to GD1b. The antibodies were purified by affinity chromatography and displayed the ability to target antigens in biological membranes (rat synaptosomes). ability to target antigens in biological membranes (rat synaptosomes). purified by affinity chromatography and displayed the ability to target antigens in biological membranes (rat synaptosomes). ability to target antigens in biological membranes (rat synaptosomes). density-dependent” binding to GD1b. The antibodies were purified by affinity chromatography and displayed the ability to target antigens in biological membranes (rat synaptosomes). ability to target antigens in biological membranes (rat synaptosomes). fied by affinity chromatography and displayed the ability to target antigens in biological membranes (rat synaptosomes).