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

ANA L. MOYANO; A. ALEJANDRO VILCAES; GERMAN A. ROTH; FERNANDO J. IRAZOQUI; GUSTAVO A. NORES

OXFORD UNIV PRESS INC

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

mmunization 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 “density-dependent” binding to GD1b. The antibodies were purified by affinity chromatography and displayed the ability to target antigens in biological membranes (rat synaptosomes).