CIQUIBIC   05472
CENTRO DE INVESTIGACIONES EN QUIMICA BIOLOGICA DE CORDOBA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Ganglioside complexes: autoantibody targets in a rabbit model of neuropathy
Autor/es:
MOYANO ANA L; COMIN ROMINA; ALANIZ MARÍA E; LARDONE RICARDO D; NORES GUSTAVO A
Lugar:
Mar del Plata, Argentina
Reunión:
Congreso; XLIII Reunión Anual de la Sociedad Argentina de Investigación en Bioquímica y Biología Molecular (SAIB); 2007
Institución organizadora:
Sociedad Argentina de Investigación en Bioquímica y Biología Molecular (SAIB)
Resumen:
Recent
studies showed that some ganglioside complexes (GSCs) are target antigens for
serum antibodies in patients with GuillainBarré syndrome (GBS) and suggested
that anti-GSC antibodies may be involved with particular clinical features of
GBS. Conformational epitopes recognized by these antibodies may be present in
neuronal plasma membranes where gangliosides reside clustered in functional
microdomains. Consequently, binding of antibodies to GSCs are likely to cause
nerve dysfunction. In this study,we induced an experimental neuropathy
(resembling GBS) by sensitization of rabbits with bovine brain gangliosides
according to the procedure of Yuki et al. (Ann. Neurol. (2001) 49: 712). Rabbit
serum samples were obtained on the acute-phase of neurological symptoms and screened
for immunoreactivity against glycolipids (GA1, GM1, GD1b, GD1a and GD1b) by
thin layer chromatography immunostaining. All serum samples displayed typical
IgGantibodies against GA1, GM1 and GD1b . In addition to this reactivity, they
also showed IgG-reactivity against GM1/GD1b, GM1/GD1a and GM1/GT1b complexes. These
results are the first description of experimental induction of this type of
antibodies and provide new evidences about the role of anti-GSCs antibodies in
the development of neuropathies.