title: Antibodies to GD1alpha and to GQ1beta in Guillain-Barré syndrome and the related disorders.
abstract: Certain species of anti-ganglioside antibodies are associated with specific clinical features in various neurologic diseases. Serum autoantibodies to these minor gangliosides were investigated in a number of neurological diseases in order to examine the biological functions of GD1alpha and GQ1beta. Eleven patients with Guillain-Barré syndrome had remarkably high IgG anti-GD1alpha antibody titers, but no GD1alpha was detected in human peripheral nerve. An absorption study showed that IgG anti-GD1alpha antibodies from eight of the 11 patients were significantly absorbed by GD1a and GM1b, indicative that the IgG anti-GD1alpha antibodies cross-react with GD1a and GM1b. Both GD1a and GM1b have been reported to be target molecules for serum antibodies in certain patients with Guillain-Barré syndrome. GD1alpha may induce the production of IgG anti-GD1alpha antibody which cross-reacts with GD1a or GM1b, and subsequently functions in the development of Guillain-Barré syndrome. The IgGs from six patients with Fisher's syndrome who had the anti-GQ1beta antibody had anti-GQ1b activity as well. All the patients had external ophthalmoplegia, but no GQ1beta was detected in the human oculomotor nerve, further evidence that GQ1b, not GQ1beta, is the molecule targeted by the autoantibody in Fisher's syndrome.
authors.affiliation: Department of Neurology, Dokkyo University School of Medicine, Shimotsuga, Tochigi, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Odaka
authors.forename: N
authors.initials: N
authors.lastname: Yuki
authors.forename: H
authors.initials: H
authors.lastname: Yoshino
authors.forename: M
authors.initials: M
authors.lastname: Kiso
authors.forename: H
authors.initials: H
authors.lastname: Ishida
authors.forename: K
authors.initials: K
authors.lastname: Hirata
mesh_terms: D000918:Antibody Specificity; D001323:Autoantibodies / Q000276:immunology; D002855:Chromatography, Thin Layer; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay; D005677:G(M1) Ganglioside / Q000031:analogs & derivatives* / Q000276:immunology / Q000378:metabolism; D005732:Gangliosides / Q000276:immunology / Q000378:metabolism*; D007120:Immunochemistry; D009414:Nerve Growth Factors / Q000276:immunology / Q000378:metabolism*; D009802:Oculomotor Nerve / Q000378:metabolism; D010525:Peripheral Nerves / Q000378:metabolism; D011129:Polyradiculoneuropathy / Q000378:metabolism*
chemical_list: D001323:Autoantibodies; D005732:Gangliosides; D009414:Nerve Growth Factors; C064020:ganglioside GD1alpha; D005677:G(M1) Ganglioside; C039129:GQ1b ganglioside