title: Fine specificities of anti-LM1 IgG antibodies in Guillain-Barré syndrome.
abstract: We investigated the prevalence of anti-LM1 IgG antibody and its fine specificity in Guillain-Barré syndrome (GBS). Anti-LM1 IgG and IgM antibodies from sera of 47 patients with GBS--19 with acute inflammatory demyelinating polyneuropathy (AIDP), 27 with acute motor axonal neuropathy (AMAN), and 1 with acute motor-sensory axonal neuropathy (AMSAN)--were tested. Anti-LM1 IgG antibody was detected in only one patient with AIDP, whereas it was present in seven with AMAN and in one with AMSAN. Sera from the eight IgG anti-LM1-positive patients with AMAN/AMSAN also had IgG activity against the gangliosides GM1, GM1b, GD1a, GalNAc-GD1a, GD1b, or GQ1b. Anti-LM1 IgG antibodies from the AMAN/AMSAN patients cross-reacted with other gangliosides, whereas IgG antibody from the AIDP patient was monospecific against LM1. Anti-LM1 IgG antibody therefore, cannot be a marker of AIDP. In addition, whether monospecific anti-LM1 IgG antibody is associated with AIDP remains to be concluded. Larger studies are needed to verify whether monospecific anti-LM1 IgG antibody could be a marker of AIDP.
authors.affiliation: Department of Neurology, Dokkyo University School of Medicine, Kitakobayashi 880, Mibu, Shimotsuga, 321-0293, Tochigi, Japan.
authors.forename: Keiichiro
authors.initials: K
authors.lastname: Susuki
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Yuki
authors.forename: Koichi
authors.initials: K
authors.lastname: Hirata
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kuwabara
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000918:Antibody Specificity / Q000276:immunology*; D001369:Axons / Q000276:immunology / Q000473:pathology; D015415:Biomarkers / Q000097:blood; D002490:Central Nervous System / Q000276:immunology* / Q000503:physiopathology; D005260:Female; D005732:Gangliosides / Q000276:immunology*; D020275:Guillain-Barre Syndrome / Q000097:blood* / Q000175:diagnosis / Q000276:immunology*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood* / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D009046:Motor Neurons / Q000276:immunology / Q000473:pathology
chemical_list: D015415:Biomarkers; D005732:Gangliosides; D007074:Immunoglobulin G; C036208:LM1 ganglioside