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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Anti-GM1 IgG antibodies and Campylobacter bacteria in Guillain-Barré syndrome: evidence of molecular mimicry.
Annals of Neurology 1995 August
In Guillain-Barré syndrome antibodies to GM1 and the presence of an antecedent Campylobacter jejuni infection are correlated with a more severe course of the disease. From a group of 137 consecutive GBS patients, 11 sera had elevated titers of anti-GM1 IgG antibodies during the acute stage of disease. Each serum sample was preincubated with three different Penner serotypes of whole C. jejuni (PEN O:4/59, PEN O:41) and Campylobacter coli (PEN O:22) bacteria. The PEN O:4/59 serotype, isolated from the stools of a Guillain-Barré syndrome patient, inhibited 63 to 93% of the anti-GM1 activity in 6 of 11 patients. The PEN O:41 inhibited 63 to 100% of the anti-GM1 antibody activity in 9 of 11 patients. The PEN O:22 inhibited anti-GM1 antibody activity in only 2 of 11 patients (80 and 86%). Two Guillain-Barré syndrome patients did not show antibody absorption by any of the Campylobacter serotypes tested, although this does not exclude the involvement of other serotypes. An Escherichia coli control strain did not significantly absorb anti-GM1 antibodies. The results of this study indicate that anti-GM1 IgG antibodies in Guillain-Barré syndrome sera recognize surface epitopes on whole Campylobacter bacteria and that this recognition is strain-specific. This provides evidence for molecular mimicry in the pathogenesis of Guillain-Barré syndrome.
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