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- W2079010677 abstract "Glycans are a class of molecules with high structural variability, frequently found in the plasma membrane facing the extracellular space. Because of these characteristics, glycans are often considered as recognition molecules involved in cell social functions, and as targets of pathogenic factors. Induction of anti-glycan antibodies is one of the early events in immunological defense against bacteria that colonize the body. Because of this natural infection, antibodies recognizing a variety of bacterial glycans are found in sera of adult humans and animals. The immune response to glycans is restricted by self-tolerance, and no antibodies to self-glycans should exist in normal subjects. However, antibodies recognizing structures closely related to self-glycans do exist, and can lead to production of harmful anti-self antibodies. Normal human sera contain low-affinity anti-GM1 IgM-antibodies. Similar antibodies with higher affinity or different isotype are found in some neuropathy patients. Two hypotheses have been developed to explain the origin of disease-associated anti-GM1 antibodies. According to the “molecular mimicry” hypothesis, similarity between GM1 and Campylobacter jejuni lipopolysaccharide carrying a GM1-like glycan is the cause of Guillain–Barré syndrome associated with anti-GM1 IgG-antibodies. According to the “binding site drift” hypothesis, IgM-antibodies associated with disease originate through changes in the binding site of normally occurring anti-GM1 antibodies. We now present an “integrated” hypothesis, combining the “mimicry” and “drift” concepts, which satisfactorily explains most of the published data on anti-GM1 antibodies." @default.
- W2079010677 created "2016-06-24" @default.
- W2079010677 creator A5012593800 @default.
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- W2079010677 creator A5067640282 @default.
- W2079010677 creator A5090553043 @default.
- W2079010677 date "2008-03-01" @default.
- W2079010677 modified "2023-10-09" @default.
- W2079010677 title "Anti-GM1 antibodies as a model of the immune response to self-glycans" @default.
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