Antiganglioside antibodies in polyneuropathy associated with monoclonal gammopathy

Antibody reactivity to GA1, GM1, GM2, GD1a, GD1b, and GQ1b gangliosides was measured in 87 patients with polyneuropathy associated with monoclonal gammopathy (60 IgM, 25 IgG, 2 IgA) and 42 control patients with monoclonal gammopathy without polyneuropathy (21 IgM, 21 IgG). Of these 87 patients, 30% had anti-myelin-associated glycoprotein antibodies and 15% had antiganglioside antibodies. Antiganglioside antibodies were significantly associated with demyelinating neuropathy and with IgM monoclonal gammopathy. Anti-GD1b and anti-GQ1b antibodies were significantly associated with predominantly sensory ataxic neuropathy.

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