Abstract:
:IgM anti-GM1 antibodies are associated with motor neuropathy syndromes, including multifocal motor neuropathy (MMN). We compared the ability of serum IgM from patients with multifocal motor neuropathy to bind to GM1 ganglioside alone and to GM1 as a component of a lipid mixture that also contained galactocerebroside and cholesterol (GGC). Our results showed that high-titer selective serum IgM binding to GGC has strong specificity for MMN. Further, over 40% more serums from patients with MMN have high-titer serum IgM binding to GGC than to GM1 alone. The specific composition and structure of the lipid mixture altered the ability of serum IgM to bind to GM1 ganglioside. Substitutions of other lipids for galactocerebroside or cholesterol could completely inhibit the antibody binding. We conclude that serum IgM anti-GGC autoantibodies have specificity for MMN and their binding is strongly influenced by the lipid environment of GM1 ganglioside.
journal_name
Neurologyjournal_title
Neurologyauthors
Pestronk A,Choksi R,Blume G,Lopate Gdoi
10.1212/wnl.48.4.1104subject
Has Abstractpub_date
1997-04-01 00:00:00pages
1104-6issue
4eissn
0028-3878issn
1526-632Xjournal_volume
48pub_type
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