Natural human antibodies to amyloid beta peptide

Paul Szabo, Norman Relkin, Marc E Weksler
Autoimmunity Reviews 2008, 7 (6): 415-20
Properties of human, natural anti-Abeta antibodies and commercially available intravenous immunoglobulin (IVIg) have been examined in light of the beneficial effects of passive immunotherapy with IVIg for patients with mild to moderate Alzheimer's disease (AD). Anti-Abeta antibodies in IVIg recognize conformation-specific epitopes as well as linear epitopes from different regions of the Abeta peptide. Anti-Abeta antibodies in circulation, especially those with high avidity, are often masked by ligands and the avidity of these antibodies increases upon dissociation of the bound ligands from the antibodies. Such natural anti-Abeta antibodies have the capacity to prevent Abeta oligomer-induced neurotoxicity in N2A neuroblastoma cells. This neuro-protective effect may reflect the therapeutic potential of the natural anti-Abeta antibodies found in IVIg for the treatment of patients with AD.

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