Abstract: The invention relates to a method for the preparation of a stable, soluble amyloid beta (A?) oligomer and composition thereof for use as an antigen for the generation of antibodies for the treatment of Alzheimer's disease and other conditions related to abnormal amyloid beta aggregation. The method which uses a pH in excess of 7.0 and high concentrations of A?, optionally includes the use of divalent anions or a helix-inducing solvent to form the oligomers. The stable, soluble A? oligomers produced by the method herein have a particle size of 10 to 100 nm in diameter, when measured by a dynamic light scattering technique, and a molecular weight of 100 to 500 kDa.

Abstract: The invention relates to a method for the preparation of a stabilized cross-linked oligomer of amyloid beta using a near-zero length bifunctional cross-linking agent for use as an immunogen for the generation of antibodies for the treatment of Alzheimer's Disease and other conditions related to abnormal amyloid beta aggregation. A preferred bifunctional cross-linking agent is 1,5-difluoro-2,4-dinitrobenzene (DFDNB).