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Amyloid beta(1-42) oligomers, derivatives thereof and antibodies thereto, methods of preparation thereof and use thereof

  • US 9,176,150 B2
  • Filed: 08/01/2011
  • Issued: 11/03/2015
  • Est. Priority Date: 01/31/2003
  • Status: Expired due to Term
First Claim
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1. An isolated antibody which binds an N-terminal truncated amyloid-β

  • (“





    )(1-42) oligomer comprising an Aβ

    (X-42) fragment, wherein X is 10 to 24, the isolated antibody obtainable by a method comprising;

    a) immunizing a host with the N-terminal truncated Aβ

    (1-42) oligomer; and

    b) obtaining an antibody-containing host serum produced as a response to said immunization,wherein the isolated antibody binds the N-terminal truncated Aβ

    (1-42) oligomer with 10-fold greater affinity than an amyloid derived, diffusible and dementing ligand (ADDL),wherein the N-terminal truncated Aβ

    (1-42) oligomer is produced by a process comprising;

    i) exposing a monomeric Aβ

    (1-42) protein to a detergent to form an intermediate oligomer;

    ii) reducing the detergent action and further incubating the intermediate oligomer to form an Aβ

    (1-42) oligomer; and

    iii) treating the Aβ

    (1-42) oligomer with a protease to form the N-terminal truncated Aβ

    (1-42) oligomer,wherein the detergent is a compound of formula R—

    X, wherein the radical R is unbranched or branched alkyl having from 6 to 20 carbon atoms or unbranched or branched alkenyl having from 6 to 20 carbon atoms, and the radical X is an acidic group or salt thereof.

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