Precursors of catalytic antibodies

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/62 (2006.01) A61K 39/385 (2006.01) A61K 39/39 (2006.01) A61K 39/395 (2006.01) A61K 39/44 (2006.01) C07K 14/195 (2006.01) C07K 14/475 (2006.01) C07K 16/00 (2006.01) C07K 16/28 (2006.01) C07K 16/42 (2006.01) C07K 19/00 (2006.01) C12N 9/00 (2006.01) C12N 9/36 (2006.01) C12N 9/96 (2006.01) C12N 15/13 (2006.01) C12N 15/31 (2006.01)

Patent

CA 2249455

The invention is directed to growth factors or precursors of catalytic antibodies comprising a B-cell surface molecule binding portion, which can induce B-cell mitogenesis. The preferred B-cell surface molecule binding portions are the immunoglobulin binding molecules of protein L from peptostreptococcus magnus, protein A, protein G and protein H. The growth factor having an ability to induce B-cell mitogenesis can be further linked to a target antigen to which catalytic antibodies are sought. B-cell mitogenesis is then dependent on the catalytic cleavage of the antigen portion of the growth factor by catalytic antibodies on the surface of B cells. The method of the present invention is useful for generating catalytic antibodies for both therapeutic and diagnostic purposes.

L'invention concerne des facteurs de croissance de précurseurs d'anticorps catalytiques comprenant une fraction de liaison de molécules à la surface de cellules B pouvant conduire à une mitogenèse des cellules B. Le fraction privilégiée de liaison de molécules à la surface des cellules B est constituée des molécules de liaison de l'immunoglobuline de la protéine L provenant de Peptostreptococcus magnus, de la protéine A, de la protéine G et de la protéine H. Le facteur de croissance susceptible de conduire à une mitogenèse des cellules B peut également être lié à un antigène cible contre lequel on recherche des anticorps catalytiques. La mitogenèse des cellules B dépend alors de la segmentation catalytique de la fraction antigène du facteur de croissance par des anticorps catalytiques à la surface des cellules B. La technique relevant de la présente invention est utile pour produire des anticorps catalytiques à des fins thérapeutiques et diagnostiques.

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