Cd40cr receptor and ligands therefor

C - Chemistry – Metallurgy – 12 – P

Patent

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Details

C12P 21/08 (2006.01) A61K 38/16 (2006.01) A61K 39/395 (2006.01) A61K 47/48 (2006.01) C07K 14/705 (2006.01) C07K 16/28 (2006.01) C07K 19/00 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2089229

The present invention relates to a counter--receptor, termed CD40CR, for the CD40 B-cell antigen, and to soluble ligands for this receptor, including fusion molecules comprising at least a portion of CD40 protein. It is based, at least in part, on the discovery that a soluble CD40/immunoglobulin fusion protein was able to inhibit helper T-cell mediated B- cell activation by binding to a novel 39 kD protein receptor on helper T-cell membranes. The present invention provides for a substantially purified CD40CR receptor; for soluble ligands of CD40CR, including antibodies as well as fusion molecules comprising at least a portion of CD40 protein; and for methods of controlling B-cell activation which may be especially useful in the treatment of allergy or autoimmune disease.

La présente invention concerne un récepteur-compteur, appelé CD40CR, pour l'antigène de cellule B CD40 et des ligands solubles pour le récepteur, y compris des molécules de fusion comprenant au moins une portion de la protéine CD40. L'invention repose, du moins en partie, sur la découverte qu'une protéine de fusion soluble CD40/immunoglobuline peut inhiber l'activation de cellule B de lymphocyte T auxiliaire en joignant un nouveau récepteur de protéine 39 kD aux membranes de lymphocyte T auxiliaire. La présente invention prévoit un récepteur CD40CR substantiellement purifié; des ligands solubles de CD40CR, y compris des anticorps ainsi que des molécules de fusion composées d'au moins une portion de protéine CD40; et des méthodes de contrôle de l'activation de cellule B, ce qui peut s'avérer particulièrement utile dans le traitement d'allergies ou de maladies autoimmunes.

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