Monoclonal antibodies specific for different epitopes of...

C - Chemistry – Metallurgy – 12 – N

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Details

C12N 15/13 (2006.01) A61K 39/395 (2006.01) A61K 47/48 (2006.01) A61K 49/00 (2006.01) A61K 51/10 (2006.01) C07K 14/705 (2006.01) C07K 16/28 (2006.01) C07K 16/46 (2006.01) C07K 19/00 (2006.01) C12N 5/18 (2006.01) G01N 33/554 (2006.01) G01N 33/577 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2210419

The present invention provides monoclonal antibodies, antigen binding fragment and recombinant binding proteins specific for human gp39. These antibodies are specific for at least 12 different epitopes on gp39. Hybridomas secreting specific antibodies which bind to these epitopes are also provided. Further, the present invention discloses the amino acid sequence of immunoglobulin light and heavy chain variable regions which bind to epitopes of gp39 and provide sFv and humanized antibodies which bind gp39. Also, provided are pharmaceutical compositions comprising the monoclonal antibodies, antigen binding fragments and recombinant binding proteins which bind gp39 and methods for using these compositions in diagnosing disease states, inhibiting B cell activation and for treating immunological disorders, such as autoimmune diseases, allergic responses, organ rejection and graft-versus-host disease. Antibodies of the present invention can also be used to image cells which express gp39 on their surface, such as tumor cells (e.g., lymphoma) and to target therapeutic agents to target cells.

La présente invention concerne des anticorps monoclonaux, des fragments de liaison à l'antigène (Fab) et des protéines de liaison recombinantes spécifiques de gp39 humaine. Ces anticorps sont spécifiques d'au moins 12 épitopes différents de gp39. L'invention concerne également des hybridomes sécrétant des anticorps spécifiques se liant à ces épitopes. L'invention concerne aussi la séquence d'acides aminés des régions variables à chaînes légères et lourdes d'immunoglobuline, lesquelles régions variables se lient aux épitopes de gp39 et fournissent le sFv et les anticorps humanisés de liaison de gp39. L'invention concerne enfin des compositions pharmaceutiques comprenant les anticorps monoclonaux, les fragments de liaison à l'antigène (Fab) et les protéines de liaison recombinantes qui se lient à la gp39, ainsi que des procédés d'utilisation de ces compositions pour le diagnostic d'états pathologiques, l'inhibition de l'activation des lymphocytes B et le traitement de troubles immunologiques tels que les maladies auto-immunes, les réactions allergiques, le rejet d'organe et les réactions du greffon contre l'hôte. Les anticorps de la présente invention peuvent également s'utiliser pour l'imagerie des cellules qui expriment la gp39 sur leur surface, et notamment les cellules tumorales telles que les lymphomes, et pour cibler des agents thérapeutiques par rapport à des cellules cibles.

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