Eph receptor fc variants with enhanced antibody dependent...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 16/00 (2006.01) A61K 39/395 (2006.01) C12P 21/04 (2006.01) C12P 21/08 (2006.01) C07K 1/00 (2006.01) C07K 14/00 (2006.01)

Patent

CA 2577329

The present invention relates to novel Fc variants that immuno-specifically bind to an Eph receptor. The Fc variants comprise a binding region that immunospecifically binds to an Eph receptor and an Fc region that further comprises at least one novel amino acid residue which may provide for enhanced effector function. More specifically, this invention provides Fc variants that have modified binding affinity to one or more Fc ligand (e.g., Fc.gamma.R, C1q). Additionally, the Fc variants have altered antibody-dependent cell- mediated cytotoxicity (ADCC) and/or complement dependent cytotoxicity (CDC) activity. The invention further provides methods and protocols for the application of said Fc variants that immunospecifically bind to an Eph receptor, particularly for therapeutic purposes.

La présente invention concerne de nouveaux variants Fc qui se lient de manière immuno-spécifique à un récepteur EPH. Les variants Fc comprennent une région de liaison qui se lie de manière immuno-spécifique à un récepteur EPH, et une région Fc qui comprend au moins un nouveau résidu d'acide aminé pouvant accomplir une fonction effectrice améliorée. L'invention concerne plus particulièrement des variants Fc présentant une affinité de liaison modifiée pour un ou plusieurs ligands Fc (p. ex. Fc?R, C1q). De plus, les variants Fc présentent une cytotoxicité cellulaire dépendant des anticorps (ADCC) altérée et/ou une cytotoxicité cellulaire dépendant du complément (CDC). L'invention concerne en outre des méthodes et des protocoles d'application des variants Fc liés de manière immuno-spécifique au récepteur EPH, notamment à des fins thérapeutiques.

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