Genetically modified antibody composition

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 16/46 (2006.01) A61K 39/395 (2006.01) C12N 5/10 (2006.01) C12N 15/09 (2006.01) C12P 21/08 (2006.01)

Patent

CA 2616256

A human IgG1 antibody having the substitution of a polypeptide including a CH2 domain present in the Fc region by a polypeptide comprising an amino acid sequence corresponding to the amino acid sequence present at the same position as numbered according to the EU index as in Kabat et al. in a human IgG3 antibody; a genetically modified antibody composition having a higher complement-dependent cytotoxic activity than a human IgG3 antibody; an antibody molecule contained in the genetically modified antibody composition; DNA encoding the heavy-chain constant region of the antibody molecule; a transformant produced by introducing the DNA into a host cell; a method for production of a genetically modified antibody composition using the transformant; and a pharmaceutical comprising the genetically modified antibody composition as an active ingredient.

Anticorps IgG1 humain ayant un polypeptide comprenant un domaine CH2 présent dans la région Fc remplacé par un polypeptide comprenant une séquence d'acides aminés correspondant à la séquence d'acides aminés présente dans un anticorps IgG3 humain à la même position que celle que numérotée selon l'index EU de Kabat et al. ; composition d'anticorps génétiquement modifié ayant une activité cytotoxique dépendante du complément supérieure à celle d'un anticorps IgG3 humain ; molécule d'anticorps contenue dans la composition d'anticorps génétiquement modifié ; ADN codant pour la région constante de la chaîne lourde de la molécule d'anticorps ; transformant produit en introduisant l'ADN dans une cellule hôte ; procédé pour la production d'une composition d'anticorps génétiquement modifié utilisant le transformant ; et produit pharmaceutique comprenant la composition d'anticorps génétiquement modifié comme ingrédient actif.

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