Less immunogenic binding molecules

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 16/28 (2006.01) A61K 39/395 (2006.01) A61P 31/00 (2006.01) A61P 33/00 (2006.01) A61P 35/00 (2006.01) A61P 37/00 (2006.01) C07K 16/30 (2006.01) C07K 16/46 (2006.01)

Patent

CA 2555503

The present invention provides a bispecific binding molecule, wherein said molecule comprises or consists of at least two domains whereby one of said at least two domains specifically binds to/interacts with the human CD3 complex and said domain comprises an amino acid sequence of an antibody derived light chain, wherein said amino acid sequence is a particularly identified amino acid sequence comprising specific amino acid substitutions, and a second domain is or contains at least one further antigen-interaction-site and/or at least one further effector domain. The invention further provides nucleic acid molecules encoding the bispecific binding molecules of the invention, vectors comprising said nucleic acid molecules and host cells transformed or transfected with said vectors. Moreover, the invention concerns a method for the production of bispecific binding molecules of the invention and compositions comprising the bispecific binding molecules of the invention, the nucleic acid molecules of the invention or the host cells of the invention.

L'invention concerne une molécule de liaison bispécifique comportant au moins deux domaines dont au moins un se lie spécifiquement ou interagit avec le complexe CD3 humain et comprend une séquence d'acides aminés d'une chaîne légère dérivée d'un anticorps. Ladite séquence d'acides aminés est une chaîne d'acides aminés particulièrement identifiée, comprenant des substitutions aminoacides spécifiques. Le deuxième domaine de ladite molécule contient au moins un autre site d'interaction avec l'antigène et/ou au moins un autre domaine effecteur. L'invention porte sur des molécules d'acide nucléique codant pour les molécules de liaison bispécifiques de l'invention, sur des vecteurs comprenant lesdites molécules d'acide nucléique et sur des cellules hôtes transformées ou transfectées avec lesdits vecteurs. De plus, l'invention se rapporte à un procédé de production desdites molécules de liaison bispécifiques de l'invention, à des compositions comprenant les molécules de liaison bispécifiques de l'invention, les molécules d'acide nucléique de l'invention ou les cellules hôtes de l'invention.

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