Scfv antibodies which pass epithelial and/or endothelial layers

Details Scfv antibodies which pass epithelial and/or endothelial layers Scfv antibodies which pass epithelial and/or endothelial layers

A - Human Necessities

61

K

A61K 39/395 (2006.01) A61P 19/02 (2006.01) A61P 27/02 (2006.01) C07K 16/24 (2006.01) A61K 9/08 (2006.01) C07K 16/22 (2006.01)

Patent

CA 2658241

scFv antibodies which specifically bind selected antigens and are obtainable by a method comprising (i) selecting from a pool of soluble and stable antibody frameworks a soluble and stable framework matching best the framework of a non-human antibody against the antigen with a certain binding specificity, (ii) either providing said soluble and stable framework with CDRs that bind specifically to said antigen, or mutating the framework of said non-human antibody towards the sequence of said soluble and stable framework, to generate scFv antibodies, (iii) testing the generated antibody for solubility and stability, and testing the generated antibody for antigen binding, and (iv) selecting an scFV that is soluble, stable and binds to the antigen specifically. Also provided are pharmaceutical compositions comprising said scFv antibody, methods of treatment and diagnosis for diseases related to over expression of antigens that are specifically bound by said antibody.

L'invention concerne des anticorps scFv qui se lient spécifiquement à des antigènes sélectionnés et peuvent être obtenus par un procédé comprenant (i) la fait de choisir parmi un pool de structures d'anticorps stables et solubles, une structure stable et soluble correspondant au mieux à la structure d'un anticorps non humain contre l'antigène avec une certaine spécificité de liaison, (ii) le fait de soit doter ladite structure stable et soluble avec des CDRs qui se lient spécifiquement audit antigène, soit de muter la structure dudit anticorps non humain vers la séquence de ladite structure stable et soluble, afin de générer des anticorps scFv, (iii) le fait de tester l'anticorps généré quant aux propriété de solubilité et stabilité, et le fait de tester l'anticorps généré quant aux propriétés de liaison antigénique, et (iv) le fait de sélectionner un scFV qui est soluble et stable, et qui se lie spécifiquement à l'antigène. L'invention concerne également des compositions pharmaceutiques comprenant ledit anticorps scFv, des procédés de traitement et de diagnostic de pathologies liées à la surexpression des antigènes qui sont spécifiquement liés par ledit anticorps.

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