Anti-rhesus d recombinant polyclonal antibody and methods of...

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 16/34 (2006.01) A61K 39/395 (2006.01)

Patent

CA 2574062

The invention relates to a method for manufacturing an anti-RhD recombinant polyclonal antibody composition (anti-RhD rpAb). The method comprises obtaining a collection of cells transfected with a library of anti-RhD antibody expression vectors, wherein each cell in the collection is capable of expressing from a VH and VL comprising nucleic acid segment, one member of the library, which encodes a distinct member of anti-RhD recombinant polyclonal antibody composition and which is located at the same site in the genome of individual cells in said collection. The cells are cultured under suitable conditions for expression of the recombinant polyclonal antibody, which is obtained from the cells or culture supernatant. The nucleic acid segments encoding the anti-RhD rpAb is introduced into the cells by transfection with a library of vectors for site-specific integration. The present method is suitable for manufacturing anti-RhD rpAb, thereby making available a superior replacement of plasma-derived prophylactic and therapeutic immonoglobulin products.

L'invention concerne un procédé de production d'une composition d'anticorps polyclonal recombiné anti-RhD (rpAb anti-RhD). Le procédé consiste à obtenir une collection de cellules transfectées à l'aide d'une bibliothèque de vecteurs d'expression d'anticorps anti-RhD, dans laquelle chaque cellule dans la collection est capable d'exprimer à partir d'un segment d'acide nucléique contenant VH et VL, un élément de la bibliothèque, lequel code un élément distinct d'une composition d'anticorps polyclonal recombiné anti-RhD et qui se trouve sur le même site dans le génome de cellules individuelles dans ladite collection. Les cellules sont mises en culture dans des conditions appropriées à l'expression de l'anticorps polyclonal recombiné, lequel est obtenu à partir des cellules ou du surnageant de culture. Les segments d'acide nucléique codant le rpAb anti-RhD sont introduits dans les cellules par transfection à l'aide d'une bibliothèque de vecteurs pour l'intégration spécifique à un site. Le procédé de l'invention convient à la production de rpAb anti-RhD, permettant ainsi un remplacement supérieur de produits d'immunoglobuline prophylactiques et thérapeutiques dérivés du plasma.

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