A method for the production of a monoclonal antibody to cd20...

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 16/28 (2006.01)

Patent

CA 2609731

The present invention relates to the recombinant method used for the production of soluble form of an antibody that binds to CD20 for treatment of patients with relapsed or refractory, low-grade or follicular, CD20-positive, B-cell non-Hodgkin's lymphoma (NHL). The treatment will comprise the use of immunologically active anti-CD20 antibodies; or radiolabeled anti-CD20 antibodies and or cooperative strategies where both labeled and non-labeled antibodies will be used for treatment of NHL. The procedure describes the de novo synthesis of the nucleic acid sequence encoding anti-CD20, transformation of the constructed nucleic acid sequences into competent bacteria and the sub- cloning of the same into mammalian expression vectors for expression of the desired protein. DNA constructs comprising the control elements associated with the gene of interest has been disclosed. The nucleic acid sequence of interest has been codon optimized to permit expression in the suitable mammalian host cells.

L'invention concerne une méthode recombinante utilisée pour la production d'une forme soluble d'un anticorps se liant à CD20 pour traiter des patients atteints d'un lymphome non-Hodgkinien (NHL) à cellules B CD20-positif, récurrent ou réfractaire, folliculaire ou de faible importante. Le traitement de l'invention consiste à utiliser des anticorps anti-CD20 immunologiquement actif; ou des anticorps anti-CD20 radiomarqués et/ou des stratégies coopératives dans lesquelles des anticorps à la fois marqués et non marqués sont utilisés pour traiter le NHL. La méthode de l'invention décrit la synthèse de novo de la séquence d'acide nucléique codant un anti-CD20, la transformation de ces séquences d'acide nucléique construites en bactéries compétentes, et le sous-clonage de celles-ci en vecteurs d'expression de mammifères pour exprimer la protéine voulue. Les constructions d'ADN comprenant les éléments de commande associés au gène de l'invention sont décrites. La séquence d'acide nucléique de l'invention a été optimisée au niveau de ses codons pour permettre son expression dans des cellules hôtes de mammifères appropriées.

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