Aav vector compositions and methods for enhanced expression...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/864 (2006.01) C12N 15/13 (2006.01) A01K 67/027 (2006.01)

Patent

CA 2573656

Single AAV vector constructs for expression of an immunoglobulin molecule or fragment thereof and methods of making and using the same are described. The AAV vectors comprise a self-processing cleavage sequence between a first and second immunoglobulin coding sequence allowing for expression of a functional antibody molecule using a single promoter. The vector constructs may further include an additional proteolytic cleavage sequence which provides a means to remove the self processing peptide sequence from an expressed immunoglobulin molecule or fragment thereof. The vector constructs find utility in enhanced production of biologically active immunoglobulins or fragments thereof in vitro and in vivo.

Il est décrit des constructions de vecteurs AAV uniques pour l'expression d'une molécule d'immunoglobuline ou d'un fragment de celle-ci et des procédés de fabrication et d'utilisation de celles-ci. Les vecteurs AAV comprennent une séquence d'auto-clivage entre une première et une seconde séquences codant pour l'immunoglobuline permettant l'expression d'une molécule d'anticorps fonctionnelle en utilisant un seul promoteur. Les constructions de vecteurs peuvent en plus comprendre une séquence de clivage protéolytique supplémentaire laquelle procure des moyens pour enlever la séquence peptidique agissant sur elle-même d'une molécule d'immunoglobuline exprimée ou d'un fragment de celle-ci. Les constructions de vecteurs trouvent leur utilité dans la production accrue d'immunoglobulines biologiquement actives ou de fragments de celles-ci in vitro et in vivo.

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