Adenovirus particles with mutagenized fiber proteins

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/861 (2006.01) A61K 39/235 (2006.01) C07K 14/015 (2006.01) C07K 14/075 (2006.01) C12N 15/35 (2006.01) A61K 48/00 (2006.01)

Patent

CA 2410981

This invention relates to mutated adenoviral fiber proteins and adenovirus particles containing such proteins. It further relates to polynucleotides encoding the proteins and vectors containing polynucleotides. It also relates to methods for making and using the adenoviral particles. With the mutated fiber proteins, the adenovirus particles no longer bind to their natural cellular receptor. They can then be "retargeted" to a specific cell type through the addition of a ligand to the virus capsid, which causes the virus to bind to and infect such cell. Specific fiber mutations are listed, which ablate binding to the natural receptor. Adenovirus particles with certain fiber mutations were found to enhance gene transfer to and expression in liver as compared to viral particles with wild-type fiber.

Cette invention se rapporte à des protéines de fibres adénovirales mutées et à des particules d'adénovirus contenant ces protéines, à des polynucléotides codant ces protéines et à des vecteurs contenant ces polynucléotides, ainsi qu'à des procédés de production et d'utilisation de ces particules adénovirales. Grâce à ces protéines de fibres mutées, les particules d'adénovirus ne se fixent plus à leur récepteur cellulaire naturel. Elles peuvent être alors reciblées sur un type de cellule spécifique grâce à l'addition d'un ligand au capside du virus, qui amène le virus à se fixer à une telle cellule et à l'infecter. On a établi la liste des mutations de fibres spécifiques qui suppriment la fixation au récepteur naturel. On a découvert que des particules d'adénovirus ayant certaines mutations de fibres augmentent le transfert génique et l'expression dans le foie par rapport à des particules virales ayant une fibre de type sauvage.

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