Methods of virus production

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 7/00 (2006.01) A61K 39/23 (2006.01) C12N 7/02 (2006.01) C12N 15/861 (2006.01) C12Q 1/70 (2006.01)

Patent

CA 2478901

A simple yet effective method of increasing production of a thermo-stable virus, such as adenovirus and picornavirus, is presented. The method entails a temperature shift strategy whereby the culture of host cells are shifted to a sub-optimal temperature for a period of time prior to virus infection or cells are grown at a sub-optimal level for the entire cell expansion process including one or more than one passages of cell growth from cryopreserved cells, followed by a shift back to a more optimal temperature at or near the time of virus infection of the respective host cells. Adaptation of such a temperature shift strategy present a simple yet effective method to substantially increase recoverable virus within a respective host cell/virus production scheme without the need to further manipulate other culture and/or media conditions within an established host cell / virus production scheme.

La présente invention concerne un procédé de production simple mais cependant efficace d'un virus thermostable, tel qu'un adénovirus ou un picornavirus. Le procédé comprend une stratégie de variation de la température de sorte que la culture de cellules hôtes soit amenée à une température sous-optimale pendant une certaine durée avant l'infection virale ou bien que les cellules soient cultivées à un niveau sous-optimal pendant tout le processus de croissance cellulaire comprenant au moins un des passages de la croissance cellulaire à partir de cellules cryopréservées, suivi par un retour à une température plus optimale plus ou moins au moment de l'infection virale des cellules hôtes respectives. L'adaptation d'une telle stratégie de variation de la température constitue un procédé simple mais cependant efficace d'augmentation substantielle de virus récupérables dans un programme de production de virus/cellules hôtes respectives sans qu'il soit nécessaire de manipuler d'autres conditions de culture et/ou de milieux dans un programme de production établi de virus/cellules hôtes.

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