Attenuated strains of mycobacteria

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 1/20 (2006.01) A61K 39/04 (2006.01) C07K 14/35 (2006.01) C12N 15/31 (2006.01) A61K 39/00 (2006.01)

Patent

CA 2316412

Attenuated strains of Mycobacterium, particularly species of the tuberculosis complex, have the mycobacterial cell entry (mce) gene functionally disabled. The gene may be disabled by an insertion into the gene which disrupts the mycobacterial cell entry function thereof of a selectable marker which is used for screen for homologous recombinants in which a double cross-over event has been effected. The attenuated strains may be used in the immunization of hosts against Mycobacterium disease.

L'invention concerne des souches atténuées de Mycobacterium, en particulier une espèce du complexe de la tuberculose, dont le gène de l'entrée de cellule mycobactérienne (mce) est fonctionnellement désactivé. Ce gène peut être désactivé par une insertion dans le gène, laquelle insertion interrompt la fonction de l'entrée de cellule mycobactérienne d'un marqueur séléctionnable qui est utilisé pour cribler des éléments recombinés homologues que l'on a soumis à un événement de double croisement. Les souches atténuées peuvent être utilisées dans l'immunisation d'hôtes contre des maladies à Mycobacterium.

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