Bcl-2-modifying factor (bmf) sequences and their use in...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/12 (2006.01) A61K 38/17 (2006.01) A61K 39/395 (2006.01) A61K 48/00 (2006.01) C07K 14/435 (2006.01) C07K 14/47 (2006.01) C07K 16/18 (2006.01) C12N 15/11 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2449000

The present invention relates generally to novel molecules capable of, inter alia, modulating apoptosis in mammalian cells and to genetic sequences encoding same. More particularly, the present invention relates to a novel member of the Bcl-2 family of proteins, referred to herein as "Bmf", and to genetic sequences encoding same and to regulatory sequences such as a promoter sequence directing expression of Bmf. Bmf comprises a BH3 domain which facilitates interaction to pro-survival Bcl-2 family members thereby triggering apoptosis. Bmf is regarded, therefore, as a BH3-only molecule. The molecules of the present invention are useful, for example, in therapy, diagnosis, antibody generation and as a screening tool for therapeutic agents capable of modulating physiological cell death or survival and/or modulating cell cycle entry. The present invention further contemplates genetically modified animals in which one or both alleles of Bmf are mutated or partially or wholly deleted alone or in combination with a mutation in one or both alleles of another Bcl-2-type molecule such as but not limited to Bim. The genetically modified animals are useful inter alia in screening for agents which ameliorate the symptoms of diseases caused by defects in apoptosis or which specifically promote apoptosis of target cells.

L'invention concerne, d'une manière générale, des nouvelles molécules capables de moduler, <i>inter alia</i>, l'apoptose dans des cellules mammifères et des séquences génétiques codant celles-ci. Plus précisément, l'invention concerne un nouveau membre de la famille Bcl-2 de protéines, désigné par "Bmf", ainsi que des séquences génétiques codant celui-ci et des séquences régulatrices, telles qu'une séquence de promoteur, dirigeant l'expression de Bmf. Bmf comprend un domaine BH3 facilitant l'interaction avec des membres de la famille Bcl-2 pro-survie, déclenchant ainsi l'apoptose. Bmf est considéré, par conséquent, comme une molécule de BH3 uniquement. Les molécules selon l'invention sont utiles, par exemple, pour la thérapie, le diagnostic, la génération d'anticorps et comme outil de criblage d'agents thérapeutiques capables de moduler la mort ou survie de cellules physiologiques et/ou de moduler l'entrée en cycle cellulaire. L'invention concerne également des animaux génétiquement modifiés dans lesquels un ou les deux allèles de Bmf sont mutés ou partiellement ou entièrement effacés uniquement ou en combinaison avec une mutation dans un ou les deux allèles d'une autre molécule de type Bcl-2, telle que, mais sans caractère restrictif, Bim. Les animaux génétiquement modifiés sont utiles <i>inter alia</i> pour le criblage d'agents améliorant les symptômes de maladies induites par des anomalies de l'apoptose ou favorisant de manière spécifique l'apoptose de cellules cibles.

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