Knock in transgenic mammal containing a non-functional...

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 15/12 (2006.01) A01K 67/00 (2006.01) A01K 67/027 (2006.01) C07K 14/705 (2006.01) C12N 5/00 (2006.01) C12N 5/06 (2006.01) C12N 15/00 (2006.01) C12N 15/09 (2006.01) C12N 15/63 (2006.01) C12N 15/82 (2006.01) C12N 15/85 (2006.01) G01N 33/566 (2006.01)

Patent

CA 2455700

This invention provides a transgenic mammal containing a defective beta 1 subunit (Kvss1) of a voltage sensitive potassium channel, where the Kvss1 subunit is unable to confer N-type inactivation of the K+ but retains the ability to co-associate with Kv1 family a- subunits and thereby enhance channel surface expression. Preferably the Kvss1.1 gene encoding Kvss1 subunit has a mutation in all or a portion of codons 1-70 of its inactivation domain. The transgenic mammal is useful as a model for psychiatric and neurological disorders to identify anxiolytic compounds and pro-cognitive functions. The invention also provides for methods for screening and evaluating test compounds for their ability to modulate Kvss1.1 activity, specifically for inactivation of a potassium channel or for co-association with a-subunits.

Cette invention porte sur un animal transgénique contenant une sous-unité bêta 1 (Kv.beta.1) défectueuse d'un canal de potassium sensible à la tension, cette sous-unité Kv.beta.1 étant incapable de conférer une inactivation de type N de K?+¿, mais conservant la capacité de se co-associer avec des sous-unités .alpha. de la famille de Kv1, ce qui améliore l'expression de la surface du canal. De préférence, le gène Kv.beta.1.1 codant la sous-unité Kv.beta.1 possède une mutation dans la totalité des codons (1 à 70) ou une partie de ceux-ci de son domaine d'inactivation. Le mammifère transgénique est utile comme modèle dans les troubles psychiatriques et neurologiques pour identifier des composés anxiolytiques et des fonctions pro-cognitives. L'invention porte également sur des procédés de criblage et d'évaluation des composés tests dans leur capacité à moduler l'activité de Kv.beta.1.1, notamment dans l'inactivation d'un canal de potassium ou dans la co-association avec des sous-unités .alpha..

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