Method for identifying alzheimer's disease therapeutics...

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/00 (2006.01) C07K 14/47 (2006.01) C12N 15/85 (2006.01) C12Q 1/02 (2006.01) C12Q 1/25 (2006.01) C12Q 1/68 (2006.01) G01N 33/53 (2006.01) G01N 33/68 (2006.01)

Patent

CA 2222174

The construction of transgenic animal models of human Alzheimer's disease, and methods of using the models to screen potential Alzheimer's disease therapeutics, are described. The models are characterized by pathologies similar to pathologies observed in Alzheimer's disease, based on expression of all three forms of the .beta.-amyloid precursor protein (APP), APP695, APP751, and APP770, as well as various point mutations based on naturally occurring mutations, such as the London and Indiana familial Alzheimer's diseae (FAD) mutations at amino acid 717, predicted mutations in the APP gene, and truncated forms of APP that contain the A.beta. region. Animal cells can be isolated from the transgenic animals or prepared using the same constructs with standard techniques such as lipofection or eletroporation. The transgenic animals, or animal cells, are used to screen for compounds altering the pathological course of Alzheimer's disease as measured by their effect on the amount of APP, .beta.-amyloid peptide, and numerous other Alzeimer's disease markers in the animals, the neuropathology of the animals, as well as by behavioral alterations in the animals.

L'invention décrit la construction de modèles animaux trangéniques de la maladie d'Alzheimer humaine ainsi que des procédés d'utilisation desdits modèles pour sélectionner une thérapeutique potentielle de cette maladie. Lesdits modèles sont caractérisés par des pathologies similaires aux pathologies observées dans la maladie d'Alzheimer, fondées sur l'expression des trois formes de laprotéine précurseur .beta.-amyloïde (APP), APP695, APP751 et APP770, ainsi que diverses mutations ponctuelles fondées sur des mutations naturelles, telles que les mutations de la maladie d'Alzheimer familiale (FAD), dite de Londres et Indiana, au niveau de l'acide aminé 717, des mutations prédites dans le gène de l'APP et des formes tronquées d'APP contenant la région A.beta.. Des cellules animales peuvent être isolées à partir des animaux transgéniques ou préparées à l'aide des mêmes structures par des techniques classiques telles que la lipofection ou l'électroporation. Ces animaux transgéniques ou cellules animales sont utilisés pour cribler des composés modifiant l'évolution pathologique de la maladie d'Alzheimer telle que mesurée par l'effet desdits composés sur la quantité d'APP, de peptide .beta.-amyloïde et de nombreux autres marqueurs de la maladie d'Alzheimer chez les animaux, la neuropathologie de ces derniers, ainsi que les modifications de leur comportement.

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