Nonhuman model animal of th2-mediated hyperimmune response

A - Human Necessities – 01 – K

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A01K 67/027 (2006.01) C07K 14/705 (2006.01) C12N 5/10 (2006.01) C12N 15/09 (2006.01) C12N 15/85 (2006.01) G01N 33/15 (2006.01) G01N 33/50 (2006.01)

Patent

CA 2465327

An object of the present invention is to provide a nonhuman model animal of Th2-mediated hyperimmune response lacking PIR-B gene function on its chromosome by which the Th2-mediated immune response mechanism and allergy onset mechanism in vivo can be analyzed and which is liable to suffer from not only hyper-response of B cells but also allergy, and an inducer/promoter or an inhibitor for Th2-mediated immune response, etc. with the use of the nonhuman model animal of Th2-mediated hyperimmune response. The nonhuman model animal of Th2-mediated hyperimmune response is prepared by integrating a fragment comprising exons 1 to 7 and the domain in the 5' side of exon 8 of mouse PIR-B gene and another fragment containing exons 10 to 14 into a vector pMC1-Neo, cleaving it with Xho I-Sal I, integrating it into a vector pIC19R-MC1tk having herpes virus thymidine kinase to thereby construct targeting vector, transferring the targeting vector into ES cells and then injecting the ES cells into blastcyst.

L'invention concerne un modèle animal non humain de réponse hyperimmune à médiation Th2, dont les chromosomes ne portent pas le gène PIR-B, par lequel le mécanisme de réponse hyperimmun à médiation Th2 et le mécanisme de début d'allergie in vivo peuvent être analysés et qui est susceptible de souffrir non seulement d'une hyperréponse des lymphocytes B mais aussi d'allergie, ainsi qu'un inducteur/promoteur ou un inhibiteur de la réponse hyperimmune à médiation Th2, et l'utilisation de l'animal modèle non humain de réponse hyperimmune à médiation Th2. L'animal modèle non humain de réponse hyperimmune à médiation Th2 est préparé par intégration d'un fragment comprenant les exons 1 à 7 et le domaine du côté 5' de l'exon 8 de souris à gène PIB-R et d'un autre fragment contenant les exons 10 à 14 dans un vecteur pMC1-Neo, par scission de ce vecteur avec Xho I-SalI, par son intégration dans un vecteur pIC19R-MC1tk contenant une thymidine kinase du virus de l'herpès afin de construire un vecteur de ciblage, puis par transfert de ce vecteur de ciblage dans des cellules souches embryonnaires et par injection de ces cellules dans un blastocyste.

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