The functional disruption of avian immunoglobulin genes

A - Human Necessities – 01 – K

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A01K 67/00 (2006.01) A01K 67/027 (2006.01) C12N 15/85 (2006.01)

Patent

CA 2480018

A transgenic chicken is disclosed having disrupted endogenous immunoglobulin production. In one embodiment, a targeting construct is stably integrated into the genome of the chicken by homologous recombination in embryonic stem cells, and injection of the engineered embryonic stem cells into recipient embryos, thereby knocking out the endogenous immunoglobulin gene locus in resulting animals. The targeted disruption of the locus in embryonic stem cells is particularly useful in combination with the insertion of geneticelements encoding exogenous immunoglobulin molecules. After these chickens are cross~bred, a line of chickens is produced that has a reduction of endogenous immunoglobulin molecule production.

La présente invention a trait à un poulet transgénique présentant une production d'immunoglobulines endogènes dissociés. Dans un mode de réalisation, une construction de ciblage est intégrée de manière stable dans le génome du poulet par la recombinaison homologue dans des cellules souches embryonnaires, et l'injection des cellules embryonnaires génétiquement modifiées dans des embryons de réception, éjectant ainsi le locus des gènes d'immunoglobulines endogènes dans les animaux obtenus. La dissociation ciblée du locus dans des cellules souches embryonnaires est particulièrement utile en combinaison avec l'insertion d'éléments génétiques codant pour les molécules d'immunoglobulines exogènes. Suite au croisement des poulets, une lignée de poulets est produite qui présente une réduction de la production de molécules d'immunoglobulines endogènes.

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