Method for expanding primate b cells selectively in...

A - Human Necessities – 01 – K

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A01K 67/027 (2006.01) C07K 16/08 (2006.01) C07K 16/10 (2006.01) C07K 16/24 (2006.01) C12N 5/28 (2006.01) C12P 21/08 (2006.01) A61K 35/12 (2006.01)

Patent

CA 2332336

The present invention relates to a method for reconstituting immunocompromised mice with primate cells, consisting of the following steps: (a) preparation of an immunocompromised mouse by administration of an antibody against the beta chain of the mouse interleukin 2 (IL-2) receptor, more particularly the monoclonal mouse TM-.beta.1 monoclonal antibody and/or gamma irradiation, (b) intraspleen injection of primate cells into the spleen of the pre-treated immunocompromised mouse of step (a), where these primate cells preferably originate from a primate donor and where this primate donor may have been immunised with a well-defined antigen. This method was found to be highly suitable for expanding primate B lymphocytes in an animal model in a rapid, as yet unequalled manner. Other embodiments of this invention relate to immunocompromised mice obtained by the aforesaid method and also the use thereof as animal models, primate B cell culture produced and primate monoclonal antibodies derived therefrom.

La présente invention concerne un procédé permettant de conférer des cellules de primate à une souris immunodéprimée. Ce procédé comprend les étapes consistant à: (a) préparer une souris immunodéprimée en lui administrant un anticorps contre la chaîne béta du récepteur (IL-2) de l'interleukine 2 de la souris, et plus particulièrement, l'anticorps monoclonal TM-.beta.1 de la souris et/ou en la soumettant à un rayonnement gamma; et (b) à administrer, par injection dans la rate de la souris immunodéprimée pré-traitée des cellules de primate. Ces cellules de primate proviennent, de préférence, d'un donneur primate et ce donneur peut avoir été immunisé par un antigène bien défini. Ce procédé permet d'augmenter de manière appropriée des lymphocytes B de primates chez un modèle animal avec rapidité et sans égal. D'autres modes de réalisation de la présente invention concernent des souris immunodéprimées obtenues par le procédé susmentionné et également l'utilisation de ces dernières comme modèles animaux, des cultures de lymphocytes B de primates ainsi produits et des anticorps monoclonaux de primates dérivés de ces dernières.

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