Fully human hybridoma fusion partner cell lines

A - Human Necessities – 61 – K

Patent

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A61K 39/395 (2006.01) C07H 21/04 (2006.01) C07K 14/82 (2006.01) C07K 16/30 (2006.01) C12P 21/06 (2006.01) C12N 5/06 (2006.01)

Patent

CA 2619983

Certain aspects of the present invention are directed to new fully human fusion partner cell lines called human Karyochi cells, and to methods for making them. Human Karyochi cells are then fused with human antibody-secreting lymphoid cells to make fully human hybridomas called Karyochi-based hybridomas, which likewise secrete fully human monoclonal antibodies. Human Karyochi cells are made by isolating a donor nucleus that is substantially free of cytoplasm from either a first malignant B-lymphocyte cell line or a normal B-lymphocyte, and transferring the donor nucleus into the cytoplasm of a recipient cell from a second T- or B-lymphoid cell line. With time the nuclei synchronize and fuse to form the chimeric Karyochi fusion partner cell line. Nuclear transfer can be accomplished using intra-cytosolic nucleus injection or by impact-induced nucleus administration.

La présente invention concerne en partie de nouvelles lignées cellulaires entièrement humaines partenaires de fusion, appelées cellules de Karyochi humaines, et des procédés pour fabriquer celles-ci. Les cellules de Karyochi humaines sont fusionnées avec des cellules lymphoïdes humaines qui sécrètent des anticorps, afin de produire des hybridomes entièrement humains appelés hybridomes à base de cellules de Karyochi, qui sécrètent également des anticorps monoclonaux entièrement humains. On obtient les cellules de Karyochi humaines en isolant un noyau donneur substantiellement dépourvu de cytoplasme, qui provient d'une première lignée cellulaire de lymphocyte B malin ou d'un lymphocyte B normal, et en transférant le noyau donneur dans le cytoplasme d'une cellule receveuse, qui provient d'une deuxième lignée cellulaire lymphoïde B ou T. Avec le temps, les noyaux se synchronisent et fusionnent pour former la lignée cellulaire partenaire de fusion Karyochi chimérique. Le transfert nucléaire peut être effectué à l'aide d'une injection nucléaire intracytosolique ou d'une administration nucléaire induite par impact.

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