摘要:
The present invention relates to the production of a trangenic bovine which comprises a genetic modification that resulrs in inactivation and loss of expression of its endogenous antibodies, and the expression of xenogenous antibodies, preferably human antibodies. This is effected by inactivation of the IgM heavy chain expression and, optionally, by inactivation of the Ig light chain expression, and by the further introduction of an artificial chromosome which results on the expression of non-bovine antibodies, preferably human antibodies.
摘要:
In general, the invention features genetically modified non-human mammals (e.g., bovines and other ungulates), and method of making these mammals. In particular, the invention features transgenic ungulates having reduced levels of endogenous IgM heavy chain and/or prion protein.
摘要:
The present invention provides a transgenic nonhuman mammal, preferably a rodent, comprising two human immunoglobulin loci, wherein one of two said human immunoglobulin loci is a human heavy chain locus and the other locus is a human light chain locus; and wherein only one of said loci is of a transchromosome. In some transgenic nonhuman mammals, the endogenous mammalian heavy chain locus and at least one mammalian light chain locus are inactivated. In some such transgenic nonhuman mammals, the endogenous mammalian heavy chain locus and kappa light chain locus are inactivated. The present invention further provides methods of generating a plurality of B cells from a transgenic nonhuman mammal expressing human antibody sequences. Additional methods of the invention comprise fusing the plurality of B cells with immortalized cells to form hybridomas. The present invention also provides methods of generating a human sequence antibody from a transgenic nonhuman mammal.
摘要:
The present invention provides a transgenic nonhuman mammal, preferably a rodent, comprising two human immunoglobulin loci, wherein one of two said human immunoglobulin loci is a human heavy chain locus and the other locus is a human light chain locus; and wherein only one of said loci is of a transchromosome. In some transgenic nonhuman mammals, the endogenous mammalian heavy chain locus and at least one mammalian light chain locus are inactivated. In some such transgenic nonhuman mammals, the endogenous mammalian heavy chain locus and kappa light chain locus are inactivated. The present invention further provides methods of generating a plurality of B cells from a transgenic nonhuman mammal expressing human antibody sequences. Additional methods of the invention comprise fusing the plurality of B cells with immortalized cells to form hybridomas. The present invention also provides methods of generating a human sequence antibody from a transgenic nonhuman mammal.