Human polyclonal antibodies from genetically engineered animals
First Claim
1. A polyclonal antisera composition of a nonhuman animal that specifically recognizes an immunogen, wherein said antisera composition is comprised predominantly of substantially human immunoglobulin protein molecules comprised of at least a portion of a human heavy chain polypeptide, wherein said substantially human immunoglobulin protein molecules specifically bind to said immunogen.
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Abstract
Substantially human antisera are provided by genetically modifying a domestic animal generally weighing at least about 1 kg. The domestic animal is genetically modified by generating inactive heavy and light chain immunoglobulin loci and integrating at least functional portions of the human heavy and light chain immunoglobulin loci, whereby the human loci generate an immune response. The antisera find use in the treatment of diseases, immunocompromised patients and in case of transplantation.
24 Citations
32 Claims
- 1. A polyclonal antisera composition of a nonhuman animal that specifically recognizes an immunogen, wherein said antisera composition is comprised predominantly of substantially human immunoglobulin protein molecules comprised of at least a portion of a human heavy chain polypeptide, wherein said substantially human immunoglobulin protein molecules specifically bind to said immunogen.
- 11. A transgenic nonhuman animal weighing at least 1 kg and comprising at least a portion of functional human heavy chain immunoglobulin genes integrated by homologous recombination into its genome, wherein said portion of functional human heavy chain immunoglobulin genes rearranges in frame with heavy chain immunoglobulin sequences endogenous to said nonhuman animal to encode functional, substantially human antibody molecules that comprise at least in part human heavy chain immunoglobulin polypeptide sequences, and wherein said animal predominantly produces said functional, substantially human antibody molecules when immunized.
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12. A transgenic nonhuman animal weighing at least 1 kg and comprising at least a portion of functional human light chain immunoglobulin genes integrated by homologous recombination into its genome, wherein said human light chain immunoglobulin genes rearrange in frame with sequences endogenous to said nonhuman animal to encode functional, substantially human antibody molecules that comprise at least in part human light chain immunoglobulin polypeptide sequences.
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26. A method of producing a transgenic nonhuman animal weighing at least 1 kg and comprising human immunoglobulin genes integrated by homologous recombination into its genome, wherein said animal predominantly produces functional, substantially human antibody molecules comprised at least in part of human immunoglobulin polypeptide sequences when immunized, said method comprising:
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producing a first mutated animal comprising heavy chain immunoglobulin loci where constant and/or variable region elements are replaced with at least a functional portion of the human heavy chain immunoglobulin locus by genetic alteration of a cell nucleus of said animal, introducing said cell nucleus into an enucleated nuclear transfer unit cell to provide a first embryonic stem cell, introducing said first nuclear transfer unit cell into a female recipient host to produce a first mutated neonate;
producing a second mutated animal comprising light chain immunoglobulin loci where constant and/or variable region elements are replaced with at least a functional portion of the human light chain immunoglobulin locus by genetic alteration of a cell nucleus of said animal, introducing said cell nucleus into an enucleated nuclear transfer unit cell to provide a second embryonic cell stem cell, introducing said second nuclear transfer unit cell into a female recipient host to produce a second mutated neonate; and
breeding mature first and second mutated neonates and selecting animals capable of producing substantially human antisera and being at least substantially incapable of producing endogenous antisera.
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27. A method of producing a transgenic nonhuman animal weighing at least 1 kg and comprising human immunoglobulin genes integrated by homologous recombination into its genome, wherein said animal predominantly produces functional, substantially human antibody molecules comprised at least in part of human immunoglobulin polypeptide sequences when immunized, said method comprising:
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producing a mutated animal comprising heavy and light chain immunoglobulin loci where constant and/or variable region elements are replaced with at least a functional portion or the human heavy and/or light chain immunoglobulin locus by genetic alteration of a cell nucleus of said animal, introducing said cell nucleus into an enucleated nuclear transfer unit cell to provide a embryonic cell stem cell, introducing said nuclear transfer unit cell into a female recipient host to produce mutated neonate; and
breeding mature mutated neonates and selecting animals capable of producing substantially human antisera and at least substantially incapable of producing endogenous antisera.
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Specification