NON-HUMAN MAMMALS FOR THE PRODUCTION OF CHIMERIC ANTIBODIES
First Claim
1. A non-human mammalian cell whose genome comprises an immunoglobulin (Ig) heavy chain locus comprising a transgene comprising a portion of a syngeneic Ig heavy chain locus, the portion comprising all or part of constant region genes encoding a chimeric Ig heavy chain, the transgene comprising a DNA fragment comprising in operable linkage from 5′
- to 3′
a DNA sequence of a human variable heavy (VH) segment gene operably linked to a constant region gene comprising a human CH1, syngeneic mammalian non-human CH2 and syngeneic mammalian non-human CH3 exons, where in the human CH1 exon is selected from the group consisting of a human mu constant region (Cμ
), a human delta constant region (Cδ
), a human gamma-1 constant region (Cγ
1), a human gamma-2 constant region (Cγ
2), a human gamma-4 constant region (Cγ
4), a human alpha constant region (Cα
), and a human epsilon constant region (Cε
), wherein the transgene comprising the human VH segment gene and the syngeneic Ig heavy chain locus replaces all or a portion of the endogenous Ig heavy chain locus, thereby the non-human mammalian cell comprises a genome encoding the chimeric Ig heavy chain.
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Accused Products
Abstract
The invention provides knock-in non-human cells and mammals having a genome encoding chimeric antibodies and methods of producing knock-in cells and mammals. Certain aspects of the invention include chimeric antibodies, humanized antibodies, pharmaceutical compositions and kits. Certain aspects of the invention also relate to diagnostic and treatment methods using the antibodies of the invention.
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Citations
23 Claims
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1. A non-human mammalian cell whose genome comprises an immunoglobulin (Ig) heavy chain locus comprising a transgene comprising a portion of a syngeneic Ig heavy chain locus, the portion comprising all or part of constant region genes encoding a chimeric Ig heavy chain, the transgene comprising a DNA fragment comprising in operable linkage from 5′
- to 3′
a DNA sequence of a human variable heavy (VH) segment gene operably linked to a constant region gene comprising a human CH1, syngeneic mammalian non-human CH2 and syngeneic mammalian non-human CH3 exons, where in the human CH1 exon is selected from the group consisting of a human mu constant region (Cμ
), a human delta constant region (Cδ
), a human gamma-1 constant region (Cγ
1), a human gamma-2 constant region (Cγ
2), a human gamma-4 constant region (Cγ
4), a human alpha constant region (Cα
), and a human epsilon constant region (Cε
), wherein the transgene comprising the human VH segment gene and the syngeneic Ig heavy chain locus replaces all or a portion of the endogenous Ig heavy chain locus, thereby the non-human mammalian cell comprises a genome encoding the chimeric Ig heavy chain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- to 3′
Specification