Transgenic mice depleted in a mature lymphocytic cell-type
First Claim
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1. A transgenic mouse having a phenotype characterized by a disruption of the expression of the Cμ
- and Cδ
portions of the endogenous immunoglobulin heavy chain and an absence of plasma B cells producing naturally occurring mouse antibodies, the phenotype being conferred by an immunoglobulin heavy chain targeting transgene introduced into an ES target cell and integrated into somatic and germ cells of the tranegenic mouse or an ancestor thereof by homologous recombination with a cognate endogenous immunoglobulin heavy chain allele to yield a targeted immunoglobulin heavy chain allele which is not expressed, the immunoglobulin heavy chain targeting transgene comprising a stop codon, DNA sequences for identification and selection of ES cells containing the transgene in the targeted allele and DNA sequences of a mouse heavy chain immunoglobulin gene having sufficient sequence homology to recombine with the endogenous allele in said ES target cell.
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Abstract
Transgenic mice having a phenotype characterized by the substantial depletion of a mature lymphocytic cell type otherwise naturally occurring in the species from which the transgenic mouse is derived. The phenotype is conferred in the transgenic mouse by a transgene contained in at least the precursor stem cell of the lymphocytic cell type which is depleted. The transgene comprised is a DNA sequence encoding a lymphatic polypeptide variant which inhibits maturation of the lymphocytic cell type.
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Citations
5 Claims
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1. A transgenic mouse having a phenotype characterized by a disruption of the expression of the Cμ
- and Cδ
portions of the endogenous immunoglobulin heavy chain and an absence of plasma B cells producing naturally occurring mouse antibodies, the phenotype being conferred by an immunoglobulin heavy chain targeting transgene introduced into an ES target cell and integrated into somatic and germ cells of the tranegenic mouse or an ancestor thereof by homologous recombination with a cognate endogenous immunoglobulin heavy chain allele to yield a targeted immunoglobulin heavy chain allele which is not expressed, the immunoglobulin heavy chain targeting transgene comprising a stop codon, DNA sequences for identification and selection of ES cells containing the transgene in the targeted allele and DNA sequences of a mouse heavy chain immunoglobulin gene having sufficient sequence homology to recombine with the endogenous allele in said ES target cell. - View Dependent Claims (2, 3, 4, 5)
- and Cδ
Specification