Publication Date:
1996-06-14
Description:
As a model for studying the generation of antibody diversity, a gene-targeted mouse was produced that is hemizygous for a rearranged V(D)J segment at the immunoglobulin (Ig) heavy chain locus, the other allele being nonfunctional. The mouse also has no functional kappa light chain allele. The heavy chain, when paired with any lambda light chain, is specific for the hapten (4-hydroxy-3-nitrophenyl) acetyl (NP). The primary repertoire of this quasi-monoclonal mouse is monospecific, but somatic hypermutation and secondary rearrangements change the specificity of 20 percent of the antigen receptors on B cells. The serum concentrations of the Ig isotypes are similar to those in nontransgenic littermates, but less than half of the serum IgM binds to NP, and none of the other isotypes do. Thus, neither network interactions nor random activation of a small fraction of the B cell population can account for serum Ig concentrations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cascalho, M -- Ma, A -- Lee, S -- Masat, L -- Wabl, M -- 1R01 GM37699/GM/NIGMS NIH HHS/ -- P60 AR20684/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jun 14;272(5268):1649-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, University of California, San Francisco 94143-0670, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8658139" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Antibodies, Monoclonal/*genetics/immunology
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*Antigens, CD
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Antigens, CD43
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Antigens, CD45/immunology
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B-Lymphocytes/cytology/immunology
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Base Sequence
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Cell Line
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Cloning, Molecular
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Dna
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Flow Cytometry
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Gene Rearrangement, B-Lymphocyte, Heavy Chain
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Haptens/immunology
;
Immunoglobulin Heavy Chains/*genetics/immunology
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Immunoglobulin Isotypes/genetics
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Immunoglobulin J-Chains/genetics
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Immunoglobulin Light Chains/genetics/immunology
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Immunoglobulin Variable Region/genetics
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Mice
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Mice, Inbred BALB C
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Mice, Inbred C57BL
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Mice, Knockout/genetics/*immunology
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Molecular Sequence Data
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Nitrophenols/immunology
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Phenylacetates
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Recombinant Proteins/genetics/immunology
;
Sialoglycoproteins/immunology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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