Abstract:
:Among 15 anti-DNA antibody-producing hybridomas derived from a single NZB X NZW F1 mouse, an IgM and an IgG were shown to use the same VH gene of the Q52 family. Using a combination of two primers both consisting of a mixture of oligonucleotides (one complementary to the 5' end of VH segment and one to the 3' end of VH segment of Q52 family) we determined the sequences of several members of germ-line VH genes in the Q52 family derived from NZB and NZW strains. Comparison of the sequences with those of cloned VH cDNA obtained from the hybridomas revealed that the VH sequence of the IgM anti-DNA antibody was identical to that of a cloned NZW germ-line VH gene, except for the priming sites. In contrast, the VH sequence of the IgG counterpart contained somatically mutated nucleotides. Because the IgG anti-DNA antibody showed a higher DNA binding activity than did the IgM antibody, we conclude that these changes in nucleotide sequences were induced and selected through an antigen-driven mechanism as is the case in a normal immune response. It is tempting to speculate that the germ-line encoded, low-affinity IgM autoantibody undergoes somatic mutations and isotype switching, resulting in generation of pathogenic, high-affinity autoantibodies in autoimmune diseases.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Taki S,Hirose S,Kinoshita K,Nishimura H,Shimamura T,Hamuro J,Shirai Tdoi
10.1002/eji.1830220417keywords:
subject
Has Abstractpub_date
1992-04-01 00:00:00pages
987-92issue
4eissn
0014-2980issn
1521-4141journal_volume
22pub_type
杂志文章abstract::Human antibodies against HIV-1 have been sought to study neutralization events on the molecular level, and for possible use in passive immune intervention. The development of phage display techniques has opened the possibility of rapidly generating human monoclonal antibodies with desired specificities. We and others ...
journal_title:European journal of immunology
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doi:10.1002/eji.1830261231
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abstract::NK cells and cytotoxic T lymphocytes can induce apoptosis in virus-infected and transformed target cells via the granule exocytosis pathway. The key components of the cytolytic granules are perforin and several serine esterases, termed granzymes. While the cellular distribution of human granzymes A (GrA) and B (GrB) h...
journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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abstract::In rheumatoid arthritis (RA), T cells in the inflamed joint are considered to play a crucial role in the pathogenesis. However, despite the fact that synovial T cells have an activated memory phenotype, they are functionally suppressed upon combined CD3 and CD28 stimulation. Here, we analyzed the contribution of both ...
journal_title:European journal of immunology
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journal_title:European journal of immunology
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abstract::Dermal and mucosal lymphocyte infiltrates in patients with lichen ruber planus and chronic graft-vs.-host disease exhibited reactivity with anti-fibronectin antibodies. This reactivity was associated with the lymphocytes and localized pericellularly. In contrast, biopsy areas outside lymphocyte accumulations were rela...
journal_title:European journal of immunology
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doi:10.1002/eji.1830210209
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abstract::The human promyelocytic U937 cells express detectable levels of MHC class II (MHC-II) molecules. Treatment with 12-o--tetradecanoyl phorbol 13-acetate (TPA), inducing macrophage-like differentiation, produces a dramatic decrease of MHC-II expression as result of down-modulation of the activation of immune response gen...
journal_title:European journal of immunology
pub_type: 杂志文章
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journal_title:European journal of immunology
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doi:10.1002/eji.1830260411
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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doi:10.1002/eji.1830271127
更新日期:1997-11-01 00:00:00
abstract::Monocyte/macrophage-mediated cytotoxicity requires the generation of activated oxygen radicals, which can be measured by chemiluminescence (CL). To investigate whether natural killer (NK) cell activity required activated oxygen species, both cytotoxicity against K562 target cells and CL were measured in cell populatio...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830140710
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830181112
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abstract::T cell stimulation of B cell proliferation during T-B collaboration requires membrane-bound stimulatory ligands, such as CD40 ligand and the secretion of soluble cytokines, such as IL-4. Nevertheless, it remains unclear whether T cell contact is required to provoke each consecutive B cell division, or whether B cells ...
journal_title:European journal of immunology
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更新日期:2001-04-01 00:00:00
abstract::Cartilage-specific proteins are considered potential autoantigens that could continuously fuel autoimmune responses directed to the joints in rheumatoid arthritis (RA). Using recombinant chimeric collagen type II we have identified one major type II collagen (CII) epitope (denoted U1) recognized by RA sera. The U1 epi...
journal_title:European journal of immunology
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更新日期:2001-06-01 00:00:00
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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更新日期:1994-10-01 00:00:00
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journal_title:European journal of immunology
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更新日期:2003-11-01 00:00:00