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Immunoglobulin-specific T-B cell interaction. I. Presentation of self immunoglobulin determinants by B lymphocytes. 1989

A Y Rudensky, and V L Yurin
Laboratory of Immunology, All-Union Research Institute for Genetics, Moscow, USSR.

Immunoglobulin (Ig)-specific T-B cell interactions have been studied in the model of T cell recognition of the kappa chain Ig kappa-1b allotype in Ig kappa-1-congeneic rat strains. An efficient presentation of endogenous Ig allotypic determinants by irradiated spleen cells from (WAG.1b x August)F1 (RT-1u/c; Ig kappa-1b/1a) rats to Ig kappa-1b-specific lymph node T cells from Ig kappa-1-congeneic (WAG x August)F1 (RT-1u/c; Ig kappa-1a) rats was demonstrated. This presentation was found to be sensitive to high irradiation doses (greater than 1000 rad). By fractionation of Ig kappa-1b+ F1 spleen cells on Percoll density gradient we have shown that a radioresistant, low-density fraction, consisting mainly of macrophages (M phi) and dendritic cells, triggers only weak Ig kappa-1b-specific T cell response. The high level of response was observed against radiosensitive spleen cell fractions of intermediate and high density, suggesting that B cells were the main antigen-presenting cells (APC) of Ig kappa-1b determinants of endogenous Ig. This conclusion was confirmed in the experiments using purified B cells from Ig kappa-1b-bearing rats. Earlier we have shown that the responsiveness of August (RT-1c; Ig kappa-1a) and WAG (RT-1u; Ig kappa-1a) rats to Ig kappa-1b in vivo is controlled by the dominant allele of an RT-1-linked Ir gene. August and (August X WAG)F1 rats were found to be responders to Ig kappa-1b while WAG rats were nonresponders. The same pattern of Ir gene-controlled reactivity was demonstrated using an Ig kappa-1b-specific T cell proliferation assay. Ig kappa-1b-specific F1 T cell response was only observed when Ig kappa-1b+ B cells or IgG (Ig kappa-1b)-pulsed M phi-bearing responder major histocompatibility complex (MHC) haplotype were used as the APC. Anti-RT-1 monoclonal antibody inhibition studies suggested that the RT-1Bc molecule is the main restricting element of T cell recognition of Ig kappa-1b+ B cell as well as exogenous IgG (Ig kappa-1b). We have demonstrated allelic exclusion of Ig kappa-1b presenting function by negatively and positively selecting for Ig kappa-1b+ and Ig kappa-1a+ B cells from heterozygous F1(Ig kappa-1b/1a) rats. This clearly indicate that the B cells presented exclusively Ig kappa-1b allotypic determinants of their own Ig.(ABSTRACT TRUNCATED AT 400 WORDS)

UI MeSH Term Description Entries
D007126 Immunoglobulin Allotypes Allelic variants of the immunoglobulin light chains (IMMUNOGLOBULIN LIGHT CHAINS) or heavy chains (IMMUNOGLOBULIN HEAVY CHAINS) encoded by ALLELES of IMMUNOGLOBULIN GENES. Allotypes, Immunoglobulin,Allotypic Antibodies,Antibodies, Allotypic,Ig Allotypes,Allotype, Ig,Allotype, Immunoglobulin,Allotypes, Ig,Allotypic Antibody,Antibody, Allotypic,Ig Allotype,Immunoglobulin Allotype
D007145 Immunoglobulin kappa-Chains One of the types of light chains of the immunoglobulins with a molecular weight of approximately 22 kDa. Ig kappa Chains,Immunoglobulins, kappa-Chain,kappa-Immunoglobulin Light Chains,Immunoglobulin kappa-Chain,kappa-Chain Immunoglobulins,kappa-Immunoglobulin Light Chain,kappa-Immunoglobulin Subgroup VK-12,kappa-Immunoglobulin Subgroup VK-21,Chains, Ig kappa,Immunoglobulin kappa Chain,Immunoglobulin kappa Chains,Immunoglobulins, kappa Chain,Light Chain, kappa-Immunoglobulin,Light Chains, kappa-Immunoglobulin,kappa Chain Immunoglobulins,kappa Chains, Ig,kappa Immunoglobulin Light Chain,kappa Immunoglobulin Light Chains,kappa Immunoglobulin Subgroup VK 12,kappa Immunoglobulin Subgroup VK 21,kappa-Chain, Immunoglobulin,kappa-Chains, Immunoglobulin
D008211 Lymphocyte Cooperation T-cell enhancement of the B-cell response to thymic-dependent antigens. Cooperation, Lymphocyte,Cooperations, Lymphocyte,Lymphocyte Cooperations
D008285 Major Histocompatibility Complex The genetic region which contains the loci of genes which determine the structure of the serologically defined (SD) and lymphocyte-defined (LD) TRANSPLANTATION ANTIGENS, genes which control the structure of the IMMUNE RESPONSE-ASSOCIATED ANTIGENS, HUMAN; the IMMUNE RESPONSE GENES which control the ability of an animal to respond immunologically to antigenic stimuli, and genes which determine the structure and/or level of the first four components of complement. Histocompatibility Complex,Complex, Histocompatibility,Complex, Major Histocompatibility,Complices, Histocompatibility,Complices, Major Histocompatibility,Histocompatibility Complex, Major,Histocompatibility Complices,Histocompatibility Complices, Major,Major Histocompatibility Complices
D011919 Rats, Inbred Strains Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding. August Rats,Inbred Rat Strains,Inbred Strain of Rat,Inbred Strain of Rats,Inbred Strains of Rats,Rat, Inbred Strain,August Rat,Inbred Rat Strain,Inbred Strain Rat,Inbred Strain Rats,Inbred Strains Rat,Inbred Strains Rats,Rat Inbred Strain,Rat Inbred Strains,Rat Strain, Inbred,Rat Strains, Inbred,Rat, August,Rat, Inbred Strains,Rats Inbred Strain,Rats Inbred Strains,Rats, August,Rats, Inbred Strain,Strain Rat, Inbred,Strain Rats, Inbred,Strain, Inbred Rat,Strains, Inbred Rat
D005802 Genes, MHC Class II Genetic loci in the vertebrate major histocompatibility complex that encode polymorphic products which control the immune response to specific antigens. The genes are found in the HLA-D region in humans and include H-2M, I-A, and I-E loci in mice. Class II Genes,Genes, Class II,Genes, HLA Class II,MHC Class II Genes,Class II Gene,Gene, Class II
D006579 Heterozygote An individual having different alleles at one or more loci regarding a specific character. Carriers, Genetic,Genetic Carriers,Carrier, Genetic,Genetic Carrier,Heterozygotes
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000938 Antigen-Presenting Cells A heterogeneous group of immunocompetent cells that mediate the cellular immune response by processing and presenting antigens to the T-cells. Traditional antigen-presenting cells include MACROPHAGES; DENDRITIC CELLS; LANGERHANS CELLS; and B-LYMPHOCYTES. FOLLICULAR DENDRITIC CELLS are not traditional antigen-presenting cells, but because they hold antigen on their cell surface in the form of IMMUNE COMPLEXES for B-cell recognition they are considered so by some authors. Accessory Cells, Immunologic,Antigen-Presenting Cell,Immunologic Accessory Cells,Accessory Cell, Immunologic,Cell, Immunologic Accessory,Cells, Immunologic Accessory,Immunologic Accessory Cell,Antigen Presenting Cell,Antigen Presenting Cells,Cell, Antigen-Presenting,Cells, Antigen-Presenting
D000939 Epitopes Sites on an antigen that interact with specific antibodies. Antigenic Determinant,Antigenic Determinants,Antigenic Specificity,Epitope,Determinant, Antigenic,Determinants, Antigenic,Specificity, Antigenic

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