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IL-4-dependent IgE switch in membrane IgA-positive human B cells. 1991

X H Zhang, and C Werner-Favre, and H Y Tang, and N Brouwers, and J Y Bonnefoy, and R H Zubler
Department of Medicine, Geneva University Hospital, Switzerland.

IgE responses by human B cells, separated according to membrane Ig classes, were analyzed in a clonal assay using EL-4 thymoma cells as helper cells, T cell supernatant, and rIL-4. In cultures seeded by means of the autoclone apparatus of the FACS, IgE responses were generated frequently by either IgM (mu+/gamma-alpha-) or IgA (alpha +/mu-)-positive B cells (16 and 14% of the Ig producing wells, respectively), but rarely by IgG (gamma +/mu-)-positive B cells (1.3% of Ig producing wells). The total amounts of Ig secreted by IgM-, IgG-, or IgA-positive cells and the total proportions of responding autoclone wells (23-27%) were comparable. All IgE secretion was IL-4 dependent. When the Ig secretion patterns from alpha +/mu- vs alpha +/mu-epsilon- B cells were compared, most autoclone wells from both types of cells produced IgA only, and similar proportions of IgA producing wells (6.2 and 6.0%) also secreted IgE. In addition, IgE restricted responses occurred 6 times more frequently with alpha +/mu- than with alpha +/mu-epsilon- cells, which suggests that membrane IgA+E double-positive, IgE committed B cells occur in vivo. The isotype pattern generated by alpha +/mu-epsilon- B cells cannot be explained by a chance assortment of separate IgA and IgE precursors or by cytophilic antibody. Thus, IL-4 dependent switch to IgE occurred frequently in IgM- or IgA-positive, but rarely among total IgG-positive, B cells. This could be relevant to IgE production in mucosal tissues rich in IgA expressing B cells.

UI MeSH Term Description Entries
D007070 Immunoglobulin A Represents 15-20% of the human serum immunoglobulins, mostly as the 4-chain polymer in humans or dimer in other mammals. Secretory IgA (IMMUNOGLOBULIN A, SECRETORY) is the main immunoglobulin in secretions. IgA,IgA Antibody,IgA1,IgA2,Antibody, IgA
D007073 Immunoglobulin E An immunoglobulin associated with MAST CELLS. Overexpression has been associated with allergic hypersensitivity (HYPERSENSITIVITY, IMMEDIATE). IgE
D007075 Immunoglobulin M A class of immunoglobulin bearing mu chains (IMMUNOGLOBULIN MU-CHAINS). IgM can fix COMPLEMENT. The name comes from its high molecular weight and originally was called a macroglobulin. Gamma Globulin, 19S,IgM,IgM Antibody,IgM1,IgM2,19S Gamma Globulin,Antibody, IgM
D007132 Immunoglobulin Isotypes The classes of immunoglobulins found in any species of animal. In man there are nine classes that migrate in five different groups in electrophoresis; they each consist of two light and two heavy protein chains, and each group has distinguishing structural and functional properties. Antibody Class,Ig Isotype,Ig Isotypes,Immunoglobulin Class,Immunoglobulin Isotype,Antibody Classes,Immunoglobulin Classes,Class, Antibody,Class, Immunoglobulin,Classes, Antibody,Classes, Immunoglobulin,Isotype, Ig,Isotype, Immunoglobulin,Isotypes, Ig,Isotypes, Immunoglobulin
D005812 Genes, Switch Genes that cause the epigenotype (i.e., the interrelated developmental pathways through which the adult organism is realized) to switch to an alternate cell lineage-related pathway. Switch complexes control the expression of normal functional development as well as oncogenic transformation. Switch Genes,Switching Complex,Switch Complexes,Switching Complexes,Complex, Switching,Complexes, Switch,Complexes, Switching,Gene, Switch,Switch Gene
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014407 Tumor Cells, Cultured Cells grown in vitro from neoplastic tissue. If they can be established as a TUMOR CELL LINE, they can be propagated in cell culture indefinitely. Cultured Tumor Cells,Neoplastic Cells, Cultured,Cultured Neoplastic Cells,Cell, Cultured Neoplastic,Cell, Cultured Tumor,Cells, Cultured Neoplastic,Cells, Cultured Tumor,Cultured Neoplastic Cell,Cultured Tumor Cell,Neoplastic Cell, Cultured,Tumor Cell, Cultured
D015847 Interleukin-4 A soluble factor produced by activated T-LYMPHOCYTES that induces the expression of MHC CLASS II GENES and FC RECEPTORS on B-LYMPHOCYTES and causes their proliferation and differentiation. It also acts on T-lymphocytes, MAST CELLS, and several other hematopoietic lineage cells. B-Cell Growth Factor-I,B-Cell Stimulatory Factor-1,Binetrakin,IL-4,Mast Cell Growth Factor-2,B Cell Stimulatory Factor-1,B-Cell Growth Factor-1,B-Cell Proliferating Factor,B-Cell Stimulating Factor-1,B-Cell Stimulatory Factor 1,BCGF-1,BSF-1,IL4,MCGF-2,B Cell Growth Factor 1,B Cell Growth Factor I,B Cell Proliferating Factor,B Cell Stimulating Factor 1,B Cell Stimulatory Factor 1,Interleukin 4,Mast Cell Growth Factor 2
D016175 B-Lymphocyte Subsets A classification of B-lymphocytes based on structurally or functionally different populations of cells. B-Cell Subsets,Tumor-Infiltrating B Cells,Tumor-Infiltrating B Lymphocytes,B Effector 1 Cells,B Effector 2 Cells,B-1 Cells,B-1 Lymphocytes,B-2 Lymphocytes,B-Lymphocytes, Effector,B1 Lymphocytes,B2 Lymphocytes,Be1 Cells,Be2 Cells,Effector B Cells,B 1 Cells,B 1 Lymphocytes,B 2 Lymphocytes,B Cell Subsets,B Cell, Tumor-Infiltrating,B Lymphocyte Subsets,B Lymphocyte, Tumor-Infiltrating,B-1 Cell,B-1 Lymphocyte,B-2 Lymphocyte,B-Cell Subset,B-Lymphocyte Subset,B-Lymphocyte, Effector,B1 Lymphocyte,B2 Lymphocyte,Be1 Cell,Be2 Cell,Cell, B-1,Cell, Be1,Cell, Be2,Effector B Cell,Effector B-Lymphocyte,Effector B-Lymphocytes,Lymphocyte, B-1,Lymphocyte, B-2,Lymphocyte, B1,Lymphocyte, B2,Tumor Infiltrating B Cells,Tumor Infiltrating B Lymphocytes,Tumor-Infiltrating B Cell,Tumor-Infiltrating B Lymphocyte
D066298 In Vitro Techniques Methods to study reactions or processes taking place in an artificial environment outside the living organism. In Vitro Test,In Vitro Testing,In Vitro Tests,In Vitro as Topic,In Vitro,In Vitro Technique,In Vitro Testings,Technique, In Vitro,Techniques, In Vitro,Test, In Vitro,Testing, In Vitro,Testings, In Vitro,Tests, In Vitro,Vitro Testing, In

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