Regulation of murine IgE production in SJA/9 and nude mice. Potentiation of IgE production by recombinant interleukin 4.
Serum IgE levels were determined in different strains of mice with enzyme-linked immunosorbent assay by using rat monoclonal anti-murine IgE antibodies in normal and in Nippostrongylus brasiliensis-infected mice. After infection, serum IgE levels were high in BALB/c and CB-20, low in SJL/J and SJA/20 mice, and not detected at all in SJA/9 and nude mice. Surface IgE-positive cells were greatly increased in BALB/c and SJL/J mice after infection, but not in SJA/9 and nude mice. Most surface IgE-positive spleen cells were also surface IgM- and surface IgD-positive. When spleen cells from SJA/9 or nude mice were stimulated in vitro with lipopolysaccharide and recombinant interleukin 4 (formerly B cell-stimulating factor 1), IgE was produced and detected in the supernatants of these cultures. In addition, surface IgE-positive cells could be detected in these cultures. Most of the surface IgE-positive cells were surface IgM- and surface IgD-negative, unlike those seen in the spleens of Nippostrongylus-infected BALB/c and SJL/J mice. These observations show that SJA/9 and nude mice have IgE-producing precursor B cells, and after appropriate stimulation interleukin 4 can induce them to secrete IgE.
D000818:Animals; D002478:Cells, Cultured; D007070:Immunoglobulin A / Q000096:biosynthesis; D007073:Immunoglobulin E / Q000096:biosynthesis*; D007074:Immunoglobulin G / Q000096:biosynthesis; D015847:Interleukin-4; D007378:Interleukins / Q000494:pharmacology*; D051379:Mice; D008815:Mice, Inbred Strains / Q000276:immunology; D008819:Mice, Nude / Q000276:immunology; D009349:Nematode Infections / Q000276:immunology*; D009559:Nippostrongylus / Q000276:immunology; D011947:Receptors, Antigen, B-Cell / Q000276:immunology; D011994:Recombinant Proteins / Q000494:pharmacology; D013997:Time Factors
D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007378:Interleukins; D011947:Receptors, Antigen, B-Cell; D011994:Recombinant Proteins; D015847:Interleukin-4; D007073:Immunoglobulin E