title: The role of the interleukin-10 subfamily members in immunoglobulin production by human B cells.
abstract: Interleukin (IL)-10 has been shown to have various effects on B cells, including positively affecting the production of immunoglobulin A (IgA) and IgG. Several human IL-10-related molecules have been identified. These include IL-19, IL-20, IL-22, IL-24, IL-26, IL-28 and IL-29. To determine the effects of the IL-10 analogues on the class switch recombination in B cells, we analysed Ig production from naïve B cells stimulated with these cytokines in the presence of anti-CD40. None of the cytokines were found to induce Ig production by themselves in the presence of anti-CD40 Ab. However, all cytokines inhibited the production of IgA and IgG induced by anti-CD40 Ab alone. In combination with anti-CD40 Ab and IL-4, IgG4 were inhibited in cultures stimulated with IL-20, IL-22, IL-26, IL-28 and IL-29 compared with IL-4 and anti-CD40 Ab alone, whereas all IL-10 analogues increased the production of total IgG. All analogues reduced anti-CD40 Ab + transforming growth factor (TGF)-beta-induced IgA production compared with cultures stimulated with anti-CD40 Ab and TGF-beta alone. Together, these data show that the IL-10-related cytokines in combination with anti-CD40 Ab are not by themselves directly involved in the Ig regulation in B cells. However, some of the analogues might have regulatory effects on CSR induced by CD40-ligation in combination with IL-4 or TGF-beta.
authors.affiliation: Laboratory of Medical Allergology, Allergy Clinic, National University Hospital, Copenhagen, Denmark. l.hummelshoj@rh.dk
authors.forename: L
authors.initials: L
authors.lastname: Hummelshoj
authors.forename: L P
authors.initials: LP
authors.lastname: Ryder
authors.forename: L K
authors.initials: LK
authors.lastname: Poulsen
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology*; D019013:CD40 Antigens / Q000276:immunology; D002460:Cell Line; D003564:Cytidine Deaminase / Q000235:genetics; D005803:Genes, Immunoglobulin; D006801:Humans; D007070:Immunoglobulin A / Q000096:biosynthesis; D017578:Immunoglobulin Class Switching; D007073:Immunoglobulin E / Q000096:biosynthesis; D007074:Immunoglobulin G / Q000096:biosynthesis; D016753:Interleukin-10 / Q000276:immunology*; D007378:Interleukins / Q000276:immunology*; D051379:Mice; D014158:Transcription, Genetic; D016212:Transforming Growth Factor beta; D000098830:AICDA (Activation-Induced Cytidine Deaminase)
chemical_list: D019013:CD40 Antigens; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007378:Interleukins; D016212:Transforming Growth Factor beta; D016753:Interleukin-10; D007073:Immunoglobulin E; D000098830:AICDA (Activation-Induced Cytidine Deaminase); D003564:Cytidine Deaminase