PMID- 8436190 OWN - NLM STAT- MEDLINE DCOM- 19930322 LR - 20061115 IS - 0014-2980 (Print) IS - 0014-2980 (Linking) VI - 23 IP - 2 DP - 1993 Feb TI - Cross-linking of surface IgM, but not surface IgD receptors, by soluble monoclonal antibodies primes murine B cells to secrete immunoglobulin in response to lymphokines. PG - 574-7 AB - We have previously reported the development of a two-step culture system in which soluble anti-mu monoclonal antibodies prime small resting murine B cells to secrete immunoglobulin (Ig) in response to restimulation with a mixture of interleukin-4 (IL-4) and IL-5. Here we have extended these studies to investigate the effects of engaging surface IgD (sIgD). We find that, unlike anti-mu, three different anti-delta monoclonal antibodies did not prime B cells to secrete Ig. In addition, these anti-delta antibodies inhibited anti-mu-stimulated priming for Ig secretion, while enhancing DNA synthesis in response to anti-mu. Furthermore, anti-delta antibodies still inhibited anti-mu-induced priming when added 24-48 h after anti-mu. These results therefore suggest that triggering of sIgD on B cells induces a dominant inhibitory signal which is not necessarily dependent upon co-ligation of sIgM and sIgD receptors. In addition, these findings raise the possibility that ligating sIgM or sIgD receptors on mature B cells in the absence of T cell help, may produce different downstream effects. FAU - Phillips, C AU - Phillips C AD - National Institute for Medical Research, Mill Hill, London, GB. FAU - Klaus, G G AU - Klaus GG LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Eur J Immunol JT - European journal of immunology JID - 1273201 RN - 0 (Antibodies, Monoclonal) RN - 0 (Antigens, Surface) RN - 0 (Immunoglobulin delta-Chains) RN - 0 (Immunoglobulin mu-Chains) RN - 0 (Immunoglobulins) RN - 0 (Lymphokines) RN - 0 (Receptors, Fc) RN - 0 (Receptors, Immunologic) RN - 0 (immunoglobulin D receptor) RN - 0 (immunoglobulin M receptor) SB - IM MH - Animals MH - Antibodies, Monoclonal/*immunology MH - Antigens, Surface/*immunology MH - B-Lymphocytes/*immunology MH - Cells, Cultured MH - DNA Replication MH - Immunoglobulin delta-Chains/immunology MH - Immunoglobulin mu-Chains/immunology MH - Immunoglobulins/*biosynthesis MH - Lymphocyte Activation/immunology MH - Lymphokines/*immunology MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Mice, Inbred CBA MH - Receptors, Fc/*immunology MH - Receptors, Immunologic/*immunology MH - Solubility EDAT- 1993/02/01 00:00 MHDA- 1993/02/01 00:01 CRDT- 1993/02/01 00:00 PHST- 1993/02/01 00:00 [pubmed] PHST- 1993/02/01 00:01 [medline] PHST- 1993/02/01 00:00 [entrez] AID - 10.1002/eji.1830230243 [doi] PST - ppublish SO - Eur J Immunol. 1993 Feb;23(2):574-7. doi: 10.1002/eji.1830230243.