PMID- 2948111 OWN - NLM STAT- MEDLINE DCOM- 19870127 LR - 20190824 IS - 0161-5890 (Print) IS - 0161-5890 (Linking) VI - 23 IP - 7 DP - 1986 Jul TI - Cross-linking of IgE-receptor complexes at the cell surface: synthesis and characterization of a long bivalent hapten that is capable of triggering mast cells and rat basophilic leukemia cells. PG - 783-90 AB - The ability of a series of bivalent haptens to bind and cross-link immunoglobulin E (IgE) in solution and on the surface of cells was examined. Several short (less than 30 A) dinitrophenyl (DNP) haptens were found to bind tightly to and cross-link a monoclonal anti-DNP IgE in solution, but these failed to trigger substantial release of 3H-serotonin from sensitized rat basophilic leukemia (RBL) cells or rat peritoneal mast cells. A longer bivalent hapten, approximately 50 A in length, consisting of two DNP-aminocaproyl-L-tyrosine (DCT) groups coupled to the alpha-amino groups of L-cystine was synthesized and characterized. This bivalent hapten [(DCT)2-cystine], binds very tightly to the same monoclonal anti-DNP IgE in solution and cross-links these antibodies to form higher mol. wt aggregates as judged by gel filtration and binding studies. It also stimulates degranulation of both RBL and mast cells sensitized with two different monoclonal anti-DNP IgE antibodies, with the mast cells exhibiting generally greater responsiveness to this ligand. The (DCT)2-cystine bivalent hapten appears to have the structural features necessary for carrying out detailed binding studies with receptor-bound IgE on the cell surface. FAU - Kane, P AU - Kane P FAU - Erickson, J AU - Erickson J FAU - Fewtrell, C AU - Fewtrell C FAU - Baird, B AU - Baird B FAU - Holowka, D AU - Holowka D LA - eng GR - AI 18306/AI/NIAID NIH HHS/United States GR - AI 18610/AI/NIAID NIH HHS/United States GR - GM 13292/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Mol Immunol JT - Molecular immunology JID - 7905289 RN - 0 (Dinitrobenzenes) RN - 0 (Haptens) RN - 0 (Receptors, Fc) RN - 0 (Receptors, IgE) RN - 0 (Receptors, Immunologic) RN - 333DO1RDJY (Serotonin) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Animals MH - Dinitrobenzenes/immunology MH - Haptens/*immunology MH - Immunoglobulin E/*metabolism MH - Leukemia, Experimental/immunology MH - Mast Cells/immunology MH - Rats MH - Receptors, Fc/*metabolism MH - Receptors, IgE MH - Receptors, Immunologic/*metabolism MH - Serotonin/metabolism EDAT- 1986/07/01 00:00 MHDA- 1986/07/01 00:01 CRDT- 1986/07/01 00:00 PHST- 1986/07/01 00:00 [pubmed] PHST- 1986/07/01 00:01 [medline] PHST- 1986/07/01 00:00 [entrez] AID - 10.1016/0161-5890(86)90090-8 [doi] PST - ppublish SO - Mol Immunol. 1986 Jul;23(7):783-90. doi: 10.1016/0161-5890(86)90090-8.