PMID- 521057 OWN - NLM STAT- MEDLINE DCOM- 19800317 LR - 20220408 IS - 0019-2805 (Print) IS - 1365-2567 (Electronic) IS - 0019-2805 (Linking) VI - 38 IP - 4 DP - 1979 Dec TI - Activation of mouse complement by different classes of mouse antibody. PG - 687-95 AB - The capacity of mouse IgM, IgGl, IgG2 and IgA anti-dinitrophenyl (DNP) antibodies to activate mouse or guinea-pig complement was studied, using a sensitive haemolytic assay and two-dimensional immunoelectrophoresis to detect cleavage of mouse C3. Three monoclonal IgM antibodies, and a heterogeneous IgM fraction, lysed trinitrophenylated erythrocytes in the presence of guinea-pig C, but failed to produce lysis in the presence of mouse C. and only activated mouse C3 very inefficiently. A monoclonal IgGl antibody did not produce haemolysis in the presence of guinea-pig or mouse C, but cleaved mouse C3 via the alternative pathway. Two IgA myeloma proteins (M315 and M460) had similar properties. A heterogeneous IgG2 antibody fraction produced haemolysis in the presence of both mouse and guinea-pig C, and was shown to activate both the classical and alternative pathways of mouse C. FAU - Klaus, G G AU - Klaus GG FAU - Pepys, M B AU - Pepys MB FAU - Kitajima, K AU - Kitajima K FAU - Askonas, B A AU - Askonas BA LA - eng PT - Journal Article PL - England TA - Immunology JT - Immunology JID - 0374672 RN - 0 (Complement C3) RN - 0 (Dinitrobenzenes) RN - 0 (Immunoglobulin A) RN - 0 (Immunoglobulin G) RN - 0 (Immunoglobulin M) RN - 0 (Immunoglobulins) RN - 0 (Trinitrobenzenes) RN - 9007-36-7 (Complement System Proteins) RN - 9013-72-3 (Hemocyanins) SB - IM MH - Animals MH - Complement C3/*immunology MH - Complement Fixation Tests MH - Complement System Proteins/*immunology MH - Dinitrobenzenes/immunology MH - Erythrocytes/immunology MH - Guinea Pigs MH - Hemocyanins/immunology MH - Hemolysis MH - Immunoglobulin A MH - Immunoglobulin G MH - Immunoglobulin M MH - Immunoglobulins/*classification MH - Mice MH - Mice, Inbred BALB C MH - Rabbits MH - Sheep MH - Trinitrobenzenes/immunology PMC - PMC1457877 EDAT- 1979/12/01 00:00 MHDA- 1979/12/01 00:01 PMCR- 1980/12/01 CRDT- 1979/12/01 00:00 PHST- 1979/12/01 00:00 [pubmed] PHST- 1979/12/01 00:01 [medline] PHST- 1979/12/01 00:00 [entrez] PHST- 1980/12/01 00:00 [pmc-release] PST - ppublish SO - Immunology. 1979 Dec;38(4):687-95.