title: Separation and characterization of anti-benzylpenicilloyl (BPO) antibodies. II. Immunological properties of different IgG fractions.
abstract: Affinity chromatography and subsequent ion-exchange chromatography of pooled anti-benzylpenicilloyl (anti-BPO) hyperimmune sera separated 5 different anti-BPO IgG fractions as described in the preceding paper. These fractions were tested for activities in passive hemagglutination (PHA), passive immune hemolysis (PIH), antibody-dependent cellular cytotoxicity (ADCC) and influence on IgM-induced hemolysis. It was found that anti-BPO IgG fractions with low avidity (dissociation constant K = 4.4--6.7 X 10(-8) moles/l) were poorly active in PHA and ADCC and had no blocking activity in IgM hemolysis. Among the highly avid antibodies (K = 0.7--3.4 X 10(-8) mole/l) no correlations were found between avidity and activities in the immunological tests. The results presented demonstrate that ion-exchange chromatography allows the separation of blocking and lytic antibodies as shown by their influence on IgM-induced complement-dependent lysis of lightly hapten-coated sheep erythrocytes.
mesh_terms: D000704:Analysis of Variance; D000906:Antibodies / Q000302:isolation & purification*; D000920:Antibody-Dependent Cell Cytotoxicity; D000941:Antigens; D002852:Chromatography, Ion Exchange; D006384:Hemagglutination; D006461:Hemolysis; D007143:Immunoglobulin Heavy Chains / Q000378:metabolism*; D007142:Immunoglobulin gamma-Chains / Q000378:metabolism*; D010400:Penicillin G / Q000276:immunology*
chemical_list: D000906:Antibodies; D000941:Antigens; D007143:Immunoglobulin Heavy Chains; D007142:Immunoglobulin gamma-Chains; D010400:Penicillin G