title: VH subgroup restriction in human erythrocyte antibodies: Studies of anti-A, anti-B, and anti-Duffy antibodies.
abstract: IgG from 13 anti-A, 26 anti-B, and 10 anti-Duffy antisera were used to coat human erythrocytes. With antisera specific for each of the three VH subgroups, VHI, VHII, and VHIII, a clear VH subgroup restriction was shown in these antibody preparations. Of the 26 IgG anti-B-coated cell preparations, 21 were agglutinated exclusively by the anti-VHIII antiserum, and 5 were agglutinated mainly by the anti-VHIII antiserum but showed also some reactions using anti-VHI or anti-VHII antiserum, or both. Similarly, 11 out of the 13 IgG anti-A antibodies belonged to VHI, and only 2 to VHIII. The 6 IgG anti-Fy(a) antibodies were restricted to subgroups VHI and VHII, and of the 4 IgG anti-Fy(b) antibodies, 3 belonged to subgroup VHIII and one to VHII. Additional experiments indicated that IgM anti-A and IgM anti-B antibodies showed the same type of restriction to VH subgroups as the corresponding IgG antibody preparations.
mesh_terms: D000017:ABO Blood-Group System; D004375:Duffy Blood-Group System; D004912:Erythrocytes / Q000276:immunology*; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007106:Immune Sera; D007114:Immunization; D007141:Immunoglobulin Fc Fragments / Q000032:analysis; D007128:Immunoglobulin Fragments / Q000032:analysis; D007074:Immunoglobulin G; D007143:Immunoglobulin Heavy Chains / Q000032:analysis; D007518:Isoantibodies / Q000032:analysis; D009194:Myeloma Proteins / Q000276:immunology
chemical_list: D000017:ABO Blood-Group System; D004375:Duffy Blood-Group System; D007106:Immune Sera; D007141:Immunoglobulin Fc Fragments; D007128:Immunoglobulin Fragments; D007074:Immunoglobulin G; D007143:Immunoglobulin Heavy Chains; D007518:Isoantibodies; D009194:Myeloma Proteins