title: Evidence for two T-helper populations with distinct specificity in the humoral response to influenza A viruses.
abstract: Virus specificity of T-helper cells for the humoral antibody response to influenza A viruses was studied with a hapten-carrier secondary adoptive transfer system, using whole virus, or viral components inserted into liposomes as carrier with B cells primed to DNP human gamma globulin. Evidence was obtained for two distinct T-helper cell populations from mice primed by influenza infection: a T-helper cell cross-reactive for all type A influenza viruses and a second T-helper population specific for the variant haemagglutinin. In vivo the virus cross-reactive T helpers recognized whole virus, but did not recognize isolated surface glycoproteins or internal virus proteins.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000096:biosynthesis*; D000918:Antibody Specificity; D003429:Cross Reactions; D006389:Hemagglutinins, Viral / Q000276:immunology; D009980:Influenza A virus / Q000276:immunology*; D008081:Liposomes / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D006377:T-Lymphocytes, Helper-Inducer / Q000145:classification / Q000276:immunology*; D014764:Viral Proteins / Q000276:immunology
chemical_list: D000914:Antibodies, Viral; D006389:Hemagglutinins, Viral; D008081:Liposomes; D014764:Viral Proteins