title: Isotype profiles of anti-influenza antibodies in mice bearing the xid defect.
abstract: The humoral response to influenza A/PR8 virus was examined in the CBA/N and C3J.xid strains of mice, both of which bear an X-linked genetic defect (xid), and in strains lacking this defect. Hemagglutination-inhibiting antibody titers and measurement of virus-specific antibodies by solid-phase radioimmunoassay indicated that the xid defect does not impair the production of an adequate anti-influenza antibody response. However, investigation of the isotypes of PR8 virus-specific antibodies disclosed a relative decrease in the levels of IgG3 and IgG1 in the xid-bearing strains. This was observed after both intraperitoneal immunization and aerosol infection. The isotype differences were not reflected in the susceptibility of these strains to influenza virus infection.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000096:biosynthesis*; D001402:B-Lymphocytes / Q000276:immunology*; D006385:Hemagglutination Inhibition Tests; D007114:Immunization; D007126:Immunoglobulin Allotypes / Q000096:biosynthesis*; D007074:Immunoglobulin G / Q000096:biosynthesis*; D007075:Immunoglobulin M / Q000096:biosynthesis; D007153:Immunologic Deficiency Syndromes / Q000276:immunology*; D009980:Influenza A virus / Q000276:immunology*; D051379:Mice; D008809:Mice, Inbred C3H; D008808:Mice, Inbred CBA; D009976:Orthomyxoviridae Infections / Q000276:immunology
chemical_list: D000914:Antibodies, Viral; D007126:Immunoglobulin Allotypes; D007074:Immunoglobulin G; D007075:Immunoglobulin M