Genetic control of the antibody response to type 3 pneumococcal polysaccharide in mice. I. Evidence that an X-linked gene plays a decisive role in determining responsiveness.
The IgM antibody response to Type III pneumococcal polysaccharide (SSS-III) was assessed in F(1), F(2), and backcross progeny derived from high (BALB/cAnN) and extremely low (CBA/HN) responding parental strains of inbred mice. The results of these studies indicated that a major component involved in the antibody response is X-linked, i.e., carried on the X chromosome; this component determines responsiveness to SSS-III in an almost quantal or "all-or-none" manner. Other factors, presumably autosomal genes, regulate the magnitude of the antibody response produced by mice possessing the X-linked gene; these appear to influence independently the number of antibody-producing cells found after immunization and the amount of antibody made by such cells. Strains of inbred mice varied widely in their ability to respond to SSS-III. Responsiveness was not associated with H-2 histocompatibility type. The implications of these findings with respect to the genetic control of the antibody response to SSS-III are discussed.
D000818:Animals; D000906:Antibodies / Q000032:analysis; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D000942:Antigens, Bacterial; D003433:Crosses, Genetic; D004912:Erythrocytes / Q000276:immunology; D004926:Escherichia coli / Q000276:immunology; D005260:Female; D006462:Hemolytic Plaque Technique; D007125:Immunogenetics; D007075:Immunoglobulin M / Q000032:analysis; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D011135:Polysaccharides, Bacterial; D012730:Sex Chromosomes; D012756:Sheep / Q000276:immunology; D013296:Streptococcus pneumoniae / Q000276:immunology
D000906:Antibodies; D000942:Antigens, Bacterial; D007075:Immunoglobulin M; D011135:Polysaccharides, Bacterial