title: Genetic analysis of the low responsiveness to dextran B512 in CBA/N and C57BL/10ScCr mice.
abstract: CBA/N and C57BL/10ScCr mice are low responders to the antigen dextran B512. This is due to the Xid gene in CBA/N mice and to unknown genes in C57BL/10ScCr mice, although this strain is unresponsive to lipopolysaccharide (LPS) due to a defective gene in the fourth chromosome. The female F1 hybrids (C57BL/10ScCr X CBA/N) and (CBA/N X C57BL/10ScCr) were low responders to dextran, although the Xid gene is not expressed in these hybrids, indicating lack of genetic complementation. In contrast, female F1 hybrids between the dextran high-responder strains CBA or C57BL/10 as one parental strain and the low-responder strains CBA/N or C57BL/10ScCr as the other parental strain, respectively, were responders to dextran. The C57BL/10ScCr mice did not appear to have an X-linked gene determining low responsiveness to dextran. The findings suggest that the only defect in CBA/N mice cannot be the Xid gene and the only defect in C57BL/10ScCr mice cannot be the gene determining unresponsiveness to LPS.
mesh_terms: D000818:Animals; D000921:Antibody-Producing Cells / Q000276:immunology; D000955:Antigens, T-Independent / Q000235:genetics / Q000276:immunology; D003911:Dextrans / Q000276:immunology*; D004306:Dose-Response Relationship, Immunologic; D005260:Female; D006462:Hemolytic Plaque Technique; D007108:Immune Tolerance; D007135:Immunoglobulin Variable Region / Q000235:genetics; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL / Q000235:genetics*; D008808:Mice, Inbred CBA / Q000235:genetics*; D014960:X Chromosome / Q000502:physiology
chemical_list: D000955:Antigens, T-Independent; D003911:Dextrans; D007135:Immunoglobulin Variable Region