title: Altered idiotype response to phosphocholine in mice bearing an x-linked immune defect.
abstract: The x-linked CBA/N defect results in an altered idiotype expression among the anti-phosphocholine (PC) antibodies produced after antigenic challenge with the thymic dependent antigen PC-KLH but does not preclude the response to this hapten as previously suggested. The majority of immune-defective F1 male mice can be divided into 2 groups based on their T15 idiotype profile. Group 1 mice fail to produce anti-PC antibodies bearing the T15 idiotype in either a primary or secondary response, whereas group 2 mice produce low levels of T15 idiotype; however, this idiotype often appears only after secondary immunization. These responses are distinct from the anti-PC response of normal F1 females, which is predominantly of the T15 idiotype. In addition to the altered idiotype expression, F1 male mice exhibited a greatly reduced primary anti-PC response compared to normal mice, and secondary responses were approximately one-third that of normal mice. The delayed expression of anti-PC antibodies in immune defective mice appears to be due to their inability to produce IgM anti-PC antibodies in either a primary or secondary response to PC-KLH.
mesh_terms: D000818:Animals; D002469:Cell Separation; D002794:Choline / Q000031:analogs & derivatives*; D005260:Female; D005434:Flow Cytometry; D007130:Immunoglobulin Idiotypes / Q000096:biosynthesis / Q000235:genetics* / Q000276:immunology; D007075:Immunoglobulin M / Q000096:biosynthesis; D007153:Immunologic Deficiency Syndromes / Q000235:genetics* / Q000276:immunology; D007525:Isoelectric Focusing; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D010767:Phosphorylcholine / Q000276:immunology*; D012730:Sex Chromosomes / Q000276:immunology*; D013154:Spleen / Q000276:immunology; D014960:X Chromosome / Q000276:immunology*
chemical_list: D007130:Immunoglobulin Idiotypes; D007075:Immunoglobulin M; D010767:Phosphorylcholine; D002794:Choline