title: Influence of xid on anti-azophenylarsonate (Ar) antibody responses of (CBA/N x A/J)F1 mice: differential idiotype expression induced by only one of two Ar antigens.
abstract: The influence of an X chromosome-linked immune deficiency gene (xid) on several properties of the anti-azophenylarsonate (Ar) antibody responses of (CBA/N x A/J)F1 (NAF1) mice was examined. With respect to response magnitude, it was found that male, xid-expressing NAF1 mice showed about 1/3 the concentration of serum anti-Ar antibody as normal female NAF1 mice in hyperimmune responses to Brucella abortus (BA)-Ar. In responses induced by keyhole limpet hemocyanin (KLH)-Ar, males showed responses of about 1/8 to 1/2 the female levels, depending on the assay time point. The kinetics of the latter response were identical in mice of the two sexes. No significant difference could be detected in the time-dependent avidity maturation of the anti-Ar antibody elicited by KLH-Ar in xid vs. normal mice. The isotype profile of the day 38 anti-Ar primary response elicited by KLH-Ar in male NAF1 mice differed from that of the female mice in two ways: IgG2a levels were depressed, and a significantly lower number of the male mice demonstrated detectable IgG3 anti-Ar antibody production. The primary focus of htis work was to determine the effect of xid on the expression of the major cross-reactive idiotype--CRIA--of A strain mice. It was found that while a significant higher proportion of the female mice could be classified as high CRIA producers in responses to BA-Ar, no difference could be demonstrated if the inducing antigen was KLH-Ar. It is proposed that the difference observed with the two antigens may be due to the more selective activation by KLH-Ar of a small subset of high affinity Ar-specific clones--which may be enriched for CRIA + precursors--in both normal and immune defective mice. In contrast, BA-Ar may 'sample' more of the total anti-Ar repertoire and thus reveal within it an xid-determined depression in the proportion of CRIA + clones. Finally, it is noted that the influence of xid appears to be largely of a stochastic, and not an absolute character.
mesh_terms: D000818:Animals; D000915:Antibody Affinity; D000917:Antibody Formation; D001391:Azo Compounds / Q000276:immunology*; D002003:Brucella abortus / Q000276:immunology; D005260:Female; D006433:Hemocyanins / Q000276:immunology; D007130:Immunoglobulin Idiotypes / Q000276:immunology*; D007132:Immunoglobulin Isotypes / Q000276:immunology; D007153:Immunologic Deficiency Syndromes / Q000276:immunology*; D007700:Kinetics; D008297:Male; D051379:Mice; D008817:Mice, Mutant Strains / Q000276:immunology; D010132:p-Azobenzenearsonate / Q000276:immunology*
chemical_list: D001391:Azo Compounds; D007130:Immunoglobulin Idiotypes; D007132:Immunoglobulin Isotypes; D010132:p-Azobenzenearsonate; D006433:Hemocyanins