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pubmed-article:3666786pubmed:abstractTextIn the studies presented here, age-related natural antibody specificities have been investigated in the autoimmune NZB mouse strain by cell fusion. The monoclonal immunoglobulins (MIg) secreted by productive hybridoma clones were examined for their antibody activities against a panel of antigens, including single- and double-stranded DNA, actin, tubulin, myosin, bromelain-treated mouse red blood cells (BrMRBC) and TNP-BSA, employing both direct and competitive enzyme immunoassays. The antibody specificities against this panel of antigens were strikingly frequent among hybridoma clones from neonatal NZB (49%) mice, compared to normal BALB/c neonates (8.8%) shown earlier. Among neonatal hybridomas with known antigen reactivities, 73% of the clones exhibited polyspecific binding. In contrast, the majority of hybridomas from 5- and 7-month-old NZB spleen reacted monospecifically (76%) with the antigens tested. Such a characteristic reactivity pattern reflects an age-related evolution of B-cell repertoire expression. Unlike normal BALB/c mice, a high frequency of monospecific TNP-hapten-reactive clones (75%) was noticed among hybridomas of known antigen reactivities from 5- and 7-month-old NZB-strain mice, an age when autoimmune haemolytic anaemia sets in. In conclusion, an elevated frequency of autoreactive clones among neonates (49%) and an aberrant expression of TNP-reactive clones in adults seem to be an outward signal of certain discrepancies at the level of B-cell repertoire expression in autoimmune NZB-strain mice.lld:pubmed
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pubmed-article:3666786pubmed:articleTitleAge-related natural antibody specificities among hybridoma clones originating from NZB spleen.lld:pubmed
pubmed-article:3666786pubmed:affiliationd'Immunopathologie, Institut Pasteur, Paris, France.lld:pubmed
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